This document provides startup procedures and protection settings for various components of a pulverized coal fired boiler, including:
- Induced draft fans, including startup permissives, interlocks, and protections
- Forced draft fans, including startup permissives and protections
- Primary air fans, including startup permissives, interlocks, and protections
- Bowl mills, including startup permissives, interlocks, and protections
It details the startup sequence and operating parameters for key auxiliary equipment to safely start and operate the boiler. Protective functions are defined to trip components if critical parameters like temperature, pressure, or vibration exceed limits.
The document describes the ball and tube mill used in stage-II coal milling. It discusses the key components and operating principles of the mill, including:
- The mill is a low-speed horizontal cylindrical tube that rotates and grinds coal using steel balls.
- It has a shell diameter of 4.7 meters and length of 7.2 meters, lined with steel liners and charged with 90 tons of balls or forgings for grinding.
- The mill uses instrumentation to measure critical parameters like differential pressure (DP) levels, lubrication systems, noise levels and other automatic controls to optimize mill operation.
Thermal Power Plant Simulator, Cold, warm and Hot rolling of Steam TurbineManohar Tatwawadi
The presentation describes the cold rolling, warm rolling and hot rolling and synchronising of steam turbine. The Temperature Matching Chart for Turbine metal and Steam is also discussed in the presentation
This document discusses the major components, purpose, and operation of coal mills and feeders used in pulverized fuel power plants. The key components are coal preparation equipment, mills, and feeders. Mills pulverize coal to a fine powder to efficiently burn lower grade coals and allow flexibility. Feeders transport pulverized coal from the mills to the boiler. The document describes the components and functions of bowl mills and gravimetric feeders, and provides details on their control logic and permissives to safely start, run and stop this equipment.
The document discusses the master fuel trip (MFT) logic for a circulating fluidized bed boiler. It provides details on the MFT including: conditions that generate an MFT, post-MFT actions, and special situations for boiler fans after an MFT. An MFT is generated by trips like both supply fans stopping, high or low furnace pressure, low air flow, and more. After an MFT, all coal feeders and burners shut off and fans may trip depending on furnace pressure. The document also reviews boiler hazards and protections.
The document summarizes the key components and functions of a fuel firing system and burner management system for a boiler. It describes the operational functions included like furnace purge supervision, flame monitoring, and burner protection. It explains the boiler purging process and purge permissives that must be satisfied. It also outlines the start-up processes for oil elevations in pair mode and elevation mode, including establishing ignition permits. Secondary air damper control and mill start permissives are summarized as well. The document provides an overview of the safety systems and sequences used to safely start, operate, and shut down fuel firing equipment for a high capacity boiler.
The document summarizes the key components and functions of a fuel firing system and burner management system for a boiler. It describes the operational functions included like furnace purge supervision, flame monitoring, and burner protection. It explains the boiler purging process and purge permissives that must be satisfied. It also outlines the start-up sequences for oil elevations in pair mode and elevation mode. Additional details provided include secondary air damper control, mill panel functions, field equipment, and mill start permissives.
The document describes the ball and tube mill used in stage-II coal milling. It discusses the key components and operating principles of the mill, including:
- The mill is a low-speed horizontal cylindrical tube that rotates and grinds coal using steel balls.
- It has a shell diameter of 4.7 meters and length of 7.2 meters, lined with steel liners and charged with 90 tons of balls or forgings for grinding.
- The mill uses instrumentation to measure critical parameters like differential pressure (DP) levels, lubrication systems, noise levels and other automatic controls to optimize mill operation.
Thermal Power Plant Simulator, Cold, warm and Hot rolling of Steam TurbineManohar Tatwawadi
The presentation describes the cold rolling, warm rolling and hot rolling and synchronising of steam turbine. The Temperature Matching Chart for Turbine metal and Steam is also discussed in the presentation
This document discusses the major components, purpose, and operation of coal mills and feeders used in pulverized fuel power plants. The key components are coal preparation equipment, mills, and feeders. Mills pulverize coal to a fine powder to efficiently burn lower grade coals and allow flexibility. Feeders transport pulverized coal from the mills to the boiler. The document describes the components and functions of bowl mills and gravimetric feeders, and provides details on their control logic and permissives to safely start, run and stop this equipment.
The document discusses the master fuel trip (MFT) logic for a circulating fluidized bed boiler. It provides details on the MFT including: conditions that generate an MFT, post-MFT actions, and special situations for boiler fans after an MFT. An MFT is generated by trips like both supply fans stopping, high or low furnace pressure, low air flow, and more. After an MFT, all coal feeders and burners shut off and fans may trip depending on furnace pressure. The document also reviews boiler hazards and protections.
The document summarizes the key components and functions of a fuel firing system and burner management system for a boiler. It describes the operational functions included like furnace purge supervision, flame monitoring, and burner protection. It explains the boiler purging process and purge permissives that must be satisfied. It also outlines the start-up processes for oil elevations in pair mode and elevation mode, including establishing ignition permits. Secondary air damper control and mill start permissives are summarized as well. The document provides an overview of the safety systems and sequences used to safely start, operate, and shut down fuel firing equipment for a high capacity boiler.
The document summarizes the key components and functions of a fuel firing system and burner management system for a boiler. It describes the operational functions included like furnace purge supervision, flame monitoring, and burner protection. It explains the boiler purging process and purge permissives that must be satisfied. It also outlines the start-up sequences for oil elevations in pair mode and elevation mode. Additional details provided include secondary air damper control, mill panel functions, field equipment, and mill start permissives.
This document provides information about SEG Series after-service air compressors ranging from 5HP to 15HP. It describes the key components of the compressors including the enclosure, airend, motor, cooling system, filtration system, valves, and controller. The airend uses a heavy-duty design with SKF bearings for long life. The compressor also features a centrifugal cooling fan, oil and air filters, thermo control and pressure valves, and an automated controller for protection and maintenance functions.
This document provides information on sizing regulators and control valves for gas flow applications. It discusses selecting the proper type of regulator based on factors like response time, pressure differential, and noise level. Charts are included showing typical regulator orifice sizes. Tips are provided on sizing considerations like capacity, noise reduction, differential pressure limits, and addressing issues like freezing due to Joule-Thompson cooling. Examples are given for regulator and control valve sizing calculations based on maximum and minimum flow rate, pressure, and temperature conditions. Options for adding filters, driers, and heaters to address issues like liquid dropout and cooling are also reviewed.
The document discusses the turbine protection system of a thermal power plant. It describes 13 different turbine trip conditions such as low lube oil pressure, high drum level, low main steam temperature, high exhaust steam temperature, fire protection operation, axial shift limits, low vacuum, high hydrogen cooler temperatures, high exciter air temperatures, liquid in bushings, master fuel trip, generator faults, and emergency trip from control room. It provides details on the logic, sensors, and mechanisms for each protection system to safely trip the turbine during abnormal operating conditions.
The document describes the key components and operating parameters of high pressure ammonia feed pumps (P-1). P-1 pumps ammonia at high pressure from 20-240 kg/cm2. It consists of reciprocating plungers, packing seals, lube oil systems, and driving components. Critical parameters include plunger speed, discharge pressure, seal water pressure, and lube oil pressure which are monitored to protect the pump. Detailed startup, operation, and shutdown procedures are outlined to safely charge and depressurize the pump.
Unit lightup synchronisation & shutdownNitin Mahalle
This document provides information about the start-up process for a 660 MW power generating unit at Adani Power Limited in Tiroda, India. It discusses the key steps in preparing boiler and turbine systems, warming up and rolling the turbine, synchronizing with the grid, and gradually loading the unit to full power. The start-up involves flushing the boiler, lighting the furnace, warming casings, rolling the turbine to operating speed, switching over steam flows, and cutting in coal mills in stages to ramp up load. Critical parameters are monitored at each stage to ensure safe and efficient start-up of the unit.
Pre commissioning steam turbines load trialNagesh H
The document discusses pre-commissioning and commissioning activities for a steam turbine. Pre-commissioning includes steam blowing of lines, condenser testing like leak and vacuum drop tests, checking bearing clearances and dumps, setting throttle valves, and verifying safety trips. Commissioning procedures cover starting the turbine in solo run and load run modes while monitoring vibration levels and other parameters. Load trial data is collected and actual steam consumption is compared to projected values, with correction factors applied. Problems faced on site included low dump values due to nozzle chest welding issues and high CEP current due to pump-motor misalignment.
The document describes the cargo pumping system of an oil tanker, including three cargo oil pumps that can pump 5,500 cubic meters per hour of crude oil. It also describes ballast pumps, stripping pumps, and an automatic vacuum stripping system to remove oil residues from cargo tanks after unloading. The system uses a separator, vapor extraction valves, and a vacuum pump controlled by level transmitters to efficiently strip tanks as the cargo level falls during unloading operations.
The document describes the cargo pumping system of an oil tanker, including three cargo oil pumps that can pump 5,500 cubic meters per hour of crude oil. It also describes ballast pumps, stripping pumps, and an automatic vacuum stripping system to remove residual oil from cargo tanks after unloading. The system uses a separator, vapor extraction valves, and a vacuum pump controlled by level transmitters to efficiently strip tanks as the cargo level falls during unloading operations.
Komatsu WA150PZ-5 Wheel Loader Service Repair Manual (SN H50051 and up).pdfjiangshou26
This shop manual provides specifications and maintenance procedures for the WA150PZ-5 wheel loader. It includes the following sections:
1. General - Contains assembly drawings, specifications, weights, lubricant list. Notes the machine is powered by a Komatsu SAA4D102E-2 diesel engine.
2. Structure, Function and Maintenance Standards - Covers components like the engine mount, cooling system, power train, and hydraulic system. Includes diagrams of systems.
3. Testing and Adjusting - Covers procedures for testing and adjusting components.
4. Disassembly and Assembly - Provides instructions for disassembling and assembling components.
5. Others - May contain additional information
Komatsu WA150PZ-5 Wheel Loader Service Repair Manual (SN H50051 and up).pdfpaidongzhong6790
This document provides specifications and assembly drawings for a WA150PZ-5 wheel loader. It includes:
- Dimensions, weights, performance data and engine specifications.
- Assembly drawings showing dimensions for overall length, height, width, bucket size and other details.
- Tables listing components and their weights to aid in transport and handling.
- Lists of recommended lubricants and fluids for systems like the engine, hydraulics, axles and more.
The document is an operations and maintenance manual providing essential technical information for safe and proper use of the WA150PZ-5 wheel loader.
Komatsu WA150PZ-5 Wheel Loader Service Repair Manual (SN H50051 and up).pdffragmentkqdpry
This shop manual provides specifications and maintenance procedures for the WA150PZ-5 wheel loader. It includes the following sections:
1. General - Contains assembly drawings, specifications, weights, lubricant list. Notes the machine is powered by a Komatsu SAA4D102E-2 diesel engine.
2. Structure, Function and Maintenance Standards - Covers components like the engine mount, cooling system, power train, and hydraulic system. Includes diagrams of systems.
3. Testing and Adjusting - Covers procedures for testing and adjusting components.
4. Disassembly and Assembly - Provides instructions for disassembling and assembling major components.
5. Others - May contain additional
The document provides an introduction and overview of governing systems for steam turbines. It defines a governing system as a control mechanism that regulates steam turbine parameters like inlet pressure and steam flow rate to enable stable power production. It describes the main types as nozzle and throttle governing and notes most LMW turbines use nozzle while KWU turbines use throttle governing. It outlines the key components of KWU turbine governing systems including control valves, pumps, speeders and more. It provides details on operating parameters and functions of different elements.
A reciprocating compressor uses pistons driven by a crankshaft to compress gases. It can operate from vacuum to very high pressures. The document discusses the key components of a reciprocating compressor system including cylinders, valves, coolers, pulsation suppression devices, piping, instrumentation, and controls. Process calculations like pipe sizing, blowdown analysis, and hydrate predictions are required. A process simulation and PFD provide design details. Capacity control methods include speed variation, clearance pockets, and suction unloaders.
This document provides an overview of electric submersible pumping (ESP) systems. It discusses that ESP systems are high-volume production tools that can operate in deep wells with little surface space needed. It describes the key components of an ESP system including the motor, seal section, gas separator, centrifugal pump, and power cable. It provides specifications on operating parameters like depth, flow rate, temperature, and deviation. It also reviews advantages like high efficiency and adaptability, as well as limitations such as requiring electric power and difficulties handling gas or solids. The document concludes with describing the surface equipment and providing steps for selecting an ESP for a given well.
This document is a training report submitted by Vivek Kumar Srivastava summarizing his six-week summer training at OPAL ENGINEERING CORPORATION from June 15th to July 15th, 2016. It provides an overview of the company, the services they provide including diesel engines and generators, and the technical skills learned during training such as engine assembly, measurement, and testing procedures. Key activities included learning about engine assembly, testing engines on a dynamometer to evaluate performance and fuel consumption, and maintaining testing records.
Power Plant Simulator, Unloading and shutting the TurbogeneratorManohar Tatwawadi
The Presentation describes the steps for gradual unloading of the machine/turbogenerator for a planned shutdown. The steps are described in the presentation.
The document provides information on the fuel storage and distribution system of the Boeing 747-400 aircraft. It describes the locations and capacities of the main fuel tanks and describes the functions of the fuel pumps, valves, and controls. It also outlines different indications that appear on the fuel system displays under various flight conditions and fuel levels.
Komatsu wa150 pz 5 wheel loader service repair manual (sn h50051 and up)fjjkekfksemmm
The document is a shop manual for a WA150PZ-5 wheel loader. It contains specifications, assembly drawings, maintenance procedures, and testing/adjusting sections for the machine. Key details include:
- The machine weighs 8,480 kg and has a 1.5 m3 bucket capacity. It is powered by a Komatsu SAA4D102E-2 diesel engine.
- Sections cover the machine's structure, testing/adjusting procedures, disassembly/assembly, and other maintenance topics.
- Specification tables list operating weights, performance data, dimensions, engine details and hydraulic system components.
- The manual provides maintenance information for systems like the engine, cooling, powert
The document discusses differential pressure controls types MP 54, 55, and 55A.
It provides information on their use as safety switches to protect compressors from insufficient lubricating oil pressure. If oil pressure fails, the differential pressure control will stop the compressor after a set time delay.
The MP 54 has a fixed differential pressure setting and built-in time delay relay. The MP 55 and 55A have adjustable differential pressures and can be supplied with or without time delay relays.
This document discusses the control and instrumentation system for the Jaypee Bina Thermal Power Plant's 2x250 MW furnace safeguard and supervisory system (FSSS). The FSSS is designed to safely start up and shut down the boiler and prevent operator errors. It monitors the burner block assembly and controls the furnace purge sequence, oil gun operation in pair or elevation mode, and high energy arc igniter system to safely initiate combustion. The FSSS ensures maximum safety and efficiency during plant operation.
This document provides information about SEG Series after-service air compressors ranging from 5HP to 15HP. It describes the key components of the compressors including the enclosure, airend, motor, cooling system, filtration system, valves, and controller. The airend uses a heavy-duty design with SKF bearings for long life. The compressor also features a centrifugal cooling fan, oil and air filters, thermo control and pressure valves, and an automated controller for protection and maintenance functions.
This document provides information on sizing regulators and control valves for gas flow applications. It discusses selecting the proper type of regulator based on factors like response time, pressure differential, and noise level. Charts are included showing typical regulator orifice sizes. Tips are provided on sizing considerations like capacity, noise reduction, differential pressure limits, and addressing issues like freezing due to Joule-Thompson cooling. Examples are given for regulator and control valve sizing calculations based on maximum and minimum flow rate, pressure, and temperature conditions. Options for adding filters, driers, and heaters to address issues like liquid dropout and cooling are also reviewed.
The document discusses the turbine protection system of a thermal power plant. It describes 13 different turbine trip conditions such as low lube oil pressure, high drum level, low main steam temperature, high exhaust steam temperature, fire protection operation, axial shift limits, low vacuum, high hydrogen cooler temperatures, high exciter air temperatures, liquid in bushings, master fuel trip, generator faults, and emergency trip from control room. It provides details on the logic, sensors, and mechanisms for each protection system to safely trip the turbine during abnormal operating conditions.
The document describes the key components and operating parameters of high pressure ammonia feed pumps (P-1). P-1 pumps ammonia at high pressure from 20-240 kg/cm2. It consists of reciprocating plungers, packing seals, lube oil systems, and driving components. Critical parameters include plunger speed, discharge pressure, seal water pressure, and lube oil pressure which are monitored to protect the pump. Detailed startup, operation, and shutdown procedures are outlined to safely charge and depressurize the pump.
Unit lightup synchronisation & shutdownNitin Mahalle
This document provides information about the start-up process for a 660 MW power generating unit at Adani Power Limited in Tiroda, India. It discusses the key steps in preparing boiler and turbine systems, warming up and rolling the turbine, synchronizing with the grid, and gradually loading the unit to full power. The start-up involves flushing the boiler, lighting the furnace, warming casings, rolling the turbine to operating speed, switching over steam flows, and cutting in coal mills in stages to ramp up load. Critical parameters are monitored at each stage to ensure safe and efficient start-up of the unit.
Pre commissioning steam turbines load trialNagesh H
The document discusses pre-commissioning and commissioning activities for a steam turbine. Pre-commissioning includes steam blowing of lines, condenser testing like leak and vacuum drop tests, checking bearing clearances and dumps, setting throttle valves, and verifying safety trips. Commissioning procedures cover starting the turbine in solo run and load run modes while monitoring vibration levels and other parameters. Load trial data is collected and actual steam consumption is compared to projected values, with correction factors applied. Problems faced on site included low dump values due to nozzle chest welding issues and high CEP current due to pump-motor misalignment.
The document describes the cargo pumping system of an oil tanker, including three cargo oil pumps that can pump 5,500 cubic meters per hour of crude oil. It also describes ballast pumps, stripping pumps, and an automatic vacuum stripping system to remove oil residues from cargo tanks after unloading. The system uses a separator, vapor extraction valves, and a vacuum pump controlled by level transmitters to efficiently strip tanks as the cargo level falls during unloading operations.
The document describes the cargo pumping system of an oil tanker, including three cargo oil pumps that can pump 5,500 cubic meters per hour of crude oil. It also describes ballast pumps, stripping pumps, and an automatic vacuum stripping system to remove residual oil from cargo tanks after unloading. The system uses a separator, vapor extraction valves, and a vacuum pump controlled by level transmitters to efficiently strip tanks as the cargo level falls during unloading operations.
Komatsu WA150PZ-5 Wheel Loader Service Repair Manual (SN H50051 and up).pdfjiangshou26
This shop manual provides specifications and maintenance procedures for the WA150PZ-5 wheel loader. It includes the following sections:
1. General - Contains assembly drawings, specifications, weights, lubricant list. Notes the machine is powered by a Komatsu SAA4D102E-2 diesel engine.
2. Structure, Function and Maintenance Standards - Covers components like the engine mount, cooling system, power train, and hydraulic system. Includes diagrams of systems.
3. Testing and Adjusting - Covers procedures for testing and adjusting components.
4. Disassembly and Assembly - Provides instructions for disassembling and assembling components.
5. Others - May contain additional information
Komatsu WA150PZ-5 Wheel Loader Service Repair Manual (SN H50051 and up).pdfpaidongzhong6790
This document provides specifications and assembly drawings for a WA150PZ-5 wheel loader. It includes:
- Dimensions, weights, performance data and engine specifications.
- Assembly drawings showing dimensions for overall length, height, width, bucket size and other details.
- Tables listing components and their weights to aid in transport and handling.
- Lists of recommended lubricants and fluids for systems like the engine, hydraulics, axles and more.
The document is an operations and maintenance manual providing essential technical information for safe and proper use of the WA150PZ-5 wheel loader.
Komatsu WA150PZ-5 Wheel Loader Service Repair Manual (SN H50051 and up).pdffragmentkqdpry
This shop manual provides specifications and maintenance procedures for the WA150PZ-5 wheel loader. It includes the following sections:
1. General - Contains assembly drawings, specifications, weights, lubricant list. Notes the machine is powered by a Komatsu SAA4D102E-2 diesel engine.
2. Structure, Function and Maintenance Standards - Covers components like the engine mount, cooling system, power train, and hydraulic system. Includes diagrams of systems.
3. Testing and Adjusting - Covers procedures for testing and adjusting components.
4. Disassembly and Assembly - Provides instructions for disassembling and assembling major components.
5. Others - May contain additional
The document provides an introduction and overview of governing systems for steam turbines. It defines a governing system as a control mechanism that regulates steam turbine parameters like inlet pressure and steam flow rate to enable stable power production. It describes the main types as nozzle and throttle governing and notes most LMW turbines use nozzle while KWU turbines use throttle governing. It outlines the key components of KWU turbine governing systems including control valves, pumps, speeders and more. It provides details on operating parameters and functions of different elements.
A reciprocating compressor uses pistons driven by a crankshaft to compress gases. It can operate from vacuum to very high pressures. The document discusses the key components of a reciprocating compressor system including cylinders, valves, coolers, pulsation suppression devices, piping, instrumentation, and controls. Process calculations like pipe sizing, blowdown analysis, and hydrate predictions are required. A process simulation and PFD provide design details. Capacity control methods include speed variation, clearance pockets, and suction unloaders.
This document provides an overview of electric submersible pumping (ESP) systems. It discusses that ESP systems are high-volume production tools that can operate in deep wells with little surface space needed. It describes the key components of an ESP system including the motor, seal section, gas separator, centrifugal pump, and power cable. It provides specifications on operating parameters like depth, flow rate, temperature, and deviation. It also reviews advantages like high efficiency and adaptability, as well as limitations such as requiring electric power and difficulties handling gas or solids. The document concludes with describing the surface equipment and providing steps for selecting an ESP for a given well.
This document is a training report submitted by Vivek Kumar Srivastava summarizing his six-week summer training at OPAL ENGINEERING CORPORATION from June 15th to July 15th, 2016. It provides an overview of the company, the services they provide including diesel engines and generators, and the technical skills learned during training such as engine assembly, measurement, and testing procedures. Key activities included learning about engine assembly, testing engines on a dynamometer to evaluate performance and fuel consumption, and maintaining testing records.
Power Plant Simulator, Unloading and shutting the TurbogeneratorManohar Tatwawadi
The Presentation describes the steps for gradual unloading of the machine/turbogenerator for a planned shutdown. The steps are described in the presentation.
The document provides information on the fuel storage and distribution system of the Boeing 747-400 aircraft. It describes the locations and capacities of the main fuel tanks and describes the functions of the fuel pumps, valves, and controls. It also outlines different indications that appear on the fuel system displays under various flight conditions and fuel levels.
Komatsu wa150 pz 5 wheel loader service repair manual (sn h50051 and up)fjjkekfksemmm
The document is a shop manual for a WA150PZ-5 wheel loader. It contains specifications, assembly drawings, maintenance procedures, and testing/adjusting sections for the machine. Key details include:
- The machine weighs 8,480 kg and has a 1.5 m3 bucket capacity. It is powered by a Komatsu SAA4D102E-2 diesel engine.
- Sections cover the machine's structure, testing/adjusting procedures, disassembly/assembly, and other maintenance topics.
- Specification tables list operating weights, performance data, dimensions, engine details and hydraulic system components.
- The manual provides maintenance information for systems like the engine, cooling, powert
The document discusses differential pressure controls types MP 54, 55, and 55A.
It provides information on their use as safety switches to protect compressors from insufficient lubricating oil pressure. If oil pressure fails, the differential pressure control will stop the compressor after a set time delay.
The MP 54 has a fixed differential pressure setting and built-in time delay relay. The MP 55 and 55A have adjustable differential pressures and can be supplied with or without time delay relays.
This document discusses the control and instrumentation system for the Jaypee Bina Thermal Power Plant's 2x250 MW furnace safeguard and supervisory system (FSSS). The FSSS is designed to safely start up and shut down the boiler and prevent operator errors. It monitors the burner block assembly and controls the furnace purge sequence, oil gun operation in pair or elevation mode, and high energy arc igniter system to safely initiate combustion. The FSSS ensures maximum safety and efficiency during plant operation.
TIME DIVISION MULTIPLEXING TECHNIQUE FOR COMMUNICATION SYSTEMHODECEDSIET
Time Division Multiplexing (TDM) is a method of transmitting multiple signals over a single communication channel by dividing the signal into many segments, each having a very short duration of time. These time slots are then allocated to different data streams, allowing multiple signals to share the same transmission medium efficiently. TDM is widely used in telecommunications and data communication systems.
### How TDM Works
1. **Time Slots Allocation**: The core principle of TDM is to assign distinct time slots to each signal. During each time slot, the respective signal is transmitted, and then the process repeats cyclically. For example, if there are four signals to be transmitted, the TDM cycle will divide time into four slots, each assigned to one signal.
2. **Synchronization**: Synchronization is crucial in TDM systems to ensure that the signals are correctly aligned with their respective time slots. Both the transmitter and receiver must be synchronized to avoid any overlap or loss of data. This synchronization is typically maintained by a clock signal that ensures time slots are accurately aligned.
3. **Frame Structure**: TDM data is organized into frames, where each frame consists of a set of time slots. Each frame is repeated at regular intervals, ensuring continuous transmission of data streams. The frame structure helps in managing the data streams and maintaining the synchronization between the transmitter and receiver.
4. **Multiplexer and Demultiplexer**: At the transmitting end, a multiplexer combines multiple input signals into a single composite signal by assigning each signal to a specific time slot. At the receiving end, a demultiplexer separates the composite signal back into individual signals based on their respective time slots.
### Types of TDM
1. **Synchronous TDM**: In synchronous TDM, time slots are pre-assigned to each signal, regardless of whether the signal has data to transmit or not. This can lead to inefficiencies if some time slots remain empty due to the absence of data.
2. **Asynchronous TDM (or Statistical TDM)**: Asynchronous TDM addresses the inefficiencies of synchronous TDM by allocating time slots dynamically based on the presence of data. Time slots are assigned only when there is data to transmit, which optimizes the use of the communication channel.
### Applications of TDM
- **Telecommunications**: TDM is extensively used in telecommunication systems, such as in T1 and E1 lines, where multiple telephone calls are transmitted over a single line by assigning each call to a specific time slot.
- **Digital Audio and Video Broadcasting**: TDM is used in broadcasting systems to transmit multiple audio or video streams over a single channel, ensuring efficient use of bandwidth.
- **Computer Networks**: TDM is used in network protocols and systems to manage the transmission of data from multiple sources over a single network medium.
### Advantages of TDM
- **Efficient Use of Bandwidth**: TDM all
A review on techniques and modelling methodologies used for checking electrom...nooriasukmaningtyas
The proper function of the integrated circuit (IC) in an inhibiting electromagnetic environment has always been a serious concern throughout the decades of revolution in the world of electronics, from disjunct devices to today’s integrated circuit technology, where billions of transistors are combined on a single chip. The automotive industry and smart vehicles in particular, are confronting design issues such as being prone to electromagnetic interference (EMI). Electronic control devices calculate incorrect outputs because of EMI and sensors give misleading values which can prove fatal in case of automotives. In this paper, the authors have non exhaustively tried to review research work concerned with the investigation of EMI in ICs and prediction of this EMI using various modelling methodologies and measurement setups.
Harnessing WebAssembly for Real-time Stateless Streaming PipelinesChristina Lin
Traditionally, dealing with real-time data pipelines has involved significant overhead, even for straightforward tasks like data transformation or masking. However, in this talk, we’ll venture into the dynamic realm of WebAssembly (WASM) and discover how it can revolutionize the creation of stateless streaming pipelines within a Kafka (Redpanda) broker. These pipelines are adept at managing low-latency, high-data-volume scenarios.
KuberTENes Birthday Bash Guadalajara - K8sGPT first impressionsVictor Morales
K8sGPT is a tool that analyzes and diagnoses Kubernetes clusters. This presentation was used to share the requirements and dependencies to deploy K8sGPT in a local environment.
Optimizing Gradle Builds - Gradle DPE Tour Berlin 2024Sinan KOZAK
Sinan from the Delivery Hero mobile infrastructure engineering team shares a deep dive into performance acceleration with Gradle build cache optimizations. Sinan shares their journey into solving complex build-cache problems that affect Gradle builds. By understanding the challenges and solutions found in our journey, we aim to demonstrate the possibilities for faster builds. The case study reveals how overlapping outputs and cache misconfigurations led to significant increases in build times, especially as the project scaled up with numerous modules using Paparazzi tests. The journey from diagnosing to defeating cache issues offers invaluable lessons on maintaining cache integrity without sacrificing functionality.
2. Index
• Startup Procedure of Boiler andAuxiliaries
1. Induced Draft Fan
2. Forced Draft Fan
3. PrimaryAir Fan
4. Mills
5. Coal Feeders
6. Air Pre Heaters
7. Burners
3. ID Fan
• START PERMISSIVES
• ID FAN REGULATING DAMPER MIN POSITION (< 10%)
• ID FAN SCOOP MIN POSITION (< 10%)
• ID FAN OUTLET GATE - FULL CLOSED
• ID FAN INLET GATE - FULL CLOSED
• LUBE OIL PRESSURE ADEQUATE (> 0.8 KG/CM2) [TAG - HNC11CP201]
• ID FAN BEARING TEMP NOT HI (< 850 C)
• MOTOR BEARING TEMP NOT HI (< 950 C)
• MOTOR WINDING TEMP NOT HI (< 1050C, ALL 6)
• ANY FLUE GAS PATH (A OR B) AVAILABLE
• APH - A ELECTRIC OR AIR MOTOR ON
•
•
•
•
•
•
•
•
APH - A FLUE GAS INLET DAMPER & OUT LET GATE OPEN
ESP - A PASS OUT LET GATE OPEN
OR
APH - B ELECTRIC OR AIR MOTOR ON
APH - B FLUE GAS INLET DAMPER & OUT LET GATE OPEN
ESP - B PASS OUT LET GATE OPEN
PATH - A AVAILABLE
PATH - B AVAILABLE
HT MOTOR START PERMISSIVES SATISFIED (REFER HT MOTORS)
15 SEC TIMER SHOULD ELAPSE AFTER THE PREVIOUS START OF ANY HT MOTOR (BFP
, ID,
CWP)
4. • INTERLOCKS
STAND BY LOP STARTS
• IF FAN IS RUNNING AND LUB OIL HEADER PRESURE < 0.6 KSC (60 SEC
TIME DELAY) OR
• IF FAN IS RUNNING AND RUNNING LOP TRIPS >1 SEC AND OTHER LOP IN
STANDBY
.
ID FAN INLET AND OUTLET GATE WILL OPEN ON AUTO, IF
• ID FAN IS RUNNING (60SEC DELAY) [IF OTHER FAN IS NOT RUNNING GATE
WILL OPEN IMMEDIATELY] OR
• ID FAN A & B ARE NOT RUNNING.
ID FAN INLET /OUTLET GATE CLOSE PERMISSIVE WILL BE AVAILABLE ONLY
WHEN FAN NOT RUNNING.
ID FAN INLET/OUTLET GATE CLOSE ON AUTO IF ID FAN TRIPS AND OTHER ID
FAN IS RUNNING & ONE FD FAN IN SERVICE.
AFTER START COMMAND
• OUTLET & INLET GATE CLOSE, IGV & SCOOP GO FOR MINIMUM FOR
SELECTED FAN
• SELECTED FAN MOTOR STARTS
• OUTLET & INLET GATE CLOSE, IGV & SCOOP GO FOR MINIMUM FOR
STAND BY FAN IF IT IS NOT IN SERVICE
•OUTLET GATE OPENS & THEN INLET GATE OPENS FOR THE STARTED FAN.
RUNBACK ON ONE ID FAN TRIPPING IS 90MW.
5. PROTECTIONS
S.N. DESCRIPTION VALUES TIMER
(SEC)
ALARM TRIP
1. 1 ID FAN BRG TEMP (DE & NDE) 0C 60 75 85 5
1. 2 ID FAN MOTOR BRG TEMP (DE &
NDE) 0C
60 85 95 5
1. 3 ID FAN BRG VIBRATION
(MM/SEC)
0.5 4.5 - -
1. 4 MOTOR BRG VIBRATION
(MM/SEC)
0.5 4.5 -
1. 4 LUBE OIL PRESSURE (KG/CM2)
[HNC11CP205]
1.0 0.4 0.2 10
1. 6 H/C COOLER OIL I/L TEMP (0C)
[HNC12CT201]
95 100 110 -
1. 7 H/C COOLER OIL O/L TEMP (0C)
[HNC12CT202]
70 80 90 -
1. 8 ID FAN MTR WDG TEMP (0C) [2 /
6]
80 105 120 5
1. 9 H/C LUBE OIL PRESSURE
(KG/CM2)
[HNC22/11CP201-4]
1.0 0.8 0.6 15
DURING
STARTIN
G
1. 10 H/C LUBE OIL FILTER DP
(KG/CM2)
< 0.4 0.65 - HIGH
0.7 - V HIGH
- -
1. 11 POST PURGE FAN TRIP FROM
BMS *
- 10 + 75 -175 /
+150
-
6. ID Fan
• ID & FD FANS WILLTRIPON POST PURGE IF
FURNACE PRESSURE EXCEEDS > +150 OR < -175
MMWCAFTER PURGE COMPLETEAND BEFORE HFO
TRIPV
ALVE OPENS.
• POST PURGE TRIP:AFTER 5 MINUTES OF PURGING,
BOILERAIR FLOW > 40%,ALLFEEDERS & MILLS
OFF,ALLOILV
ALVES CLOSED, NO FLAME
DETECTED,ALLGAS V
ALVES CLOSED, THEN BOTH
ID FANSAND FD FANS WILLTRIPIF FURNACE
PRESSURE VERYHIGH OR VERYLOW OCCURS
• CONSCUTIVE STARTTIMER WILLRESETTO ZERO
WHENALL6 WINDING TEMPERA
TURE < 500C &
BREAKER STOP> 2 HOURS.
7. FD FAN
• START PERMISSIVES
• LUB OIL PRESSURE > 0.8 KSC
• CONTROL OIL PRESSURE > 8.0 KSC
• BLADE PITCH AT MINIMUM POSITION (<10%)
• OUT LET DAMPER CLOSED
• FAN BEARING TEMPERATURE NOT HIGH (<850C)
• MOTOR BEARING TEMPERATURE (DE/NDE) NOT HIGH (<850C)
• MOTOR WINDING TEMPERATURE (<1050C)
• ANY ID FAN IS RUNNING & OTHER FD FAN IS OFF
• (SECOND FD FAN WILL START ONLY IF BOTH ID FANS ARE
RUNNING)
• HT MOTOR START PERMISSIVES SATISFIED (REFER HT MOTORS)
8. PROTECTION
Sr.N. DESCRIPTION VALUE TIMER
(SEC)
ALARM TRIP
1. 1 MOTOR WINDING TEMPERATURE
(0C) [2 / 6]
80 105 120 5
1. 2 FD FAN & MOTOR BRG TEMP (DE
& NDE) 0C
60 85 95 5
1. 3 FAN BRG VIBRATION (MM/SEC) 0.5 4.5 - -
1. 4 MOTOR BRG VIBRATION
(MM/SEC)
0.5 4.5 -
1. 5 POST PURGE FAN TRIP FROM BMS - 10 + 75 -175
/
+150
-
1. 6 BOTH ID FANS OFF / TRIP FROM FSSS
9. PA FAN
• PERMISSIVE
• PA FAN LUBE OIL PRESSURE ADEQUATE (> 0.8 KSC) [HFE11CP201]
• H/C SCOOP MIN. POSITION (< 5%)
• FAN INLET REGULATING DAMPER MIN. POSITION (< 5%)
• FAN OUTLET DAMPER FULL CLOSE
• MOTOR BEARING TEMP
. (DE & NDE) NOT HIGH (< 85OC)
• FAN BEARING TEMP
. (DE & NDE) NOT HIGH (< 75OC)
• ALL MOTOR WINDING TEMP
. NOT HIGH (< 105OC)
• PURGE COMPLETED
• ANY FD FAN IS RUNNING.
• HT MOTOR START PERMISSIVES SATISFIED (REFER HT MOTORS)
• WINDING TEMP NOT HIGH AND BOTH APH PATH ARE I/S
• APH-A ON
• APH-A PA I/L & O/L DAMPER FULL OPEN AND APH-B ON
• APH-B PA I/L & O/L DAMPER FULL OPEN
OR [ANY APH ON AND OTHER PA FAN NOT I/S]
10. INTERLOCKS
AFTER GIVING START COMMAND TO PA FAN
• FAN MOTOR STARTS.
• OUT LET DAMPER OF STARTED FAN OPENS AFTER 60 SECONDS (IF
DAMPER IN AUTO)
STAND BY LOP OF PA FAN STARTS
• IF FAN IS RUNNING AND LUB OIL PRESURE < 0.6 KSC (60 SEC TIME DELAY)
OR
• IF FAN IS RUNNING AND RUNNING LOP TRIPS.
SECOND SEAL AIR FAN WILL START AUTOMATICALLY
• IF ANY PA FAN IS RUNNING AND SEAL AIR TO COLD PA DP IS LOW (< 100
MMWC) FOR 10 SEC. AND SEAL AIR FAN NOT RED TAGGED AND OUT OF
SERVICE IS NOT ALARM NOT PERSISTING OR
• FIRST SEAL AIR FAN FAILED TO START AFTER A START COMMAND
SEAL AIR FAN (S) WILL STOP ON ANY OF FOLLOWING CONDITIONS
• BOTH PA FANS NOT RUNNING FOR 15 SEC.
• BOTH SEAL AIR FANS RUNNING AND SEAL AIR TO COLD PA DP NOT LOW
AND COMMAND GIVEN FOR STOPPING.
11. PROTECTION
Sr.N. DESCRIPTION VALUES TIMER
(SEC)
ALARM TRIP
1. 1 LUB OIL PRESSURE (KSC)
[HFE11CP205]
>1.0 0.4 0.2 2 SEC
1. 2 MOTOR BEARING TEMP. (DE & NDE)
(OC)
50-60 85 95 5
1. 3 FAN BEARING TEMP. (DE & NDE) OC 40-50 65 75 5
1. 4 FAN BEARING VIBRATION (MM/SEC) 1.0 4.5 - -
1. 5 MOTOR BEARING VIBRATION
(MM/SEC)
1.0 4.5 -
1. 6 MOTOR WINDING TEMP (OC) [2 / 6] 80 105 120 5 SEC
1. 7 H/C WORKING OIL COOLER I/L TEMP.
(OC) [HFE12CT201-3]
<95 100 110 2 SEC
1. 8 H/C WORKING OIL COOLER O/L TEMP
(OC) [HFE12CT202-3]
<70 80 90 2 SEC
1. 9 H/C LUB OIL PRESSURE (KSC)
[HFE12CP201-4]
>1.0 <0.8 0.6 15
DURING
STARTI
NG
1. 10 H/C LUBE OIL FILTER DP (KG/CM2) < 0.4 0.4 - HIGH
0.6 - V
HIGH
- -
1. 11 BOILER TRIP FROM FSSS - - TRIP -
12. BOWL MILL
• PERMISSIVES
BOTH PA FANS RUNNING OR ONE PA FAN RUNNING AND NO MILL IN SERVICE.
IGNITION ENERGY AVAILABLE
• AT LEAST 3 OIL GUNS IN SERVICE AT THE ADJACENT OIL ELEVATION OR
• ADJACENT COAL FEEDER SPEED > 50% & FEEDER RUN FOR 50 SEC AND BOILER LOAD > 30 %
• BOILER LOAD > 30% AND MORE THAN 2 X1 ELEVATION BURNERS IN SERVICE (ONLY FOR
MILL-A)
LUBE OIL OK
• LUBE OIL PRESSURE ADEQUATE (> 2.4 KSC) FOR 5 MIN CONTINUOUSLY
• OIL FILTER CLEAN (DP < 1.0 KSC)
• LUBE OIL LEVEL ADEQUATE
• SUMP OIL TEMPERATURE ADEQUATE (>22 0C)
PULVERIZER OUT LET TEMPERATURE < 940 C WITH GOOD QUALITY SIGNAL
MILL INERTING STEAM VALVE CLOSED AND BREAKER NOT IN TEST.
ALL MILL DISCHARGE VALVE & BURNER MANUAL ISOLATION VALVE OPEN (FORCED)
TRAMP IRON HOPPER VALVE OPEN (FORCED).
PULVERIZER BREAKER & GRAVIMETRIC FEEDER IN REMOTE.
COLD AIR GATE OPEN (FORCED).
13. FURNACE FIRING PERMISSIVE SATISFIED.
•SCANNER FAN AC OR DC RUNNING
• ALL BURNER TILT AT HORIZONTAL OR ANY OIL ELEVATION IN SERVICE
• PURGE COMPLETE
• BOTH MFT RELAY RESET
• NO FURNACE FIRING INHIBIT SIGNAL
•NO COAL/OIL/GAS/IGNITOR ELEVATION BURNERS TRIPPED PERSISTING.
HT MOTOR START PERMISSIVES SATISFIED (REFER HT MOTORS)
MILL TRIP RESET.
SLAVE QUALITY O.K
ACFS ELEVATION A / B / C NOT SELECTED
ACFS MDV / MMV / PAV / CIV STATUS O.K (FORCED)
PULVERIZER NOT RED TAGGED
SEAL AIR VALVE OPEN
PULVERIZER TO SEAL AIR DP > 200mmwc
MOTOR FEEDER NOT FAULTY
START PULV SEQUENCE COMMAND GIVEN
14. INTERLOCKS
• IF ANY PA FAN TRIPS TOP ELEVATION MILL WILL TRIP DIRECTLY
• LUB OIL PUMP WILL START ONLY IF SUMP LEVEL IS ADEQUATE &
OIL TEMPERATURE IS >15 0C
• HOT AIR DAMPER WILL OPEN BY 10% ON HOT AIR GATE OPENING.
• WHEN MILL IS STOPPED, COLD AIR DAMPER WILL GO FOR 5%
OUTTRACK OPEN & IF MILL SEAL AIR VALVE IS CLOSED COLD AIR
DAMPER WILL CLOSE COMPLETELY
.
• MILL AIR FLOW DEPENDS ON FEEDER SPEED:
• FOR FEED RATE 0-33% AIR FLOW WILL BE 27.6 TPH & FOR FEED
RATE 33%-100% AIR FLOW WILL BE 27.6TPH TO 36 TPH LINEAR
• IF DUST IS IN SERVICE, 40% OF DUST FEEDRATE WILL BE ADDED
WITH FEEDER FEED RATE AND AIR FLOW WILL BE AS GIVEN ABOVE
15. SLNO DESCRIPTION
VALUES TIMER
(SEC)
ALARM TRIP
1. 1 LUB OIL PRESSURE LOW > 2.4 1.2 0.75 10
1. 2 LUB OIL FILTER DP HIGH < 0.5 0.6 - 2
1. 3 LUB OIL TEMPERATURE HIGH (0C)
45
65 - 2
1. 4 LUB OIL TEMPERATURE LOW (0C) 20 - 2
1. 5 LUB OIL SUMP TEMPERATURE HIGH (0C) 40 - 52 2
1. 6 LUB OIL SUMP LEVEL LOW - - TRIP 10
1. 7 LUB OIL PUMP NOT RUNNING - - TRIP 2
1. 8 FEEDER I/S AND LOSS OF PA FLOW (T/HR) > 28 - 10 NO TD
1. 9
IGNITION ENERGY NOT AVAILABLE
(REFER INTERLOCK)
- - TRIP 5
1. 10 MFT ACTED - - TRIP -
1. 11 MILL DISCHARGE GATES CLOSE (BYPASSED) - - TRIP 2
1. 12 SEAL AIR TO MILL DP LOW (MMWC) 300 - 125 60
1. 13 LOSS OF PA FAN / PRESSURE TRIP
850 675
BOTH PA FANS STOPPED
AND ANY ONE MILL
RUNNING
500 -
625 5
TRIP -
1. 14
PA HEADER PRESSURE LOW TRIP
(PA HDR PR < 675 mmwc AND ALL MILL I/S)
MILL-C
TRIP
5 SEC
1. 15 BURNER MANUAL ISOLATION VALVE CLOSED (BYPASSED) - - TRIP -
1. 16
FD OR BFP TRIPPING RUNBACK:
ALL MILLS RUNNING AND (ONE FD FAN RUNNING OR
ATLEAST TWO BFP’s NOT RUNNING)
- - MILL-C
1. 17 EMERGENCY PB OPERATED TRIP
1. 18 LOSS OF PA FAN RUNBACK TRIP
IF 3 MILLS I/S
MILL-C -
MILL-B 2 SEC
IF MILLS-AB/AC/BC I/S TOP MILL -
1. 19
LOSS OF PULVERIZER TRIP
(FEEDER RUNNING AND PULV STOPPED/ RUNNING FB LOST)
TRIP 1 SEC
16. TOP MILL TRIPPING ON GEN BKR OPEN SIGNAL:
TOP MILL WILL TRIP IF (GEN ACTIVE POWER > 3
MW AND GEN BREAKER OPEN (10 SEC PULSE))
AND ANY OF THE FOLLOWING CONDITION EXISTS
• ANY TWO MILLS RUNNING AND 2 ELEVATIONS
IN SERVICE
• 3 MILLS IN SERVICE AND NO COREX IN SERVICE
• 3 MILLS IN SERVICE AND COREX X1 ELEVATION
IN SERVICE
17. LOS PANEL LOGICS
LUB OIL PUMP WILL START IF ALL THE FOLLOWING CONDITIONS ARE SATISFIED:
• LUB OIL LEVEL ADEQUATE (TD 10SEC)
• SUMP OIL TEMP ADEQUATE 15OC
• LOP START (LOCAL SWITCH OR LOP START PB FROM BMS)-BYPASSED
LUB OIL PUMP WILL STOP IF PULVERISER IS OFF FOR MORE THAN 5 MINUTES AND
NO CONTACT OF CRL34 EXISTS AND ANY OF THE FOLLOWING CONDITIONS ARE
SATISFIED:
• LUB OIL LEVEL VERY LOW (TD 10 SEC)
• SUMP OIL TEMP NOT ADEQUATE
• LOP ON AND LUB OIL PRESSURE VERY LOW (TD 10 SEC)
LUB OIL SYSTEM HEALTHY IF LOP IS ON AND ALL THE FOLLOWING CONDITIONS
EXISTS:
• LUB OIL PRESSURE NOT VERY LOW 1.2 KSC (TD 60 SEC)
• SUMP OIL TEMP ADEQUATE 15OC
• LUB OIL LEVEL ADEQUATE (TD 10 SEC)
• LUB OIL DISCHARGE FILTER CLEAR 0.6 KSC
LUB OIL SYSTEM FAILED IF ANY OF THE FOLLOWING CONDITIONS EXISTS:
• IF PULVERISER IS ON AND
• LOP NOT ON FOR 2 SEC OR SUMP OIL TEMP NOT ADEQUATE (TD 1 HOUR)
• LOSS OF A.C POWER AT PLOS PANEL FOR > 2 SEC
• LUB OIL LEVEL VERY LOW (TD 10 SEC)
• LOP ON AND LUB OIL PRESSURE VERY LOW (TD 10 SEC)
18. RAW COAL FEEDER
• PERMISSIVES
• MILL RUNNING (30 SEC TIME DELAY)
• FEEDER SPEED DEMAND AT MINIMUM AND FEEDER NOT RT
• FEEDER IN REMOTE
• COAL FIRING PERMISSIVE SATISFIED
• PA FLOW ABOVE MINIMUM >10 T/Hr
• BUNKER OUTLET GATE OPEN
• FEEDER INLET GATE OPEN
• FEEDER TRIP RESET
• MILL MOTOR NOT OVER LOADED
• MILL GROUP READY AND GROUP SEQUENCE STARTED
• IF MILL GROUP SEQUENCE IN AUTO AND FEEDER IN AUTO AND HOT AIR
GATE OPEN
• NO BOILER TRIP
19. PROTECTION
• LOSS OF COAL ON BELT (TIME DELAY 5 SEC.)
• SHEAR PIN FAIL
• MFT ACTED
• MILL MAIN MOTOR OFF
6.0 - AIR PRE HEATER
PERMISSIVE (ELE / AIR MOTOR)
• APH GUIDE BEARING TEMP NOT HIGH (<700C)
• APH SUPPORT BEARING TEMP NOT HIGH (<700C)
INTERLOCKS
• AIR MOTOR STARTS (SOLENOID VALVE DE-ENERGISES) WHEN ELE.
MOTOR TRIPS.
• AIR MOTOR STOPS (SOLENOID VALVE ENERGISES) WHEN ELECTRICAL
MOTOR STARTS.
• SUPPORT / GUIDE BRG LOP STARTS WHEN APH ELEC MOTOR / AIR MOTOR
ON AND APH GUIDE / SUPPORT BRG TEMP > 400C
• SUPPORT / GUIDE BRG LOP STOPS WHEN APH BRG TEMP < 400C
• STAND BY LOP WILL START WHEN AUTO START COMMAND IS PERSISTING
FOR MAIN LOP FOR 2 SEC. AND THE MAIN LOP IS NOT ON OR IF THE
RUNNING LOP TRIPS
20. AIR PRE-HEATER DAMPERS
FLUEGAS, SA & PA INLET/OUTLET DAMPER
• AUTO OPEN
• APH ELECTRIC / AIR MOTOR NOT ON AND
OTHER APH ELECTRIC / AIR MOTOR NOT ON
• AUTO CLOSE
• APH ELECTRIC / AIR MOTOR NOT ON AND
OTHER APH ELECTRIC / AIR MOTOR ON
• OPERATION OF INLET & OUTLET DAMPERS OF APH
(FOR AIR & FLUE GAS PATH)
• FAN SIDE DAMPER SHOULD BE OPEN, FOR OPENING
THE BOILER SIDE DAMPER
• BOILER SIDE DAMPER SHOULD BE CLOSED FOR
CLOSING FAN SIDE DAMPER
21. BURNER MANAGEMENT SYSTEM
PURGE PERMISSIVES
• ALL NOZZLE VALVES, IGNITOR VALVES CLOSED.
• LOTV, HOTV, COREX GAS TV & IGTV CLOSED.
• ALL SCANNER SENSE NO FLAME (ALL ELEVATION ¾ SCANNERS SHOWS NO
FLAME)
• BC 2/4SCANNER FLAME NOT ON
• AB 2/4SCANNER FLAME NOT ON
• AX1 2/4SCANNER FLAME NOT ON
• X1 2/4SCANNER FLAME NOT ON
• X3 2/4SCANNER FLAME NOT ON
• NO IGNITION FROM AX1 AND BC CORNERS
• NO DISCRIMINTING SCANNER FLAME ON
• ALL FEEDERS OFF
• BOTH PA FANS OFF
• MILLS A, B & C HOT AIR GATES CLOSED AND ACFS HOT AIR GATE CLOSED
• IGNITOR GAS & COREX GAS VENT VALVES OPEN
• ALL AUXLIARY DAMPERS MODULATING
• ELEVATION A, B, C AND XX OUT OF FOUR ELEVATION >/=TWO ELEVATIONS
SHOULD BE MODULATING
22. • CC, BC, AB, AX1, X1, X2, X3 OUT SEVEN ELEVATIONS >/= FIVE ELEVATIONS SHOULD BE
MODULATING
• OR
• ELEVATIONS A, B, C AND XX OUT OF FOUR ELEVATION >/=TWO ELEVATIONS CONTROL STATION
OUT PUT COMMAND SHOULD BE >8%
• CC, BC, AB, AX1, X1, X2, X3 OUT SEVEN ELEVATIONS >/= FIVE ELEVATIONS CONTROL STATION
OUT PUT COMMAND SHOULD BE >8%
UNIT AIR FLOW GREATER THAN 40%(190 TPH)
• NO BOILER TRIP
• DRUM LEVEL VERY LOW FOR MORE THAN 5 SECONDS
• DRUM LEVEL VERY HIGH FOR MORE THAN 10 SECONDS
• FURNACE PRESSURE VERY LOW (2/3 LOGIC)
• FURNACE PRESSURE VERY HIGH (2/3 LOGIC)
• TOTAL AIR FLOW LESS THAN 40%
• BOTH ID FANS OFF
• BOTH FD FANS OFF
• LOSS OF REHEATER PROTECTION
• UNIT FLAME FAILURE TRIP
• LOSS OF ALL FUEL TRIP
• LOSS OF 220V DC MFT POWER, FOR MORE THAN 2 SEC.
• CRITICAL I/O MODULE FAIL
• EMERGENCY TRIP SWITCH ACTIVATED
• SPARE MFT TRIP
• 11.ANY ID FAN AND FD FAN RUNNING
• 12.CRITICAL IN PUT /OUT PUT MODULES FOR OIL GAS AND COAL ARE IN GOOD QUALITY
23. FUEL OIL VALVES
• PERMISSIVES
• LOTV OPENS ONLY IF ALL THE FOLLOWING CONDITION PERSISTS
• NO MFT ACTIVE
• LFO SUPPLY PRESSURE ADEQUATE (HJF60CP101)>6 Ksc
• ELEVATION AX1 ALL LFO VALVES CLOSED
• LOTV TRIP CONDITIONS DOES NOT EXIST
• LFO TRIP VALVES NOT RED TAGGED
• LFO TRIP VALVE CLOSE FEED BACK EXIST
• LFO BOTH HEADER PT’S NOT IN BADQUALITY
• ATOMIZING AIR PT NOT IN BADQUALITY (HJN10CP101)
• MODULE STATUS OK
• HOTV OPENS ONLY IF ALL THE FOLLOWING CONDITION PERSISTS
• NO MFT ACTIVE
• HOTV CLOSED
• ATOMIZING STEAM HEADER PT NOT BADQULITY
• HFO HEADER PT’S NOT BAD QULITY
• SLAVE MADULE STATUS OK
• HO SUPPLY PRESSURE ADEQUATE >=8 Ksc (HJF40CP102)
• ALL HO NOZZLE VALVES CLOSED
• HO SUPPLY TEMPERATURE ADEQUATE >=100 DEG C (HJF30CT101)
24. •HO RETURN TRIP VALVE OPEN
• HO TRIP VALVE CLOSE COMMAND NOT EXISTS
• HOTV NOT RED TAGGED
HORV OPENS ONLY IF ALL FOLLOWING CONDITION PERSIST
HO RETURN TRIP VALVE OPEN PUSHBUTTON PRESSED
• ALL HO NOZZLE VALVES CLOSED
IGNITOR TRIP VALVE OPENS ONLY IF THE FALLOWING CONDITIONS PERSISTNO MFT
ACTIVE
• IGTV IN CLOSE CONDTION
• ALL IGNITOR VALVES OF AX1 AND BC CLOSED
• IGNITOR GAS SUPPLY PRESSURE ADEQUATE>=0.75 KSC (SFA20CP101)
• IGNITOR TRIP VALVE TRIP CONDITION NOT EXISTS
• IGTV NOT RED TAGGED AND CLOSED
• BOTH PRESSURE TRANSMITTERS ARE GOOD QUALITY
•SLAVE MODULE GOOD QUALITY
IGNITOR FIRING PERMISSIVE
• AL TRIP CLEAR AND 1 MINUTE TIMED OUT
• MFT RELAY RESET
• IGTV OPEN
• IGNITOR SUPPLY PRESSURE >MIN
• IGNITOR SUPPLY PRESSURE <MAX
• EITHER IGNITOR FAN RUNNING OR IGNITOR TO FURNACE DP NORMAL (>MIN
80MMWC)
25. • PROTECTIONS
HOTV CLOSES IF ANY OF THE FOLLOWING CONDITION PERSISTS.
• TEMPERATURE OF HFO IS VERY LOW (HJF40CT102)<=90 0C AND ALL HONV’S NOT CLOSED AND HO RTV
NOT OPENED
• PRESSURE OF HFO IS VERY LOW (2.5 KSC)(HJF40CP102/3/4) AND ALL HONV NOT CLOSED INITIAL TIME
DELAY 32 SEC NORMAL TIME DELAY IS 2 SEC
• ANY HONV NOT CLOSED ON NO FLAME DETECTED AFTER IGNITION PROVEN (TIME DELAY IS 20SEC) AND
ANY BURNER VALVE FAIL TO CLOSE
• ATOMISING STEAM PRESSURE VERY LOW (3.0 KSC (HJF60CP101/2/3) & 5 SEC TIME DELAY) AND
ALLHONV NOT CLOSED AND NO HO ELEVATION IN START/STOP>90 SEC AND HORTV NOT OPEN,
• MFT ACTS AND HFO RETURN TRIP VALVE NOT OPEN
• VALVE FAILED TO OPEN WITH IN 10 SEC
• VALVE FAILED TO CLOSE WITH IN 10 SEC
• NO FAULT IN HOTV FACE PLATE
• VALVE LIMIT SWITCH MISS MATCH
• HO PRESSURE BAD QUALITY
• ATOMIZING STEAM PT BAD QUALITY
• LOSS OF UNIT LOGIC POWER SUPPLY
LOTV CLOSES IF ANY OF THE FOLLOWING CONDITION PERSISTS
• LFO HEADER PRESSURE LOW (2.0 KSC) AFTER OPENING OF LOTV 32 SEC TIME DELAY
• ATOMISING AIR PRESSURE VERY LOW TRIP (2.5 KSC & 5 SEC TIME DELAY), PROVIDED ANY OF LONV IS
OPEN AND ATOMIZING AIR PRESSURE LOW AND NO LFO ELEVATION IN START /STOP FOR >70 SEC
• VALVE FAILED TO CLOSE WITH IN 10 SEC AFTER GIVING CLOSE COMMAND (LOTV TRIPPED)
• VALVE FAILED TO OPEN WITH IN 10 SEC AFTER GIVING OPEN COMMAND (LOTV TRIPPED)
• NO FAULT LOTV FACE PLATE
26. • ANY LONV NOT CLOSED ON NO FLAME DETECTED AFTER IGNITION PROVEN
(TIME DELAY IS 20SEC AND ANY BURNER VALVE FAIL TO CLOSE)
• BOTH LFO HEADER PT’S BADQUALITY
• BOTH ATOMINZING AIR PT BAD QUALITY
• IGNITOR BURNER VALVE FAILED TO CLOSE MORE THAN 20 SEC AFTER FLAME
FAILURE
• LOSS OF UNIT LOGIC POWER SUPPLY
• MFT ACTIVE
IGNITOR TRIP VALVE LOGIC
IGNITOR TRIP VALVE CLOSES IF ANY OF THE FOLLOWING CONDITION EXISTS
• BOILER TRIP (MFT)
• IGNITOR GAS PRESSURE VERY LOW (0.2 KSC)(SFA20CP102) / HIGH (40 KSC)
(SFA20CP101) PROVIDED ANY OF IGNITOR BURNER VALVES NOT CLOSED FOR
MORE THAN 2 SEC.
• IGNITOR BURNER VALVE AX1/BC FAILED TO CLOSE MORE THAN 20 SEC. AFTER
SENSING NO FLAME AND ANY BURNER VALVE FAIL TO CLOSE
• VALVE FAILED TO OPEN WITH IN 10 SEC
• VALVE FAILED TO CLOSE WITH IN 10 SEC
• IGNITOR GAS PRESSURE TRANSMITTER BAD QUALITY
• LOSS OF UNIT LOGIC POWER SUPPLY
NO TIME DELAY IS THERE FOR IGNITOR HEADER VENT VALVE CLOSING AFTER TRIP
VALVE OPENING
FOR ALL OIL BURNERS, WHILE SCAVENGING IGNITOR VALVE OPEN TIME IS 45 SEC
27. OIL BURNER SEQUENCE.
ON START COMMAND FOR ANY PAIR
• IGNITOR CORNER VALVE OPENS PROVIDED IGNITOR NO FLAME PERSIST AND
IGNITOR FIRING PERMISSIVE SATISFIED AND START COMMAND GIVEN.
• PAIR START WILL INITIATE ELECTRIC SPARK FOR 10 SEC WITH IN 10 SEC IGNITOR
HAS TO BE PROVEN (IONIC FLAME MONITOR DETECTS THE FLAME AND IGNITOR
FLOW IS ADEQUATE)
• IF IGNITOR PROVEN, ATOMISING AIR / STEAM VALVE OPENS (2-3 SEC). THEN OIL
VALVE OPENS (2-3 SEC).
• IF SCANNER SENSES FLAME BEFORE 70 SEC, GUN STABLISES.
• IGNITOR STAYS FOR 70 SEC FROM INSTANT OF START COMMAND.
• IGNITOR CORNER VAVLE STOP/CLOSE WILL BE INITIATED AFTER CORNER OIL
NOZZLE VALVE OPEN (BURNER START TRIAL COMPLETION) WITH 15 SEC TIME
DELAY
• IGNITOR IS ALSO BROUGHT DURING SCAVENGING OR THE ASSOCIATED
ELEVATION BURNERS HAVE PLANNED SHUT DOWN OR STOP COMMAND
ATOMIZING AIR/STEAM VALVE OPEN
• LFO/HFO SELECTED
• ASSOCIATED CORNER IGNITOR TRIAL TIME COMPLETED
• OIL GUN ENGAGE
• SCAVENGING VALVE SHOULD BE CLOSED CONDITION
• START MEMORY PERSISTING
28. BURNER IN SERVICE WILL COME
• LFO/HFO SELECTED
• OIL START MEMORY
.
• ONCE OIL VALVE FULL OPENS AND 15 SEC ELAPSED AND WITH IN THIS
PERIOD OIL FLAME DETECTED FROM MAIN FLAME SCANNE
UNIT FLAME FAILURE
• THE PROTECTION GETS ARMED WHEN ANY OF THE FOLLOWING
CONDITION PERSISTS FOR > 2 SEC.
• ANY COAL FEEDER PROVEN
• AX1 OR BC OIL ELEVATION ¾ NOZZLE VALVES OPEN WITH HFO & HFO
PRESSURE > 4 KSC
• COREX X1 (2/4) / X2 (3/4) / X3 (3/4) GAS BURNERS IN SERVICE AND
COREX GAS PRESSURE > 30% (100 MMWC)
• WHEN ALL THE ELEVATIONS VOTED TOGETHER FOR NO FLAME FAILURE
TRIP OCCURS
ELEVATION VOTING
• ELEVATION C VOTES WHEN ANY OF THE FOLLOWING CONDITION
PERSISTS
• FEEDER C NOT PROVEN FOR > 2SEC OR SIGNAL BADQUALITY
. AND BC
ELEVATION (3/4 NOZZLE VALVE NOT OPEN) OIL NOT IN SERVICE OR
SIGNAL BADQUALITY
• BC ELEVATION 2/4 SCANNER SHOWS NO FLAME AND BC ELEVATION (3/4
NOZZLE VALVE NOT OPEN) OIL NOT IN SERVICE OR SIGNAL BADQULITY
.
29. ELEVATION B VOTES WHEN ANY OF THE FOLLOWING CONDITION PERSISTS
• FEEDER B NOT PROVEN FOR > 2 SEC OR SIGNAL BADQULITY
. AND BC ELEVATION
(¾ NOZZLE VALVE NOT OPEN) OIL NOT IN SERVICE OR SIGNAL BADQULITY
• AB ELEVATION 2/4 SCANNER SHOWS NO FLAME AND ELEVATION BC 2/4
SCANNER SHOWS NO FLAME AND BC ELEVATION (¾ NOZZLE VALVE NOT OPEN)
OIL NOT IN SERVICE OR SIGNAL BADQUALITY
ELEVATION A VOTES WHEN ANY OF THE FOLLOWING CONDITION PERSISTS
• FEEDER A NOT PROVEN FOR >2 SEC OR SIGNAL BADQULITY
. AND AX1 ELEVATION
(¾ NOZZLE VALVE NOT OPEN) OIL NOT IN SERVICE AND AX1 HFO SELECTED.
• AB ELEVATION 2/4 SCANNER SHOWS NO FLAME AND ELEVATION AX1 2/4
SCANNERS SENSE NO FLAME AND AX1 ELEVATION (¾ NOZZLE VALVE NOT OPEN)
OIL NOT IN SERVICE.
ELEVATION X1 VOTES WHEN ANY OF THE FOLLOWING CONDITION PERSISTS
• ELEVATION X1 NOT IN SERVICE 2/4 AND AX1 ELEVATION (¾ NOZZLE VALVE NOT
OPEN) OIL NOT IN SERVICE OR SIGNAL BADQUALITY
.
• ELEVATION AX1 2/4 SCANNER SHOWS NO FLAME AND AX1 ELEVATION (¾ NOZZLE
VALVE NOT OPEN) OIL NOT IN SERVICE OR SIGNAL BADQUALITY AND X1 2/4
SCANNER SHOWS NO FLAME.
ELEVATION X2 VOTE WHEN ANY OF THE FOLLOWING CONDITION PERSISTS
• X2 ELEVATION NOT IN SERVICE OR X1 ELEVATION 2/4 SCANNER SHOWS NO
FLAME AND ELEVATION X3 2/4 SCANNER SHOWS NO FLAME.
ELEVATION X3 VOTE WHEN ANY OF THE FOLLOWING CONDITION PERSISTS
• WHEN X3 2/4 SCANNER SHOWS NO FLAME OR X3 ELEVATION NOT IN SERVICE.
•
30. LOSS OF ALL FUEL.
• THE PROTECTION GETS ARMED WHEN ANY IGNITOR AT ANY ELEVATION GETS PROVEN.
• BOILER WILL TRIP ON LOSS OF ALL FUEL WHEN ALL THE FOLLOWING CONDITION PERSISTS
• ALL COREX NOZZELS VALVE CLOSED/TRIPPED
• AX1 AND BC ELEVATION ALL HONV CLOSED/TRIPPED
• ALL FEEDERS OFF/TRIPPED
• AX1 ELEVATION ALL LONV CLOSED/TRIPPED
• ALL IGNITOR VALVE CLOSED/TRIPPED OR IGTV NOT OPEN/TRIPPED
REHEATER PROTECTION
THIS PROTECTION GETS ARMED, WHEN ANY OF THE FOLLOWING CONDITION EXISTS
• ANY FEEDER PROVEN.
• ANY COREX BURNER PROVEN
• AX1>/=3/4 WITH HFO
• AX1 4/4 WITH LFO +BC>/=1/4
• BC >/= 3/4 WITH HFO
• AX1= 2 WITH LFO +BC=/>1
• AX1=/>1 WITH LFO+BC=/>2
• AX1=/>1 WITH HFO+BC=/>2
BOILER WILL TRIP ON THIS PROTECTION WHEN ANY OF THE FOLLOWING CONDITION PERSISTS FOR 10 SEC.
• GCB OPENS AND HPBP CV < 2% OPEN.
• BOTH LPBP CVS < 2% OPEN.
• BOTH LPBP STOP VALVES CLOSED.
• BOTH MAIN STEAM VALVES (BOILER) ARE CLOSED.
31. LESS THAN FIRE BALL & LOSS OF A.C. (NOT INCLUDED AT PRESENT)
• BOILER WILL TRIP ON THIS PROTECTION WHEN ALL THE FOLLOWING
CONDITION PERSISTS
• ANY ELEVATION (AX1, BC, A, B, C, X1, X2, X3) STARTED & LOSS OF AC
POWER FOR 2 SEC
• ALL FEEDERS OFF
• AX1 OR BC ELEVATION NOT IN SERVICE {ELEVATION IN SERVICE
MEANS ¾ HFO NOZZLE VALVES OPEN AND HFO PRESSURE > 30%}
IGNITOR AIR FAN
• START PERMISSIVE
• FAN NOT OUT OF SERVICE
• FAN NOT RED TAGGED
• IGNITOR TO FURNACE <75 MMWC
• OTHER FAN FAIL TO START
• OTHER FAN FAIL TO STOP
•
•
•
STOP PERMISSIVE
IGNITOR TO FURNACE DP >75 MMWC AND OPERATOR STOP
COMMAND
• EMERGENCY STOP FROM LOCAL
32. SCANNER AIR FAN
• START PERMISSIVE
• FAN NOT OUT OF SERVICE
• SCANNER TO FURNACE DP<150MMWC
• OTHER FAN FAIL TO START
•
•
•
•
STOP PERMISSIVE
STOP FROM DCS AND F SCANNER TO FURNACE DP>150 MMWC
SCANNER FAN DISCHARGE PR LOW 230MMWC AND SCANNER TO
FURNACE DP LOW 220MMWC
• SCANNER AIR FAN EMERGENCY DAMPER
• OPEN PERMISSIVE
• BOTH FD FANS OFF
• CLOSE PERMISSIVE
• ANY FD FAN RUNNING
•
33. ADDITIONAL COAL FIRING SYSTEM
(ACFS)
ACFS PAV’S PERMISSIVES.
• ALL MDV’S CLOSED.
• ALL BIV’S OPENED.
• ADJACENT IGNITION ENERGY PROVEN.
• ELEVATION SELECTED FOR ACFS.
• FURNACE FIRING PERMISSIVE SATISFIED.
• FD FAN RELEASE.
• UNSELECTED ELEVATION PAV’S NOT OPEN.
• ACFS COLD AIR GATE OPEN.
ACFS HOT AIR GATE PERMISSIVES:
• ANY ONE-ELEVATION PAV’S FULL OPEN.
• HOT AIR GATE CLOSED.
• HOT AIR GATE NOT RED TAGGED.
ACFS CIV’S PERMISSIVES:
• ALL PAV’S OPENED.
34. • UNSELECTED ELEVATION CIV’S FULL CLOSED.
• ACFS PA FLOW ADEQUATE.
• ACFS PA HEADER TEMP NOT HIGH.
ACFS COMPRESSOR PERMISSIVES:
•
• DIV-1 OPEN TO GROUP A/C.
• CONVEYING GROUP TRIP RESET.
• COMPRESSOR TROUBLE RESET.
• DIV-A & B OPEN TO SELECTED ELEVATION.
• ALL CIV’S OF SELECTED ELEVATION OPEN.
• ANY ONE ELEVATION SELECTED FOR ACFS.
• MFT RELAYS RESET.
•
ACFS PS PUMP PERMISSIVES:
•
• COMPRESSOR RUNNING.
• COMPRESSOR DISCHARGE PRESSURE ADEQUATE.
• CONVEYING GROUP TRIP RESET.
• PS PUMP DISCHARGE PRESSURE NOT VERY HIGH.
•
ACFS RAL PERMISSIVES:
•
• PS PUMP RUNNING.
• COMPRESSOR DISCHARGE PRESSURE ADEQUATE.
• PS PUMP DISCHARGE PRESSURE NOT VERY HIGH.
• CONVEYING GROUP TRIP RESET.
•
35. ACFS BAG HOUSE FAN PERMISSIVES:
ON STARTING OF ANY PS PUMP
, BAG HOUSE BLOWER WILL START IN
AUTO AND CORRESPONDING KGV WILL OPEN AFTER 15 SEC OF
BLOWER RUNNING.
BAG HOUSE BLOWER WILL STOP IN AUTO AFTER BOTH RAL STOPPING
AND KGVS WILL CLOSE AFTER BLOWER STOP
.
ACFS CONVEYING GROUP EMERGENCY TRIPS:
• LOSS OF COMPRESSOR TRIP
.
• LOSS OF ACFS PA FLOW TRIP
.
• ACFS SELECTED ELEVATION MDV OPEN TRIP
.
• ACFS SELECTED ELEVATION MMV OPEN TRIP [BYPASSED]
• ACFS LOSS OF IGNITION ENERGY TRIP
.
• ACFS SELECTED ELEVATION DIV CLOSE TRIP
.
• ACFS LOSS OF PA FAN / PRESSURE TRIP
.
• BOILER TRIP – ACFS.
• ACFS SLAVE BAD QUALITY TRIP
.
36. SECONDARY AIR DAMPER CONTROL
• WIND BOX DP (MMWC) CONTROL SET POINT
WILL BE GENERATED AS PER REQIREMENT
DAMPER OPERATION:
XX ELEVATION:
• MODULATE TO MAITAIN WIND BOX TO
FURNACE DP AS PER ABOVE CURVE (TABLE)
• CLOSE WHEN BOILER LOAD >30%AND X3 NO
BURNERS IN SERVICE
• OPEN FULL WHEN WB TO FURNACE DP GOES
>THAN 240MMWC AND RESET AT 175MMWC
• OPEN FULL ON MFT (BOILER TRIP OR BOTH FD
OFF OR BOTH ID OFF)
37. AB ELEVATION:
• MODULATE TO MAITAIN WIND BOX TO FURNACE DP AS PER ABOVE CURVE (TABLE)
• CLOSE WHEN BOILER LOAD >30%AND MILL-A/ACFS PAV’S NOT OPEN FOR MILL-A AND
MILL-B/ACFS PAV’S NOT OPEN NOT OPEN FOR MILL-B
• OPEN FULL WHEN WB TO FURNACE DP GOES >THAN 175MMWC AND RESET AT
125MMWC
•OPEN FULL ON MFT (BOILER TRIP OR BOTH FD OFF OR BOTH ID OFF) CC
ELEVATION:
• MODULATE TO MAITAIN WIND BOX TO FURNACE DP AS PER ABOVE CURVE (TABLE)
• CLOSE WHEN BOILER LOAD >30%AND MILL- C NOT IN SERVICE /ACFS PAV’S NOT OPEN
FOR MILL-C
• OPEN FULL WHEN WB TO FURNACE DP GOES >THAN 175MMWC AND RESET AT
125MMWC
• OPEN FULL ON MFT (BOILER TRIP OR BOTH FD OFF OR BOTH ID OFF)
X1 ELEVATION:
• MODULATE TO MAITAIN WIND BOX TO FURNACE DP AS PER ABOVE CURVE (TABLE)
• CLOSE WHEN BOILER LOAD >30% AND AX1, X1 AND X2 NO BURNERS IN SERVICE
• OPENING PROPORTINAL TO COREX C-HEADER PRESSURE (180MMWC TO 600MMWC
SADC WILL OPERATE 30% TO 100%)WHEN X1 IN SERVICE
•OPEN FULL ON MFT (BOILER TRIP OR BOTH FD OFF OR BOTH ID OFF) X2
ELEVATION:
• MODULATE TO MAITAIN WIND BOX TO FURNACE DP AS PER ABOVE CURVE (TABLE)
• CLOSE WHEN BOILER LOAD >30% AND AX1, X1AND X3 NO BURNERS IN SERVICE
• OPENING PROPORTINAL TO COREX C-HEADER PRESSURE (180MMWC TO 600MMWC
SADC WILL OPERATE 30% TO 100%)WHEN X2 IN SERVICE
• OPEN FULL ON MFT (BOILER TRIP OR BOTH FD OFF OR BOTH ID OFF)
38. X3 ELEVATION:
• MODULATE TO MAITAIN WIND BOX TO FURNACE DP AS PER ABOVE CURVE (TABLE)
• CLOSE WHEN BOILER LOAD >30% AND X2 AND X3 NO BURNERS IN SERVICE
• OPENING PROPORTINAL TO COREX C-HEADER PRESSURE (180MMWC TO 600MMWC SADC WILL
OPERATE 30% TO 100%)WHEN X3 IN SERVICE
• OPEN FULL ON MFT (BOILER TRIP OR BOTH FD OFF OR BOTH ID OFF)
•
A ELEVATION:
• MODULATE TO MAINTAIN WIND BOX TO FURNACE DP AS PER ABOVE CURVE (TABLE)
• OPENING PRAPORTIONAL TO ELEVATION FEED RATE FROM 20 TO 70%
• CLOSE WHEN THE BOILER LOAD >30% AND AX1 AND A NOT IN SERVICE
• OPENS FULL ON MFT
•
B ELEVATION:
• MODULATE TO MAINTAIN WIND BOX TO FURNACE DP AS PER ABOVE CURVE (TABLE)
• OPENING PRAPORTIONAL TO ELEVATION FEED RATE FROM 20 TO 70%
• CLOSE WHEN THE BOILER LOAD >30% AND BC OR B NOT IN SERVICE
• OPENS FULL ON MFT
•
C ELEVATION:
• MODULATE TO MAINTAIN WIND BOX TO FURNACE DP AS PER ABOVE CURVE (TABLE)
• OPENING PRAPORTIONAL TO ELEVATION FEED RATE FROM 20 TO 70%
• CLOSE WHEN THE BOILER LOAD >30% AND BC OR C NOT IN SERVICE
• OPENS FULL ON MFT
•
• AFTER 40 SEC OF MFT ALL THE DAMPERS TO AUTOMATICALLY MODULATE TO MAINTAIN 40
MMWC WIND BOX PRESSURE