This document describes a project to automate the manual polymer mixing process in a water treatment plant using a Programmable Logic Controller (PLC). The goals are to improve accuracy, reduce errors and costs. It involves designing a system using an Omron CP1E PLC to control water intake, polymer dosing and mixing based on tank level sensors. The system is tested through jar tests and simulations to determine optimal coagulant and polymer dosages to meet water quality standards. Results show the automated system using a PLC improves process performance over the manual method.
Summer Internship Report For PLC Programming of Traffic light through Ladder ...Aman Gupta
For free download Subscribe to https://www.youtube.com/channel/UCTfiZ8qwZ_8_vTjxeCB037w and Follow https://www.instagram.com/fitrit_2405/ then please contact +91-9045839849 over WhatsApp.
An industrial PLCs system is used for the development of the controls of machinery. This paper describes the PLCs systems in terms of their architecture, their interface to the process hardware, the functionality and the application development facilities they provide. Some attention is also paid to the industrial standards to which they abide their planned evolution as well as the potential benefits of their use. Ladder Logic is a graphical programming language, initially programmed with simple contacts that simulates the opening and closing of relays. Ladder Logic programming has been expanded to include functions such as Counters, Timers, shift Registers and math operations. Ladder logic is a method of drawing electrical logic schematics. It is now a graphical language very popular for programming Programmable Logic Controllers (PLCs). It was originally invented to describe logic made from relays. The name is based on the observation that programs in this language resemble ladders, with two vertical "rails" and a series of horizontal "rungs" between them.
Summer Internship Report For PLC Programming of Traffic light through Ladder ...Aman Gupta
For free download Subscribe to https://www.youtube.com/channel/UCTfiZ8qwZ_8_vTjxeCB037w and Follow https://www.instagram.com/fitrit_2405/ then please contact +91-9045839849 over WhatsApp.
An industrial PLCs system is used for the development of the controls of machinery. This paper describes the PLCs systems in terms of their architecture, their interface to the process hardware, the functionality and the application development facilities they provide. Some attention is also paid to the industrial standards to which they abide their planned evolution as well as the potential benefits of their use. Ladder Logic is a graphical programming language, initially programmed with simple contacts that simulates the opening and closing of relays. Ladder Logic programming has been expanded to include functions such as Counters, Timers, shift Registers and math operations. Ladder logic is a method of drawing electrical logic schematics. It is now a graphical language very popular for programming Programmable Logic Controllers (PLCs). It was originally invented to describe logic made from relays. The name is based on the observation that programs in this language resemble ladders, with two vertical "rails" and a series of horizontal "rungs" between them.
PowerPoint Presentation on Industrial Automation In which we discuss About PLCs, SCADA,HMI,VFD and various tools of Automation which is used in Industries.
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The project is based upon closed loop control system.
A Closed-loop Control System, also known as a feedback control system is a control system which uses the concept of an open loop system as its forward path but has one or more feedback loops (hence its name) or paths between its output and its input.
The reference to “feedback”, simply means that some portion of the output is returned “back” to the input to form part of the systems excitation.
The aim of this project is to design a micro controller Based automatic bottle filling system that sense the presence of bottle and fills it accordingly up to a fixed level.
PowerPoint Presentation on Industrial Automation In which we discuss About PLCs, SCADA,HMI,VFD and various tools of Automation which is used in Industries.
Like Comment & Share
The project is based upon closed loop control system.
A Closed-loop Control System, also known as a feedback control system is a control system which uses the concept of an open loop system as its forward path but has one or more feedback loops (hence its name) or paths between its output and its input.
The reference to “feedback”, simply means that some portion of the output is returned “back” to the input to form part of the systems excitation.
The aim of this project is to design a micro controller Based automatic bottle filling system that sense the presence of bottle and fills it accordingly up to a fixed level.
Plc based Robotic Arm and Automated Different Size Bottle Filling SystemRehan Fazal
Well this was going to be our final year project but it got rejected after being accepted by panel members in zeroth review by our HOD mam.
If u want to do this project or use the idea of this project seriously after getting all your formalities done, you can contact me. I will help you in getting all your IEEE papers and relevant papers to this project.
The reason behind sharing this is that I spend my whole one semester for studying theory part of it, and i was unable to do this but i really want someone to do this project.
COLLUSION-TOLERABLE PRIVACY-PRESERVING SUM AND PRODUCT CALCULATION WITHOUT SE...nexgentechnology
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Mobile: 9751442511,9791938249
Telephone: 0413-2211159.
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Top 8 building administrator resume samplesmikenagy357
In this file, you can ref resume materials for building administrator such as building administrator resume samples, building administrator resume writing tips, building administrator cover letters, building administrator interview questions with answers…
A presentation on the topic Automatic Bottling System using Arduino 2560 Mega Micro Controller for small scale industry based bottle filling applications.
Development of an automatic can crusher using programmable logic controllerIJECEIAES
The invention of a can crusher machine in this project is to reduce the wasted storage space occupied by the tremendous amount of use aluminium can at the commercial establishment like in the restaurant, cafeteria and bar. Basically, can crusher machine be operated in manual effort and time in the can crushing process. Shrinking the initial volume of empty used-aluminium cans down to 50% in more effective, faster and effortless way, as well as to develop a low-cost device that is suitable for the small-industry usage are mainly the objectives for the Automatic Can Crusher, where an automated process is executed in Automatic Can Crusher due to the automation in the modern world is inevitable and nominal to be used. The Automatic Can Crusher is run by a Programmable Logic Controller (PLC) with the aid of an inductive and capacitive sensor, where it is applied to detect whether the object is metal or non-metal. Overall, the system can be controlled manually through the push start and stop button as well as using the Human Machine Interface (HMI) using NB-Designer, for displaying the total of cans being crushed per day. The average result of empty can could shrink from 31% to 60 % of the original value, by using the attuned and compatible pressure for this system.
Liquid Level and Photoelectric Sensors Based Automatic Liquid Mixing and Fill...ijtsrd
Today the application of PLC is more widely used in the digital world. There are many applications of PLC especially in the industrial. Normally, the PLCs that have been used at the industrial field are usually to control the machine or heavy machine in order to create an efficient production process. In this paper, a discussion about PLC application will be explained in more details and specified. A machine that uses to prepare automatic liquid mixing and filling machine system is controlled by Delta PLC which is also the heart of the entire system. The DVP 14SS2 from the Delta PLC types is used and WPL soft is used to write the ladder logic. The PLC can control many other electronic devices such as pump motor, level sensors, photoelectric sensor, conveyor belt, gear motor, solenoid valve, push buttons, relays and other devices. The main aim of the paper is to develop and test the real time implementation of PLC based liquid mixing and filling machine system. Firstly, start button is pushed. The liquids juice and water are mixed in the mixer tank by using valves. The level sensors know limited liquid levels and mixer motor starts stirring. The mixer motor is ON by timer. When the stirring process stops, the conveyor belt starts moving. When the cup passes photoelectric sensor, conveyor belt stops and then the pump motor fills the liquid mixture in the cup by timer. When the cup completes filling process, the pump motor closes and conveyor belt runs continuously. When another cup passes the photoelectric sensor, conveyor belt stops. Filling process operates again and again. Aye Aye Mar | Hay Man Oo | Kyawt Kyawt Hlaing "Liquid Level and Photoelectric Sensors Based Automatic Liquid Mixing and Filling Machine System using PLC" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-3 | Issue-5 , August 2019, URL: https://www.ijtsrd.com/papers/ijtsrd27835.pdfPaper URL: https://www.ijtsrd.com/engineering/electrical-engineering/27835/liquid-level-and-photoelectric-sensors-based-automatic-liquid-mixing-and-filling-machine-system-using-plc/aye-aye-mar
Effect of Different Defuzzification methods in a Fuzzy Based Liquid Flow cont...IJITCA Journal
Most of the process control technique is suffered by the complex dynamic systems with nonlinear or timevariable thats why it is very difficult to describe the behaviour of the system. One way to deal with the
uncertainty of the behaviour of the system is to use fuzzy logic.If Fuzzy logic was modelled on spontaneous human reasoning then it captures the impreciseness the most input data which are inherent. In a fuzzy logic controller the focus is the human operator's behaviour, whereas in conventional PID controller what is modeled is the system or process being controlled.FLC regulator has a very good result from complex
nonlinear dynamic processes, uses the reasoning of the human mind which is not always in the form of a
yes or no. In this work,it shows overall effective control and operation of the mechanical equipments applied for control of liquid flow, implemented the fuzzy liquid flow algorithm and compared the effect of
using different defuzzification methods.Flow control system takes information about sensor output voltage,
control valve opening & flows rate as parameters and controls in case of overflowing & wastage.In this design two input parameters: sensor output voltage and rate of change voltage and one output parameters: opening of the control valve .
Effect of Different Defuzzification methods in a Fuzzy Based Liquid Flow cont...IJITCA Journal
Most of the process control technique is suffered by the complex dynamic systems with nonlinear or timevariable
thats why it is very difficult to describe the behaviour of the system. One way to deal with the
uncertainty of the behaviour of the system is to use fuzzy logic.If Fuzzy logic was modelled on spontaneous
human reasoning then it captures the impreciseness the most input data which are inherent. In a fuzzy logic
controller the focus is the human operator's behaviour, whereas in conventional PID controller what is
modeled is the system or process being controlled.FLC regulator has a very good result from complex
nonlinear dynamic processes, uses the reasoning of the human mind which is not always in the form of a
yes or no. In this work,it shows overall effective control and operation of the mechanical equipments
applied for control of liquid flow, implemented the fuzzy liquid flow algorithm and compared the effect of
using different defuzzification methods.Flow control system takes information about sensor output voltage,
control valve opening & flows rate as parameters and controls in case of overflowing & wastage.In this
design two input parameters: sensor output voltage and rate of change voltage and one output
parameters: opening of the control valve .
Hyperglass Cleaning Project
1. Functional Design Specification of Hyperglass Cleaning is done.
2. Work Progress Report is shown which has Bill Of materials as well.
3.Autocad Design of whole process is Made. (Process Model, Power supply connections, PLC model, DI/Do module)
4.Ladder Logic design and SCADA design is also enclosed.
5. I/O mapping is done.
Hyperglass Cleaning Project
1. Functional Design Specification of Hyperglass Cleaning is done.
2. Work Progress Report is shown which has Bill Of materials as well.
3.Autocad Design of whole process is Made. (Process Model, Power supply connections, PLC model, DI/Do module)
4.Ladder Logic design and SCADA design is also enclosed.
5. I/O mapping is done.
Soft Computing Technique and Conventional Controller for Conical Tank Level C...ijeei-iaes
In many process industries the control of liquid level is mandatory. But the control of nonlinear process is difficult. Many process industries use conical tanks because of its non linear shape contributes better drainage for solid mixtures, slurries and viscous liquids. So, control of conical tank level is a challenging task due to its non-linearity and continually varying cross-section. This is due to relationship between controlled variable level and manipulated variable flow rate, which has a square root relationship. The main objective is to execute the suitable controller for conical tank system to maintain the desired level. System identification of the non-linear process is done using black box modelling and found to be first order plus dead time (FOPDT) model. In this paper it is proposed to obtain the mathematical modelling of a conical tank system and to study the system using block diagram after that soft computing technique like fuzzy and conventional controller is also used for the comparison.
Tank liquid level control using narma l2 and mpc controllersMustefa Jibril
Liquid level control is highly important in industrial applications such as boilers in nuclear power plants.
In this paper a simple liquid level tank is designed based on NARMA-L2 and Model Predictive control controllers.
The simple water level tank has one input, liquid flow inn and one output, liquid level. The proposed controllers is
compared in MATLAB and then simulated in Simulink to test how the system actual liquid level track the desired
liquid level with two input desired signals (step and white noise). The response of the NARMA-L2 controller is then
compared with a MPC controller. The results are shown sequentially and the effectiveness of the controller is
illustrated
Flow Control Using Variable Frequency Drive In Water Treatment Process of Dei...IJTET Journal
Abstract— Water scarcity is a major problem in the current scenario, so consumption of water should be reduced in industries.
The pulp and paper(P&P) industry is one of the heaviest users of water. Water is used in nearly every step of the manufacturing
process. To control the consumption of large amounts of fresh water in industries, water treatment process is important. This
project is done at Tamilnadu Newsprint and Papers Limited, Karur under the area of deinked pulp plant and the process of water
treatment. In water treatment process chemical dosage flow added should be correct according to the inlet flow. In our project
Variable Frequency Drive is used instead of control valve. According to the inlet flow induction motor speed is controlled by
using VFD, then chemical dosage flow, is controlled. The method of speed control used here is vector control. In this process by
using VFD, leakage of chemicals is minimised and the precise control of chemical dosage flow is improved.
In this paper, a Matlab based GUI and Propotinal Integral Dervative (PID) controller is designed to automatically regulate the flow-rate of the circulating fluid. When fluids are transported over long distances, the pressure and flow rate have to be monitored remotely in a control room. Using an HMI or Control Panels the flow rate can be increased or decreased to compensate for pressure drops or disturbances. This paper attempts to demonstrate such an Industrial Control Operation in a scaled-down environment. A Graphical User Interface or GUI is constructed which enables the Operator to monitor, as well as control an electronically actuated Control Valve which can efficiently regulate the flow-rate. Automatic operations have also been implemented using a PID controller algorithm, which tries to track the Set-point in Real-time.
(1).This presentation focuses on significant role & rapid growth of sensors, control systems and automation technologies such as Programmable Logic Controller (PLC), Supervisory Control and Data Acquisition (SCADA) & LABVIEW.
(2).This project replaces the conventional relay, switches and other conventional devices with a virtual
programming-based PLC controller.
(3).This new system will create a new era in the field of Process Automation & Moreover, from a technical point of view, it is clearly visible from the results that liquid level, mixing and heating of system greatly reduces the time, money and cost.
(4).The experimental investigations in LABVIEW show that the new system developed would be highly flexible and easy in controlling the level.
(5).Nevertheless, during manufacturing of any product heating, mixing of chemicals and level control are most critical parameters in the industrial processes; and all these parameters are successfully controlled using LABVIEW enabled computer control system.
Development of Automatic Mixing Process for Fertigation System in Rock Melon ...IJECEIAES
This work proposed an automatic mixing system of nutrient solution for rock melon fertigation according to the required electrical conductivity (EC) level. Compared to the manual practice, this automatic system will ensure continuous supply of mixed nutrient solution without the need to daily check and mix new nutrient. Thus, this easy to use and low cost automatic system will reduce the burden of the farmers. This system uses an EC sensor to automatically check the concentration level of the mixed nutrient solution. Other than that, the system only consists of electronic pumps for mixing process and an Arduino board as the controller. The controller will monitor the EC level and run the mixing process when the EC level is below the required level. By calibrating the EC sensors, the test shows that the automatic mixing system is able to accurately keep the mixed nutrient solution concentration in a 400 L mixing reservoir at several required levels.
Similar to Programmable logic controller (plc) for polymer mixing tank (20)
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Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
• Remote control: Parallel or serial interface.
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Technical Specifications
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
Key Features
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
• Remote control: Parallel or serial interface
• Compatible with MAFI CCR system
• Copatiable with IDM8000 CCR
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
Application
• Remote control: Parallel or serial interface.
• Compatible with MAFI CCR system.
• Compatible with IDM8000 CCR.
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
• Easy in configuration using DIP switches.
Water scarcity is the lack of fresh water resources to meet the standard water demand. There are two type of water scarcity. One is physical. The other is economic water scarcity.
Explore the innovative world of trenchless pipe repair with our comprehensive guide, "The Benefits and Techniques of Trenchless Pipe Repair." This document delves into the modern methods of repairing underground pipes without the need for extensive excavation, highlighting the numerous advantages and the latest techniques used in the industry.
Learn about the cost savings, reduced environmental impact, and minimal disruption associated with trenchless technology. Discover detailed explanations of popular techniques such as pipe bursting, cured-in-place pipe (CIPP) lining, and directional drilling. Understand how these methods can be applied to various types of infrastructure, from residential plumbing to large-scale municipal systems.
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Hybrid optimization of pumped hydro system and solar- Engr. Abdul-Azeez.pdffxintegritypublishin
Advancements in technology unveil a myriad of electrical and electronic breakthroughs geared towards efficiently harnessing limited resources to meet human energy demands. The optimization of hybrid solar PV panels and pumped hydro energy supply systems plays a pivotal role in utilizing natural resources effectively. This initiative not only benefits humanity but also fosters environmental sustainability. The study investigated the design optimization of these hybrid systems, focusing on understanding solar radiation patterns, identifying geographical influences on solar radiation, formulating a mathematical model for system optimization, and determining the optimal configuration of PV panels and pumped hydro storage. Through a comparative analysis approach and eight weeks of data collection, the study addressed key research questions related to solar radiation patterns and optimal system design. The findings highlighted regions with heightened solar radiation levels, showcasing substantial potential for power generation and emphasizing the system's efficiency. Optimizing system design significantly boosted power generation, promoted renewable energy utilization, and enhanced energy storage capacity. The study underscored the benefits of optimizing hybrid solar PV panels and pumped hydro energy supply systems for sustainable energy usage. Optimizing the design of solar PV panels and pumped hydro energy supply systems as examined across diverse climatic conditions in a developing country, not only enhances power generation but also improves the integration of renewable energy sources and boosts energy storage capacities, particularly beneficial for less economically prosperous regions. Additionally, the study provides valuable insights for advancing energy research in economically viable areas. Recommendations included conducting site-specific assessments, utilizing advanced modeling tools, implementing regular maintenance protocols, and enhancing communication among system components.
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Student information management system project report ii.pdfKamal Acharya
Our project explains about the student management. This project mainly explains the various actions related to student details. This project shows some ease in adding, editing and deleting the student details. It also provides a less time consuming process for viewing, adding, editing and deleting the marks of the students.
Student information management system project report ii.pdf
Programmable logic controller (plc) for polymer mixing tank
1. Programmable Logic Controller (PLC) for Polymer
Mixing Tank
A’zraa Afhzan Ab Rahim, Mohd Hazwan Md Shah, Ili Shairah Abdul Halim, Siti Lailatul Mohd Hassan
Faculty of Electrical Engineering, Universiti Teknologi MARA,
40450 Shah Alam Malaysia
azraa.afhzan@yahoo.com , hazwan.mdshah@gmail.com, shairah@yahoo.com, sitilailatul@salam.uitm.edu.my
Abstract— This project focuses on improving the performance
of a plant’s sludge dewatering process by using Omron CP1E
Programmable Logic Controller (PLC) to increase the
efficiency of the process which leads to a reduction in cost of
the polymer product. The process requires manually mixing
the cationic polymer long chains with raw water to produce a
product that will be sent to the sludge tank process and filter
press process where the sludge will harden for disposal. The
addition of PLC into the process will reduce error caused by
human. The Omron PLC will control the water intake inlet and
pump for polymer needed to be mixed by measuring the level
of water inside the tank using the sensor to control amount of
water and polymer. The project works on upgrading an
established system that uses manual mix method to automated
method that will produce more accurate concentration of
polymer without any human error.
Keywords-PLC, polymer mixing, Jar test
I. INTRODUCTION
The polymer mixing preparation and dosing tank is a part
of the dewatering process. While treating waste water,
polluted products are removed whilst the treated water is
released in the environment. Sludge is formed from the
aerobic wastewater treatment which contains a mixture of
microorganism. Only the settled sludge will be decanted to
the sludge tank and treated. The polymer is used in
dewatering process for the sludge treatment where the
function of the polymer is to thicken the sludge before the
sludge goes into the filter press machine. The polymer
product output is a mixture of raw water and cationic
polymer long chain.
The main system is the Omron PLC that acts as a control
system to the electronic device or equipment to ensure the
accuracy, stability and smooth transition of the process [1].
Due to the rapid advancement of technologies, the PLC can
be used to complete complicated control task that uses
highly automated control system by using signal interfacing
device such as motor, solenoid valves and float sensors
where the capabilities of these devices can be implemented
to ensure the process runs in good coordination. The
proposed system will operate by using a magnetic float
sensor as a feedback to the controller to give signal to the
output section. The system uses PLC because of the
rustiness of the product and it is also suitable for fast
switching. Fast switching is appealing because the mixing
product concentration will be affected if either valve or
pump did not close at specific given time that based on the
sensor. The solenoid type valve is used as the main valve
because of the quick opening provided by the coil. Basically
this solenoid valve is normally closed. The agitator which is
used to mix the product of polymer and raw water uses
direct current motor where the optimum voltage has been set
to around 3.5V [2]. The product for polymer is a cationic
polymer long chain that will be mixed together with raw
water to produce an output that will harden the organic
sludge waste. All this system is a part of the dewatering
process in chemical waste treatment plant [3].
This system is used to mix chemical product to produce
an output that will harden the organic sludge. There are two
designated tanks that will store the chemical products which
are used for preparation and dosing [4]. Initially, raw water
will be filled up until it reaches 80 percent of the preparation
tank. Then the polymer with a concentration of 0.2 percent
will be dosed to the preparation tank. The motor mixer will
be turned on after dosing the polymer and will run for 2
minutes 16 seconds to obtain a chemical reaction that will
produce the desired output. The process will continue by
filling up the dosing tank where the polymer will then be
sent to the thickened sludge tank process and sludge tank
mixer. The process will be repeated as long as the dosing
tank level has not reached the maximum set level [1]. The
magnetic float sensor will be placed inside the two tanks to
control each designated level to give signal to the controller.
All this process is done automatically by the Omron CP1E
PLC.
II. METHODOLOGY
The project aims to design a polymer mixing system that
works automatically using the CP1E Omron PLC. There are
two 18 liter tanks that contain polymer with each tank
having its own function. The upper tank which is the main
tank will be used as a preparation tank for the polymer. The
lower tank is used as a reservoir tank to store the product
before the polymer will be dosed to other process such as
sludge mixing tank or table thickening sludge. The magnetic
float sensor will be used to send feedback signals to the
controller to detect changes in water level. The actuators
used are solenoid valves and direct current motor to control
the water flow and agitator as a stirrer inside the preparation
2. tank respectively. This entire signal will be sent to the
Omron CP1E PLC. Figure 1 shows the block diagram of the
general process flow of the polymer mixing process.
Analysis then is carried out on the valve flow rate, the
sequence timing and chemical concentration.
Figure 1 General process flow
A. Software development
This part involves ladder diagram programming of the
CX programmer for the Omron CP1E programmable logic
controller. This software is developed to interface with the
sensor and the actuators of the process:
i. Siemens LOGO simulation
A computer program that uses ladder diagram symbols
to construct instruction for the PLC. This computer
program can simulate the ladder diagram instruction to
predict the outcome for input and output.
Figure 2 Overall flow chart of the Polymer
mixing process
B. Hardware development
The hardware part consists of two designated tank
of 18 liters which will be used as preparation tank and
dosing tank. The tank level will be controlled by the
three magnetic level sensors where each of the level as it
own function to interlock with the controller. The PLC
acts as the brain for the hardware part where it receives
signal from the inputs and process it for outputs signal to
be send. So basically, the float sensor is the main
feedback of the process that will interlock with the
actuators.
i. Magnetic float sensor
The float sensor is a device that will detect a
change in water level. The sensors will send the
signal back to the programmable logic controller
to be processed. The magnetic float sensor is one
of the smallest in the world and suitable for this
project scale. Figure 3 shows the dimension of
the sensors.
Figure 3 Magnetic level sensor diagram [5]
ii. Solenoid Valve
The solenoid valve uses an electrical coil that
will convert electrical into mechanical energy
that will open or shut off the valve. The valve
was chosen based on fast opening characteristics.
Fill 80% of tank
with raw water
Polymer dosing at 0.2 %
concentration
Mixing process for 2 minutes 16
seconds
Filling up the dosing tank
Dosing products to other process
End
3. Figure 4 Solenoid valves [5]
iii. DC motor (stirrer)
Using a direct current motor for the agitator part
so that the mixture can diffuse much better. The
motor was chosen because the stirring part does
not require much torque where it can affect the
polymer quality.
iv. AC Pump
AC pump was used to supply the polymer to the
tank at normal flow rate from the polymer
container. The pump is used only at the
preparation tank parts, where polymer been mix.
v. Omron CP1E Programmable Logic Controller
(PLC).
The programmable logic controller is used as
control system to control the sequence transition
smoothly. The PLC is designed for multiple
inputs and outputs arrangement where the output
response to the input conditions.
Figure 5 Input block arrangement
Figure 6 Output block arrangement
Figure 7 General diagram of the hardware
Table 1 Description table for Figure 7
Term Description
VA Valve A
VB Valve B
LL Low Level
LP Process Level
LH High Level
Table 2 Discrete state table for mixing
polymer tank
4. Figure 8 Flow chart of the P
process
III. RESULTS AND DISCUSSION
A. Results
i. Flow rate
Flow rate is the amount of f
through a certain given surface
this project, flow rate is defi
minutes. The flow rate is determ
11 litre container and stopwatc
standard water flow rate. Table
below will show two kinds of
standard water hose and soleno
shows the different methods of
using solenoid valve and sta
shows that the flow rate with
employed to fill water is m
without solenoid valve, which i
solenoid valve helps speed up th
Table 3 Flow rate t
olymer mixing
fluid that passes
per unit time. In
ined as liter per
mined by using an
h to measure the
e 3 and Figure 9
testing using the
id valve. Table 3
filling raw water
andard valve. It
h solenoid valve
much faster than
indicates that the
he process.
test
Figure 9 Flow
ii. Jar test
Jar tests are test
effectiveness of che
treatment facility. M
to water can be eva
scale by the usin
important of these c
coagulation such a
Using the jar test th
be approximated.
coagulant dosages
dosing flow rate, d
outlet water quality
of chemical used an
flow at the meterin
with regards to the
quality taken from
Under dosing or
(coagulant & floccu
chemical processes
Table 4, Table 5 a
results of the test.
Table 4 Jar Test 1
C
Table 5 Jar Test 2
C
0
0.5
1
1.5
2
2.5
1 2 3 4 5 6 7
Minutes
Litres
w rate graph
ts designed to show the
emical treatment in a water
Many of the chemical added
aluated on a small laboratory
ng the jar test. The most
chemicals are those used for
as coagulant and polymers.
he correct coagulant dose can
Jar test results includes
and settle water pH, pump
dissolved air flotation (DAF)
and actual volume /quantity
nd cost. The actual chemical
ng pump are then calculated
e optimum dosing and water
m the same water sample.
overdosing of chemicals
ulants) will upset the chain in
and increase operational cost.
nd Table 6 below show the
(pH=6.63, Turbidity=34.2,
OD=5510)
(pH=4.87, Turbidity=41,
OD=4130)
7 8 9 10
with
solenoid
valve
without
solenoid
valve
5. Table 6 Jar Test 3 (pH=6.07, Turbidity=15
COD=5270)
B. Discussion
Based on the test results, design of the prototype
can be made using the variables available in
Table 4, Table 5 and Table 6. The filling process
time for an 11 liter container has an average of
1.38 minutes using solenoid valve where 11 liter
without solenoid valve has an average of 1.89
minutes. The actual flow rate is 70000 liter per
60 minutes, where in one minute it can fill up to
1,166.67 liter. The final flow rate is
approximately 8.33 liter per minute.
The jar test is used as a reference for the
coagulant dosing rate where all the calculations
are based on actual results. The yellow
highlighted in the table shows the optimum plant
performance based on chemical oxygen demand
(COD). A small value of COD is a good
indicator for the water disposal because the
small COD contain small amount of carbon
inside the water, where high carbon will affect
the amount of oxygen for the aquatic life. The
entire jar test had been done three times to vary
the water quality during each test. The standard
end result for the water quality is COD value
below 6000mg/l, turbidity below 20 ntu and the
pH is around 6-7. So the 7ml of coagulant and
1mg/l of polymer is the optimum quantity based
on the results given.
The plant should dose the coagulant at 120000
liter per hour with regard to the water quality.
The flow rate can be calculated using Equation
(1).
F = DI (Flow rate 70m3
/hr) (1)
1000 x SG
F = Flow rate of the pump
D = Dosage of the chemical
SG =Fixed variable for the chemical
I = flow rate of the plant
Table 7 Result for flow rate and dosage
Calculation F
(L/hr)
D
(g/m3)
I
(m3/hr)
SG
1 3.13 60 70 1.34
2 9.91 190 70 1.34
3 6.30 120 70 1.34
i. Cost calculation
Saving
= (9.91 - 6.3 ) L/hr
= 3.6 L/hr x 24 x RM 2.75/kg x 1.34
= RM 318 / day
From Table 7, three calculations have been carried
out. The first shows the dosage is under dosed at 60 g/m3
and metering pump set at 3.13 L/hr. The second calculation
shows the dosage is overdosed at 190 g/m3
and metering
pump set at 9.91 L/hr. The plant optimum dosage should be
120 g/m3
and the pump metering flow should be set to 6.30
L/hr. At 120 g/m3
the plant can save cost at least RM
318/day based on the calculation above.
From all the calculations done, the flow rate of the
water at house and plant can be compared having a ratio of
1:140 for the coagulant dosing rate. Using an 18 liter tank,
the polymer should be filled with 36 g per liter at about
0.2 % concentration. The Jar test had shown the actual result
to determine how much coagulant and polymer need to be
used by measuring the liquid chemical oxygen demand
(COD). The calculation method above shows how to
measure and adjust the pump setting to get the desired
output needed.
IV.CONCLUSION
Nowadays, most of the control system operation in
industries uses PLC as a controller to control the process. It
is available in the process control, transportation, domestic
appliances, production lines and many others.
From the experiment and testing, the PLC system can be
implemented using the existing standard procedure. The
automated system can improve the performance of the
process whereas it erased mostly the existing manual system.
The PLC also manages to work efficiently based on the
feedback from the sensor and works well with the actuators
such as solenoid valves and DC motor. It can be concluded
that the objective of this project to upgrade an established
system that uses manual mix method to automated method
that will produce more accurate concentration of polymer
without any human error and improve the process in terms
of time saving for preparation is achieved.
In future work, this system can be improved by
connecting it to the distributed control system (DCS) where
the operator can monitor the mixing process just by looking
to the monitor. The operator also can make changes much
6. easier to the process. Besides that the control variable and
manipulated variable can be control more efficiently.
ACKNOWLEDGMENT
The authors would like to the acknowledge Redzarul
Redzuan, process engineer of Veolia Water (M) Sdn.Bhd for
his dedication , guidance, advice and the generous amount
of time he spent. The authors would also like to
acknowledge Veolia water plant laboratory technician for
their support of using the lab equipment as well as Faculty
of Electrical Engineering, UiTM for supporting this project.
REFERENCE
[1] P. Programming, "pacontrol," 7 May 2000. [Online].
Available:
http://www.pacontrol.com/download/OMRON-PLC-
Programming.pdf. [Accessed 2012].
[2] C. D.Johnson, "Actuators," in Process Control
Instrumentation Technology, Pearson/Prentice Hall,
2006, 2006, pp. 358-367.
[3] V. Water, Polymer Standard Procedure, Veolia Water
(M).
[4] L. G. W. rossman, "Scale-model studies of mixing in
drinking water storage tanks," Journal of
Environmental Engineering, no. 125(8), pp. 755-761.
[5] R. Components, Magnetic Float sensors, RS.