This topic is the research woodchip boiler automation system modernization feasibility study, through the optimization of the concentration of O2 in the flue gas. Goal is to reserach and identify existing furnace automation control systems in one company, and the development of automation control systems improvement model to one chip furnace .
Theoretical Analysis for Energy Consumption of a Circulation-Type Superheate...IJMER
Recycled waste material has recently become of interest because of the huge amount of
natural resource consumption worldwide. It is necessary to introduce a material recycle system in
municipal and industrial waste management. Quality improvement of oily metal waste disposed from
metalworking factories as recycling materials is one of the issues. Here, the degreasing system plays an
important role. In this paper, energy consumption of a circulation-type superheated steam degreasing
system was applied to oily metal waste disposed from a metalworking factory. This system was
compared to a once-through type superheated steam degreasing system. Flow rates of materials
applicable to the degreasing system were estimated based on preliminary experiments, and heat and
energy balances from the system were theoretically evaluated and compared between once-through and
circulation type systems. As a result, a circulation-type superheated steam waste degreasing system
that can process oily metal waste provides a promising energy-saving waste metal recycle system.
Presentation - Coal and Biomass Combustionncarlin50
These are slides from my doctoral defense in March 2009. Supply and properties of biomass are discussed. The proposed co-firing and reburing of coal with biomass is then presented. Finally, a conceptualized model of a waste-based biomass disposal system is presented. If you have any interests or questions of this work or if you would like to see this presentation with animated graphics, please e-mail Nicholas Carlin at ncarlin50@hotmail.com.
Theoretical Analysis for Energy Consumption of a Circulation-Type Superheate...IJMER
Recycled waste material has recently become of interest because of the huge amount of
natural resource consumption worldwide. It is necessary to introduce a material recycle system in
municipal and industrial waste management. Quality improvement of oily metal waste disposed from
metalworking factories as recycling materials is one of the issues. Here, the degreasing system plays an
important role. In this paper, energy consumption of a circulation-type superheated steam degreasing
system was applied to oily metal waste disposed from a metalworking factory. This system was
compared to a once-through type superheated steam degreasing system. Flow rates of materials
applicable to the degreasing system were estimated based on preliminary experiments, and heat and
energy balances from the system were theoretically evaluated and compared between once-through and
circulation type systems. As a result, a circulation-type superheated steam waste degreasing system
that can process oily metal waste provides a promising energy-saving waste metal recycle system.
Presentation - Coal and Biomass Combustionncarlin50
These are slides from my doctoral defense in March 2009. Supply and properties of biomass are discussed. The proposed co-firing and reburing of coal with biomass is then presented. Finally, a conceptualized model of a waste-based biomass disposal system is presented. If you have any interests or questions of this work or if you would like to see this presentation with animated graphics, please e-mail Nicholas Carlin at ncarlin50@hotmail.com.
Integrated Air Conditioning Unit for AutomobilesIJARTES
Integrated Air Conditioning Unit for
Automobiles
In this paper, the investigation was made for the utilization
of waste heat in an improvised manner, so that the total
power of the automobile is not going to change and the fuel
efficiency is going to be enhanced. Here the use of vapor
absorption refrigeration system for the air conditioning
system was proposed and analyzed. This system was taken as
it can run on very low grade energy, such as waste heat of
the exhaust gas. The recent trend is to use the vapor
compression refrigeration system, where the principal part is
the compressor, which takes the power from the engine or
from auxiliary power unit and hence the fuel consumption
rate is increased. In the recent global scenario reducing the
fuel consumption is the main research area. The cooling
load of the automobile is estimated about 1.37 TR and the
measured cop value for the proposed model is varied from
0.85 to 1.04.
Here the main problem definition is to design an air
conditioning system which runs on exhaust gas waste heat
by exchanging with the refrigerant R134-a inside a
generator which is the replacement of the compressor in a
vapor absorption refrigeration system. The calculation
related to the design of proposed shell and tube heat
exchanger i.e. the generator for the model is carried out and
the rest design is theoretical study and proposed model to be
implemented in large scale after prototype model testing.
International Journal of Engineering Research and Development (IJERD)IJERD Editor
journal publishing, how to publish research paper, Call For research paper, international journal, publishing a paper, IJERD, journal of science and technology, how to get a research paper published, publishing a paper, publishing of journal, publishing of research paper, reserach and review articles, IJERD Journal, How to publish your research paper, publish research paper, open access engineering journal, Engineering journal, Mathemetics journal, Physics journal, Chemistry journal, Computer Engineering, Computer Science journal, how to submit your paper, peer reviw journal, indexed journal, reserach and review articles, engineering journal, www.ijerd.com, research journals,
yahoo journals, bing journals, International Journal of Engineering Research and Development, google journals, hard copy of journal
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology.
Welcome to International Journal of Engineering Research and Development (IJERD)IJERD Editor
journal publishing, how to publish research paper, Call For research paper, international journal, publishing a paper, IJERD, journal of science and technology, how to get a research paper published, publishing a paper, publishing of journal, publishing of research paper, reserach and review articles, IJERD Journal, How to publish your research paper, publish research paper, open access engineering journal, Engineering journal, Mathemetics journal, Physics journal, Chemistry journal, Computer Engineering, Computer Science journal, how to submit your paper, peer reviw journal, indexed journal, reserach and review articles, engineering journal, www.ijerd.com, research journals,
yahoo journals, bing journals, International Journal of Engineering Research and Development, google journals, hard copy of journal
Process heat requirement constitutes a large part of global energy demand. Solar thermal harnesses heat from the sun that can be effectively used for process heat requirements, and save upto 30% cost when compared to conventional energy sources like gas, diesel, electricity etc.
HMX offers solar thermal solutions for steam generation and high-temperature hot water for a range of applications such as process heating, CIP (clean in place), pasteurization, distillation, cooking, air heating, etc., across industries and commercial establishments.
Combined Heat and Power is the simultaneous production of
electricity and heat using a single fuel such as natural gas. The heat produced from the electricity generation process is captured and used to produce steam or hot water that can then be used for industrial and commercial heating or cooling purposes, such as district energy systems. The dual output of CHP facility can make more efficient use of fuel than two separate facilities that each just produce just heat or electricity. Consequently a CHP facility can provide the same energy services with lower greenhouse gas emissions.
Pippah is a family owned Australian business where we personally believe in, test and regularly use all of our Turkish towel products that are for sale
Integrated Air Conditioning Unit for AutomobilesIJARTES
Integrated Air Conditioning Unit for
Automobiles
In this paper, the investigation was made for the utilization
of waste heat in an improvised manner, so that the total
power of the automobile is not going to change and the fuel
efficiency is going to be enhanced. Here the use of vapor
absorption refrigeration system for the air conditioning
system was proposed and analyzed. This system was taken as
it can run on very low grade energy, such as waste heat of
the exhaust gas. The recent trend is to use the vapor
compression refrigeration system, where the principal part is
the compressor, which takes the power from the engine or
from auxiliary power unit and hence the fuel consumption
rate is increased. In the recent global scenario reducing the
fuel consumption is the main research area. The cooling
load of the automobile is estimated about 1.37 TR and the
measured cop value for the proposed model is varied from
0.85 to 1.04.
Here the main problem definition is to design an air
conditioning system which runs on exhaust gas waste heat
by exchanging with the refrigerant R134-a inside a
generator which is the replacement of the compressor in a
vapor absorption refrigeration system. The calculation
related to the design of proposed shell and tube heat
exchanger i.e. the generator for the model is carried out and
the rest design is theoretical study and proposed model to be
implemented in large scale after prototype model testing.
International Journal of Engineering Research and Development (IJERD)IJERD Editor
journal publishing, how to publish research paper, Call For research paper, international journal, publishing a paper, IJERD, journal of science and technology, how to get a research paper published, publishing a paper, publishing of journal, publishing of research paper, reserach and review articles, IJERD Journal, How to publish your research paper, publish research paper, open access engineering journal, Engineering journal, Mathemetics journal, Physics journal, Chemistry journal, Computer Engineering, Computer Science journal, how to submit your paper, peer reviw journal, indexed journal, reserach and review articles, engineering journal, www.ijerd.com, research journals,
yahoo journals, bing journals, International Journal of Engineering Research and Development, google journals, hard copy of journal
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology.
Welcome to International Journal of Engineering Research and Development (IJERD)IJERD Editor
journal publishing, how to publish research paper, Call For research paper, international journal, publishing a paper, IJERD, journal of science and technology, how to get a research paper published, publishing a paper, publishing of journal, publishing of research paper, reserach and review articles, IJERD Journal, How to publish your research paper, publish research paper, open access engineering journal, Engineering journal, Mathemetics journal, Physics journal, Chemistry journal, Computer Engineering, Computer Science journal, how to submit your paper, peer reviw journal, indexed journal, reserach and review articles, engineering journal, www.ijerd.com, research journals,
yahoo journals, bing journals, International Journal of Engineering Research and Development, google journals, hard copy of journal
Process heat requirement constitutes a large part of global energy demand. Solar thermal harnesses heat from the sun that can be effectively used for process heat requirements, and save upto 30% cost when compared to conventional energy sources like gas, diesel, electricity etc.
HMX offers solar thermal solutions for steam generation and high-temperature hot water for a range of applications such as process heating, CIP (clean in place), pasteurization, distillation, cooking, air heating, etc., across industries and commercial establishments.
Combined Heat and Power is the simultaneous production of
electricity and heat using a single fuel such as natural gas. The heat produced from the electricity generation process is captured and used to produce steam or hot water that can then be used for industrial and commercial heating or cooling purposes, such as district energy systems. The dual output of CHP facility can make more efficient use of fuel than two separate facilities that each just produce just heat or electricity. Consequently a CHP facility can provide the same energy services with lower greenhouse gas emissions.
Pippah is a family owned Australian business where we personally believe in, test and regularly use all of our Turkish towel products that are for sale
Existe uma vasta gama de banco de dados gerenciados além daqueles que rodam no Amazon EC2 por conta própria. Bancos de dados gerenciados diminuem os esforços de implementar, administrar e manter o seu banco de dados e permite que possa focar na suas aplicações. Entenda as opções e suas diferenças, além das melhores práticas para escolha de uma ou mais delas.
Presentation De Diamond Cibodas Resort and Villa Bandungdediamond
Vision
Being one of the BEST developer and RELIABLE IN ASIA PACIFIC
Mission
Introduce all kinds of people to be able to learn to invest
Develop the potential of all people to be able to invest in property with a small capital
Experimental Investigation of Sheanut Shells Ash as Partial Replacement of Ce...researchinventy
Modern scientific and technological move towards concrete production is aimed at achieving sustainable and affordable concrete construction. This move has led to the search for non-conventional local supplementary cementitious materials (SCM’s) including the possibility of using industrial and agricultural based pulverized and combustible wastes in concrete construction. In this study, an experimental investigation was conducted on the potential use of sheanut shells ash, derived from the combustion of sheanut shells – an agro-based waste, as partial replacement of cement in concrete. The cement content in the concrete mix was partially replaced 0%, 10% and 20% by mass with sheanut shells ash. The effect of the ash on setting time and workability were examined. Five concrete cubes were prepared for each of the replacement levels from which three cubes were randomly selected from each replacement level and tested for compressive strength at three stages of curing age (14, 28 and 90 days). There were high and minimal reductions in the compressive strengths of the experimental cubes over the control cubes at the 14 and 28 curing age respectively. However, there was a significant increase in strength of the experimental cubes over the control cubes at the 90 days curing age. Though the ash has an improved increasing effect on strength, the findings will limit it use in situations where long term strength development is required.
WASTE HEAT RECOVERY TO INCREASE BOILER EFFICIENCY USING BAGASSE AS FUEL IAEME Publication
Many industrial heating processes generate waste energy in textile industry; especially exhaust gas from the boiler at the same time reducing global warming. Waste heat found in the
exhaust gas can be used to preheat the incoming gas. This is one of the basic methods for recovery of waste heat. Therefore, this article will present a study the way to recovery heat waste from boiler exhaust gas by mean of shell and tube heat exchanger.
Arm7 based automatic soot blower control systemijics
Boiler is a power house of any process industry. Soot and scale formation in boilers is still a great concern
for increasing the efficiency of the boiler. At present, soot blowers are operated manually once in a shift.
This paper presents one of the embedded based industrial automation techniques for efficient operation of
soot blowers. An automation technique is designed and implemented in real time using ARM7 platform.
Stack temperature is used as the criteria for controlling the soot blower. Embedded C language is used for
implementing the automatic control algorithm. The performance of the designed system is tested in the
laboratory.
Enhancing Energy Efficiency of Thermochemical Vacuum-Processes and SystemsALD Vacuum Systems Inc.
The energy optimization of thermoprocessing equipment is of great ecological and economical importance. Thermoprocessing equipment consumes up to 40% of the energy used in industrial applications in Germany. Therefore it is necessary to increase the energy efficiency of thermoprocessing equipment in order to meet the EU’s targets to reduce greenhouse gas emissions. In order to exploit the potential for energy savings, it is essential to analyze and optimize processes and plants as well as operating methods of electrically heated vacuum plants used in large scale production.
Review of Gas Turbine Combustion Chamber Designs to Reduce EmissionsIJAEMSJORNAL
Ensuring the environmental safety of aircraft engines is an important task for developers. This problem is becoming more urgent due to an increase in engine power, since an increase in power is achieved primarily by increasing the temperature in the combustion chamber, leading to an increase in NOx emissions. In this study, the problem of emission in the aviation industry and ways to solve it were considered. Separately, the method of reducing emissions by changing the design of combustion chambers was considered in more detail.
Energy Audit and Heat Recovery on the Rotary Kiln of the Cement Plant in Ethi...IJAEMSJORNAL
This study deals with the energy audit and heat recovery on the rotary kiln taking a cement factory in Ethiopia as a case study.The system is a dry type rotary kiln equipped with a five stage cyclone type preheater, pre-calciner and grate cooler. The kiln has a capacity of 2,000 tons/day.Mass and energy balance has been performed for energy auditing. The energy lost from the kiln shell is about 4.3 MW. By using secondary shell on the rotary kiln about 3.5MW could be recovered safely.This energy saving reduces fuel consumption (almost 9%) of the kiln system, and increases the overall system efficiency by approximately 2–3%.
Classification, Advantages and applications, Commercially viable
waste heat recovery devices, Saving potential.
Waste heat is heat, which is generated in a process by way of fuel combustion or chemical
reaction, and then “dumped” into the environment even though it could still be reused for some
useful and economic purpose. The essential quality of heat is not the amount but rather its
“value”. The strategy of how to recover this heat depends in part on the temperature of the waste
heat gases and the economics involved.
Ash Cooler Heat Recovery Under Energy Conservation SchemeIJAPEJOURNAL
A healthy fluidization state in circulating fluidized-bed combustion (CFBC) combustor is attributed to proper quantity of hot bed material (ash), which acts as a thermal fly-wheel. It receives & stores thermal energy from the burning of fuel (lignite) & distributes uniformly throughout the combustor & helps in maintaining a sustained combustion. The quantity of bed ash inside the combustor or size of the bed, depends upon boiler load & subsequently upon combustor temperature, lignite feed rate and ash % in lignite. As these parameters varies during process continuously, sometimes it becomes necessary to drain out the ash from the combustor. As & when differential pressure across the bed is increased from a justified level, draining of hot bed ash starts into Ash Coolers. Bed ash is drained at very high temperature of 850 oC & it also contains burning particles of lignite. This paper describes the heat recovery from bed ash, unloaded from the combustor into ash cooler, by pre-heating the condensate water of turbine cycle in a 125 MW CFB boiler of Surat Lignite Power Plant in India. The thermal performance of ash cooler was derived by doing a heat balance calculation based on the measured temperature of ash and cooling water with different load. From the heat balance calculation influence of ash temperature and ash amount on heat transfer coefficient is determined. Simulation is carried out around main turbine cycle indicates improved thermal economy of the unit, higher plant thermal efficiency, lower plant heat rate and reduce fuel consumption rate. Also simulation result shows that the heat transfer coefficient increase with ash amount and decreases with increase in ash temperature.
Use of Process Analyzers in Fossil Fuel PlantsIves Equipment
In spite of all efforts concerning energy savings and efficiency, the growing world population and the aspired higher 'standard of living' will lead to a further in- crease of world energy demand. In this context, almost half of the primary energy demand will continue to be covered by solid fuels, particularly by coal, until 2020 and many years beyond.
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Hierarchical Digital Twin of a Naval Power SystemKerry Sado
A hierarchical digital twin of a Naval DC power system has been developed and experimentally verified. Similar to other state-of-the-art digital twins, this technology creates a digital replica of the physical system executed in real-time or faster, which can modify hardware controls. However, its advantage stems from distributing computational efforts by utilizing a hierarchical structure composed of lower-level digital twin blocks and a higher-level system digital twin. Each digital twin block is associated with a physical subsystem of the hardware and communicates with a singular system digital twin, which creates a system-level response. By extracting information from each level of the hierarchy, power system controls of the hardware were reconfigured autonomously. This hierarchical digital twin development offers several advantages over other digital twins, particularly in the field of naval power systems. The hierarchical structure allows for greater computational efficiency and scalability while the ability to autonomously reconfigure hardware controls offers increased flexibility and responsiveness. The hierarchical decomposition and models utilized were well aligned with the physical twin, as indicated by the maximum deviations between the developed digital twin hierarchy and the hardware.
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Research of Woodchip Automation System Modernization Boiler Using O2 Concentration Optimization Options in the Flue Gas
1. Research Inventy: International Journal of Engineering And Science
Vol.6, Issue 6 (July 2016), PP -56-61
Issn (e): 2278-4721, Issn (p):2319-6483, www.researchinventy.com
56
Research of Woodchip Automation System Modernization Boiler
Using O2 Concentration Optimization Options in the Flue Gas
1
Ansis Steinbergs, 2
Igors Uteshevs
1
Riga Technical university, Latvia, Riga,
2
Riga Technical university, Latvia, Riga,
Abstract: This topic is the research woodchip boiler automation system modernization feasibility study, through the
optimization of the concentration of O2 in the flue gas. Goal is to reserach and identify existing furnace automation control
systems in one company, and the development of automation control systems improvement model to one chip furnace .
Keywords: Automation control systems, gas detectors, sensor systems and applications
I. Introduction
One of the most actual problems of society in the 21st century, energy-related - its operation as over
time, increasing technological development, the society is increasing its commitment to the comfort, which in
turn increases the demand for energy. Sustainable development of society based on the idea that the growth of
energy consumption is to ensure that present needs are met without compromising the needs of future
generations. Ensuring a sustainable society is the use of thermal energy to maximize the use of renewable
natural energy resources. Thus, indicating that environmental protection and good economic results are not
conflicting economic growth and social quality of life should not degrade the environment. Sustainable
development of society is characterized by three interrelated dimensions: the ecological state of the
environment, economic and social dimension.
To date, most of the Autonomous oven is still powered by fossil fuels: oil, gas or coal. Fuel is fed from
a furnace to a low pressure burner where it is ignited. The oven immediately able to operate at full capacity only
after a query can stop the operation immediately. However, to ensure complete combustion of fossil fuels for
furnaces require a large amount of oxygen and traction, thus increases, but decreases with increasing heat
absorption process, thereby causing the heated chimney.
In addition to oxygen consumption in the furnace can increase the formation of nitrogen oxides in the
flue gas, which has a negative impact on the environment. It is characterized by the fact that natural resources
(oil, gas, coal) almost never recover naturally. The European Union has identified the requirements for all fossil
fuel boilers meet performance standards higher than 90% [[4]].
Since the use of fossil fuels to provide a temporary quality of life and degrades the environment,
studies show that it is necessary to get away from fossil fuels and move fuel from biomass [[4]].
Thus, a sustainable society is important for research in the field of renewable and clean energy sources,
and also uses the heat dissipation. Significant biomass resource is wood. Time timber resource recovery is about
40 years. Wood used directly as fuel wood waste, which is not further used in the industry: the branch of tree
bark chips, wood and other green wood. Wood chip furnace is widely used. Wood, depending on the size and
capacity can be used for residential heating and industrial needs used industrial furnaces:
- Hot flue gases for the dryer drum drying, high-quality wood,
- Thermal heating of industrial premises,
- Creation of steam and thermal power as a by-product, still more heat, which can be used in the local heating of
the housing [[2]].
These ovens are usually automated. However, the automation system does not always provide complete
combustion of the material, which creates more ash, is therefore necessary to increase the fuel consumption of
resources. Thus, the decision to study the problem associated with the automatic control system, the new control
algorithm development is to increase furnace efficiency.
II. Problem formulation
The Oven chips are diverse, the differences depend on the fuel provided for the degree of humidity and
the quality of the material. Oven chips classified according to material quality, which can burn in furnaces.
Classification can be seen in Fig 1.
Co-current oven is designed for dry combustion of fuel, such as pellets, straw, etc. Such systems oven
reduces NOx unburned gas into the atmosphere, burning it completely, combustion waste gas containing
relatively high ash emissions. To free environment, there should be a separate filter system the ash collection.
2. Research of Woodchip Automation System Modernization Boiler Using O2 Concentration..
57
FIGURE1. Oven chips classification types.
Counter-current woodchip furnace type is the most low-quality combustion of fuel, such as: wet bark,
wood chips or sawdust. Thermal convection as a result, the hot flue gas is dried in an oven incoming materials.
In this system, the flue gas evenly mixed with secondary air supply, thus ensuring efficient waste gas
combustion and reducing emissions.
Cross-current oven it is combined in such a way that it can burn both dry and relatively wet material,
the above-mentioned furnaces. However, the lack of oven is a relatively large amount of ash in the flue gas,
which may come into flue systems therefore provide powerful filter system [[14]].
Oven chips are a completely automated. Wood moisture may be from 15% to 50%, and can burn wood
chips with a higher degree of humidity, but a large part of the energy is consumed in drying the material. Boiler
sizes are divided into three groups:
- 10-20kW small thermal power;
- medium 50kW of thermal energy;
- a large pot to 100 MW of thermal energy [[4]].
Oven theoretical capacity for air volume calculation is given by an equation (1):
Q = m·C·ΔT (1)
Where:
Q - amount of heat (kJ) 1kW=3600kJ;
C- specific heat (kJ/kg·C);
ΔT - the temperature difference between the outgoing and incoming temperature of the oven .
Oven ingested material thermal capacity is calculated by an equation (2):
Qsilt.piev.=m·ρ·C, (2)
Where:
Q - heat input capacity of the timber (MWh);
ρ - bulk density kg/m3
;
C- calorific value MWh/t
Woodchip furnaces may have different constructive solutions, but the operating principle remains the same to
them. Furnace operating principal flowchart view Fig 2. After the picture you can see that the furnace consists
of:
- Material supply which delivers fuel to the furnace for incineration. There are a number of ways, such as
material feeding the furnace with snails, conveyors, material supply with hydraulic mechanism;
- Primary air supply, the air is fed to the incineration of the material. Performances may be based on a
number of air supply fans, but in any case the primary air ensures the material drying, combustion and gas
formation;
- Secondary air supply, fed oxygen gas mixture in the furnace;
- Basically at issue one constructive solution with moving floors. Constructive solution can be seen Fig 2;
- Ash left over from the combustion process, in principle, all ovens are the same ash discharge operating
principles;
- The hot flue gas, which is used as heat media are used for all furnaces.
3. Research of Woodchip Automation System Modernization Boiler Using O2 Concentration..
58
material supply
primary air
secondary air
furnace
hot flue gas
ashes
FIGURE 2 . Furnace operation block diagram.
III. Automatic control systems.
Automation control systems designed to improve overall efficiency, reduce operating costs and
improve process control initially, the PLC is designed to replace relay logic systems and were programmed
ladder logic, this program system is strongly reminiscent of the relay circuit. Applications examples can be seen
in Fig 3. Such programming languages created to electronics engineers are able to easily understand the
functioning of the program and to develop it in order not to specifically attract programmers.
FIGURE 3. Ladder logic program example.
Woodchip furnace is a multi-complex system in which each system provides specific actions implemented.
Furnace control system:
- the material supply system;
- moving floor system, which is divided into four zones and moving the burning material in an oven;
- divided into four zones of the primary air supply system;
- divided into three zones of the secondary air supply system;
- ash transport system.
Oven operating block diagram is shown in Fig 4. The primary air ensures the material in the furnace combustion
FIGURE4. Woodchip boiler automation systems
There is process that produces the flue gas, which is then burned by providing secondary air.
Recirculation furnace aim is to process that produces the flue gas, which is then burned by providing secondary
air. Recirculation furnace aim is to prevent the furnace too high temperatures leading to the furnace may be
damaged. Furnace cooling circuits is cooled furnace important nodes that cannot be mechanically withstand
high temperatures. Similarly, furnace cooling circuits increases the primary and secondary air inflow
4. Research of Woodchip Automation System Modernization Boiler Using O2 Concentration..
59
temperature, thus speeding up the drying process of the material gas ignition processes. Woodchip furnace is
very widely applicable. Stoves can be used as a multi-storey home heating and up to a small village Woodchip
furnace is very widely applicable.
IV. Algorithm drum dryers for woodchip furnace automation system model management
Furnace automation control system is determined by both depression (underpressure) and the oxygen
concentration in the flue gas sensor. Depression value specified algorithm is a manufacturer recommended
approximate size, because it depends on the oven depreciation and material quality.
Below is the automatic furnace control algorithm by steps:
Step1. There shall be regulated material feed rate (determined in step 2 and 3).
Step 2. If the oxygen concentration is greater than 3% of the material is accelerated feeding rate of the furnace
floor speed, the primary air supply amount is increased to 10% and the secondary air supply is reduced. After all
sizes increasing move to step 4.
Step 3. If the oxygen concentration is less than 3% of the material is then slowed feeding speed in the oven and
floor speed, the primary air supply is reduced and secondary air supply amount is increased to 50%. After all
sizes increasing move to step 4.
Step 4. Adjusts HIDROLIK engine speed (down 2 and step 3).
Step 5. A change in the primary air feeding volume. 10% change steps 2 and 3, and 7 and 8 step variable amount
up to 90% limit.
Step 6. Secondary air feeding amount is changed in step 2 and 3.
Step 7. If the furnace current depression is less than 300 Pa, the primary air supply is reduced and after
parameter change switch to step 1;
if not less, then move on to the next step.
Step 8. If the furnace current depression is greater than 300 Pa, the primary air supply is being scaled up, and
move on to the first step; if does not - go to the next step.
Step 9. If the oven existing depression equal to 300 Pa, then, without changing anything, move on to the first
step.
FIGURE 5. The developed algorithm block diagram dryers for woodchip furnace
automation system model management.
Articles of combustible feed the furnace is controlled by the percentage of oxygen concentration in the
flue gas, that is, the percentage increase in oxygen concentration in the flue gas, the fuel for the furnace is
injected more frequently. This visual representation of the process, see Fig. 6.
5. Research of Woodchip Automation System Modernization Boiler Using O2 Concentration..
60
If the oxygen concentration in the flue gas falls below 2%, for security reasons, to avoid the formation of
explosive gas oven, exponentially it reduces the material supply.
OY axis Material handling and floor speed (%);
OX axis O2 concentration (%);
Curve creates a material feed rate and the floor movement's
dependence on oxygen concentration.
FIGURE 6. Oxygen concentration on the primary air supply amount.
OY axes secondary air supply volume (%);%
OX axis O2 concentration (%);
Curve creates a secondary air volume control the oxygen
concentration in the flue gas.
FIGURE 7. Secondary Air dependence on oxygen concentration
V. Conclusion
Analysing the scientific findings on woodchip furnaces and their applications, concluded that the
woodchip furnaces are used in the timber industry, which is due to more efficient use of wood as twigs wood
chips, bark and wood chips is surplus it when not in use should be discarded.
- Woodchip furnace high efficiency and simple operation principle because they are used for diverse
purposes;
- Significant differences in the use of furnaces, in particular, are used in a rotating drum drying particle
drying, used cogeneration plant for steam production, which cut turbine;
- Furnaces, which are used in drum drying are simplified operation principle of respect as the furnace
operation algorithms based on one variable;
- Oven, which is used in combined heat and power station is controlled by the oxygen concentrations in the
flue gas, and by comparison with other stoves concluded that the thus obtained more energy from the
burning material;
- When driving the drum drying ovens used in the oxygen concentration in the flue gas sensor, it would save
the fuel.
References
[1]. Energetika.lv. Koģenerācija. (tiešsaiste). 2012 (skatīts 2014.g. 10.dec.), http://www.energetika.lv/?lang=lat&p=3&id=5
[2]. EnPlant Engineering. (online). Sweden: EnPlant Engineering AB, (viewed 10 December 2014). Available from:
http://www.enplant.com/Docs/EnPlant_HGG_Biomass_Energysystem_Webb.1.1.pdf
[3]. INOS SIA. Koksnes žāvētavas (brikešu/granulu ražošanai). (tiešsaiste). (skatīts 2014.g. 8.dec.),
http://www.inos.lv/lv/siltumgeneratori--kurtuve--katls-zavetava
[4]. D.P. Kofman, H. Serup, H. Falster, C. Gamborg, et al. Wood for Energy Production. Technology – Environment – Economy. Irish
Edition. Dublin: COFORD, 2005. 72 p. ISBN 1 902696 43 3.
[5]. Lambda Sensor 20 question & answers (online) England: NGK Spark Plugs (UK) Ltd, GADS (viewed 11 January 2015). Available
from: http://ngkntk.co.uk/wp-content/uploads/2011/03/Lambda-Sensor-20-QAs.pdf
[6]. L-ENZ Birstošu produktu žāvēšanas iespējas. Efektīva siltuma enerģijas izmantošana. Aizkraukle: SIA PAKAVS „Viss
Lauksaimniekam”, 2013. 12 lpp. http://www.biogasheat.org/wp-content/uploads/2013/11/6_Siltuma_izmantosana_Vecsiljani.pdf
[7]. D. Palmer, I. Tubby, G. Hogan, W. Rolls, Biomass heating: a guide to medium scale wood chip and wood pellet systems.United
Kingdom, Farnham, Surrey: The Biomass Energy Centre, 2011. 20 p.
6. Research of Woodchip Automation System Modernization Boiler Using O2 Concentration..
61
[8]. http://www.biomassenergycentre.org.uk/pls/portal/docs/PAGE/BEC_TECHNICAL/BEST%20PRACTICE/37821_FOR_BIOMAS
S_2_LR.PDF
[9]. E. Römpczyk, Gribam ilgtspējīgu attīstību. Rīga: Friedrich-Ebert-Stiftung, 2007. 152 lpp. ISBN 978-9984-9948-0-2
[10]. Siemens-vai.com Electrics and automation for electric arc furnace. Enhancing the performance of your electric arc furnace.
Answers for industry. ([online). Linz, Austria: Siemens VAI, Metals Technologies GmbH, 2012 (viewed 28 December 2014 ).
Available from: http://www.industry.siemens.com/datapool/industry/industrysolutions/metals/simetal/en/Electrics-and-automation-
for-electric-arc-furnace-en.pdf
[11]. The Physics Classroom. Measuring the Quantity of Heat. (online). 1996-2015. (viewed 10 January 2015). Available from:
http://www.physicsclassroom.com/class/thermalP/Lesson-2/Measuring-the-Quantity-of-Heat
[12]. A.Tooma, , Vai kurināt koksni ir netradicionāli? Vides Vēstis. 2004, 11 (74), http://www.videsvestis.lv/content.asp? ID=74&
what=36.
[13]. H. Vīgants, Enerģijas patēriņa prognozēšana koksnes granulu ražotnei ar nestabilu elektroenerģijas patēriņu. Maģistra darbs. Rīga:
RTU, 2011. 70 lpp.
[14]. J. Vos, Biomass Energy for Heating and Hot Water Supply in Belarus Best Practice Guidelines Part A: Biomass Combustion
Project No. BYE/03/G31. The Netherlands: BTG Biomass Technology Gropu BV, 2005. 118 p.
http://energoeffekt.gov.by/bioenergy/htdocs/en/practa.pdf
[15]. V. Znotiņa, Latvijas mežu vēsture. (tiešsaiste) 2014. (skatīts 2015.g. 11.janv.), http://latvijas.daba.lv/biotopi/mezi.shtml#v147