Use of coal as a fuel in cement or power plant operations can present special problems to a plant operator because of the wide range of coals and quality of coal available on the market. The steam produced, under tremendous pressure, flows into a turbine, which spins a generator to create electricity. The plant suffered general dust, spillage and carryback problems throughout the coal conveying system. The basic theory of condition based preventive maintenance is to propose routine inspection to identify any degradation in the integrity of the systems during their service life and to provide an early warning in order that remedial action can be taken. In larger units, to reduce auxiliary power consumption and better steam utilization, a steam turbine is used to drive bfp in place of a motor. Usually coal will be transported to plant through railway wagons if it is a pithead power station t.
In brief we can say that receipt of coal from coal mines, weighing of coal, crushing it to required size and transferring the quantity of coal to various coal mill bunkers. Coal still is the main source of electricity products and for manufacture of steel and prime source of heat for boilers. Auxiliary power consumption an overview sciencedirect topics. This general introductory course provides some basic engineering concepts needed to understand how a coal fired power plant works, followed by a general overview of power plant layout and operating principles. Ash handling options for coalfired power plants power. Pdf automation of coal handling plant researchgate. Coal and ash handling in thermal power plant mcqs with answers. In case the coal is brought by railway wagons, ships or boats,theunloadingmaybedoneby carshakes,rotarycar dumpers,cranes. Coal and ash circuit coal produced in the mining site is transported to power plant site coal handling equipment for generation of steam the combustion of coal produces ash which is collected and removed to ash storage yard through ash handling equipments.
Many utility systems in the world have power plants operating with fossil fuel. Free time is calculated from the receipt of written intimation of coal rakes from mahagenco to the railway. Coal handling plant of thermal power station seminar report. In the thermal power plants maximum requirements of fuel is a coal. Since a majority of the power plants operate using coal as a fuel, it is necessary to study about coalhandling system. This is the responsibility and duty of the chp and its staff. Our mission is to create energyefficient solutions and offer the best engineering service and products to our customer. Figure 1 is a diagram of a typical pulverised coal combustion power station. The 400mw plant uses five pulverizers for bituminous and prb cases, and six for lignite. Thermal steam power plants mainly consists of 4 circuits. This general introductory course provides some basic engineering concepts needed to understand how a coalfired power plant works, followed by a general overview of power plant layout and operating principles. Expert systems and coal quality in power generation. Fire protection for power plants nfpa 850 enggcyclopedia. A coalfired power station or coal power plant is a thermal power station which burns coal to generate electricity.
Operation and maintenance of coal handling system in thermal power plant j. The initial process in coal based thermal power plant is coal handling. Chapter 7 coal if we as a nation are to benefit in the future from our enormous, lowcost coal reserves, a variety of efforts are necessary to 1 develop and demonstrate new clean coal technologies. The control system, which will replace the existing system, must overcome all the drawbacks of old system. Maintenance of critical equipments for coal handling plants chp of thermal power stations is typical job. Oct 07, 20 the first shows a typical example of a pulverized coal fired power plant coal handling system process flow diagram, and the second shows boiler general arrangement with classified hazardous locations.
The system, which is suggested, will work by only using tachometer, load cell and electronic cards in place of relays. For a coal handling plant tecpro provides a complete range of service which include. Coal and ash handling in thermal power plant mcqs with. This plant provided electrical power to customers in arizona, nevada, and california. Operation and maintenance of coal handling system in thermal. Find details of companies offering coal handling plant at best price. An intelligent conveyor control system for coal handling. Coalfired plants produce electricity by burning coal in a boiler to produce steam. Dec 14, 2017 muff coupling sleeve coupling is the simplest type of rigid coupling, consists of a hollow cylinder whose inner diameter is same as shaft. Coalfired power stations generate over a third of the worlds electricity but cause hundreds of thousands of early deaths each year, mainly from air pollution a coalfired power station is a type of fossil fuel power station.
Coal and ash handling a university reduces maintenance and increases efficiency with a complete coal and ash handling system download pdf challenge. This coal is transported up to the coal storage bunkers through conveyor belts. It is fitted over the ends of the two shafts by means of a gib head key. After burning of coal, 40 % of total coal consumption is converted into ash which need to be properly disposedoff from the thermal power plant. It also processes the raw coal to make it suitable for boiler opeartion. Limited india for 5 years, where he designed several coal and ash handling systems for thermal power plants. Coal handling plant of thermal power station seminar. Power plant engineering notes pdf ppe notes pdf book starts with the topics introduction, boiler, classification of boilers, fire tube boiler, water tube boilers, introduction, classification of.
Safe coal handling practices are designed to ensure that the fuel remains intact throughout its journey from the mine until the point at which it is ignited in the boiler. Muff coupling sleeve coupling is the simplest type of rigid coupling, consists of a hollow cylinder whose inner diameter is same as shaft. Coal conveyor belts should be of material designed to resist ignition. How a coal plant works coal fired plants produce electricity by burning coal in a boiler to produce steam. Ifcoalisdeliveredbytrucks,thereisnoneedofunloading device as the trucks may dump the coal to the outdoor storage. All major systems in the power plant will be discussed, from coal handling to the switchyard.
To ensure safe operation of a pulverized coal fuel system, operating parameters will change as the type of coal or blend of coals is varied. Thruster brake is a device to retard the speed of moving machinery and to stop it accurately to the desired position. Important parts of thruster brake brake shoe the thruster shoe brake has a pair of cast iron shoes which are lined up with friction pads. Development of condition based maintenance for coal. Coal from the coal wagons is unloaded by tipplers in the coal handling plant. Pdf operation and maintenance of coal handling system in. How coal is managed in the giant coal handling plants of. He has published several research papers in the area of bulk solids handling in top international journals.
An example of this method is presented in 1, regarding operation and maintenance of coal handling system in a thermal power plant. Coal handling plant in a thermal power generating station. Extraction steam is the main source of steam supply to this bfpt. Construction and maintenance of belt conveyors for coal. It also provided the power for pumping colorado river water for the central arizona project, supplying about 1. Ash handling system of a thermal power plant amay jain. In thermal power plants, coal is used as a fuel for generating electricity. Coal handling safety risks of unwanted combustion potentially causing injury, damage and downtime occur everywhere that coal is handled, processed or stored. The first shows a typical example of a pulverized coalfired power plant coal handling system process flow diagram, and the second shows boiler general arrangement with classified hazardous locations. The winters in the region are long and cold requiring a 7 month heating season. Introduction to thermal power plant general layout of thermal power plant site selection criterion of thermal power plant coal preparation coal storage ash handling electrostatic precipitator. The steam is then cooled, condensed back into water and returned to the. Indian coal is managed using giant coal handling plants chps. It is absolutely essential to have an efficient fuelhandling system in power plants.
Material classification and codification system as per is 8730 classification and codification of bulk materials being handled by continuous material. Coal handling is part of the larger field of bulk material handling, and is a complex and vital part of the coal fired power plant. Automatic sprinkler or water spray systems should be employed for fire protection of coal handling structures that are critical to power generation where coal or coal dust is likely to be accumulated. Coal is introduced through two hollow trunnions on each side of the tube. So in this article i will discuss the overall processes carried out at a coal handling plant in a thermal power plants. May 29, 2014 coal needs to be stored at various stages of the preparation process, and conveyed around the plant facilities.
Development of condition based maintenance for coal handling. To achieve the goal of safe, efficient, and economical coal firing system designs, both users and regulatory personnel must have an understanding of the hazards involved in coal fired systems and the nature of the problems involved in the use of pulverized coal. Operation and maintenance of coal handling system in. In either scenario, epa regulations will be more stringent with the elimination of wet ash handling and the phasing out of surface impoundments ponds for all coalfired power plants. The function of coal handling plant in thermal power plant is to receive, process, store, feed the coal bunkers consistently over entire life of the power plant. A coal fired power station or coal power plant is a thermal power station which burns coal to generate electricity. A power plants coalhandling system starts with a reclaim conveyor under the stockpile and makes its way to the coal gallery. Project overview the blcp power plant is situated in the map ta phut.
Electrical area classification in coalfired power plants. In either scenario, epa regulations will be more stringent with the elimination of wet ash handling and the phasing out of surface impoundments ponds for all coal fired power plants. Coal conveying system plagued by dust, spillage and carryback. Coal and ash handling in thermal power plant mcqs with answers q1. As the tube rotates, the balls tumble onto the coal,crushing and pulverizing it. May 04, 2017 coal still is the main source of electricity products and for manufacture of steel and prime source of heat for boilers. Muff coupling and muff coupling design coal handling plants. Peter muhlbach, abb automation gmbh, germany, discusses a complete materials handling solution for coal fired power plants. Carbon in ash gives it a dark color, and as a result the ash becomes unsuitable for certain applications. Coal fired power stations generate over a third of the worlds electricity but cause hundreds of thousands of early deaths each year, mainly from air pollution.
Coal handling plants chp tecpro provides complete turnkey system for coal lignite handling systems for captive and thermal power plants. Coal handling system coal handling plant in thermal. Almost all chp these days implies reactive maintenance with support of preventive maintenance. Coal is transported in thermal power station either by railways,roadways or rope ways. The whole system will work in an intelligent procedure which is faster, reliable and less maintaining cost. Bottom ash ash generated below furnace of the thermal power plant is called the bottom ash. The power is transmitted from one shaft to the other shaft by means of a key and a sleeve or muff. The search for actions that can minimize speed variations in. Ash handling system in thermal power plant ash handling. The coal is usually pulverized and then burned in a. Improving coal pulverizer performance and reliability.
Jun 17, 2010 analysis of coal chemical analysis of coal. This phenomenon results in internal agitation to the material on belt and therefore the materials external faces assume inclination at surcharge angle. So in this article i will discuss the overall processes carried out at a coal handling plant in a coal based thermal power generating station. Sample of coal is randomly collected from each rake and detailed chemical analysis, calculation of calorific value is carried out and is confirmed whether it is as per agreement with the coal mines or not. Coal and ash handling in thermal power plant mcqs with answers ahsan 071919 good information and some more info like size of coal and equipment descriptions or dictionary of these terms to be included. Jun 30, 20 it also processes the raw coal to make it suitable for boiler opeartion. Peter muhlbach, abb automation gmbh, germany, discusses a complete materials handling solution for coalfired power plants. Maintenance of critical equipments for coal handling plants chp.
The ash content in superior grades of coal can be as low as 6 to 8 %, but can be as high as 45% in poor grades. Table 1 is the stages that require monitoring in a coalfired power generating plants as shown in. Coal is then transported to the crush house by conveyor belts where it is crushed to small pieces and light dust is separated. Coal handling plant can handle coal from its receipt to storage, reclamation, preparation until the final point of use. A university in the northeastern part of north dakota needed to upgrade their central heating system. Impact mills grinding action is carried out by aseries of hinged or fixed hammers revolving in an improving coal pulverizer performance and reliability coal conveyer coal crusher raw coal bunker. Construction and maintenance of belt conveyors for coal and. Coal handling plant of thermal power station seminar report pdf ppt download abstract. There, twelve conveyors distribute the coal to six different bunkers that feed the plants three coalfired boilers. Hydraulic systems should only use listed fireretardant hydraulic fluids. In the coal based thermal power plants, where the initial process to generate electricity is the handling the huge or tremendous amount of coal. Swapan basu, ajay kumar debnath, in power plant instrumentation and control handbook, 2015.
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