Often problems like this which are encountered in such systems, this paper will provides the solution. Power plant fly ash material handling system upgrade. Bop system include coal handling plant, ash handling plant, fuel oil handling. In the thermal power plants maximum requirements of fuel is a coal. One important, but often overlooked factor of an efficient ash handling system, is its compatibility with your facility. Lihua zhao, yin lin worked for the typical failure analysis and processing of the belt conveyor 1, they both have also worked for the operation and maintenance of coal handling system in thermal power 2 plant. Power plant engineering unit 02, coal, ash and dust. Ash handling free download as powerpoint presentation. In a coal based thermal power plant, the initial process in the power generation is coal handling. United conveyor corporation manufacturers representatives. The plant was built in 1926 and at the time of its completion was the largest fossil fuel generating station of its kind in the world, capable of producing over 400,000 horsepower and 766. A thermal power station is a power plant in which the prime mover is steam driven. July 2005 power plant byproducts american coal ash. In the coal based thermal power plants, where the initial process to generate electricity is the handling the huge or tremendous amount of coal.
This complete process is empirical based,so that, in these systems the problem do arises. Maintenance of ash handling plants and pneumatic conveying. The control systems used for these conveyors are important for operating safe plant. Maintenance and repair consists of replacing nozzles and throat combining. In a coal based thermal power plant, huge amount of ash is generated which has to be. Pdf energy requirements for the developing countries in particular are met from. Fly ash from thermal power plants waste management and overview article pdf available in current science 10025.
Aug 09, 2016 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. A mechanical ash handling system is often the best choice for fluidized bed ash where headroom is restricted under. Pdf there is need for innovation in the areas of coal handling and conveying technology in indian thermal power plants to address issues of. Requirement of ash handling system in thermal power plant s coal is generally used as fuel and hence the ash is produced as the byproduct of combustion. Power plant engineering unit 02, coal, ash and dust handling system faculty. The environmental aspects are to be considered during planning and design stage of ash dyke it self. Sankaran page 3 of 24 the main objectives of primary preparation are. The slurry is transported thru trench upto slurry sump. Ash handling system power plant engineering amit mak. Tecpro, since 2002 is one of the fastest growing epc companies in the core sector. The burned coal converted into ash, and this ash is stored into the bottom ash hopper. Fly ash, particulate matter, thermal power plants, waste management.
The total power consumption for the complete ash handling plant of two 2 units shall be worked out by using the following formula. Coal and ash circuit coal produced in mining site is transported to power plant site it contains coal handling equipements for generation of steam the combustion of coal produces ash which is collected and removed to ash storage yard through ash handling equipements. Ash handling systems may employ different forms of pneumatic ash conveying or mechanical ash conveyors. Basically this is nothing but the residual part of the coal. Usually coal will be transported to plant through railway wagons if it is a pithead power station t. Wet system in this system ash conveying media is water. In cogenerationcombine cycle plants, all controls other than gas turbines. Sankaran page 5 of 24 coal unloading for unloading coal in all modern power stations, mechanical unloading devices are required as number of wagons arrived every day is large. Coal handling plant of thermal power station seminar reportpdfppt download abstract.
A typical ash handling system may employ vacuum pneumatic ash collection with ash conveying from several ash pick up stations and resulting in delivery to an ash storage silo for interim holding prior to load out for disposal or reuse. Coal handling plant of thermal power station seminar report. The flyash produced in the thermal power plant needs to be disposed outside the plant premises so that it causes least disturbance to the main plant operation. Ash handling options for coalfired power plants power. Management of ash disposal guru nanak dev engineering. May 07, 2014 requirement of ash handling system in thermal power plants coal is generally used as fuel and hence the ash is produced as the byproduct of combustion.
Ash generated in power plant is about 30 40% of total coal consumption and hence the system is required to handle ash for its proper utilization or disposal. Ash handling system of coalfired power plant is a advanced, economic, environmental science and technology. Jun 25, 2011 fly ash from thermal power plants waste management and overview article pdf available in current science 10025. Power plant byproducts three general classes of byproducts from electric power plants can be used in the manufacture of portland cement. Conveyors are seen on virtually all in the coal handling plant chp. Ucc is the industry standard for abrasive material handling systems, dry sorbent injection dsi and reagent handling. Little research is carried out in this direction is by lihua zhao, yin lin. Conveyors leading to crusher house have facility for manual stone picking, at a. Almost all chp these days implies reactive maintenance with support of preventive maintenance. This complete process is empirical based,so that,in these systems the problem do arises. List requirements of good coal handling plant and list various stages of coal. This book addresses issues related to both coal fired and steam power plants. India has large deposit of coal about 170 billion tonnes, 5th largest in world. 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.
Coalfired power station an overview sciencedirect topics. Coal handling plant of thermal power station seminar report pdf ppt download abstract. Automation of ash handling plant ash disposal system consist of two slurry tank. The leachability of heavy metals from fly ash, bottom ash, dumping site ash, cement, and brick samples admixtured with fly ash in the area of a thermal power plant were compared.
Draw general lay of modern steam power plant label major component and state. Find details of companies offering ash handling systems at best price. Flue gases and super heater in thermal power plant mcqs wi. Bottom ash is mostly coarse in nature hence it needs to be further crushed before being transported to ash handling system. The disposal of the increasing amounts of solid waste from coalfired thermal power plants is. Operation and maintenance of coal handling system in. After the dewatering at the sloping portion, moist ash is discharged to clinker crusher for onward disposal either through hydraulic sluice way to slurry pond or through belt conveyors to bottom ash storage silo for onward disposal. Pressurized pneumatic ash conveying may also be employed. A theoretical investigation of efficiency enhancement in. Question bank for gtu exam thermal power plant high pressure. Ash handling systems may employ pneumatic ash conveying or mechanical ash conveyors. Mechanized ash handling systems developed as the size of coal fired boilers increased beyond the sizes permitting manual handling of large quantity of ash.
Plant services page 1 of 7 annexure b major ash handling contracts now under execution by dc industrial plant services private limited sl. Coal handling plant in a thermal power generating station. A large quantity of ash, is produced in steam power plants using coal. An intelligent conveyor control system for coal handling. Watson power has represented united conveyor ucc for over 50 years. Coal handling plant of thermal power station seminar. Ash handling system in thermal power plant ash handling. Bottom ash handling system macawber beekay, ash handling. 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. Power plant fly ash material handling system upgrade in 2016 tp automation was contracted to upgrade the fly ash handling system at a local power plant. More than 60% of electric power is produced by steam plants in india.
Ash produced in about 10 to 20% of the total coal burnt in the furnace. A typical pneumatic ash handling system will employ vacuum pneumatic ash collection and ash conveying from several ash pick up stationswith delivery to an ash storage silo for interim holding prior to load out and transport. Coal and ash handling in thermal power plant mcqs with. Mbe acquired stateoftheart technology from ewb hungary, a world leader in the field for all types of ash and powdered material handling systems.
With options varying from fly ash to bottom ash conveyors, and pneumatic versus mechanical ash handling systems, our experts are ready to help evaluate which application is best for your plant. V targets for fly ash utilization for thermal power station in operation as on 03. The design of the ash handling plant is dependent upon the method of ash disposal. Pdf fly ash from thermal power plants waste management and. Two methods are in practice to dispose off the generated flyash. Thermal power plant pressure dense phase pneumatic ash plc. With options varying from fly ash to bottom ash conveyors, and pneumatic versus mechanical ash handling systems, our experts are ready to.
In thermal power plants coal is generally used as fuel and hence the ash is produced as the byproduct of combustion. Ash handling plant an overview sciencedirect topics. Environment impact assessment of thermal power plant for. Pdf operation and maintenance of coal handling system in. Requirement of ash handling system in thermal power plants coal is generally used as fuel and hence the ash is produced as the byproduct of combustion. Explain with neat sketch working of steam and gas combine cycle power plant. Ash handling plant in thermal power plants the ash handling practicescoal based solid waste are collected as i. United conveyor ash handling for the coal and power plants. Types of ash handling system in power plant engineering 1.
Operation and maintenance of coal handling system in thermal. Ash handling systems ducon supplies both wet and dry type ash systems for power plants. Mechanical ash handling system bevcon wayors bulk made simple. Unit1 thermal power stations introduction thermal energy is the major source of power generation in india. Typical plant water scheme for 2 x 500mw coal based thermal power. In a coal based thermal power plant, huge amount of ash is generated which has to be disposed off continuously. Mechanical ash handling system bevcon wayors bulk made. As the requirements and limitations of environmental protection, water resources and others, positive pressure pneumatic ash handling is widely used as ash handing method in chinas coalfired power plant. They are wet disposal and dry disposal methods with ash ponds being the most common methods of disposal in india. We cover northern ohio, western pennsylvania, western new york and ontario. Leaching characteristics of bottom ash from thermal power. Operation and maintenance of coal handling system in thermal power plant j.
Bottom ash ash generated below furnace of the thermal power plant is called the bottom ash. The objective of the delphi method is to acquire and aggregate knowledge from multiple. Pdf a need for innovation coal handling and conveying in thermal. I am glad that the standard technical specification for main plant package has been finalized by the committee. Yan, in advanced power plant materials, design and technology, 2010. Fly ash around 80 % of ash generated in thermal power plant is fly ash. Ash handling system power plant engineering amit mak youtube.
Differentiating between coal and impurities like hard lumps, stones etc. Mbe built the first ash handling plant for indian explosives limited, kanpur. Typically for a 2x500 mw plant based on indian coal, the amount of ash. Oct 15, 2017 types of ash handling system in power plant engineering 1.
A trial operation showed that mixed fly and bottom ash from a coal fued power plant can be reused as raw material for cement production 6. Thermal power plant tpp serves the above purpose, tpp has a nameplate generating potential of 286. Coalfired power stations are burning an increasingly varied range of fuels and fuel blends, including subbituminous and lower volatile coals and biomass of varying composition and combustion properties, under tight economic and environmental constraints. Bottom ash is extracted from the trough continuously using high quality chains, sprockets and bars.
It may be pumped into a disused quarry or transported from the power station for. He has published several research papers in the area of bulk solids handling in top international journals. Ash collected in economiser, primary air heater and secondary air heater hoppers drops continuously through suitable vertical pipe. When the coal combustion takes place in the boiler, some part of the coal remains unburnt and that unburnt particles are called the ash, which is approximately 26% to 40% of the total coal undergoing combustion. When the ash storage pond at tennessee valley authoritys tvas kingston fossil plant in harriman, tenn. Basically conveyors are dumb, but once equipped with proper control system they yield efficient and safe plant operation. Therefore, the ash can be conveyed by means of a pneumatic conveying system to the final silo figure 7.