Generally the power plants prefer dry fly ash disposal instead of making ash slurry from the fly ash and the reason is that the fly ash collected. Detroit ash handling systems are designed for effective, economical and trouble free disposal of ash from units burning coal or solid refuse fuels. Wherever coal is burned it is necessary to have an efficient ash handling system, especially in a coalfired power station environment where large quantities of pulverized fuel ash pfa are created. It suffers from the drawbacks that the power consumption is high and there is considerablewearofscrew. Ash handling system backed by strong expertise and knowledge, we manufacture and present best quality ash handling systems. Force required for moving the solids mass through the conveying pipeline. Ash handling plant an overview sciencedirect topics. 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. Such ash can be a considerable environmental nuisance as well as being awkward to handle due to its abrasiveness and hydroscopic characteristics.
Coal handling plant equipment ppt,coal handling and ash handling systems ppt ashrant coal handling plantppt coal scribd all equipment of coal handling plant shall be suitable for 24 hours a day. In view of above, ash handling system covers evacuation of ash and its disposal in wet, semi wet and dry form and consists of numerous equipment which works in. The search for actions that can minimize speed variations in. Retrofit of all ash handling and storage systems for 2 x mwatt boilers including bottom ash, fly ash, pyrites, back pass and air heater ash positions. Types of ash handling system in power plant engineering 1.
Since a majority of the power plants operate using coal as a fuel, it is necessary to study about coalhandling system. Ash handling system in thermal power plant ash handling plant. Ash handling system we are a leading manufacturer of ash handling system or dense phase pneumatic conveying system, pneumatic conveying systems for fly ash, ash intake valve for fly ash handling, flushing apparatus for fly ash and vacuum systems for fly ash from gurgaon, india. Wet ash handling system wet type systems have water impounded hopper and jet pumps for intermittent removal the bottom ash fall into a wtype water impounded water filled ash storage hopper the stored ash is removed by means of jet pumps and transported in slurry pipe lines to the ash slurry sump for its further disposal. Ash handling equipment is one of the most crucial links in the solid fuel, biomass boiler, and combustion systems chain.
In a coal based thermal power plant, the initial process in the power generation is coal handling. Bottom ash is mostly coarse in nature hence it needs to be further crushed before being transported to ash handling system. Ltd dcips, a premier organization of its kind in india, renders turnkey project execution services that include design, manufacture, supply, installation and commissioning followed by operation and maintenance of ash handling plants for large thermal power stations and industrial boilers. Our offered range of handling system is widely used in various industries like sugar industry, foundry industry and fertilizer industry. Oct 15, 2017 types of ash handling system in power plant engineering 1. Fly ash is the major constituent of the ash generated from pulverized and fluidized bed coalfired boilers. The large ash particles are collected under the furnace in a waterfilled ash hopper, fly ash is collected in dust collectors with either an electrostatic precipitator or a baghouse. Cooling of the ash takes place through cold air, which is to a.
The fly ash gets collected at various points, with most of it in esp hoppers. Coal handling plants a complete details about chp equipments. Pressurized pneumatic ash conveying may also be employed. Ash conveying systems densephase pneumatic conveying.
In fly ash handling system, the major objective is to collect and transport the fly ash from the ash hoppers of the esp to the fly ash silo or to the ash slurry making tank. The initial process in coal based thermal power plant is coal handling. Pdf operation and maintenance of coal handling system in. Ash handling systems ppt free download as pdf file. Maintenance of ash handling plants and pneumatic conveying. Wear protective clothing which is washable,lightcoloured without external pockets. Nov, 2016 the initial process in coal based thermal power plant is coal handling.
Zenz and othmer state that this pressure drop, for both dilute and dense phase conveying, is composed of six effective forces. Scribd is the worlds largest social reading and publishing site. One of the methods for handling fly ash is wet system in which the ash is mixed with water to form slurry which is pumped to slurry pit. Introductionin thermal power plants the ash handling practicescoal based solid waste are collected as i. 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.
Macawber beekays product profile includes jet pumping system for intermittent removal of bottom ash collected at furnace bottom of pf type boilers. Dry ash handling presentation free download as powerpoint presentation. Find local tender for ash handling system, download ash handling system tender. The correct procedure to wear cloth is head to be covered first followed by coat.
On this channel you can get education and knowledge for general issues and topics you can sponsor us by sign up by clicking on this link. 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. Coal handling plant consists of track hopper,feeders, conveyor system, roller screen, crusher, stacker reclaimer, compressor,dfds system,ttr,pumps etc. In this system ash cooled by water seal falls on the belt conveyor and is carried out continuously to the bunker. Fly ash handling wherever products are burned it is necessary to have an energy efficient ash handling system, especially in a power station environment where large quantities of pulverized fuel ash pfa are created. Ducon supplies both wet and dry type ash systems for power plants. Found in plants around the world, ash handling systems are set up in harsh environments where they endure intense temperatures.
Fly ash handling system macawber beekay specializes in dense phase pneumatic conveying system. Fly ash handling in thermal power plants thapar university, patiala, india, 10. Ash handling system power plant engineering amit mak. The fly ash system handles the majorlargest fraction of total ash. 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. The design of the ash handling plant is dependent upon the method of ash disposal. 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. The system operates on a batch mode for the first stage conveying system and on a continuous mode for second. Over the last four decades, it has successfully executed a large number. 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. Ppt thermal power plant powerpoint presentation free. Operation and maintenance of coal handling system in thermal.
Ash handling pneumatic conveying handling system from schenck. Coal handling plant in a thermal power generating station. Very finely sized fly ash often accounts for the major portion of the material conveyed in an ash handling system. Environmental protection epa to create new regulations for ash handling that will. An example of this method is presented in 1, regarding operation and maintenance of coal handling system in a thermal power plant. It may be pumped into a disused quarry or transported from the power. Fly ash conveying system vacuum system from solid fuel fired boilers of various types. 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. Ppt thermal power plant powerpoint presentation free to. Boilers burning pulverized coal pc have bottom furnaces. Ppt basic food hygiene powerpoint presentation free to. Bottom ash handling system scrapper chain and belt conveyor fly ash. Ash generated in power plant is about 30 40% of total coal consumption and hence the system is required to handle ash.
Generally the power plants prefer dry fly ash disposal instead of making ash slurry from the fly ash and the reason is that the fly ash. Ash handling system of a thermal power plant slideshare. Sodalime glass consists of sand, limestone, soda ash, and cullet broken glass. 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. Recommendation bottom ash handling system scrapper chain and belt conveyor fly ash handling system dense phase pressure type ash. Mar 22, 2018 4b engineers whtsapp group for 2020,2021,2022 pass out students 4b engineers whtsapp group 2019 pass out stu. This is a zero pollution plant for bottom ash removal. Ash handling system tenders online latest info about ash. Bottom ash handling system macawber beekay, bottom ash.
Ash collected in economiser, primary air heater and secondary air heater hoppers drops continuously through suitable vertical pipe. System comprises of water impounded refractory lined bottom ash hopper bah of adequate capacity with water seal trough and dip plates. Bottom ash water recirculation system complete with dewatering bins, settling tank and surge tank facility. Ash from the various collecting points is pneumatically conveyed to the ash storage silo and is unloaded at regular periods for final disposal without creating a dust nuisance. Coal is transported in thermal power station either by railways,roadways or rope ways. The entire water requirement of the ashhandling system may be met with circulating water where the plant does not have a cooling tower facilitythat is, for a oncethrough system in coastal stations using lake or river water, or seawater. Such ash can be a considerable environmental nuisance as well as being awkward to handle due to its abrasiveness and hydroscopic. Protective clothing should not be worn outside the food. Get latest info on ash handling system tenders at tender detail. Ash handling equipment ash handling system latest price.
Sodalime glass, since it constitutes 77 percent of total glass production, is discussed here. When the ash storage pond at tennessee valley authoritys tvas kingston fossil plant in harriman, tenn. The zenith is the professional mining equipments manufacturer in the world, located in china,india, along with other asian marketplaces to develop and develop, now we. In electrical systems and equipment third edition, 1992. Are those electronic equipments products that connect with power plug. Ash handling options for coalfired power plants power. Vacuum system includes conveying of fly ash from various fly ash hoppers up to the intermediate buffer surge hopper ish located near esp. In this technology, fly ash and bottombed ash can be mixed with the necessary makeup water to produce homogenous dense slurry to be discharged to the ash disposal area by the dense slurry transport pumps. Ash handling system final free download as powerpoint presentation. Generally, an ebook can be downloaded in five minutes or less. A power point presentation on ash handling system made by me and my. This results in a lower cost, because there is no need to dispose of or treat the water that is used in a. Ppt ewaste powerpoint presentation free to view id. Coal handling system coal handling plant in thermal.
One of the methods for handling fly ash is wet system in which the ash is mixed with water to form slurry which is pumped to. Jun 23, 2015 for years, wet bottom ash handling has been the standard for power plants throughout the world. A free powerpoint ppt presentation displayed as a flash slide show on id. Macawber beekay, ash handling system india, bottom ash. 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. Wet ash handling systems project engineering division. Normally positioned on top of a silo or storage hopper, it performs the principal separation between ash particulates and the ash conveying air flow by means of cyclonic action forces. Ash handling systems have experienced gradual changes since the 1970s, but the kingston event triggered the u. One important, but often overlooked factor of an efficient ash handling system, is its compatibility with your facility. 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 collected in economiser, primary air heater and secondary air heater hoppers drops continuously through suitable vertical pipe connections to the flushing connections provided beneath each of the hoppers. Introduction in india 65% of total power is generated by the thermal power stations. These systems frequently continue to burn bottom ash, using ambient air instead of water during the extraction and cooling phases. A pc boiler generates approximately 80% fly ash and 20% bottom ash. Ash handling systems may employ pneumatic ash conveying or mechanical ash conveyors. Operation and maintenance of coal handling system in thermal power plant j. System comprises of water impounded refractory lined bottom ash hopper of adequate capacity with water seal trough and dip plates, allowing free expansion of the. A large quantity of ash, is produced in steam power plants using coal. This brochure in the next pages is giving an overview about ewb technical capability and. Ash handling system power plant engineering amit mak youtube. Systems that use impounded hoppers or submerged scrapper conveyors have traditionally handled ash using water as a primary medium. 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. Systems of mechanical conveyance and elevation are described, comprising ash cars, skip hoists and bucket conveyors.
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