Ash handling system ppt download

Operation and maintenance of coal handling system in thermal. Ash handling system power plant engineering amit mak youtube. Pdf operation and maintenance of coal handling system in. Ash collected in economiser, primary air heater and secondary air heater hoppers drops continuously through suitable vertical pipe. These conveyors are often referred to as air slides. Macawber beekay, ash handling system india, bottom ash. A pc boiler generates approximately 80% fly ash and 20% bottom ash. Ash handling options for coalfired power plants power. Ash from the various collecting points is pneumatically conveyed to the ash storage silo and is unloaded at regular. Sbm mining machinery is a professional material processing designer and supplier in the. Such ash can be a considerable environmental nuisance as well as being awkward to handle due to its abrasiveness and hydroscopic characteristics. 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. Very finely sized fly ash often accounts for the major portion of the material conveyed in an ash handling system. Detroit ash handling systems are designed for effective, economical and trouble free disposal of ash from units burning coal or solid refuse fuels.

Ash handling systems bevcon wayors bulk made simple. 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. The fly ash system handles the majorlargest fraction of total ash. 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. This system is suitable, where coal is to be transferred over shorter distance and.

Sodalime glass, since it constitutes 77 percent of total glass production, is discussed here. Maintenance of ash handling plants and pneumatic conveying. 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. Sodalime glass consists of sand, limestone, soda ash, and cullet broken glass. Factors like availability of other resources like water, land etc.

Pneumatic conveying design guide nong lam university. Bottom ash water recirculation system complete with dewatering bins, settling tank and surge tank facility. Vacuum system includes conveying of fly ash from various fly ash hoppers up to the intermediate buffer surge hopper ish located near esp. Ash handling plant an overview sciencedirect topics. Systems that use impounded hoppers or submerged scrapper conveyors have traditionally handled ash using water as a primary medium. 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 fly ash gets collected at various points, with most of it in esp hoppers. The correct procedure to wear cloth is head to be covered first followed by coat. 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. Description of ash handling plant in thermal power plant operation. The search for actions that can minimize speed variations in. Coal handling plant consists of track hopper,feeders, conveyor system, roller screen, crusher, stacker reclaimer, compressor,dfds system,ttr,pumps etc.

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. Coarse ash material such as bottom ash is most often crushed in clinker grinders crushers prior to being transported in the ash conveyor system. 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. You can also choose from conveyor system ash handling system, as well as from carbon steel, stainless steel ash handling system there are 271 suppliers who. An example of this method is presented in 1, regarding operation and maintenance of coal handling system in a thermal power plant. The schenck process method of fly ash handling is clean, efficient and fully enclosed, with exceptional reliability and requiring minimum. Compared with actual situation of the current thermal power plant, this paper studies operation process of coal handling system in thermal power plant. Fly ash is the major constituent of the ash generated from pulverized and fluidized bed coalfired boilers. 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. Ash handling systems ppt free download as pdf file. With options varying from fly ash to bottom ash conveyors, and pneumatic versus mechanical ash handling systems, our experts are ready to. This permits intermittent, controlled removal of the material, conserves power, and reduces the amount of time required for the system to operate.

Assemblage of this information will provide a single point of reference that might otherwise be time consuming to obtain. Our offered range of handling system is widely used in various industries like sugar industry, foundry industry and fertilizer industry. One important, but often overlooked factor of an efficient ash handling system, is its compatibility with your facility. 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. One of the methods for handling fly ash is wet system in which the ash is mixed with water to form slurry which is. System comprises of water impounded refractory lined bottom ash hopper bah of adequate capacity with water seal trough and dip plates. 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. Types of ash handling system in power plant engineering 1. Ppt basic food hygiene powerpoint presentation free to. Bottom ash handling system macawber beekay, bottom ash. For this second edition of the pneumatic conveying design guide i have followed a.

Jun 01, 20 ash handling system presentation transcript. 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. Ash handling system final free download as powerpoint presentation. 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. Ash handling system backed by strong expertise and knowledge, we manufacture and present best quality ash handling systems. 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. The system has to be selected based on many factors like type of boiler, size of boiler, amount of bottom ash generated, method of final handling etc. Macawber beekays product profile includes jet pumping system for intermittent removal of bottom ash collected at furnace bottom of pf type boilers. Retrofit of all ash handling and storage systems for 2 x mwatt boilers including.

These materials are then transferred through a gravity feed system to a weigher and mixer, where the material is mixed with cullet to ensure homogeneous melting. Oct 15, 2017 types of ash handling system in power plant engineering 1. Coal handling system coal handling plant in thermal. A large quantity of ash, is produced in steam power plants using coal.

Mechanized ash handling systems developed as the size of coal fired boilers increased. Operation and maintenance of coal handling system in thermal power plant j. Scribd is the worlds largest social reading and publishing site. This system is suitable, where coal is to be transferred over shorter distance and space limitations exist. Coal handling plant coal unloading system conveyor system crushing system feeding system. Ash handling system ntpcbrbcl 2504 mw submitted by. Operation and maintenance of coal handling system in. Ash conveying systems densephase pneumatic conveying. General layout of thermal power plant site selection criterion of thermal power plant coal preparation. Introductionin thermal power plants the ash handling practicescoal based solid waste are collected as i. Ducon supplies both wet and dry type ash systems for power plants. Ash handling systems may employ pneumatic ash conveying or mechanical ash conveyors.

Ash handling systems ducon supplies both wet and dry type ash systems for power plants. It is absolutely essential to have an efficient fuelhandling system in power plants. 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. By absorbing the advanced technology from the world, we researched and. Ash handling systems may employ different forms of pneumatic ash conveying or mechanical ash conveyors. Wear protective clothing which is washable,lightcoloured without external pockets.

Ash handling system ash handling systemhandling of dry wet coal and coal mill rejects. 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. Analyze technical characteristics of coal handling system and operating characteristics of the relevant machinery and equipment. In a typical pyrites transporting system, the mill rejects are moved to a tank for storage until they are taken to the bottom ash sluice pipeline system. Ash handling system power plant engineering amit mak. Such ash can be a considerable environmental nuisance as well as being awkward to handle due to its abrasiveness and hydroscopic. Demech provides variety of systems to handle bottom ash or bed ash generated by the solid fuel fired boilers. Dense phase pneumatic system conveying speed is low.

A power point presentation on ash handling system made by me and my friends. Boilers burning pulverized coal pc have bottom furnaces. Since a majority of the power plants operate using coal as a fuel, it is necessary to study about coalhandling system. This information will help to achieve increased reliability at a decreased cost.

Wet ash handling systems project engineering division. In a coal based thermal power plant, the initial process in the power generation is coal handling. 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. 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. Coal is transported in thermal power station either by railways,roadways or rope ways. Wet ash system is can be utilized for bottom ash handling with water impounded hopper and jet pumps for intermittent removal.

Both moisture and ash are determined after equilibrating at 60 percent relative humidity and 400c temperature as per relevant. Coal handling system coal handling plant in thermal power plant. Jun 23, 2015 for years, wet bottom ash handling has been the standard for power plants throughout the world. The controlling system used is typically a plc programmable logic controller with an hmi humanmachine interface for display connected to a central control system. Ash handling system of a thermal power plant slideshare. When the ash storage pond at tennessee valley authoritys tvas kingston fossil plant in harriman, tenn. This is a zero pollution plant for bottom ash removal. Ewb ash handling and other bulk material handling technologies can cover all requirements. 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. Nov, 2016 the initial process in coal based thermal power plant is coal handling. The initial process in coal based thermal power plant is coal handling. When it comes to ash handling, that means replacing water with another common medium. It suffers from the drawbacks that the power consumption is high and there is considerablewearofscrew.

Other than stacking, the stacker does three basic movements. Coal handling plants a complete details about chp equipments. Vacuum type pneumatic system clear space is available below esp area. Protective clothing should not be worn outside the food. These systems frequently continue to burn bottom ash, using ambient air instead of water during the extraction and cooling phases.

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