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. Filter, ransom manufacturing ammonia storage tank, ash tech mechanical ash handling system, burton compressor corporation compressors and dryers, graham manufacturing condenser and air removal system, ultra industries fabric dust filter, l. Mechanical means are required for the disposal of ash. Cement, nonsilica sand, case study flyash, bottom ash. Mechanical ash handling material compressor pumps motors pipes ash conditioner. Pdf troubleshooting in dry fly ash conveying systems. What is the mechanism of pulverized fuel firing system. Vacuum system envisages conveying of dry fly ash from ash hoppers by vacuum pumps and collection in ish. This procedure applies to different types of conveyors used in coal handling plants in all operating sites of tata power group companies sl. All types of biomass can be effectively processed, conveyed, stored, and fed to power generation systems using andritz technologies. In all the modern power plants, high pressure boile rs 100bar are. May 24, 2016 allenshermanhoff in material handling business since 1917 over 2,000 ash removal systems installed in u. Ash handling plant an overview sciencedirect topics. Biomass handling systems for renewable energy production.
Electrostatic precipitator meaning an efficient flue gas cleaning device esp means electrostatic precipitator is a device have been used for over half a century to control particulate emissions or dust cleaning device in many industries like power plants boiler,cement and steel mills. Aug 12, 2015 ash handling systems hydraulic system pneumatic system mechanical system 7. Ash handling system are generally divided into three types fly ash handling system, bottom ash handling system and ash slurry disposal system. In all the modern power plants, high pressure boile rs 100bar are universally used as have following advantages. One ahu is located in the first floor kitchen and the other ahu is located in the family room off the kitchen.
Ash is conveyed manually, mechanically, pneumatically and hydraulically. Our products and systems hold longstanding patents on several wellknown technologies, and provide clean, safe and cost effective solutions for many diverse applications. After the bulk bag containing soda ash has been connected to the receiving hopper and the product begins to flow, the air inside the hopper is forced out. Maintenance of ash handling plants and pneumatic conveying. Bulk material handling is an engineering field that is centered on the design of equipment used for the handling of dry materials. Mechanical sampling systems proper sampling is the first critical step in determining the value of a cargo. Understand 1 8 explain about ash handling system and different types of ash handling equipments understand 1. We are a world leader in the design and supply of pneumatic conveying systems for dry bulk materials.
For the mechanical conveying of fly ash schenck process has considerable expertise and experience in the power sector with the enmasse chain conveying system. Introductionin thermal power plants the ash handling practicescoal based solid waste are collected as i. If the fly ash is being pneumatically conveyed into a processing system, the blower used to move fly ash through the air line must be sized to meet the demands of the system. Prevention of deposit formation in boiler units 22. Bulk materials are those dry materials which are powdery, granular or lumpy in nature, and are stored in heaps. What are the three major factor consider for ash disposal system. Andritz is a global supplier of proven biomass processing solutions for the renewable energy industry.
Electrostatic precipitator meaning boiler and mechanical power. A second stage system positive pressure system is employed to convey fly ash from ish to main fly ash silos. Jun 16, 2011 fly ash handling system description and evaluation 2. Metso centrifugal air classifier for fly ash processing. It may be pumped into a disused quarry or transported from the power. A sh was also awarded the two largest ash handling system contracts ever tendered at that time, both for taiwan power companys taichung station. Metso in filtration metso corporation pdf catalogs. Manage, direct and lead teams made up of ae firms, consultants, contractors, construction. Each vacuum pump, dedicated to a stream, can convey both coarse and fine ash. Manufacturing and assembly facility in lancaster, oh, usa manufacturing and assembly facility in wuhan, prc. The particles collected on the collecting electrodes are removed by impact force of mechanical hammering system. 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. Productivity improvement in automated material handling.
Efficiency of steam power plant the power plant that operates on coal constitutes almost 41% of the worlds electricity generation. Mechanical pulp technology for mechanical pulp producers. Modifications are carried out in this automated material handling system used in liquor manufacturing plant, one at conveyor system and other at crushing section. The fly ash system handles the majorlargest fraction of total ash. Scraper chain convey or and apron convey ors, dry and wet type temperature screw conveyor double clapet valves and high temperature special valves fig. Both hp and lp water pumps are utilized in a bottom ash handling system. Mechanical ash handling material compressor pumps motors pipes ash conditioner silos clinker grinder dome valve assembly bag filter ash hoppers ceramic bend. These modifications have resulted in a great productivity improvement. While conventional wet bottom ash handling systems used to process bottom ash. Coal handling plant in a thermal power generating station. Flexicons flexible screw conveyors are simple, compact, and widely used to convey soda ash horizontally. Electrostatic precipitator meaning boiler and mechanical.
It is the modified rankine thermodynamic cycle on which the coal fired power plant operates. Ucc system components and ash handling parts are specifically designed to last longer and outperform in high temperature, abrasive environments. Ash handling system 39 bottom ash system 39 fly ash system 39 ash water system 40 ash slurry system 40 regenerative system 40 hydrogen cooling system 41 rotor coupling and bearing 42. From there it is pumped out by suitable rotary pumps. Bottom ash highpressure water supply pumps are used to extract bottom ash from the furnaceeconomizer. Ash handling systems may employ different forms of pneumatic ash conveying or mechanical ash conveyors. Amc for mechanical maintenance of ash handling plant including ash water recovery system,hcsd systemand mill reject handling system 02 parts bidders having the following criteria shall only be considered to be qualified in the technocommercial bid. Ppe ppe coal ash coal ash handling systems mechanical engineering department ssas institute of technology, surat. In a coal based thermal power plant, huge amount of ash is generated which has to be disposed off continuously. Modern mechanical stokers consist of four elements, 1 a fuel admission system, 2 a stationary. The energy efficiency of a conventional thermal power station is defined as saleable energy produced as a percent of the heating value of the fuel consumed. The bottom ash quantity is around 20% of the total ash generation and there are mainly two types of bottom ash disposal systems. Bulk material handling systems customengineered solutions from concept to commissioning ecc division, bulk material handling business unit, mount poonamallee road, manapakkam, chennai 600089.
Handling system 02 parts bidders having the following criteria shall only be considered to be qualified in the technocommercial bid. Company overview california department of industrial. The artificial draught is produced by a fan and it is known as fan mechanical draught. Allenshermanhoff advances its technology development in dilutephase transport systems, pressure densephase transport systems and mechanical drag conveyors. Mechanical systems typically include submerged or dryflight conveyors, screw. Dry bottom ash handling system improving maintainability and. Boiler operation engineering questions and answers pdf.
Soda ash has been identified as an eye and lung irritant, meaning the systems used to transport it should be equipped with dust collection devices. The ash handling system is an essential system for power plants, and a customized solution that handles ash from boiler, economizer, air preheater and esp. Fly ash handling system thru pneumatic vacuum conveying. Annexure i odisha power generation corporation limited ib. Heat is transferred from the fire and combustion gases to water tubes on the walls of the boiler. The removed dust is stored in hoppers and is transported to the ash silo by an ash handling system. The ash handling system may be dry dry pneumatic conveying is more popular now on account of retention of original characteristics of fly ash and its utilization, semiautomatic wet, and a wet system. Water treatment company deaerator, holtec international feedwater heaters, penn separator blowdown. Hod mechanical at godavari institute of engineering and technology. An ash handling system consists of some subsystems such as bottom ash ba, fly ash espair heater, ash water, and ash disposal systems. This system offers a robust and simple solution that does not require a high level of operator or maintenance skill. When the bottom ash handling system deploys jet pumps, hp pumps operate sequentially and in onoff mode, supplying to the jet pumps. 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. In a forced draught system, a blower is installed near the base of the boiler and air is forced to pass through the furnace, flues, economizer, airpreheater and to the stack.
A simple cycle gas turbine achieves energy conversion efficiencies from 20 to 35%. Bottom ash handling system like jet pumping system. Doosan has many experience in various countries, and has maintained successful track records for more than 3 decades. Construction and maintenance of belt conveyors for coal. The ash from the furnace is transported to ash handling plant and finally to the ash storage. Party must have executed annual maintenance contract for the mechanical equipments of ash handling plant and hcsd system with geho pumps or. One important, but often overlooked factor of an efficient ash handling system, is its compatibility with your facility. Remember 1 7 write briefly about belt conveyors and screw conveyors.
The schenck process method of fly ash handling is clean, efficient and fully enclosed, with exceptional reliability and requiring minimum maintenance. Mechanical ash handling systems brochure metso corporation. First of all we will discuss about the dry type bottom ash disposal system. What are the requirements of a modern surface condenser. Ash from the furnace grate, falls into a system of water possessing high velocity and is carried to the sumps. S over ash removal systems installed in 21 countries outside the u. The information contained in this booklet represents a significant collection of technical information on construction, design considerations and maintenance of belt conveyors for coal and bulk material handling plants. Systems of mechanical conveyance and elevation are described, comprising ash cars, skip hoists and bucket conveyors. Fly ash packing from hopper ash handling system in power. This manual provides engineering data and criteria for designing electric power plants where the size and characteristics of the electric. Fly ash, bottom ash handling cement based products for construction industry manufacturer 1 704 246 0953 1609 airport road monroe, nc 28110 usa 44 0 1200 422525 lincoln way, clitheroe lancashire bb7 1qg uk have a question. Mechanized ash handling systems developed as the size of coal fired boilers increased beyond the sizes permitting manual handling of large quantity of ash.
System or dcs distributed control system to visualize and control the system. Metso mechanical ash handling systems 7 metso expect results open the catalog to page 1 integrated systems approach providing a competitive edge through greater capacity and efficiency metsos mechanical ash systems are safe, effective, reliable and performanceproven. In another arrangement a continuous link chain scrapes out the clinkers from under water and feeds. The design of the ash handling plant is dependent upon the method of ash disposal. Deaeration and deoxygenation practical boiler operation. Such ash can be a considerable environmental nuisance as well as being awkward to handle due to its abrasiveness and hydroscopic characteristics. The modern ash handling systems classified into fou r groups. Examples of bulk materials are minerals, ores, coal, cereals, woodchips, sand, gravel, clay, cement, ash, salt, chemicals, grain, sugar, flour and stone.
A flexicondesigned and manufactured bulk handling system is at work for a leading bottle producer in the uk flexicons dust suppression and collection systems ensure proper containment of soda ash throughout the conveyance process. Fly ash is captured and removed from the flue gases by economiser, airpreheater and electrostatic precipitator esp located at the outlet of the furnace and before the induced. Electrostatic precipitators have a very high collection efficiency upto 99%. Typically for a 2x500 mw plant based on indian coal, the amount of ash. Stoker units use mechanical means to shift and add fuel to the fire that burns on and above the grate located near the base of the boiler. Understand 1 6 explain different method of coal handling. Integrated systems approach providing a competitive edge through greater capacity and efficiency metsos mechanical ash systems are safe, effective, reliable and performanceproven. Ash conveying systems densephase pneumatic conveying. Mechanical ash handling systems brochure pdf catalogs. Risk associated with inaccurate sample results are minimized by utilized a welldesigned and constructed mechanical sampling system mss.
Mechanical draught is preferred for central power stations. Fly ash can partly replace cement for making concrete. 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. For more articles on mechanical maintenance, visit. Coal handling system coal handling plant in thermal. Ash handling systems hydraulic system pneumatic system mechanical system. Bottom ash handling system like jet pumping system macawber. Vam system mechanical cranes hydra material handling lifting equipment. Pneumatic conveying systems are used to handle dry fly ash. Certain applications which specially require mechanical system, like in case of cfbc afbc type boilers for handling of bed ash collected at furnace bed, macawber beekay offers drag chain conveyor system, followed by pressure pneumatic conveying system. In electrical systems and equipment third edition, 1992.
For purposes of this report, the modifications to the ash handling system s currently. Ash handling pneumatic conveying handling system from schenck. The equipment should be corrosion and wear resistant. Consultation with an experienced material handling systems engineer is recommended when considering a fly ash conveying solution. Ash handling systems hydraulic system pneumatic system mechanical system 7. Find details of companies offering ash handling systems at best price. In a conventional water impounded hopper wih system, the clinker lumps get crushed to small sizes by clinker grinders mounted under water and fall down into a trough from where a water ejector takes them out to a sump. 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. Certain applications which specially require mechanical system, like in case of cfbc afbc type boilers for handling of bed ash collected at furnace bed, macawber beekay offers drag chain conveyor system, followed by pressure pneumatic conveying system as per the clients specific requirement. In addition to ash, the new pjffs will collect powdered activated carbon pac and sorbent limetrona.
Such a system, well operated and monitored, will consistently provide accurate quality data. Allenshermanhoff advances its technology development in dilutephase transport systems, pressure densephase transport systems and mechanical. Metso mechanical ash handling systems 7 metso expect results. Ash handling pneumatic conveying handling system from. Bottom and slag may be used as filling material for road construction. Plant coal \u0026 ash handling system mechanical ash. 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. With options varying from fly ash to bottom ash conveyors, and pneumatic versus mechanical ash handling systems, our experts are ready to.
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