Ash Removal

Ash Removal

 

removal from the boiler area of ash and slag accumulated in ash and slag bunkers of steam boilers when solid fuel (coal, peat, shales) is burned. At electric power stations, removal of ash with water is most often used; less frequent is pneumatic removal. Mechanical ash removal using scraper equipment, skip hoists, and scraper and apron conveyors is employed extensively in industrial boilers burning fuel in grate-fired furnaces. These devices carry ash and slag away from the boiler room to a collecting bunker, from which they are removed by railroad cars or dump trucks. With small boilers giving under 200 kg per hr of ash and slag, use is made of small narrow-gauge cars with dumping bodies, monorail suspension transport, and gravity-discharge containers. To avoid dust, the slag and ash are wetted with water before removal from the bunkers. Up to 80 tons per hour of ash and slag are removed from modern boiler plants.

References in periodicals archive ?
Electronic auction: execution of works on the repair of 2 augers of ash removal of the layer of the ash unloading machine of layer no.
By using properly designed de-sulphurizers and ash removal units, Thar coal can produce cheap electricity while meeting the most stringent international environmental standards.
Furthermore, EnergyLogic's products always give a simple and maintainable cleanup because of the ash removal port.
Furthermore, EnergyLogics products always give a simple and maintainable cleanup because of the ash removal port.
The conceptual diagram of the hydraulic ash removal system is shown in Figure 1 [11].
The order newly placed with MHIEC calls for replacement or refurbishment of the superannuated facility's core equipment, used primarily for receiving waste, feeding and incineration, combustion gas cooling, flue gas treatment, ventilation, ash removal and water supply, plus electrical and instrumentation systems.
The challenge was to decrease or eliminate the slagging at the superheater pendant tubes and the blockage at the bottom ash removal area to enable an increase in load from 230 MW to 260 MW.
After extensive testing, John Deere's DPF can go up to 15,000 hours before ash removal.
Duke has already placed four of the sites on a priority list for likely excavation and closure, with ash removal to dry, lined landfills or for reuse as construction fill.
Results to date show the combination of insecticide injections, selective ash removal and trap trees is slowing the growth of the EAB population in the two areas.
Large, reusable ceramic boats make the sample handling process easy to manage, and allow for ash removal after every analysis.
Ash pans are a common optional feature, but many stove shoppers demand an ash pan on the assumption that it will make ash removal easier and neater.