We are Manufacturer, Supplier, Exporter of Ash Coolers, Bed Ash Coolers, Fluidized Bed Ash Coolers from Pimpri Chinchwad PCMC near Pune, Maharashtra, India.
The bottom ash of circulating fluidized bed (CFB) boilers contains large amounts of physical heat. When low quality coals are used in these types of boilers, the ash content is normally more than 40 % and the physical heat loss is approximately 3 % if the bottom ash is discharged without cooling. Due to high heat transfer rate, high carbon utilizing efficiency, fuel flexibilities and other advantages, numerous circulating fluidized bed (CFB) boilers have grown up in India and across the world in the last decade. While the CFB incinerates the low-calorie fuel, the ash content is normally more than 40 % and the physical heat loss is approximately 3 %, if the bottom ash is discharged without cooling.
In addition, the red-hot bottom ash is bad for mechanical handling and transportation, as the upper limit temperature of the ash handling machinery is 200 °C. Beyond 200 °C, there is a cost implication of the equipment which handles these ash increases significantly. Discharging ash at higher temperature means significant amount of heat is wasted, which results in poor efficiency of equipment. Therefore, a bottom ash cooler (BAC) is often used to treat the high temperature bottom ash to reclaim heat, and to have the ash easily handled and transported. In the fluidized bed ash cooler, the ash is cooled and stripped of coal fines, which is later reinjected into furnace to improve efficiency. The heavier agglomerate particles are cooled with air and water, which are later removed. Bed ash is removed with rotary valve from strip cooler. The fluidized bed ash cooler is fluidized with fluidizing air.
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