Self-declining type circulating ash cooling device and treatment method for circulating ash

Abstract

This invention relates to self-lowering ash cooling device and recycle ash process method, which comprises the following steps: materials back device and ash tube on bottom; setting expansion degree at ash tube with entrance through dynamic valve and ash tube; the cooling exit and rotation control valve are connected; when in use firstly opening handle valve from back materials through ash tube, handle valve into cooling device under 150 degrees through cooling chamber and then entering high voltage gas through gas transmission tube into ash discharge database.

Description

technical field [0001] The invention relates to a circulating ash cooling device and a circulating ash processing method of a circulating fluidized bed, in particular to a self-falling circulating ash cooling device and a circulating ash processing method. Background technique [0002] At present, the circulating fluidized bed boiler feeder at home and abroad is only provided with an ash discharge pipe at the bottom of the feeder. This treatment method will produce excessive circulating ash for CFB boilers burning high-ash low-quality coal, which will cause a series of problems: the temperature of the furnace will drop, especially the temperature in the dense phase zone will drop even more, even below 800 ° C, The proportion of incomplete combustion of the bottom slag increases; because the amount of wear is proportional to the ash concentration, the wear of the water wall of the furnace is intensified; the ash concentration at the tail increases, and the heating surface at ...

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Problems solved by technology

This treatment method will produce excessive circulating ash for CFB boilers burning high-ash low-quality coal, which will cause a series of problems: the temperature of the furnace will drop, especially the temperature in the dense phase zone will drop even more, even below 800 ° C, The proportion of incomplete combustion of the bottom slag increases; because the amount of wear is proportional to the ash concentration, the wear of the water wall of the furnace is intensified; the ash concentration at the tail increases, and the heating surface at the tail wears seriously; the concentration of the inlet of the dust collector increases, and the concentration of smoke and dust seriously exceeds the standard Increased wear and tear of the induced draft fan; increased power consumption of the unit, especially the increase in the inlet concentration of the dust collector, and the serious excessive dust concentration of the exhaust smoke has become a major environmental protection problem in the operation of CFB boilers

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