Coal ash screening device and method capable of avoiding raising dust

Abstract

The invention discloses a coal ash screening device and method capable of avoiding raising dust, which belongs to the technical field of coal ash processing. A supporting table is arranged on the bottom of the inner cavity of a box body; an air inducing fan is arranged on the top of the inner cavity of the box body; a charging assembly is arranged below the air inducing fan; a first sorting assembly is arranged below the charging assembly; a second sorting assembly is arranged below the first sorting assembly; the side wall of the box body is provided with a raising dust preventing assembly; and a material collecting assembly is arranged below the raising dust preventing assembly. A conventional vibration type screening structure is changed, a sorting filter ring of an inner hollow circular table shaped structure is matched with a sweeping brush capable of continuously rotating along the surface of the sorting filter ring to realize sorting operation, so that dust amount raised by materials during vibration is reduced; and through stage-by-stage sorting operation, sorting quality is improved; and moreover, amount of raised dust is smaller, and raised dust is collected through dustcollecting cloth capable of rotating in a circulating mode, so that the coal ash screening device is high in environment friendliness, and is good in using effect.

Description

technical field [0001] The invention relates to the technical field of fly ash processing, in particular to a fly ash screening device and method for avoiding ash raising. Background technique [0002] Fly ash is the tiny ash particles emitted during the combustion of fuel. Its particle size is generally between 1 and 100 μm. Belongs to hazardous waste. Also known as fly ash or soot. Fine solid particles in the flue gas ash produced by fuel combustion. Such as fine ash collected from flue gases in coal-fired power plants. Fly ash is formed when coal powder enters the furnace at 1300-1500°C, undergoes heat absorption by the hot surface under suspension combustion conditions, and then cools down. Due to the effect of surface tension, most of the fly ash is spherical, with smooth surface and small micropores. Part of them are cohered due to collision with each other in the molten state, and become honeycomb composite particles with rough surface and many corners. [0003...

AI Technical Summary

Problems solved by technology

[0003] Due to the natural fall of fly ash during processing, a large amount of dust will be raised, which will float in the air and cause pollution, and the environmental protection performance is not high; It is easy to raise a large amount of dust, and the use effect is not good. Therefore, we propose a fly ash screening device and method to avoid dust raising

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