Explosion-proof explosion-release full-automatic bag-type filtering device for pulverized bituminous coal

Abstract

The invention discloses an explosion-proof explosion-release full-automatic bag-type filtering device for pulverized bituminous coal. The device comprises a box body, wherein the middle part of the box body is provided with a filtering chamber; the upper part of the box body is provided with a purified gas chamber; the lower part of the box body is provided with an ash hopper; a filtering bag is arranged in the filtering chamber; an opening at the upper end of the filtering bag is communicated with the purified gas chamber; a purified gas duct for blowing purified gas to the opening at the upper end of the filtering bag is formed in the purified gas chamber; an air inlet is formed on the filtering chamber of the box body; an air outlet is formed on the purified gas chamber of the box body; the air inlet is connected with a flue gas duct in a filtering area; the upper parts of baffle plates on two sides of the flue gas duct are provided with flow guide plates which ensure that the upper part of the flue gas duct is communicated with the upper part of the filtering area; and a porous flow blocking plate is arranged in the flue gas duct. The device has a reasonable structure and low resistance and can directly treat high-concentration, combustible and explosive pulverized bituminous coal, the purified gas discharging effect exceeds the environment-friendly standard, easily damaged parts are long in service life and low in maintenance workload, and necessary explosion-proof explosion-release measures are provided.

Description

technical field [0001] The invention relates to an automatic bag filter device for explosion-proof and explosion-releasing bituminous coal powder. Background technique [0002] The filter and collection of bituminous coal powder in domestic bituminous coal preparation adopt bag type dust collector: [0003] 1) Bag filter [0004] After the raw bituminous coal block is ground and dried by a medium-speed mill, the dryness of the coal powder is ≤1%, and the particle size is ≤74um, accounting for 95%. Then the qualified coal powder in the mill is drawn out by the fan and filtered by the bag filter. The bituminous coal powder extracted from the mill has the characteristics of small particle size, high concentration, flammability and explosion, and high water content in the flue gas. The dust collector is not equipped with the necessary high-performance filtration measures and explosion-proof and explosion-relief functions, resulting in serious local damage to the filter bag. Sp...

AI Technical Summary

Problems solved by technology

The bituminous coal powder extracted from the mill has the characteristics of small particle size, high concentration, flammability and explosion, and high water content in the flue gas. The dust collector is not equipped with the necessary high-performance filtration measures and explosion-proof and explosion-relief functions, resulting in serious local damage to the filter bag. Spontaneous combustion accidents often occur in the body, and the resistance of the equipment is extremely high, which seriously affects continuous and safe production

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