Self-circulation flue gas dust collecting device and method

Abstract

The invention relates to a self-circulation flue gas dust collecting device and a method. A porous impeller structure is applied to a dust collecting device cavity, a cleaning fluid acts with potential energy to flow from top to bottom so as to drive a dust collecting impeller to rotate clockwise, no additional action is needed, and a self-circulation function of the device is realized; an impeller rotation process also has a certain promotion function on feeding flue gas; with the novel porous impeller structure, pollutant particles in the flue gas can be adsorbed and washed separately, so that the dust collecting efficiency is greatly improved; meanwhile, the dust collecting impeller is made of heat insulation materials, the tail end of the impeller is tightly connected with the shell, and the contraflow of the flue gas and the cleaning fluid is utilized for driving the dust collecting impeller to rotate clockwise, so that the flue gas is prevented from directing contacting the cleaning fluid, the loss of flue gas waste heat during a dust collecting process is avoided, meanwhile, the dust collecting process is prevented from obstructing the flowing of the flue gas, and the power consumption in the dust collecting process is reduced to a greater extent. The whole device has the characteristics of high dust collecting efficiency, low manufacturing and operating cost, wide application temperature range, and the like.

Description

technical field [0001] The invention belongs to the technical field of flue gas treatment, and in particular relates to a self-circulating flue gas dedusting device and method. Background technique [0002] With the rapid development of my country's industry, there are more and more boilers and metallurgical steelmaking electric furnaces that use raw coal as fuel, and the pollutants emitted by these furnaces have brought great harm to the atmospheric environment, making my country's environmental governance face a lot. Therefore, the recovery and treatment technology of particulate matter in flue gas is becoming more and more important. The composition of the flue gas is very complex, and the dust often contains fuel ash, coal particles, oil droplets, and pyrolysis products. [0003] The dust removal device can separate the dust from the flue gas, so it has been more and more used in the flue gas dust removal. According to the collection mechanism, dust removal methods can ...

AI Technical Summary

Problems solved by technology

Among them, mechanical dust removal uses mechanical force to remove dust from the air flow, which is low in cost but low in dust removal efficiency; electric dust removal uses electrostatic force to separate dust from air flow, and has high dust removal efficiency but high cost; filter dust removes dust from gas through filter materials. , not suitable for high-temperature flue gas; the dust and gas are separated by the collision of dust and liquid droplets or liquid film through washing and dust removal, and the operating cost is high

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