A self-cleaning flue gas dust removal device and method

Abstract

Self-cleaning flue gas dust removal apparatus and method. A multi-hole impeller structure is used in a chamber of the dust removal apparatus, so that adsorption and separation of pollutant particles in flue gas are carried out independently, and further dust removal efficiency is greatly increased; meanwhile, a dust removal impeller is made from heat-insulating materials, wherein the end of the impeller is tightly connected to a shell body, so that direct contact between the flue gas and a cleaning fluid is avoided since the flue gas and the cleaning fluid flow in opposite directions for promoting the clockwise rotation of the dust removal impeller, thereby avoiding loss of residual heat in the flue gas during dust removal and avoiding that the dust removal obstructs flowing of the flue gas, so that power consumption during the dust removal process is reduced more. During the clockwise rotation of the dust removal impeller, the flowing of the flue gas and the cleaning fluid also has certain promoting effect, so that the power consumption during rotation of the impeller is reduced. The apparatus is high in dust removal efficiency, is low in manufacturing and operation cost and is wide in applicable temperature range.

Description

technical field [0001] The invention belongs to the technical field of flue gas treatment, and in particular relates to a self-cleaning flue gas dust removal 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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