Protection device and protection method for filter bag of bag-type dust remover

Abstract

The invention discloses a protection device and a protection method for a filter bag of a bag-type dust remover. The protection device comprises an air evacuating and gas filling unit and a protective gas sealing unit, wherein the air evacuating and gas filling unit comprises a first air and gas filling evacuating assembly and a second air and gas filling evacuating assembly, the first air evacuating and gas filling assembly is used for completely evacuating normal pressure air in the filter bag and a space above a ceiling in a box body of the bag-type dust remover and filling pressured protective gas into the filter bag, the second air evacuating and gas filling assembly is used for completely evacuating the normal pressure air in the space below the flower panel in the box body of the bag-type dust remover and filling the pressured protective gas out of the filter bag; and the protective gas sealing unit comprises offline valve assemblies used for sealing the protective gas into the box body of the bag-type dust remover, air inlet regulating valve assemblies and gate valve assemblies. According to the protection device and protection method for the bag-type dust remover, the filter bag is isolated from the air, the protective gas is adopted for protection, and the filter bag is free from oxidation corrosion, so that service life of the filter bag is prolonged and operating cost of the bag-type dust remover is reduced.

Description

technical field [0001] The invention relates to the technical field of coal-fired boilers, in particular to a filter bag protection device and a protection method for a bag filter. Background technique [0002] As the national environmental protection requirements are getting higher and higher, the emission requirements of flue gas and dust concentration are also becoming more and more stringent, which makes the proportion of bag filter used for dust removal of coal-fired boiler tail gas also further increase. At present, almost all new boiler dust removal projects use bag filter, while the original coal-fired boiler electric dust collector, water mill dust collector, etc. are gradually changing to bag filter. [0003] In the complete bag filter equipment, the filter bag is the core working part of the bag filter, and its value is also very expensive, close to one-fifth of the total value of the entire set of dust removal equipment, and it must be replaced periodically after...

AI Technical Summary

Problems solved by technology

The second situation is the reality faced by most bag filter manufacturers, which deeply troubles the manufacturers of dust collectors.

Under the above conditions of high temperature and high oxygen content, the oxidation and corrosion of the PPS filter bag is destructive, and its service life is greatly shortened. In this way, the filter bag needs to be replaced, which in turn increases the operation of the bag filter manufacturer. cost

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