Front-bag and rear-electricity combined flow distribution deduster

Abstract

The invention relates to a front-bag and rear-electricity combined flow distribution deduster, which comprises a dedusting box body, an air inlet pipe and an air outlet pipe which are communicated with the dedusting box body and an ash bucket connected to the lower part of the dedusting box body, wherein the dedusting box body comprises a bag dedusting box body and an electric dedusting box body; the air inlet pipe comprises a bag dedusting air inlet pipe communicated with the bag dedusting box body and an electric dedusting air inlet pipe which is communicated with the electric dedusting box body; the bag dedusting air inlet pipe is provided with a bag dedusting air inlet valve, and the electric dedusting air inlet pipe is provided with an electric dedusting air inlet valve; and the air outlet pipe is communicated with the bag dedusting box body and the electric dedusting box body. The front-bag and rear-electricity combined flow distribution duster integrates the advantages of an electric deduster and a bag type deduster, the electric deduster and the electric deduster run in a partition mode and are switched mutually, and the characteristics of the electric deduster and the bag type deduster are exerted to meet the requirements of working conditions that a boiler is frequently halted and started; and by the front-bag and rear-electricity combined flow distribution deduster, the damage of pipe explosion of the boiler to a filter bag is avoided effectively, the safety of the filter bag is ensured, bypass smoke gas can be purified effectively during the starting of fuel oil in the boiler, and the requirement of environmental protection is met.

Description

technical field [0001] The invention relates to a combined shunt dust collector with front bag and rear electricity. Background technique [0002] The dust removal mechanism of the electrostatic precipitator is based on the fact that the dust is charged in a high-voltage electric field, and then is trapped on the dust collecting plate to achieve the purpose of dust and gas separation. Fine dust is difficult to be collected by electrostatic precipitators due to its small particle size, light weight, low charge capacity, and "secondary dust" caused by vibration cleaning. It can be said that the dust removal mechanism of the electrostatic precipitator itself limits the further improvement of its dust removal efficiency. The conventional electrostatic precipitator should reach 30mg / Nm 3 This new emission standard is very difficult or uneconomical. [0003] The bag filter achieves the purpose of dust removal through the mechanical filtration of the filter material and the du...

AI Technical Summary

Problems solved by technology

In order to avoid a sudden rise in the temperature of the flue gas in the dust removal system, or when the four tubes of the boiler gas saving, reheater, superheater, and water wall leak or burst, especially when the boiler is frequently shut down, the The soot generated during ignition and start-up will have a negative impact on the use of the filter bag. Therefore, a dust collector that can meet the requirements of the bag filter and has an electrostatic precipitator that can adapt to high temperature, high humidity, and oily smoke is used for It is very urgent technically and economically to solve the problems of the above-mentioned known dust collector structure.

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