Cylinder bag deduster blowback ash removal control apparatus and method thereof

Abstract

The invention discloses a cylinder bag deduster blowback ash removal control apparatus and a method thereof. The apparatus comprises a control system, a dedusting box body, cylinder blowback mechanisms arranged in the dedusting box body, and control units; and the quantity of the control units is 2 or more, each of the control units contains one or more cylinder blowback mechanisms in the dedusting box body, and the cylinder blowback mechanism in the control units are connected with the control system. The method is characterized in that the cylinder blowback mechanisms are divided into above two control units, the control units start one by one according to an order assigned by the control system, and the order is not the tandem arrangement order of the control units, but a selective saltatory order. The control unit close to the air inlet end of the dedusting box body can be controlled by the system to start several times within an ash removal cycle period, so too early failure of a filter bag close to the air inlet end due to adherence of a large amount of dusts is avoided, the maximum effective filtering area is guaranteed, the dedusting efficiency is improved, and the equipment energy consumption is reduced.

Description

technical field [0001] The invention relates to flue gas purification equipment for asphalt mixing stations, power plants, etc., in particular to a control device and method for backflushing and dust removal of a cylinder bag type dust collector. Background technique [0002] In the flue gas purification system of asphalt mixing plants, power plants, etc., bag filter is usually used. The dust on the bag is shaken off and collected into the dust collecting hopper. Cylinder bag filter is a kind of bag filter that is widely used at present. It controls the opening of the back blowing air inlet through the cylinder, and relies on the pressure difference between the dust box and the outside to introduce the air into the filter chamber for back blowing. [0003] The current back blowing and dust cleaning method is relatively simple, that is, all the cylinder back blowing mechanisms of the dust collector are controlled by a control system. one. One round of dust cleaning is a cy...

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Problems solved by technology

[0004] Practice has proved that the dust carried by the dusty airflow is not uniformly distributed in the bag filter, and the dust content at the air inlet of the dust collector is relatively high, and most of the dust is absorbed by the filter bag near the air inlet. The lower the dust content, the more frequent cleaning of the filter bag at the air inlet is required

The current cleaning method is that the cleaning cycle of all filter bags is the same, which causes the dust collected by the filter bag at the air inlet end to reach a saturated state before a cleaning cycle is completed, so that it is in a working state. The number of filter bags will be reduced, the effective filter area will be reduced, and the dust removal efficiency will be reduced.

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