Stage blowback dust-cleaning method and equipment of air box blowback bag type dust collector

Abstract

The invention relates to a stage blowback dust-cleaning method of an air box blowback bag type dust collector, and the air box blowback bag type dust collector, and the method includes the following steps: (1) closing an air exhaust valve of a dust collection bag chamber of the collector, and opening a reverse blow valve; (2) setting the initial wind speed of a back blower to 0.3-2 times as high as the filtering wind speed to blow back the dust collection bag in the dust collection chamber, with blowback time being 0.5-5 s; (3) increasing air quantity of the back blower to 1-5 times as large as the filtering wind speed; (4) continuing to blow back the dust collection bag, with blowback time being 2-60 s, and finishing the dust collection. The stage blowback dust-cleaning method in the invention can enhance blowback dust-cleaning effect of air box blowback bag type dust collector, ensure external surface of the dust collection bag to be thoroughly cleaned, avoid dust deposition phenomenon at bottom of the dust collection bag, and improve dust collection efficiency. In addition, the dust collector used in the stage blowback dust-cleaning method is characterized by simple structure, reasonable design, convenient use, and energy saving.

Description

technical field [0001] The invention belongs to the field of environmental protection dust removal equipment, in particular to a method for cleaning dust by staged blowback of an air box blowback bag type dust collector and the equipment thereof. Background technique [0002] The bag filter is a commonly used equipment in the field of dust removal. The inside of the box is divided into multiple bag rooms by vertical partitions, and multiple dust bags are installed in each bag room. The air box anti-blowing bag filter is a kind of bag filter, which is usually composed of an air inlet pipe, an upper box, a lower box, an exhaust pipe, an ash store and a blower blower. The upper box and the lower box Through the orifice connected installation. After the air box anti-blowing bag filter has been running for a period of time, it is necessary to clean the dust bag inside to ensure the dust removal effect. At present, the method used for dust removal is: use the reverse blower to i...

AI Technical Summary

Problems solved by technology

[0003] Although this method of dust removal is widely used, there are shortcomings in its use: the wind pressure and air volume of the reverse blower are fixed, and the resistance of the dust removal bag is different due to different lengths.

When the reverse blower blows the dust bag in reverse direction, the dust on the upper part of the dust bag will be blown off, and at the same time, part of the back blow will be shunted and discharged from the cleaned sieve holes, while the dust attached to the outer surface of the lower part of the dust bag will be blown off. The dust cannot be cleaned due to insufficient back blowing wind force and air volume, resulting in uneven dust removal on the surface of the dust removal bag, and dust accumulation at the bottom of the dust removal bag, which affects the dust removal effect and reduces the filtration efficiency of the entire dust collector. serious impact on the process

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