A bag filter dust removal device

Abstract

A dust removal device for a bag type dust collector, which is provided with a moving blowing pipe device, and is used for pulse ejection of blowback gas for dust removal, and the blowing pipe (6) with a nozzle (9) moves back and forth in a straight line to blow the filter at different positions. The bag (22), the air pipe (5) between the air bag (2) and the blowing pipe (6) is non-displaceable near the end of the air bag pulse valve (1), and the end near the blowing pipe (6) is with the blowing pipe (6). blowpipe displacement.

Description

technical field [0001] The invention relates to a dust cleaning device for a bag type dust collector, which belongs to the field of environmental protection dust control. Background technique [0002] A complete main body of the bag filter, taking the mainstream vertical external filter dust collector as an example, there are dust hoppers, filter chambers, air inlet passages connected to it on one side of the filter chamber and possible valves from bottom to top , the clean air chamber and the air outlet channel connected with the clean air chamber and the possible valves. The ash hopper is used to store the dust and regularly discharge the ash through the ash discharge valve on the ash hopper. There are a large number of cylindrical filter bags made of filter materials in the filter chamber, and the filter bags are hung on the flower board. The flower plate is also called a porous plate, which refers to a steel plate with holes for installing filter bags, which isolates t...

AI Technical Summary

Problems solved by technology

[0004] The disadvantage of line injection is that there are many injection pipes and pulse valves, it is inconvenient to replace the filter bag, and the space arrangement is not enough to use low-pressure and high-flow injection pipes

[0005] Disadvantages of rotary blowing: On the one hand, because the nozzles at different radius positions on the rotary arm have different rotation strokes at the same time, the distance between the centers of the filter bags arranged on different radii on the perimeter is the same

However, due to the short pulse injection time, there is always negative pressure in the box. After the pulse injection, the dust that has just been blown off is easily affected by the negative pressure and returns to the bag, forming the so-called secondary bag in the industry. Secondary dusting, secondary dusting will reduce the effect of blowing dust cleaning, and cannot achieve high-efficiency bag body cleaning

At present, the whole box off-line method is often used in the industry to solve the secondary dust problem, but this method will add an extra box, which not only increases the floor area of ​​the dust collector, but also increases the investment cost.

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