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A multi-pressure differential control method for a bag filter

A bag-type dust collector and control method technology, applied in chemical instruments and methods, separation methods, dispersed particle separation and other directions, can solve the problems of filter bag damage, increase in height, the dust collector does not achieve the effect of dust removal and dust removal, and reduce dust removal. Cost, prolong service life, good effect of dust removal

Active Publication Date: 2017-11-28
上海袋式除尘配件有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] When the existing bag filter is used in many sites, due to the uncertainty of the working conditions, such as a sharp increase in the amount of dust in a certain period of time, it is impossible to reduce the pressure difference on both sides of the filter bag under the set pressure difference cleaning time parameter conditions Therefore, even if the dust collector is working all the time, the resistance on both sides of the filter bag does not decrease, but increases even more, so that the entire dust collector does not achieve the desired effect of dust removal and dust removal. At the same time, the filter bag is in high resistance on both sides for a long time state can also cause damage to the filter bag

Method used

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  • A multi-pressure differential control method for a bag filter
  • A multi-pressure differential control method for a bag filter
  • A multi-pressure differential control method for a bag filter

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Experimental program
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Embodiment 1

[0029] Such as figure 1 As shown, the bag filter includes a box body, a pulse controller 1, an air bag 2, a differential pressure transmitter, an electromagnetic pulse valve 4, an injection pipe 5 and a filter bag 6, and the differential pressure transmitter is located in the upper and lower boxes of the dust collector. At the differential pressure port 3 of the body, the pressure difference between the inside and outside of the filter bag 6 is detected. The pressure difference between the inside and outside increases with the increase of the amount of dust attached to the filter bag 6. The pulse controller 1 receives the transmission from the differential pressure transmitter. The pressure difference value is connected to the control electromagnetic pulse valve 4. The electromagnetic pulse valve 4 is set between the air bag 2 and the blowing pipe 5, and the compressed air in the air bag 2 is controlled to spray from the blowing pipe 5 to the filter bag 6 in the box. The dust ...

Embodiment 2

[0051] The structural principle of a bag-type dust collector is the same as that of Embodiment 1, and there are ten electromagnetic pulse valves 4 in total. Based on the above-mentioned multi-pressure difference control method, the following parameters can be set for the bag-type dust collector:

[0052] PL is set to 800Pa, N=5;

[0053] pH 1 Set to 1500Pa, T 11 100ms, T 12 for 300s;

[0054] pH 2 Set to 2000Pa, T 21 120ms, T 22 250s;

[0055] pH 3 Set to 3000Pa, T 31 150ms, T 32 is 200s;

[0056] pH 4 Set to 4000Pa, T 41 200ms, T 42 150s;

[0057] pH 5 Set to 5000Pa, T 51 250ms, T 52 for 100s.

[0058] The working process of the bag filter is as follows: image 3 Shown, compare embodiment one to increase to PH 4 、PH 5 Steps for judging two pressure difference upper limit values. Under normal circumstances, due to the low dust concentration, the pressure difference on both sides of the filter bag 6 increases slowly. 1 The state can normally reduce the di...

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Abstract

The invention relates to a multi-pressure differential control method for a bag filter, comprising step S1: setting N upper limit values ​​PHn of differential pressure, lower limit values ​​PL of differential pressure, and corresponding to each upper limit value PHn of differential pressure Among them, 2≤n≤N, PL<PHn<PHn+1; Step S2: Circularly wait for dust removal, and detect the pressure difference P of the upper and lower boxes of the dust collector; Step S3: When the pressure difference P is greater than or equal to When a certain pressure difference upper limit value PHn, Q electromagnetic pulse valves are controlled to carry out cycle cleaning under the corresponding working parameters until the pressure difference value P is less than or equal to the pressure difference lower limit value PL, then skip to step S2. Compared with the prior art, the present invention can adjust the working parameters of differential pressure dust removal according to the change of pressure differential resistance on site, increase the intensity of dust removal, and ensure the dust removal effect of the bag filter.

Description

technical field [0001] The invention relates to the control field of bag dust collector system, in particular to a multi-pressure difference control method of bag dust collector. Background technique [0002] The pressure difference cleaning control method of the bag filter refers to: according to the resistance on both sides of the filter bag (that is, the pressure difference value of the upper and lower boxes of the dust collector) to judge whether to clean the dust, according to the set upper limit of the pressure difference and The lower limit of the pressure difference (the upper limit of the pressure difference is greater than the lower limit of the pressure difference). After the dust passing through the filter bag increases, the pressure difference gradually rises to the upper limit of the pressure difference. When it is lower than the lower limit, it stops cleaning and enters a waiting state. [0003] When the existing bag filter is used in many sites, due to the u...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D46/04B01D46/46
Inventor 周暐朱贤斌
Owner 上海袋式除尘配件有限公司