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The pressure stabilization method of the bag filter

A technology of bag dust collector and voltage stabilization, which is applied to chemical instruments and methods, separation methods, and separation of dispersed particles, etc. It can solve the problems of negative pressure fluctuations in the front-end process, achieve good production quality and reduce pressure fluctuations.

Active Publication Date: 2021-11-19
HAWK SHANGHAI ENVIRONMENTAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This contradiction cannot be solved only by the static pressure box
Therefore, it is necessary to solve the problem of large fluctuations in the negative pressure of the front-end process during the pulse cleaning of the bag filter

Method used

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  • The pressure stabilization method of the bag filter
  • The pressure stabilization method of the bag filter
  • The pressure stabilization method of the bag filter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] The method for stabilizing the pressure of the bag filter in this embodiment is to add gas to the bag filter or the main pipeline connected to the front end of the bag filter before each pulse cleaning starts, and the process of adding gas lasts for a period of time. The molar amount V of the supplementary gas 1 and the gas molar amount V of this pulse cleaning 2 between V 1 = 95%V 2 ~105%V 2 .

[0052] The pressure P of the supplementary gas 0 The pressure P in the main pipeline connected to the bag filter or the bag filter and the front end 1 Meet 0.95P 1 0 1 , the pressure P of the supplementary gas 0 1.02P can be selected 1 , 1.03P 1 , 1.04P 1 ,P 1 , 0.99P 1 , 0.98P 1 or 0.96P 1 . The supplementary gas output from a higher pressure gas source can be adjusted to meet the pressure requirements, thus reducing the pressure fluctuation at the front end.

[0053] The opening time of the pulse cleaning is t 1 , the pulse cleaning duration is Δt 1 , then t...

Embodiment 2

[0058] Such as Figure 4 As shown, the pressure stabilizing device of the bag filter in this embodiment includes: a gas source, which is used to provide supplementary gas; an adjustment mechanism, the adjustment mechanism is respectively set in communication with the gas source and the target position, and the gas source, the adjustment mechanism and the target position Form a communicable gas path. The target location is the bag filter or the main pipe 6 where the bag filter is connected to the front end. In this embodiment, the target location is the main pipeline 6 connected to the front end of the bag filter.

[0059] This embodiment also includes a general controller 7, which controls the opening and closing of the regulating mechanism, and the general controller 7 monitors the pressure fluctuation of the main pipeline 6 connected to the front end of the bag filter. In this embodiment, the general controller 7 uses PLC. The gas source described in this embodiment is th...

Embodiment 3

[0074] Such as Figure 11 As shown, the pressure stabilizing device of the bag filter in this embodiment includes: a gas source, which is used to provide supplementary gas; an adjustment mechanism, the adjustment mechanism is respectively set in communication with the gas source and the target position, and the gas source, the adjustment mechanism and the target position Form a communicable gas path. The target location is the bag filter or the main pipe 6 where the bag filter is connected to the front end. In this embodiment, the target location is the main pipeline 6 connected to the front end of the bag filter. The gas source in this embodiment is an independent gas source 20 independent of the gas bag 1 . This embodiment also includes a general controller 7, which controls the opening and closing of the regulating mechanism, and the general controller 7 monitors the pressure fluctuation of the main pipeline 6 connected to the front end of the bag filter. In this embodim...

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Abstract

The invention discloses a method for stabilizing the pressure of a bag filter. Before each pulse cleaning, gas is supplied to the bag filter or a main pipeline connected to the front end of the bag filter. The gas supply process lasts for a period of time. The present invention keeps the gas volume in the bag filter and the main pipeline stable before the pulse cleaning for a period of time and during the pulse cleaning, so as to avoid the instantaneous increase in the bag filter and the main pipeline during the pulse cleaning. The original gas caused by the cleaning gas is instantly compressed, so that the pressure fluctuation on the front end caused by the instantaneous increase of the gas volume can be greatly reduced. The invention can make the pressure fluctuation in the bag dust collector meet the requirements, meet the process negative pressure fluctuation range required by precision production such as vapor deposition, and have a good effect on improving the production quality of high value-added products such as lasers and optical fiber preforms. .

Description

technical field [0001] The invention relates to a voltage stabilizing method for a bag filter. Background technique [0002] In fine chemical production such as quartz and optical fiber preform vapor deposition, it is necessary to use bag filter for waste gas treatment. Fine chemical production such as quartz and optical fiber preform vapor deposition produces dust-containing waste gas, which needs to be sucked by negative pressure to discharge the dust-containing waste gas to the bag filter at the end for treatment, while fine chemical production such as quartz and optical fiber preform vapor deposition requires The negative pressure environment requires extremely low negative pressure fluctuations. Such as figure 1 As shown, after the bag filter has been running for a period of time, the dust on the outer surface of the bag is continuously enriched. At this time, the bag filter is required for pulse cleaning. However, during pulse cleaning, it will cause large fluctuati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D46/04B01D46/42
CPCB01D46/04B01D46/42
Inventor 吴涛
Owner HAWK SHANGHAI ENVIRONMENTAL TECH
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