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Pressure stabilizing method of bag-type dust collector

A bag filter and voltage stabilization technology, applied in chemical instruments and methods, separation methods, dispersed particle separation, etc., can solve problems such as negative pressure fluctuations in the front-end process, and achieve good production quality and reduce pressure fluctuations.

Active Publication Date: 2020-10-16
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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  • Pressure stabilizing method of bag-type dust collector
  • Pressure stabilizing method of bag-type dust collector
  • Pressure stabilizing method of bag-type dust collector

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 pressure stabilizing method of a bag-type dust collector, which comprises the following steps of: supplementing gas to the bag-type dust collector or a main pipeline connected with the front end of the bag-type dust collector before each pulse ash removal, and keeping the gas supplementing process for a period of time. According to the invention, supplementing gas is introduced; the gas quantity in the bag-type dust collector and the main pipeline is kept stable before pulse ash removal for a period of time and during pulse ash removal; thus, the situation that duringpulse ash removal, original gas is compressed instantaneously due to the fact that ash removal gas is increased instantaneously in the bag-type dust remover and the main pipeline is avoided, and pressure fluctuation, caused by instantaneous increase of the gas volume, of the front end can be greatly reduced. According to the invention, the pressure fluctuation in the bag-type dust collector can meet the requirements, the process negative pressure fluctuation range required by precision production such as vapor deposition is met, and a good effect is generated for improving the production quality of high-added-value 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 Applications(China)
IPC IPC(8): B01D46/04B01D46/42
CPCB01D46/04B01D46/42
Inventor 吴涛
Owner HAWK SHANGHAI ENVIRONMENTAL TECH
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