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Method for eliminating secondary flying dust caused by ash removal and corresponding electric precipitator device

A secondary dust raising and dust collector technology, applied in the direction of electrostatic separation, electrode cleaning, climate change adaptation, etc., can solve the problems of secondary dust raising, reduce the dust removal efficiency of electrostatic precipitator, etc., and achieve the effect of simple and reliable scheme

Inactive Publication Date: 2017-03-08
SHANDONG SHENGHUA INVESTMENT +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, when the electrostatic precipitator is cleaning dust, it will generate secondary dust, which seriously reduces the dust removal efficiency of the electrostatic precipitator.

Method used

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  • Method for eliminating secondary flying dust caused by ash removal and corresponding electric precipitator device
  • Method for eliminating secondary flying dust caused by ash removal and corresponding electric precipitator device
  • Method for eliminating secondary flying dust caused by ash removal and corresponding electric precipitator device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Example 1, such as Figure 1 ~ Figure 2 shown.

[0041] The electrostatic precipitator provided by the present invention to eliminate the secondary dust caused by dust removal includes an air inlet 1, a body 2, an air outlet 5, an ash hopper 6, etc., and several electric fields are arranged in the dust collector body 2, and each electric field is composed of The anode plate 3 and the cathode wire 4 are composed.

[0042] In this embodiment, each electric field is composed of 9 anode plates and 8 rows of cathode lines. In an electric field, each anode plate and each row of cathode lines is a cleaning area. Behind the terminal electric field 14, an airflow control device 8 is provided. In this embodiment, the airflow control valve 8 is a cut-off valve.

[0043] The cleaning area is divided by the anode plate. In the space on one side of the gas inlet of the air flow control valve 8, except for the two ends close to the body wall extending from the body wall, the rest...

Embodiment 2

[0050] Example 2, such as image 3 ~ Figure 5.

[0051] The difference between this embodiment and embodiment 1 is:

[0052] Behind the terminal electric field 14, an airflow control device 15 is provided. In this embodiment, the airflow control device 15 is a two-position three-way reversing valve.

[0053] In the space on one side of the gas inlet of the two-position three-way reversing valve 15, except that the two ends close to the body wall extend from the body wall, the rest take the extension of the cathode line arrangement direction as the starting point, and the two-position three-way reversing valve 15 As the end point, 9 square-to-circle pipelines 16 are set. In the present embodiment, the square-turned-circle duct 16 forms the air-flow isolation zone 19 of A to I.

[0054] Such as Figure 6 As shown, the outlets of the nine square-to-circle pipes 16 corresponding to A to I can be arranged in a staggered manner, which is beneficial to the installation and mainte...

Embodiment 3

[0059] Example 3, such as Figure 6 ~ Figure 7 shown.

[0060] The characteristics of this embodiment are:

[0061] At both ends of all the anode plates, flap dampers 18 are provided, and at the top of the dust collector box 2 corresponding to the position of each flap damper 18, a flap damper driving device is provided.

[0062] During work, the flap damper 18 in the area affected by the secondary dust removal is closed to form a static area, so that the secondary dust caused by dust removal is re-adsorbed on the pole plate, or settled in the ash hopper. After the impact of the secondary dust in the cleaning area is eliminated, the corresponding flap damper 18 is opened again, so that the pole plate in this area is put into work again.

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PUM

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Abstract

The invention belongs to the field of gas dust removal and environmental protection and provides an electric precipitator for eliminating secondary flying dust caused by ash removal. A plurality of ash removal areas capable of independently removing ash can be divided in electrodes of at least a tail electric field in all electric fields of the electric precipitator in sequence; and at least one airflow control device is arranged corresponding to each ash removal area, at least corresponding to each ash removal area of the tail electric field; through different combinations of operation of the airflow control devices, and only airflow not influenced by secondary flying dust caused by ash removal flows into the next working procedure or is diffused to the environment. Loop pipelines for communicating airflow flowing through the loop pipelines with airflow entering the precipitator are arranged behind the ash removal areas of the tail electric field. The loop pipelines comprise loop branch pipes and loop header pipes. Draught fans are arranged on the loop pipelines, separated airflow influenced by secondary flying dust caused by ash removal can be introduced back to be mixed with airflow entering the precipitator. The influence on the dedusting effect from secondary flying dust caused by ash removal of the electric precipitator is basically eliminated; the electric precipitator is suitable for dry type ash removal modes of various electric precipitators; and the scheme is simple and reliable, and the electric precipitator is completely compatible with an existing electric precipitation technology and suitable for transformation.

Description

technical field [0001] The invention relates to a method and a device for removing dust from dust-containing gas, and belongs to the field of environmental protection. Background technique [0002] Industrial production will produce dust-laden gas, and the dust-laden gas will be discharged to the atmosphere after a large amount of dust is removed by dust removal facilities. [0003] Fine dust removal facilities mainly include bag filter and electrostatic precipitator. Because the bag filter is not resistant to high temperature and water, the resistance is relatively large, and the filter bag material of the bag filter is glass fiber, flumes, etc., which will cause secondary pollution, so it is not suitable for many fields. Electrostatic precipitators are widely used in industrial production because of their small resistance, high dust removal efficiency, and temperature resistance. [0004] However, when the electrostatic precipitator is cleaning the dust, the problem of s...

Claims

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Application Information

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IPC IPC(8): B03C3/74B03C3/36B03C3/34
CPCB03C3/34B03C3/36B03C3/74Y02A50/2351
Inventor 刘建国贠汝平姚朝胜黄东生姚航东佃军
Owner SHANDONG SHENGHUA INVESTMENT