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Method for modulating smelting flue gas based on electric dust removal device and application

A technology for smelting flue gas and electrostatic precipitator, which is applied in electrostatic separation and other directions to achieve the effect of improving dust removal efficiency, good application prospects and reducing the dust content at the outlet

Pending Publication Date: 2022-03-01
YUNNAN COPPER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, there is no similar method or device in the prior art, which can control the specific resistance of the dust within a reasonable range, thereby improving the dust collection efficiency of the electrostatic precipitator and reducing the dust content at the outlet of the dust collector

Method used

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  • Method for modulating smelting flue gas based on electric dust removal device and application
  • Method for modulating smelting flue gas based on electric dust removal device and application
  • Method for modulating smelting flue gas based on electric dust removal device and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] The smelting flue gas of this embodiment comes from a certain acid smelting plant, and its main properties are as shown in Table 1;

[0053] Table 1 Smoke properties

[0054]

[0055] In this embodiment, the method for modulating smelting flue gas based on the electrostatic precipitator, the specific steps are as follows:

[0056] (1) Open a small hole with a diameter of 160mm on the flue gas pipe with a diameter of 2700mm at the front end of the electrostatic precipitator;

[0057] (2) Lead a steam pipeline with a diameter of 45mm from the small hole opened in the flue gas pipe, and introduce the steam into the flue gas pipe;

[0058] (3) The steam introduced into the flue gas pipeline converges with the smelting flue gas at a temperature of 250°C in the pipeline to form a mixed flue gas, of which the flue gas volume is 13000Nm 3 , the moisture content of the mixed flue gas is 3.6%;

[0059] (4) After that, the mixed flue gas passes through the cathode plate of t...

Embodiment 2

[0063] The smelting flue gas of this embodiment comes from a certain acid smelting plant, and its main properties are as shown in Table 2;

[0064] Table 2 Smoke properties

[0065]

[0066] In this embodiment, the method for modulating smelting flue gas based on the electrostatic precipitator, the specific steps are as follows:

[0067] (1) Open a small hole with a diameter of 140mm on the flue gas pipe with a diameter of 2900mm at the front end of the electrostatic precipitator;

[0068] (2) Lead a steam pipeline with a diameter of 55mm from the small hole opened in the flue gas pipe, and introduce the steam into the flue gas pipe;

[0069] (3) The steam introduced into the flue gas pipeline converges with the smelting flue gas at a temperature of 390°C in the pipeline to form a mixed flue gas, of which the flue gas volume is 11000Nm 3 , the moisture content of the mixed flue gas is 3.4%;

[0070] (4) After that, the mixed flue gas passes through the cathode plate of t...

Embodiment 3

[0074] The smelting flue gas of this embodiment comes from a certain acid smelting plant, and its main properties are as shown in Table 3;

[0075] Table 3 Smoke properties

[0076]

[0077] In this embodiment, the method for modulating smelting flue gas based on the electrostatic precipitator, the specific steps are as follows:

[0078] (1) Open a small hole with a diameter of 150mm on the flue gas pipe with a diameter of 2800mm at the front end of the electrostatic precipitator;

[0079] (2) Lead a steam pipeline with a diameter of 50mm from the small hole opened in the flue gas pipe, and introduce the steam into the flue gas pipe;

[0080] (3) The steam introduced into the flue gas pipeline converges with the smelting flue gas at a temperature of 310°C in the pipeline to form a mixed flue gas, of which the flue gas volume is 12000Nm 3 , the moisture content of the mixed flue gas is 3.5%;

[0081] (4) After that, the mixed flue gas passes through the cathode plate of t...

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Abstract

The invention discloses a method for modulating smelting flue gas based on an electric dust removal device and application. A small hole is formed in a flue gas pipeline at the front end of an electric dust removal device, then a steam pipeline is led out from the small hole, and steam is led into the flue gas pipeline; the introduced steam is converged with the smelting flue gas in the pipeline and then passes through a cathode plate part of the electric dust remover; and the neutralized smoke dust falls into an ash hopper below the electric dust remover, and the residual pure smoke gas is directly sent to an acid making system for acid making. The holes are formed in the bottom end of the flue gas pipeline, steam is introduced, flue gas in the pipeline can be modulated, the moisture content of the flue gas can be improved, then the specific resistance of smoke dust in the flue gas is controlled to be within a proper range, and the smoke dust charging capacity is improved. The specific resistance is improved, the dust collection efficiency of electric dust collection is improved, the dust content of an outlet of the dust collector is reduced, and finally the purpose of improving the dust collection efficiency of the electric dust collection device is achieved. And the method is simple to operate and high in production combination degree, and has a very good application prospect.

Description

technical field [0001] The invention relates to the field of environmental protection technology, in particular to a method and application for modulating smelting flue gas based on an electrostatic precipitator. Background technique [0002] At present, electrostatic precipitator is widely used in flue gas purification, but the specific resistance of general electric precipitator is high, and the dust collection efficiency is generally about 85%, which cannot reach a very ideal state. 0.65g / Nm 3 . Among them, the specific resistance has the greatest influence on electrostatic precipitator. The specific resistance of smoke and dust is an index to measure the conductivity of flue gas. When the specific resistance of smoke and dust is too low, the charge of smoke and dust is neutral, and it is easy to separate from the sedimentation to form secondary dust; when the specific resistance of smoke and dust is too high, it will be difficult to release the charge. Always keep the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03C3/34
CPCB03C3/34
Inventor 王晓武鲁伟周剑宗王辉林卫强道云宝许璐曦徐晖魏宇宁
Owner YUNNAN COPPER CO LTD