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Method for capturing PM2.5 fine particles through water mist charged coagulation for electric precipitation

A PM2.5 and electrostatic precipitator technology, applied in the field of air pollution control, can solve the problems that electrostatic precipitator cannot capture, and it is difficult to meet the requirements of atmospheric particulate matter emission, so as to improve the difficulty of charging, promote condensation and agglomeration, and increase viscous force. Effect

Inactive Publication Date: 2015-02-04
SHIJIAZHUANG HULIN ENVIRONMENTAL PROTECTION EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, a lot of practice has proved that simply increasing the number of electric fields and changing the cleaning method is still difficult to meet the emission requirements of atmospheric particulate matter. The reason is that the fine particles below 10um (especially below PM2.5) are difficult to charge. According to the principle of electrostatic precipitator It can be seen that the electrostatic precipitator cannot capture the fine particles that are not charged.

Method used

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  • Method for capturing PM2.5 fine particles through water mist charged coagulation for electric precipitation
  • Method for capturing PM2.5 fine particles through water mist charged coagulation for electric precipitation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Example 1 as figure 1 As shown, the atomizing device 9 is composed of several dual-fluid nozzles 3, dual-fluid nozzle water supply pipelines 4, and dual-fluid nozzle air supply pipelines 5, and is installed between the air inlet air distribution plate 2 and the primary electric field 6 in the electrostatic precipitator 1. During this period, the liquid containing electrolyte and surfactant from the two-fluid nozzle water supply pipeline 4 and the air from the two-fluid nozzle air supply pipeline 5 form a water mist liquid and spray it into the primary electric field 6 under the action of the two-fluid nozzle 3. In the primary electric field 6, the corona is charged, and the charged liquid droplets collide with the particles entrained in the flue gas. On the one hand, the water mist can condition the flue gas and improve the working condition of the electrostatic precipitator. On the other hand, it contains electrolyte and The charged liquid of the surfactant collides wi...

Embodiment 2

[0018] Example 2 as figure 2 As shown, the atomizing device 9 is composed of a dual-fluid nozzle 3, a dual-fluid nozzle water supply pipeline 4, and a dual-fluid nozzle air supply pipeline 5, and is installed between the final electric field 7 and the penultimate electric field in the electrostatic precipitator 1, The liquid containing electrolyte and surfactant from the two-fluid nozzle water supply pipeline 4 and the air from the two-fluid nozzle air supply pipeline 5 form a water mist liquid sprayed into the primary electric field 6 under the action of the two-fluid nozzle 3, and in the primary electric field 6. Corona charging, the charged liquid droplets collide with the particles entrained in the flue gas. On the one hand, the water mist can condition the flue gas and improve the working condition of the electrostatic precipitator. On the other hand, it contains electrolytes and surface activation The charged liquid of the agent collides with the particles in the flue g...

Embodiment 3

[0019] The difference between Embodiment 3 and Embodiment 2 is that the atomizing device 9 is installed between the second-to-last electric field and the third-to-last electric field. Others are the same and will not be repeated here.

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Abstract

The invention relates to a method for capturing PM2.5 fine particles through water mist charged coagulation for electric precipitation. The method comprises an electrostatic precipitation part and a liquid atomization part. Atomized liquid droplets are subjected to corona charge in an electric field; the droplets are charged; the charged droplets collide with the fine particles; the fine particles are agglomerated through coagulation; and charges are transferred on the fine particles, thereby improving charging performances of the particles and effectively increasing removal efficiency of the fine particles. The invention also provides a device for capturing the PM2.5 fine particles through water mist charged coagulation for electric precipitation. The device comprises an electrostatic precipitation part and a double-fluid jet atomization part. The double-fluid jet atomization part comprises a gas supply pipeline, a water supply pipeline and a plurality of nozzles. The device is small in occupied area, simple in structure and steady to operate; and the removal efficiency of the fine particles can reach over 95%.

Description

technical field [0001] The invention belongs to the field of air pollution control, and in particular relates to a method for electrostatically collecting water mist and collecting PM2.5 fine particles. Background technique [0002] my country is the country with the largest number of industrial kilns in the world. According to incomplete statistics, my country's annual smoke and dust emissions exceed 10 million tons, of which PM2.5 fine particles are about 4 million tons. A large amount of smoke and dust emissions have caused serious pollution. In order to control the emission of smoke and dust, industrial kilns are equipped with dust removal equipment. At present, about 90% of the flue gas purification equipment of industrial kilns in my country use electrostatic precipitators with high cost performance. The removal efficiency of particulate matter with a diameter above 10um is as high as 99.6%, but it is difficult to capture fine particles below 10um (especially below PM2.5...

Claims

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Application Information

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IPC IPC(8): B03C3/014B03C3/013B03C3/02
Inventor 李宝才李洋李健
Owner SHIJIAZHUANG HULIN ENVIRONMENTAL PROTECTION EQUIP
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