Method for improving efficiency of electric deduster for removing particulate matter 2.5 (PM2.5) dust in flue gas

An electrostatic precipitator and removal efficiency technology, which is applied in the field of improving the removal efficiency of PM2.5 dust in flue gas by electrostatic precipitators, can solve the problems of conflicting, different experimental conditions, and lack of consensus, and achieve two The effect of reducing secondary dust, improving dust removal efficiency and improving removal efficiency

Inactive Publication Date: 2013-12-04
国家电投集团远达环保装备制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the complexity of the problem of acoustic reunion, different experimental conditions, and limitations of testing methods, so far, no consensus has been reached on some key issues, and some conclusions are even contradictory, resulting in this technology still in experimental stage

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The injection amount of water vapor is designed to be 0.1kg / m3, the temperature of water vapor is 100°C, and it is injected by reverse spraying; the frequency of ultrasonic wave is selected as 30kHZ, and the power of ultrasonic wave is 400W. After the flue gas is pretreated and enters the electrostatic precipitator, the highest removal efficiency of PM2.5 is above 99%.

Embodiment 2

[0020] The injection amount of water vapor is designed to be 0.02kg / m3, the temperature of water vapor is 150°C, and the water vapor enters through sequential spraying; the frequency of ultrasonic wave is selected as 20kHZ, and the power of ultrasonic wave is 80W. After the flue gas is pretreated and enters the electrostatic precipitator, the highest removal efficiency of PM2.5 can reach more than 95%.

Embodiment 3

[0022] The injection amount of water vapor is designed to be 0.06kg / m3, the temperature of water vapor is 120°C, and it is injected by reverse oblique spray (30 degree angle); the frequency of ultrasonic wave is selected as 25kHZ, and the power of ultrasonic wave is 200W. After the flue gas is pretreated and enters the electrostatic precipitator, the highest removal efficiency of PM2.5 can reach more than 97%.

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PUM

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Abstract

The invention relates to the environmental protection technology field of flue gas, and particularly relates to a method for improving efficiency of an electric deduster for removing particulate matter 2.5 (PM2.5) dust in the flue gas. The flue gas is pretreated before entering the electric deduster, and a treatment method of coupling ultrasonic reunion by water vapor spraying is used for pretreatment; further the water vapor can be sprayed by cis-spraying, reverse spraying or sprayed with a certain angle with the flow direction of the flue gas, the spraying quantity of the water vapor is designed to be 0.02-0.1 kg/m<3>, and the temperature of the water vapor is 100-150 DEG C; and further while the water vapor is sprayed into the flue gas, the flue gas is also treated by ultrasonic, the ultrasonic frequency is selected to be 20 kHZ-30 kHZ, and the ultrasonic power is selected to be 80 W-400 W. After the pretreatment of the flue gas, the highest removal efficiency of the PM2.5 can reach above 99%.

Description

technical field [0001] The invention relates to the technical field of flue gas environmental protection, in particular to a method for improving the removal efficiency of PM2.5 dust in flue gas by an electrostatic precipitator. Background technique [0002] Ultrafine PM2.5 mainly comes from human activities such as fuel combustion, such as coal combustion in the energy industry sector, exhaust emissions from motor vehicles, condensation and coalescence of metal vapor during metal smelting, and combustion of residential stoves. my country's energy structure is dominated by coal, and coal combustion accounts for more than 70% of the primary energy. The emission of ultrafine particles caused by coal combustion is an important source of pollution. [0003] According to relevant industry statistical reports, the total amount of dust emissions in my country currently exceeds 10 million tons, and the annual emissions of the power industry alone reach 3.6 million tons, accounting f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03C3/01B03C3/014B03C3/016
Inventor 沈伯雄陈茂荣沈万素徐忠俊
Owner 国家电投集团远达环保装备制造有限公司
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