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Method for removing NO in fog through low-temperature plasma

A low-temperature plasma and plasma technology, which is applied in separation methods, chemical instruments and methods, gas treatment, etc., can solve problems such as air pollution, and achieve the effects of recycling, simple process and cost reduction.

Inactive Publication Date: 2017-11-14
GUANGDONG J TECH ENVIRONMENT SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, the method also has the advantages of high efficiency, convenience and easy control, and can effectively realize the conversion of NO, thereby solving the problem of air pollution.

Method used

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  • Method for removing NO in fog through low-temperature plasma
  • Method for removing NO in fog through low-temperature plasma

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] simulated flue gas consisting of 6% O 2 , 12% CO 2 and NO concentration of 235ppm, with N2 as the balance gas, with pure air, pure N 2 , pure CO 2 , 1.94% NO and 2.0% SO2 are prepared and mixed completely in the mixing chamber before entering the NTP reactor, and the mist is generated by an ultrasonic atomizer, and enters the corona discharge area along with the simulated flue gas passing through, where The simulated smoke and fog is 2L / min. The experiment was carried out at atmospheric pressure and room temperature, and the parameters of the NTP reactor were set as follows: the power supply is a positive DC high-voltage power supply, the voltage is 25kV, the discharge current is 5mA, and the discharge electrode is a stainless steel rod with continuous equidistant sawtooth blades , the thickness of the tooth piece is 1.0mm, the number of the tooth piece is 6 pieces, and the number of tooth tips is 4, and the discharge gap of the discharge electrode is 38mm. NO, NO ...

Embodiment 2

[0045] simulated flue gas consisting of 6% O 2 , 12% CO 2 and NO at a concentration of 235ppm, expressed as N 2 As balance gas, use pure air, pure N 2 , pure CO 2 , 1.94% NO and 2.0% SO 2 The prepared product is completely mixed in the mixing chamber before entering the NTP reactor, and the mist is generated by the ultrasonic atomizer, and enters the corona discharge area along with the simulated flue gas passing through, where the simulated flue gas and mist are 2L / min . The experiment was carried out at atmospheric pressure and room temperature, and the parameters of the NTP reactor were set as follows: the power supply is a negative polarity DC high-voltage power supply, the voltage is 25kV, the discharge current is 5mA, and the discharge electrode is a stainless steel rod with continuous equidistant sawtooth blades , the thickness of the tooth piece is 1.0mm, the number of the tooth piece is 6 pieces, and the number of tooth tips is 4, and the discharge gap of the dis...

Embodiment 3

[0047] simulated flue gas consisting of 6% O 2 , 12% CO 2 and NO at a concentration of 235ppm, expressed as N 2 As balance gas, use pure air, pure N 2 , pure CO 2 , 1.94% NO and 2.0% SO 2 The prepared product is completely mixed in the mixing chamber before entering the NTP reactor, and the mist is generated by the ultrasonic atomizer, and enters the corona discharge area along with the simulated flue gas passing through, where the simulated flue gas and mist are 2L / min . The experiment was carried out at atmospheric pressure and room temperature, and the parameters of the NTP reactor were set as follows: the power supply is a positive polarity DC high-voltage power supply, the voltage is 30kV, the discharge current is 5mA, and the discharge electrode is a stainless steel rod with continuous equidistant sawtooth blades , the thickness of the tooth piece is 1.2mm, the number of the tooth piece is 8 pieces, and the number of tooth tips is 6, and the discharge gap of the dis...

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Abstract

The invention discloses a method for removing NO in fog through low-temperature plasma. The method comprises the following steps: introducing fog containing flue gas into a plasma reactor and utilizing the plasma generated in a corona discharge area of the plasma reactor to oxidize the NO in the fog containing flue gas into NO2, wherein the generated NO2 is absorbed by the fog due to the strong hydrophilia, and meanwhile, the fog is captured by the reactor wall under the effect of electric field force and the flow of the fog containing flue gas introduced into the plasma reaction is 1.5-3L / min. According to the method disclosed by the invention, the NO in the fog can be removed and the sulfur dioxide in the flue gas also can be removed, so that various pollutants can be simultaneously removed according to the method disclosed by the invention and the investment and running cost for flue gas treatment can be greatly reduced.

Description

technical field [0001] The invention belongs to the technical field of nitrogen oxide removal, and in particular relates to a method for removing NO in mist by low-temperature plasma. Background technique [0002] Coal burning is the main source of air pollution in my country, which will produce sulfur dioxide (SO 2 ), nitrogen oxides (NO x ) and other atmospheric pollutants, among which SO 2 and nitric oxide (NO) lead to deterioration of local air quality and cause environmental problems such as smog, acid rain, and photochemical smog. Since the late 1990s, in order to control SO 2 The government vigorously applies the flue gas desulfurization (FGD) process to coal-fired power plants, industrial boilers, metallurgical furnaces, and petrochemical industries. Among the existing FGD processes, wet flue gas desulfurization (WFGD) is used in more than 90% of desulfurization systems because of its advantages of high removal efficiency, stable operation, and relatively low inv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/32
CPCB01D53/32B01D2257/302B01D2257/404B01D2259/818Y02A50/20
Inventor 朱天乐胡小吐谢德援刘勇钟璐薛学良杨颖欣胡静龄
Owner GUANGDONG J TECH ENVIRONMENT SCI CO LTD