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Device for treating malodorous gas based on capacitive coupling partition discharge plasma

A discharge plasma and capacitive coupling technology, which is applied in separation methods, dispersed particle separation, chemical instruments and methods, etc., can solve the problems of small plasma, poor stability, unevenness, etc., and improve discharge stability and reaction time Short, no secondary pollution effect

Active Publication Date: 2013-09-18
NANJING UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the above-mentioned deficiencies in the existing plasma treatment of malodorous pollutants, the purpose of the present invention is to provide a device for treating malodorous gases based on capacitively coupled partitioned discharge plasma, which solves the problem of small-scale plasma generated by traditional plasmas under atmospheric pressure. Problems of unevenness and poor stability

Method used

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  • Device for treating malodorous gas based on capacitive coupling partition discharge plasma
  • Device for treating malodorous gas based on capacitive coupling partition discharge plasma

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Experimental program
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Effect test

Embodiment 1

[0034] Such as figure 1 As shown, the output voltage of high-frequency power supply 1 is 0-15KV, and the output power is 200W. The matching network 2 is used to adjust the resistance-capacitance matching between the power supply and the electrode circuit load, to stabilize and control the discharge; the adjustable capacitance is 30pF, and the plate electrode 4 is Copper metal electrodes, needle electrodes 5 are copper electrodes with a cross-sectional diameter of 2mm, each capacitance connected to the needle electrodes 5 is 20pF, and the distance between the plate electrodes 4 and the needle electrodes 5 is 5mm. The activated carbon filling area 8 is filled with cylindrical granular activated carbon with a cross-sectional diameter of 2mm and a length of 3-5mm. The malodorous gas to be treated is methyl sulfide CH 3 SCH 3 , the initial concentration is 500mg / m 3 , The gas processing flow rate is 1L / min.

[0035] The malodorous gas methyl sulfide passes through the air inlet...

Embodiment 2

[0037] With embodiment 1, only the malodorous gas methyl sulfide processed in embodiment 1 is changed into ammonia, and its initial concentration is 200mg / m 3 , The gas treatment flow rate is 1L / min, the exhaust gas after treatment has no pungent smell, and the treatment efficiency of ammonia gas is above 96%.

Embodiment 3

[0039] Same as embodiment 1, only the malodorous gas methyl sulfide processed in embodiment 1 is changed into formaldehyde gas, and the initial concentration of formaldehyde is 600mg / m 3 , The gas treatment flow rate is 1L / min, the exhaust gas after treatment has no pungent smell, and the formaldehyde treatment efficiency is over 97%.

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Abstract

The invention discloses a device for treating malodorous gas based on capacitive coupling partition discharge plasma. The device comprises a shell, and a high-frequency power supply and a matching network which are arranged outside the shell, wherein the shell is internally and sequentially provided with a flat-plate electrode, a needle electrode fixing plate and a grid plate at intervals from bottom to top; one ends of a plurality of needle electrodes on the needle electrode fixing plate correspond to the flat-plate electrode, and the other ends of the needle electrodes are respectively connected with a low-voltage electrode of the high-frequency power supply in parallel by a capacitor; the flat-plate electrode is connected with a high-voltage electrode of the high-frequency power supply by an adjustable capacitor outside the shell; an air guide hole is formed in the middle of the flat-plate electrode; the shell above the grid plate is internally filled with activated carbon to form an activated carbon filling area. The device for treating malodorous gas has the advantages of being high in treatment efficiency, short in reaction time, free from secondary pollution, etc.

Description

technical field [0001] The invention belongs to the field of treatment of industrial malodorous gas pollutants, in particular to a device for treating malodorous gas based on capacitive coupling partition discharge plasma. Background technique [0002] Odor pollutants refer to all gaseous substances that stimulate the olfactory organs to cause people's unpleasantness and damage the living environment. It is one of the typical public hazards. The malodorous substances are widely distributed and have a wide range of influence. The stench produced by some pollution sources can spread from several kilometers to tens of kilometers in radius. There are many sources of stench, mainly from: industrial production waste gas stench, agricultural and animal husbandry stench, stench produced by urban public facilities, etc. Malodorous substances can be divided into 5 categories according to their composition: (1) sulfur-containing compounds (such as H 2 S, mercaptans and thioethers); (...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/76B01D53/72B01D53/58
Inventor 孙亚兵荣少鹏何东赵泽华
Owner NANJING UNIV
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