Method for removing sulfuryl fluoride by coupling plasma and chemical absorbing

A plasma and chemical absorption technology, applied in chemical instruments and methods, separation methods, dispersed particle separation, etc., can solve problems such as secondary pollution, and achieve the effects of low operating costs, simple process flow, and health protection.

Active Publication Date: 2012-06-27
ZHEJIANG UNIV OF TECH
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Problems solved by technology

[0004] Non-equilibrium plasma treatment of exhaust gas technology has been deeply studied and has been used to remove NO X , SO 2 And VOCs, etc., non-equilibrium plasma can be generated by gas discharge, including glow discharge,

Method used

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  • Method for removing sulfuryl fluoride by coupling plasma and chemical absorbing
  • Method for removing sulfuryl fluoride by coupling plasma and chemical absorbing
  • Method for removing sulfuryl fluoride by coupling plasma and chemical absorbing

Examples

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example 1

[0026] Example 1, in the experiment, the plasma reaction reactor adopts such as figure 1 In the line-barrel reactor shown, the discharge form adopts dielectric barrier discharge, the gas-liquid absorption tower is a packed tower with a diameter of 20mm and a height of 740mm, and the concentration of lye is 0.1mol / L NaOH solution. The plasma reactor consists of a quartz tube with an inner diameter of 35mm and a wall thickness of 2.5mm, a stainless steel rod discharge electrode, a stainless steel wire mesh ground electrode wrapped around the quartz tube, and 2-4mm quartz glass beads filled between the two discharge electrodes. Sulfuryl fluoride gas, plasma discharge gas products and products after lye absorption are analyzed by gas chromatography GC9790 equipped with FPD detector and Fourier transform infrared analyzer Nicolet. The detection sensitivity of gas chromatography is 1ppm, which is lower than the national emission standard ≤ 5ppm.

[0027] Discharge parameters: peak v...

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Abstract

The invention belongs to the technical field of gas pollutant treatment and provides a method for removing sulfuryl fluoride by coupling plasma and chemical absorbing, which is used for removing residual sulfuryl fluoride gas after fumigating. The treatment process of the method comprises: introducing a gas containing sulfuryl fluoride into a plasma reactor, wherein the sulfuryl fluoride decomposes into harmful gas products including sulfur oxide and fluoride under the action of the plasma; and introducing the gas product of the reaction into a gas liquid absorbing tower to absorb the gas by alkali liquor, and thus removing the sulfuryl fluoride waste gas in a harmless manner. The method has the advantage that after the sulfuryl fluoride is removed by coupling a plasma technique and chemical absorption, the treated gas reaches national discharge standards. Compared with discharging the sulfuryl fluoride into the atmosphere through ventilation at present, the method protects natural environment and human health. In addition, with simple process flow and low operation cost, the method is more suitable for on-site use.

Description

technical field [0001] The invention belongs to the technical field of gas pollutant treatment, and mainly relates to a method for removing sulfuryl fluoride by plasma coupled chemical absorption. Background technique [0002] Sulfuryl fluoride, as a fumigant instead of methyl bromide, has been gradually promoted and applied worldwide. However, the toxicity of sulfuryl fluoride can damage the central nervous system. Long-term exposure will seriously affect human health and even cause death. According to the latest research findings show that: sulfuryl fluoride is a strong greenhouse gas. The global warming effect of one kilogram of sulfuryl fluoride discharged into the atmosphere is 4800 times that of one kilogram of carbon dioxide, and the content of sulfuryl fluoride in the air is increasing at a rate of 5% per year, and can exist in the air for about 36 years. Therefore, in order to protect human health and the natural environment, the harmless treatment of residual fumi...

Claims

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Application Information

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IPC IPC(8): B01D53/75B01D53/70
Inventor 聂勇郑其锋顾大勇计建炳黄彤文
Owner ZHEJIANG UNIV OF TECH
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