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Innocent treatment method for sulfuryl fluoride gas

A harmless treatment, sulfuryl fluoride technology, applied in chemical instruments and methods, separation methods, separation of dispersed particles, etc., can solve problems such as polluting the environment, endangering the health of surrounding residents, increasing greenhouse gas emissions, and achieving removal High efficiency, improved energy utilization efficiency, and low operating costs

Active Publication Date: 2011-02-16
ZHEJIANG UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Since sulfuryl fluoride has been used as a fumigant instead of methyl bromide for a short time, and the related hazards of sulfuryl fluoride have not attracted enough attention, so there is currently no uniform and feasible method for the harmless treatment of sulfuryl fluoride gas. The method is to use ventilation to discharge the residual sulfuryl fluoride waste gas into the atmosphere. This method not only pollutes the environment, increases greenhouse gas emissions, but also endangers the health of surrounding residents.

Method used

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  • Innocent treatment method for sulfuryl fluoride gas
  • Innocent treatment method for sulfuryl fluoride gas
  • Innocent treatment method for sulfuryl fluoride gas

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0016] The conditions of Example 1 are: power supply peak voltage 12kV, power supply discharge frequency 7.5kHz; gas flow rate 200ml / min, gas temperature: room temperature.

[0017] Example 1 processing results are shown in Table 1:

[0018] Table 1

[0019]

[0020] It can be seen from Table 1 that the removal efficiency of sulfuryl fluoride decreases with the increase of the inlet concentration. When the inlet concentration of sulfuryl fluoride is lower than 5000ppm, this method can completely remove sulfuryl fluoride gas.

example 2

[0021] Example 2, change the input voltage of the power supply, investigate the impact of injected energy density on the removal effect of sulfuryl fluoride, other conditions are as in Example 1, and the results are shown in Table 2:

[0022] Table 2

[0023] Import concentration (ppm)

[0024] It can be seen from Table 2 that the removal efficiency of sulfuryl fluoride increases with the increase of injected energy density. When the energy density is 1300J / L, the removal efficiency can reach 100%.

example 3

[0025] Example 3, change the discharge frequency, investigate the influence of the power supply frequency on the sulfuryl fluoride removal effect, other conditions are as in Example 1, and the results are as shown in Table 3:

[0026] table 3

[0027] Import concentration (ppm)

[0028] It can be seen from Table 3 that the removal efficiency of sulfuryl fluoride has an optimal value for the discharge frequency. When the discharge frequency is 8kHz, the removal efficiency can reach 100%.

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Abstract

The invention belongs to the technical field of gas pollutant treatment, in particular relates to an innocent treatment method for sulfuryl fluoride gas. The method comprises the following steps of: dividing a plasma reactor serving as a reactor into two stuffing cavities between two electrodes by gas distribution baffles at both ends and a porous baffle in the middle; and introducing sulfuryl fluorid-containing gas into the plasma reactor from a gas inlet, performing oxidization reaction and degradation reaction on the sulfuryl fluorid-containing gas and high-energy electrons and active particles which are generated by electric discharge and reacting with secondary stuffing in the plasma reactor and absorbing under the action of nonequilibrium plasma to generate non-toxic and innocent gas without greenhouse effect and discharging from a gas outlet. The method has the advantages that the sulfuryl fluoride is oxidized and degraded under the action of the nonequilibrium plasma by adopting a mode that the discharge plasma and the stuffing are in the same electric field simultaneously, and reacts with the stuffing loaded in the reactor simultaneously to be absorbed so as to promote the reaction to perform towards the innocent direction, and improve the desorption efficiency, and thus the utilization ratio of energy is improved.

Description

technical field [0001] The invention relates to the technical field of gas pollutant treatment, in particular to a method for harmlessly treating sulfuryl fluoride gas. Background technique [0002] Fluorine sulfate, as a fumigant instead of methyl bromide, has been gradually popularized and applied all over the world. Because sulfuryl fluoride has many characteristics such as strong diffusion and permeability, and broad-spectrum insecticide, it is more and more widely used in various aspects such as cargo ships, containers, storage, buildings, and food. However, as a fumigant, sulfuryl fluoride is necessarily toxic, and long-term exposure will have serious effects on human health, and even cause death. The latest research from the Massachusetts Institute of Technology in the United States found that sulfuryl fluoride is a strong greenhouse gas. The effect of 1 kg of sulfuryl fluoride emitted into the atmosphere on global warming is equivalent to 4,800 times that of 1 kg of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/74B01D53/68
Inventor 聂勇黄彤文计建炳顾大勇郑其锋吴晓程史蕾刘春晓赵纯中杨燕秋徐云庆
Owner ZHEJIANG UNIV OF TECH
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