Simulation of an atmospheric pressure microwave plasma jet system and treatment of waste H2S
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摘要: 对常压微波等离子体炬装置及H2S废气的处理进行了研究。介绍了一种具有特殊喷嘴结构的微波等离子体炬装置，模拟了不同喷嘴结构下谐振腔中微波电场的强度及分布，在此基础上，进行了H2S废气处理的实验研究。结果表明：采用新型喷嘴结构在喷嘴尖端产生的电场强度和分布更利于等离子体炬的激发，微波功率为500 W时，喷嘴尖端处的电场强度在1.5106 V/m以上，远大于氩气的击穿电场强度，能有效地激发等离子体炬；当H2S气体与Ar气体流量比为10∶90，总流量为1000 mL/min，微波功率为1000 W时，H2S的转化率最大达91.32%；大气微波等离子体炬能有效地处理H2S废气。实验结果证明了模拟结果的正确性和装置的有效性。Abstract: The treatment of H2S gas by the atmospheric pressure microwave plasma jet(AMPJ) technology and the AMPJ system were studied. The design of this AMPJ system with special nozzle structure is presented in this paper. The microwave electric field intensity and distribution with different nozzle structures were simulated at the same time. Furthermore, the treatment of H2S gas was discussed. The results show that the new nozzle structure is more conductive to the plasma jet ignition the electric field strength at the position of tip nozzle is above 1.5106 V/m when the microwave power is 500 W, which is higher than the breakdown field strength of the working gases. The maximum conversion of H2S can be up to 91.32% when the ratio of H2S and Ar is 10∶90, and the total flow is 1000 mL/min, as well as the microwave power is 1000 W. The H2S gas can be effectively disposed with the AMPJ system.
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Key words:
- microwave /
- plasma jet /
- nozzle /
- H2S
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