Study of double-chamber air arc plasma torch and the application in solid-waste disposal  

作　　者：Yawen CAO Bin LI Xianwei HAN Chang TAN Zhihao ZHANG Xizhe ZHANG Jianguo WEI 曹亚文;李斌;韩先伟;谭畅;张志豪;张晰哲;魏建国(Shanxi Key Laboratory of Plasma Physics and Applied Technology,Xi'an 710100,People's Republic of China;State Key Laboratory of Liquid Rocket Science and Technology,Xi'an 710100,People's Republic of China;Academy of Aerospace Propulsion Technology,Xi'an 710100,People's Republic of China)

机构地区：[1]Shanxi Key Laboratory of Plasma Physics and Applied Technology,Xi'an 710100,People's Republic of China [2]State Key Laboratory of Liquid Rocket Science and Technology,Xi'an 710100,People's Republic of China [3]Academy of Aerospace Propulsion Technology,Xi'an 710100,People's Republic of China

出　　处：《Plasma Science and Technology》2021年第6期48-58,共11页等离子体科学和技术（英文版）

基　　金：supported by National Key R&D Program of China(No.2019YFC1907000);National Natural Science Foundation of China(No.11475131)。

摘　　要：Arc plasma can be applied in hazardous solid waste disposal for higher temperature than common heating methods,but some practical issues exist in practical engineering application.In this study,an air arc plasma torch with double chambers and magnetic controlling is designed to realize wide variable power and long electrode life.The detailed characteristics and laws of the air arc are studied.The condition parameters of arc current(I),air flow rate(G)and the structure parameters of inlet area ratios and electrode diameters influence both the arc voltage and arc root positions.The arc rotating driven by magnetic field effectively lengthens the electrode life.The gasification process and product of organic wastes by air plasma are influenced largely by the waste compositions and the air flow rate.A furnace structure with more even atmosphere and longer residence time should be considered for better gasification.Oxygen-deficient environment is important to suppress NOxformation during the application of air plasma.Inorganic solid wastes can be melt by the air plasma and cooled down to form compact vitreous structures in which heavy metals can be locked and the leaching rates significantly decrease down.

关 键 词：air arc plasma electrical characteristic electrode life GASIFICATION MELTING 

分 类 号：X705[环境科学与工程—环境工程] O539[理学—等离子体物理]