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

Yawen CAO (曹亚文); Bin LI (李斌); Xianwei HAN (韩先伟); Chang TAN (谭畅); Zhihao ZHANG (张志豪); Xizhe ZHANG (张晰哲); Jianguo WEI (魏建国)

doi:10.1088/2058-6272/abedf2

Plasma Science and Technology > 2021 > 23(6): 64006-064006. > DOI: 10.1088/2058-6272/abedf2

Yawen CAO (曹亚文), Bin LI (李斌), Xianwei HAN (韩先伟), Chang TAN (谭畅), Zhihao ZHANG (张志豪), Xizhe ZHANG (张晰哲), Jianguo WEI (魏建国). Study of double-chamber air arc plasma torch and the application in solid-waste disposal[J]. Plasma Science and Technology, 2021, 23(6): 64006-064006. DOI: 10.1088/2058-6272/abedf2

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

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

Funds: This work is supported by National Key R&D Program of China (No. 2019YFC1907000) and National Natural Science Foundation of China (No. 11475131).

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Received Date: November 02, 2020
Revised Date: March 09, 2021
Accepted Date: March 10, 2021

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Abstract

Abstract

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 NO_x formation 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.
- air arc plasma,
- electrical characteristic,
- electrode life,
- gasification,
- melting

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References

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