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真空 ›› 2021, Vol. 58 ›› Issue (4): 87-92.doi: 10.13385/j.cnki.vacuum.2021.04.16

• 真空应用 • 上一篇    下一篇

水蒸气等离子体发生器工作特性实验研究

涂军1, 宋文杰1, 张斌1, 余德平1, 李裔红2   

  1. 1.四川大学 机械工程学院,四川 成都 610065;
    2.核工业西南物理研究院,四川 成都 610041
  • 收稿日期:2020-12-07 出版日期:2021-07-25 发布日期:2021-08-05
  • 通讯作者: 余德平,教授,博导。
  • 作者简介:涂军(1995-),男,四川省乐山市人,硕士。
  • 基金资助:
    *国家自然科学基金面上项目(51875372); 四川大学自贡市2020年校地科技合作专项项目(2020CDZG-6)

Experimental Study on the Working Characteristics of Steam Plasma Torch

TU Jun1, SONG Wen-jie1, ZHANG Bin1, YU De-ping1, LI Yi-hong2   

  1. 1. School of Mechanical Engineering, Sichuan University, Chengdu 610065, China;
    2. Southwestern Institute of Physics, Chengdu 610041, China
  • Received:2020-12-07 Online:2021-07-25 Published:2021-08-05

摘要: 水蒸气等离子体射流具有较高的安全性、富含羟基组分、良好的环保特性、工作介质廉价等优点,在危废处理和化学合成等领域具有显著应用前景。但由于水蒸气在输运过程中易冷凝,严重影响水蒸气等离子体发生器的稳定性及电极使用寿命,制约着水蒸气等离子体发生器的工业化应用。本文针对水蒸气易冷凝的特点,提出了一系列防止水蒸气冷凝的措施,并设计了专用的水蒸气等离子体发生器,采用数据采集卡与光谱分析仪等对水蒸气等离子体发生器的工作特性进行了实验研究。实验结果表明:与常规的水蒸气等离子体发生器相比,经本文防冷凝优化后的水蒸气等离子体发生器电弧电压稳定性明显较好,同时等离子体发生器的电弧电压随电弧电流或水蒸气流量的增大而增大。羟基作为水蒸气等离子体射流中特有的还原性物质,其相对含量随电弧电流的增大而增大,但增大水蒸气流量,羟基自由基相对含量反而减少。

关键词: 水蒸气等离子体发生器, 伏安特性, 光谱分析, 羟基

Abstract: Steam plasma jet has the advantages of higher security, plenty of hydroxyl component, good environmental protection and cheap working medium, etc. It is a promising tool in the hazardous waste treatment and chemical synthesis. However, as steam is easy to condense during the transportation process, it will seriously affect the stability of plasma torch as well as its service life, limiting its wide application in industries. In this paper, a series of techniques were proposed to prevent the condensation of the steam. A special steam plasma torch was designed. A data acquisition system and optical emission spectrometer were used in experiments to reveal the working characteristics of this steam plasma torch. The experimental results show that the stability of the as-designed steam plasma generator is better than that of the conventional one. In addition, the arc voltage increases with the increases of the arc current or steam flow rate. As the special substance in steam plasma, the hydroxyl′s relative content increases with the increase of arc current, but decreases with the increase of the steam flow rate.

Key words: steam plasma torch, volt-ampere characteristics, spectral analysis, hydroxyl

中图分类号: 

  • O533
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