化工进展 ›› 2023, Vol. 42 ›› Issue (3): 1629-1637.DOI: 10.16085/j.issn.1000-6613.2022-0893

• 资源与环境化工 • 上一篇    下一篇

超声波与紫外线耦合脱气杀菌

谢迎春1,2(), 王倩倩2, 马永丽2(), 孙国强1, 刘明言2,3   

  1. 1.中核坤华能源发展有限公司,浙江 杭州 311113
    2.天津大学化工学院,天津 300350
    3.化学工程联合国家重点实验室(天津大学),天津 300350
  • 收稿日期:2022-05-16 修回日期:2022-08-28 出版日期:2023-03-15 发布日期:2023-04-10
  • 通讯作者: 马永丽
  • 作者简介:谢迎春(1973—),女,博士研究生,研究员级高级工程师,研究方向为能源与环保。E-mail:xieyc01@cnnp.com.cn

Ultrasonic and ultraviolet coupling degassing and sterilization

XIE Yingchun1,2(), WANG Qianqian2, MA Yongli2(), SUN Guoqiang1, LIU Mingyan2,3   

  1. 1.CNNC Kunhua Energy Development Company Limited, Hangzhou 311113, Zhejiang, China
    2.School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, China
    3.State Key Laboratory of Chemical Engineering(Tianjin University), Tianjin 300350, China
  • Received:2022-05-16 Revised:2022-08-28 Online:2023-03-15 Published:2023-04-10
  • Contact: MA Yongli

摘要:

鉴于地热尾水的脱气或杀菌主要是通过脱气罐和杀菌剂进行处理,本文提出了一种超声波-紫外线耦合的脱气杀菌处理技术。采用超声波-紫外线耦合技术对含微气泡含细菌水进行脱气杀菌处理。分别考察了不同水流量下的超声波脱气效率,不同流量、不同紫外线照射强度下的杀菌效率,以及超声波-紫外线耦合之后的脱气杀菌效率。结果表明,在较小水流量下,可除去部分气体;随着流量的增大,水中的气含率基本不变,脱气效果增加不再明显。在一定的紫外线照射强度下,较大流量时,杀菌效率约为90%以上;在较小流量时,杀菌效率为60%~80%。考虑是由于较大流量下,湍动程度相对较高以及停留时间较短所致。与单独超声波脱气相比,耦合技术的脱气效率基本不变,杀菌效率在90%左右,确定最优的实验操作参数为20kHz、0.15m3/h和2000μW/cm2

关键词: 超声波, 脱气, 紫外线, 杀菌, 地热水, 流动, 停留时间分布, 气含率

Abstract:

At present, the degassing and sterilization treatment of geothermal tail water is mainly carried out by degassing tanks and bactericides. This paper proposed an ultrasonic-ultraviolet coupling degassing and sterilization treatment technology. Ultrasonic-ultraviolet coupling technology was used to degas and sterilize water containing microbubbles and bacteria. The ultrasonic degassing efficiency under different flow conditions, the sterilization efficiency under different flow rates and different ultraviolet irradiation intensity, and the degassing and sterilization efficiency after ultrasonic-ultraviolet coupling were investigated respectively. The results showed that part of the gas can be removed under small flow rate; with the increase of the water flow rate, the gas holdup in the water was basically unchanged and the degassing effect does not increase significantly. Under a certain ultraviolet irradiation intensity, when the water flow was small, the sterilization efficiency was 60%—80%;when the water flow was large, the sterilization efficiency was more than 90%, which was considered to be due to the relatively high turbulence degree and short residence time at large flow rates. Compared with the ultrasonic degassing alone, the degassing efficiency of ultrasonic-ultraviolet coupling was basically unchanged, and the sterilization efficiency was about 90%. The optimal experimental operating parameters are finally determined to be 20kHz, 0.15m3/h and 2000μW/cm2.

Key words: ultrasonic, degassing, ultraviolet, sterilization, geothermal water, flow, residence time distribution, gas holdup

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