Journal of Shanghai Jiao Tong University ›› 2021, Vol. 55 ›› Issue (7): 842-849.doi: 10.16183/j.cnki.jsjtu.2020.223

Special Issue: 《上海交通大学学报》2021年12期专题汇总专辑 《上海交通大学学报》2021年“机械工程”专题

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Simulation and Optimization of Ultra-High Purity Krypton/Xenon Cryogenic Distillation System Based on HYSYS

SHA Haidong1, HUANG Peiyao3, WANG Zhou4, CUI Xiangyi5, JU Yonglin2(), YAN Rui2, LI Shuaijie4, WANG Xiuli2   

  1. 1. College of Energy and Mechanical Engineering, Shanghai University of Electric Power, Shanghai 200090, China
    2. Institute of Refrigeration and Cryogenics, Shanghai Jiao Tong University, Shanghai 200240, China
    3. Paris Tech Elite Institute of Technology, Shanghai Jiao Tong University, Shanghai 200240, China
    4. Institute of Particle and Nuclear Physics, Shanghai Jiao Tong University, Shanghai 200240, China
    5. Tsung-Dao Lee Institute, Shanghai Jiao Tong University, Shanghai 200240, China
  • Received:2020-07-14 Online:2021-07-28 Published:2021-07-30
  • Contact: JU Yonglin


To meet the requirements of the low background and high sensitivity of the large-scale dark-matter detector PandaX-4T, nKr/nXe≤1×10 -13 (n is the amount of substance) is required. The ultra-high purity krypton/xenon cryogenic distillation tower was used as an example in this paper. First, the distillation tower and the construction design of the distillation system were briefly introduced. Then, the operation parameters of the distillation tower were simulated and optimized by using HYSYS, and the distributions of the pressure, temperature and Kr concentration in the distillation tower were obtained. After that, the influences of those operational conditions including the feeding point position, the reflux ratio, the feeding flowrate, the heat of the reboiler, the flowrate of the off-gas, and the feeding pressure to the xenon purity of the distillation system were studied, and the optimized operation parameters were proposed. When the column pressure is set at 221 kPa and the reflux radio is set at 145, the krypton content in xenon can be purified from 5×10-7 to 4.1×10-14, which has an important guiding significance for further improvement of the purity of the xenon product of the xenon/krypton cryogenic distillation system.

Key words: cryogenic distillation, dark matter detection, HYSYS simulation

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