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

doi:10.16183/j.cnki.jsjtu.2020.223

Abstract

Abstract:

To meet the requirements of the low background and high sensitivity of the large-scale dark-matter detector PandaX-4T, n_Kr/n_Xe≤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

CLC Number:

TB657.6

SHA Haidong, HUANG Peiyao, WANG Zhou, CUI Xiangyi, JU Yonglin, YAN Rui, LI Shuaijie, WANG Xiuli. Simulation and Optimization of Ultra-High Purity Krypton/Xenon Cryogenic Distillation System Based on HYSYS[J]. Journal of Shanghai Jiao Tong University, 2021, 55(7): 842-849.

Figures/Tables 11

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References 18

[1]	季向东, 刘江来, 谌勋. PandaX实验介绍和进展[J]. 科学通报, 2016, 61(20): 2264-2272.
	JI Xiangdong, LIU Jianglai, CHEN Xun. Status and plan of the PandaX experiment[J]. Chinese Science Bulletin, 2016, 61(20): 2264-2272.
[2]	CAO X G, CHEN X, CHEN Y H, et al. PandaX: A liquid xenon dark matter experiment at CJPL[J]. Science China Physics, Mechanics & Astronomy, 2014, 57(8): 1476-1494.
[3]	TAN A, XIAO M, CUI X, et al. Dark matter results from first 98.7 days of data from the PandaX-II experiment[J]. Physical Review Letters, 2016, 117(12): 121303. doi: 10.1103/PhysRevLett.117.121303 URL
[4]	CUI X Y, ABDUKERIM A, CHEN W, et al. Dark matter results from 54-ton-day exposure of PandaX-II experiment[J]. Physical Review Letters, 2017, 119(18): 181302. doi: 10.1103/PhysRevLett.119.181302 URL
[5]	WANG Z, BAO L, HAO X H, et al. Large scale xenon purification using cryogenic distillation for dark matter detectors[J]. Journal of Instrumentation, 2014, 9(11): 11024.
[6]	王舟, 张华, 巨永林. 暗物质探测器的液氙低温精馏系统研制[J]. 上海交通大学学报, 2013, 47(8): 1282-1286.
	WANG Zhou, ZHANG Hua, JU Yonglin. Design and construction of a cryogenic distillation system of liquid xenon for dark matter detector[J]. Journal of Shanghai Jiao Tong University, 2013, 47(8): 1282-1286.
[7]	崔祥仪. PandaX-II暗物质实验与PandaX-4T制冷循环与精馏系统[D]. 上海: 上海交通大学, 2019.
	CUI Xiangyi. PandaX-II dark matter experiment and the PandaX-4T cryogenics, circulation and distillation system[D]. Shanghai: Shanghai Jiao Tong University, 2019.
[8]	WANG Z, BAO L, HAO X H, et al. Design and construction of a cryogenic distillation device for removal of krypton for liquid xenon dark matter detectors[J]. The Review of Scientific Instruments, 2014, 85(1): 015116. doi: 10.1063/1.4861537 URL
[9]	ABE K, HOSAKA J, IIDA T, et al. Distillation of liquid xenon to remove krypton[J]. Astroparticle Physics, 2009, 31(4): 290-296. doi: 10.1016/j.astropartphys.2009.02.006 URL
[10]	刘洁净, 张华, 王经. 垂直管道低温汽液两相流流型识别的实验研究[J]. 上海交通大学学报, 2010, 44(8): 1135-1139.
	LIU Jiejing, ZHANG Hua, WANG Jing. Study on flow regime identification of cryogenic vapor-liquid two phase flows in vertical pipes[J]. Journal of Shanghai Jiao Tong University, 2010, 44(8): 1135-1139.
[11]	MAITI D, JANA A K, SAMANTA A N, et al. Heat integration in batch distillation column[J]. AIP Conference Proceeding, 2010, 1298:244-249.
[12]	PULIDO J L, MARTÍNEZ E L, WOLF M R, et al. Heat transfer study of Heat Integrated Distillation Column (HIDC) using simulation techniques[J]. AIP Conference Proceeding, 2011, 1373:242-254.
[13]	李虎林. 低温精馏分离¹³C的耦合传递理论与试验研究[D]. 上海: 上海交通大学, 2011.
	LI Hulin. Theoretical and experimental study on the coupling transfer of ¹³C separation by cryogenic distillation[D]. Shanghai: Shanghai Jiao Tong University, 2011.
[14]	邓修, 吴俊生. 化工分离工程 [M]. 北京: 科学出版社, 2002: 41-42.
	DENG Xiu, WU Junsheng. Chemical separation engineering[M]. Beijing: Science Press, 2002: 41-42.
[15]	SOAVE G. Equilibrium constants from a modified Redlich-Kwong equation of state[J]. Chemical Engineering Science, 1972, 27(6): 1197-1203. doi: 10.1016/0009-2509(72)80096-4 URL
[16]	袁春伟. 一种统一处理稀溶液的温度、压力和浓度关系的方法[J]. 大学化学, 1993, 8(5): 16-18.
	YUAN Chunwei. A method to deal with the relationship among temperature、 pressure and concentration of dilute solution[J]. University chemistry, 1993, 8(5): 16-18.
[17]	黄沛尧. 超高纯气体低温精馏塔内气相负荷的热力分析[D]. 上海: 上海交通大学, 2019.
	HUANG Peiyao. Thermal analysis of gas phase load in ultra-high purity gas cryogenic distillation column[D]. Shanghai: Shanghai Jiao Tong University, 2019.
[18]	严锐. PandaX-4T超高纯氪氙低温精馏系统运行分析[DB-OL]. [2020-11-28]. https://kns.cnki.net/kns8/defaultresult/index.
	YAN Rui. Operation analysis of pandaX-4T ultra-high purity xenon cryogenic distillation system for removal of Krypton[DB-OL]. [2020-11-28]. https://kns.cnki.net/kns8/defaultresult/index.

项目	塔板数	理论塔板高度/cm	产品氙中氪的摩尔分数	废品氙中氪的摩尔分数	再沸器负荷/W	再沸器温度/K	塔内压力/ kPa	进料流量/ (kg·h^-1)	塔顶流量/ (kg·h^-1)
实验结果	17	35	<7.8×10^-12	1×10^-6	118	179.8	221	10	0.1
模拟结果	17	35	4.1×10^-14	8×10^-5	119	179.7	221	10	0.1