径向流氦氢分离床穿透特性实验与模拟分析

TL92.2; 为系统深入研究径向流氦氢分离床的吸附穿透性能,指导结构设计,本研究借助COMSOL Multiphysics软件耦合材料吸氢动力学方程、流体流动动量方程和质量传递方程,建立了径向床穿透数学模型,并结合实验验证了模型的可靠性,利用模型对特性参数进行参数化扫描,分析其对穿透性能的影响.结果表明,穿透实验结果与模拟数据符合较好,模型可靠.通过分析温度、高径比及孔隙率等参数对床体穿透性能的影响,推荐氦氢分离床床体参数如下:床体吸附温度为室温～343 K,在该温度范围内升高温度对传质区长度及出口处浓度-时间曲线影响较小;随着高径比的增加,床体效率明显下降,其中高径比为2.00～8.33时...

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Published in原子能科学技术 Vol. 58; no. 1; pp. 181 - 188
Main Authors 丁卫东, 占勤, 杨洪广, 连旭东
Format Journal Article
LanguageChinese
Published 中国原子能科学研究院反应堆工程技术研究所,北京 102413 2024
Subjects
radial flow
穿透特性
径向流
氦氢分离床
helium-hydrogen separation bed
数值模拟
numerical simulation
breakthrough capacity
Online AccessGet full text
ISSN1000-6931
DOI10.7538/yzk.2022.youxian.0862

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Abstract TL92.2; 为系统深入研究径向流氦氢分离床的吸附穿透性能,指导结构设计,本研究借助COMSOL Multiphysics软件耦合材料吸氢动力学方程、流体流动动量方程和质量传递方程,建立了径向床穿透数学模型,并结合实验验证了模型的可靠性,利用模型对特性参数进行参数化扫描,分析其对穿透性能的影响.结果表明,穿透实验结果与模拟数据符合较好,模型可靠.通过分析温度、高径比及孔隙率等参数对床体穿透性能的影响,推荐氦氢分离床床体参数如下:床体吸附温度为室温～343 K,在该温度范围内升高温度对传质区长度及出口处浓度-时间曲线影响较小;随着高径比的增加,床体效率明显下降,其中高径比为2.00～8.33时,维持高效率的时间较长;随着孔隙率的增加,床体吸附效率明显下降,考虑床层的吸附效率、压阻效应及粉末的装填难度,粉末孔隙率推荐0.56～0.64.以上结果表明,本研究建立的模型可较好地预测床体的吸附分离性能,可用于床体结构设计以及工艺参数的优化.
AbstractList TL92.2; 为系统深入研究径向流氦氢分离床的吸附穿透性能,指导结构设计,本研究借助COMSOL Multiphysics软件耦合材料吸氢动力学方程、流体流动动量方程和质量传递方程,建立了径向床穿透数学模型,并结合实验验证了模型的可靠性,利用模型对特性参数进行参数化扫描,分析其对穿透性能的影响.结果表明,穿透实验结果与模拟数据符合较好,模型可靠.通过分析温度、高径比及孔隙率等参数对床体穿透性能的影响,推荐氦氢分离床床体参数如下:床体吸附温度为室温～343 K,在该温度范围内升高温度对传质区长度及出口处浓度-时间曲线影响较小;随着高径比的增加,床体效率明显下降,其中高径比为2.00～8.33时,维持高效率的时间较长;随着孔隙率的增加,床体吸附效率明显下降,考虑床层的吸附效率、压阻效应及粉末的装填难度,粉末孔隙率推荐0.56～0.64.以上结果表明,本研究建立的模型可较好地预测床体的吸附分离性能,可用于床体结构设计以及工艺参数的优化.
Abstract_FL Helium-hydrogen separation bed is an important part of tritium extraction system.In order to deeply study penetration performance of the radial flow bed and guide the structure design,the mathematical model of radial bed breakthrough capacity was established by coupling material hydrogen absorption kinetics equation,mass trans-fer equation and fluid flow momentum equation in COMSOL Multiphysics,which was used to carry out parametric scanning of the characteristic parameters,and the effect of the model on the breakthrough capacity was analyzed.The results show that the break-through experiment results are in good agreement with the simulated data,and the model is reliable.The effect of temperature,height-diameter ratio and porosity on the breakthrough capacity was analyzed.The adsorption temperature of the bed is from room temperature to 343 K.In this temperature range,increasing the temperature has less effect on the length of the mass transfer zone and the concentration-time curve at the outlet.With the increase of the height-diameter ratio,the efficiency of the bed decreases significantly,in which the high efficiency is maintained for a longer period of time when the hieght-diameter ratio is 2.00-8.33.With the increase of porosity,the adsorption efficiency of the bed decreases significantly.Considering the adsorption efficiency,the flow resistance and the difficulty of powder loading,the powder porosity is recommended from 0.56 to 0.64.Therefore,the model established in this study can better predict the adsorption performance,and can be used to optimize the structure design basis and process parameters.
Author 杨洪广
连旭东
丁卫东
占勤
AuthorAffiliation 中国原子能科学研究院反应堆工程技术研究所,北京 102413
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Author_FL DING Weidong
ZAN Qin
LIAN Xudong
YANG Hongguang
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DocumentTitle_FL Experimental and Simulation Analysis of Breakthrough Capacity of Radial Flow Helium-hydrogen Separation Bed
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Keywords radial flow
穿透特性
径向流
氦氢分离床
helium-hydrogen separation bed
数值模拟
numerical simulation
breakthrough capacity
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Title 径向流氦氢分离床穿透特性实验与模拟分析
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