摘要
针对尿残液强酸强腐蚀性、物质含量高的特点,开发以质子膜为介质的间接加热气扫式膜蒸馏技术,完成尿残液的水分回收,以进一步提高空间站环控生保系统水资源闭合度.对比研究了7种质子膜材料的气相和液相两种接触模式下的蒸馏速率,获得质子膜材料的主动吸水、水分传输和尿残液耐受能力等特性.建立了尿残液液相接触模式下的传质传热理论模型,考察了质子膜厚度、尿残液物质浓度、进气流量、进气湿度和进气温度等5个主要变量对蒸馏速率的影响规律,其中进气湿度对蒸馏速率有着相对较大的影响.理论计算所得蒸馏速率与实测值之间的相对标准偏差为5.8%,验证了模型的有效性.研究结果为尿残液水分回收技术的开发和应用提供了理论和实验依据.
Water recovery from urine brine is vital to improving water closure in the environmental control and life support system of the space station.Considering the unique properties of high acidity,strong corrosion and complex composition of urine brine,we have developed indirect heated sweeping gas membrane distillation technology with a ionomer membrane as medium.In this study,distillation rates of seven proton membrane materials under two contact modes of gas phase and liquid phase were obtained to compare their capacity for active water adsorption,water transport and urine brine tolerance.A theoretical model of mass and heat transfer was established under the mode of liquid phase contact of urine brine to investigate the influence of five main factors on the distillation rate,including membrane thickness,urine brine concentration,inlet air flow,inlet air humidity and inlet air temperature.Consequently,the inlet air humidity posed a stronger impact on the distillation rate.The relative standard deviation between the calculated distillation rate and the measured value was 5.8%,which verified the validity of the theoretical model.These results will provide a theoretical and experimental guidance for the development and application of water recovery technology for urine brine.
作者
张非凡
张良长
薛玉荣
李森
田科
吴志强
ZHANG Feifan;ZHANG Liangchang;XUE Yurong;LI Sen;TIAN Ke;WU Zhiqiang(College of Environment and Resources,Xiangtan University,Xiangtan 411105,China;China Astronaut Research and Training Center,Beijing 100094,China)
出处
《湘潭大学学报（自然科学版）》
CAS
2024年第1期58-69,共12页
Journal of Xiangtan University(Natural Science Edition)
基金
人因工程重点实验室稳定支持项目(GJSD18001)。
关键词
质子膜
传热传质
环控生保
尿处理
ionomer membrane
heat and mass transfer
environmental control and life support system
urine treatment
