聚甲基戊烯膜式人工肺的氧气传质测试及模型计算  

Test and model calculation of oxygen mass transfer process through polymethylpentene membrane artificial lung

作　　者：梁亚静 臧慧 樊文玲[2] 李磊[1] Liang Yajing;Zang Huil;Fan Wenling;Li Lei(School of Chemistry and Chemical Engineering,Nanjing University,Nanjing,210023,China;School of Pharmacy,Nanjing University of Chinese Medicine,Nanjing,210023,China)

机构地区：[1]南京大学化学化工学院,南京210023 [2]南京中医药大学药学院,南京210023

出　　处：《南京大学学报（自然科学版）》2022年第4期713-719,共7页Journal of Nanjing University（Natural Science）

摘　　要：使用聚甲基戊烯中空纤维膜式人工肺进行气液两侧的氧气传质研究.膜组件中模拟液分别为去离子水、生理盐水、甘油-水溶液和亚硫酸钠水溶液,模拟液在膜丝外部流动,同时氧气在膜丝内部流动,二者都通过膜传质溶解在模拟液中.氧气传质测试中维持氧气进气压力为0.3 MPa,模拟液流速为500 mL·min,考察膜组件长度、温度、模拟液种类和运行时间等因素对氧气传质性能的影响.传质测试结果表明:氧气传质速率随着膜组件长度的增加和温度的提高有一定程度的增大,同时随着模拟液黏度的增大而有所减小;另外,随着测试时间的增长,氧气传质速率有所下降.此外,依据双膜理论,结合质量守恒方程以及传质阻力层方程建立了基于中空纤维膜组件的氧气传质数学模型,计算值与实验值的平均误差在15%以内.这对中空纤维膜组件的结构优化和气液传质过程的模拟计算具有一定的参考意义.Polymethylpentene hollow fiber membrane artificial lung was used to study the oxygen mass transfer process on both sides of gas-liquid. The model fluids in the membrane module such as deionized water, physiological saline, glycerol-water solution and sodium sulfite aqueous solution,flew outside the membrane fibers,while oxygen flew inside the membrane fibers,permeated through the membrane walls and was dissolved in the model fluids. In the test of oxygen mass transfer process, the oxygen inlet pressure was maintained at 0.3 MPa,and the flow rate of the model liquid was set as 500 mL·min. The effects of the length of membrane module,feed temperature,type of model liquid and run time on the oxygen mass transfer performance were investigated,respectively. The test results of mass transfer process showed that the oxygen mass transfer rate increased with the rising module length and the elevated temperature,and decreased with the increasing viscosity of the model liquid. At the same time the oxygen mass transfer rate decreased as the run time increased. In addition,based on the double-membrane theory,combined with the mass conservation equation and the mass transfer resistance layer equation,a mathematical model of oxygen mass transfer process based on hollow fiber membrane modules was established. The average error between the calculated and experimental transport results was within 15%. This work is very referential for the structural optimization of hollow fiber membrane modules and the simulation calculation of gas-liquid mass transfer process.

关 键 词：聚甲基戊烯 中空纤维膜式人工肺 氧气传质性能 模拟液 传质数学模型 

分 类 号：TQ021.4[化学工程]