摘要
在稳态膜渗透的基础上提出了一种新的非稳态渗透流程。该流程是一种循环操作过程,每一周期包含加压、抽真空以及排空三个阶段。实验研究了加压时间、抽真空时间和排空时间对空气分离制氧的产品平均纯度、平均流量和回收率的影响,并与稳态渗透实验结果进行了比较。结果表明,当富氧纯度相同时,变压渗透过程能够得到比稳态渗透更高的氧气回收率和富氧流量。
A novel unsteady-state membrane permeation process was proposed based on steady-state permeation. The process comprises three basic cyclic steps., feed pressurized, permeate withdrawn and residue vented. The effects of time of feed pressurizing , permeate sucking and residue venting on the average purity, flow rate and recovery of oxygen were studied experimentally for air separation to produce oxygen enriched air by this process. The effectiveness of the process was compared with that of steady-state permeation. The results show that the proposed process in this paper can achieve significantly higher oxygen recovery and flow rate than those of the conventional steady-state permeation when the oxygen purities of both are the same.
出处
《低温与特气》
CAS
2006年第4期22-25,共4页
Low Temperature and Specialty Gases
关键词
稳态
非稳态
变压渗透
膜
空气分离
steady-stage
unsteady-state
pressure swing permeation
membrane
air separation
