中间气两步充压对快速真空变压吸附制氧的影响  

Effect of two-step pressurization with intermediate gas on rapid vacuum pressure swing adsorption process for oxygen generation

作　　者：祝显强 刘应书[1,3] 杨雄[1] 刘文海[1] 李永玲[1] 

机构地区：[1]北京科技大学能源与环境工程学院,北京100083 [2]江苏昊泰气体设备科技有限公司,江苏丹阳212300 [3]北京科技大学冶金工业节能减排北京市重点实验室,北京100083

出　　处：《化工学报》2016年第10期4264-4272,共9页CIESC Journal

基　　金：国家自然科学基金项目(51306017);应急救生呼吸装备关键技术及产业化资助项目(Z141100000714007)~~

摘　　要：针对快速变压吸附制氧浓度和回收率低问题,提出了用于提高产氧浓度和回收率的中间气两步充压的快速真空变压吸附流程,并对该流程进行了研究。结果表明:在快速真空变压吸附制氧过程中,中间气先在出气端充压可以有效提高产氧浓度,之后再在进气端充压可提高氧气回收率。出气端充压前中间气压力及氧浓度和进气端充压后床层压力是影响产氧浓度和回收率提高的关键参数。当吸附和解吸压力分别为240、60 k Pa时,循环氧气回收率为34.57%,且每天产单位吨氧需吸附剂量为61.18 kg·TPD-1。An improved rapid vacuum pressure swing adsorption（RVPSA） process, namely, two-step pressurization with intermediate gas, was proposed to improve performance of miniature oxygen concentrators, which were based on rapid pressure swing adsorption（RPSA） technology. The experimental results on the new process show that pressurization with intermediate gas at the exhaust end could effectively improve oxygen purity and re-pressurization with intermediate gas at the feed end could improve recovery. The pressure and oxygen purity of intermediate gas at the exhaust end before pressurization as well as the bed pressure after re-pressurization of intermediate gas at the feed end were key parameters for improving oxygen purity and recovery of the production. At the adsorption pressure of 240 k Pa and the desorption pressure of 60 k Pa, the improved RVPSA process exhibited recovery of recycling oxygen up to 34.57% and the BSF at 61.18 kg·TPD-1 for producing a ton of oxygen per day.

关 键 词：吸附 分离 制氧 充压 数值模拟 

分 类 号：TQ028.1[化学工程]