变压吸附空分制氧和CO分离在煤化工中的应用

Oxygen Separation from Air and CO Separation by PSA

介绍了近年研发成功对煤化工有重要意义的气体分离新技术。一是用高效空分制氧吸附剂的大型真空变压吸附(VPSA)空分制氧。单套装置产氧规模可达10000 m3/h,纯度90%~95%,能耗0.33~0.35 kWh/m3O2,开停车快,操作弹性大,已建成20多套装置。在用氧量【20000 m3/h而又不需用高纯氧的场合,用变压吸附空分制氧生产成本和投资比深冷法低得多。二是用CO高效吸附剂的大型真空变压吸附(VPSA)分离CO,可从水煤气或半水煤气中分离出高质量的CO(纯度可达99.9%)。

Two new technologies about gas separation by PSA are reported in this paper.①Highly efficient adsorbent and VPSA technology for large scale oxygen separation from air.More than 20 large scale VPSA-O2 units have been build in China to supply cheap oxygen for metallurgy and other industries.The units can produce oxygen 10 000 m3/h.With a purity of 90%-95%,the energy cost of 0.33-0.35 kWh/m3 O2.And it is fastin starting and stopping,and flexible in operation.The cost is low when the O2 demand is under 20.000 m3/h and not the high purity.②Highly efficient CO adsorbent and VPSA technology for large scale CO separation.The CO adsorbent is made by monolayer dispersion of CuCl on a zeolite.The adsorbent has very high capacity and selectivity for CO,because the adsorbent has a great amount of Cu+ ions on its surface.Using this adsorbent,a VPSA process has been developed and more than ten large scale VPSA-CO units have been build in China to supply high purity CO(>99%).