公开(公告)号：US20120151962A1

公开(公告)日：2012-06-21

申请号：US12972988

申请日：2010-12-20

申请人： Hengky Mualim ,  Ralls Lee ,  Bhadra S. Grover

发明人： Hengky Mualim ,  Ralls Lee ,  Bhadra S. Grover

IPC分类号： F25J3/00

CPC分类号： B01D53/002 ,  B01D53/047 ,  B01D2256/16 ,  B01D2256/24 ,  B01D2256/245 ,  B01D2259/416 ,  C01B3/506 ,  C01B3/56 ,  C01B2203/043 ,  C01B2203/046 ,  C01B2203/048 ,  C01B2203/146 ,  F25J3/0219 ,  F25J3/0233 ,  F25J3/0238 ,  F25J3/0252 ,  F25J2205/04 ,  F25J2205/40 ,  F25J2205/60 ,  F25J2210/04 ,  F25J2210/12 ,  F25J2215/62 ,  F25J2230/08 ,  F25J2230/30 ,  F25J2245/02 ,  Y02P30/48

摘要： A method for the recovery of ethylene from an off-gas is provided. This method includes providing an ethylene containing feed gas stream, introducing the ethylene containing gas stream into a first cryogenic separation device, thereby producing a first condensed stream and a first ethylene poor stream, and introducing the ethylene poor stream into a first feed compressor, thereby producing a pressurized first ethylene poor stream. This is repeated three times, resulting in a pressurized third ethylene poor stream, which is introduced into a pressure swing adsorber, thereby producing a high purity hydrogen stream and a PSA tail gas stream. The PSA tail gas stream is into a PSA tail gas compressor, thereby producing a pressurized PSA tail gas stream, which is then combined with an ethylene containing gas stream to produce the ethylene containing feed gas stream. The first condensed stream, the second condensed stream and the third condensed stream are combined to produce a combined condensed stream, which is introduced into an ethylene separation column thereby producing an ethylene rich stream and a methane rich stream. The methane rich stream is introduced into a methane compressor thereby producing a methane fuel stream.

摘要翻译： 提供了从废气中回收乙烯的方法。 该方法包括提供含乙烯的进料气流，将含乙烯气流引入第一低温分离装置，从而产生第一冷凝流和第一乙烯不良流，并将乙烯不良流引入第一进料压缩机，由此 产生加压的第一乙烯不良流。 这重复三次，导致加压的第三乙烯不良流，其被引入变压吸附器，由此产生高纯度氢气流和PSA尾气流。 PSA尾气流进入PSA尾气压缩机，从而产生加压的PSA尾气流，然后将其与含乙烯气流组合以产生含乙烯的原料气流。 将第一冷凝物流，第二冷凝物流和第三冷凝物流合并以产生组合的冷凝物流，将其引入乙烯分离塔，从而产生富含乙烯的物流和富含甲烷的物流。 将富甲烷流引入甲烷压缩机中，从而产生甲烷燃料流。