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公开(公告)号：US5983664A
公开(公告)日：1999-11-16
申请号：US54802
申请日：1998-04-03
CPC分类号： F25J3/0209 , F25J3/0219 , F25J3/0233 , F25J3/0238 , F25J2200/02 , F25J2200/50 , F25J2200/70 , F25J2200/76 , F25J2205/04 , F25J2210/12 , F25J2235/60 , F25J2240/02
摘要： A process for the recovery of ethane, ethylene, propane, propylene and heavier hydrocarbon components from a hydrocarbon gas stream is disclosed. In recent years, the preferred method of separating a hydrocarbon gas stream generally includes supplying at least a portion of the gas stream to a work expansion device, then directing the work expanded stream to a distillation column at a mid-column feed point below an upper rectification section. The top column feed above the upper rectification section is typically a condensed and subcooled gaseous stream, frequently comprised of a gas stream that would otherwise feed the work expansion device. In the process disclosed, the work expanded stream is further cooled prior to feeding the distillation column at the mid-column feed point, so that a lesser volume of top column feed is required to maintain the column overhead temperature at a temperature whereby the major portion of the desired components is recovered.
摘要翻译： 公开了从烃气流中回收乙烷，乙烯，丙烷，丙烯和较重烃组分的方法。 近年来，分离烃气流的优选方法通常包括将至少一部分气体流供应到工作膨胀装置，然后将工作膨胀流引导到蒸馏塔，该蒸馏塔位于上部下方的中间柱进料点 整改部分。 上部精馏段上方的顶部塔进料通常是冷凝的和过冷的气态物流，其通常由气流组成，否则气体将进料工作膨胀装置。 在所公开的方法中，将工作膨胀的料流进一步冷却，然后在中间塔进料点进料蒸馏塔，使得需要较少量的顶部塔进料以将塔顶馏出物温度保持在一定温度， 的所需组分被回收。
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公开(公告)号：US5881569A
公开(公告)日：1999-03-16
申请号：US915065
申请日：1997-08-20
IPC分类号： F25J3/02
CPC分类号： F25J3/0242 , F25J3/0209 , F25J3/0219 , F25J3/0233 , F25J3/0238 , F25J2200/02 , F25J2200/70 , F25J2200/76 , F25J2205/04 , F25J2210/06 , F25J2210/12 , F25J2230/30 , F25J2235/60 , F25J2240/02 , F25J2245/02 , F25J2270/02 , F25J2270/12 , F25J2270/60
摘要： A process for the recovery of ethane, ethylene, propane, propylene and heavier hydrocarbon components from a hydrocarbon gas stream is disclosed. The stream is divided into first and second streams, and the second stream is expanded to the fractionation tower pressure and supplied to the column at a mid-column feed position. A recycle stream is withdrawn from the tower overhead after it has been warmed and compressed, and is combined with the first stream. The combined stream is cooled to condense substantially all of it, and is thereafter expanded to the fractionation tower pressure and supplied to the fractionation tower at a top column feed position. The pressure of the compressed recycle stream and the quantities and temperatures of the feeds to the column are effective to maintain the column overhead temperature at a temperature whereby the major portion of the desired components is recovered.
摘要翻译： 公开了从烃气流中回收乙烷，乙烯，丙烷，丙烯和较重烃组分的方法。 将该流分成第一和第二流，并将第二流扩展至分馏塔压力，并在中间柱进料位置供应至塔。 在塔架顶部被加热和压缩之后，再循环流从第一塔流出。 将合并的流冷却以基本上将其冷凝，然后将其扩展至分馏塔压力，并在顶部塔进料位置供应至分馏塔。 压缩的再循环料流的压力以及进料塔的进料的数量和温度对塔顶温度的维持是有效的，从而回收主要部分的所需组分。
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