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1. 发明授权

US5779768A Recovery of volatile organic compounds from gas streams 失效
标题翻译：从气流中回收挥发性有机化合物
公开(公告)号：US5779768A
公开(公告)日：1998-07-14
申请号：US619846
申请日：1996-03-19
申请人： Madhu Anand , Shivaji Sircar , Augustine Ivanhoe Dalton
发明人： Madhu Anand , Shivaji Sircar , Augustine Ivanhoe Dalton
IPC分类号： B01D53/00 , B01D53/04 , B01D53/047
CPC分类号： B01D53/0462 , B01D53/002 , B01D2253/102 , B01D2253/104 , B01D2253/106 , B01D2253/108 , B01D2256/10 , B01D2256/16 , B01D2256/18 , B01D2257/708 , B01D2259/40047 , B01D2259/40056 , B01D2259/40081 , B01D2259/4009 , B01D2259/402
摘要： A condensable component present at low concentration in a feed gas mixture containing the condensable component and a noncondensable component is recovered by selective adsorption from the feed gas mixture in an adsorption step, the resulting adsorbed condensable component is desorbed by a heated purge gas in a regeneration step to yield a purge gas effluent enriched in desorbed condensable component, and the purge gas effluent is cooled to condense and recover the condensable component as a liquid. An improvement comprises, during a time period of the regeneration step in which the concentration of the condensable component in the purge gas effluent reaches a maximum value, (a) dividing the purge gas effluent into a first and a second portion, (b) cooling the first portion of the purge gas effluent to a temperature sufficient to condense substantially all of the condensable component present therein and recovering the resulting condensate therefrom, and (c) cooling a second portion of the purge gas effluent and combining the resulting cooled gas stream with the feed gas mixture to yield a total feed mixture for the adsorption step.
摘要翻译：通过在吸附步骤中从进料气体混合物中选择性吸附来回收在含有可冷凝组分和不可冷凝组分的进料气体混合物中低浓度存在的可冷凝组分，所得吸附的可冷凝组分在再生中被加热的吹扫气体解吸逐步产生富集解吸的可冷凝组分的吹扫气体流出物，并将吹扫气体流出物冷却以冷凝并回收可冷凝组分作为液体。改进包括在再生步骤的时间段内，其中净化气体流出物中的可冷凝组分的浓度达到最大值，（a）将净化气体流出物分成第一和第二部分，（b）冷却净化气体流出物的第一部分达到足以冷凝基本上所有可冷凝组分的温度并从其中回收所得的冷凝物，和（c）冷却第二部分吹扫气流出物并将所得到的冷却气流与进料气体混合物以产生用于吸附步骤的总进料混合物。

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