公开(公告)号：EP2984428A2

公开(公告)日：2016-02-17

申请号：EP14712742.7

申请日：2014-03-24

申请人： Costain Oil, Gas&Process Limited

发明人： JOHNSON, Grant Leigh ,  FINN, Adrian Joseph

IPC分类号： F25J3/02

CPC分类号： F25J3/0209 ,  F25J3/0233 ,  F25J3/0257 ,  F25J2200/08 ,  F25J2200/72 ,  F25J2200/74 ,  F25J2200/78 ,  F25J2220/62 ,  F25J2220/66 ,  F25J2235/60 ,  F25J2270/02 ,  F25J2270/88 ,  Y02B30/52 ,  Y02C10/12

摘要： There is provided a process for the separation of a gaseous feed comprising a mixture of nitrogen, hydrocarbons and at least 0.005 mol% carbon dioxide, the process comprising: (i) cooling and at least partially condensing the gaseous feed, and (ii) separating in one or more stages the cooled and at least partially condensed gaseous feed into a hydrocarbon rich product stream low in nitrogen and a nitrogen rich reject stream low in hydrocarbons, and wherein refrigeration is provided to one or more stages of the separation process by a heat pump system in which a heat pump refrigerant fluid is compressed and subsequently expanded at one or more pressure levels below the condensing pressure, and subsequently heated in heat exchange with the gaseous feed and/or one or more streams generated by the separation process to provide refrigeration thereto; and further wherein at least part of the heated refrigerant is recycled through the heat pump system. There is also provided an apparatus for the separation of a gaseous feed comprising a mixture of nitrogen, hydrocarbons and at least 0.005 mol% carbon dioxide.