Method and apparatus for cooling a hydrocarbon stream

F - Mech Eng,Light,Heat,Weapons – 25 – J

Patent

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Details

F25J 1/02 (2006.01) F25B 7/00 (2006.01) F25B 9/00 (2006.01) F25B 49/02 (2006.01)

Patent

CA 2692967

A mixed refrigerant stream (10) comprising a first mixed refrigerant is passed through one or more heat exchangers (12) to provide a cooled mixed refrigerant stream (20). At least a fraction of a cooling stream (30) comprising a second mixed refrigerant is expanded (14) to provide one or more expanded cooling streams (40a), at least one of which may be passed through one or more of the heat exchangers (12), to cool the mixed refrigerant stream (10) thereby providing the cooled mixed refrigerant stream (20) which is used to cool (22) a hydrocarbon stream (70). The temperature (T1) and the flow (F1) of at least part of the cooled mixed refrigerant stream (20) is monitored, and the flow (F2) of the cooling stream (30) is controlled using the flow F1 and the temperature T1.

Un courant réfrigérant mixte (10) comprenant un premier réfrigérant mixte est amené à passer à travers un ou plusieurs échangeurs de chaleur (12) pour fournir un courant réfrigérant mixte refroidi (20). Au moins une fraction d'un courant de refroidissement (30) comprenant un second réfrigérant mixte est expansée pour fournir un ou plusieurs courants de refroidissement expansés (40a), dont au moins l'un peut être amené à passer à travers un ou plusieurs des échangeurs de chaleur (12), pour refroidir le courant réfrigérant mixte (10), permettant ainsi de fournir le courant réfrigérant mixte refroidi (20). La température (T1) et l'écoulement (F1) d'au moins une partie du courant réfrigérant mixte refroidi (20) sont surveillés, et l'écoulement (F2) du courant de refroidissement (30) est contrôlé à l'aide de l'écoulement F1 et de la température T1.

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