초록 ▼

A cryogenic system for recovering a gas product stream and a liquid product stream from a hydrocarbon gas stream is provided which operates at process temperature of -50°F. or less. A portion of a refrigerating liquid stream and a cooled liquid stream produced during operation of the cryogenic syste

A cryogenic system for recovering a gas product stream and a liquid product stream from a hydrocarbon gas stream is provided which operates at process temperature of -50°F. or less. A portion of a refrigerating liquid stream and a cooled liquid stream produced during operation of the cryogenic system are passed heat exchange relationship with an inlet vapor stream and define a partially closed refrigeration loop. The partially closed refrigeration loop permits the low process temperatures to be achieved.

대표청구항 ▼

A process for recovering a gas product stream and a liquid product stream from a hydrocarbon gas stream comprising: (a) separating the hydrocarbon gas stream into a first liquid stream and an inlet vapor stream; (b) cooling the inlet vapor stream in a heat exchange means to a preselected processing

A process for recovering a gas product stream and a liquid product stream from a hydrocarbon gas stream comprising: (a) separating the hydrocarbon gas stream into a first liquid stream and an inlet vapor stream; (b) cooling the inlet vapor stream in a heat exchange means to a preselected processing temperature of at least below about -50°F.; (c) separating the cooled inlet vapor stream into a first non-condensible vapor stream and a second liquid stream; (d) flashing the second liquid stream to form an outlet vapor stream and a refrigerating fluid stream; (e) expanding at least a portion of the refrigerating fluid stream to reduce the pressure of the refrigerating fluid stream to less than about 25 psig and the temperature of the refrigerating fluid stream below about -70°F.; (f) passing the portion of refrigerating fluid stream through the heat exchange means in heat exchange relationship to the inlet vapor stream; (g) compressing and separating the refrigerating fluid stream to provide a compressed vapor stream, a fluid stream and a third liquid stream; (h) expanding the third liquid stream of step (g) to produce a cooled third liquid stream; (i) passing the cooled third liquid stream of step (h) to the heat exchange means in heat exchange relationship to the inlet vapor stream; (j) stabilizing the first liquid stream of step (a) and the fluid stream of step (g) to produce a second non-condensible vapor stream and the liquid product stream; and (k) removing the first non-condensible vapor stream of step (c), the outlet vapor stream of step (d) and the second non-condensible vapor stream of step (j) as the gas product stream.