Closed loop single mixed refrigerant process

Details Closed loop single mixed refrigerant process Closed loop single mixed refrigerant process

1996-02-28

1997-08-19

Kilner, Christopher

Refrigeration

Cryogenic treatment of gas or gas mixture

Liquefaction

62623, F25J 300

Patent

active

056576439

ABSTRACT:
An improved closed loop single mixed refrigerant process and system for cooling a fluid material through a temperature range exceeding 200.degree. F. by heat exchange with a single mixed refrigerant in a closed loop refrigeration cycle comprising: compressing the mixed refrigerant in a first stage compressor; cooling the compressed mixed refrigerant from the first stage compressor to produce a first mixture of a first condensed portion of the mixed refrigerant, and a gaseous refrigerant; separating the first condensed portion of the mixed refrigerant from the gaseous refrigerant; passing the gaseous refrigerant to a second stage compressor and further compressing the gaseous refrigerant; cooling the second stage compressed gaseous refrigerant to produce a second mixture of a second condensed portion of the gaseous refrigerant and a second gaseous refrigerant; separating the second condensed portion of the gaseous refrigerant and the second gaseous refrigerant; combining the first condensed portion of the mixed refrigerant with the second condensed portion of the gaseous refrigerant and the second gaseous refrigerant; charging the compressed mixed refrigerant to a refrigeration zone where the compressed mixed refrigerant is cooled to produce a liquid, mixed refrigerant, and expanded to produce a low temperature coolant; passing the low temperature coolant in countercurrent heat exchange with the compressed mixed refrigerant and the fluid material to produce the liquid, mixed refrigerant, a cooled, liquid, fluid material and gaseous mixed refrigerant; and recycling the gaseous mixed refrigerant to the first stage compressor.

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