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Abstract

A process is disclosed for producing a chilled water stream by the integration of a sorption cooling section with a fluid catalytic cracking (FCC) process. The hot and cold working fluids for operation of the sorption cooling section are withdrawn directly from liquid streams in the FCC process in a novel flow scheme which employs a side draw stream to provide the hot working fluid and the liquid condensed from the overhead of the FCC main fractionator as the cold working fluid. The hot exit stream and the warm exit stream are cross-exchanged to smooth out the temperature variations which reduce the size and operating cost of producing the chilled stream. Potential damage to equipment and variation operations can be avoided by selecting the location of the side draw stream to avoid the accumulation of non-condensables in the heat exchange equipment. The process provides significant economic benefits operating cost savings in refinery and petrochemical applications where fractionation column overhead liquids are available at waste heat temperatures above about 80.degree. C. (176.degree. F.) such as fluid catalytic cracking, synthetic crude oil fractionation, crude phenol fractionation, benzene, toluene, xylene, ethylbenzene, and cumene columns and naphtha splitter columns.

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First Claim