System for concentrating a spent caustic stream

Details System for concentrating a spent caustic stream System for concentrating a spent caustic stream

1991-12-23

1993-05-11

Manoharan, Virginia

Distillation: processes, separatory

Flash vaporization of distilland

159 21, 159 471, 159DIG8, 159DIG16, 159DIG34, 159DIG37, 159 23, 202202, 202205, 203 25, 203 94, 203 98, 203DIG8, 203DIG14, 423183, 423204, B01D 306, B01D 310

Patent

active

052098281

ABSTRACT:
A system and method of concentrating spent caustic at a refinery has a multi-stage flash drum for separating a spent caustic stream into an overhead output stream including vaporized water and volatile organic compounds, and a concentrated spent caustic output stream. The system also has a condenser for condensing the overhead output stream, and a separator for separating the condensed overhead output stream into a volatile organic compound stream, a liquid hydrocarbon stream and a water stream. The system further has an ejector for applying a vacuum to the flash drum to vaporize the spent caustic stream at a reduced temperature, and to the separator to remove the volatile organic compound stream. The volatile organic compounds are removed from the overhead of the separator through the ejector to a burner of a fired heater.

REFERENCES:
patent: 1883211 (1932-10-01), Wilson
patent: 2022037 (1935-11-01), Hanchett
patent: 2562495 (1951-07-01), Hulme
patent: 2631926 (1953-03-01), Eckstrom
patent: 3216796 (1965-11-01), Robbins et al.
patent: 3332470 (1967-07-01), Chirico et al.
patent: 3380806 (1968-04-01), Bradburg et al.
patent: 3963424 (1976-06-01), Bella, Jr.
patent: 4441958 (1984-04-01), Teucci
patent: 4783242 (1988-11-01), Robbins

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