Method for removing and recovering volatile organic components

Details Method for removing and recovering volatile organic components Method for removing and recovering volatile organic components

1995-05-04

1997-10-21

Kilner, Christopher

Refrigeration

Cryogenic treatment of gas or gas mixture

Liquefaction

62632, 62634, F25J 300

Patent

active

056784236

ABSTRACT:
A method for the recovery of volatile organic components (VOC) released when loading liquid hydrocarbons into a storage or cargo tank, is described. The VOCs issuing from the tank are compressed, and injected into a sidestream taken from the main hydrocarbon stream, which is cooled and used as the absorbing medium, and is conducted to a VOC recovery unit comprising at least a bi-phase rotary separator turbine (BRST). In the BRST the VOC-containing gas is substantially separated into a VOC component and inert gas. The inert gas is vented to the atmosphere. The VOC component or VOC-enriched liquid stream is then returned to the main cargo stream or a cargo tank. Any methane contained in the volatile gases issuing from the cargo tank, instead of being vented to the atmosphere, is recovered or a catalytic process is used to convert methane to carbon dioxide and water for discharge to the atmosphere. The system is particularly intended for the offshore loading of oil into tankers.

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patent: 4680042 (1987-07-01), Mehra
patent: 4948394 (1990-08-01), Rojey
patent: 5076822 (1991-12-01), Hewitt
patent: 5176002 (1993-01-01), O'Brien et al.
patent: 5315832 (1994-05-01), Hopewell

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