METHOD FOR RECOVERING CRUDE LIGHT OIL IN GAS

PROBLEM TO BE SOLVED: To provide a method for recovering a crude light oil in gas which can suppress consumption of water vapor, fuel and electric power, and/or a method for recovering a crude light oil which can increase the recovery factor of a crude oil component. SOLUTION: The method for recovering a crude light oil component in a coke oven gas or a pyrolysis furnace gas comprises (1-1) determining by calculation the composition of the absorption oil at each part through which it circulates or (1-2) determining by analysis the composition of the absorption oil at each part where it circulates, (2) calculating from the composition the temperature at which the absorption oil starts to precipitate, and (3-1) setting the operation conditions at each part through which the absorption oil circulates at the temperature at which the absorption oil starts to precipitate or higher or (3-2) changing the composition of the absorption oil to be supplied to an absorption column so that the temperature at which the absorption oil starts to precipitate is lowered. COPYRIGHT: (C)2005,JPO&NCIPI