Patent ID: 11865493
Assignee: SAUDI ARABIAN OIL COMPANY
Field: Chemical engineering (Chemistry)
Classification: CPC B  C  E  F | IPC B  F

Claim 9:
10. A method of supplying flare gas for a flare gas recovery system, the method comprising:
supplying a flow of flare gas as a suction fluid to a flare gas ejector of the flare gas recovery system;
supplying a continuous flow of a lean gas stream ora sour gas stream as a motive fluid to the flare gas ejector;
combining the flare gas as the suction fluid, and the lean gas stream or the sour gas stream as the motive fluid, together in the flare gas ejector to form a mixed gas fluid,
supplying a flow of the mixed-gas fluid as a suction fluid to an amine ejector of a gas sweetening unit;
supplying a continuous flow of a regenerable amine liquid solvent in a lean state as a motive fluid to the amine ejector from the primary gas sweetening unit that is in fluid communication with the flare gas recovery system; and
combining the mixed-gas fluid and the regenerable amine liquid solvent in the lean state together in the amine ejector to form a two-phase fluid that comprises a mixture of the suction fluid and the regenerable amine liquid solvent in a rich state,
wherein the continuous flow of the solvent is configured to increase pressure of the mixed-gas fluid to allow for delivery of the two-phase fluid either directly or indirectly back to the primary gas sweetening unit.