System for flare gas recovery using gas sweetening process
AssigneeSaudi Arabian Oil Company
InventorAhmed Khalifah Al Muhsen
Life of this patent
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Abstract
A flare gas recovery system includes a primary gas sweetening unit; and a liquid-driven ejector in continuous fluid communication with the primary gas sweetening unit. The ejector includes an inlet configured to receive a motive fluid including a regenerable amine solvent in a rich state from the primary gas sweetening unit; a gas inlet configured to receive a suction fluid including a gas; and a fluid outlet configured to either directly or indirectly discharge to the primary gas sweetening unit a two-phase fluid including a mixture of the suction fluid and the amine solvent in a rich state.
Claims38
A flare gas recovery system, the system comprising:
- a primary gas sweetening unit;
- and
- a liquid-driven ejector in continuous fluid communication with the primary gas sweetening unit, the ejector comprising:
- an inlet configured to receive a motive fluid comprising a regenerable amine solvent in a rich state from the primary gas sweetening unit;
- a gas inlet configured to receive a suction fluid comprising a gas;
- and
- a fluid outlet configured to either directly or indirectly discharge to the primary gas sweetening unit a two-phase fluid comprising a mixture of the suction fluid and the amine solvent in a rich state.
A method of supplying flare gas for a flare gas recovery system, the method comprising:
- supplying a flow of flare gas to an ejector of the flare gas recovery system;
- supplying a continuous flow of regenerable amine solvent in a rich state to the ejector from a primary gas sweetening unit that is in fluid communication with the flare gas recovery system;
- and
- combining the flare gas and solvent together in the ejector to form a two-phase fluid,
- wherein the continuous flow of the solvent is configured to increase pressure of the flare gas to allow for delivery of the two-phase fluid either directly or indirectly back to the primary gas sweetening unit.
A flare gas recovery system, the system comprising:
- a primary gas sweetening unit;
- and
- a liquid-driven ejector in continuous fluid communication with the primary gas sweetening unit, the ejector comprising:
- an inlet configured to receive a motive fluid comprising a regenerable amine solvent in a lean state from the primary gas sweetening unit;
- a gas inlet configured to receive a suction fluid comprising a gas;
- and
- a fluid outlet configured to either directly or indirectly discharge to the primary gas sweetening unit a two-phase fluid comprising a mixture of the suction fluid and the amine solvent in a rich state.
A method of supplying flare gas for a flare gas recovery system, the method comprising:
- supplying a flow of flare gas to a flare gas ejector of the flare gas recovery system;
- supplying a continuous flow of a lean or sour gas stream to the ejector;
- combining the flare gas and lean or sour gas stream together in the ejector to form a mixed gas fluid,
- supplying a flow of the mixed-gas fluid to an amine ejector of a gas sweetening unit;
- supplying a continuous flow of regenerable amine solvent in a lean state 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 solvent together in the amine ejector to form a two-phase fluid,
- 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.
Dependencies are inferred from the claim text.