초록 ▼

A PSA process and system utilizes a combination of cyclic feed, evacuation, purge, and repressurization steps to provide a final gas product enriched in one of the feed components. The process is carried out in a simple system which utilizes a single two-way four-port valve for controlling gas flow

A PSA process and system utilizes a combination of cyclic feed, evacuation, purge, and repressurization steps to provide a final gas product enriched in one of the feed components. The process is carried out in a simple system which utilizes a single two-way four-port valve for controlling gas flow between an adsorber vessel and a blower, and the blower is used for the introduction of feed gas into the adsorber and the evacuation of gas from the adsorber. The control of gas flow in either direction between the adsorber vessel and a product gas storage tank is accomplished by two check valves installed in parallel between the vessel and the tank.

대표청구항 ▼

[ What is claimed is:] [1.] A pressure swing adsorption process for the separation of a pressurized feed gas containing at least one more strongly adsorbable component and at least one less strongly adsorbable component which comprises the steps of:(a) introducing the pressurized feed gas at a feed

[ What is claimed is:] [1.] A pressure swing adsorption process for the separation of a pressurized feed gas containing at least one more strongly adsorbable component and at least one less strongly adsorbable component which comprises the steps of:(a) introducing the pressurized feed gas at a feed pressure into a feed end of an adsorber vessel containing a solid adsorbent which preferentially adsorbs the more strongly adsorbable component, withdrawing from a product end of the adsorber vessel an adsorber effluent gas enriched in the less strongly adsorbable component, and introducing at least a portion of the adsorber effluent gas into a gas storage tank;(b) terminating introduction of the pressurized feed gas into the adsorber vessel and depressurizing the adsorber vessel by evacuating gas from the feed end of the adsorber vessel;(c) continuing to evacuate gas from the feed end of the adsorber vessel while simultaneously introducing stored adsorber effluent gas from the gas storage tank into the product end of the adsorber vessel until the pressure in the adsorber vessel reaches a minimum adsorber pressure;(d) terminating the evacuating of gas from the feed end of the adsorber vessel and repressurizing the adsorber vessel from the minimum adsorber pressure to an intermediate pressure by introducing pressurized feed gas into the feed end of the adsorber vessel while continuing to introduce stored adsorber effluent gas from the gas storage tank into the product end of the adsorber vessel;(e) further repressurizing the adsorber vessel to the feed pressure by continuing to introduce pressurized feed gas into the feed end of the adsorber vessel; and(f) repeating steps (a) through (e) in a cyclic manner.