METHOD AND APPARATUS FOR SEPARATING NITROGEN-RICH GAS

Title:

METHOD AND APPARATUS FOR SEPARATING NITROGEN-RICH GAS

Document Type and Number:

WIPO Patent Application WO/1995/003873

Kind Code:

A1

Abstract:

A method for separating nitrogen-rich gas by a pressure swing adsorption system using an apparatus comprising a plurality of adsorption tanks (1, 2), an equalizing tank (3) and a product storage tank (4), the method comprising the steps of: (a) allowing a predetermined amount of highly pure nitrogen gas from the equalizing tank (3) to flow to an outlet side of the adsorption tank (2) which is in a regenerating process; (b) establishing a communication between outlet sides of the two adsorption tanks (1, 2) with an equalizing pipeline while opening inlet sides of the two adsorption tanks (1, 2) under normal pressure; and (c) following the step (b), causing a certain amount of the highly pure nitrogen gas in the equalizing tank (3) to flow in a reverse direction via the outlet side of the adsorption tank (2) which is going to shift from the regenerating process to an adsorption one while supplying material gas via the inlet side thereof.

Inventors:

KAJI SHINICHI (JP)
HARUNA KAZUO (JP)

Application Number:

PCT/JP1994/001217

Publication Date:

February 09, 1995

Filing Date:

July 22, 1994

Export Citation:

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Assignee:

SUMITOMO SEIKA CHEMICALS (JP)
KAJI SHINICHI (JP)
HARUNA KAZUO (JP)

International Classes:

B01D53/04; B01D53/047; B01D53/053; C01B21/04; (IPC1-7): B01D53/047; C01B21/04

Foreign References:

JPH0377617A	1991-04-03
JPH0256126B2	1990-11-29
JPH0141085B2	1989-09-04
JPS60110318A	1985-06-15

Other References: