PRESSURE-SWING-ADSORPTION GAS PRODUCING APPARATUS

Title:

PRESSURE-SWING-ADSORPTION GAS PRODUCING APPARATUS

Document Type and Number:

WIPO Patent Application WO/2017/169688

Kind Code:

A1

Abstract:

Provided is a pressure-swing-adsorption gas producing apparatus that can satisfactorily perform an adsorption tower desorption step. An off-gas tank T that stores an off-gas and a pressure-boosting unit 10 that boosts the pressure of the off-gas and feeds the off-gas to a membrane separation unit 9, which has a separation membrane 9A through which a miscellaneous gas passes quickly relative to a gas being purified, are provided to the upstream side of the membrane separation unit 9 in an off-gas exhaust path 4 connected to multiple adsorption towers 1. A recycle gas return path 11 that returns a recycle gas that does not pass through the separation membrane 9A to a feedstock gas supply path 3 is provided. An operation control unit is configured such that an off-gas modulator MR is modulated such that the off-gas exhaust flow-rate is a flow-rate at which the off-gas amount exhausted from an adsorption tower 1 during each desorption step is equal to the off-gas amount exhausted from the off-gas tank T between the start of a desorption step at an adsorption tower 1 and the start of a desorption step at a separate adsorption tower 1.

Inventors:

TANAKA HIROSHI (JP)
YOKOYAMA KOTA (JP)

Application Number:

PCT/JP2017/009954

Publication Date:

October 05, 2017

Filing Date:

March 13, 2017

Export Citation:

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Assignee:

OSAKA GAS CO LTD (JP)

International Classes:

B01D53/047; B01D53/22; C07C7/12; C07C7/144; C07C9/04

Domestic Patent References:

WO2014104196A1

2014-07-03

Foreign References:

JPS5651223A	1981-05-08
JP2008247632A	2008-10-16
JPS6447421A	1989-02-21
US5753010A	1998-05-19
JPS6391119A	1988-04-21
JPH0312212A	1991-01-21

Other References: