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Title:
METHANE CONCENTRATION METHOD AND METHANE CONCENTRATION DEVICE OF BIOGAS
Document Type and Number:
Japanese Patent JP2013095727
Kind Code:
A
Abstract:

To highly concentrate methane from a biogas and to further effectively utilize methane included in the biogas.

The biogas is pressurized and supplied to a first stage separation membrane module 1 via a supply tube 4 and a first compressor 5, a transmitted gas transmitted through the module 1 and containing carbon dioxide much is compressed by a second compressor 9 via a transmission gas tube 7 and cooled by a cooler 10 to liquefy and recover carbon dioxide and residual transmitted gas supplied to a gas engine 26 to be utilized. A non-transmitted gas which is not transmitted through the first stage separation membrane module 1 and contains methane much is supplied to a second stage separation membrane module 2 by residual pressure via a non-transmission gas tube 8 and a transmitted gas transmitted through the module 2 and containing carbon dioxide much is recycled to the first stage separation membrane module 1 via a recycle tube 11 and the supply tube 4 and a non-transmitted gas which is not transmitted through the second stage separation membrane module 2 and contains methane much is recovered as a methane concentrated gas in a recovering tube 12.


Inventors:
NAGAI TSUNEKI
MIZUNO SHIHO
MORIOKI MASAKATSU
UMEDA YOSHITO
Application Number:
JP2011241758A
Publication Date:
May 20, 2013
Filing Date:
November 03, 2011
Export Citation:
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Assignee:
TOHO GAS KK
International Classes:
C07C7/144; B01D53/00; B01D53/22; C07C9/04
Domestic Patent References:
JP2007254572A2007-10-04
JP2001294873A2001-10-23
JP2011153245A2011-08-11
JP2007018907A2007-01-25
Foreign References:
WO2010021053A12010-02-25
Attorney, Agent or Firm:
Patent Business Corporation Cosmos Patent Office