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Title:
PROCESS AND APPARATUS FOR THE SEPARATION OF AIR BY CRYOGENIC DISTILLATION
Document Type and Number:
WIPO Patent Application WO/2021/016756
Kind Code:
A1
Abstract:
An apparatus for the separation of air by cryogenic distillation comprises a column system (31, 33), a heat exchanger (4), a turbine (6), means for sending compressed and purified air (11) at a first pressure to be cooled at the first pressure in the heat exchanger (4), means for sending a first gaseous stream (16) having a nitrogen content at least that of air to be cooled and liquefied or pseudo liquefied in the heat exchanger to form a liquefied stream, means for sending at least part of the liquefied stream (10) to be warmed and vaporized in the heat exchanger to a first intermediate temperature of the heat exchanger to form a vaporised stream, means for removing the vaporised stream from an intermediate section of the heat exchanger, a conduit for sending the vaporised stream to be expanded, in the turbine (6) to form an expanded stream, a conduit for sending at least part of the expanded stream to the column system, a conduit for sending a second gaseous stream (15) having the same nitrogen content as the first stream to be cooled in the heat exchanger, means for removing at least part of the second gaseous stream from an intermediate section of the heat exchanger at a second intermediate temperature and sending the second gaseous stream to the turbine to be expanded with the vaporized stream

Inventors:
BRIGLIA ALAIN (CN)
XUE FENGJIE (CN)
CAO JIANWEI (CN)
FARA BAPTISTE (FR)
Application Number:
PCT/CN2019/097997
Publication Date:
February 04, 2021
Filing Date:
July 26, 2019
Export Citation:
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Assignee:
AIR LIQUIDE (FR)
BRIGLIA ALAIN (CN)
XUE FENGJIE (CN)
CAO JIANWEI (CN)
FARA BAPTISTE (FR)
International Classes:
F25J3/04
Foreign References:
CN1208847A1999-02-24
CN109442867A2019-03-08
CN107940896A2018-04-20
CN108759308A2018-11-06
CN208443098U2019-01-29
CN109737690A2019-05-10
GB2385807A2003-09-03
DE3307181A11984-09-06
FR3072451A12019-04-19
Attorney, Agent or Firm:
ZHONGZI LAW OFFICE (CN)
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