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Title:
CRYOGENIC DISTILLATION METHOD AND APPARATUS FOR PRODUCING PRESSURIZED AIR BY MEANS OF EXPANDER BOOSTER IN LINKAGE WITH NITROGEN EXPANDER FOR BRAKING
Document Type and Number:
WIPO Patent Application WO/2019/104524
Kind Code:
A1
Abstract:
Provided are a method and apparatus for producing nitrogen and oxygen by means of cryogenic distillation of air. Nitrogen products are extracted only from the top of a tower (11). If a customer needs nitrogen with lower pressure, part of pure nitrogen (124) which is partially located at a first nitrogen product pressure is reheated in a main heat exchanger (1), then decompressed to a second nitrogen product pressure by means of a nitrogen expander (23), further reheated by means of the main heat exchanger (1), and output as a low-pressure nitrogen product. The nitrogen expander (23) can be braked by an expander booster (24) for compressing air. By means of the method, nitrogen with different pressures can be suitably produced, and moreover, the energy consumption for producing the pressurized air can be reduced by utilizing the expansion work of nitrogen.

Inventors:
ZHAO, Bowei (Floor 23, Tower 1 DELIXI Building, No. 28 Xueyuan Road, West Lake Distric, Hangzhou Zhejiang 2, 310012, CN)
BRIGLIA, Alain (Floor 23, Tower 1 DELIXI Building, No. 28 Xueyuan Road, West Lake Distric, Hangzhou Zhejiang 2, 310012, CN)
XUE, Fengjie (Floor 23, Tower 1 DELIXI Building, No. 28 Xueyuan Road, West Lake Distric, Hangzhou Zhejiang 2, 310012, CN)
DAY, Eric (Floor 23, Tower 1 DELIXI Building, No. 28 Xueyuan Road, West Lake Distric, Hangzhou Zhejiang 2, 310012, CN)
Application Number:
CN2017/113525
Publication Date:
June 06, 2019
Filing Date:
November 29, 2017
Export Citation:
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Assignee:
L'AIR LIQUIDE, SOCIETE ANONYME POUR L'ETUDE ET L'EXPLOITATION DES PROCEDES GEORGES CLAUDE (75 Quai d'Orsay F- Paris, 75007, 75007, FR)
ZHAO, Bowei (Floor 23, Tower 1 DELIXI Building, No. 28 Xueyuan Road, West Lake Distric, Hangzhou Zhejiang 2, 310012, CN)
BRIGLIA, Alain (Floor 23, Tower 1 DELIXI Building, No. 28 Xueyuan Road, West Lake Distric, Hangzhou Zhejiang 2, 310012, CN)
XUE, Fengjie (Floor 23, Tower 1 DELIXI Building, No. 28 Xueyuan Road, West Lake Distric, Hangzhou Zhejiang 2, 310012, CN)
DAY, Eric (Floor 23, Tower 1 DELIXI Building, No. 28 Xueyuan Road, West Lake Distric, Hangzhou Zhejiang 2, 310012, CN)
International Classes:
F25J3/04
Foreign References:
CN201265997Y2009-07-01
CN103776240B2016-07-06
CN201281522Y2009-07-29
CN1910419A2007-02-07
CN102706101A2012-10-03
US5966967A1999-10-19
US4732595A1988-03-22
Attorney, Agent or Firm:
SUNSHINEIP INTELLECTUAL PROPERTY LAW FIRM (Room 2103, Jiaxing Building No. 877, Dongfang Road, Pudong New Area, Shanghai 2, 200122, CN)
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