公开(公告)号：US11346603B2

公开(公告)日：2022-05-31

申请号：US16617141

申请日：2018-05-18

Applicant: L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude

Inventor： Kenji Hirose ,  Shinji Tomita

IPC: F25J3/00 ,  F25J3/04

Abstract: A gas production system that can supply liquefied gas obtained by rectifying source gas as product gas continuously with high heat efficiency without using a machine that has a risk of contamination like a pump. A gas production system includes a single pressure device having a single pressurized container to which liquefied gas extracted from a rectification unit is supplied, a pressure line for extracting and vaporizing a part of the liquefied gas in the pressurized container and returning the part of the liquefied gas to the pressurized container, and a second heat exchange unit that is disposed in the pressure line, and a liquefied gas storage unit that stores liquefied gas which is led out from the pressurized container.

公开(公告)号：US11150016B2

公开(公告)日：2021-10-19

申请号：US15956921

申请日：2018-04-19

Applicant: L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude

Inventor： Kenji Hirose ,  Hirofumi Utsunomiya ,  Daisuke Nagata ,  Yasuharu Nishi ,  Shinji Tomita

IPC: F25J3/04

Abstract: A nitrogen production system that can produce high purity nitrogen containing a desired concentration of oxygen and ultrahigh purity nitrogen containing a desired concentration of argon in a single rectifying column while restraining increase in electric power consumption and a production process thereof are provided. The method can include the steps of rectifying a cooled and compressed air stream in the rectifying column; withdrawing the ultrahigh purity nitrogen stream from a top portion of the nitrogen rectifying column, warming the ultrahigh purity nitrogen stream in a heat exchanger, and then recovering the ultrahigh purity nitrogen stream from the heat exchanger; and withdrawing a high purity nitrogen stream from a rectification section of the nitrogen rectifying column, warming the high purity nitrogen stream in the heat exchanger, and then recovering the high purity nitrogen stream from the heat exchanger.

公开(公告)号：US10036589B2

公开(公告)日：2018-07-31

申请号：US14655261

申请日：2013-12-16

Applicant: L'AIR LIQUIDE

Inventor： Kenji Hirose ,  Shinji Tomita

IPC: F25J1/00 ,  F25J1/02 ,  F25J3/04 ,  F01K25/08

CPC classification number: F25J1/0015 ,  F01K25/08 ,  F17C2221/033 ,  F17C2223/0161 ,  F17C2223/033 ,  F17C2225/0123 ,  F17C2225/035 ,  F17C2227/0316 ,  F17C2227/0323 ,  F17C2227/0393 ,  F17C2265/05 ,  F17C2270/0136 ,  F25J1/0012 ,  F25J1/002 ,  F25J1/004 ,  F25J1/0045 ,  F25J1/0222 ,  F25J1/0224 ,  F25J1/0264 ,  F25J1/0281 ,  F25J1/0285 ,  F25J1/0292 ,  F25J3/04412 ,  F25J2210/62

Abstract: An apparatus and a method for cooling and compressing a fluid to produce a low-temperature compressed fluid that can efficiently use the cold of LNG and reduce the energy needed, the apparatus using a Rankine cycle system having a first compression device, a first heat exchanger, an expansion device, a second heat exchanger, and a first flow passageway for guiding the heat transfer medium from the second heat exchanger to the first compression device; and at least one second compression device that is coupled to the expansion device, wherein at the second heat exchanger, a low-temperature LNG and the heat transfer medium undergo heat transfer, wherein at the first heat exchanger, a fed material gas and the heat transfer medium undergo heat transfer to produce a low-temperature fluid from the material gas, and the low-temperature fluid is compressed at the second compression device to produce a low-temperature compressed fluid.

公开(公告)号：US11549747B2

公开(公告)日：2023-01-10

申请号：US16840065

申请日：2020-04-03

Applicant: L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude

Inventor： Kenji Hirose ,  Shinji Tomita

IPC: F25J3/04

Abstract: A cryogenic air separation apparatus comprises: a heat exchanger, a first rectification column, a first condenser, a second rectification column, a third rectification column, a second condenser, a high-purity oxygen rectification column, a third condenser, a nitrogen compressor, and a compressed recycled gas line L52 for introducing product nitrogen gas compressed by the first nitrogen compressor into a warm end (heat source) of an ultra-high-purity oxygen vaporizer as a compressed recycled gas.

公开(公告)号：US20190293347A1

公开(公告)日：2019-09-26

申请号：US16359172

申请日：2019-03-20

Applicant: L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude

Inventor： Kenji HIROSE ,  Maxime Ranchoux ,  Shinji Tomita ,  Loic Joly

IPC: F25J3/04 ,  F25J3/02

Abstract: An apparatus for producing product nitrogen gas and product argon, comprising: a first rectification column into which raw air is introduced; a second rectification column from which product nitrogen gas is drawn; a third rectification column from which product argon gas is drawn; and a first condenser configured to perform heat exchange between a gas accumulated in a column top portion of the first rectification column, and a liquid accumulated in a column bottom portion of the second rectification column, wherein an intermediate portion gas containing nitrogen is drawn from an intermediate portion of the second rectification column and merged with a condenser gas drawn from the first condenser. The merged gases are expanded and cooled by means of an expansion turbine whereby the cold thereof is utilized.