公开(公告)号：US20240353174A1

公开(公告)日：2024-10-24

申请号：US18635494

申请日：2024-04-15

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

发明人： Michael A. TURNEY ,  Alain GUILLARD

IPC分类号： F25J3/04

CPC分类号： F25J3/04787 ,  F25J3/04309 ,  F25J3/04321 ,  F25J3/04412 ,  F25J2210/40 ,  F25J2215/50 ,  F25J2270/02 ,  F25J2270/42 ,  F25J2270/50 ,  F25J2280/50

摘要： A method for production of at least two liquid oxygen product streams from an air separation unit, wherein, the oxygen streams are cooled by heat exchange from at least one gaseous stream comprising predominantly nitrogen from the distillation column, and wherein the product liquid oxygen streams are at different temperatures.

公开(公告)号：US12044471B2

公开(公告)日：2024-07-23

申请号：US17594096

申请日：2020-03-27

申请人： LINDE GMBH

发明人： Stefan Lochner ,  Ralph Spöri ,  Reinhold Hölzl ,  Axel Lehmacher ,  Alexander Woitalka ,  Sven Schauder

IPC分类号： F25J3/04 ,  F25J1/00 ,  F25J1/02

CPC分类号： F25J3/04787 ,  F25J1/0012 ,  F25J1/0015 ,  F25J1/0037 ,  F25J1/004 ,  F25J1/0045 ,  F25J1/0202 ,  F25J1/0248 ,  F25J1/0251 ,  F25J3/0409 ,  F25J3/04296 ,  F25J3/04412 ,  F25J3/04721 ,  F25J2270/06 ,  F25J2280/20 ,  Y02E60/14

摘要： A method for operating a heat exchanger, in which a first operating mode is carried out in first time periods, and a second operating mode is carried out in second time periods that alternate with the first time periods; in the first operating mode a first fluid flow is formed at a first temperature, is fed into the heat exchanger in a first region at the first temperature, and is partially or completely cooled in the heat exchanger; in the first operating mode a second fluid flow is formed at a second temperature, is fed into the heat exchanger in a second region at the second temperature, and is partially or completely heated in the heat exchanger; and in the second operating mode the feeding of the first fluid flow and of the second fluid flow into the heat exchanger is partially or completely halted.

公开(公告)号：US20240003620A1

公开(公告)日：2024-01-04

申请号：US18253513

申请日：2021-11-22

申请人： Linde GmbH

发明人： Dimitri GOLUBEV

IPC分类号： F25J3/04

CPC分类号： F25J3/04296 ,  F25J3/04084 ,  F25J3/0409 ,  F25J3/04393 ,  F25J3/04412 ,  F25J2200/06 ,  F25J3/042 ,  F25J3/04175 ,  F25J3/04678 ,  F25J3/04727 ,  F25J3/04812

摘要： A process for cryogenic separation of air using an air separation plant configured as a high air pressure air separation plant is provided, wherein of the air initially compressed several partial air streams are formed which are at least in part further compressed, cooled in a main heat exchanger and expanded before being introduced into the column system. The partial air streams include a first partial air stream and a second partial air stream whose air is compressed in parallel in a first warm booster and a second warm booster and thereafter expanded in a first expander and a second expander mechanically coupled to the first booster and to the second booster, respectively. A corresponding air separation plant is also part of the present invention.

公开(公告)号：US11674750B2

公开(公告)日：2023-06-13

申请号：US17234080

申请日：2021-04-19

申请人： Hanfei Tuo ,  Zhengrong Xu

发明人： Hanfei Tuo ,  Zhengrong Xu

IPC分类号： F25J3/04 ,  F25J3/02 ,  F25J1/00

CPC分类号： F25J3/04412 ,  F25J3/0257 ,  F25J3/04012 ,  F25J3/04763 ,  F25J1/0012 ,  F25J2200/50 ,  F25J2210/40 ,  F25J2250/20

摘要： Enhancements to a dual column, nitrogen producing cryogenic air separation unit are provided. Such enhancements include an improved air separation cycle that uses multiple condenser-reboilers and recycles a portion of the vapor from one or more of the condenser-reboilers to the incoming feed stream and or the compressed purified air streams to yield improvements in such dual column, nitrogen producing cryogenic air separation units. The multiple condenser-reboilers preferably include an integrated condenser-reboiler arrangement comprising a heat exchanger having a set of nitrogen condensing passages, a first set and second set of boiling passages, and a phase separator.

公开(公告)号：US20180292130A1

公开(公告)日：2018-10-11

申请号：US16009635

申请日：2018-06-15

申请人： Neil M. Prosser ,  Yang Luo

发明人： Neil M. Prosser ,  Yang Luo

IPC分类号： F25J3/04 ,  B01D53/047

CPC分类号： F25J3/04412 ,  B01D3/141 ,  B01D53/047 ,  B01D2256/18 ,  B01D2257/102 ,  B01D2257/104 ,  F25J3/0409 ,  F25J3/04096 ,  F25J3/04103 ,  F25J3/04296 ,  F25J3/04303 ,  F25J3/04678 ,  F25J3/04733 ,  F25J3/04739 ,  F25J3/04884 ,  F25J3/04939 ,  F25J2200/80 ,  F25J2205/02 ,  F25J2205/60 ,  F25J2245/58 ,  F25J2250/02 ,  F25J2270/02 ,  F25J2290/34

摘要： A method and apparatus for argon recovery in which an impure argon stream is separated from air within a cryogenic air separation unit having an argon rejection column and a reflux type argon condenser disposed internally within the lower pressure column. An impure argon stream is subsequently recovered from the argon rejection column and purified within an integrated adsorbent based argon refining and purification subsystem to produce product grade argon. The waste stream from the adsorbent based argon refining and purification subsystem is recycled back to the argon rejection column so as to improve the argon recovery.

公开(公告)号：US20180292129A1

公开(公告)日：2018-10-11

申请号：US16003447

申请日：2018-06-08

申请人： Guang X. Chen ,  Steven C. Brown ,  John P. Ricotta

发明人： Guang X. Chen ,  Steven C. Brown ,  John P. Ricotta

IPC分类号： F25J3/04 ,  B01D3/14 ,  B01D3/22 ,  B01D3/16

CPC分类号： F25J3/04412 ,  B01D3/14 ,  B01D3/16 ,  B01D3/20 ,  B01D3/22 ,  B01D3/225 ,  F25J3/04903

摘要： A multiple pass, parallel flow downcomer tray for a mass transfer column and method for liquid-vapor contacting in a mass transfer column is provided. The multiple pass, parallel flow downcomer tray has at least four mass transfer decks configured to provide contact between an ascending vapor passing upward through apertures on the tray surface and a traversing liquid on the tray surface. The tray further includes a central downcomers disposed near a central axis of the tray and two or more peripheral downcomers disposed near the edge of the tray and spaced apart from the central axis, wherein at least two of the four mass transfer decks are configured to discharge the traversing liquid into the peripheral downcomers and two of the four mass transfer decks are configured to discharge the traversing liquid into the central downcomer.

公开(公告)号：US10060673B2

公开(公告)日：2018-08-28

申请号：US14754786

申请日：2015-06-30

申请人： Steven R. Falta ,  Brian S. Powell ,  Henry E. Howard ,  Vijayaraghavan S. Chakravarthy

发明人： Steven R. Falta ,  Brian S. Powell ,  Henry E. Howard ,  Vijayaraghavan S. Chakravarthy

IPC分类号： F25J3/04

CPC分类号： F25J3/04672 ,  F25J3/0285 ,  F25J3/04412 ,  F25J3/04678 ,  F25J3/04715 ,  F25J3/048 ,  F25J3/04848 ,  F25J2250/02 ,  F25J2250/20

摘要： An argon reflux condensation system and method in which a plurality of once-through heat exchangers are connected to an argon column of an air separation plant to condense argon-rich vapor streams for production of reflux to the argon column. Condensation of the argon-rich vapor streams is brought about through indirect heat exchange with crude liquid oxygen streams that partially vaporize and are introduced into a lower pressure column of the plant for further refinement. The flow rate of the crude liquid oxygen streams are sensed and controlled at locations in the plant where the crude liquid oxygen is in a liquid state and in proportion to the size of the once-through heat exchangers. Feed stream flow rate to the argon column is controlled in response to air flow rate to the plant and product flow rate is controlled in response to the feed stream flow rate to the argon column.

公开(公告)号：US20180180357A1

公开(公告)日：2018-06-28

申请号：US15847990

申请日：2017-12-20

申请人： Dimitri Golubev

发明人： Dimitri Golubev

IPC分类号： F25J3/04

CPC分类号： F25J3/04084 ,  F17C2223/0161 ,  F17C2223/033 ,  F25J3/04024 ,  F25J3/0409 ,  F25J3/04133 ,  F25J3/04157 ,  F25J3/04181 ,  F25J3/04218 ,  F25J3/04296 ,  F25J3/04303 ,  F25J3/04309 ,  F25J3/04315 ,  F25J3/04387 ,  F25J3/04393 ,  F25J3/04412 ,  F25J3/04678 ,  F25J3/04927 ,  F25J2200/94 ,  F25J2205/04 ,  F25J2205/32 ,  F25J2205/34 ,  F25J2215/40 ,  F25J2215/52 ,  F25J2215/54 ,  F25J2240/10 ,  F25J2240/12 ,  F25J2240/42 ,  F25J2240/46 ,  F25J2245/50 ,  F25J2245/58

摘要： A process and air separation plant for producing one or more air products by cryogenic separation of air in an air separation plant wherein a first fraction and a second fraction of feed air quantity are post-compressed in a post-compressor from a first pressure level to a second pressure level at least 3 bar above the first pressure level, and are extracted from a post-compressor jointly at the second pressure level, impure nitrogen, the nitrogen content of which lies below an overhead product of a high-pressure column, is extracted from the high-pressure column at the first pressure level and is expanded using a second turboexpander which is mechanically coupled to a first booster, and a fluid enriched with argon is extracted from a low-pressure column, is depleted of argon and is recycled into the low-pressure column.

公开(公告)号：US09964353B2

公开(公告)日：2018-05-08

申请号：US15059708

申请日：2016-03-03

申请人： Tobias Lautenschlager ,  Stefan Lochner

发明人： Tobias Lautenschlager ,  Stefan Lochner

IPC分类号： F25J3/00 ,  F25J3/04

CPC分类号： F25J3/04412 ,  F25J3/04084 ,  F25J3/0409 ,  F25J3/0429 ,  F25J3/04296 ,  F25J3/04387 ,  F25J3/04393 ,  F25J3/04448 ,  F25J3/04648 ,  F25J3/04654 ,  F25J3/0466 ,  F25J3/04666 ,  F25J3/04678 ,  F25J3/04872 ,  F25J3/04878 ,  F25J3/04884 ,  F25J2200/32 ,  F25J2205/30 ,  F25J2240/10 ,  F25J2245/58

摘要： A system and method serve generate oxygen by low-temperature air separation in a distillation column system having a high-pressure column and a low-pressure column, a main condenser which is constructed as a condenser-evaporator, and an auxiliary column. A gaseous oxygen-containing fraction is introduced into the auxiliary column. A nitrogen-containing liquid stream from the high-pressure column, the main condenser or the low-pressure column is applied as reflux to the top of the auxiliary column. An argon-rich stream from an intermediate site of the low-pressure column is introduced into an argon removal column that has an argon removal column top condenser. The low-pressure column is arranged beside the high-pressure column, the main condenser is arranged over the high-pressure column, the auxiliary column is arranged over the main condenser, the argon removal column is arranged over the auxiliary column and the argon removal column top condenser is arranged over the argon removal column.

公开(公告)号：US20180038645A1

公开(公告)日：2018-02-08

申请号：US15556364

申请日：2016-03-10

申请人： LINDE AKTIENGESELLSCHAFT

发明人： Stefan Lochner ,  Thomas Nohlen ,  Lars Kirchner ,  Dimitri Goluben

IPC分类号： F25J3/04

CPC分类号： F25J3/04715 ,  F25J3/04084 ,  F25J3/0409 ,  F25J3/04157 ,  F25J3/04181 ,  F25J3/04296 ,  F25J3/04303 ,  F25J3/04393 ,  F25J3/04412 ,  F25J3/04448 ,  F25J3/04678 ,  F25J3/04709 ,  F25J3/04872 ,  F25J3/04878 ,  F25J3/04896 ,  F25J3/04909 ,  F25J3/04939 ,  F25J2200/06 ,  F25J2200/08 ,  F25J2200/32 ,  F25J2200/78 ,  F25J2205/30 ,  F25J2235/50 ,  F25J2245/50 ,  F25J2245/58 ,  F25J2250/02 ,  F25J2250/10 ,  F25J2290/12

摘要： The plant is used for producing oxygen by cryogenic air separation. The plant has a high-pressure column, a low-pressure column and a main condenser. An argon-elimination column is in fluid connection with an intermediate point of the low-pressure column and is connected to an argon-elimination column head condenser. An auxiliary column has a sump region, into which gas is introduced from the argon-elimination column head condenser. The head of the auxiliary column is connected to a return flow liquid line, in order to introduce a liquid stream from the high-pressure column or the head condenser. The liquid stream has an oxygen content which is at least equal to that of air. At least one part of the crude liquid oxygen from the sump of the high-pressure column is fed to the auxiliary column at a first intermediate point.