公开(公告)号：US12061045B2

公开(公告)日：2024-08-13

申请号：US17415688

申请日：2018-12-19

申请人： L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude ,  Eric Day ,  Fei Gao ,  Huali Xie

发明人： Eric Day ,  Fei Gao ,  Huali Xie

IPC分类号： F25J3/04

CPC分类号： F25J3/04818 ,  F25J3/04054 ,  F25J3/04296 ,  F25J3/04393 ,  F25J3/04412 ,  F25J3/04781 ,  F25J2230/08 ,  F25J2230/40 ,  F25J2240/04 ,  F25J2240/10 ,  F25J2245/40

摘要： In a process for starting up an air separation unit, which is at a temperature of above 0° C., the air separation unit comprising a main air compressor for compressing the feed air, a booster driven by a turbine and a venting conduit connected downstream of the booster and upstream of the main heat exchanger wherein in order to start up the air separation unit, once the turbine is operating at said given speed, the venting conduit is opened to send at least part of the air compressed in the booster from the booster outlet to the atmosphere.

公开(公告)号：US11709018B2

公开(公告)日：2023-07-25

申请号：US16958037

申请日：2017-12-25

申请人： Alain Briglia ,  Remy Kurtz ,  Eric Day ,  Huali Xie ,  Baptiste Fara ,  L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude

发明人： Alain Briglia ,  Remy Kurtz ,  Eric Day ,  Huali Xie ,  Baptiste Fara

IPC分类号： F25J3/02 ,  F25J3/04

CPC分类号： F25J3/0409 ,  F25J3/04206 ,  F25J3/04303 ,  F25J3/04412 ,  F25J2250/40 ,  F25J2250/50

摘要： A cryogenic air separation setup in a cold box, wherein gaseous oxygen under elevated pressure is produced through hydraulic force caused by the geodetic distance between where liquid oxygen is drawn from the distillation column and where liquid oxygen is vaporized to form gaseous oxygen, such as in an auxiliary evaporator. To increase the vertical distance between the above-mentioned two location, the components are arranged directly below one another in the following sequence: the lower-pressure column, the main condenser evaporator, the higher-pressure column, the subcooler, the main heat exchanger and the auxiliary evaporator). In particular, the main heat-exchanger is positioned with the cold-end on the top to optimize piping expenditure.

公开(公告)号：US11988446B2

公开(公告)日：2024-05-21

申请号：US17469823

申请日：2021-09-08

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

发明人： Alain Briglia ,  Huali Xie ,  Yongshun Zhang

IPC分类号： F25J3/04

CPC分类号： F25J3/04448 ,  F25J3/04084 ,  F25J3/0409 ,  F25J3/0423 ,  F25J3/04436 ,  F25J3/04454 ,  F25J2200/08 ,  F25J2210/40 ,  F25J2215/42 ,  F25J2215/50 ,  F25J2235/02 ,  F25J2235/42 ,  F25J2235/50

摘要： A method and apparatus for producing high-purity nitrogen and low-purity oxygen using three-column rectification are provided, in which: nitrogen and oxygen undergo rectification in different columns, with high-purity nitrogen and low-purity oxygen being separated out of air simultaneously, thereby overcoming the shortcomings of conventional low-purity oxygen production equipment, and also reducing equipment investment, lowering energy consumption, increasing product added value, and realizing a circular economy effect.