公开(公告)号：US20220282914A1

公开(公告)日：2022-09-08

申请号：US17630433

申请日：2019-07-26

申请人： Alain BRIGLIA ,  Fengjie XUE ,  Jianwei CAO ,  Baptiste FARA ,  L'Air Liquide, Societe Anonyme pour l'Etude et l?Exploitation des Procedes Georges Claude

发明人： Alain BRIGLIA ,  Fengjie XUE ,  Jianwei CAO ,  Baptiste FARA

IPC分类号： F25J3/04

摘要： An apparatus for the separation of air by cryogenic distillation comprises a column system, a heat exchanger, a turbine, means for sending compressed and purified air at a first pressure to be cooled at the first pressure in the heat exchanger, means for sending a first gaseous stream 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 to be warmed and vaporized in the heat exchanger to a first intermediate temperature of the heat exchanger to form a vaporized stream, means for removing the vaporized stream from an intermediate section of the heat exchanger, a conduit for sending the vaporized stream to be expanded, in the turbine 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 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.

公开(公告)号：US20220128301A1

公开(公告)日：2022-04-28

申请号：US17500877

申请日：2021-10-13

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

发明人： Jianwei CAO ,  Lin XU ,  Eric DAY ,  Baptiste FARA

IPC分类号： F25J3/04

摘要： A method and apparatus for producing a high-pressure gas from an air separation unit is provided, in which the method includes the steps of introducing a cold air feed into a distillation column system under conditions effective for separating the cold air feed into a first air gas and a second air gas; withdrawing the first and second air gases from the distillation column system and warming said first and second air gases in a main heat exchanger, wherein the first air gas is withdrawn from the distillation column system at a medium pressure; splitting the first air gas into a first fraction and a second fraction; expanding the first fraction in a turbine; and compressing the second fraction in a booster to a pressure that is higher than the medium pressure, wherein the booster is powered by the turbine