L'air Liquide, Societe Anonyme a Directoire Et Conseil De Surveillance Pour L'etude Et L'exploitation Des Procedes Georges Claude

L'air Liquide, Société Anonyme Á Directoire Et Conseil De Surveillance Our L'etude Et L'exploitation Des Procédés Georges Claude

L'air Liquide, Soci&#xe9;t&#xe9; Anonyme Pour L'etude Et L'exploitation Des Proc&#xe9;d&#xe9;s Georges Claude

Frédéric Staine

Alain Briglia

Patrick Le Bot

Jean-Pierre Gourbier

Emmanuel Garnier

Lasad Jaouani

Frédéric Judas

Daniel Gourdain

Frederic Judas

Ingrid Berthaume

Mathieu Leaute

Bénédicte Dos Santos

The invention relates to a method for the provision of gas under pressure, by vaporisation of a cryogenic liquid from at least two cryogenic separation devices (A, B, C, D). Each device comprises a heat exchanger () and a system of columns (). In a first mode of operation, a cryogenic liquid is withdrawn from the columns in each cryogenic separation device, at least a part of which is pressurised () to give a pressurised cryogenic liquid () and at least a part of the cryogenic liquid under pressure is vaporised in the heat exchanger () to give a part of gas under pressure (). A cryogenic liquid is sent () from the cryogenic separation device to a common store () and at least one liquid (A,B,C,D) coming from the store is vaporised in the exchange line () in at least one of the cryogenic separation devices.

Method and installation for the provision of gas under pressure

A process and an apparatus for separating air by cryogenic distillation. The apparatus has a medium pressure column thermally coupled to a low pressure column. Compressed and purified air is cooled to cryogenic temperature in an exchanger, and sent at least partly to the medium pressure column. Streams enriched in oxygen and nitrogen are sent from the medium pressure column to the low pressure column and, streams enriched in nitrogen and oxygen are removed from the low pressure.

Process for separating air by cryogenic distillation and installation for implementing this process

A method and apparatus for separating air by cryogenic distillation. The energy of an air separation installation is increased by reducing the size of the exchangers, and therefore increasing the head losses and the temperature differences in the exchange line, and increasing the temperature difference at the main vaporizer. The size of the distillation column is reduced by minimizing the number of theoretical trays and the number of sections of packing or trays. The size of the refrigerating turbine is also reduced by increasing its intake temperature in order to reduce the output.

Method for separating air by cryogenic distillation and installation therefor

Growing community of inventors

Le Plessis Trevise, France

Frédéric Staine