Method and installation for the provision of gas under pressure

US7444834B2 · kind B2 · utility

Assignee

• L'Air Liquide, Société Anonyme à Directoire et Conseil de Surveillance pour l'Étude et l'Exploitation des Procédés Georges Claude · FR

Inventors

• Emmanuel Garnier · Paris, FR
• Frederic Staine · Le Plessis-Trévise, FR

Key dates

• Filing date: Mar 12, 2004
• Grant date: Nov 4, 2008
• Expiry date: Mar 9, 2025

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02E60/32
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

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 (1) and a system of columns (2, 3). In a first mode of operation, a cryogenic liquid is withdrawn from the columns in each cryogenic separation device, at least a part of which is pressurised (7, 8) to give a pressurised cryogenic liquid (9) and at least a part of the cryogenic liquid under pressure is vaporised in the heat exchanger (1) to give a part of gas under pressure (10). A cryogenic liquid is sent (6) from the cryogenic separation device to a common store (12) and at least one liquid (28A, 28B, 28C, 28D) coming from the store is vaporised in the exchange line (1) in at least one of the cryogenic separation devices.