Method for starting an air separation apparatus by cryogenic distillation
The method addresses the challenge of unstable start-up in air separation apparatus by initiating with the air compressor and controlled liquid nitrogen injection, achieving stable operation and preventing failure through sequential pressure and concentration management.
FR3164276B1Active Publication Date: 2026-06-26LAIR LIQUIDE SA POUR LETUDE & LEXPLOITATION DES PROCEDES GEORGES CLAUDE
Patent Information
- Authority / Receiving Office
- FR · FR
- Patent Type
- Patents
- Current Assignee / Owner
- LAIR LIQUIDE SA POUR LETUDE & LEXPLOITATION DES PROCEDES GEORGES CLAUDE
- Filing Date
- 2024-07-04
- Publication Date
- 2026-06-26
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Abstract
Title of the invention: Method for starting an air separation apparatus by cryogenic distillation. In a method for starting an air separation apparatus by cryogenic distillation, the apparatus comprises a first column (3) operating at a first pressure and a second column (5) operating at a second pressure lower than the first pressure. The second column has a tank vaporizer (4) connected to be heated by a nitrogen-enriched gas from the first column, and means for delivering an oxygen-enriched fluid to the tank of the second column, connected to a heat exchanger (6) to ensure the heating of the oxygen-enriched fluid. To start the apparatus, air is sent to the first or second column, and then liquid nitrogen is sent below the vaporizer from an external source (1). Abstract figure: Figure 1
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