| 摘要 |
The process comprises vacuuming a carbon dioxide vacuum swing adsorption unit (VSA) (4) having an adsorber subjected to a pressure cycle using a vacuum pump (9), and repressurizing the adsorber and/or vacuum pump by an external gas for creating an inflammable mixture at a pressure equal or greater than the atmospheric pressure. The repressurization step gas takes place in less than one second. The external gas is stored gas mixture, a gas obtained from a depressurization step and pressure cycle, stored and clean gas and/or nitrogen. The process comprises vacuuming a carbon dioxide vacuum swing adsorption unit (VSA) (4) having an adsorber subjected to a pressure cycle using a vacuum pump (9), and repressurizing the adsorber and/or vacuum pump by an external gas for creating an inflammable mixture at a pressure equal or greater than the atmospheric pressure. The repressurization step gas takes place in less than one second. The external gas is stored gas mixture, a gas obtained from a depressurization step and pressure cycle, stored and clean gas and/or nitrogen. The adsorber of the VSA is repressurized, after stopping the unit, using a first volume of the gas, where the volume is stored in a gasometer placed at discharge of vacuum pump. The gasometer contains a safety volume equal to the first gas volume. The repressurization of the adsorber and/or the vacuum pump by the safety volume is activated manually or automatically at each risk of air inlet. |
