| 摘要 |
The invention relates to a method for purifying synthesis gas in a pressure swing adsorption installation (9) which is desorbed with a vacuum that is generated via a so-called ejector (12) operated with vapor, said vapor being generated in a heat exchanger (6, 7) that uses the heat in the waste gas duct or in the useful gas duct for vapor generation. The pressure swing installation is advantageously operated alternating between adsorption at excessive pressure, pressure swing desorption and vacuum desorption and the gas desorbed by the ejector is cooled in a cooler (13) so that the vapor contained therein can be condensed and withdrawn or is advantageously returned to the starting gas for synthesis gas generation and the foreign gas (9b) desorbed from the pressure swing installation, which contains at least some not-consumed heating gas, is returned to the heating gas. In an advantageous embodiment, the vacuum from the ejector is stored in an intermediate reservoir (11) and is applied to the pressure swing adsorption unit when it is in the cycle of vacuum desorption. The invention also relates to a device for carrying out said method. |
