METHOD AND APPARATUS FOR SEPARATING COMPONENT HAVING MEDIUM FILTERABILITY FROM GASEOUS MIXTURE

摘要

PURPOSE: To economically separate a component having intermediate permeability by passing a gaseous mixture through the inlet space of a permeator, removing the component having the intermediate permeability from the balance from the permeator and injecting the gaseous stream into the production space of the permeator. CONSTITUTION: The gaseous mixture consisting of, for example, H2 , CO and CO2 , is passed through the inlet space 1A of the permeator 1 under a high pressure and, for example, H2 is permeated through the production space 1B during the passage. The remaining gases (e.g. CO and CO2 ) of the permeation are sent to the space 2A and are subjected to the second permeation and, for example, the CO2 is passed through the space 2B. The remaining gas of the second permeation composed of the CO included in the initial mixture is expanded by a valve 5 and is sent to the space 1B. The CO is, thereupon, mixed with the H2 from the first permeation and is supplied as the H2 and CO mixture via a conduit 7 under middle pressure. The operation is made possible sufficiently if the partial pressure of the H2 is lower in the final mixture than the pressure in the initial mixture.