| 摘要 |
In the process for the desalination of salt-containing aqueous solutions, a mixed-bed filter, with at least one upstream cation exchanger resin filter and at least one upstream anion exchanger resin filter, is used. The mixed-bed filter is operated as a working filter in the same way as the cation and anion exchanger resin filters. The regenerant solutions used for regenerating the ion exchanger resins of the mixed-bed filter are subsequently used for the regeneration of the ion exchanger resins of the upstream cation and anion exchanger resin filters. An apparatus suitable for carrying out this process has a device for simultaneously taking off the regenerant solutions used for regenerating the ion exchanger resins of the mixed-bed filter. In this device, two horizontally extending liquid discharge systems (1, 2) are arranged above and below the separation surface (4) between the ion exchanger resins (5, 6) separated by hydraulic means. Thus, the regenerant solution for the upper ion exchanger resin layer (5) and the regenerant solution for the lower ion exchanger resin (6) can be taken off separately through the upper liquid discharge system (1) and through the lower liquid discharge system (2) respectively. Between the two liquid discharge systems (1, 2), a horizontally extending liquid inlet system (3) is preferably provided. <IMAGE> |
