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A method of purifying water solutions obtained from ion exchanger regeneration and device for purifying water solutions obtained from ion exchanger regeneration.
A method of purifying water solutions obtained from ion exchanger regeneration and device for purifying water solutions obtained from ion exchanger regeneration.
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机译：一种纯化从离子交换剂再生获得的水溶液的方法和一种纯化从离子交换剂再生获得的水溶液的装置。
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摘要
1. The method of purifying water solutions obtained from ion exchanger regeneration consists in their separation by the method of membrane distillation into pure water and the concentrate. It is characterised in that the post-regeneration solution in a non-saturated state is heated up to the temperature, that does not exceed 333 K. The flow intensities along membrane surfaces are adjusted to ensure the temperature of the solution leaving the module is not lower than 326 K, while the temperature of water flowing on the other membrane side at the module inlet is at least 293 K. During the flow through the membrane module, the post-regeneration solution is condensed through the evaporation of water through the pores of the non-moistened hydrophobic membrane. Then, the evaporating water is condensed and collected on the other membrane side, while the condensed solution is crystallised at the temperature under 320 K. Then, the nuclei of crystallisation are removed from the solution and new portions of purified solution are added in the amount, which compensates the volume of the precipitated salt and the volume of evaporated water. Then, the solution undergoes concentration again. 3. The device for purifying water solutions obtained from ion exchanger regeneration by membrane distillation combined with salt crystallisation. It is characterised in that it has an additional circulation tank (4). The precipitate funnel of the latter is connected to the crystallizer (7). The outlet of the latter is connected to the precipitate funnel of the circulation tank (4). The top outlet of the tank (4) is connected to the outlet of the storage reservoir of post-regeneration solutions (1). The latter is connected through the heat exchanger (2) to the inlet of the feed into the section of membrane modules (3). The other inlet of the membrane section (3) is connected through the heat exchanger (6) to the condensate tank (5), connected to the outlet of the distillate circulation in the membrane section (3).
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