METHOD AND APPARATUS FOR OBTAINING PURE WATER AND PRODUCTS DISSOLVED IN WATER

摘要

For obtaining pure water and products dissolved in water, the water is introduced in fine distribution into an inert carrier gas stream, a predetermined partial pressure for the carrier gas being set in the carrier gas/steam mixture, which forms as a result of heating of the carrier gas/steam mixture until the steam thus generated is superheated. The solid particles are precipitated from the carrier gas/steam mixture. The purified carrier gas/steam mixture is cooled until the steam condenses, and the heat thus released is utilised within the process. For heating the carrier gas/steam mixture, the water to be purified is first partially vaporised by supplying heat and the brine formed in the partial vaporisation is introduced into the carrier gas stream. The steam formed in the partial vaporisation is at least partially compressed, after the brine has been separated off, and is used with heat release, on the one hand, for heating the carrier gas stream after feeding of the brine for adjusting the superheated carrier gas/steam mixture and, on the other hand, for partial vaporisation of the water. The purified carrier gas/steam mixture is utilised, with a condensation of the steam contained therein, for preheating the water which is to be purified.