CONCENTRATION OF AQUEOUS SOLUTION

摘要

PURPOSE:To attain to conserve power, by introducing an aqueous solution to be conc. and gas forming a hydrate of combined water of heptahydrate or more into a hydration tank at 5 deg.C or less under pressure of 100kg/cm<2> or less to form a hydrate. CONSTITUTION:The aqueous solution cooled to 0 deg.C or less in a hydration tank 9 pressurized under pressure of 100kg/cm<2> or less at 5 deg.C or less is contacted with gas capable of forming a hydrate from a gas compressor 22, a booster 15 and a gas recycling machine 16 to precipitate the hydrate with the gas component while the hydrate is taken out to an air diffusion tank 11 by a liquid separator 10 through a rotary valve 20 and reduced in pressure and raised in temp. through the hydration tank 9 and the liquid separator 10 to be decomposed into water and gas. A temp. regulator 21 is provided to a washing line and a part of the liquid supplied to the liquid separator 10 through a supply pump 8 is introduced into the washing line to perform washing by fresh water.