| 摘要 |
PCT No. PCT/FI89/00185 Sec. 371 Date Mar. 15, 1991 Sec. 102(e) Date Mar. 15, 1991 PCT Filed Sep. 27, 1989 PCT Pub. No. WO90/03208 PCT Pub. Date Apr. 5, 1990.A method of freezing and separation for concentrating solutions, such as waste waters of the process industry, by means of waste heat of the same process, by freezing the solution in a crystallizer operating at the triple point, by transferring the ice crystals produced thereby into a melter, by absorbing the cold vapor generated in the crystallizer into an absorber of a first absorption heat pump, said absorber being cooled by cooling water, by evaporating a corresponding amount of vapor in a generator of the absorption heat pump, said generator being heated by the waste heat of the process and, by melting the ice crystals by this vapor. The solution to be treated is cooled near to the triple point in a multi-stage flash evaporator, the condensers of which are cooled by the pure liquid melted from the ice, and the excessive heat is removed from the process by absorbing part of the vapor being generated in the generator to a medium present in the absorber of a second absorption pump, which medium is more dilute than the medium used in the previous absorber.
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