Concentrating evaporators – Processes – Involving waste liquid
Patent
1994-06-16
1995-11-21
Manoharan, Virginia
Concentrating evaporators
Processes
Involving waste liquid
159 29, 159 163, 159DIG12, 159DIG19, 203 75, 203 76, 203 77, 203 78, 203 79, 203 80, 203 49, 976DIG381, 588 20, B01D 100, B01D 338, G21F 908
Patent
active
054683475
ABSTRACT:
The present invention provides a method for separating boric acid from a liquid, especially liquid waste obtained from a nuclear power plant. In the process, the waste solution containing the boric acid is contacted with steam in a reactor so that the boric acid evaporates from the liquid and passes into the steam vapor phase. Consequently, the radioactive wastes which are not evaporated with the steam remain in the waste water while the boric acid is removed from the waste water when it passes into the vapor or steam phase. The boric acid can then be separated and recovered from the steam by means of a distillation and fractionating column or a wash column. By removing the boric acid from the liquid waste, it is possible to obtain concentrated radioactive waste having a reduced volume due to the absence of boric acid in the waste.
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Braet Johan
Bruggeman Aime
Manoharan Virginia
Studiecentrum Voor Kernenergie
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