METHOD OF REMOVING MINERAL SALTS FROM GLYCOL SOLUTION Russian patent published in 1998 - IPC

FIELD: liquid purification methods. SUBSTANCE: invention is designed for gas treatment plants, in particular, when regenerating absorbents polluted by mineral salts. Method consists in passing polluted glycol solution through recuperative heat exchanger into evaporating apparatus, wherein desired temperature is maintained by pump-assisted circulation of solution through evaporator. Distillate from evaporating apparatus is cooled in recuperative heat exchanger and refrigerator. Resulting mixture is consecutively fed into two collection tanks. Liquid phase from the second one is divided into two streams, one of them being directed by vacuum pump into separator and the second to consumer. In the recuperative heat exchanger, mixture is cooled to temperature ensuring minimum condensation of water vapor and condensate is fed into the first collection tank. From the latter, vapor phase is pumped off by vacuum pump into separator and a part of the liquid phase is directed through additional line into evaporator. Amount of liquid is chosen such as to maintain boiling state of liquid in evaporator outlet. EFFECT: enhanced process efficiency. 1 dwg, 1 tbl