Process and apparatus for purification of industrial brine

摘要

A brine purification apparatus comprising:
(1a) a first forced circulation evaporative crystallizer;
(1b) a second forced circulation evaporative crystallizer;
(2a) a first separation device for separating solids from liquids;
(2b) a second separation device for separating solids from liquids;
(3a) a first dilution vessel; and
(3b) a second dilution vessel,
wherein the first forced circulation evaporative crystallizer is connected to the first separation device for conducting a slurry stream comprising an aqueous liquid and crystals from the first forced circulation evaporative crystallizer to the first separation device;
the first separation device is connected to the first dilution vessel for conducting crystals from the first separation device to the first dilution vessel;
the first dilution vessel is connected to a source of aqueous liquid for redissolving crystals received from the first separation device;
the first dilution vessel is connected to the second forced circulation evaporative crystallizer for conducting a brine comprising redissolved crystals from the first dilution vessel to the second forced circulation evaporative crystallizer;
the second forced circulation evaporative crystallizer is connected to the second separation vessel for conducting a slurry stream comprising an aqueous liquid and crystals from the second forced circulation evaporative crystallizer to the second separation device;
the second separation device is connected to the second dilution vessel for conducting crystals from the second separation device to the second dilution vessel;
the second dilution vessel is connected to a source of aqueous liquid for redissolving crystals received from the second separation device; and
the second dilution vessel is connected to the first separation device for conducting a brine comprising redissolved crystals from the second dilution vessel to the first separation device for washing the crystals separated by the first separation device