APPARATUS FOR RECOVERING SALT FROM SALT WATER CONTAMINATED WITH NITRATE NITROGEN

摘要

PURPOSE: An apparatus for recovering salt from waste salt water used for removal of nitrate nitrogen and heavy metals is provided, which decreases the amount of salt used and the effluent of waste salt water for pollution prevention. CONSTITUTION: The apparatus for recovering salt is characterized by comprising a pipe heater(2), an evaporation tank and a screw(4) for recovering deposited salt. The waste salt water is concentrated by circulating between the pipe heater and the evaporation tank, and the vapor generated from the circulation is discharged through an outlet(8). Accordingly, the salt is deposited from the concentrated salt water and recovered by working the screw. The apparatus recovers salt more than 75%.