Patent ID: 6123838
Filing Date: 2000-09-26
Classification: C02F,D06F,Y10S

Abstract:
An apparatus for purifying separator waste water from a dry cleaning process comprising:a separator tank with sides, a top end and a bottom end, an inlet located near the top end of the separator tank for the introduction of dry cleaning waste water, the dry cleaning waste water containing solvent and water, the solvent settling by gravity below the separated water;a solvent exclusion weir located in the separator tank, the solvent exclusion weir containing an inlet that allows separated water to enter the exclusion weir located near the top of the separator tank;a first pump for moving the separated water from the solvent exclusion weir to an air stripping tower;the air stripping tower having sides, a top end and a bottom end, the separated water entering near the top of the air stripping tower, a bubble ring located near the bottom of the air stripping tower allowing air bubbles to be in contact with the separated water, the air bubbles dissolving solvent in the separated water forming air stripped water;a second pump for moving the air stripped water from the bottom end of the air stripping tower to the top of a carbon filter;the carbon filter having sides and a top and a bottom, the air stripped water entering the top of the carbon filter, the dissolved solvent in the air stripped water being filtered by the carbon filter forming carbon purified water exiting from the bottom of the carbon filter; anda third pump for moving the carbon purified water from the bottom of the carbon filter to an evaporation nozzle for evaporating the carbon purified water into the air.