Patent ID: 6123813
Filing Date: 2000-09-26
Classification: B01D,B03C,C02F

Abstract:
An electrostatic treating apparatus in which a pair of electrodes 4 is arranged in an insulating solvent A contained in a tank 1 provided with an inlet 3 for a liquid 2 to be treated at the bottom and a direct current high voltage is applied between the electrodes 4 and one side wall of the tank 1 is made to be a double wall to form a pocket 7 between its inner wall 5 and its outer wall 6 and an upper edge of the inner wall 5 is positioned above the liquid surface of said solvent A so that the suspended impurity of sludge layer formed on the upper surface of the solvent A overflows to the pocket 7 from the upper edge of said inner wall 5 and said pair of electrodes 4 is arranged asymmetrically with respect to a vertical axis of the tank 1 and inclined upward at an angle of 25 to 40.degree. relative to a horizontal plane and said pocket 7 is provided to be positioned at a side where the upper edge of said electrodes 4 is present, anda guide plate 8 for guiding treated water to the upper side of the pocket 7 is provided at the lower part of an aqueous layer B formed above the upper edge of the inner wall 5 of said pocket 7 and a porous rectifying plate 10 is provided substantially horizontally so as to cover an opening 9 between said guide plate 8 and said outer wall 6 above the upper edge of said guide plate 8 and a floated sludge separating chamber 11 open to the bottom is provided above said porous rectifying plate 10, anda discharge outlet 12 for treated water is provided on the wall 13 facing to said pocket 7 of the tank 1 so as to be positioned above the lower end of the inner wall 14 of said floated sludge separating chamber 11, anda water rectifier 15 is fixed to said inlet 3 for the liquid to be treated, anda solvent outlet 16 is provided on the wall 13 facing said pocket 7 of the tank 1 so as to be positioned above the upper end of said electrodes 4 and below the lower end of said guide plate 8 and a solvent inlet 17 is provided on the wall 13 facing said pocket 7 of the tank 1 near the bottom and a precipitated sludge outlet 20 is provided to the bottom of said pocket 7, characterized in that:said guide plate 8 is inclined so that its side wall side facing said pocket 7 is made to be the lower end and its pocket 7 side is made to be the upper end to form an opening 9 between the outer side wall 6 of the pocket 7 and the guide plate 8 but is formed so that the other portion divides the aqueous layer B in the tank 1 into two layers, andplural baffle plates 18 having openings at the upper part and the lower part alternately are equipped vertically at given intervals between said guide plate 8 and a lid D of the tank 1, andan adsorbing agent vessel 19 for passing water vertically and being equipped between said baffle plates 18, andsaid electrodes 4 and the main parts of said guide plate 8 are hung and fixed to the lid D of the tank 1 for enabling said electrodes and the main parts of said guide plate to be equipped to the tank 1 together with the lid D.