Liquid purification or separation – Processes – Separating
Patent
1988-04-29
1989-05-16
Hart, Charles
Liquid purification or separation
Processes
Separating
55 85, 55228, 210805, 210806, 210167, 2101951, 210258, 210260, 261DIG11, C02F 100
Patent
active
048307610
ABSTRACT:
A portable, manned method and apparatus for cleaning cooling towers having a water collection basin at the base while permitting the tower to continue in operation comprises removing water and particulate contaminants from the bottom of the tower basin by venturi suction or aspiration through a tubular wand having an elongated wide opening to draw in water and particulate matter from a defined area of contact. The suction wand is moved around the bottom of the cooling tower basin to remove water and particulate matter therefrom. The removed water is filtered to separate coarse contaminant particles therefrom. The filtration is by a plurality of screens positioned one above another of successively finer mesh from top to bottom and having a motor for vibrating the screens to remove collected particulate matter therefrom. A collector is positioned adjacent to the ends of the screens to receive the particulate matter discharged by vibration of the screens by the motor. The filtrate is then passed through a plurality of bag filters of successively smaller porosity ranging from about 400 mesh down to about 1 micron to remove fine particles therefrom. Then the filtrate from the bag filters is recirculated to the cooling tower basin for reuse therein. Part may be is recirculated through the aspirator or venturi to produce a vacuum for withdrawing water and particulate contaminants from the bottom of the tower basin.
REFERENCES:
patent: 3068167 (1962-12-01), White
patent: 3842461 (1974-10-01), Wurster
patent: 4306967 (1981-12-01), Trautwein
patent: 4362628 (1982-12-01), Kennedy et al.
patent: 4401576 (1983-08-01), Meurer
patent: 4464315 (1984-08-01), D'Leory
Baize Thomas H.
Leach Jack S.
Hart Charles
Mosely Neal J.
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