Liquid purification or separation – Flow – fluid pressure or material level – responsive – Proportionate feed means
Patent
1984-08-20
1986-01-07
Adee, John
Liquid purification or separation
Flow, fluid pressure or material level, responsive
Proportionate feed means
210104, 210138, 210143, 55228, B01D 2124
Patent
active
045632740
ABSTRACT:
An aqueous solution carrying paint solids is fed through an inlet into a floatation tank. The clean liquid exits through an orifice whose size is controlled by a movable gate. The level of the liquid within the tank is sensed by an ultrasonic rangefinder and the distance signals output from this rangefinder are fed to an electronic controller. During normal operation, this controller periodically supplies power signals to an electric actuator to adjust the position of the gate whereby the level of the liquid in the tank can be maintained substantially at the a first predetermined level. The controller may also include means for causing the liquid to rise to a second predetermined level after a preset time such that the paint solids are transferred over a weir into a collecting vessel. Thereafter the liquid level is caused to rapidly drop and is again maintained at the first level.
REFERENCES:
patent: 2994432 (1961-08-01), Schluter
patent: 3755804 (1973-08-01), Johnson
patent: 4100066 (1978-07-01), Bloomer et al.
patent: 4261707 (1981-04-01), Bradshaw
Collis Ronald
Rothon Stephen
Adee John
Haden Drysys International Limited
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