Liquid purification or separation – Flow – fluid pressure or material level – responsive – Check valve
Patent
1987-01-29
1987-12-08
Sever, Frank
Liquid purification or separation
Flow, fluid pressure or material level, responsive
Check valve
2102211, 210232, 210525, B01D 4502
Patent
active
047117168
ABSTRACT:
A decanting apparatus for a wastewater treatment reactor includes a clarified fluid receiver having fluid receiving ports therein, support structure for maintaining the fluid receiver at a desired level within the reactor and flap means selectively biased to occlude the ports of the receiver during mixing cycles so as to prevent entry of sludge into the receiver and to selectively allow entry of clarified fluid through the ports when the sludge is settled. When the valve is closed, biasing means urges the flap to reseal the ports of the receivers so that sludge does not enter the receiver during sludge mixing cycles within the reactor. The receiver support structure includes an articulated and flexible joint to connect the receiver to the wall of the reactor, yet allow the receiver to maintain a desired level relative to fluid in the reactor and further maintain the receiver at a desired depth beneath the surface of the liquid level within the reactor to prevent floating debris from entering the receiver.
REFERENCES:
patent: 1203578 (1916-11-01), Brooks
patent: 3333704 (1967-08-01), McGivern et al.
patent: 3613889 (1971-10-01), Reed
patent: 3666102 (1972-05-01), Blanchard
patent: 3757953 (1973-09-01), Sky-Eagle, Jr.
patent: 4290887 (1981-09-01), Brown et al.
patent: 4648967 (1987-03-01), Calltharp et al.
Technology Evaluation of Sequencing Batch Reactors, by James M. Montgomery, Consulting Engineers, Inc., Sep. 1984.
Calltharp Glen R.
Nelson Dennis L.
Norcross, III Kenneth L.
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