Apparatus for controlling foam

Details Apparatus for controlling foam Apparatus for controlling foam

1997-09-15

1999-07-13

Chiesa, Richard L.

Gas separation: apparatus

Degasifying means for liquid

Defoaming means

95155, 95157, 95242, B01D 1904

Patent

active

059221127

ABSTRACT:
A system for automatically delivering an anti-foaming agent to a biological aste treatment system includes a sensor for monitoring the amount of foam present in the system, a pump for pumping a predetermined quantity of anti-foaming agent into the system, and a controller for initiating the pumping sequence when the quantity of foam in the system reaches a preselected level. The controller includes two relays. The first relay controls the length of time the pump is on, thereby controlling the amount of anti-foam injected into the system, and the second relay establishes a period of time following the pumping period when the pump cannot be activated, thereby providing a period of time for the anti-foam to break down the foam before additional anti-foam can be added.

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patent: 5271526 (1993-12-01), Williams
patent: 5437842 (1995-08-01), Jensen et al.

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