Liquid purification or separation – Processes – Including controlling process in response to a sensed condition
Patent
1999-10-22
2000-12-12
Drodge, Joseph W.
Liquid purification or separation
Processes
Including controlling process in response to a sensed condition
73 6169, 73717, 210 90, 210275, 210741, 210745, 210793, B01D 3543
Patent
active
061593842
ABSTRACT:
A differential pressure monitor measures the pressure at a plurality of heights in a filter bed. A preferred embodiment of the monitor comprises an elongated body, a plurality of pressure sensors located on the elongated body for obtaining the pressure readings, a control apparatus for determining differential pressures from the pressure readings, each differential pressure being the difference in pressure between pressures measured at two different heights in the filter bed, and transmission apparatus to transmit the pressure readings from the pressure sensors to the control apparatus. Methods of monitoring and controlling the performance of a filter bed during filtration and during backwashing also are provided. Two such methods include measuring turbidity levels in a filter bed and obtaining water samples from a filter bed.
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Roberts R. Lee
Simmons John D.
Drodge Joseph W.
RG Delaware Inc.
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