Liquid purification or separation – Processes – Including controlling process in response to a sensed condition
Patent
1997-11-07
1999-11-09
Drodge, Joseph W.
Liquid purification or separation
Processes
Including controlling process in response to a sensed condition
73 6169, 73717, 73756, 73864, 210 90, 210108, 210275, 210739, 210745, 210793, B01D 1712, B01D 2446, G01L 1300, G01L 1302
Patent
active
059807555
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 means 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 means to transmit the pressure readings from the pressure sensors to the control means. 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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