Gas separation: processes – With control responsive to sensed condition – Concentration sensed
Patent
1995-07-13
1997-09-16
Drodge, Joseph W.
Gas separation: processes
With control responsive to sensed condition
Concentration sensed
55227, 55229, 55270, 73 3105, 95187, 204415, 204431, 210916, 436121, B01D 5330
Patent
active
056675585
ABSTRACT:
A scrubber apparatus and controller includes an outlet gas sensor, and a processor operatively connected to the outlet gas sensor and a treatment chemical supply pump for controlling a level of treatment chemical in scrubbing solution responsive to the sensed undesired constituent, such as hydrogen sulfide and/or other odorous gases associated with wastewater. Accordingly, the controller enhances reduction of the undesired constituent in the gas being treated and while conserving consumption of treatment chemical. To enhance the operating life of the outlet and inlet gas sensors, the processor preferably only periodically exposes the gas sensors to gas, and also periodically supplies purging air to the gas sensors. The controller preferably includes an environmentally resistant housing containing the processor means and the outlet gas sensor. In addition, the inlet gas sensor is also preferably included to provide feed forward control and also to provide a log of both inlet and outlet gas readings. Method aspects of the invention are also disclosed.
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Bryan Avron
Resch Darrel
Adapco, Inc.
Drodge Joseph W.
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