Apparatus and associated method for reducing an undesired constituent of gas associated with wastewater and having sensor fault detection
First Claim
1. A scrubber apparatus for treating a gas associated with wastewater to reduce an undesired constituent in the gas, said scrubber apparatus comprising:
- a vessel;
gas flow means for flowing gas to be treated from associated wastewater through said vessel for treatment;
treatment means for reducing the undesired constituent in the gas flowing through said vessel;
gas sensor means for sensing the undesired constituent; and
processor means operatively connected to said gas sensor means and said treatment means for controlling said treatment means responsive to the sensed undesired constituent so as to enhance reduction of the undesired constituent in the gas being treated, said processor means further comprising sensor fault testing means for determining a sensor fault of said gas sensor means.
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Accused Products
Abstract
A scrubber apparatus and controller include a gas sensor, and processor for controlling treatment of gas responsive to the sensed undesired constituent so as to enhance reduction of the undesired constituent. The processor further determines a sensor fault and may generate an alarm signal responsive to the sensor fault. The gas sensor is preferably an electrochemical cell comprising an electrolyte and a pair of electrodes associated with the electrolyte. A sensor fault may be determined based upon an impedance of the electrolyte and the pair of electrodes. In addition, the electrochemical cell may include a gas permeable membrane and a pair of electrodes on opposing sides of the membrane to permit determination of damage to the membrane based upon an impedance measurement using the pair of electrodes.
39 Citations
32 Claims
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1. A scrubber apparatus for treating a gas associated with wastewater to reduce an undesired constituent in the gas, said scrubber apparatus comprising:
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a vessel; gas flow means for flowing gas to be treated from associated wastewater through said vessel for treatment; treatment means for reducing the undesired constituent in the gas flowing through said vessel; gas sensor means for sensing the undesired constituent; and processor means operatively connected to said gas sensor means and said treatment means for controlling said treatment means responsive to the sensed undesired constituent so as to enhance reduction of the undesired constituent in the gas being treated, said processor means further comprising sensor fault testing means for determining a sensor fault of said gas sensor means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A controller for use with a scrubber apparatus comprising a vessel and treatment means for reducing the undesired constituent in the gas flowing through the vessel, said controller comprising:
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a electrochemical cell gas sensor for sensing the undesired constituent in gas associated with the scrubber apparatus; and processor means operatively connected to said electrochemical cell gas sensor and the treatment means for controlling the treatment means responsive to the sensed undesired constituent so as to enhance reduction of the undesired constituent in the gas being treated, said processor means further comprising sensor fault testing means for determining a fault of said electrochemical cell gas sensor based upon impedance measuring thereof. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
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Specification