Chemical apparatus and process disinfecting – deodorizing – preser – Control element responsive to a sensed operating condition – Control element responds proportionally to a variable signal...
Patent
1995-11-01
1998-02-24
Bhat, Nina
Chemical apparatus and process disinfecting, deodorizing, preser
Control element responsive to a sensed operating condition
Control element responds proportionally to a variable signal...
422111, 422177, 422211, 422234, 95 8, 95 9, 95187, 55228, 55229, 261197, G05D 700, B01D 5000, B01D 5334
Patent
active
057209260
ABSTRACT:
An apparatus for removing a contaminant from a gas effluent. The apparatus comprises an absorption tower in which is placed a suitable packing where the gas effluent and contaminant-absorbing liquid contact one another. A recirculation path transfers spent contaminant-absorbing liquid to the top of the tower allowing the liquid to effect a new contaminant-removal cycle. Reagent is introduced in the recirculation path to refresh the contaminant-absorbing liquid. A dual-controller system dynamically varies the amount of reagent introduced in the recirculation path in accordance with the amount of contaminant in the gas effluent. A master controller calculates a reagent concentration set-point. The set-point is communicated to a slave controller that meters reagent in the recirculation path according to the set-point value.
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Benallal Belhocine
Chouinard Denis
Ethier Josee
Roy Benoit
Roy Veronique
Bhat Nina
Environair S.I.P.A. Inc.
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