Method for testing systems designed for NOx reduction in the combustion of carbonaceous fuels
April 15, 2018. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesProcess for removal of nitrogen oxides from waste gas Urea reduction of NOx in combustion effluents Catalyst for selectively reducing nitrogen oxides from oxygen-containing exhaust gases Urea reduction of NOx in fuel rich combustion effluents Apparatus for preheating combustion air, accompanied by simultaneous reduction of NOx contained in the flue gases Method for pre-heating combustion air and for catalytically reducing noxious substances in flue gas Control of NOx reduction in flue gas flows Integrated catalytic/non-catalytic process for selective reduction of nitrogen oxides Catalytic sulfur trioxide flue gas conditioning Catalytic sulfur trioxide flue gas conditioning Patent #: 5540755 InventorAssigneeApplicationNo. 060944 filed on 04/15/1998US Classes:95/11, Flow of fluid mixture to sorber stopped or diverted to other equipment, or sorbent regenerated95/3, Concentration sensed95/4, Temperature sensed95/12, Gas flow rate modified95/14, Temperature sensed95/15, And pressure sensed95/16, Modification of flow rate of liquid which is added to gas95/65, Liquid addition precedes electrical precipitation96/19, Concentration or temperature sensing means96/53, Liquid spray means96/413, WITH SAMPLING MEANS96/417, WITH SIGNALS, INDICATORS, MEASURING, OR TESTING MEANS423/238, Utilizing liquid as reactant423/239.1Utilizing solid sorbent, catalyst, or reactantExaminersPrimary: Chiesa, Richard L.International ClassB03C 003/013AbstractA method for the in-situ predetermination of the effects of NOx reduction systems on selected components. This determination can yield quick, inexpensive and accurate results for a number of characteristics, for example: catalyst longevity; efficiency with differing fuels, in differing locations, and at different temperatures; potential of catalyst poisoning in specific circumstances; ammonia slip considerations; SCR and SNCR interplay, as well as staged NOx reduction design criteria; pressure and blockage considerations; downstream effect on air preheater elements; and more. These determinations can be made in real, or accelerated time. Furthermore, the determinations can be made before any system modifications are made, or to assist in increasing the efficiency of existing systems, or even to assist in predictions of preventive maintenance and associated down time.Other References
Field of SearchConcentration sensedFlow of fluid mixture to sorber stopped or diverted to other equipment, or sorbent regenerated Gas flow rate modified Including baffling, deflection, or restriction of gas flow Electric or electrostatic field (e.g., electrostatic precipitation, etc.) Temperature sensed Modification of flow rate of liquid which is added to gas Temperature sensed And pressure sensed Pressure sensed Gas flow rate modified Liquid addition precedes electrical precipitation With means for vapor or liquid contact (e.g., for gas separation, cooling, conditioning, etc.) Including gas flow distribution means Spiralling inflow, centrifugal, or whirl generating surface means Perforated baffle or gas diffuser Flow distribution means for parallel sections With indicating, signal, or alarm means WITH SAMPLING MEANS WITH SIGNALS, INDICATORS, MEASURING, OR TESTING MEANS With control means responsive to sensed condition Concentration or temperature sensing means Liquid spray means Including solid, extended surface, fluid contact reaction means; e.g., inert Raschig rings, particulate absorbent, particulate or monolithic catalyst, etc. Including waste gas flow distributor upstream of reaction site and within reaction chamber modifying velocity profile of gas Exhaust gas; e.g., pollution control, etc. Means separating particles from exhaust gas Means contacting exhaust gas with liquid Ammonia Utilizing liquid as reactant Utilizing solid sorbent, catalyst, or reactant |
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