Nitrogen oxide removal control apparatus
December 22, 2013. 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 ReferencesInput control method and means for nitrogen oxide removal means Controlling the injection of ammonia in a dry type exhaust gas denitration process Catalytic pollution control system for gas turbine exhaust Ammonia control system for NOx emission control for gas turbine exhaust Method of regulating the amount of reducing agent added during catalytic reduction of NOx contained in flue gases Method of regulating the amount of reducing agent added during catalytic reduction of NOx contained in flue gases Apparatus for removing NOx from a gas Combustion control apparatus for a coal-fired furnace Patent #: 5158024 InventorAssigneeApplicationNo. 171454 filed on 12/22/1993US Classes:422/111, Material is an input to contact zone422/168, Waste gas purifier422/177, Including solid, extended surface, fluid contact reaction means; e.g., inert Raschig rings, particulate absorbent, particulate or monolithic catalyst, etc.423/239.1, Utilizing solid sorbent, catalyst, or reactant700/267, Titration or pH level706/900FUZZY LOGICExaminersPrimary: Warden, Robert J.Assistant: Carpenter, Robert Attorney, Agent or FirmForeign Patent References
International ClassesB01D 053/56B01D 053/90 G05D 011/08 G05D 011/13 Foreign Application Priority Data1992-12-25 JPAbstractA plant with a gas turbine such as a combined cycle power plant of a gas turbine cycle and a steam turbine cycle is provided with a nitrogen oxide removal device for removing NOx by injecting ammonia to an exhaust gas of the gas turbine. The device reduces NOx concentration to a certain value or less before the exhaust gas is released to the air. An ammonia flow amount is rapidly controlled such that a mole ratio of ammonia to NOx coincides with a set mole ratio value. The mole ratio is calculated from a predicted NOx concentration at an inlet of the nitrogen oxide removal device predicted by calculating operation conditions of the gas turbine, an ammonia flow amount value, and an exhaust gas flow amount. The set mole ratio value is calculated from a deviation of a measured NOx concentration value at an outlet of the nitrogen oxide removal device and a set NOx concentration value, and an amount of water injected to a combustor. Finally, a controlled system is stabilized in a state where a measured NOx concentration value coincides with the set NOx concentration value at a high speed.Other References
Field of SearchMaterial is an input to contact zoneWaste gas purifier And means downstream of a stage for injecting a reactant into waste gas for interreaction in subsequent stage Including solid, extended surface, fluid contact reaction means; e.g., inert Raschig rings, particulate absorbent, particulate or monolithic catalyst, etc. Combined Utilizing solid sorbent, catalyst, or reactant |
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