Patent ID: 8048381
Filing Date: 2011-11-01
Classification: F23G,F23L,F23N

Abstract:
1. An apparatus for optimizing the exhaust gas burnout in combustion plants having a solid bed combustion zone ( 1 ) and an exhaust gas burnout zone ( 4 ) in which oxygen-containing secondary gas ( 6 ) is mixed with the combustion gas in an effective area ( 5 ) of the exhaust gas burnout zone ( 4 ), comprising a plurality of oxygen-containing secondary gas injection nozzles ( 15 ) each including a control valve for controlling the flow volume through each individual nozzle into a particular cross-section of the effective area ( 5 ), an infrared camera for determining the presence of incompletely burned exhaust gas components in distinctive cross-sections of the effective area ( 5 ) and a device measuring spectral radiation including a filter selecting a limited wave range for providing, upon detection of such incompletely burned exhaust gas components in a particular cross-section, signals representing local concentrations of gas components of at least one of carbon monoxide, hydrocarbons and soot, and a control unit converting these signals into control signals for controlling the control valves of the individual nozzles serving the respective cross-sections in which the presence of incompletely burned exhaust gas components is indicated for controlling the injection of the oxygen-containing secondary gas specifically to the particular cross-sections in which the presence of incompletely burned exhaust gas components has been detected.