General Electric Company

Antonio Marquez

David Kelly Moyeda

Roy Payne

Larry Swanson

Boris Nickolaevich Eiteneer

Neil Colin Widmer

Wei Zhou

Philippe Jean Gauthier

Xu Guang

Santosh Nareddy

Larry William Swanson

A method for reducing the emissions from combustion gases produced during a combustion process includes injecting a hydrocarbon-based reducing agent into the combustion gases to form a combustion gas mixture. The combustion gas mixture including oxides of nitrogen, NO, is directed through a selective catalyst reduction (SCR) system including a catalyst bed to remove NOfrom the combustion gas mixture and to produce an exhaust gas. In one embodiment, the exhaust gases are released from the SCR to the atmosphere.

Apparatus for a nitrogen purge system

An apparatus to introduce a reagent to reduce nitrogen oxides in flue gas including: nozzles mounted to a passage for the flue gas, wherein the nozzles are mounted downstream of a SNCR system and upstream of a SCR system, wherein the nozzles are mounted on one or more walls of the passage and are configured to inject a pressurized fluid into the flue gas; a source of the pressurized fluid which is in fluid communication with the nozzles such that the pressurized fluid flows to the nozzles; a source of a NOx reducing reagent and a mixing device which mixes the reagent with the pressurized fluid such that the pressurized fluid flowing to the nozzles includes the reagent.

Method and apparatus to inject reagent in SNCR/SCR emission system for boiler

Combustion systems having reduced nitrogen oxide emissions and methods of using the same are disclosed herein. In one embodiment, a combustion system is provided. The combustion system includes a combustion zone, which includes a burner for converting a fuel, under fuel rich conditions, to a flue gas. An intermediate staged air inlet is downstream from the combustion zone, for supplying intermediate staged air to the flue gas and producing fuel lean conditions. A reburn zone is downstream from the intermediate staged air inlet for receiving the flue gas. A process for using the combustion system and a method of reducing NOflowing into the reburn zone of a combustion system are also described herein.

Combustion systems and processes for burning fossil fuel with reduced nitrogen oxide emissions

Methods and systems for reducing the emissions from combustion gases

An apparatus for controlling the emissions of nitrogen oxides from a combustion system includes at least one nozzle assembly having an array of openings for delivering droplets of a fluid chemical agent to a flue gas within the combustion system; a controller operatively coupled to the at least one nozzle assembly for controlling the size and distribution of each droplet; an excitation mechanism operatively coupled to the at least nozzle assembly for providing additional control over the size and distribution of each droplet; and the array of openings arranged for deflecting the droplets to prevent droplet collisions.

Method and apparatus for reducing emission of nitrogen oxides from a combustion system

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San Dimas, CA, United States of America

Antonio Marquez