Methods and systems for reducing NOx emissions in industrial combustion systems
AssigneeGeneral Electric Company
InventorsDonald Keith Morrison, William Theodore Lipinski, Donald Keith Hartsock
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Abstract
A method for operating a combustion system to facilitate reducing emissions from the system is provided. The method includes supplying an aqueous selective reducing agent from an aqueous selective reducing agent source to an atomizer that is directly coupled in flow communication with the aqueous selective reducing agent source. The method also includes atomizing the selective reducing agent in the atomizer, and injecting atomized droplets of the selective reducing agent from the atomizer directly into a transport stream of flue gas flowing within a temperature zone defined within the combustion system.
Claims20
A method for operating a combustion system to facilitate reducing emissions from the system, said method comprising:
- supplying an aqueous selective reducing agent from an aqueous selective reducing agent source to an atomizer coupled in direct flow communication to the aqueous selective reducing agent source;
- atomizing the selective reducing agent in the atomizer;
- and
- injecting atomized droplets of the selective reducing agent from the atomizer directly into a transport stream of flue gas flowing within a temperature zone defined within the combustion system, and wherein the aqueous selective reducing agent discharged from the aqueous selective reducing agent source is channeled only to the atomizer prior to being injected into the temperature zone, wherein a blower coupled to the atomizer and to the aqueous selective reducing agent source forces the selective reducing agent from the aqueous selective reducing agent source to the atomizer.
A combustion system to facilitate reducing emissions, said combustion system comprising:
- an aqueous selective reducing agent source for supplying an aqueous selective reducing agent;
- an atomizer coupled in direct flow communication to said aqueous selective reducing agent source, said atomizer receives and atomizes the selective reducing agent that is supplied from said aqueous selective reducing agent source;
- a temperature zone defined within said combustion system, wherein said atomizer directly injects atomized droplets of the selective reducing agent into a transport stream of flue gas flowing within said temperature zone, wherein the selective reducing agent discharged from said aqueous selective reducing agent source is channeled only to said atomizer prior to being injected into said temperature zone;
- and
- a blower coupled to said atomizer and to said aqueous selective reducing agent source for forcing the selective reducing agent from said aqueous selective reducing agent source toward said atomizer.
A reagent injection system to facilitate reducing emissions from a combustion system, said reagent injection system comprising:
- an aqueous selective reducing agent source for supplying an aqueous selective reducing agent;
- an atomizer coupled in direct flow communication to said aqueous selective reducing agent source, said atomizer receiving and atomizing the selective reducing agent that is supplied from said aqueous selective reducing agent source, said atomizer injecting atomized droplets of the selective reducing agent from said atomizer directly into a transport stream of flue gas flowing within a temperature zone defined within said combustion system, wherein the aqueous selective reducing agent discharged from said aqueous selective reducing agent source is channeled only to said atomizer prior to being injected into said temperature zone;
- and
- a blower coupled to said atomizer and to said agueous selective reducing agent source for forcing the selective reducing agent from said aqueous selective reducing agent source towards said atomizer.
Dependencies are inferred from the claim text.