Biomass boiler SCR NOx and CO reduction system
Assignee2E Environmental, LLC
InventorRobert Ellery
Life of this patent
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Abstract
A selective catalytic reduction system and method for reducing nitrogen oxide (NOx) emissions comprising a boiler producing flue gas emissions, a particulate control device receiving flue gas emissions from the boiler, a selective catalytic reduction unit (SCR) receiving flue gas emissions from the particulate control device and reducing nitrogen oxide (NOx) emissions, and a heat exchanger located downstream of the selective catalytic reduction unit (SCR) for removing heat from the flue gas for preheating at least one of boiler feed water and combustion air for the boiler.
Claims14
A selective catalytic reduction system for reducing nitrogen oxide (NOx) emissions comprising
- a boiler producing flue gas emissions,
- a particulate control device receiving flue gas emissions from the boiler,
- a selective catalytic reduction unit (SCR) receiving 530°-600° F. flue gas emissions from the particulate control device that have not been heated subsequent to leaving the boiler, the SCR reducing nitrogen oxide (NOx) emissions, and
- an injector combining at least one of the group consisting of ammonia and urea with the flue gas emissions for reaction with a catalyst in the SCR.
A selective catalytic reduction system for reducing nitrogen oxide (NOx) emissions comprising
- a boiler producing flue gas emissions,
- a particulate control device receiving flue gas emissions from the boiler,
- a selective catalytic reduction unit (SCR) receiving 530°-600° F. flue gas emissions from the particulate control device that have not been heated subsequent to leaving the boiler, the SCR reducing nitrogen oxide (NOx) emissions, and
- wherein the boiler includes an installed selective non-catalytic reduction (SNCR) system.
A method for reducing nitrogen oxide (NOx) emissions comprising
- operating a boiler having an installed selective non-catalytic reduction (SNCR) system to produce heat and waste gas,
- removing particulates from the waste gas,
- after removing particulates, processing 530°-600° F. waste gas that has not been heated subsequent to leaving the boiler in a selective catalytic reduction unit (SCR) to remove nitrogen oxide (NOx) emissions.
Dependencies are inferred from the claim text.