Method for reducing NOx emissions from combustion processes
Patent
·
OSTI ID:6191540
The present invention relates to a method for the noncatalytic reduction of NOx in combustion gases which method includes maintaining an excess of fuel to air during combustion, cooling the combustion gases to between 2400 and 3000/sup 0/F, and injecting into the cooled gases ammonia in a ratio 1:1 to 1:4 NOx to nh3. After the ammonia has been injected to reduce the NOx, the gas is further cooled to between 1900 and 2300/sup 0/F and secondary air injected into the gases to complete combustion of the fuel.
- Assignee:
- Roldiva Inc
- Patent Number(s):
- US 4335084
- OSTI ID:
- 6191540
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
30 DIRECT ENERGY CONVERSION
300100* -- Direct Energy Conversion-- MHD Generators
42 ENGINEERING
421000 -- Engineering-- Combustion Systems
424000 -- Engineering-- Pollution Control Equipment-- (1980-1989)
AIR
AMMONIA
CHALCOGENIDES
CHEMICAL REACTIONS
COMBUSTION
CONTROL
COOLING
DIRECT ENERGY CONVERTERS
ENERGY SOURCES
EQUIPMENT
EXHAUST GASES
FLUIDS
FOSSIL FUELS
FUEL-AIR RATIO
FUELS
GASEOUS WASTES
GASES
HYDRIDES
HYDROGEN COMPOUNDS
INJECTION
INTAKE
MHD GENERATORS
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
NITROGEN OXIDES
OXIDATION
OXIDES
OXYGEN COMPOUNDS
POLLUTION CONTROL EQUIPMENT
REDUCTION
THERMOCHEMICAL PROCESSES
WASTES
300100* -- Direct Energy Conversion-- MHD Generators
42 ENGINEERING
421000 -- Engineering-- Combustion Systems
424000 -- Engineering-- Pollution Control Equipment-- (1980-1989)
AIR
AMMONIA
CHALCOGENIDES
CHEMICAL REACTIONS
COMBUSTION
CONTROL
COOLING
DIRECT ENERGY CONVERTERS
ENERGY SOURCES
EQUIPMENT
EXHAUST GASES
FLUIDS
FOSSIL FUELS
FUEL-AIR RATIO
FUELS
GASEOUS WASTES
GASES
HYDRIDES
HYDROGEN COMPOUNDS
INJECTION
INTAKE
MHD GENERATORS
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
NITROGEN OXIDES
OXIDATION
OXIDES
OXYGEN COMPOUNDS
POLLUTION CONTROL EQUIPMENT
REDUCTION
THERMOCHEMICAL PROCESSES
WASTES