Methods and apparatus for burning fuel with low nox formation
Patent
·
OSTI ID:7071757
This patent describes a method of combusting a fuel-air mixture wherein fuel is discharged from at least one nozzle disposed within a burner housing, air introduced into the housing in mixed with the fuel and the resulting fuel-air mixture is ignited and combusted. The improvement described here is whereby the formation of nitrogen oxides is inhibited comprising the steps of: discharging a first portion of the fuel from the nozzle through one or more orifices therein whereby the fuel mixes with air and provides an ignition zone adjacent to the nozzle; discharging a second portion of the fuel from the nozzle through one or more additional orifices therein whereby the second portion of fuel is distributed in a turbulent pattern which causes the fuel to mix with a rate of air in excess of that required for the stoichiometric burning thereof and to burn in a primary combustion zone; and discharging the remaining portion of the fuel from the nozzle through at least one additional orifice surrounded by a fuel discharge recess whereby a high velocity jet of fuel substantially shielded by slower moving fuel is produced.
- Assignee:
- John Zink Co., Tulsa, OK
- Patent Number(s):
- US 4645449
- OSTI ID:
- 7071757
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400800 -- Combustion
Pyrolysis
& High-Temperature Chemistry
42 ENGINEERING
421000* -- Engineering-- Combustion Systems
500200 -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
AIR FLOW
AIR POLLUTION ABATEMENT
BURNERS
CHALCOGENIDES
CHEMICAL REACTIONS
COMBUSTION
COMBUSTION CONTROL
COMBUSTION PRODUCTS
CONTROL
DILUTION
DISPERSIONS
FLUID FLOW
FUEL-AIR RATIO
FUELS
GAS FLOW
IGNITION
JETS
MIXING
MIXTURES
NITROGEN COMPOUNDS
NITROGEN OXIDES
NOZZLES
OPENINGS
ORIFICES
OXIDATION
OXIDES
OXYGEN COMPOUNDS
POLLUTION ABATEMENT
STOICHIOMETRY
THERMOCHEMICAL PROCESSES
TURBULENT FLOW
400800 -- Combustion
Pyrolysis
& High-Temperature Chemistry
42 ENGINEERING
421000* -- Engineering-- Combustion Systems
500200 -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
AIR FLOW
AIR POLLUTION ABATEMENT
BURNERS
CHALCOGENIDES
CHEMICAL REACTIONS
COMBUSTION
COMBUSTION CONTROL
COMBUSTION PRODUCTS
CONTROL
DILUTION
DISPERSIONS
FLUID FLOW
FUEL-AIR RATIO
FUELS
GAS FLOW
IGNITION
JETS
MIXING
MIXTURES
NITROGEN COMPOUNDS
NITROGEN OXIDES
NOZZLES
OPENINGS
ORIFICES
OXIDATION
OXIDES
OXYGEN COMPOUNDS
POLLUTION ABATEMENT
STOICHIOMETRY
THERMOCHEMICAL PROCESSES
TURBULENT FLOW