Methods and apparatus for burning fuel with low NO/sub x/ formation

Patent · Tue Aug 05 04:00:00 EDT 1986

OSTI ID:5401189

Schwartz, R E; Noble, R K

This patent describes a burner apparatus for combusting a fuel-air mixture wherein fuel is discharged from at least one nozzle disposed within a chamber, air is caused to flow into the chamber whereby it mixes with the fuel and the resulting fuel-air mixture is ignited and combusted. The improvement described here includes the formation of nitrogen oxides inhibited comprising: the nozzle having one or more ignition orifices disposed therein positioned to discharge a first portion of the fuel therethrough whereby the fuel mixes with air and provides an ignition zone adjacent the nozzle; one or more primary combustion orifices disposed in the nozzle positioned to discharge a second portion of the fuel therethrough whereby the 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 the burn in a primary combustion zone; and one or more secondary combustion orifices surrounded by a fuel discharge recess, the secondary orifices and recess being disposed in the nozzle interiorly of the primary combustion orifices and positioned to discharge the remaining portion of the fuel therethrough in the form of high velocity jets of fuel shielded by slower moving fuel whereby the fuel is distributed within and downstream of the primary combustion zone, is mixed with air from the primary combustion zone diluted with combustion products and is burned in a secondary combustion zone substantially isolated for direct contact with incoming air by the primary combustion zone.

• Assignee: John Zink Co., Tulsa, OK
• Patent Number(s): US 4604048
• OSTI ID: 5401189
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
421000* -- Engineering-- Combustion Systems
AIR FLOW
AIR POLLUTION ABATEMENT
BURNERS
CHALCOGENIDES
CHEMICAL REACTIONS
COMBUSTION
DESIGN
DISPERSIONS
FLUID FLOW
FUEL-AIR RATIO
FUELS
GAS FLOW
IGNITION
JETS
MIXTURES
NITROGEN COMPOUNDS
NITROGEN OXIDES
NOZZLES
OPENINGS
OPERATION
ORIFICES
OXIDATION
OXIDES
OXYGEN COMPOUNDS
POLLUTION ABATEMENT
POSITIONING
STOICHIOMETRY
THERMOCHEMICAL PROCESSES
TURBULENT FLOW