Segregated zoning combustion

Patent · Tue Dec 31 00:00:00 EST 1991

OSTI ID:5573249

Kobayashi, H

This patent describes a method for carrying out combustion with low NO{sub x} generation. It comprises providing a combustion zone containing an atmosphere of furnace gases at a temperature exceeding 1000{degrees} F; injecting into the combustion zone an oxidant stream and mixing furnace gases with the injected oxidant in an oxidant mixing zone within the combustion zone to produce an oxidant mixture having an oxygen concentration which is not more than 10 percent; flowing the oxidant mixture out from the oxidant mixing zone to provide additional furnace gases to the combustion zone; injecting into the combustion zone a fuel stream, mixing furnace gases with the injected fuel in a fuel reaction zone within the combustion zone, and carrying out combustion with low NO{sub x} generation within the fuel reaction zone to produce a fuel reaction mixture; flowing the fuel reaction mixture out from the fuel reaction zone to provide additional furnace gases to the combustion zone; creating sufficient mixing within the combustion zone so that the composition of the atmosphere at points within the combustion zone outside of the oxidant mixing zone and the fuel reaction zone is substantially the same; and maintaining the oxidant mixing zone and the fuel reaction zone segregated within the combustion zone.

• Assignee: Union Carbide Industrial Gases Technology Corp., Danbury, CT (United States)
• Patent Number(s): US 5076779; A
• Application Number: PPN: US 7-684289
• OSTI ID: 5573249
• Resource Relation: Patent File Date: 12 Apr 1991
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
COMBUSTION
SEGREGATION
NITROGEN OXIDES
INHIBITION
CONCENTRATION RATIO
FURNACES
GASES
MIXING
MIXTURES
OXIDIZERS
OXYGEN
STEAM INJECTION
TEMPERATURE RANGE 0400-1000 K
CHALCOGENIDES
CHEMICAL REACTIONS
DISPERSIONS
ELEMENTS
FLUID INJECTION
FLUIDS
NITROGEN COMPOUNDS
NONMETALS
OXIDATION
OXIDES
OXYGEN COMPOUNDS
TEMPERATURE RANGE
THERMOCHEMICAL PROCESSES
400800* - Combustion
Pyrolysis
& High-Temperature Chemistry