JPS5787512A - Combustion device - Google Patents

Abstract

PURPOSE: To contrive the generation of a low NO_x by a method wherein air and fuel are supplied to a burner having a plurality of flame openings and a secondary air is fed around the burner while a part of the heated secondary air is suctioned under an ejector effect, and then struck against the flame again as a tertiary air.

CONSTITUTION: Volume of fuel is defined by a nozzle 4, injected into the burner 1 and mixed with the air defined by an air adjustor port 5 in a mixing chamber 3. The secondary air is defined by a secondary air adjustor port 11 in such a manner as a volume of air in the primary combustion chamber 8 is less than a theoretical air volume for the fuel outer flame containing CO, H₂, aldehyde is formed downstream of the primary flame generated at a flame port 2 and grown in the primary combustion chamber. The air adjusted by the third adjusting port 12 is injected under a high pressure, a hot air in the primary combustion chamber 8 is sucked in through a suction port 19 and injected to the outer flame in the secondary combustion chamber 13 from the injection port 9 under a relatively high speed as a tertiary air so as to perform a combustion.

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