Combustion chamber with multi-stage combustion

Details Combustion chamber with multi-stage combustion Combustion chamber with multi-stage combustion

1995-11-16

1997-07-08

Price, Carl D.

Combustion

Process of combustion or burner operation

Flame shaping, or distributing components in combustion zone

431 8, 431351, 431353, F23C 604

Patent

active

056454104

ABSTRACT:
In a method of operating a multi-stage combustion chamber, having at least one primary burner (110) of the premixing type of construction, the fuel injected via nozzles is intensively mixed with primary combustion air inside a premixing space in advance of the ignition. Secondary combustion air is directed into a secondary combustion space (62) which is arranged downstream of the precombustion space (61). The primary burner (110) is a flame-stabilizing double-cone burner without a mechanical flame retention baffle, which is operated at the lower stability limit. The burnt gas is accelerated between precombustion space (61) and secondary combustion space (62). For the purpose of forming a self-igniting mixture, cooling air from the double-wall combustion-chamber boundary and additional fuel are introduced into the burnt-gas flow leaving the precombustion space.

REFERENCES:
patent: 5158445 (1992-10-01), Khinkis
"Etude d'un bruleur bas NO.sub.x pour chaudiere industrielle", Revue Generale de Thermique, No. 330-331, Jun.-Jul. 1989, pp. 379-384.

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