LOW NOx BURNER - TOYOTA MOTOR CO LTD

Title:

LOW NOx BURNER

Document Type and Number:

WIPO Patent Application WO/1996/002793

Kind Code:

A1

Abstract:

In the combustion using air pre-heated by accumulation type direct heat exchange between an exhaust gas and combustion air by using an accumulator as a heat-exchange medium, the present invention provides a low NOx burner which is effective for reducing NOx not only in a high temperature zone but also in a medium temperature zone, in which the NOx reduction has been difficult conventionally, and has high flame stability. In this low NOx burner, a burner tile (22) having a burner tile expanded diameter portion (23) having a diameter greater than that of an outlet of an air throat (2) for passing the full amount of combustion air is disposed at this outlet, and a fuel nozzle (19) injecting a fuel from this burner tile expanded diameter portion (23) is provided. The flow of combustion air jetted from the air throat (24) generates a negative pressure at the portion of a sub-combustion chamber (25) encompassed by the burner tile expanded diameter portion (23), so that strong re-circulation of the exhaust gas occurs inside a furnace, and a flame stabilizing region (X1), a furnace exhaust gas re-circulation/combustion region (X2) and a gentle combustion region (X3) are formed.

Inventors:

NISHIYAMA TOMOHIKO (JP)
MITANI KAZUHISA (JP)
TANAKA RYOICHI (JP)
MATSUO MAMORU (JP)

Application Number:

PCT/JP1995/001418

Publication Date:

February 01, 1996

Filing Date:

July 17, 1995

Export Citation:

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Assignee:

TOYOTA MOTOR CO LTD (JP)
NIPPON FURNACE KOGYO KK (JP)
NISHIYAMA TOMOHIKO (JP)
MITANI KAZUHISA (JP)
TANAKA RYOICHI (JP)
MATSUO MAMORU (JP)

International Classes:

F23C6/04; F23C9/00; F23C99/00; F23L15/02; F23M5/02; (IPC1-7): F23C11/00; F23L15/02

Foreign References:

JPS57165932U	1982-10-19
JPS63503400A	1988-12-08
JPH05106842A	1993-04-27

Other References: