Method of operating a plant with staged combustion

Details Method of operating a plant with staged combustion Method of operating a plant with staged combustion

Filed on

1996-05-28

Date issued

1999-07-06

Examiner

Thorpe, Timothy S.

Patent Class

Power plants

SubClass

Combustion products used as motive fluid

Other Related Categories

60737, 60746, 431 8, F02C 100, F23R 334

Type

Patent

Status

active

Patent number

059184574

Description

ABSTRACT:
In a method of operating a plant with staged combustion, the first combustion stage (1a) is operated with a fuel/air mixture (3) whose air coefficient is larger than the overall air coefficient of the combustion system. The hot combustion gases (5) from the first combustion stage (1a) are mixed with an additional fuel/air mixture (4) whose air coefficient is smaller than the overall air coefficient of the combustion system, before the further combustion in the second stage (2a) takes place. Since hot-gas backmixing is no longer required in the second stage (2a) for the flame stabilization, this combined mixture burns without the formation of further NOx emissions.

REFERENCES:
Kolb T., Sybon, G.: No x--Emissionsminderung durch dreistufige Berbrennung: Optimerung der Reduktionsstufe. In: BWK, Bd. 44, 1992, Nr. 11, Nov.,, S.481-484.

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