Method of operating a firing installation

Details Method of operating a firing installation Method of operating a firing installation

1995-05-11

1996-08-13

Dority, Carroll B.

Combustion

Process of combustion or burner operation

Flame shaping, or distributing components in combustion zone

431115, F23M 300

Patent

active

055450326

ABSTRACT:
In a firing installation which is designed to minimize the pollutant emissions during the use of both a liquid and a gaseous fuel, an annular chamber (12) is arranged downstream of a first combustion stage (1) on the head side of a second combustion stage (2) arranged downstream. The first combustion stage (1) is operated as a lean stage with a burner (100), while the second combustion stage (2) is operated as a near-stiochiometric stage. The wall of the annular chamber (12) has a number of openings (13) for the inflow of a mixture (14) of recycled flue gas (4) and fuel (15). The combustion air (115) for the burner (100) is likewise a mixture (6) of air (3) and recycled flue gas (4). The hot gases from this first combustion stage (1) are moderated before entering the second combustion stage (2), self-igniting combustion taking place in this second combustion stage (2) starting from the annular chamber (12).

REFERENCES:
patent: 5044935 (1991-09-01), Peter
patent: 5118283 (1992-06-01), Sattelmayer
patent: 5127821 (1992-07-01), Keller
patent: 5201650 (1993-04-01), Johnson
patent: 5423674 (1995-06-01), Knopfel et al.

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