Combustion – Combustion bursts or flare-ups in pulses or serial pattern
Patent
1981-08-14
1984-09-25
Green, Randall L.
Combustion
Combustion bursts or flare-ups in pulses or serial pattern
431284, 431285, 431158, 432 25, F23C 1104, F23Q 900
Patent
active
044733488
ABSTRACT:
The burner for metallurgical furnaces comprises a main combustion chamber (7) and an auxiliary combustion chamber (5) presenting a plurality of outlet channels (6) communicating with the main combustion chamber (7). To the main combustion chamber there is fed in a pulsating manner a primary mix of fuel gas and air in stoichiometric ratio, and, during the intervals between the feed pulses, a secondary mix of fuel gas and air with a coefficient of excess air of 1.15 to 1.35 and at a rate of flow corresponding to 1 to 3% of the nominal rate of flow. To the auxiliary combustion chamber (5) there is instead continuously fed an auxiliary mix of fuel gas and air with a coefficient of excess air of 0.65 to 0.85 and at a rate of flow corresponding to 1 to 3% of the rate of flow of the primary mix. The combustion products of the auxiliary mix stay in the auxiliary combustion chamber (5) for a very short time, more particularly for about from 0.005 to 0.01 sec., so that they still contain, when they enter into the main combustion chamber (7), active chemical substances, and particularly hydrogen atoms and radicals containing hydrogen atoms.
REFERENCES:
patent: 2777508 (1957-01-01), Jurisich
patent: 3115924 (1963-12-01), Massier
patent: 3194295 (1965-07-01), Marchal et al.
patent: 3802827 (1974-04-01), Semenov et al.
patent: 3969069 (1976-07-01), Knaak
Abramovich Gussak L.
Alexandrovich Astafiev A.
Alexandrovich Eletsky S.
Borrello Silvio
Iosifovich Moroz V.
Green Randall L.
Italimpianti Societa Italiana Impianti P.A.
Nauchno-Proizvodstvennoe Obiedinenie Po Tekhnologii Mashinostroe
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