Furnaces – Process – Burning pulverized fuel
Patent
1979-08-09
1981-02-17
Favors, Edward G.
Furnaces
Process
Burning pulverized fuel
110265, 110302, 110348, 431 10, 431165, 431351, F23D 100
Patent
active
042508207
ABSTRACT:
In order to burn a fuel of low ignition properties and low contents of volatile gases in steam generators: the combustion air is introduced in three batches at three successive places into the firebox. Preferably, the primary air is introduced at a temperature of at least about 500.degree., preferably between 500.degree. and 600.degree. C. so as to effect a pregasification of the fuel. The secondary air is then introduced at a temperature of about 350.degree. to 400.degree. C. to start the combustion of the pregasified fuel and the tertiary air is finally introduced at a temperature of only about 250.degree. to 300.degree. C. in order to complete the combustion. This temperature differentiation of heat ranges then will permit to withdraw theash as a dry discharge.
REFERENCES:
patent: 2569446 (1951-10-01), Bonvillian et al.
patent: 2694991 (1954-11-01), Marquez
patent: 2971480 (1961-02-01), Sage
patent: 3190245 (1965-06-01), Huntington
patent: 4013399 (1977-03-01), Craig et al.
patent: 4060378 (1977-11-01), Peredi
patent: 4193773 (1980-03-01), Staudinger
Favors Edward G.
Striker Michael J.
Vereinigte Kesselwerke AG
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