F - Mech Eng,Light,Heat,Weapons – 23 – C
Patent
F - Mech Eng,Light,Heat,Weapons
23
C
F23C 9/06 (2006.01) F23J 1/02 (2006.01) F23J 3/06 (2006.01)
Patent
CA 2572893
The present invention is about a process for treating all the ashes produced by a coal dust boiler (1), able to reduce the total unburnt matter content, to increase the combustion efficiency of the boiler (1), and to have the light ashes as the only waste arising from the coal combustion. In particular, said process provides for the extraction of the heavy ashes (4) from the boiler bottom (23), the ashes coming from the hoppers of the economizers (5) and the fraction of light ash richer of unburnt matter coming from the filters (11) used to collect the dust from the flue gas; said ashes are mixed in a silo (15), proportioned and transferred in one or more feeders (17) of the coal mills (18), and reintroduced in the boiler (1) after being mixed with the coal through the burners (2).
L'invention concerne un procédé servant à traiter la totalité des cendres produites par une chaudière (1) de poussier de charbon capable de réduire la totalité de la teneur en matières non brûlées, de manière à augmenter l'efficacité de combustion de la chaudière (1) et de limiter les déchets de combustion du charbon aux cendres légères. En particulier, ce procédé consiste à extraire des cendres lourdes (4) du fond (23) de la chaudière, ces cendres provenant des trémies des économiseurs (5) et la fraction de cendre légère plus riche en matières non brûlées provenant des filtres (11) utilisée afin de recueillir la poussière provenant des gaz de combustion. On mélange ensuite ces cendres dans un silo (15), on les conditionne et on les introduit dans un ou plusieurs ensembles d'alimentation (17) des installations charbonnières (18), puis on les réintroduit dans la chaudière (5) après les avoir mélanger au charbon par l'intermédiaire des brûleurs (2).
Magaldi Mario
Sorrenti Rocco
Magaldi Power S.p.a.
Ridout & Maybee Llp
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