F - Mech Eng,Light,Heat,Weapons – 23 – L
Patent
F - Mech Eng,Light,Heat,Weapons
23
L
F23L 9/02 (2006.01) F23G 5/027 (2006.01) F23G 7/10 (2006.01) F23L 1/00 (2006.01) F23L 9/06 (2006.01)
Patent
CA 2336951
A boiler and a method of firing in a boiler, in which loosely stacked fuel (6) is charged through a charging opening (5) onto a first grate (7) and is there exposed to jets (25) of ignition air that entrain hot flue gas from the combustion chamber, directed at the surface of the fuel, the surface layer of which is ignited and partially gasified before the fuel is finally combusted on a second grate (9) located lower down. To obtain improved adjustment of the combustion with reduced sintering of the ash and a reduced content of nitrogen oxide in the flue gas, it is proposed that the air from the ignition air jets (25) together with the entrained flue gas is permitted to pass through the loosely stacked fuel (6) and the first grate (7) and then to flow into the combustion chamber (1).
La présente invention concerne une chaudière ainsi qu'un procédé d'allumage de chaudière. En l'occurrence, on charge sur un premier support (7) via un orifice de chargement (5) un combustible non tassé (6). On envoie sur ce combustible, en direction de la surface du carneau, des jets (25) d'air d'allumage qui entraînent du gaz de carneau venant du foyer. La couche supérieure mise à feu se gazéifie partiellement avant que le combustible se consume finalement sur une grille (9) inférieure. Pour une bonne combustion donnant lieu à un faible frittage des cendres et à de faibles teneurs des gaz de carneau en oxyde d'azote, l'invention consiste à faire passer l'air des jets d'air d'allumage (25) avec les gaz de carneau qu'ils entraînent dans le combustible non tassé (6) et dans le premier support (7) avant d'arriver dans le foyer (1).
Bioener Aps
Fls Miljo A/s
Gowling Lafleur Henderson Llp
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