F - Mech Eng,Light,Heat,Weapons – 23 – K
Patent
F - Mech Eng,Light,Heat,Weapons
23
K
110/20
F23K 3/00 (2006.01) F23C 7/00 (2006.01) F23C 9/00 (2006.01) F23D 1/00 (2006.01)
Patent
CA 1224089
A B S T R A C T A process and a means is described for burning solid fuels, preferably coal, in pulverised form mixed with a carrier liquid, such as water and/or oil or the like, to thereby form an emulsion. The fuel emulsion is injected through a substantially annular entrance port into a combustion chamber so that an approximately hollow cone-shaped flow configuration is produced. Within this flow configuration, a low pressure zone is built up immediately behind the entrance port for the fuel emulsion opening into the combustion chamber, so that a portion of the hot combustion gases and some unburnt fuel particles are recirculated to the entrance port. Furthermore, gas entrance ports are provided in the end wall of the combustion chamber, through which the gas or air flows along a concentrical and spiral flow path towards the axis of the entrance port for the fuel emulsion opening into the combustion chamber. In this way, the fuel emulsion injected into the combustion chamber is set in rotation, whereby the hollow cone-shaped flow configuration is fanned out or expanded to a bell-shaped or apple-shaped configuration. This feature provides for an extremely long particle path in the shortest possible distance along the middle axis of the combustion chamber. Practically complete combustion is ensured within an extremely short combustion chamber.
445476
Johnson & Hicks
Stubinen Utveckling Ab
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