F - Mech Eng,Light,Heat,Weapons – 23 – H
Patent
F - Mech Eng,Light,Heat,Weapons
23
H
110/91
F23H 11/00 (2006.01) F23J 1/00 (2006.01)
Patent
CA 1239834
ABSTRACT OF DISCLOSURE The invention refers to a method and a device for firing solid fuels, substantially in the form of lumps or pieces, in a furnace having a combustion chamber with a substantially horizontal bottom, upon which is maintained a fuel bed with relatively great thickness while supplying fuel within the very bed, through which bed primary com- bustion air is fed from below through mutually spaced primary air passages in the combustion chamber bottom, the combustion gas which leaves said chamber furthermore being subjected to a subsequent secondary combustion in a second- ary combustion chamber after addition of secondary com- bustion air. In order to provide for a mechanical removal of ash the invention suggests that the fuel is supplied into the bed positively and intermittently at a position on an end wall of said combustion chamber at a vertical height spaced above the bottom of the latter but below the upper surface of the fuel bed during operation of the furnace and substantially in horizontal direction, whereby at each occasion newly supplied fuel provides an agitation of the bed such that a concentrated combustion zone is obtained at the upper portion of the bed, while finally combusted fuel in the form of ash is progressively moved towards the opposite end wall of the combustion chamber and downwards and along the combustion chamber bottom, wherefrom the ash is removed in horizontal direction during furnace operation.
466131
Asplund Frank
Jantze Ulrika
Energiutveckling Frank Asplund Ab
Robic Robic & Associes/associates
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