Method and reactor for combustion in a fluidized bed
AssigneeGotaverken Energy Aktiebolag
InventorLars A. Chambert
Life of this patent
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Abstract
A method and a reactor for combustion of solid granular fuel material in a fluid bed by means of primary air supplied to the bottom of said reactor and by secondary air supplied a distance above the reactor bottom, solid granular fuel material which is falling along the boundary side wall of the reactor being collected in at least one pocket arranged in the direction in which the material is falling, a cooling surface being arranged in said pocket.
Claims16
A reactor for combustion of solid granular fuel material in a fluid bed comprising:
- a fluid bed;
- a reactor bottom;
- boundary side walls;
- means for supplying primary air to said reactor bottom;
- and
- means for supplying secondary air at a distance above said reactor bottom, said primary and secondary air dividing said fluid bed in the reactor into a dense primary bed and a less dense secondary bed;
- said reactor having one or more pockets within said boundary side walls, said pockets having upward mouths located not lower than a level of said secondary air supply, and
- said pocket having a cooling surface arranged therein.
A method for combustion of solid granular fuel material in a reactor having a fluid bed, a reactor bottom, and boundary side walls, the method comprising the steps:
- (1) supplying primary air to the reactor bottom;
- (2) supplying secondary air at a distance above the reactor bottom, said primary air and said secondary air dividing the fluid bed of said reactor into a dense primary bed and a less dense secondary bed;
- (3) providing at least one pocket in said boundary side walls of said reactor;
- (4) providing a cooling surface formed in said pocket;
- (5) collecting in said pocket any solid granular fuel material which is falling down in said secondary bed adjacent and within said boundary side walls, collection taking place not lower than a level of said secondary air supply, said pocket having an upward opening arranged in a direction in which said solid granular fuel material is falling;
- and
- (6) conducting away by said cooling surface any heat collected in said solid granular fuel material which collects in said pocket.
A method for combustion of solid granular fuel material in a reactor having a fluid bed, a reactor bottom, and boundary side walls, the method comprising the steps:
- (1) supplying primary air to the reactor bottom;
- (2) supplying secondary air at a distance above the reactor bottom, said primary air and said secondary air dividing the fluid bed of said reactor into a dense primary bed and a less dense secondary bed;
- (3) providing at least one pocket in said boundary side walls of said reactor;
- (4) providing a cooling surface formed in said pocket;
- (5) collecting in said pocket any solid granular fuel material which is falling down in said secondary bed adjacent and within said boundary side walls, collection taking place not lower than a level of said secondary air supply, said pocket having an upward opening arranged in a direction in which said slid granular fuel material is falling;
- (6) conducting away by said cooling surface any heat collected in said solid granular fuel material which collects in said pocket;
- (7) discharging solid fuel material from said pocket through a bottom of said pocket and reintroducing said solid fuel material into the fluid bed in a controlled manner;
- and
- (8) protecting said pocket in case of a sudden service interruption by emptying said solid material through the pocket bottom into the fluid bed resting on the reactor bottom.
A reactor for combustion of solid granular fuel material in a fluid bed comprising:
- a fluid bed;
- a reactor bottom;
- boundary side walls;
- means for supplying primary air to said reactor bottom;
- and
- means for supplying secondary air at a distance above said reactor bottom, said primary and secondary air dividing said fluid bed in the reactor into a dense primary bed and a less dense secondary bed,
- said reactor having one or more pockets within said boundary sidewalls, said pockets having upward mouths located not lower than a level of said secondary air supply, and
- said pocket(s) having a cooling surface arranged therein;
- the reactor further comprising means for discharging solid fuel material from the pocket,
- said pocket being arranged at a high level above the reactor bottom such that the solid fuel material collected in the pocket can be emptied on the reactor bottom.
Dependencies are inferred from the claim text.