Thermal reactor of fluidizing bed type
AssigneeEbara Corporation
InventorsHideo Ishihara, Takahiro Ohshita, Harumitsu Saito
Life of this patent
Estimating the term…
Abstract
A fluidized bed type thermal reactor having a furnace housing wherein there is substantially no partition wall and adapted to generate a downwardly descending moving bed portion and whirling fluidized bed portions at opposite lateral sides of the moving bed, respectively, whereby pre-shredding or crushing of material to be charged into the furnace is made substantially unnecessary. The reactor is provided with a unique feeder for charging the material so that the incombustible items the size of which is not suitable to be charged into the furnace are rejected by reversing the feeding direction of the feeder when the presence of such items is sensed.
Claims15
A thermal reactor of the fluidized bed type, comprising:
- a vertical furnace housing having a generally rectangular horizontal cross-section;
- a diffusion means disposed in the lower portion of the inside of said housing and extending from one side wall to the opposite side wall of said housing, said diffusion means having a plurality of gas discharging means spaced across the width of the inside of said housing for discharging fluidizing gas upwardly into said housing, a pressurized fluiding gas source, and gas distributing means coupled between said gas source and said gas discharging means for supplying a greater mass flow of fluidizing gas to the gas discharging means adjacent the opposite side walls than that at the center portion of the width of the inside of said housing for producing a central fluidized bed of fluidized medium above said center portion and side fluidized beds of fluidized medium on opposite sides of said center fluidized bed adjacent said walls, said side fluidized beds whirling adjacent said side walls and moving upwardly and said central fluidized bed generally tending to descend between said two upwardly moving side fluidized beds, the top of said diffusion means being a single inverted V-shape cross-section member having the opposite lower ends adjacent said side walls;
- a material charging means operatively associated with said housing for charging material to be processed into said housing onto the top portion of said central fluidized bed;
- two deflecting means, one on each of the opposite side walls of said housing and extending inwardly toward each other with a gap between the inner ends thereof above the top of said central fluidized bed, the lower surfaces of said deflecting means being upwardly and inwardly inclined into said housing for deflecting the upward flow of said side fluidized beds toward the portion of said housing above said central fluidized bed, the space from the top of said diffusion means up to said two deflecting means and between the opposite side walls being clear of any obstructions to flow in the direction between said opposite side walls whereby said central fluidized bed and said side fluidized beds can contact each other freely;
- and
- discharge means in the bottom part of said furnace housing for discharging incombustible residue from said furnace housing.
Dependencies are inferred from the claim text.