Heating – Tumbler-type rotary - drum furnace – Having combustion products generated in or fed to drum
Patent
1985-01-11
1986-02-04
Yuen, Henry C.
Heating
Tumbler-type rotary - drum furnace
Having combustion products generated in or fed to drum
432 14, 106100, F27B 708
Patent
active
045682763
ABSTRACT:
A dust preheating system with an incipient calcinating furnace for powdery material, including a combustion furnace, a clinker cooler located on a downstream side of the combustion furnace, a preheater having a plurality of dust separators connected in series in a vertical direction to form a corresponding number of preheating stages, an incipient calcination furnace located between said preheater and said combustion furnace when seen in a flow direction of said powdery material and connected through a combustion air duct to the clinker cooler, the incipient calcination furnace including an independent fuel feeder and connected through a combustion gas duct to a lowermost dust separator of the plurality of dust separators for calcined material, a second lowest dust separator of the preheater having a dust outlet thereof connected to the incipent calcination furnace, and the lowermost dust separator having a calcined dust outlet connected to an inlet of the combustion furnace, wherein the second lowest dust separator includes a cyclone separator provided with an opening in a side wall thereof and having a fine dust outlet in a lower portion thereof, and a coarse dust separating pocket hermetically connected to the opening and having a coarse dust outlet in a lower portion thereof and a mechanism connecting the fine and coarse dust outlets to fine and coarse dust feed ports provided at spaced portions in a side wall of the incipient calcination furnace.
REFERENCES:
patent: 3881861 (1975-05-01), Ritzmann
patent: 3881862 (1975-05-01), Nishida et al.
patent: 4326845 (1982-04-01), Hess
patent: 4402667 (1983-09-01), Goldmann
patent: 4427377 (1984-01-01), Dambrine et al.
patent: 4470849 (1984-09-01), Abelitis et al.
Kabushiki Kaisha Kobe Seiko Sho
Yuen Henry C.
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