Drying and gas or vapor contact with solids – Process – With fluid current conveying or suspension of treated material
Patent
1998-06-26
1999-12-14
Bennett, Henry A
Drying and gas or vapor contact with solids
Process
With fluid current conveying or suspension of treated material
34364, 34360, 34191, 432 58, 106743, F26B 308
Patent
active
060001453
ABSTRACT:
A method for the continuous treatment of particulate material, such as cement raw meal, in an apparatus comprising a stationary reactor (6) configured as a conical spouted bed, to which the material is fed and treated in a suspended bed by means of gas which, via a centrally arranged gas inlet (21), is injected at the bottom of the reactor (6) and flows upwards through the reactor (6), and wherefrom the material is discharged via an opening (21) at the bottom of the reactor (6). The dimensions, operating parameters of the reactor (6, 21) or the volumes of the connected apparatuses (8a) are selected and regulated in such a way that during operation the bed pulsates up and down in the reactor (6) at such an amplitude that a quantity of the bed material which corresponds to the quantity of flesh feed material, when the bed is situated in its lowermost position, is brought into a zone (22) in which the gas flow velocity is lower than the minimum velocity required for suspending the bed particles, and thereby drops through the gas flow out of the reactor (6).
REFERENCES:
patent: 4759711 (1988-07-01), Ichiyanagi et al.
patent: 4866858 (1989-09-01), Delano
patent: 4997363 (1991-03-01), Hundebol
patent: 5800610 (1998-09-01), Jons
Database WPI, Section Ch, Week 8521, Derwent Publications Ltd., London, GB; Class J09, AN 85-126786, XP002031491 & SU 1 081 400 A (As Kaza Chem Metal), Mar. 23 1984 (see abstract).
Bennett Henry A
F. L. Smidth & Co. A/S
Wilson Pamela A.
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