Fluidized bed drying

Details Fluidized bed drying Fluidized bed drying

1978-12-29

1981-01-20

Camby, John J.

Drying and gas or vapor contact with solids

Apparatus

With means to treat gas or vapor

34 32, 34 36, 34 37, 34 57R, F26B 308, F26B 310

Patent

active

042453950

ABSTRACT:
The invention resides in one embodiment in a multiple effect method of and apparatus for drying a solid material containing a vaporizable material which comprises establishing at least first and second fluidized beds containing the solid material in which in at least the first fluidized bed the fluidizing medium is the vaporizable material in vapor form and in which the fluidized beds are heated indirectly, such that vaporizable material is removed from the solid material, the vaporizable material removed from the solid material in the first fluidized bed being used to provide the indirect heating of the second fluidized bed.
The invention resides in another aspect in a method of drying a solid material containing a vaporizable material which comprises establishing a fluidized bed containing the solid material in which the fluidizing medium is the vaporizable material in vapor form and in which the fluidized bed is heated indirectly by vaporizable material in the form of a saturated vapor, such that vaporizable material is removed from the solid material, the removed vaporizable material being fed to a steam generator wherein it is used to produce clean saturated steam by heating the condensate from indirect heating of the fluidized bed.

REFERENCES:
patent: 2629938 (1953-03-01), Montgomery
patent: 3654705 (1972-04-01), Smith et al.
patent: 3751214 (1973-08-01), Wenzel et al.
patent: 3800427 (1974-04-01), Kemmetmueller
patent: 4043049 (1977-08-01), Hedstrom

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