Fluidized bed carbonization

Distillation: processes – thermolytic – Including burning of vaporized product

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Details

201 28, 201 29, 201 31, 201 37, 202121, 48111, 432 15, 432 58, C10B 4700, C10B 2118, C10B 104, C10J 300

Patent

active

039779475

ABSTRACT:
A continuous process is described whereby particulate woody materials are carbonized in a fluidized bed to form solid and gaseous fuel. The process includes injecting particulate woody materials, on a continuous basis, into a fluidized bed of previously carbonized material. Off-gas from carbonization with entrained charcoal fines is continuously removed from above the bed, and coarse charcoal is continuously removed from the surface of the bed. If desired, a high ash, coarse fraction may also be continuously removed from immediately above the bed grid. The off-gas and entrained fine charcoal are separated in a cyclone system, and the charcoal fines with the coarse charcoal fraction from the bed surface are collected for use as solid fuel. Off-gas from the separator may be scrubbed, if desired, or utilized directly as an enriched gaseous fuel. Alternate embodiments of the apparatus of this invention include an oval-shaped bed, or a toroidal bed with a plurality of feeders disposed at preselected positions extending into the bed to maximize the efficiency of the bed.

REFERENCES:
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patent: 2537153 (1951-01-01), Nelson et al.
patent: 2715018 (1955-08-01), Lapple et al.
patent: 2871004 (1959-01-01), Gorin
patent: 3040439 (1962-06-01), Frost
patent: 3436314 (1969-04-01), Leonor
patent: 3660245 (1972-05-01), Zelnik et al.
patent: 3723395 (1973-03-01), Warzell

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