Drying and gas or vapor contact with solids – Apparatus – With means to treat gas or vapor
Patent
1982-03-09
1984-07-24
Schwartz, Larry I.
Drying and gas or vapor contact with solids
Apparatus
With means to treat gas or vapor
34 10, 34 57B, 34 57D, 34 58, F26B 508
Patent
active
044610939
ABSTRACT:
A method of operating a particle-treating apparatus having a hollow foraminous drum centered on and rotatable about an upright axis comprises the steps of feeding particles into the upper portion of the interior of the drum, rotating the drum about the axis at a speed sufficient to form the particles into an annular body lying on the inner surface of the drum, passing a drying gas radially inward through the drum into the interior thereof and withdrawing the gas axially from the interior to at least partially fluidize the body and dry the particles, and collecting the particles beneath the drum as the body moves off the lower edge thereof. The rate of gas flow through the drum and the rotation rate of the drum are such that the body moves axially down in the interior toward the lower edge of the drum. For a batch of particles the drum rotation speed is low at the start of treatment of the batch but is thereafter increased as the batch forms a continuous such body covering substantially all of the interior of the drum to be relatively high.
REFERENCES:
patent: 2254867 (1941-09-01), Bonotto
patent: 3500552 (1970-03-01), Farkas et al.
patent: 3600817 (1971-08-01), Klein
patent: 4130944 (1978-12-01), Hultsch et al.
Baumgartner Siegfried
Bock Harald
Hultsch Gunther
Schilp Reinhold
Dubno Herbert
Krauss-Maffei Aktiengesellschaft
Ross Karl F.
Schwartz Larry I.
Westphal David W.
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