Coating apparatus – Projection or spray type – Coating moving mass of solid particulate work
Patent
1977-01-21
1979-02-27
Mackey, Robert
Coating apparatus
Projection or spray type
Coating moving mass of solid particulate work
118 24, 118DIG5, 426453, 427212, B05B 1704, B05C 502, B01J 824, A23C 1100
Patent
active
041413164
ABSTRACT:
An apparatus for the treatment of powdery and granular substances, which provides for cooling or heating and/or spraying the substances with liquid or molten addition or treatment elements in a vessel rotationally symmetrical to its vertical axis. The substances to be treated are introduced into a vortex flow at the head of the vessel and then carried along by a substantially axially parallel, downward-moving gas stream and are conducted through a spraying zone in which the liquid or molten elements are sprayed thereon. This flow, after a movement undisturbed over a certain interval, strikes upon a counterflow rising from underneath, the velocity adjustment of which is determined by the sifting effect and/or the staying time. The gases, preferably air, enter the vessel in a tempered state in correspondence to the desired result of the process.
REFERENCES:
patent: 2561394 (1952-07-01), Marshall
patent: 2799241 (1957-07-01), Wurster
patent: 3040439 (1962-06-01), Frost
patent: 3110626 (1963-11-01), Larson et al.
patent: 3196827 (1965-07-01), Wurster et al.
patent: 3385724 (1968-05-01), Grun
patent: 3469562 (1969-09-01), Grun
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