Drying and gas or vapor contact with solids – Apparatus – Gravity flow type
Patent
1978-08-02
1980-04-15
Schwartz, Larry I.
Drying and gas or vapor contact with solids
Apparatus
Gravity flow type
34168, 366102, 366316, F26B 1722
Patent
active
041976606
ABSTRACT:
Polyester granules are crystallized and dried by passing hot gases of 120.degree. to 190.degree. C. in upward direction through the stationary layer of loose polyester granules resting in a cylindrical container on a plane or conical perforated tray slowly rotating about its vertical axis. The hot gas is passed through the material in an amount such that no fluidization is brought about. Under the action of the hot gas the granules agglomerate and the agglomerate is alternately slightly lifted and lowered again by stripping edges on the perforated tray whereby the agglomerate portion resting on the tray is disintegrated and the crystallized granules are discharged through slots behind the stripping edges in the tray.
REFERENCES:
patent: 1634480 (1927-07-01), Wickenden et al.
patent: 2734728 (1956-02-01), Myers
patent: 2853280 (1958-09-01), Cusi
patent: 2984462 (1961-05-01), O'Connor
Breitschaft Siegfried
Holtermann Rolf
Hoechst Aktiengesellschaft
Schwartz Larry I.
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