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US 4,568,258 AGranted
Apparatus for particulating materials
AssigneePhillips Petroleum Company
InventorE. Webb Henderson
Life of this patent
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Abstract
An apparatus for drying pellets of particulate material such as carbon black is characterized by a columnar drying vessel containing inclined trays or screens positioned so that the pellets or particulates roll from screen to screen down the column. Preferably, the pellets are subjected to countercurrent flow of drying gases while flowing down the screens. In other aspects, carbon black is pelleted with a nonaqueous liquid pelleting fluid and dried with vapors of the same pelleting fluid.
Claims6
Apparatus comprising
- (a) a columnar vessel having a longitudinal axis, an upper end and a lower end;
- (b) a plurality of screens or apertured baffles positioned in the columnar vessel, each of said screens or apertured baffles being inclined with respect to the longitudinal axis and having an upper end and a lower end with the upper end of all but the top screen positioned to receive material from the lower end of the screen or baffle located above it;
- (c) a means for introducing a hot gas into the lower end of the columnar vessel;
- (d) a means for withdrawing a particulate material from the lower end of the columnar vessel;
- (e) a means for introducing a mixture of particulate material and liquid into the upper end of the columnar vessel;
- and
- (f) a means for withdrawing a gas stream from the upper end of the columnar vessel.
4 more elements
Dependencies are inferred from the claim text.