Elongated slot dryer for wet particulate material

Details Elongated slot dryer for wet particulate material Elongated slot dryer for wet particulate material

1985-12-24

1986-10-21

Camby, John J.

Drying and gas or vapor contact with solids

Apparatus

Gravity flow type

44 10E, 44 10J, 34174, 34177, 34179, 432 62, 432102, F26B 1712, F26B 1112, C10L 500, C21D 970

Patent

active

046177442

ABSTRACT:
An elongated slot dryer is disclosed for drying wet solid particulate material. The slot dryer is constructed in the form of a trench with at least one aperture outlet at the bottom of the trench formed by two non-connecting walls. The wet particulate material (coal) enters through the top and exits through the bottom aperture while countercurrently contacting a drying fluid emitted through perforations situated in a drying fluid access means or conduit located substantially throughout the entire length of the slot dryer. The perforations in the fluid access means or conduit are limited to the bottom one half of the fluid access means relative to the aperture outlet to ensure that drying fluid is passed at first in a downward direction and then gently turns upward to countercurrent contact with the wet descending particles. An underlying conveyor will act to continuously remove the relatively dried particulate material passing through the aperture outlet. The elongated slot dryer provides an extremely efficient use of the drying fluid while eliminating problems of pressure drop throughout the slot trench drying vessel.

REFERENCES:
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patent: 3339287 (1967-09-01), Gray
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patent: 3992784 (1976-11-01), Verschuur et al.
patent: 4043763 (1977-08-01), Norman et al.
patent: 4389796 (1983-06-01), Odman
patent: 4401436 (1983-08-01), Bonnecaze

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