Elongated slot dryer for wet particulate material
US4617744A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 24, 1985 |
| Grant date | Oct 21, 1986 |
| Priority date | — |
| Expiry date | Dec 24, 2005 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF26B17/1416
- WIPO fieldChemical engineering
- WIPO sectorChemistry
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.