gravity bed

gravity bed

[′grav·əd·ē ‚bed]
(engineering)
A moving body of solids in which particles (granules, pellets, beads, or briquets) flow downward by gravity through a vessel, while process fluid flows upward; the moving-bed technique is used in blast and shaft furnaces, petroleum catalytic cracking, pellet dryers, and coolers.
Mentioned in ?
References in periodicals archive ?
It then undergoes three stages of fiber separation: first through a Granutech air separation unit, then over a modified vibratory screener and, finally, through a vacuum gravity bed separator/de-stoner.
The final step in the system, a refiner mill with a final pass over an other gravity bed separator, results in clean crumb as small as mesh.