Process and system for the dehydration of residues
US4142971A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 25, 1977 |
| Grant date | Mar 6, 1979 |
| Priority date | — |
| Expiry date | May 25, 1997 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D33/646
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A system for the dehydration of residues such as sludge includes first and second endless filter belts which move at identical speeds in endless paths. A residue to be dehydrated is supplied between the two filter belts which pass together in alteration around a perforated drum and a plurality of rollers. Two of the rollers are positively driven at identical speeds but in opposite directions to thereby drive the two filter belts at identical speeds. Both filter belts are simultaneously and identically tensioned to control the pressure exerted by the filter belts on the residue during passage thereof around the drum and rollers. A supplemental pressing assembly presses the filter belts and residue against the perforated drum at a uniform pressure regardless of the thickness of the residue. The supplemental pressing assembly is simultaneously controlled by the same fluid source which controls the assemblies which tension both of the filter belts.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.