Apparatus for dewatering waste material by capillary action
US5107757A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Jun 3, 1988 |
| Grant date | Apr 28, 1992 |
| Priority date | — |
| Expiry date | Jun 3, 2008 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB30B9/20
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A method of and apparatus for dewatering a substance which is to be dewatered such as sludge wherein the substance to be dewatered is pressed between a pair of rollers (11, 212) or plate-shaped press members (331) each having its press surface formed from a rigid porous material (6, C, 331) having water absorption and retention properties based on the capillary action; water squeezed from the substance by pressing is permeated into the rigid porous material due to water absorption based on the capillary action or water pressure and the permeated water is retained by virtue of the water retention properties based on the capillary action, thereby dewatering the substance; and the water retained by the rigid porous material is discharged by sending pressurized air to regenerate the capillary tubes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.