Method for decreasing energy consumption during refining of fiber material at a reduced grinding frequency while maintaining capacity
US5047118A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 6, 1987 |
| Grant date | Sep 10, 1991 |
| Priority date | — |
| Expiry date | Jul 6, 2007 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21D1/22
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The energy consumption of a cellulosic fibrous material refiner is significantly reduced, while the capacity is maintained by reducing grinding frequency while increasing the retention time and power amplitude (edge bar load). The grinding frequency is maintained between about 200-2,000 Hz, preferably between about 300-900 Hz. The retention time is more than a second, being increased at least about 100 times compared to conventional disk refiners. The power amplitude is at least doubled. Retention time is increased by greatly increasing the retention volume by removing the majority (at least about 90% of the steam at approximately the area that it is generated, minimizing the number of cutting elements, and disposing the grinding surfaces of the refiner so that they define a volume of revolution (e.g. a frusto-conical or cylindrical volume).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.