Method and apparatus for mechanical defibration of wood
US7819149B2 · kind B2 · utility
1Cited by
7References
9Claims
0Family size
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Inventors
Key dates
| Filing date | Jun 5, 2006 |
| Grant date | Oct 26, 2010 |
| Priority date | — |
| Expiry date | May 30, 2029 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB24D5/00
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
The present invention provides a novel method and apparatus for producing pulp from lignocellulosic raw material, such as wood or annual or perennial plants, by mechanical defibration. According to the invention, fibers are peeled from the wood by means of grinding grits arranged on a defibration surface, wherein at least 90% of the protrusion difference distribution between adjacent or neighboring grits on the surface belongs to a value region maximally as wide as the average grit diameter. By means of the invention, a reduction in specific energy consumption of up to 50% or even more can be obtained.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.