Method for impregnating chips
US7998310B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 21, 2005 |
| Grant date | Aug 16, 2011 |
| Priority date | — |
| Expiry date | Nov 7, 2027 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21C3/00
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A method for the impregnation of untreated chips during the manufacture of chemical pulp. The untreated chips are fed without preceding steam treatment into an impregnation vessel that has an upper part with a first area (A1) and a lower part with a second area (A2) that is larger than the first area (A1) by a factor of at least √{square root over (2)}. The chips establish in the upper part a level of chips that is located at a level (h) above a level of fluid consisting of liquor. The chips after passage of the upper part pass through a transitional part, where an increase in area from the first area (A1) to the second area (A2) takes place, and it is here that the angle of repose of the chips is reduced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.