Continuous digester with a bottom scraper equipped with draining apertures
US8647473B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 25, 2011 |
| Grant date | Feb 11, 2014 |
| Priority date | — |
| Expiry date | Jan 25, 2031 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21C9/02
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The continuous digester is for producing pulp from comminuted cellulosic material. The digester has a cone diverter on a bottom scraper arranged in the bottom of the digester for assisting in out feed of pulp produced. The cone diverter of the bottom scraper has an upper inclined surface of the cone diverter with an inclination angle in the range 30±10 degrees in relation to the vertical. In order to improve washing performance in the bottom of the digester, especially for overloaded digesters, the upper inclined surface is equipped with draining apertures in fluid communication with a liquid receiving chamber inside the cone diverter. The liquid receiving chamber is connected via a drainage channel to the exterior of the vessel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.