Feeding comminuted fibrous material using high pressure screw and centrifugal pumps
US6841042B2 · kind B2 · utility
12Cited by
7References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 30, 2003 |
| Grant date | Jan 11, 2005 |
| Priority date | — |
| Expiry date | Jan 30, 2023 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21C7/06
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A system and method for feeding comminuted cellulosic fibrous material such as wood chips to the top of a treatment vessel such as a continuous digester provide enhanced simplicity, operability, and maintainability by eliminating the high pressure transfer device conventionally used in the prior art. Instead of a high pressure transfer device the steamed and slurried chips are pressurized using a single vane slurry pump in series with a centrifugal slurry pump both of which are located at least thirty feet below the top of the treatment vessel and for pressurizing the slurry to a pressure of at least about 10 bar gauge.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.