SE0101553D0 - Feeding comminuted fibrous material - Google Patents
Feeding comminuted fibrous materialInfo
- Publication number
- SE0101553D0 SE0101553D0 SE0101553A SE0101553A SE0101553D0 SE 0101553 D0 SE0101553 D0 SE 0101553D0 SE 0101553 A SE0101553 A SE 0101553A SE 0101553 A SE0101553 A SE 0101553A SE 0101553 D0 SE0101553 D0 SE 0101553D0
- Authority
- SE
- Sweden
- Prior art keywords
- pumps
- slurry
- fibrous material
- transfer device
- return line
- Prior art date
Links
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C7/00—Digesters
- D21C7/06—Feeding devices
Landscapes
- Paper (AREA)
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 one or more slurry pumps 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. A return line from the top of the digester may, but need not necessarily, be operatively connected to the one or more pumps and if connected to the pumps, the liquid in the return line may be cooled to a temperature at which it will not flash during handling. Recirculation loops may be established associated with one or all of the slurry pumps to facilitate startup. A static flow splitter may be provided to split the flow from the last pump to two or more digesters.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US09/568,984 US6325890B1 (en) | 1996-10-25 | 2000-05-11 | Feeding comminuted fibrous material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| SE0101553D0 true SE0101553D0 (en) | 2001-05-04 |
| SE0101553L SE0101553L (en) | 2001-11-12 |
Family
ID=24273598
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SE0101553A SE0101553L (en) | 2000-05-11 | 2001-05-04 | Arrangement and method for loading cellulosic material |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP2002004187A (en) |
| CA (1) | CA2345762A1 (en) |
| FI (1) | FI20010851A (en) |
| SE (1) | SE0101553L (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2455172C (en) * | 2003-01-30 | 2010-02-23 | Andritz Inc. | Feeding comminuted fibrous material using high pressure screw and centrifugal pumps |
| JP5114629B2 (en) * | 2008-02-06 | 2013-01-09 | サンノプコ株式会社 | Cooking aid for cooking lignocellulosic material and method for producing pulp |
| FI123094B (en) * | 2010-03-18 | 2012-11-15 | Andritz Oy | Apparatus and method for detecting harmful material in a pulping process |
-
2001
- 2001-04-24 FI FI20010851A patent/FI20010851A/en unknown
- 2001-04-26 JP JP2001128940A patent/JP2002004187A/en not_active Withdrawn
- 2001-05-01 CA CA002345762A patent/CA2345762A1/en not_active Abandoned
- 2001-05-04 SE SE0101553A patent/SE0101553L/en not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| SE0101553L (en) | 2001-11-12 |
| FI20010851A (en) | 2001-11-12 |
| JP2002004187A (en) | 2002-01-09 |
| FI20010851A0 (en) | 2001-04-24 |
| CA2345762A1 (en) | 2001-11-11 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| NAV | Patent application has lapsed |