SE7711885L - PROCEDURE AND DEVICE FOR DETERMINING WOOD LEVEL IN A MASS COOKER - Google Patents
PROCEDURE AND DEVICE FOR DETERMINING WOOD LEVEL IN A MASS COOKERInfo
- Publication number
- SE7711885L SE7711885L SE7711885A SE7711885A SE7711885L SE 7711885 L SE7711885 L SE 7711885L SE 7711885 A SE7711885 A SE 7711885A SE 7711885 A SE7711885 A SE 7711885A SE 7711885 L SE7711885 L SE 7711885L
- Authority
- SE
- Sweden
- Prior art keywords
- digester
- chip level
- temperature
- chip
- location
- 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
- D21C7/12—Devices for regulating or controlling
Landscapes
- Paper (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Abstract
METHOD AND APPARATUS FOR DETERMINING THE LOCATION OF THE CHIP LEVEL IN A PULPING DIGESTER A pulping digester contains a liquid digesting medium and wood chips dispersed in the medium. The level of the wood chips in the digester is normally below the top of the digester. As chips and digesting medium are fed to the digester and as pulp and digesting medium are withdrawn from the digester, the chip level will vary dependent upon the net addition of chips and withdrawal of pulp. The variable location of the chip level, or chip height, is determined by positioning a temperature sensing means in the upper portion of the digester above the normally desired chip level. The temperature sensed by the sensing means is displayed to and monitored by the digester operator. As the chip level rises toward the temperature sensor, the sensed temperature will fall until the chip level rises above the location of the temperature sensor, after which the sensed temperature will rapidly increase as the chip level continues to rise above the location of the sensing means. The inverse relationship is true as the chip level falls, providing a characteristic curve of temperature versus chip level from which the chip height can be determined.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US73543776A | 1976-10-26 | 1976-10-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SE7711885L true SE7711885L (en) | 1978-04-27 |
Family
ID=24955798
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SE7711885A SE7711885L (en) | 1976-10-26 | 1977-10-21 | PROCEDURE AND DEVICE FOR DETERMINING WOOD LEVEL IN A MASS COOKER |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JPS5354051A (en) |
| CA (1) | CA1058929A (en) |
| FR (1) | FR2369549A1 (en) |
| SE (1) | SE7711885L (en) |
| ZA (1) | ZA775654B (en) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE897948C (en) * | 1951-12-21 | 1953-11-26 | Kamyr Ab | Method and device for the continuous digestion of fibrous materials |
| US3030809A (en) * | 1957-09-23 | 1962-04-24 | Westinghouse Electric Corp | Liquid level indicating systems |
| DE2346761A1 (en) * | 1973-09-17 | 1975-03-27 | Juergen Frahm | Sludge level in sedimentation tanks measuring device - with heat conduction of water and sludge measured by four sensor elements |
-
1977
- 1977-09-16 CA CA286,892A patent/CA1058929A/en not_active Expired
- 1977-09-21 ZA ZA00775654A patent/ZA775654B/en unknown
- 1977-10-15 JP JP12398077A patent/JPS5354051A/en active Pending
- 1977-10-21 SE SE7711885A patent/SE7711885L/en not_active Application Discontinuation
- 1977-10-25 FR FR7732070A patent/FR2369549A1/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| CA1058929A (en) | 1979-07-24 |
| JPS5354051A (en) | 1978-05-17 |
| ZA775654B (en) | 1978-09-27 |
| FR2369549A1 (en) | 1978-05-26 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| NAV | Patent application has lapsed |
Ref document number: 7711885-9 |