FR2369549A1 - Wood fibre delignification by heating in chamber - and controlling level of wood fibre in dependence on temp measured at fixed point (SW 22.5.78) - Google Patents
Wood fibre delignification by heating in chamber - and controlling level of wood fibre in dependence on temp measured at fixed point (SW 22.5.78)Info
- Publication number
- FR2369549A1 FR2369549A1 FR7732070A FR7732070A FR2369549A1 FR 2369549 A1 FR2369549 A1 FR 2369549A1 FR 7732070 A FR7732070 A FR 7732070A FR 7732070 A FR7732070 A FR 7732070A FR 2369549 A1 FR2369549 A1 FR 2369549A1
- Authority
- FR
- France
- Prior art keywords
- chamber
- wood chips
- wood fibre
- level
- temp
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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
Wood chips are delignified to convert them to paper pulp by being fed by e.g. a feed screw into a treatment chamber contg. a processing liq. The wood chips and processing liq. are heated to produce the pulp which is pref. exhausted via. an outlet at the bottom of the chamber. The temp. of the mixt. in the chamber is continuously monitored at a given point so that if the temp. measured decreases it indicates that the level of the wood chips is falling below the point, whilst if the temp. increases it indicates the level of the wood chips is rising towards this point. The level of the wood chips in the chamber is controlled in dependence on the measured temps. The level of the wood chips can be maintained accurately to ensure correct processing conditions. No mechanical parts are involved, thereby ensuring consistent operation.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US73543776A | 1976-10-26 | 1976-10-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR2369549A1 true FR2369549A1 (en) | 1978-05-26 |
Family
ID=24955798
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR7732070A Pending FR2369549A1 (en) | 1976-10-26 | 1977-10-25 | Wood fibre delignification by heating in chamber - and controlling level of wood fibre in dependence on temp measured at fixed point (SW 22.5.78) |
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) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1074640A (en) * | 1951-12-21 | 1954-10-07 | Kamyr Ab | Reduction digester |
| 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
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1074640A (en) * | 1951-12-21 | 1954-10-07 | Kamyr Ab | Reduction digester |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| SE7711885L (en) | 1978-04-27 |
| CA1058929A (en) | 1979-07-24 |
| JPS5354051A (en) | 1978-05-17 |
| ZA775654B (en) | 1978-09-27 |
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