CA2595551A1 - Method of refining wood chips or pulp in a high consistency conical disc refiner - Google Patents
Method of refining wood chips or pulp in a high consistency conical disc refiner Download PDFInfo
- Publication number
- CA2595551A1 CA2595551A1 CA002595551A CA2595551A CA2595551A1 CA 2595551 A1 CA2595551 A1 CA 2595551A1 CA 002595551 A CA002595551 A CA 002595551A CA 2595551 A CA2595551 A CA 2595551A CA 2595551 A1 CA2595551 A1 CA 2595551A1
- Authority
- CA
- Canada
- Prior art keywords
- pulp
- consistency
- refining
- refiner
- refining zone
- 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.)
- Granted
Links
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
- D21D1/00—Methods of beating or refining; Beaters of the Hollander type
- D21D1/20—Methods of refining
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
- D21D1/00—Methods of beating or refining; Beaters of the Hollander type
- D21D1/002—Control devices
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
- D21D1/00—Methods of beating or refining; Beaters of the Hollander type
- D21D1/20—Methods of refining
- D21D1/22—Jordans
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
- D21D1/00—Methods of beating or refining; Beaters of the Hollander type
- D21D1/20—Methods of refining
- D21D1/34—Other mills or refiners
- D21D1/38—Other mills or refiners with horizontal shaft
Abstract
A method is proposed for improving pulp quality at high production rates on conical disc refiners. It permits a reduction in refining intensity by enabling fibre residence time to increase by increasing consistency, while avoiding the problem of plate plugging normally associated with high discharge consistency. In practice, inlet consistency is increased by the in-feed dilution, flat zone dilution or both, but without allowing the discharge consistency to rise. Instead, the discharge consistency is controlled at a fixed optimum value by the addition of dilution water within the conical zone.
The result is that residence time is increased, and refining intensity decreased, by raising the consistency in the inner region of the refining zone, while avoiding the plate plugging caused by excessive consistency in the outer region of the refining zone.
The result is that residence time is increased, and refining intensity decreased, by raising the consistency in the inner region of the refining zone, while avoiding the plate plugging caused by excessive consistency in the outer region of the refining zone.
Claims (26)
1. A method of refining wood pulp comprising:
i) providing a conical pulp refiner comprising a refiner housing having a pulp inlet and a pulp outlet with a refining zone therebetween, said refining zone comprising a flat upstream refining zone and a conical downstream refining zone, ii) feeding pulp through said pulp refiner from said pulp inlet to said pulp outlet and refining the pulp in said refining zone, and iii) adding a controlled amount of dilution water to said pulp upstream of said conical refining zone to establish a pulp consistency in said refining zone effective to maintain an acceptable refining intensity for refined pulp quality.
i) providing a conical pulp refiner comprising a refiner housing having a pulp inlet and a pulp outlet with a refining zone therebetween, said refining zone comprising a flat upstream refining zone and a conical downstream refining zone, ii) feeding pulp through said pulp refiner from said pulp inlet to said pulp outlet and refining the pulp in said refining zone, and iii) adding a controlled amount of dilution water to said pulp upstream of said conical refining zone to establish a pulp consistency in said refining zone effective to maintain an acceptable refining intensity for refined pulp quality.
2. A method according to claim 1, wherein said controlled amount of said dilution water controls consistency at the pulp inlet, and said controlled amount is determined from heat and material balance in the refiner.
3. A method of refining wood pulp comprising:
i) providing a conical pulp refiner comprising a refiner housing having a pulp inlet and a pulp outlet with a refining zone therebetween, said refining zone comprising a flat upstream refining zone and a conical downstream refining zone, ii) feeding pulp through said pulp refiner from said pulp inlet to said pulp outlet at a selected production rate, and refining the pulp in said refining zone with discharge of refined pulp of a target consistency at said pulp outlet, and iii) adding a controlled amount of dilution water to said conical refining zone to maintain said target pulp consistency at said pulp outlet.
i) providing a conical pulp refiner comprising a refiner housing having a pulp inlet and a pulp outlet with a refining zone therebetween, said refining zone comprising a flat upstream refining zone and a conical downstream refining zone, ii) feeding pulp through said pulp refiner from said pulp inlet to said pulp outlet at a selected production rate, and refining the pulp in said refining zone with discharge of refined pulp of a target consistency at said pulp outlet, and iii) adding a controlled amount of dilution water to said conical refining zone to maintain said target pulp consistency at said pulp outlet.
4. A method according to claim 3 including monitoring pulp consistency at said pulp outlet and delivering said controlled amount of dilution water therefrom.
5. A method according to claim 4 wherein said monitoring comprises sensing said pulp consistency at said pulp outlet with a consistency sensor.
6. A method according to claim 4 wherein said monitoring comprises evaluating process parameters of the refiner and determining the controlled amount of dilution water from the parameters.
7. A method of refining wood pulp comprising:
a) providing a conical pulp refiner comprising a refiner housing having a pulp inlet and a pulp outlet with a refining zone therebetween, said refining zone comprising a flat, upstream refining zone and a conical, downstream refining zone, b) feeding pulp through said pulp refiner from said pulp inlet to said pulp outlet at a selected production rate, and refining the pulp in said refining zone with discharge of refined pulp of a target consistency at said pulp outlet, c) adding a first controlled amount of dilution water to said pulp upstream of said conical refining zone, in response to loss of water in said pulp, to establish a pulp consistency effective to maintain an acceptable refining intensity for refined pulp quality, relative to said production rate in said refining zone, and d) adding a second controlled amount of dilution water to said conical refining zone, to maintain said target pulp consistency at said pulp outlet.
a) providing a conical pulp refiner comprising a refiner housing having a pulp inlet and a pulp outlet with a refining zone therebetween, said refining zone comprising a flat, upstream refining zone and a conical, downstream refining zone, b) feeding pulp through said pulp refiner from said pulp inlet to said pulp outlet at a selected production rate, and refining the pulp in said refining zone with discharge of refined pulp of a target consistency at said pulp outlet, c) adding a first controlled amount of dilution water to said pulp upstream of said conical refining zone, in response to loss of water in said pulp, to establish a pulp consistency effective to maintain an acceptable refining intensity for refined pulp quality, relative to said production rate in said refining zone, and d) adding a second controlled amount of dilution water to said conical refining zone, to maintain said target pulp consistency at said pulp outlet.
8. A method according to claim 7 wherein said dilution water in step (c) is added at said inlet and at said flat refining zone.
9. A method according to claim 7 or 8 wherein said dilution water in step (d) is added at a plurality of spaced apart points in said conical refining zone.
10. A method according to claim 7, 8 or 9 including a step of monitoring pulp consistency in said conical refining zone, with loss of water during refining in said conical refining zone, and adjusting the addition of dilution water in step (d) in response to the monitoring, to maintain said target pulp consistency.
11. A method according to claim 7, 8, 9 or 10 wherein said first controlled amount of dilution water controls consistency at the pulp inlet, and said controlled amount is determined from heat and material balance in the refiner.
12. A method according to claim 7. 9. 9, 10 or 11 including monitoring pulp consistency at said pulp outlet and determining said second controlled amount of dilution water therefrom.
13. A method according to claim 12 wherein said monitoring comprises sensing said pulp consistency at,said pulp outlet with a consistency sensor.
14. A method according to claim 12 wherein said monitoring comprises evaluating process parameters of the refiner and determining the controlled amount of dilution water from the parameters.
15. A method according to any one of claims 1 to 14 wherein said target pulp consistencies at the inlet and the outlet of the refiner are selected as a function of production rate in accordance with equations (11a) and (11b):
C il= .alpha. infeed prod + .beta. infeed (11a) C BL = .alpha. B L prod + .beta.3B L (11b).
C il= .alpha. infeed prod + .beta. infeed (11a) C BL = .alpha. B L prod + .beta.3B L (11b).
16. A method of operating a conical disk refiner comprising:
monitoring a pulp discharge consistency of the refiner; and controlling the discharge consistency to a desired value by adjustment of the flow rate of dilution water fed to a conical zone of the refiner.
monitoring a pulp discharge consistency of the refiner; and controlling the discharge consistency to a desired value by adjustment of the flow rate of dilution water fed to a conical zone of the refiner.
17. A method of operating a conical disk refiner comprising:
monitoring pulp consistency at an inlet of a refining zone of the refiner; and controlling said pulp consistency to a desired value by adjustment of at least one of:
i) flow rate of infeed dilution water to said refining zone; and ii) flow rate of dilution water to a flat zone of said refining zone.
monitoring pulp consistency at an inlet of a refining zone of the refiner; and controlling said pulp consistency to a desired value by adjustment of at least one of:
i) flow rate of infeed dilution water to said refining zone; and ii) flow rate of dilution water to a flat zone of said refining zone.
18. A method according to claim 16, wherein said discharge consistency is maintained by a consistency control loop which is independent of a control loop for maintaining pulp consistency at an inlet of a refining zone of the refiner.
19. A method according to claim 17, wherein said pulp consistency at said inlet is maintained by a consistency control loop which is independent of a control loop for maintaining discharge pulp consistency of the refiner.
20. A method according to claim 16, wherein a refiner inlet consistency target is adjusted in order to change refining intensity in said refiner.
21. A method according to claim 17, wherein said pulp consistency is adjusted by said controlling in order to change refining intensity in said refiner.
22. A method according to claim 20, wherein the pulp residence time and said refining intensity are adjusted without change in said pulp discharge consistency.
23. A method according to claim 21, wherein pulp residence time and said refining intensity are adjusted without change in said pulp discharge consistency.
24. A method according to claim 17, comprising adjusting said pulp consistency as a function of production rate in accordance with the relationships:
25 C il = .alpha. infeed prod + .beta. infeed (11a) C BL = .alpha.B L prod + .beta.B L (11b) 25. A method according to claim 22, wherein said refining intensity is adjusted as a function of production rate.
26. A method according to claim 25, wherein the refining intensity is decreased with increasing production rate to compensate for loss in pulp quality associated with a high production rate.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US65165305P | 2005-02-11 | 2005-02-11 | |
| US60/651,653 | 2005-02-11 | ||
| PCT/CA2005/000772 WO2006084347A1 (en) | 2005-02-11 | 2005-05-19 | Method of refining wood chips or pulp in a high consistency conical disc refiner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2595551A1 true CA2595551A1 (en) | 2006-08-17 |
| CA2595551C CA2595551C (en) | 2009-12-08 |
Family
ID=36792863
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002595551A Expired - Fee Related CA2595551C (en) | 2005-02-11 | 2005-05-19 | Method of refining wood chips or pulp in a high consistency conical disc refiner |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US7240863B2 (en) |
| EP (1) | EP1856324B1 (en) |
| JP (1) | JP4734347B2 (en) |
| CA (1) | CA2595551C (en) |
| NO (1) | NO338033B1 (en) |
| WO (1) | WO2006084347A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010139049A1 (en) * | 2009-06-01 | 2010-12-09 | Fpinnovations | Method of controlling wood pulp production in a chip refiner |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102005036075A1 (en) * | 2005-08-01 | 2007-02-15 | Voith Patent Gmbh | Process for the production of tissue paper |
| EP2158356A4 (en) * | 2007-05-04 | 2013-07-31 | Quebec Centre Rech Ind | System and method for optimizing lignocellulosic granular matter refining |
| SE0900916A1 (en) * | 2009-07-03 | 2010-12-07 | Anders Karlstroem | Procedure for minimizing the difference between temperature profiles in refiners with two grinding zones |
| SE0901588A1 (en) * | 2009-12-21 | 2011-04-26 | Anders Karlstroem | Procedure for controlling pulp quality from refiners |
| CA2714235C (en) | 2010-04-27 | 2014-01-07 | Centre De Recherche Industrielle Du Quebec | Method and system for stabilizing dry-based density of wood chips to be fed to a chip refining process |
| CN104894668B (en) | 2010-05-11 | 2017-04-12 | Fp创新研究中心 | Cellulose nanofilaments and method to produce same |
| CN103502529B (en) | 2011-01-21 | 2016-08-24 | Fp创新研究中心 | High aspect fibers element nanowire filament and production method thereof |
| CN106056243B (en) * | 2016-05-27 | 2019-06-25 | 东北大学 | A kind of control system and method for high consistency refining system output fiber fractions distribution |
| CN111185287B (en) * | 2020-01-13 | 2021-03-12 | 浙江传超环保科技有限公司 | Rubbing crusher for domestic waste |
Family Cites Families (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA938128A (en) * | 1970-11-27 | 1973-12-11 | Karnis Alkibiadis | Continuous measurement of pulp properties |
| SE407952B (en) * | 1976-01-30 | 1979-04-30 | Defibrator Ab | KIT AND DEVICE FOR GRINDING FIBER-CONTAINING MATERIALS |
| SE409476B (en) * | 1978-02-17 | 1979-08-20 | Sca Development Ab | KIT FOR REFINING LIGNOCELLULOSE-MATERIAL |
| US4342618A (en) * | 1979-05-14 | 1982-08-03 | Alkibiadis Karnis | Method and apparatus on-line monitoring of fibre length of mechanical pumps |
| SE433954B (en) * | 1980-03-25 | 1984-06-25 | Mo Och Domsjoe Ab | PROCEDURES AND DEVICES FOR REDUCING THE PREPARATION OF GRINDING MACHINES FROM WOODWOODS IN STONE GRINDING GROUPS REMOVE AND SPETOR YEAR REGULATION OF THE FREENESS OF THE MASS |
| SE435532B (en) * | 1983-02-22 | 1984-10-01 | Sunds Defibrator | SET AND DEVICE FOR MANUFACTURING FIBER MASS FROM LIGNOCELLULOSALLY MATERIAL |
| US4963229A (en) * | 1985-07-02 | 1990-10-16 | International Paper Company | System and method for continuous measurement of pulp consistency in a blowline of a continuous pulp digester |
| US4626318A (en) * | 1985-07-15 | 1986-12-02 | Kamyr, Inc. | Method of controlling a pulp refiner by measuring freeness and removing the latency from the pulp |
| FI87665B (en) * | 1987-07-15 | 1992-10-30 | Abb Stroemberg Drives Oy | ADJUSTMENT OF ORGANIZATION OF FRAMEWORK FOR REFINING |
| US5039022A (en) * | 1989-09-05 | 1991-08-13 | Kamyr Ab | Refiner element pattern achieving successive compression before impact |
| JPH09176980A (en) * | 1995-12-25 | 1997-07-08 | Maisaabo Kk | Beating apparatus for pulp slurry |
| SE506687C2 (en) * | 1996-04-15 | 1998-02-02 | Anders Karlstroem | Method and apparatus for controlling the grinding process in a refiner |
| NZ507723A (en) * | 1998-05-27 | 2003-04-29 | Pulp Paper Res Inst | Low speed low intensity chip refining |
| US6024308A (en) * | 1998-11-11 | 2000-02-15 | J&L Fiber Services, Inc. | Conically tapered disc-shaped comminution element for a disc refiner |
| US6324490B1 (en) * | 1999-01-25 | 2001-11-27 | J&L Fiber Services, Inc. | Monitoring system and method for a fiber processing apparatus |
| US6314381B1 (en) * | 2000-03-08 | 2001-11-06 | J & L Fiber Services, Inc | Refiner measurement system and method |
| US6752165B2 (en) * | 2000-03-08 | 2004-06-22 | J & L Fiber Services, Inc. | Refiner control method and system |
| US6778936B2 (en) * | 2000-03-08 | 2004-08-17 | J & L Fiber Services, Inc. | Consistency determining method and system |
| US6938843B2 (en) * | 2001-03-06 | 2005-09-06 | J & L Fiber Services, Inc. | Refiner control method and system |
-
2005
- 2005-05-19 CA CA002595551A patent/CA2595551C/en not_active Expired - Fee Related
- 2005-05-19 JP JP2007554401A patent/JP4734347B2/en not_active Expired - Fee Related
- 2005-05-19 EP EP05748544.3A patent/EP1856324B1/en not_active Not-in-force
- 2005-05-19 WO PCT/CA2005/000772 patent/WO2006084347A1/en active Application Filing
- 2005-05-20 US US11/133,306 patent/US7240863B2/en active Active
-
2007
- 2007-09-06 NO NO20074510A patent/NO338033B1/en not_active IP Right Cessation
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010139049A1 (en) * | 2009-06-01 | 2010-12-09 | Fpinnovations | Method of controlling wood pulp production in a chip refiner |
| US8590819B2 (en) | 2009-06-01 | 2013-11-26 | Fpinnovations | Method of controlling wood pulp production in a chip refiner |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2006084347A1 (en) | 2006-08-17 |
| NO20074510L (en) | 2007-11-09 |
| NO338033B1 (en) | 2016-07-25 |
| EP1856324A1 (en) | 2007-11-21 |
| US7240863B2 (en) | 2007-07-10 |
| JP4734347B2 (en) | 2011-07-27 |
| EP1856324A4 (en) | 2011-04-13 |
| EP1856324B1 (en) | 2014-10-01 |
| CA2595551C (en) | 2009-12-08 |
| JP2008530381A (en) | 2008-08-07 |
| US20060180684A1 (en) | 2006-08-17 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |
Effective date: 20220301 |
|
| MKLA | Lapsed |
Effective date: 20200831 |