EP3914768A1 - Verfahren zur steuerung einer vorrichtung zur behandlung von hochkonsistem faserstoff - Google Patents
Verfahren zur steuerung einer vorrichtung zur behandlung von hochkonsistem faserstoffInfo
- Publication number
- EP3914768A1 EP3914768A1 EP20700457.3A EP20700457A EP3914768A1 EP 3914768 A1 EP3914768 A1 EP 3914768A1 EP 20700457 A EP20700457 A EP 20700457A EP 3914768 A1 EP3914768 A1 EP 3914768A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- treatment
- distance
- base plates
- minimum distance
- treatment tool
- 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
- D21D1/004—Methods of beating or refining including disperging or deflaking
- D21D1/006—Disc mills
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C7/00—Crushing or disintegrating by disc mills
- B02C7/11—Details
- B02C7/14—Adjusting, applying pressure to, or controlling distance between, discs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C7/00—Crushing or disintegrating by disc mills
- B02C7/18—Disc mills specially adapted for grain
- B02C7/186—Adjusting, applying pressure to, or controlling distance between, discs
-
- 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
- D21D1/004—Methods of beating or refining including disperging or deflaking
- D21D1/006—Disc mills
- D21D1/008—Discs
-
- 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
- D21D1/30—Disc mills
-
- 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
- D21D1/30—Disc mills
- D21D1/303—Double disc mills
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C25/00—Control arrangements specially adapted for crushing or disintegrating
Definitions
- the invention relates to a method for controlling a device for treating high-consistency fibrous material with a housing in which a first treatment tool and a second treatment tool are arranged, the treatment tools each being fastened to a base plate, having a rotationally symmetrical shape and being arranged coaxially with one another. rotate relative to one another about a common axis and delimit a treatment gap radially flowed through by the fibrous material, the gap width of which can be changed via an axial displacement of at least one base plate of a treatment tool.
- Devices of the above Kind z. B. used to improve the quality of pulp, TMP or fiber, which was obtained from waste paper.
- paper pulp can be homogenized by dispersion and can thereby be significantly improved.
- a fibrous material which has a dry content between 15 and 35% and has been brought to a temperature which is far above the ambient temperature. It makes sense to heat up when the fiber already has the consistency required for dispersion.
- the grinding sets must be adapted as best as possible to the fiber material to be treated, also to prevent excessive wear of the sets.
- the object of the invention is to enable safe and efficient operation of these devices with the simplest possible means.
- the object was achieved in that, in order to determine the minimum distance between the base plates, the vibrations of the device, in particular on at least one element thereof, are recorded and the distance between the base plates rotating relative to one another is reduced until the frequency and / or the Amplitude and / or the change in frequency and / or the change in the amplitude of the vibrations exceeds a limit value and the distance when the limit value is exceeded is defined as the minimum distance.
- the zero point at which the treatment tools come into contact with one another is usually set when the device is at a standstill. Starting from this Zero point is then defined with a certain safety distance, a minimum distance between the opposite base plates of the treatment tools. However, as the treatment surface of the treatment tools facing the gap increases, the gap between the treatment tools increases. This is accompanied by a reduction in the input drive power and a reduced efficiency of the fiber treatment.
- the inventive solution allows a safe and simple determination of the minimum distance between the base plates with relative rotation of the treatment tools to one another.
- the speed during the determination of the minimum distance between the base plates can often even be in the range of the operating speed.
- the speed during the determination of the minimum distance between the base plates is below the operating speed, preferably below 1,000 revolutions per minute.
- the treatment tools lying opposite approach each other as the distance decreases, which influences the vibration behavior of the treatment device.
- the distance between the base plates rotating relative to one another is reduced until the change in the frequency of the vibrations exceeds a limit value and the distance is defined as the minimum distance if the limit value is exceeded.
- the distance between the base plates can generally be reduced continuously or in steps, preferably in smaller and smaller steps. Although this can be done manually, it should preferably be controlled.
- the distance between the base plates during operation should, however, be set by a predetermined value, which is advantageously between 0.1 and 0.4 mm, above the minimum distance as a safety distance.
- the minimum distance between the base plates should always be determined during commissioning of the device and / or after changing a treatment tool.
- the minimum distance between the base plates should also be determined during operation, preferably at certain time intervals, in particular periodically.
- the treatment gap should be flowed through during the determination of the minimum distance from the fibrous material, with the determination of the minimum distance between the base plates advantageously one or more parameters of the fibrous material, preferably all essential parameters in a given Operating range.
- the essential parameters of the fiber material in this case appear in particular the amount of fiber material flowing through the treatment gap, the electrical power consumption of the treatment device, the temperature and the material density of the fiber material.
- the determination of the minimum distance can be used in particular when starting up or after changing a treatment tool Simplification also takes place when no fiber material flows through the treatment gap.
- the invention also enables a method for detecting the treatment gap width during the operation of a device for the treatment of highly consistent
- the axial change in distance between the base plates is measured starting from the minimum distance and used as a reference for the current treatment gap width.
- the axial change in distance between the base plates can be measured via displacement sensors, in particular inductive displacement sensors.
- Treatment tool is axially displaceable.
- the treatment tool and base plate can also be made in one piece.
- the use of the method according to the invention is particularly advantageous in the case of a disperser, a stripper or a refiner.
- the fibrous material can in particular also be TMP, high-yield pulp, MDF fibrous material, wood chips or the like. Trade substances.
- Figure 1 is a schematic cross section through a disperser
- Figure 3 the change in the distances s of the base plates of the treatment tools over the vibration frequency f.
- the highly consistent paper pulp 1 is pressed directly into the central area of the disperser set, which is formed by the two treatment tools 3, 4.
- a treatment tool 3 While a treatment tool 3 is stationary, i.e. is not rotated and is thus designed as a stator, the other treatment tool 4 is rotatably mounted in the housing 2 of the disperser.
- the disperger set with the stator and the rotor is fed radially on the inside.
- dispersion is brought about by moving teeth 9 relatively close to one another at a relatively high speed and subjecting the fiber material 1 located between them to strong shear forces.
- the fibrous material 1 can be heated beforehand using superheated steam. After the dispersion, the dispersed pulp 1 falls out through the outlet 11.
- the gap 6 between the treatment tools 3, 4 also changes as a result, whereby the performance of the disperser can be controlled in a manner known per se.
- the treatment tools 3, 4 each have a rotationally symmetrical shape.
- FIG. 2 shows a grinding arrangement with a grinding gap 6, which is formed by a stationary, ie non-rotating and coupled to the housing 2 3 and a treatment tool 4 rotating about an axis of rotation 5.
- the two annular grinding surfaces run parallel to one another, the gap distance between them being adjustable via an axial displacement, usually of the non-rotating treatment tool 3.
- the rotating grinding surface is moved in the direction of rotation by a shaft rotatably mounted in the housing 2.
- This shaft is driven by a drive also present in the housing 2.
- the fiber suspension 1 to be ground reaches an inlet through the center into the grinding gap 6 between the grinding surfaces of the two treatment tools 3, 4.
- the fiber suspension 1 passes the interacting grinding surfaces radially outward and leaves the subsequent annular space through a drain.
- Both grinding surfaces are each formed by a plurality of grinding plates, each of which extends over a peripheral segment of the corresponding grinding surface.
- the grinding plates Lined up next to each other in the circumferential direction, the grinding plates form a continuous grinding surface.
- the grinding plates and thus also the grinding surfaces are generally formed by a multiplicity of essentially radially running grinding strips 10 and grooves in between.
- the non-rotating treatment tool 3 is axially displaced and the extent of this axial displacement is measured.
- the rotating treatment tool 4 does not change its axial position. Both versions have in common that the treatment tools 3, 4 are fastened on corresponding base plates 7, 8.
- the treatment gap 6 can not only run vertically but also, as for example in the case of cone refiners, also inclined to the axis of rotation 5.
- the minimum distance SM between the base plates 7, 8 is determined when the corresponding treatment tool 4 is rotated.
- the rotational speed lies during the determination of the minimum distance SM in the range of the operating speed or advantageously below the operating speed, preferably below 1,000 revolutions per minute.
- the minimum distance SM between the base plates should be 7.8 in
- the vibrations are detected via one or more sensors arranged on the housing 2.
- the distance s between the base plates 7, 8 rotating relative to one another is continuously reduced, starting with a relatively large distance, until the change in frequency Af exceeds a limit value.
- the distance s when this limit is exceeded is then defined as the minimum distance SM.
- FIG. 3 illustrates the course of the oscillation frequency f during the reduction in the distance s between the base plates 7, 8.
- the measurement is advantageously carried out in the absence of fibrous material 1.
Landscapes
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Paper (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102019101808.0A DE102019101808A1 (de) | 2019-01-25 | 2019-01-25 | Steuerung der Faserstoffbehandlung |
| PCT/EP2020/050358 WO2020151951A1 (de) | 2019-01-25 | 2020-01-09 | Verfahren zur steuerung einer vorrichtung zur behandlung von hochkonsistem faserstoff |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP3914768A1 true EP3914768A1 (de) | 2021-12-01 |
| EP3914768B1 EP3914768B1 (de) | 2025-08-06 |
| EP3914768C0 EP3914768C0 (de) | 2025-08-06 |
Family
ID=69157849
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP20700457.3A Active EP3914768B1 (de) | 2019-01-25 | 2020-01-09 | Verfahren zur steuerung einer vorrichtung zur behandlung von hochkonsistem faserstoff |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US12043959B2 (de) |
| EP (1) | EP3914768B1 (de) |
| CN (1) | CN113330159B (de) |
| DE (1) | DE102019101808A1 (de) |
| WO (1) | WO2020151951A1 (de) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116324083B (zh) * | 2020-09-30 | 2025-03-28 | 福伊特专利有限公司 | 纤维材料处理的控制 |
| SE546721C2 (en) * | 2022-12-02 | 2025-02-11 | Cellwood Machinery Ab | Gap width monitoring |
Family Cites Families (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1105604A (en) * | 1978-06-07 | 1981-07-21 | James H. Rogers | Method and system for detecting plate clashing in disc refiners |
| US4986480A (en) * | 1989-06-29 | 1991-01-22 | Kamyr Ab | Method and apparatus for feeding a conical refiner |
| CA2130277C (en) * | 1993-08-25 | 2004-03-30 | Bruce James Allison | Automatic refiner load control |
| US6324490B1 (en) * | 1999-01-25 | 2001-11-27 | J&L Fiber Services, Inc. | Monitoring system and method for a fiber processing apparatus |
| DE19914669A1 (de) | 1999-03-31 | 2000-05-18 | Voith Sulzer Papiertech Patent | Verfahren zur Mahlung von hochkonsistentem Faserstoff |
| SE520322C2 (sv) | 2000-03-23 | 2003-06-24 | Daprox Ab | Sätt och anordning för avståndsbestämning mellan en stator och en denna motstående roterande rotor |
| DE10017899A1 (de) | 2000-04-11 | 2001-10-18 | Voith Paper Patent Gmbh | Vorrichtung zur Dispergierung von hochkonsistentem Papierfaserstoff sowie Garnituren für diese Vorrichtung |
| JP2003112069A (ja) * | 2001-10-09 | 2003-04-15 | Mitsubishi Paper Mills Ltd | ダブルディスクリファイナーの制御方法 |
| SE524792C2 (sv) * | 2003-03-24 | 2004-10-05 | Daprox Ab | Sätt och givaranordning för avståndsmätning mellan en stator och en denna motstående rotor |
| US7309036B2 (en) * | 2005-12-05 | 2007-12-18 | Gl&V Management Hungary Kft | Refining member clash control method |
| SE529525C2 (sv) * | 2006-01-16 | 2007-09-04 | Metso Paper Inc | Förfarande och anordning för kontroll av uppriktningen mellan malytor |
| US8342437B2 (en) * | 2009-04-23 | 2013-01-01 | Andritz Inc. | Deflaker plate and methods relating thereto |
| EP2488695B1 (de) * | 2009-10-14 | 2016-09-21 | ABB Research LTD | Verfahren und system zur verfeinerung eines fasermaterials mit verbesserter energieeffizienz und pulpequalität |
| US9145641B2 (en) * | 2012-12-13 | 2015-09-29 | Andritz Inc. | Apparatus for disperser plate and method to refine paper |
| FI128835B (en) * | 2013-05-14 | 2021-01-15 | Upm Kymmene Corp | Method and apparatus for producing nanofibrillar cellulose |
| AT14750U1 (de) * | 2014-05-16 | 2016-05-15 | Voith Patent Gmbh | Vorrichtung zur Faserstoffbehandlung |
| DE102016207726A1 (de) * | 2016-05-04 | 2017-11-09 | Voith Patent Gmbh | Steuerung der Faserstoffbehandlung |
| JP6639014B2 (ja) * | 2016-06-10 | 2020-02-05 | 株式会社神戸製鋼所 | 樹脂ペレタイザ装置 |
-
2019
- 2019-01-25 DE DE102019101808.0A patent/DE102019101808A1/de active Pending
-
2020
- 2020-01-09 EP EP20700457.3A patent/EP3914768B1/de active Active
- 2020-01-09 WO PCT/EP2020/050358 patent/WO2020151951A1/de not_active Ceased
- 2020-01-09 CN CN202080010736.0A patent/CN113330159B/zh active Active
- 2020-01-09 US US17/422,829 patent/US12043959B2/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| DE102019101808A1 (de) | 2020-07-30 |
| CN113330159A (zh) | 2021-08-31 |
| US20220098790A1 (en) | 2022-03-31 |
| WO2020151951A1 (de) | 2020-07-30 |
| CN113330159B (zh) | 2023-01-13 |
| EP3914768B1 (de) | 2025-08-06 |
| US12043959B2 (en) | 2024-07-23 |
| EP3914768C0 (de) | 2025-08-06 |
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