EP3714097A1 - Steuerung der faserstoffbehandlung - Google Patents
Steuerung der faserstoffbehandlungInfo
- Publication number
- EP3714097A1 EP3714097A1 EP18786284.2A EP18786284A EP3714097A1 EP 3714097 A1 EP3714097 A1 EP 3714097A1 EP 18786284 A EP18786284 A EP 18786284A EP 3714097 A1 EP3714097 A1 EP 3714097A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- treatment
- base plate
- pulp
- axial force
- gap
- 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
- 239000002657 fibrous material Substances 0.000 title claims abstract description 8
- 238000000034 method Methods 0.000 claims abstract description 11
- 238000006073 displacement reaction Methods 0.000 claims abstract description 6
- 238000000227 grinding Methods 0.000 claims description 14
- 239000000835 fiber Substances 0.000 claims description 9
- 230000001105 regulatory effect Effects 0.000 claims description 4
- 206010061592 cardiac fibrillation Diseases 0.000 claims description 2
- 230000001276 controlling effect Effects 0.000 claims description 2
- 230000002600 fibrillogenic effect Effects 0.000 claims description 2
- 230000000875 corresponding effect Effects 0.000 description 7
- 239000000725 suspension Substances 0.000 description 3
- 238000007670 refining Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000010893 paper waste Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
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
- 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
- D21D1/002—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
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
- D21G9/00—Other accessories for paper-making machines
- D21G9/0009—Paper-making control systems
- D21G9/0018—Paper-making control systems controlling the stock preparation
Definitions
- the invention relates to a method for controlling or regulating a device for treating pulp based at least in part on it
- the device has a housing in which at least a first treatment tool and a second treatment tool is arranged, the treatment tools are each mounted on a base plate, have a rotationally symmetrical shape, are arranged coaxially to each other, rotate relative to each other about a common axis and a treatment gap boundary through which the fibrous material flows whose gap width can be changed by an axial displacement of at least one base plate of a treatment tool.
- the invention also relates to a device for treating pulp with a housing in which at least a first treatment tool and a second treatment tool is arranged, the treatment tools are each mounted on a base plate, have a rotationally symmetrical shape, are arranged coaxially to each other, relative to each other rotate a common axis and limit a flow-through by the pulp treatment gap whose gap width is variable by means of an actuator via an axial displacement of at least one base plate of a treatment tool, in particular for carrying out the method. Due to the relatively high consistency that the pulp has in the treatment, an intensive mechanical processing in such devices is possible, although the relatively movable treatment tools do not touch, but rather pass each other at a small distance. There are quite considerable forces.
- Devices of the type mentioned above are z. B. used to improve the quality of pulp, TMP or pulp. It has long been known to mill pulp fibers, ie fresh pulp and / or waste paper fibers, in order to be able to achieve the desired properties, in particular with regard to strength, porosity, formation and surface, in the pulp web produced therefrom.
- the refiners, dispersers and de-stamers used in pulp preparation are formed by the relatively fast wear of interchangeable sets screwed to the corresponding base plate.
- the grinding sets must be optimally adapted to the pulp to be treated, also to prevent excessive wear of the sets.
- the optimal use of the available treatment area is aimed at increasing the efficiency of the fiber treatment.
- the object of the invention is to enable as simple as possible a safe and efficient operation of these devices.
- this object is achieved in that the axial force acting on the displaceable base plate is measured and the width of the treatment gap is controlled or regulated at least as a function of drive power and axial force.
- the flow of pulp suspension in the treatment gap is substantially in the radial direction, but due to the rotation, there is also a directional component in the direction of rotation and in the case of a conical arrangement of the treatment tools in the axial direction.
- the gap width is adjusted so that there is a corresponding optimal to the treated pulp axial force.
- the optimum axial force can be determined for a specific pulp during operation by changing the gap width, measuring the axial force and measuring the effects on the parameters of the pulp after the treatment.
- a reduced gap width results in increased fiber elongation and an increased nip width for increased fibrillation of the pulp. Furthermore, during a change in the ratio between drive power and axial force, a change in the parameter of the pulp can be inferred during ongoing operation of the device. On this basis, the machine control can then make the necessary adjustments.
- the gap width of the device should be readjusted when changing the parameters of the pulp.
- the device is essential that it has a measuring unit for detecting the force acting on the displaceable base plate axial force.
- the invention is particularly suitable for devices which are designed as refiners for grinding or as dispersers for dispersing the pulp.
- treatment tool and base plate can also be made in one piece.
- the measuring unit can be arranged on this shaft and / or between the actuator and the shaft and / or in the actuator.
- the measuring unit can be arranged in the actuator and / or between actuator and base plate.
- the actuators may be designed on a hydraulic, pneumatic, electrical or manual basis. Even with the measuring units can be used on known force gauge.
- the total drive power absorbed by the device is composed of the no-load power and the specific drive power of the device relevant to the desired treatment intensity.
- the pulp 1 is fed directly into the central, i. radially inner region of the refiner set, which of the two treatment tools 3,4
- the other treatment tool 4 is rotatably mounted in the housing 2 of the refiner.
- the treatment tools 3,4 each have a rotationally symmetrical shape, wherein the two annular grinding surfaces are arranged parallel to each other and the gap distance between them via an axial displacement of the non-rotating treatment tool 3 is adjustable.
- the rotating grinding surface is here moved by a rotatably mounted in the housing 2 shaft 10 in the direction of rotation.
- This shaft 10 is driven by a drive also present in the housing 2.
- the fiber suspension 1 to be ground passes via 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 cooperating grinding surfaces radially outwards and leaves the adjoining annular space through a drain.
- Both grinding surfaces are each formed by a plurality of grinding plates, which extend over in each case a peripheral segment of the corresponding grinding surface.
- the grinding plates result in a continuous grinding surface.
- the refining plates and thus also the refining surfaces are generally formed by a plurality of substantially radially extending grinding bars 9 and intermediate grooves.
- the treatment tools 3,4 are mounted on corresponding base plates 7,8.
- the treatment gap 6 can not only be perpendicular but, as in the case of cone refiners, also inclined to the axis of rotation 5.
- the axial position of the non-rotating treatment tool 3 is variable via an actuator 11, for example in the form of a Spindelhubianas, which has a corresponding effect on the width of the treatment gap 6 and the pressure conditions in this invention is essential that the actuator 11 directly to the sliding base plate.
- 7 acting axial force F measured by a measuring unit 12 for example in the form of a arranged between the actuator 11 and the base plate 7 pressure cell and the gap width between the
- Treatment tools 3,4 is controlled at least in dependence on drive power and axial force F.
- the milling performance is essentially determined by the specific drive power of the device.
- the width of the treatment gap 6 is adjusted so that a corresponding to the treated pulp 1 and the desired parameters of the pulp 1 after the treatment corresponding optimal axial force F results.
- the machine control can preferably measure the parameters of the pulp or of the fibrous web produced therefrom online and change the axial force F until an optimum value has been established in the parameters. If, after this optimization, a change in the ratio between the drive power of the device and the axial force F occurs later in the process, a change in the parameter of the supplied pulp 1 can be deduced. In this case, the width of the treatment gap 6 should be readjusted.
- the rotating base plate 4 can be designed to be axially displaceable.
- the actuator 11 would act on the, connected to the rotating base plate shaft 10 for the purpose of changing the width of the treatment gap 6.
- the measuring unit 12 between shaft 10 and actuator 11 may be arranged.
Landscapes
- Paper (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102017127771.4A DE102017127771A1 (de) | 2017-11-24 | 2017-11-24 | Steuerung der Faserstoffbehandlung |
PCT/EP2018/077700 WO2019101425A1 (de) | 2017-11-24 | 2018-10-11 | Steuerung der faserstoffbehandlung |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3714097A1 true EP3714097A1 (de) | 2020-09-30 |
EP3714097B1 EP3714097B1 (de) | 2024-07-03 |
Family
ID=63857919
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP18786284.2A Active EP3714097B1 (de) | 2017-11-24 | 2018-10-11 | Steuerung der faserstoffbehandlung |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP3714097B1 (de) |
CN (1) | CN111373090B (de) |
DE (1) | DE102017127771A1 (de) |
FI (1) | FI3714097T3 (de) |
WO (1) | WO2019101425A1 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102020122645A1 (de) | 2020-08-31 | 2022-03-03 | Voith Patent Gmbh | Steuerung einer Faserbehandlungsvorrichtung |
CN116324083A (zh) * | 2020-09-30 | 2023-06-23 | 福伊特专利有限公司 | 纤维材料处理的控制 |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4184204A (en) | 1978-10-06 | 1980-01-15 | Beloit Corporation | Programmable refiner controller |
US4661911A (en) * | 1985-01-31 | 1987-04-28 | Beloit Corporation | Adaptive constant refiner intensity control |
US4986480A (en) * | 1989-06-29 | 1991-01-22 | Kamyr Ab | Method and apparatus for feeding a conical refiner |
US6324490B1 (en) * | 1999-01-25 | 2001-11-27 | J&L Fiber Services, Inc. | Monitoring system and method for a fiber processing apparatus |
CA2300737C (en) * | 2000-03-15 | 2008-02-19 | Queen's University At Kingston | Refiner force sensor |
US6955309B2 (en) | 2001-03-12 | 2005-10-18 | Norwalk Industrial Components, Llc | Method of diagnosing and controlling a grinding mill for paper and the like |
EP2562307A1 (de) * | 2011-08-26 | 2013-02-27 | Officine Airaghi Srl | Ersatzteile für Scheibenrefiner zur Papierherstellung |
SE537929C2 (sv) * | 2014-02-11 | 2015-11-24 | Daprox Ab | Raffinöranordning och ett förfarande för raffinering av cellulosamaterial |
CN104459089B (zh) * | 2014-12-12 | 2016-05-11 | 东北大学 | 一种高浓磨浆系统游离度的软测量方法 |
-
2017
- 2017-11-24 DE DE102017127771.4A patent/DE102017127771A1/de active Pending
-
2018
- 2018-10-11 EP EP18786284.2A patent/EP3714097B1/de active Active
- 2018-10-11 FI FIEP18786284.2T patent/FI3714097T3/fi active
- 2018-10-11 WO PCT/EP2018/077700 patent/WO2019101425A1/de unknown
- 2018-10-11 CN CN201880075427.4A patent/CN111373090B/zh active Active
Also Published As
Publication number | Publication date |
---|---|
DE102017127771A1 (de) | 2019-05-29 |
EP3714097B1 (de) | 2024-07-03 |
FI3714097T3 (fi) | 2024-10-02 |
CN111373090B (zh) | 2022-04-29 |
CN111373090A (zh) | 2020-07-03 |
WO2019101425A1 (de) | 2019-05-31 |
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