EP4065763A1 - Vorrichtung und verfahren zur mazeration eines foerderguts - Google Patents
Vorrichtung und verfahren zur mazeration eines foerdergutsInfo
- Publication number
- EP4065763A1 EP4065763A1 EP20758165.3A EP20758165A EP4065763A1 EP 4065763 A1 EP4065763 A1 EP 4065763A1 EP 20758165 A EP20758165 A EP 20758165A EP 4065763 A1 EP4065763 A1 EP 4065763A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- area
- screw
- coil
- conveyed
- worm
- 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
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C1/00—Pretreatment of the finely-divided materials before digesting
- D21C1/10—Physical methods for facilitating impregnation
-
- 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
- D21C7/06—Feeding devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B9/00—Presses specially adapted for particular purposes
- B30B9/02—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material
- B30B9/12—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material using pressing worms or screws co-operating with a permeable casing
- B30B9/124—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material using pressing worms or screws co-operating with a permeable casing using a rotatable and axially movable screw
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B9/00—Presses specially adapted for particular purposes
- B30B9/02—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material
- B30B9/12—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material using pressing worms or screws co-operating with a permeable casing
- B30B9/18—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material using pressing worms or screws co-operating with a permeable casing with means for adjusting the outlet for the solid
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
- D21B1/00—Fibrous raw materials or their mechanical treatment
- D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
- D21B1/12—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by wet methods, by the use of steam
- D21B1/30—Defibrating by other means
- D21B1/34—Kneading or mixing; Pulpers
-
- 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
- D21C1/00—Pretreatment of the finely-divided materials before digesting
Definitions
- the invention relates to a method for maceration of a material to be conveyed, e.g. wood chips, wherein the material to be conveyed is guided over a compression screw, the compression screw receives the material to be transported in an inlet area, a screw rotating in a housing around an axis of rotation conveys the material to be transported to an outlet area and macerates it, wherein the conveyed material is compressed between a coil and the screw to form a gas-tight and liquid-tight plug and the plug seals the outlet area against the compression screw.
- the invention also relates to a device for maceration of material to be conveyed, as specified in the preamble of claim 10.
- Compression screws are used for dewatering a conveyed material by compression, but also for maceration of a conveyed material. Maceration is to be understood as the softening or fraying of the conveyed material, whereby the combined conveying and compression in the compression screw delamination of the cell walls and mechanical defibration of the conveyed material takes place, that is, a comminution of the conveyed material into its fiber components with the creation of a correspondingly larger specific surface of the conveyed material.
- the compression screw also allows a pressure seal between the compression screw and a device connected to the outlet area, such as a reactor, since the conveyed material is formed into a gas-tight and liquid-tight plug between the inlet area and the outlet area.
- the connected device for example the reactor, is filled with a gaseous or liquid fluid which contains reactants and requires that it be sealed off from the environment.
- the device connected to the outlet area of the compression screw can be designed, for example, as a pressure vessel, as a reactor operated at atmospheric or under pressure, as a digester, or in some other way.
- Reactant means, in particular, chemicals in a liquid fluid (e.g. a solvent, an aqueous solution, ethanol or similar mixtures), the term chemical e.g. a catalyst, an acid (e.g. H2SO4 or acetic acid), an alkali (e.g. NaOH) or includes similar mixtures.
- Typical applications for this can be found in the paper and pulp sector, as well as generally in the processing of fiber materials, e.g. Wood fibers, and there for example in the production of fiber boards, MDF, etc.
- fiber materials e.g. Wood fibers
- MDF fiber boards
- an important field of application is the impregnation of the conveyed goods, whereby the compression screw expels air and liquid from the conveyed goods and maceration of the material to be conveyed, the macerated material to be conveyed being guided out of the compression screw into a reactor which has the reactants required for the impregnation.
- biofuels where, for example, bio-ethanol can be produced from biomass, including grain, corn or sugar beet.
- Compression screws typically include a housing and a screw that is rotatably arranged inside about an axis of rotation, the screw at least partially having a helix and the conveyed material being increasingly compressed in the tapered area between the housing and the screw.
- the screw for forming the plug is at least partially helical-free.
- the housing can have openings in the area of the screw in order to allow drainage and / or ventilation of the conveyed material by compression.
- Conventional compression screws can be designed with a cylindrical housing together with a screw with a cylindrical outer contour, other housing shapes, e.g. with a conical outer contour, are also possible.
- EP 2817449 B1 describes a system for handling a wood-free plant material, compression screws being used to feed stoves with wood chips and the compression screw comprising a coil (“plug pipe”) with a constant inner diameter at the end of the compression screw.
- One of the aims of EP 2817449 B1 is to disclose a compression screw arrangement which has an optimized pressure seal. This is achieved through the interaction of a compression screw conveyor and a forced feed screw.
- DE 1 101 126 B describes a method and a device for impregnating cellulose-containing raw materials, the material being progressively compressed for the purpose of expelling air and liquid and the material being in direct contact with the impregnating liquid during expansion is brought. It is also stated that the material which has been comminuted into its fiber components advantageously has a larger surface for the subsequent application of the impregnating material.
- EP 3333311 B1 describes a method and a device for impregnating biomass.
- An improved maceration is to be achieved, among other things, that the biomass of the compression screw is pre-compressed via a "force-feed screw", since it was recognized that a pre-compression of the voluminous, hollow biomass leads to a stronger compression of the plug. It was also found that a determination of the fill level of the reactor unit as a function of the speed at which the biomass is conveyed is advantageous in order to allow homogeneous impregnation of the biomass.
- EP 0493422 B1 relates to a plug screw feeder for use in the maceration of wood chips, with a variable speed screw and a variable speed positive screw, the speed setting of the screw and the positive screw being used to obtain a desired amount of fiber displacement .
- the aim of the invention is an improved possibility of maceration of a conveyed material, in particular a fibrous material.
- the aim is also to allow a better and more uniform action of reactants on the macerated pulp.
- the aim is also to enable optimized dewatering or to regulate the influence of an inhomogeneous conveyed material that is fed unevenly to the compression screw, for example, or that has highly variable good properties, while adhering to the required maceration.
- the aim is to be able to continue setting the maceration even when the screw or the coil is worn, or to minimize the power consumption of the compression screw while maintaining the maceration requirement.
- the degree of maceration of the conveyed material is regulated by positioning the screw relative to the coil.
- the coil (“plug pipe”) is arranged in the outlet area of the compression screw in the housing and has an at least partially ring-shaped and / or at least partially frustoconical structure.
- the snail extends up into the spool, wherein the worm is arranged to be rotatable about an axis of rotation and the worm has a helical-free area within the spool for the formation of the plug.
- the coil can be exchanged because it can be exchanged easily when it is worn, or because different geometries can be formed by exchanging the coil.
- the relative positioning of the worm to the bobbin allows the area between the bobbin and the worm to be influenced. In this way, the area between the coil and the worm and in particular the gap at the end of the worm towards the coil can either be narrowed or widened. By narrowing the area or the gap, the maceration of the material to be conveyed is increased, and by widening the area or the gap, the maceration of the material to be conveyed is reduced.
- a favorable embodiment of the invention is characterized in that, in order to regulate the degree of maceration, the screw is displaced axially along the axis of rotation in the housing.
- the housing and coil are stationary and the worm is axially displaced, whereby the area between the coil and the worm and in particular the gap at the end of the worm towards the coil is either further narrowed or widened.
- a displacement of the screw can be realized in that the bearing unit of the screw is designed to be displaceable, the bearing unit receiving the shaft of the screw and being arranged opposite the exit area.
- the worm is driven by a stationary drive, a coupling being implemented between the bearing unit of the worm and the drive, which can absorb the axial displacement of the worm.
- a further advantageous embodiment of the invention is characterized in that, in order to regulate the degree of maceration, the coil is displaced axially along the axis of rotation in the housing.
- the housing and worm are stationary and the coil is axially displaced, as a result of which the area between the coil and the worm and in particular the gap at the end of the worm towards the coil is either narrowed or widened.
- An advantageous embodiment of the invention is characterized in that the conveyed material is conveyed from the outlet area into a reactor, the conveyed material reacts with a reactant in the reactor and the reaction result in the reactor is influenced by regulating the degree of maceration of the conveyed material.
- the Regulation of the degree of maceration of the conveyed material means a regulation of the defibration of the conveyed material, and thus a regulated shredding of the conveyed material into its fiber components as well as implicitly a regulation of the specific surface of the shredded conveyed material - which is most relevant in chemical but also absorptive and adsorptive processes.
- reaction result includes the extent of impregnation, penetration with reactants, the product quality and the yield, respectively, in relation to the conveyed material.
- An advantageous embodiment of the invention is characterized in that the material to be conveyed is compressed between the inlet area and the outlet area between the housing and the at least partially helical screw, the plug being formed in the exit area between the coil and a helical-free area of the screw.
- the worm In the area of the coil, the worm can partially have an area with a helix, this area of the worm with a helix being followed in the conveying direction by the helical-free area of the worm.
- Another advantageous embodiment of the invention is characterized in that the stopper runs through an annular area in the outlet area, the annular area being formed by an area of the coil with a constant inner diameter and by a helical-free area of the worm with a constant outer diameter.
- the plug in particular, is formed in this ring area, the maceration of the conveyed material not yet being regulated in this area.
- the stopper first passes through the ring area for forming the sealing stopper and then a calibration area for setting the maceration.
- An equally advantageous embodiment of the invention is characterized in that the plug passes through a calibration area in the exit area after the ring area, the calibration area either through an area of the coil with an inner diameter that decreases in the conveying direction and through a helical area of the screw with a constant or decreasing outer diameter is formed or the calibration range is formed by a range of Coil is formed with a constant or increasing inside diameter in the conveying direction and by a helical-free area of the screw with an increasing outside diameter. If the calibration area is formed by an area of the coil with a constant inside diameter in the conveying direction and by a helical-free area of the screw with an increasing outside diameter, the bobbin is followed by an area with a diameter that is larger than the constant inside diameter of the bobbin .
- the helical-free area of the worm with the increasing outer diameter can be positioned within the coil or in the area with the diameter which is greater than the constant inner diameter of the coil, whereby positioning between these positions is of course also possible.
- the relative positioning of the bobbin and the worm sets a certain distance between the bobbin and the worm in the calibration area and, in particular, a certain gap at the end of the worm towards the bobbin.
- the calibration range can either be narrowed or expanded through the relative positioning of the bobbin and worm.
- An area of the coil with a decreasing inner diameter can be realized by a conical coil shape - with the imaginary conical tip pointing towards the exit area.
- the helical-free area of the screw is then conical with a constant diameter or with a decreasing outer diameter - the imaginary conical tip again pointing towards the exit area. Due to the relative displacement of the conical surfaces lying one inside the other, the distance from one another and thus also the maceration is directly regulated.
- An area of the coil with an increasing inside diameter can be realized by a conical coil shape - with the imaginary conical tip pointing towards the inlet area.
- the helical-free area of the screw is then conical with an increasing outer diameter, the imaginary conical tip again pointing towards the inlet area.
- the maceration of the material to be conveyed can either be increased by narrowing the calibration range or reduced by widening the calibration range.
- the subject of the invention is also a compression screw for maceration of a conveyed material, for example fluff pulp, according to claim 10.
- An advantageous embodiment of the compression screw is characterized in that the screw is axially displaceable along the axis of rotation and relative to the housing or that the coil is axially displaceable along the axis of rotation and relative to the housing and the screw.
- annular area is advantageously formed between the coil and the worm, the annular area comprising an area of the coil with a constant inner diameter and a helical-free area of the worm with a constant outer diameter.
- An equally advantageous embodiment of the compression screw is characterized in that a calibration area is formed between the coil and the screw, the calibration area either encompassing an area of the coil with an inner diameter that decreases in the conveying direction and a helical-free area of the screw with a constant or decreasing outer diameter, or the calibration area comprises a region of the coil with an internal diameter that is constant or increasing in the conveying direction and a helical region of the screw with an increasing external diameter. If the calibration area is formed by an area of the coil with an internal diameter that is constant in the conveying direction and by a helical-free area of the screw with an increasing external diameter, the coil is followed by an area with a diameter that is greater than the constant internal diameter of the coil .
- the decreasing or increasing area of the worm or the coil can be formed by a conical design of the coil or the worm. According to these designs, the axial positioning of the worm relative to the bobbin allows the calibration range to be reduced or enlarged.
- Fig. 1 shows a compression screw for maceration according to the prior art.
- Fig. 2 shows an embodiment of the compression screw according to the invention with a first relative positioning of the screw to the coil.
- 3 shows an embodiment of the compression screw according to the invention with a second positioning of the screw relative to the coil.
- FIG. 4 shows a further embodiment of the compression screw according to the invention.
- Fig. 1 shows a compression screw for maceration according to the prior art.
- the material to be conveyed is fed to a reactor 1 (not shown) via the inlet region 3 of the compression screw 2, the compression screw 2 having a housing 4, a screw 6 which can be rotated about an axis of rotation 5 and at least partially has a helix 9, an outlet region 7 and a coil 8 having.
- the worm 6 has a helical-free area 10.
- FIG. 2 and 3 show an embodiment of the compression worm according to the invention, FIG. 2 showing a first relative positioning of the worm to the bobbin and FIG. 3 showing a second relative positioning of the worm to the bobbin.
- a screw 6 which is rotatable about an axis of rotation 5 and at least partially has a helix 9 is arranged in a housing 4.
- the screw 6 has a helix-free area 10 within the coil 8, the coil 8 and the helical-free screw 10 forming an annular area 11 and a calibration area 12 following the annular area 11 in the conveying direction of the conveyed material.
- the helical-free area of the screw is designed to be conical with an increasing outer diameter 16, the imaginary conical tip pointing towards the inlet area and the coil 8 having a constant inner diameter in the conveying direction.
- the calibration area is formed by the area of the coil with constant inner diameter and by the helical-free area 16 of the worm with an increasing outer diameter, the coil being followed by an area 15 with a diameter greater than the constant inner diameter of the coil.
- the helical-free area 16 of the worm with the increasing outside diameter is positioned in area 15 with the diameter that is larger than the constant inside diameter of the coil, or in Fig. 3 the helical-free area 16 of the worm with the increasing outside diameter is in the bobbin 8 positioned.
- the maceration of the material to be conveyed can either be enlarged by narrowing the calibration area 12 or by expanding the calibration area 12 be reduced.
- 2 shows the compression screw 2 with a relative positioning of the screw 6 further in the conveying direction of the conveyed material, ie closer to the exit area 7.
- FIG. 3 shows the compression screw 2 with a relative positioning of the screw 6 against the conveying direction of the conveyed material, ie closer to the inlet area 3.
- the calibration area 12 in FIG. 3 is smaller than in FIG. 2, whereby the positioning of the screw 6 in FIG. 3 leads to a more macerated conveyed material and the positioning of the screw 6 in FIG. 2 to a conveyed good with less macerated material to be conveyed.
- the screw 6 being rotatably arranged in a housing 4 and the screw 6 at least partially having a helix 9.
- the screw 6 has a helix-free area 10 within the coil 8, the coil 8 and the helical-free screw 10 forming an annular area 11 and a calibration area 12 following the annular area 11 in the conveying direction of the material to be conveyed.
- the helical-free area 14 of the screw has a conical design with an outer diameter that decreases in the conveying direction, the imaginary conical tip pointing towards the exit area 7, and the coil 8 has an area 13 with a decreasing inner diameter.
- Arrow A illustrates the possibility of positioning the worm 6 relative to the bobbin 8, or arrow B illustrates the possibility of positioning the bobbin 8 relative to the worm 6.
- the present invention thus offers numerous advantages: an effective way of regulating the maceration of a pulp and also a better and more uniform action of reactants on the macerated pulp. Optimized dewatering performance with controllable maceration is also possible.
- a mode of operation can also be selected in which a required maceration can be set, but which has minimal power consumption by the compression screw. In this way, the wear on the compression screw, spool, etc. can be minimized, or vice versa, after wear and tear on the compression screw, spool, etc., a required maceration can still be set, which enables extended use, since the worn components can be replaced later can.
- the influence of an inhomogeneous material to be conveyed as it is, for example, is fed unevenly to the compression screw, has inherently highly scattering good properties or a variable composition, can be compensated, whereby the required maceration can be adjusted in each case.
- the solution according to the invention allows the compression screw to be started up quickly with low power consumption, with the maceration being able to be regulated or set quickly.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Paper (AREA)
- Screw Conveyors (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ATA51015/2019A AT522964B1 (de) | 2019-11-25 | 2019-11-25 | Vorrichtung und verfahren zur mazeration eines foerderguts |
| PCT/EP2020/073045 WO2021104691A1 (de) | 2019-11-25 | 2020-08-18 | Vorrichtung und verfahren zur mazeration eines foerderguts |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP4065763A1 true EP4065763A1 (de) | 2022-10-05 |
| EP4065763B1 EP4065763B1 (de) | 2023-11-22 |
| EP4065763C0 EP4065763C0 (de) | 2023-11-22 |
Family
ID=72148107
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP20758165.3A Active EP4065763B1 (de) | 2019-11-25 | 2020-08-18 | Vorrichtung und verfahren zur mazeration eines foerderguts |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP4065763B1 (de) |
| CN (1) | CN114729506B (de) |
| AT (1) | AT522964B1 (de) |
| CA (1) | CA3154512C (de) |
| WO (1) | WO2021104691A1 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT527474B1 (de) * | 2024-07-16 | 2025-03-15 | Andritz Ag Maschf | Vorrichtung zur behandlung eines fasermaterials |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3066359A (en) | 1957-11-05 | 1962-12-04 | Chicopee Mfg Corp | Methods and apparatus for producing fibrous webs |
| DE3207878A1 (de) * | 1982-03-05 | 1983-09-15 | Hermann Berstorff Maschinenbau Gmbh, 3000 Hannover | Einrichtung zum mechanischen trennen von fluessigkeiten aus fluessigkeitsfeststoffgemischen |
| CA1309962C (en) | 1989-09-19 | 1992-11-10 | John Eccelston | Plug screw feeder |
| US5320034A (en) * | 1989-09-19 | 1994-06-14 | Kvaerner Hymac, Inc. | Method and apparatus for increasing surface within wood chips |
| US7300540B2 (en) * | 2004-07-08 | 2007-11-27 | Andritz Inc. | Energy efficient TMP refining of destructured chips |
| CA2507321C (en) * | 2004-07-08 | 2012-06-26 | Andritz Inc. | High intensity refiner plate with inner fiberizing zone |
| US7357074B2 (en) * | 2005-03-02 | 2008-04-15 | Andritz Inc. | Compression screw with combination single and double flights |
| JP5225190B2 (ja) * | 2009-04-28 | 2013-07-03 | 水ing株式会社 | スクリュープレス型汚泥脱水装置、及びその運転方法 |
| SE537195C2 (sv) | 2012-02-22 | 2015-03-03 | Valmet Oy | Matningsanordning, system och metod för att hantera icketräbaserat växtmaterial |
| US9833961B2 (en) * | 2014-04-02 | 2017-12-05 | Orion Enterprise International LLC | Extracting-squeezing-compressing equipment used for municipal solid waste mixture |
| EP3268534B1 (de) * | 2015-03-11 | 2019-01-23 | Andritz, Inc. | Verfahren und vorrichtung zum aufschliessen von lignocellulosischen materialien |
| EP3333311B1 (de) | 2016-12-08 | 2019-09-25 | Valmet AB | Verfahren zum imprägnieren von biomasse und vorrichtung zum imprägnieren von biomasse |
| EP3333313B1 (de) * | 2016-12-08 | 2019-10-16 | Valmet AB | Verfahren zur behandlung von biomasse und vorrichtung zur behandlung von biomasse |
-
2019
- 2019-11-25 AT ATA51015/2019A patent/AT522964B1/de active
-
2020
- 2020-08-18 CA CA3154512A patent/CA3154512C/en active Active
- 2020-08-18 WO PCT/EP2020/073045 patent/WO2021104691A1/de not_active Ceased
- 2020-08-18 CN CN202080081223.9A patent/CN114729506B/zh active Active
- 2020-08-18 EP EP20758165.3A patent/EP4065763B1/de active Active
Also Published As
| Publication number | Publication date |
|---|---|
| AT522964A4 (de) | 2021-04-15 |
| AT522964B1 (de) | 2021-04-15 |
| CN114729506B (zh) | 2023-09-19 |
| CN114729506A (zh) | 2022-07-08 |
| CA3154512C (en) | 2024-05-21 |
| WO2021104691A1 (de) | 2021-06-03 |
| EP4065763B1 (de) | 2023-11-22 |
| EP4065763C0 (de) | 2023-11-22 |
| CA3154512A1 (en) | 2021-06-03 |
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