EP4562243A1 - Altpapierauflösung - Google Patents
AltpapierauflösungInfo
- Publication number
- EP4562243A1 EP4562243A1 EP23745492.1A EP23745492A EP4562243A1 EP 4562243 A1 EP4562243 A1 EP 4562243A1 EP 23745492 A EP23745492 A EP 23745492A EP 4562243 A1 EP4562243 A1 EP 4562243A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- water
- pulper
- supply
- fiber
- drum
- 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
- 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
- D21B1/32—Defibrating by other means of waste paper
-
- 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
- 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
- D21B1/345—Pulpers
Definitions
- a horizontal opening drum is known from EP 0 164 428 A1.
- the pulping drum for waste paper is rotatable about an approximately horizontal axis and is provided with a closed peripheral wall as a soaking drum for mixing water and waste paper and for soaking the waste paper.
- the waste paper mixed with water is shredded by lifting, sliding and falling, or relative movements of the material parts to one another.
- the dissolution process is carried out continuously. This means that fiber suspension is continuously dispensed at the exit of the drum.
- the pulping drum is followed by a sorting drum with a perforated outer jacket. It can also be provided to provide a part of the opening drum on the outlet side with a perforation, as known from DE 25 47 896.
- Processes for treating waste paper that work with a horizontal pulping drum have the advantage of particularly gentle dissolution, both in terms of sensitive fiber types and undesirable accompanying substances that can be sorted.
- the fiber losses for difficult-to-dissolve fiber materials are high compared to fiber dissolution using an upright dissolution trough. Losses in a pulping drum are high if the shear forces occurring in the drum are not sufficient to shred the raw material. In a continuously operated upright pulper trough, there are always sufficiently high shear forces only in the area of the rotor, which is usually sufficient to tear the raw material and make it so small that it passes through the holes in the sieve arranged below. The further defibration must then also be carried out by subsequent units. Otherwise, the specks that got through the sieve would still be removed as rejects.
- Pulpers in the form of an upright pulper trough with rotors enable the shredding of problematic fibers and substances, but are aggressive and also destroy the impurities.
- These upright pulper troughs can be operated continuously and intermittently. This can lead to grinding and shredding of impurities.
- an upright pulper with a trough is known from KR10 0735 656, in which a control unit is provided.
- the fill level and the addition of dilution water are recorded and the valves provided can be controlled depending on the recorded data.
- a pulper drum is disclosed in US 2005/0103453. It is known to record the supplied paper stock and the addition of water in the horizontal pulper drum with a pulping section and an adjoining sieve section. The energy used by the drum drive is recorded. The intention is to maximize the power input per unit mass.
- the object of this invention is to provide, on the one hand, gentle fiber extraction with increased efficiency.
- the object of the invention is to provide gentle and improved defibration of raw materials that are difficult to dissolve.
- the fiber feed can be better controlled by the measure of determining the filling level at at least two axially spaced locations in a horizontally arranged pulper. By keeping the filling level in the pulper as uniform as possible, more even processing of the pulp can be achieved. In addition, if the fill level in the rear area is increased, an accident can be counteracted by reducing the fiber feed. For example, if the outflow of the suspension is restricted, this incident can be detected by the increased fill level, particularly in the dissolution zone, and a backflow can be counteracted at an early stage by reducing or switching off the supply of fiber material.
- the method is intended to use the method with consistency of greater than 8%. Shearing forces present particularly at such high material densities have an advantageous effect on defibration.
- the consistency is preferably below 20% in order to work energy efficiently. With very high material densities, the time required to evenly wet and soak the dry material increases.
- the method according to the invention is used in a pulper with a U-shaped trough with a horizontally arranged shaft. Fiber and water are preferably fed to an entry zone.
- a pulper with a trough gentle dissolution with high efficiency can be achieved.
- a statically arranged trough it is easy to add fiber and water from above.
- the dissolution zone in particular is divided into several sections. Water regulation may be provided for each section. This makes it possible to achieve a particularly efficient resolution.
- a supply of water is provided in the entry zone and/or the first section depending on the fill level. This can ensure that sufficient dilution water is available.
- water is supplied depending on the detected drive power. In particular, with a high drive power, more water is added for improved dissolution.
- a supply of fiber material is interrupted when a predetermined upper limit value is exceeded, or at least reduced.
- the water supply is also interrupted, or at least reduced.
- the supply of fibrous material is only started again when the filling level falls below a predetermined lower limit value at the same measuring position. This regulation is particularly uncomplicated.
- the supply can only be resumed after a predetermined blocking time interval. This prevents switching back and forth too frequently.
- a suitable minimum time interval has been found to be 10 seconds, preferably 15 seconds.
- water is only supplied during the times when fibrous material is fed into the drum.
- fiber and water are only added together and at the same time.
- a predetermined amount of water is added to the fibrous material supplied. If it is not possible to add water at the same time, water can also be added beyond the period of fiber supply so that the predetermined dilution ratio is maintained.
- Such detection can be carried out particularly easily, particularly by taking images. Recordings from operational monitoring can also be used for this purpose.
- the inflow of water is regulated depending on the volumetric amount of fiber supplied. This makes it easy to reduce fluctuations in consistency. Also The use of radar sensors to record the dump height has proven to be particularly suitable
- a connection can be provided for at least a predetermined time interval, preferably for a time interval in the range of 5 to 15 seconds. This ensures efficient dissolution in the front area despite the high filling level, which contributes to increasing the efficiency of the pulper without risking a malfunction. It can be provided that the different detected filling levels, a low filling level at the front and a high filling level at the rear, must be present over a specified minimum period of time before a supply of fiber material is activated.
- the pulper is controlled by a controller.
- the pulper has a rotor and a rotor drive.
- the control provides a discontinuous supply of pulp for dissolution.
- the control is intended for a discontinuous supply of water and fiber.
- To detect fill levels, at least two spaced sensors are provided in the pulper. It has proven to be advantageous to also record the power consumption of the drive and take it into account when controlling the supply of fiber and water.
- the pulper is provided with a weight detection and/or volume detection for detecting the supplied fibrous material. This means that the supply of water can be tailored to the fiber material. This makes it possible to produce a suspension with a desired consistency more precisely.
- FIG. 1 schematic representation of an embodiment according to the invention with a horizontal trough
- FIG. 2 Schematic representation of an embodiment according to the invention with a horizontal drum
- a pulper 1 is shown in Figure 1.
- the pulper has a trough 3 with an entry zone 5 and a dissolution zone 7.
- entry zone 5 fiber and water are mixed.
- the dissolving zone 7 is intended for soaking and dissolving fiber material.
- Such pulpers with a trough 3 have an axially extending rotor with a rotor shaft 9.
- a rotor drive 11 is provided to drive the rotor.
- the power consumption of the rotor drive 11 is detected by a sensor 39 and supplied to an assigned controller 19.
- the controller 19 is supplied with signals from a fill level sensor 31 and another fill level sensor 33.
- the further fill level sensor 33 is arranged in the dissolution zone 7.
- the further fill level sensor 33 is arranged axially spaced from the first fill level sensor 31.
- Fiber material can be fed to the trough 3 via a waste paper feed 13 and water can be fed through a feed line 15.
- a sensor 35 is provided to detect the fiber feed.
- the sensor 35 can be, for example, a camera 35a for volumetric detection and/or a scale 35b for detecting the weight of the supplied fiber material or also detecting volume and weight.
- a supply line for water 15, also referred to as dilution water, is provided.
- This supply line 15 is a sensor 37 assigned, with the sensor 37 recording the flow of water in liters per time. The amount of water can also be determined by summing over time.
- These sensors 37, 35 are in signal connection with the controller 19.
- Predetermined limit values are stored in the controller 19.
- the supply of fiber and, if necessary, water is controlled depending on a detected fill level.
- control values are stored in the controller. It can also be provided that the recorded data is compared with the stored data and the control is thus refined in order to more precisely adhere to the predetermined values, such as a predetermined concentration of a suspension generated.
- Different predetermined limit values and specifications can also be stored for different qualities of fiber material. The aim is to achieve a concentration of the fiber suspension produced that is as consistent as possible, with this concentration corresponding to a predetermined value.
- the ratio of fiber material and water to be supplied can be stored in the control 19 depending on different waste paper qualities and the desired suspension consistency.
- key figures can also be stored in the control depending on the fiber quality and the desired suspension concentration and the desired degree of processing, which are reflected in the performance of the rotor drive.
- each section 7a and 7b is provided with its own water supply with associated sensors 37 for detecting the dilution water supplied and with a respective level detector 33a and 33b.
- the water supply into the sections 7a, 7b of the drum 23 can be carried out, for example, by means of a water supply known from EP 3 892 773 A1.
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Mechanical Engineering (AREA)
- Paper (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102022118829 | 2022-07-27 | ||
| DE102023102124 | 2023-01-30 | ||
| PCT/EP2023/070390 WO2024022991A1 (de) | 2022-07-27 | 2023-07-24 | Altpapierauflösung |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4562243A1 true EP4562243A1 (de) | 2025-06-04 |
Family
ID=87474420
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP23745492.1A Pending EP4562243A1 (de) | 2022-07-27 | 2023-07-24 | Altpapierauflösung |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20250171956A1 (de) |
| EP (1) | EP4562243A1 (de) |
| DE (1) | DE102023119149A1 (de) |
| WO (1) | WO2024022991A1 (de) |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH612707A5 (en) | 1974-11-07 | 1979-08-15 | Ahlstroem Oy | Process for recovering fibres from fibre material, for example waste paper, and equipment for carrying out the process |
| DE3475540D1 (en) | 1984-06-09 | 1989-01-12 | Finckh Maschf | Apparatus for pulping and sorting waste paper |
| DE10000181A1 (de) | 2000-01-05 | 2001-07-12 | Voith Paper Patent Gmbh | Verfahren zur Auflösung von Altpapier |
| FI113379B (fi) | 2002-03-25 | 2004-04-15 | Metso Paper Inc | Menetelmä kierrätyskuitumateriaalin kuiduttamiseksi rumpupulpperissa sekä rumpupulpperi |
| KR100735656B1 (ko) | 2006-01-23 | 2007-07-12 | 월드파텍(주) | 폐골판지에서 라이나지를 연속적인 공정으로 회수하는 장치및 방법 |
| EP3347521B1 (de) * | 2015-09-07 | 2025-10-08 | Voith Patent GmbH | Rotierende trommel |
| CN112746513B (zh) | 2020-04-07 | 2022-09-06 | 安德里茨(中国)有限公司 | 稀释水添加装置及带有该稀释水添加装置的转鼓碎浆机 |
-
2023
- 2023-07-20 DE DE102023119149.7A patent/DE102023119149A1/de active Pending
- 2023-07-24 EP EP23745492.1A patent/EP4562243A1/de active Pending
- 2023-07-24 WO PCT/EP2023/070390 patent/WO2024022991A1/de not_active Ceased
-
2025
- 2025-01-27 US US19/037,620 patent/US20250171956A1/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| WO2024022991A1 (de) | 2024-02-01 |
| DE102023119149A1 (de) | 2024-02-01 |
| US20250171956A1 (en) | 2025-05-29 |
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