Water injection drum and fiber material processing equipment

Abstract

The invention relates to a water injection drum (30) having a water supply system (32) for mixing a fibrous material suspension, preferably dissolved in a dissolving drum (10), with injected water, the fibrous material suspension comprising in particular fibrous materials of high consistency in a high concentration range, such as waste paper, and the fibrous material suspension being able to flow into the water injection drum (30) in an inlet region (320). The water supply system (32) comprises at least one water channel (34) having a water receiving chamber (37) and a flow channel (38) adjoining the water receiving chamber (37), the water receiving chamber (37) being arranged in the outlet region (340) and the flow channel (38) communicating with the deflection region (39), thereby forming a labyrinth water delivery system in which water flows from the water receiving chamber (37) into the flow channel (38), the fibrous suspension flows through the flow channel (38) in a direction opposite to the flow direction of the fibrous suspension and is diverted to the flow direction of the fibrous suspension in a diverting region (39).

Description

[0001] The present invention relates to a water injection drum for adding water to dilute dissolved fiber material, especially high-consistency fiber material in a high-consistency range, and also relates to a fiber material processing device for dissolving and sorting the fiber material.

[0002] Dissolving and sorting equipment are used in the processing of fibrous materials, such as waste paper. In waste paper dissolving systems, in addition to separating the fiber content of cardboard and paper raw materials, it is also necessary to remove coarse, unusable components such as plastic and glass, which are called waste residue.

[0003] Dissolving equipment is used to prepare fiber raw material so that it can be used in the form of a fiber suspension in machines for producing fiber webs, especially paper webs. Typically, the fiber consistency of the fiber suspension is 18-20%. After dissolution, the fiber suspension is sorted by wet screening to retain non-fibrous impurities on the screen and separate them according to size. The usable fibers then pass through the screen mesh as accepts along with some of the water.

[0004] Due to changes in waste paper composition, particularly the significant increase in waste residue and recovery rates, dissolving drums are increasingly being used for dissolving and preliminary rough sorting of fiber material. For sorting the dissolved fiber material, sorting drums with perforated drum bodies are used. These drums offer low maintenance, minimal wear, simple operation, and the ability to disperse insoluble raw materials. For sorting, the fiber suspension must be further diluted with water to separate the fibers from impurities. This dilution water is added via a water pipe, which is axially arranged outside the sorting drum and injects water into the perforated drum interior via multiple nozzles. Within the drum interior, the fibers are then diluted and subsequently rinsed. As the drum rotates, the water either bounces off the drum's inner surface or flows out through the perforations and is collected in a receiving container.

[0005] To achieve efficient sorting, the fiber suspension's fiber consistency needs to be below 10%. However, in order to reduce the initial consistency of the fiber suspension at the inlet area of ​​the sorting drum from 18-20% to 10-12%, a sorting drum length of several meters is required. This means that the entire area of ​​the sorting drum cannot be optimally utilized.

[0006] EP 3 892 773 A1 discloses an apparatus for adding dilution water to the end of the dissolution zone of a dissolution drum. The apparatus comprises an annular groove arranged around the dissolution zone of the dissolution drum. The bottom of the annular groove forms the outer wall of the dissolution drum, and two opposing groove walls extend radially outward from the dissolution drum. Multiple curved tubes extend from the annular groove into the interior of the dissolution drum, with the radially inner opening of each curved tube oriented opposite the direction of rotation of the dissolution drum. The annular groove is covered by a fixed annular groove cover. A dilution water supply and discharge pipe lead into the annular groove cover.

[0007] The technical problem to be solved by the present invention is to provide a water injection drum for adding dilution water to dissolved fiber material, in particular waste paper. This water injection drum allows efficient, rapid, safe, and non-intrusive dilution of the fiber suspension after dissolution for effective sorting. In particular, the consistency of the dissolved fiber suspension should be reduced to 10-12% over a short transport path, thereby extending the sorting process path in the sorting drum.

[0008] This object is achieved according to the invention with respect to the water injection drum by the features of claim 1 and with respect to the fiber material processing device by the features of claim 9. The remaining claims relate to preferred embodiments of the invention.

[0009] According to a first aspect of the present invention, a water injection drum having a water supply system is provided for mixing a fibrous stock suspension, preferably dissolved in a dissolving drum, with injected water. The fibrous stock suspension, in particular, contains high-consistency fibrous material in the high-consistency range, such as waste paper, and the fibrous stock suspension can flow into the water injection drum in an inlet region. The water supply system comprises at least one water channel having a water receiving chamber and a flow channel adjacent to the water receiving chamber, wherein the water receiving chamber is arranged in the outlet region and the flow channel communicates with a deflection region, thereby forming a labyrinthine water supply system in which water flows from the water receiving chamber into the flow channel, flows through the flow channel in a direction opposite to the flow direction of the fibrous stock suspension, and deflects in the deflection region into the direction of the flow of the fibrous stock suspension.

[0010] With the water injection drum according to the present invention, water is not injected directly into the fibrous suspension. Instead, mixing of the fibrous suspension and water occurs only after the injected water flows through the water receiving chamber, the flow channel, and the deflection zone. This significantly increases the water flow rate and, therefore, the mixing efficiency. Furthermore, the labyrinthine structure of the water supply system prevents contamination of the water supply system by the fibrous suspension, as the different flow directions of the injected water and the fibrous suspension effectively prevent the fibrous suspension from flowing back into the flow channel. Overall, the fibrous suspension sorting process is significantly improved, as the fibrous suspension can be diluted to a sorting consistency within the range of 10-12% early in the process.

[0011] In one development, it is provided that the flow channel is U-shaped and has an oblique slope relative to the axial rotation axis (RA) of the water injection drum, thereby effectively promoting the flow of water.

[0012] In one embodiment, it is provided that the water receiving chamber has, for the supply of water, a perforated area with a plurality of perforations, through which water can be introduced simply and efficiently radially into the water receiving chamber.

[0013] In another embodiment, it is provided that the bottom region of the water receiving chamber is designed to be inclined relative to the axial rotation axis (RA) of the water filling drum, so that the water can be deflected from the radial direction to the axial direction.

[0014] In particular, it is provided that a protective element is provided in order to prevent the opening of the deflecting region from being contaminated by the fibrous stock suspension.

[0015] In an advantageous embodiment, the water supply system comprises a plurality of water channels which are arranged in a circumferential manner on the inner surface of the outer shell of the water filling drum, thereby achieving an evenly distributed injection of water over the entire inner surface of the water filling drum and enabling a larger water supply.

[0016] In another embodiment, a first partition plate and a second partition plate are provided. The first partition plate has a through-opening for the fibrous suspension flowing into the water injection drum, and the second partition plate has a through-opening for the fibrous suspension flowing out. This allows for simple coupling to the dissolving drum on the inlet side of the water injection drum and to the sorting drum on the outlet side of the water injection drum. Furthermore, the through-opening of the first partition plate guides the incoming fibrous suspension to the water mixing zone, protecting the water supply system from contamination. The through-opening of the second partition plate allows the mixed fibrous suspension to be discharged from the water injection chamber, protecting the water supply system from contamination.

[0017] Advantageously, the water channel is arranged between the first partition plate and the annular third partition plate, thereby improving the stability of the water supply system.

[0018] According to a second aspect of the present invention, a fiber material processing apparatus is provided for dissolving and sorting fiber material, particularly high-consistency fiber material in a high-consistency range, such as waste paper. The fiber material processing apparatus comprises at least one dissolving drum having a drum body for dissolving the fiber material into a fiber material suspension, and further comprises at least one sorting drum having an at least partially perforated drum body, directly or indirectly coupled to the dissolving drum, the sorting drum being used to subsequently sort the fiber material suspension to separate accept pulp and reject pulp. According to the present invention, a water injection drum with a water supply system is arranged between the dissolving drum and the sorting drum, and the water injection drum is used to mix the fiber suspension dissolved in the dissolving drum with the injected water, wherein the water supply system includes at least one water channel, and the at least one water channel has a water receiving chamber and a flow channel adjacent to the water receiving chamber, wherein the water receiving chamber is arranged in the outlet area and the flow channel is connected to the turning area, thereby forming a labyrinthine water supply system, in which water flows from the water receiving chamber into the flow channel, flows through the flow channel in a direction opposite to the flow direction of the fiber suspension, and turns to the flow direction of the fiber suspension in the turning area.

[0019] With the fiber material processing equipment according to the present invention, water is not injected directly into the fiber material suspension. Instead, it is mixed with the fiber material suspension only after the injected water flows through the water receiving chamber, the flow channel, and the turning area. This significantly increases the flow rate of the water, thereby improving the mixing efficiency. In addition, the labyrinthine structure of the water supply system prevents the water supply system from being contaminated by the fiber material suspension, because the different flow directions of the injected water and the fiber material suspension effectively prevent the fiber material suspension from flowing back into the flow channel. Overall, the sorting process of the fiber material suspension is significantly improved because the fiber material suspension can be diluted to a sorting consistency within the range of 10-12% in the early stage of the process.

[0020] In a further development, it is provided that the flow channel is U-shaped and has an oblique gradient relative to the axial rotation axis (RA) of the water injection drum, thereby effectively promoting the flow of water.

[0021] In one embodiment, it is provided that the water receiving chamber has, for the supply of water, a perforated area with a plurality of perforations, through which water can be introduced simply and efficiently radially into the water receiving chamber.

[0022] In particular, the design of the perforated region corresponds to the design of the perforated outer casing of the classifying drum, since this simplifies the production and assembly of the fiber material processing device.

[0023] In another embodiment, it is provided that the bottom region of the water receiving chamber is designed to be inclined relative to the axial rotation axis (RA) of the water filling drum, so that the water can be deflected from the radial direction to the axial direction.

[0024] In particular, it is provided that a protective element is provided in order to prevent the opening of the deflecting region from being contaminated by the fibrous stock suspension.

[0025] In an advantageous embodiment, the water supply system comprises a plurality of water channels which are arranged in a circumferential manner on the inner surface of the outer shell of the water filling drum, thereby enabling the water to be injected evenly distributed over the entire inner surface of the water filling drum and enabling a larger water supply.

[0026] In another embodiment, a first partition plate is provided between the dissolving drum and the water injection drum, the first partition plate having a through-opening for the fibrous suspension flowing into the water injection drum. A second partition plate is provided between the water injection drum and the separation drum, the second partition plate having a through-opening for the fibrous suspension flowing out. This ensures a simple coupling of the dissolving drum with the water injection drum on the inlet side, and of the separation drum with the water injection drum on the outlet side. Furthermore, the through-opening of the first partition plate guides the incoming fibrous suspension to the water mixing zone, protecting the water supply system from contamination. The through-opening of the second partition plate guides the fibrous suspension mixed with water out of the water injection chamber, protecting the water supply system from contamination.

[0027] Advantageously, the water channel is arranged between the first partition plate and the annular third partition plate, thereby improving the stability of the water supply system.

[0028] The present invention will be described in detail below with reference to the embodiments shown in the accompanying drawings.

[0029] In the attached figure:

[0030] Figure 1 A schematic diagram showing a fiber material processing device according to the prior art;

[0031] Figure 2 A schematic cross-sectional view of a fiber material processing apparatus having a water injection drum according to the present invention is shown;

[0032] Figure 3 A schematic top view of a fiber material processing device according to the present invention is shown;

[0033] Figure 4 Shows a perspective view of the interior of the water filling drum with a water supply system;

[0034] Figure 5 Show Figure 4 A cross-sectional view of the water supply system in FIG.

[0035] Figure 6 A perspective top view of the first baffle is shown;

[0036] Figure 7 A perspective top view of the second baffle is shown;

[0037] Figure 8 A top view of the third separator is shown.

[0038] Other features, aspects and advantages of the present invention will be apparent from the detailed description in conjunction with the claims.

[0039] exist Figure 1 The figure schematically illustrates a fiber material processing apparatus 100 according to prior art, used for dissolving and sorting fiber materials. This apparatus 100 is suitable for dissolving fiber materials with high consistency within the high consistency range, particularly waste paper materials containing a high proportion of waste residue. This apparatus 100 includes a dissolving drum 10 and a sorting drum 20, which can be either a one-piece or two-piece structure.

[0040] The dissolving drum 10 comprises a drum body 12, into which the fibrous material is typically introduced in bales at an inlet area 14. The rotary motion of the dissolving drum 10, combined with internally arranged lifting elements, transports the fibrous material suspension upward and then returns to the bottom of the drum body 12. The mechanical forces acting on the fibrous material during this process dissolve it. The rotating drum body 12 enables a continuous dissolution process, resulting in efficient material utilization and uniform, stable processing of the fibrous material. Particularly for highly concentrated fibrous materials and poorly soluble raw materials, agglomeration-free dissolution can be achieved, which can be assisted, if necessary, by dissolving at elevated temperatures and / or adding chemicals. The rotation of the drum body 12 allows for gentle mixing and kneading of the fibrous material, as sufficiently high shear forces are applied to the fibrous material components that still need to be separated, resulting in efficient and energy-efficient dissolution of the fibrous material.

[0041] The dissolving drum 10 is connected to a sorting drum 20. The sorting drum 20 comprises a drum body 22 with multiple perforations. Part of the fibrous suspension transported from the dissolving drum 10 to the sorting drum 20 passes through these perforations as accept 23, while another portion is retained by the perforations as reject 24. Fibers are separated from impurities by the rotation of the drum body 22 in conjunction with lifting elements arranged inside. The fibrous suspension is transported upward by the rotation and then falls back to the bottom of the perforated drum body 22. The rotating drum body 22 enables continuous sorting of the fibrous suspension. To dilute the fibrous suspension with water, at least one water spray pipe 25 with a nozzle extends axially along the outer area of ​​the sorting drum 20 and injects water into the perforated drum body 22. In the inner area of ​​the drum body 12, the fibrous suspension is diluted by the injected water, allowing the fibers to be flushed from the impurities. During the rotation of the drum 22, the water either bounces off the inner surface of the drum 22 or flows through the perforations and is collected in a receiving container.

[0042] To achieve effective fiber sorting in the sorting drum 20, the fiber concentration in the fiber suspension needs to be below 10% to 12%. The initial concentration of the fiber suspension in the inlet area of ​​the sorting drum 20 is between 18% and 24%. In order to reduce the initial concentration of the fiber suspension in the sorting drum 20 to the range of 10% to 12%, the sorting drum 20 needs to have a drum length of several meters. However, this means that the front area of ​​the sorting drum 20 is used to dilute the fiber suspension, because only after an acceptable dilution is achieved can the fibers pass through the perforations of the drum 22 as accepted pulp 23. Therefore, the entire area of ​​the sorting drum 20 is not optimally utilized, because only when the fiber concentration of the fiber suspension is below 10% to 12% can the fibers begin to be transported through the perforations and sorted. Therefore, a large part of the sorting drum 20 is used only for dilution of the fiber suspension. Furthermore, due to insufficient absorption of the injected water by the fibrous stock suspension, some of the water can escape again in the bottom region of the perforated drum 22 and must therefore be conveyed to a collecting container without being utilized. This results in higher water consumption.

[0043] like Figure 2 and Figure 3 As shown, according to the present invention, a water injection drum 30 is arranged between the dissolving drum 10 and the classifying drum 20. In addition, a drying drum 40 is connected downstream of the classifying drum 20. However, it can also be provided that the water injection drum 30 is designed as an independent device and is not directly connected to the dissolving drum 10 and / or the classifying drum 20. In this case, the dissolved fiber stock suspension is fed into the water injection drum 30 via a correspondingly designed conveying device.

[0044] from Figure 3 As can be seen in FIG, the dissolving drum 10, the sorting drum 20, the water injection drum 30, and the drying drum 40 preferably have the same diameter, which may be in the range of 2.5 to 4.5 meters. In a preferred embodiment, the length L1 of the dissolving drum 10 is, for example, 31 meters, the length L2 of the water injection drum 30 is, for example, 3.5 meters, the length L3 of the sorting drum 20 is, for example, 12 meters, and the length L4 of the drying drum 40 is, for example, 1.5 meters.

[0045] Figure 4 The figure shows a perspective view of the interior of the water injection drum 30. The water injection drum 30 preferably directly adjoins the dissolution drum 10, wherein a first partition wall 17 is arranged between the dissolution drum 10 and the water injection drum 30. Figure 6A top perspective view of the first partition 17 is shown in greater detail. The dissolved fibrous suspension flows through the through-hole 18 of the first partition 17 into the inlet area of ​​the water injection drum 30. After entering the water injection drum 30, dilution water is injected into the fibrous suspension. To this end, the water injection drum 30 has a water supply system 32 consisting of multiple water channels 34 arranged around the inner surface of the outer cover 35 of the water injection drum 30. A second partition 27 with a through-hole 28 is located between the water injection drum 30 and the sorting drum 20. The fibrous suspension, diluted and mixed by the water injection, flows through this through-hole into the sorting drum 20. Figure 7 The second separator 27 is shown in more detail in a perspective top view. In particular, it is provided that the through-opening 18 of the first separator 17 is designed to be larger than the through-opening 28 of the second separator 27, since the added water increases the volume of the fibrous stock suspension.

[0046] The water supply system 32 comprises a plurality of water channels 34 arranged in an annular manner on the cylindrical inner surface 35 of the water injection drum 30. This ensures that the water is evenly distributed along the entire inner surface of the water injection drum and enables a large water supply. The water channels 34 are arranged, in particular, between the first partition 17 and the circular third partition 375. This improves the stability of the water supply system 32 and prevents contamination. In particular, it is provided that the spacing between the individual water channels 34 is equal. However, it can also be provided that multiple water channels 34 are combined into a group. The water channel 34 has a water receiving chamber 37 and a flow channel 38 adjacent to the water receiving chamber, into which the water injected into the water receiving chamber 37 flows. The direction of water flow is indicated by arrow A, and the direction of flow of the fibrous suspension is indicated by arrow B. The flow channel 38 is preferably designed to be U-shaped and have a slope.

[0047] like Figure 5 As shown, water is introduced into the water receiving chamber 37 via a pipe system (not shown in detail here). This pipe system preferably comprises a water supply pipe, the water inlet of which is arranged above the highest circulation point (also referred to as the 12 o'clock position) of the cylindrical water filling drum 30. As the water filling drum 30 rotates, the water receiving chambers 37 located in the water inlet region of the water supply pipe are sequentially filled with water. To introduce water, the water receiving chamber 37 has a perforated area 372 with a plurality of perforations, through which water can be introduced into the water receiving chamber 37 like a shower. In particular, the perforated area 372 is designed identically to the perforated housing 35 of the sorting drum 20. In particular, it is provided that the perforated area 372 surrounds the housing 35 of the water filling drum 30. The non-perforated areas of the housing 35 of the water filling drum 30 are separated from it by seals 374 on both sides, thereby preventing uncontrolled diffusion of water onto the housing 35 of the water filling drum 30.

[0048] The water receiving chamber 37 is arranged in the outlet area of ​​the water injection drum 30. The bottom area 377 of the water receiving chamber 37 is designed to be inclined relative to the rotation axis RA of the water injection drum 30, thereby converting the water flow from radial to axial, so that it can then flow into the flow channels 38. A third partition plate 375 is arranged between the water receiving chamber 37 and the flow channels 38 and is provided with a through-opening 380 for each of the surrounding flow channels 38, allowing water to flow from the water receiving chamber 37 into the corresponding flow channels 38. Figure 8 A top view of the second partition plate 27 is shown in greater detail. The flow channel 38 has a slope to increase the water flow velocity, thereby conveying the water in the opposite direction of the fibrous suspension flow. The flow channel 38 ends in a deflection zone 39, where the water flow is redirected in the direction of the fibrous suspension flow and discharged through an opening 392. To protect the fibrous suspension from contamination that could clog the opening 392, a protective element 394 is provided at the opening 392 of the deflection zone 39. This protective element 394 can, in particular, be annular in design.

[0049] Therefore, according to the present invention, the water supply system 32 is constructed as a labyrinthine water delivery system, so that water is not injected directly into the fibrous suspension. Instead, it mixes with the fibrous suspension only after flowing through the water receiving chamber 37, the flow channel 38, and the deflection zone 39. This significantly increases the water flow rate, thereby improving mixing efficiency. Furthermore, the labyrinthine design of the water supply system 32 prevents contamination of the fibrous suspension by the water supply system, as the different flow directions of the injected water and the fibrous suspension effectively prevent the fibrous suspension from flowing back into the flow channel 38. Furthermore, the sizing of the flow channel 38, combined with the rotational speed of the water injection drum 30, ensures that water injected radially at the 12 o'clock position is not delivered axially until the 3 o'clock position of the water injection drum 30, thereby achieving efficient mixing.

[0050] By injecting water through the water supply system 32 according to the present invention, the fiber suspension can be instantly diluted from a 20% dissolved concentration to a classification consistency of 10%-12%. This process significantly reduces fiber loss in the accepted stock 23. Furthermore, the low concentration reduces specific energy consumption and significantly reduces the amount of chemicals used.

[0051] In another embodiment, it can be provided that the temperature of the injection water is adapted to the consistency and properties of the respective fibrous stock suspension in order to thereby control efficient mixing.

[0052] The present invention allows the fiber suspension to be diluted to a classification consistency of 10%-12% with only approximately 3.5 meters of drum length, allowing classification to begin in the front section of the subsequent classification drum 20. Consequently, the entire length of the classification drum 20 can be utilized significantly more efficiently, thereby increasing the yield of usable fibers. In addition to dilution and mixing in the water injection drum 30, the fiber suspension can be further diluted in the classification drum 20 via the water spray pipe 25.

[0053] The water injection drum 30 according to the invention significantly improves the classification process of the fibrous stock suspension, since the fibrous stock suspension can be diluted to a classification consistency range of 10% to 12% at an early stage of the process.

[0054] In the fiber material processing apparatus 100, since the front area of ​​the sorting drum 20 is no longer used to dilute the fiber material suspension to a sorting consistency range of 10%-12%, the significantly longer conveying distance in the sorting drum 20 for actual sorting can be utilized. However, it is also possible to shorten the length of the sorting drum 20 of the fiber material processing apparatus, thereby saving material and costs. In particular, the water injection drum 30 and the fiber material processing apparatus 100 according to the present invention can safely and efficiently handle large-scale production volumes exceeding 2,000 tons per day.

[0055] Description of Reference Numerals

[0056] 10 Dissolving drum

[0057] 12 drum body

[0058] 14 Entrance Area

[0059] 17 First partition

[0060] 18 through-holes

[0061] 20 sorting drum

[0062] 22 drum body

[0063] 23 Good pulp

[0064] 24 Waste residue

[0065] 25 Sprinkler

[0066] 27 Second partition

[0067] 28 through-hole

[0068] 30 Water injection drum

[0069] 32 Water supply system

[0070] 34 Water Channel

[0071] 35 outer cover

[0072] 37 Water receiving chamber

[0073] 38 flow channels

[0074] 39 Turning Area

[0075] 40 Drying drum

[0076] 100 Fiber material processing equipment

[0077] 320 Entrance Area

[0078] 340 Export Zone

[0079] 372 perforation area

[0080] 374 seals

[0081] 375 Third partition

[0082] 377 Bottom area of ​​the water receiving chamber

[0083] 380 Through-hole of the third partition

[0084] 392 Opening

[0085] 394 Protection Components

Claims

1. A water injection drum (30) with a water supply system (32) for mixing a fiber stock suspension preferably dissolved in a dissolving drum (10) with injected water, wherein: The fibrous material suspension particularly contains fibrous material of high consistency in a high concentration range, such as waste paper, and the fibrous material suspension is capable of flowing into the water injection drum (30) in the inlet area (320), characterized in that the water supply system (32) includes at least one water channel (34), the at least one water channel having a water receiving chamber (37) and a flow channel (38) adjacent to the water receiving chamber (37), wherein the water receiving chamber (37) is arranged in the outlet area (340) and the flow channel (38) is connected to the turning area (39), thereby forming a labyrinthine water supply system, in which water flows from the water receiving chamber (37) into the flow channel (38), flows through the flow channel (38) in a direction opposite to the flow direction of the fibrous material suspension, and is turned to the flow direction of the fibrous material suspension in the turning area (39).

2. The water injection drum (30) according to claim 1, wherein: The flow channel (38) is U-shaped and has an oblique slope relative to the axial rotation axis (RA) of the water injection drum (30).

3. The water injection drum (30) according to claim 1 or 2, wherein: The water receiving chamber (37) has a perforated area (372) with a plurality of perforations for the input of water, and water can be radially introduced into the water receiving chamber (37) through these perforations.

4. The water injection drum (30) according to any one of claims 1 to 3, wherein: The bottom region (377) of the water receiving chamber (37) is configured to be inclined relative to the axial rotation axis (RA) of the water filling drum (30), so that water can be diverted from the radial direction to the axial direction.

5. The water injection drum (30) according to any one of claims 1 to 4, wherein A protective element (394) is provided for preventing the opening (392) of the deflection zone (39) from being contaminated by the fibrous stock suspension.

6. The water injection drum (30) according to any one of claims 1 to 5, wherein: The water supply system (32) has a plurality of water channels (34) which are arranged in a circumferential manner on the inner surface of the outer cover (35) of the water filling drum (30).

7. The water injection drum (30) according to any one of claims 1 to 6, wherein: A first partition plate (17) and a second partition plate (27) are provided, wherein the first partition plate has a through-opening (18) for the fiber suspension to flow into the water injection drum (30), and the second partition plate has a through-opening (28) for the fiber suspension to flow out.

8. The water injection drum (30) according to any one of claims 1 to 7, wherein The water channel (34) is arranged between the first partition plate (17) and the annular third partition plate (375).

9. A fiber material processing device (100) for dissolving and sorting fiber material, in particular high-consistency fiber material in a high-consistency range, such as waste paper, the fiber material processing device comprising at least one dissolving drum (10) having a drum body (12) for dissolving the fiber material into a fiber material suspension, and the fiber material processing device further comprising at least one sorting drum (20) having a drum body (22) that is at least partially perforated and directly or indirectly coupled to the dissolving drum (10), the sorting drum being used to subsequently sort the fiber material suspension so as to separate good pulp (23) and waste residue (24), characterized in that A water injection drum (30) having a water supply system (32) is arranged between the dissolving drum (10) and the sorting drum (20), and the water injection drum is used to mix the fiber suspension dissolved in the dissolving drum (10) with the injected water, wherein the water supply system (32) includes at least one water channel (34), and the at least one water channel has a water receiving chamber (37) and a flow channel (38) adjacent to the water receiving chamber (37), wherein the water receiving chamber (37) is arranged in the outlet area (340) and the flow channel (38) is connected to the turning area (39), thereby forming a labyrinthine water supply system, in which water flows from the water receiving chamber (37) into the flow channel (38), flows through the flow channel (38) in a direction opposite to the flow direction of the fiber suspension, and turns to the flow direction of the fiber suspension in the turning area (39).

10. The fiber material processing equipment according to claim 9, wherein: The flow channel (38) is U-shaped and has an oblique slope relative to the axial rotation axis (RA) of the water injection drum (30).

11. The fiber material processing device (100) according to claim 9 or 10, wherein: The water receiving chamber (37) has a perforated area (372) with a plurality of perforations for the input of water, through which water can be radially introduced into the water receiving chamber (37), and wherein the structure of the perforated area (372) corresponds to the structure of the perforated outer cover of the sorting drum (20).

12. The fiber material processing device (100) according to any one of claims 9 to 11, wherein: The bottom region (377) of the water receiving chamber (37) is configured to be inclined relative to the axial rotation axis (RA) of the water filling drum (30), so that water can be diverted from the radial direction to the axial direction.

13. The fiber material processing device (100) according to any one of claims 9 to 12, wherein: A protective element (394) is provided for preventing the opening (392) of the deflection zone (39) from being contaminated by the fibrous stock suspension.

14. The fiber material processing device (100) according to any one of claims 9 to 13, wherein: The water supply system (32) has a plurality of water channels (34) which are arranged in a circumferential manner on the inner surface of the outer cover (35) of the water filling drum (30).

15. The fiber material processing device (100) according to any one of claims 9 to 14, wherein: A first partition (17) is provided between the dissolving drum (10) and the water injection drum (30), the first partition having a through-opening (18) for the fiber suspension to flow into the water injection drum (30), wherein a second partition (27) is provided between the water injection drum (30) and the sorting drum (20), the second partition having a through-opening (28) for the outflowing fiber suspension to flow into the sorting drum (20), and wherein the water channel (34) is arranged between the first partition (17) and an annular third partition (375).

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