A paper pulp dewatering device for a paper-plastic separating machine

Abstract

This utility model provides a pulp dewatering device for a paper-plastic separator, belonging to the field of pulp recycling equipment. It includes a water collection tank, a feed hopper, a discharge hopper, and a dewatering module. The water collection tank is an integrated cavity structure used to collect the separated liquid produced during pulp dewatering. The feed hopper, located at one end of the water collection tank, guides the pulp into the dewatering module. The discharge hopper, located at the other end of the water collection tank, discharges the dewatered solid material. The dewatering module, rotatably located inside the water collection tank, includes a cylindrical filter screen, a spiral guide plate arranged along the inner wall of the filter screen, a connecting shaft passing through the filter screen's axis, a fixing ring sleeved on the outer wall of the filter screen, ribs connecting the fixing ring and the filter screen, and an end plate sealing the end of the filter screen. It also includes side guide rollers that abut against the outer side of the filter screen and connect to the water collection tank to support the stable rotation of the filter screen. After the pulp enters the filter screen through the feed hopper, it is dewatered under the centrifugal force of the rotating filter screen. The separated liquid falls into the water collection tank, and the solid material is discharged through the discharge hopper.

Description

Technical Field

[0001] The utility model relates to the field of pulp recycling equipment, in particular to a pulp dewatering device for a paper-plastic separator. Background Art

[0002] Paper-plastic separation and recycling is a process of separating paper and plastic from composite materials by physical or chemical methods and recycling them respectively. It is mainly used to treat waste composite materials such as express packaging and beverage cartons to realize resource recycling. Pulp dewatering is a key link for fiber recovery after paper-plastic separation, and its effect directly affects the recovery quality and production efficiency of pulp.

[0003] At present, in practical applications, the pulp dewatering devices matched with existing paper-plastic separators generally adopt horizontally arranged filter screen structures. When this filter screen structure operates, additional power is required to push the pulp forward. If the power is insufficient, local accumulation of pulp is prone to occur, which in turn leads to filter screen blockage and uneven dewatering. Filter screen blockage affects the normal operation of the device, and uneven dewatering leads to uneven pulp quality. All these problems seriously affect the overall operation efficiency of the paper-plastic separator and the dewatering device, and hinder the entire resource recycling process. Content of Utility Model

[0004] In order to overcome some of the problems mentioned in the above background, the present invention provides a pulp dewatering device for a paper-plastic separator.

[0005] The technical scheme adopted by the utility model is as follows: a pulp dewatering device for a paper-plastic separator, comprising: a water collection tank, which is an integrated cavity structure and is used for collecting separated liquid generated by pulp dewatering; a feed hopper, which is arranged at one end of the water collection tank and is used for guiding pulp into the dewatering module; a discharge hopper, which is arranged at the other end of the water collection tank and is used for discharging solid materials after dewatering; a dewatering module, which is rotatably arranged inside the water collection tank, and comprises a cylindrical filter screen, a spiral guide plate arranged along the inner wall of the filter screen, a connecting shaft penetrating through the axis of the filter screen, a fixing ring sleeved on the outer wall of the filter screen, rib plates connecting the fixing ring and the filter screen, and end plates sealing the ends of the filter screen; a side guide roller, which abuts against the outer side of the filter screen and is connected with the water collection tank, and is used for supporting the filter screen to rotate stably; after the pulp enters the filter screen through the feed hopper, it is dewatered under the centrifugal effect of the rotation of the filter screen, the separated liquid falls into the water collection tank, and the solid materials are discharged through the discharge hopper.

[0006] further, the connecting shaft is in driving connection with a driving module, and the driving module is arranged at the top of the water collection tank; The other end of the connecting shaft is connected to the end plate via a bracket. The filter screen rotates synchronously with the connecting shaft to ensure stable operation of the filter screen during the dehydration process.

[0007] Furthermore, the top of the water collection tank is also equipped with a spray module. The spray module includes a fixing block and multiple spray pipes. The spray pipes are installed on the top of the water collection tank through the fixing block. The multiple spray pipes extend along the length of the water collection tank. The spray pipes are equipped with nozzles facing the filter screen surface for rinsing the filter screen surface, preventing pulp from clogging the filter screen pores, and ensuring continuous and stable dewatering efficiency.

[0008] Furthermore, the side guide rollers are evenly distributed along the inner wall of the water collection tank, and the side guide rollers are arranged parallel to the axis of the filter screen. The fixing ring and the side guide wheel form a rolling engagement, effectively supporting the filter screen and guiding it to rotate smoothly.

[0009] Furthermore, a rotating bearing is provided between the feed hopper and the end plate, and the filter screen can rotate freely relative to the feed hopper through the rotating bearing.

[0010] Furthermore, the filter screen is inclined, with its feed end higher than its discharge end, forming an inclined angle for gravity-assisted discharge, and the spiral guide plate extends spirally along the inner wall of the filter screen from the feed end to the discharge end. The discharge end of the filter screen is configured as an open structure, which matches and connects with the upper opening of the discharge hopper.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: The filter screen is arranged at an angle and combined with an inner spiral guide plate. Utilizing both its own weight and centrifugal force, it achieves passive discharge, eliminating the need for an additional pushing mechanism, thereby improving discharge efficiency and reducing energy consumption. Simultaneously, the angled filter screen design effectively extends the residence time of the pulp in the dewatering zone, significantly improving the dewatering effect; the spiral guide plate rotates synchronously with the filter screen, continuously pushing the material towards the discharge end, effectively preventing clogging.

[0012] The side guide rollers and the fixed ring form a rolling fit, which, together with the sliding support at the top of the water collection tank, achieves multi-point uniform support for the filter screen, avoiding offset or shaking, and further improving the uniformity of dehydration. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of a pulp dewatering device for a paper-plastic separator according to an embodiment of the present invention; Figure 2 This is a top view schematic diagram of the pulp dewatering device for a paper-plastic separator according to an embodiment of the present invention; Figure 3 for Figure 2 Schematic diagram of the AA section along the middle edge; Figure 4 for Figure 3 Schematic diagram of the BB section along the middle.

[0014] In the diagram: 1. Water collection tank; 2. Feed hopper; 3. Spray module; 31. Spray pipe; 32. Fixing block; 4. Drive module; 5. Discharge hopper; 6. Dewatering module; 61. Filter screen; 62. Guide plate; 63. Connecting shaft; 64. Fixing ring; 65. Rib plate; 66. End plate; 7. Side guide roller. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0016] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0017] like Figures 1-4 As shown, in some embodiments, a pulp dewatering device for a paper-plastic separator includes a water collection tank 1, a feed hopper 2, a discharge hopper 5, and a dewatering module 6. Specifically, the water collection tank 1, as an integrated load-bearing component of the entire device, is designed as an integrated cavity structure. The dewatering module 6 is rotatably installed inside the water collection tank 1. The separated liquid generated during the dewatering process is collected and treated through the water collection tank 1, and the separated liquid is discharged from the water collection tank 1 through a drain port.

[0018] The feed hopper 2 is installed at one end of the water collection tank 1. Its function is to guide the pulp so that it can smoothly enter the dewatering module 6, providing an initial channel for the pulp dewatering operation.

[0019] The discharge hopper 5 is installed at the other end of the water collection tank 1. After the pulp has been dewatered, the discharge hopper 5 discharges the dewatered solid material from the device, thus achieving the orderly output of the dewatered material.

[0020] Specifically, the dewatering module 6 is the core component for centrifugal dewatering of pulp, including a cylindrical filter screen 61, a guide plate 62, and a connecting shaft 63. The cylindrical filter screen 61 serves as the main working surface for centrifugal dewatering, and its sidewalls are evenly distributed with water-permeable holes, allowing water to pass through the filter screen and enter the water collection tank 1 under the action of centrifugal force, while solid fibers are trapped inside the filter screen 61.

[0021] The guide plate 62 is fixed to the inner wall of the cylindrical filter screen 61, extends axially and is spirally distributed, and is used to guide the pulp forward when the dewatering module 6 rotates, while preventing the pulp from accumulating and clogging during centrifugation, so as to ensure continuous and efficient dewatering.

[0022] The connecting shaft 63 is used to transmit power. It passes through the center of the cylindrical filter screen 61 and drives the filter screen 61 and the guide plate 62 to rotate synchronously, so that the pulp can be continuously dewatered and moved forward under the dual action of centrifugal force and spiral propulsion.

[0023] To ensure the structural strength of the filter screen 61 and prevent deformation or damage during high-speed rotation, the outer wall of the cylindrical filter screen 61 is provided with fixing rings 64 and reinforcing ribs 65. These two components form a reinforced skeleton, effectively improving the filter screen's resistance to deformation. The fixing rings 64 are arranged at intervals along the axial direction of the cylindrical filter screen 61 and welded to the radially distributed reinforcing ribs 65 to form a stable structure, effectively enhancing the overall rigidity of the filter screen and ensuring its safety and reliability during prolonged high-speed operation. Simultaneously, the fixing rings 64 are slidably connected to the top inner wall of the water collection tank 1, ensuring stable upper support for the dewatering module 6 during rotation and preventing vibration and displacement caused by suspension.

[0024] Meanwhile, an end plate 66 is provided at the feed end of the filter screen 61. The end plate 66 is sealed to its side wall to form a closed feed chamber, preventing pulp leakage during initial entry. The end plate 66 is connected to the outlet of the feed hopper 2 to ensure that the pulp is completely introduced into the internal cavity of the filter screen 61.

[0025] The side guide roller 7 abuts against the outside of the filter screen 61 and is connected to the water collection tank 1. Its main function is to support the filter screen 61, ensuring that the filter screen 61 remains stable during rotation and preventing deviation or shaking, thereby ensuring the normal operation of the dewatering process. The side guide roller 7 further enhances the supporting rigidity of the filter screen 61, avoiding deviation caused by vibration and ensuring smooth and reliable dewatering operation.

[0026] The specific dewatering process is as follows: The pulp is introduced into the inner cavity of the filter screen 61 through the feed hopper 2. Under the centrifugal force generated by the rotation of the filter screen 61, the water passes through the water permeable holes on the side wall of the filter screen 61 and enters the water collection tank 1. The solid fibers are intercepted and pushed forward by the spirally distributed guide plate 62. As dewatering proceeds, the material gradually concentrates and moves towards the discharge hopper 5, and is finally discharged in a stable form, achieving continuous and efficient dewatering.

[0027] Furthermore, in some embodiments, the drive end of the connecting shaft 63 is connected to the drive module 4 via a transmission connection. The drive module 4 provides a stable torque output, ensuring that the connecting shaft 63 can drive the filter screen 61 to rotate stably, maintaining the continuity and uniformity of the dehydration process.

[0028] To ensure the stability of the drive module 4, it is installed on the bracket on top of the water collection tank 1 and fixed with bolts to ensure stability during operation.

[0029] The other end of the connecting shaft 63 is connected to the end plate 66 via a bracket, which provides stable support for the connecting shaft 63. Simultaneously, the filter screen 61 rotates synchronously with the connecting shaft 63. When the connecting shaft 63 begins to rotate under the drive of the drive module 4, the filter screen 61 also rotates synchronously. This synchronous rotation design ensures that the filter screen 61 maintains a stable operating state during pulp dewatering, preventing instability in the filter screen's operation from affecting the dewatering effect, thus ensuring that the entire pulp dewatering process can proceed efficiently and stably.

[0030] Furthermore, in some embodiments, the top of the water collection tank 1 is also provided with a spray module 3 for periodically rinsing the outer surface of the filter screen 61 to prevent fibers from clogging the water permeable holes and ensure that the dehydration efficiency remains stable.

[0031] Specifically, the spray module 3 includes a fixing block 32 and multiple spray pipes 31, wherein the spray pipes 31 are securely mounted on the top of the water collection tank 1 by means of the fixing block 32. It is worth noting that the multiple spray pipes 31 extend along the length of the water collection tank 1. Furthermore, each spray pipe 31 is equipped with a nozzle, which is oriented towards the surface of the filter screen 61. Its main function is to perform high-pressure washing on the surface of the filter screen 61 to remove residual fibers and impurities adhering to the surface of the filter screen 61, preventing pore blockage and affecting water permeability.

[0032] Furthermore, in some embodiments, side guide rollers 7 are disposed on both sides of the filter screen 61, providing an upwardly inclined support for the filter screen 61. These side guide rollers 7 are evenly distributed along the inner wall of the water collection tank 1, and this even distribution makes the entire device more stable and balanced during operation.

[0033] Furthermore, the side guide roller 7 is set parallel to the axis of the filter screen 61, and forms a rolling engagement with the side guide roller 7 through the fixing ring 64. While supporting the filter screen 61, it can also guide the filter screen 61 to rotate smoothly, so that the pulp dewatering process can be carried out more efficiently and orderly, thereby improving the working performance and effect of the pulp dewatering device for the entire paper-plastic separator.

[0034] Furthermore, in some embodiments, the end plate 66 is disposed at the feed end of the filter screen 61, and a rotating bearing is provided between the feed hopper 2 and the end plate 66. The filter screen 61 can rotate freely relative to the feed hopper 2 using this rotating bearing, ensuring that the filter screen 61 is not obstructed by the feed hopper 2 during rotation and maintaining smooth operation. A seal is provided between the end plate 66 and the feed hopper 2 to prevent pulp leakage and improve the cleanliness and safety of the dewatering operation.

[0035] Furthermore, in some embodiments, the filter screen 61 is arranged at an angle. Specifically, the feed end of the filter screen 61 is higher than the discharge end, thus forming an angle that allows the pulp to be discharged with the aid of its own weight. This angle allows the pulp to move more smoothly from the feed end to the discharge end under its own weight, effectively improving the discharge efficiency. At the same time, the spiral guide plate 62 extends spirally along the inner wall of the filter screen 61 from the feed end to the discharge end. This spiral extension design can further guide the flow direction of the pulp within the filter screen 61, ensuring that the pulp is evenly distributed within the filter screen 61, thereby achieving a better dewatering effect.

[0036] Furthermore, the discharge end of filter screen 61 is specially designed with an open structure. This open structure can be matched and connected with the opening at the upper end of discharge hopper 5. Through this matching and connection, the material discharged from the discharge end of filter screen 61 can accurately enter discharge hopper 5, avoiding leakage or spillage of material during the discharge process, and ensuring the stability and continuity of the entire pulp dewatering process.

[0037] The inclined filter screen 61, combined with the inner spiral guide plate 62, achieves passive discharge through the combined action of its own weight and centrifugal force, eliminating the need for an additional pushing mechanism, thus improving discharge efficiency and reducing energy consumption. Simultaneously, the inclined filter screen design effectively extends the residence time of the pulp in the dewatering zone, enhancing the dewatering effect; the spiral guide plate rotates synchronously with the filter screen, continuously pushing the material towards the discharge end to prevent clogging.

[0038] The specific work of this utility model is as follows: Feeding stage After the paper-plastic separation, the pulp enters the feed hopper 2 from the discharge end of the paper-plastic separation line, and then enters the filter screen 61 through the feed hopper 2.

[0039] Centrifugal dehydration stage When the drive module 4 starts, the motor drives the connecting shaft 63 to rotate via the pulley, which in turn drives the filter screen 61 to rotate. The rotation of the filter screen 61 generates centrifugal force, and the free water in the pulp is thrown out through the pores of the filter screen 61 under the action of centrifugal force and falls into the water collection tank 1 (achieving solid-liquid separation). At the same time, the spiral guide plate 62 guides the pulp to spiral forward along the inner wall of the filter screen 61, avoiding local accumulation and ensuring that each part of the pulp can fully contact the filter screen 61, resulting in uniform dewatering. The rolling cooperation between the side guide roller 7 and the fixed ring 64 ensures that the filter screen 61 rotates without shaking and that the dewatering gap is consistent.

[0040] Discharge stage Guided by the spiral guide plate 62, and under the combined action of its own gravity and centrifugal force, the pulp moves toward the discharge end of the filter screen 61 and finally falls into the discharge hopper 5 from the opening end of the filter screen 61, from which the material is discharged to the next process.

[0041] Cleaning stage After a period of dehydration, the nozzles in the spray module 3 spray high-pressure liquid evenly onto the outer wall of the filter screen 61 to flush away the pulp residue and impurities adhering to the pores of the filter screen 61. As the filter screen 61 continues to rotate, the spray liquid can cover the entire circumference and length of the filter screen 61, effectively preventing the filter screen 61 from clogging. The waste liquid after cleaning and the dehydration separation liquid fall into the water collection tank 1 together and are discharged from the water collection tank 1 through the drain pipe.

[0042] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0043] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. A pulp dewatering device for a paper-plastic separator, characterized in that, include: The water collection tank (1) is an integrated cavity structure used to collect the separation liquid generated during pulp dewatering; The feed hopper (2) is located at one end of the water collection tank (1) and is used to guide the pulp into the dewatering module (6). The discharge hopper (5) is located at the other end of the water collection tank (1) and is used to discharge the dehydrated solid material; The dewatering module (6) is rotatably disposed inside the water collection tank (1), including a cylindrical filter screen (61), a spiral guide plate (62) arranged along the inner wall of the filter screen (61), a connecting shaft (63) passing through the axis of the filter screen (61), a fixing ring (64) sleeved on the outer wall of the filter screen (61), a rib plate (65) connecting the fixing ring (64) and the filter screen (61), and an end plate (66) closing the feed end of the filter screen (61). Side guide roller (7) abuts against the outside of the filter screen (61) and is connected to the water collection tank (1) to support the stable rotation of the filter screen (61); After the pulp enters the filter screen (61) through the feed hopper (2), it is dehydrated under the centrifugal action of the rotating filter screen (61). The separated liquid falls into the water collection tank (1), and the solid material is discharged from the discharge hopper (5).

2. The pulp dewatering device for a paper-plastic separator according to claim 1, characterized in that, The drive end of the connecting shaft (63) is connected to the drive module (4) for transmission, and the drive module (4) is located on the top of the water collection tank (1); The other end of the connecting shaft (63) is connected to the end plate (66) via a bracket. The filter screen (61) rotates synchronously with the connecting shaft (63) to ensure stable operation of the filter screen (61) during the dehydration process.

3. The pulp dewatering device for a paper-plastic separator according to claim 1, characterized in that, The top of the water collection tank (1) is also provided with a spray module (3). The spray module (3) includes a fixing block (32) and multiple spray pipes (31). The spray pipes (31) are installed on the top of the water collection tank (1) through the fixing block (32). The multiple spray pipes (31) extend along the length of the water collection tank (1). The spray pipes (31) are provided with nozzles facing the surface of the filter screen (61) for rinsing the surface of the filter screen (61) to prevent pulp from clogging the pores of the filter screen (61) and to ensure that the dewatering efficiency remains stable.

4. The pulp dewatering device for a paper-plastic separator according to claim 1, characterized in that, The side guide rollers (7) are evenly distributed along the inner wall of the water collection tank (1). The side guide rollers (7) are arranged parallel to the axis of the filter screen (61). The fixing ring (64) forms a rolling fit with the side guide wheel, effectively supporting the filter screen (61) and guiding it to rotate smoothly.

5. The pulp dewatering device for a paper-plastic separator according to claim 1, characterized in that, A rotating bearing is provided between the feed hopper (2) and the end plate (66), and the filter screen (61) can rotate freely relative to the feed hopper (2) through the rotating bearing.

6. The pulp dewatering device for a paper-plastic separator according to claim 1, characterized in that, The filter screen (61) is inclined, with its feed end higher than its discharge end, forming an inclined angle for gravity-assisted discharge. The spiral guide plate (62) extends spirally from the feed end to the discharge end along the inner wall of the filter screen (61). The discharge end of the filter screen (61) is configured as an open structure, which matches and connects with the upper opening of the discharge hopper (5).

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