Impurity removing device for a pulp press

Abstract

The utility model provides a kind of impurity removal device for paper pulp filter press, it relates to paper pulp manufacturing equipment field, the device includes conveying mechanism and multiple stirring mechanisms, multiple stirring mechanisms are arrayed to be set on conveying mechanism;Conveying mechanism includes oppositely arranged upper conveying module and lower conveying module, and upper conveying module and lower conveying module both include rotating roller and the conveying belt of sleeve set on rotating roller, and the cooperation area of upper and lower conveying module is equipped with magnetic area;Stirring mechanism includes rotary tooth and connecting sleeve.The reverse movement of upper and lower conveying belts drives the rotary tooth of interpenetrating arrangement to contact each other and rotate, form the effect of "three-dimensional stirring", improve the residence time of paper pulp in magnetic area, and improve the full stirring of paper pulp, make deep impurities expose, improve the removal rate of iron impurities.

Description

Technical Field

[0001] This utility model relates to the field of pulp manufacturing equipment, specifically a purification device for a pulp filter press. Background Technology

[0002] Pulp, as one of the essential raw materials for papermaking, requires multiple processes, including pulping, screening, and bleaching of cellulose materials such as virgin wood or waste paper. The purity of the pulp plays a crucial role in the final quality of the paper. Iron impurities in the pulp, such as nails, wires, and iron filings, not only affect the appearance and feel of the paper but can also damage papermaking equipment and cause production interruptions. Therefore, removing iron impurities is of paramount importance.

[0003] In existing technologies, most iron separators use slurry iron removers to adsorb and separate iron impurities from the slurry. Their working principle is similar to that of a magnetic separator; a strong magnetic field is generated, causing iron impurities to be adsorbed onto the separator by magnetic force. As the slurry flows, iron impurities gradually accumulate on the surface of the separator. Once a certain thickness is reached, the machine needs to be stopped and manually removed. Furthermore, these iron separators often use a fixed structure, and the slurry tends to stratify during flow, making it impossible to completely adsorb iron impurities, resulting in less than ideal iron removal efficiency. Utility Model Content

[0004] In order to overcome some of the problems mentioned in the background above, this invention provides a purification device for a pulp filter press.

[0005] The technical solution adopted by this utility model is as follows: A pulp filter press impurity removal device includes a conveying mechanism and multiple stirring mechanisms, wherein the multiple stirring mechanisms are arranged in an array on the conveying mechanism; The conveying mechanism includes an upper conveying module and a lower conveying module arranged opposite to each other. Both the upper and lower conveying modules include a rotating roller and a conveyor belt sleeved on the rotating roller. The conveyor belt of the lower conveying module rotates in a top-to-bottom direction. The conveyor belt of the upper conveying module moves in the opposite direction to that of the lower conveying module, and the mating area between the two is provided with a magnetic area. The stirring mechanism includes rotating teeth and a connecting sleeve. The connecting sleeve is disposed on the conveyor belt. The stirring mechanisms located on the upper and lower conveyor modules are interlaced and, driven by the conveyor belt, come into contact with each other through relative movement and generate rotation to stir the pulp and cooperate with the magnetic zone to adsorb iron impurities in the pulp.

[0006] Furthermore, the conveyor belt is also provided with multiple connecting posts, which are arranged in multiple rows along the length of the conveyor belt, and the connecting posts of the upper conveying module and the connecting posts of the lower conveying module are staggered in the vertical direction. The connecting sleeve is fitted onto the connecting column, and a wear-resistant bearing, which is a thrust ball bearing, is provided between the two.

[0007] Furthermore, the rotating tooth has a cylindrical structure with multiple teeth evenly distributed circumferentially on its surface. Each tooth has an arc-shaped groove structure. When two adjacent rotating teeth move relative to each other, the teeth contact each other through the groove surface to generate rotational torque.

[0008] Furthermore, the rotating roller is connected to the drive motor via a coupling, and the speed difference ratio between the upper and lower conveyor belts is 1:1.8-1:2.0.

[0009] Furthermore, the magnetic region includes two sub-magnetic regions respectively disposed in the upper conveying module and the lower conveying module. Each sub-magnetic region contains multiple magnetic strip groups extending along the width direction of the conveyor belt. The magnetic strip groups are composed of permanent magnet strips and electromagnetic strips arranged at intervals. When the conveyor belt rotates to the magnetic zone, the rotating teeth and the conveyor belt form a synergistic magnetic field under the action of the magnetic zone, which is used to adsorb iron impurities in the pulp.

[0010] Furthermore, it also includes a housing, the top of which is provided with a feed inlet and the bottom with a discharge outlet, and an inclined guide plate is connected to the discharge outlet; The conveying mechanism is encapsulated within the housing.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: The reverse movement of the upper and lower conveyor belts drives the interlaced rotating teeth to contact and rotate, forming a "three-dimensional stirring" effect. This increases the residence time of the pulp in the magnetic zone and enhances the thorough stirring of the pulp, exposing deep impurities and improving the removal rate of iron impurities.

[0012] A collection box specifically designed for collecting impurities is located directly below the non-magnetic return section of both the upper and lower conveyor modules. The bottom of this collection box is angled, allowing impurities to fall into it and slide down the slope, thus automatically cleaning them and significantly improving the removal efficiency of ferrous impurities. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of a pulp filter press impurity removal device according to an embodiment of the present invention; Figure 2 This is a top view schematic diagram of the impurity removal device for a pulp filter press according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the internal structure of the impurity removal device for a pulp filter press according to an embodiment of the present invention; Figure 4 for Figure 3Schematic diagram of the stirring mechanism.

[0014] In the picture: 1. Shell; 2. Discharge port; 3. Inlet port; 4. Drive motor; 5. Stirring mechanism; 51. Rotating gear; 52. Connecting sleeve; 6. Conveying mechanism; 61. Rotating roller; 62. Conveyor belt; 63. Connecting column; 7. Collection box; 8. Guide plate; 9. Magnetic zone. 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 filter press impurity removal device is installed before the pulp filter press to adsorb and remove iron impurities present in the pulp, thereby improving the quality of the pulp. The device includes a conveying mechanism 6 and multiple stirring mechanisms 5, which are arranged in an array on the conveying mechanism 6, forming a complete iron impurity removal system.

[0018] Specifically, the conveying mechanism 6 includes a double-layer conveying design with opposing layers, consisting of an upper conveying module and a lower conveying module. Both modules contain rotating rollers 61 and conveyor belts 62 mounted on them. Of particular note is that the conveyor belt 62 of the lower conveying module runs in a downward direction, while the conveyor belt 62 of the upper conveying module runs in the opposite direction. A magnetic zone 9 exists in the area where the two modules meet. This reverse-running design significantly increases the residence time of the pulp in the magnetic zone 9, greatly improving the impurity removal efficiency.

[0019] It is worth noting that the conveyor belt 62 has a double-layer structure. The inner layer is a metal layer, specifically a thin low-carbon steel plate, with micro-magnetic perforations on its surface. This design does not affect the flexibility of the conveyor belt 62 and allows the magnetic field to penetrate more evenly to the surface through the perforations. The outer layer is a rubber wear-resistant layer, ensuring the wear resistance and corrosion resistance of the conveyor belt 62. During operation, the magnetic field is rapidly conducted and diffused throughout the width of the conveyor belt 62 through the metal layer, then penetrates the rubber wear-resistant layer and acts on the pulp, adsorbing iron impurities in the pulp onto the surface of the conveyor belt 62.

[0020] The mixing mechanism 5 includes a rotating tooth 51 and a connecting sleeve 52. The rotating tooth 51 is detachably connected to the conveyor belt 62 through the connecting sleeve 52. A certain gap is left between the bottom surface of the rotating tooth 51 and the upper surface of the conveyor belt 62 to prevent impurities adsorbed on the surface of the conveyor belt 62 from falling off when the mixing mechanism 5 rotates relative to the conveyor belt 62.

[0021] In particular, the stirring mechanism 5 located on the upper and lower conveying modules adopts an interlaced arrangement. Driven by the conveyor belt 62, these modules come into contact with each other through relative motion and generate rotational action. This unique motion mode can not only fully stir the pulp, but also work in synergy with the magnetic zone 9 to effectively adsorb various iron impurities in the pulp.

[0022] A collection box 7 specifically for collecting impurities is installed directly below the non-magnetic return section of the upper and lower conveying modules. The bottom of the collection box 7 is inclined, and impurities falling into the collection box 7 will slide down the slope, completing the automatic cleaning of impurities and significantly improving the ease of use of the equipment.

[0023] The reverse movement of the upper and lower conveyor belts 62 drives the interlaced rotating teeth 51 to contact and rotate, forming a "three-dimensional stirring" effect, which increases the residence time of the pulp in the magnetic zone 9 and enhances the full stirring of the pulp, exposing deep impurities and improving the removal rate of iron impurities.

[0024] Furthermore, in some embodiments, the conveyor belt 62 is also provided with a plurality of connecting posts 63, which are distributed in multiple rows in a uniform array along the longitudinal extension direction of the conveyor belt 62. It is particularly noteworthy that the connecting posts 63 located in the upper conveying module and the connecting posts 63 located in the lower conveying module adopt a precise staggered arrangement design in vertical space, and this spatial layout can achieve the best force transmission effect.

[0025] The inner hole of the connecting sleeve 52 fits tightly with the connecting column 63, and a wear-resistant bearing assembly is provided on the mating contact surface between the two. Specifically, the wear-resistant bearing type selected is a thrust ball bearing. This design ensures that the connecting sleeve 52 and the connecting column 63 can rotate freely 360 degrees. Furthermore, the matrix-style multi-row layout of the connecting column 63, combined with the staggered spatial arrangement, plays a role in fully agitating the pulp.

[0026] Furthermore, in some embodiments, the rotating tooth 51 adopts a cylindrical main structure, with multiple tooth elements evenly arranged along a 360-degree direction on its outer circumferential surface. These teeth are not traditional protruding structures, but rather adopt an arc-shaped groove shape. When the device is running, during the relative rotational motion of two adjacent rotating teeth 51, their tooth tips transmit power through the mating groove contact surfaces. This contact method can generate stable and efficient rotational torque.

[0027] Its working principle is as follows: when the rotating tooth 51 moves, the groove structure will form a local vortex field in the fluid. The generation of this vortex can effectively increase the residence time of the pulp in the magnetic zone 9, thereby ensuring that iron impurities are effectively adsorbed.

[0028] Furthermore, in some embodiments, the rotating roller 61 is connected to the drive motor 4 via a coupling. Of particular note is the speed difference ratio between the upper and lower conveyor belts 62, which is 1:1.8 to 1:2.0. This speed difference design ensures thorough mixing of the pulp. By precisely controlling the speed ratio of the upper and lower conveyor belts 62, the stability of the impurity removal process is improved.

[0029] Furthermore, in some embodiments, the magnetic region 9 also adopts a dual-module design, located in the cooperating area of ​​the upper and lower conveying modules, specifically including two sub-magnetic regions integrated inside the upper and lower conveying modules respectively. Each sub-magnetic region consists of multiple magnetic strip groups evenly distributed along the width direction of the conveyor belt 62. These magnetic strip groups adopt a mixed magnetic pole arrangement, composed of alternating permanent magnet strips and electromagnetic strips. The permanent magnet strips provide a stable magnetic field foundation, while the electromagnetic strips can dynamically change the magnetic field strength by adjusting the current, further enhancing the process flexibility of the device.

[0030] When the conveyor belt 62 moves to the working position of the magnetic zone 9, the rotating tooth 51 and the conveyor belt 62 will form a composite magnetic field region with a specific gradient distribution under the synergistic effect of the magnetic zone 9. This magnetic field region can efficiently capture iron impurity particles of different sizes in the pulp.

[0031] Furthermore, in some embodiments, the device also includes a housing 1, with an inlet 3 at the top of the housing 1 corresponding to the lower conveyor belt 62, through which the pulp material is effectively guided to flow evenly and stably into the device; and an outlet 2 at the bottom of the housing 1, with a guide plate 8 at an inclined angle connected to the outlet. This design can ensure that the processed pulp is discharged smoothly and can effectively prevent pulp splashing.

[0032] The conveying mechanism 6 is completely sealed and installed inside the housing 1. In particular, the magnetic area 9 needs to be waterproofed to form a fully enclosed cavity, reducing the impact of moisture in the pulp on the magnetic area 9.

[0033] The specific workflow of this embodiment Step 1: Pulp Feeding and Conveying Guidance Stage The pulp to be processed (concentration 8%-35%) is injected through the feed inlet 3, which corresponds to the feed end of the conveyor belt 62 of the lower conveyor module. Under the guidance of the feed inlet 3, the pulp is evenly spread on the surface of the lower conveyor belt 62 to avoid local accumulation.

[0034] The conveyor belt 62 of the lower conveyor module runs in a "top-down" direction, driving the pulp to move into the magnetic zone 9 inside the device; at the same time, the conveyor belt 62 of the upper conveyor module runs in the opposite direction "bottom-up", forming a counter-conveyor trend to prepare for subsequent mixing.

[0035] Step Two: Three-Dimensional Stirring and Magnetic Synergistic Adsorption Stage When the pulp enters the cooperation area of ​​the upper and lower conveyor modules along the lower conveyor belt 62, the stirring mechanism 5 arranged in an "interlaced" manner on the upper and lower conveyor belts 62 begins to interact with each other - the rotating teeth 51 of the upper conveyor belt 62 and the rotating teeth 51 of the lower conveyor belt 62 come into contact and rotate due to the difference in reverse speed.

[0036] During the rotation, the arc-shaped groove forms a local vortex field in the pulp, breaking the laminar flow state of the pulp and realizing three-dimensional stirring of "lateral shearing + longitudinal tumbling", which fully exposes the iron impurities wrapped deep in the fibers; at the same time, the vortex prolongs the residence time of the pulp in the magnetic zone 9, increasing the probability of contact between impurities and the magnetic field.

[0037] Step 3: Clean pulp discharge and filter press connection stage After the pulp has been stirred and adsorbed, it continues to run "from top to bottom" along the lower conveyor belt 62. After leaving the magnetic zone 9, the pulp slides smoothly out along the guide plate 8 and enters the feed end of the downstream pulp filter press directly from the discharge port 2. There is no splashing or retention, achieving a seamless connection between "impurity removal and filter pressing".

[0038] Step 4: Magnetic Impurity Shedding and Collection Cleaning Stage The conveyor belt 62 (upper and lower modules) that adsorbs impurities continues to operate. After leaving the magnetic zone 9, it enters the "non-magnetic return section"—where the magnetic field disappears, the iron impurities lose their magnetic attraction, and under the action of their own gravity and the vibration of the conveyor belt 62, they begin to fall off the surface of the conveyor belt 62.

[0039] The detached impurities fall directly into the collection box 7 directly below the non-magnetic return section. The inclined surface (inclination angle 10-15°) at the bottom of the collection box 7 guides the impurities to slide down the inclined surface, avoiding accumulation in the box and realizing automatic cleaning of impurities without affecting continuous production.

[0040] 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.

[0041] 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 purification device for a pulp filter press, characterized in that, It includes a conveying mechanism (6) and multiple stirring mechanisms (5), wherein the multiple stirring mechanisms (5) are arranged in an array on the conveying mechanism (6); The conveying mechanism (6) includes an upper conveying module and a lower conveying module arranged opposite to each other. Both the upper conveying module and the lower conveying module include a rotating roller (61) and a conveyor belt (62) sleeved on the rotating roller (61). The conveyor belt (62) of the lower conveying module rotates in the direction from top to bottom. The conveyor belt (62) of the upper conveying module moves in the opposite direction to the lower conveying module. The mating area of ​​the two is provided with a magnetic area (9). The stirring mechanism (5) includes a rotating tooth (51) and a connecting sleeve (52). The connecting sleeve (52) is set on the conveyor belt (62). The stirring mechanisms (5) located on the upper and lower conveyor modules are interlaced and rotate with each other through relative movement driven by the conveyor belt (62) to stir the pulp and cooperate with the magnetic area (9) to adsorb iron impurities in the pulp. A collection box (7) is provided below the non-magnetic return section of the upper and lower conveying modules.

2. The impurity removal device for a pulp filter press according to claim 1, characterized in that, The conveyor belt (62) is also provided with a plurality of connecting posts (63), the connecting posts (63) are arranged in multiple rows along the length direction of the conveyor belt (62), and the connecting posts (63) of the upper conveying module and the connecting posts (63) of the lower conveying module are staggered in the vertical direction; The connecting sleeve (52) is fitted onto the connecting column (63), and a wear-resistant bearing is provided between the two. The wear-resistant bearing is a thrust ball bearing.

3. The impurity removal device for a pulp filter press according to claim 1, characterized in that, The rotating tooth (51) is a cylindrical structure with multiple teeth evenly distributed on its surface along the circumference. The teeth are arc-shaped grooves. When two adjacent rotating teeth (51) move relative to each other, the teeth contact each other through the groove surface to generate rotational torque.

4. The impurity removal device for a pulp filter press according to claim 1, characterized in that, The rotating roller (61) is connected to the drive motor (4) via a coupling, and the speed difference ratio between the upper and lower conveyor belts (62) is 1:1.8-1:2.

0.

5. The impurity removal device for a pulp filter press according to claim 1, characterized in that, The magnetic area (9) includes two sub-magnetic areas (9) respectively disposed in the upper conveying module and the lower conveying module. Each sub-magnetic area (9) contains multiple magnetic strip groups extending along the width direction of the conveyor belt (62). The magnetic strip groups are composed of permanent magnet strips and electromagnetic strips arranged at intervals. When the conveyor belt (62) rotates to the magnetic zone (9), the rotating teeth (51) and the conveyor belt (62) form a synergistic magnetic field under the action of the magnetic zone (9), which is used to adsorb iron impurities in the pulp.

6. The impurity removal device for a pulp filter press according to claim 1, characterized in that, It also includes a housing (1), the top of which is provided with a feed inlet (3) and the bottom with a discharge outlet (2), and an inclined guide plate (8) is connected to the discharge outlet (2). The conveying mechanism (6) is encapsulated within the housing (1).

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