A cylinder screen for pulp impurity removal

Abstract

This utility model discloses a cylindrical screen for removing impurities from pulp, relating to the field of pulp technology. It includes a filter barrel body, with a support frame fixedly connected to the outer wall of the filter barrel body. A barrel cover body is placed at the top of the filter barrel body, and a feed hopper for facilitating pulp entry into the filter barrel body is fixedly connected to the center of the top of the barrel cover body. Through a first and second adsorption mechanism, the curved magnetic rod shell and the arc-shaped electromagnet release a corresponding magnetic field inside the filter barrel body. This attracts magnetic impurities inside the pulp, which are then adsorbed onto the outer wall of the magnetic rod shell. The arc shape increases the contact area with the pulp, improving adsorption efficiency. After use, the arc-shaped electromagnet can be disconnected to remove the magnetic impurities.

Description

Technical Field

[0001] This utility model relates to the field of pulp technology, specifically a cylindrical screen for removing impurities from pulp. Background Technology

[0002] Pulp removal is a crucial step in the pulp production process, significantly improving pulp quality and production efficiency. As the basic raw material for the paper industry, pulp quality directly affects the physical, chemical, and performance properties of paper. In the pulp production process, removal technology is applied to multiple stages. During the raw material processing stage, coarse impurities, such as metal blocks and glass fragments, need to be removed to protect the normal operation of subsequent equipment.

[0003] In existing technologies, the diversity of pulp raw materials, especially the extensive use of recycled fibers, leads to a significant increase in the content of magnetic impurities in the pulp. These impurities not only originate from metal particles adhering to the raw wood during transportation, but also include metal residues such as iron wires and staples introduced during the recycling process. If not cleaned in time, magnetic impurities will have multiple effects on the pulp flow process: First, impurities may scratch or wear down the inner walls of the conveying pipes and equipment, increasing the frequency of equipment maintenance; second, impurities will interfere with the uniform distribution of pulp fibers, resulting in localized weaknesses or holes during paper forming. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a cylindrical screen for removing impurities from pulp. It employs a first adsorption mechanism and a second adsorption mechanism. Its shape allows it to effectively contact the pulp and adsorb magnetic impurities in the pulp through magnetic force, thereby reducing the impact of magnetic impurities on the pulp.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a cylindrical screen for removing impurities from pulp, comprising...

[0006] The filter barrel body has a support frame fixedly connected to its outer side wall, and a barrel cover body is placed on the top of the filter barrel body.

[0007] A feed hopper is fixedly connected at the center of the top of the barrel lid body to facilitate the entry of pulp into the filter barrel body;

[0008] The inner top of the barrel lid is located inside the filter barrel body and is equipped with a first adsorption mechanism and a second adsorption mechanism to attract magnetic impurities in the pulp.

[0009] Preferably, the first adsorption mechanism and the second adsorption mechanism have the same structure. The first adsorption mechanism includes a connecting plate bolted to the top of the inner part of the barrel lid body. Several magnetic rod shells are arranged in a linear array at the bottom of the connecting plate, and an arc-shaped electromagnet is placed inside the magnetic rod shell.

[0010] Preferably, an installation plate is fixedly connected to the end of the connection between the magnetic rod shell and the connecting plate, and the magnetic rod shell is fixedly connected to the connecting plate through the installation plate. The first adsorption mechanism and the second adsorption mechanism are arranged alternately.

[0011] Preferably, a second side plate is symmetrically fixedly connected to the outer side wall of the main body of the bucket lid, and a first side plate is symmetrically fixedly connected to the outer side wall of the main body of the filter bucket above the support frame. An electric push rod is fixedly connected to the top of each of the two first side plates, and the telescopic end of the electric push rod is fixedly connected to the bottom of the second side plate.

[0012] Preferably, a load-bearing rib is fixedly connected inside the filter barrel body, and a filter plate for fine filtration of pulp is placed at the top of the load-bearing rib inside the filter barrel body, and the filter plate is slidably connected inside the filter barrel body.

[0013] Preferably, an electrode post connected to a power source is fixedly connected to the top of the connecting plate, and the electrode post penetrates the top of the barrel lid body.

[0014] Preferably, the feed hopper is positioned at the intersection of the first adsorption mechanism and the second adsorption mechanism, and is also positioned at the center of the circle.

[0015] Compared with existing technologies, this cylindrical screen for removing impurities from pulp has the following advantages:

[0016] I. This utility model, through the setting of a first adsorption mechanism and a second adsorption mechanism, allows the curved magnetic rod shell and the arc-shaped electromagnet to release a corresponding magnetic field inside the filter barrel body, thereby attracting magnetic impurities inside the pulp and adsorbing them onto the outer wall of the magnetic rod shell. Due to the arc shape, the contact area with the pulp is increased, which can improve the adsorption efficiency. After use, the arc-shaped electromagnet can be disconnected to clean the magnetic impurities.

[0017] Second, this utility model, through the setting of the magnetic rod shell and mounting plate, since the arc electromagnet is located on the outer wall of the magnetic rod shell, and the magnetic rod shell and the arc electromagnet are connected to the connecting plate through the mounting plate, can replace the arc electromagnet or the magnetic rod shell in time when it is damaged, thereby improving the efficiency of use and avoiding the situation where it cannot be used due to damage.

[0018] Other advantages, objectives and features of this invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination or study, or may be taught from the practice of this invention. Attached Figure Description

[0019] Figure 1This is a three-dimensional structural diagram of the cylindrical screen used for removing impurities from pulp according to this utility model;

[0020] Figure 2 This is a schematic cross-sectional view of the filter barrel body of this utility model.

[0021] Figure 3 This is a schematic diagram of the adsorption mechanism of this utility model;

[0022] Figure 4 This is a schematic diagram of the structure of the first adsorption mechanism of this utility model;

[0023] Figure 5 This is a schematic diagram of the bottom of the main body of the bucket lid of this utility model.

[0024] In the diagram: 1. Filter barrel body; 2. Barrel lid body; 3. Support frame; 4. Feed hopper; 5. First side plate; 6. Electric push rod; 7. Second side plate; 8. First adsorption mechanism; 81. Connecting plate; 82. Magnetic rod shell; 83. Arc electromagnet; 84. Mounting plate; 9. Second adsorption mechanism; 10. Filter plate; 11. Load-bearing rib; 12. Electrode post. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] like Figure 1-5 As shown, this utility model provides a technical solution: a cylindrical screen for removing impurities from pulp, including a filter barrel body 1, a support frame 3 for support fixedly connected to the outer wall of the filter barrel body 1, a barrel cover body 2 placed at the top of the filter barrel body 1, a feed hopper 4 for facilitating pulp entry into the filter barrel body 1 fixedly connected at the center of the top of the barrel cover body 2, and a first adsorption mechanism 8 and a second adsorption mechanism 9 for attracting magnetic impurities in the pulp located inside the filter barrel body 1 at the inner top of the barrel cover body 2.

[0027] It should be noted that the dual adsorption mechanisms work together: the first adsorption mechanism 8 and the second adsorption mechanism 9 inside the barrel lid body 2 are designed with a strong magnetic field, which can effectively adsorb magnetic impurities in the pulp and significantly improve the purity of the pulp. The detachable design of the barrel lid body 2 makes it easy to clean the internal residues and improve the equipment maintenance efficiency.

[0028] like Figure 2 , Figure 3 and Figure 4As shown, the first adsorption mechanism 8 and the second adsorption mechanism 9 have the same structure. The first adsorption mechanism 8 includes a connecting plate 81 bolted to the top of the inner part of the barrel lid body 2. Several magnetic rod shells 82 are arranged in a straight array at the bottom of the connecting plate 81. In this embodiment, there are five magnetic rod shells 82, which are staggered with the magnetic rod shells 82 below the second adsorption mechanism 9. This can effectively increase the contact area with the pulp, thereby better adsorbing magnetic impurities. An arc-shaped electromagnet 83 is placed inside the magnetic rod shell 82. An mounting plate 84 is fixedly connected to the end of the connection between the magnetic rod shell 82 and the connecting plate 81. The magnetic rod shell 82 is fixedly connected to the connecting plate 81 through the mounting plate 84. The first adsorption mechanism 8 and the second adsorption mechanism 9 are staggered. An electrode post 12 connected to the power supply is fixedly connected to the top of the connecting plate 81, and the electrode post 12 penetrates the top of the barrel lid body 2.

[0029] It should be noted that the first adsorption mechanism 8 and the second adsorption mechanism 9 are staggered at the top of the inner lid body 2, forming a multi-area magnetic field coverage. Each adsorption mechanism fixes the arc-shaped electromagnet 83 through the magnetic rod shell 82 of the linear array, ensuring that the magnetic field is evenly distributed on the pulp flow path, reducing adsorption blind spots, and improving the magnetic impurity capture rate. The electrode column 12 is connected to the power supply, and the magnetic field strength of the arc-shaped electromagnet 83 can be precisely controlled by adjusting the current. Compared with permanent magnets, electromagnets can adapt to pulps with different iron contents, flexibly adjust the adsorption efficiency, and at the same time avoid the magnetic field being too strong, which would cause the pulp fibers to be magnetized and affect subsequent processes.

[0030] like Figure 1 and Figure 2 As shown, a second side plate 7 is symmetrically fixedly connected to the outer side wall of the barrel lid body 2, and a first side plate 5 is symmetrically fixedly connected to the outer side wall of the filter barrel body 1 above the support frame 3. An electric push rod 6 is fixedly connected to the top of each of the two first side plates 5. The telescopic end of the electric push rod 6 is fixedly connected to the bottom end of the second side plate 7. A load-bearing rib 11 is fixedly connected inside the filter barrel body 1. A filter plate 10 for fine filtering of pulp is placed inside the filter barrel body 1 at the top of the load-bearing rib 11. The filter plate 10 is slidably connected inside the filter barrel body 1, so that the filter plate 10 can be removed in time to clean the impurities attached to its surface.

[0031] It should be noted that the electric push rod 6 integrated in the first side plate 5 is connected to the second side plate 7 through the telescopic end, realizing the automatic opening and closing of the barrel lid body 2. The filter plate 10 cooperates with the load-bearing rib 11 through the slide rail structure to realize quick installation and disassembly.

[0032] like Figure 2 and Figure 5 As shown, the feed hopper 4 is positioned at the intersection of the first adsorption mechanism 8 and the second adsorption mechanism 9, and is also positioned at the center of the circle.

[0033] It should be noted that the outlet of the feed hopper 4 is directly opposite the intersection of the first adsorption mechanism 8 and the second adsorption mechanism 9, so that the pulp flow is fully covered by the magnetic field in the initial stage. The design of the center position, combined with the guide surface, ensures that the pulp passes through the adsorption area in a laminar flow state, and the flow rate will be reduced, which can achieve the adsorption of the pulp.

[0034] Working principle: Pulp enters the filter barrel body 1 through the feed hopper 4 at the top of the barrel lid body 2. The first adsorption mechanism 8 and the second adsorption mechanism 9, located at the top of the barrel lid body 2, begin to work. The first adsorption mechanism 8 includes a connecting plate 81, with a magnetic rod shell 82 arranged in a linear array at the bottom of the connecting plate 81. An arc-shaped electromagnet 83 is placed inside. When the arc-shaped electromagnet 83 is energized, it generates a magnetic field. The magnetic rod shell 82 is designed in a curved state, which increases the contact area with the pulp and improves the adsorption efficiency. Magnetic impurities in the pulp are adsorbed onto the outer wall of the magnetic rod shell 82 under the action of the magnetic field. The first adsorption mechanism 8 and the second adsorption mechanism 9 are arranged alternately to form a multi-area magnetic field coverage. To ensure the pulp fully contacts the magnetic field during flow, the impurity removal rate is improved. After adsorption is complete, the power supply to the arc electromagnet 83 is disconnected, and the magnetic impurities lose their magnetic attraction, making them easy to clean. The magnetic rod shell 82 and the connecting plate 81 are fixedly connected by the mounting plate 84. When the arc electromagnet 83 or the magnetic rod shell 82 is damaged, the mounting plate 84 can be quickly disassembled for replacement, improving equipment efficiency. At the same time, the modular design of the magnetic rod shell 82 and the mounting plate 84 facilitates timely replacement of damaged parts, improving equipment maintenance efficiency. The electric push rod 6 realizes the automatic opening and closing of the barrel lid body 2. Combined with the load-bearing ribs 11 and the sliding filter plate 10, the pulp filtration process is optimized, improving overall work efficiency.

[0035] It should be noted that in this document, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used solely for the convenience of describing this utility model and for 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. The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, unless otherwise explicitly specified and limited, the terms "fixed," "installed," "connected," and "linked" should be interpreted broadly. For example, "installed" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a mechanical connection or an electrical connection; "linked" can be a direct connection, an indirect connection through an intermediate medium, or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0036] 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, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A cylindrical screen for removing impurities from pulp, characterized in that: include The filter barrel body has a support frame fixedly connected to its outer side wall, and a barrel cover body is placed on the top of the filter barrel body. A feed hopper is fixedly connected at the center of the top of the barrel lid body to facilitate the entry of pulp into the filter barrel body. The inner top of the barrel lid body is located inside the filter barrel body and is equipped with a first adsorption mechanism and a second adsorption mechanism to attract magnetic impurities in the pulp.

2. The cylindrical screen for removing impurities from pulp according to claim 1, characterized in that: The first adsorption mechanism and the second adsorption mechanism have the same structure. The first adsorption mechanism includes a connecting plate bolted to the top of the inner part of the barrel lid body. Several magnetic rod shells are arranged in a linear array at the bottom of the connecting plate. An arc-shaped electromagnet is placed inside the magnetic rod shell.

3. The cylindrical screen for removing impurities from pulp according to claim 2, characterized in that: An installation plate is fixedly connected to the end of the connection between the magnetic rod shell and the connecting plate. The magnetic rod shell is fixedly connected to the connecting plate through the installation plate. The first adsorption mechanism and the second adsorption mechanism are arranged alternately.

4. The cylindrical screen for removing impurities from pulp according to claim 1, characterized in that: The outer side wall of the barrel lid body is symmetrically and fixedly connected with a second side plate, and the outer side wall of the filter barrel body is symmetrically and fixedly connected with a first side plate above the support frame. The top ends of the two first side plates are fixedly connected with electric push rods, and the telescopic ends of the electric push rods are fixedly connected to the bottom ends of the second side plates.

5. The cylindrical screen for removing impurities from pulp according to claim 1, characterized in that: The filter barrel body is fixedly connected to a load-bearing rib. A filter plate for fine filtration of pulp is placed at the top of the load-bearing rib inside the filter barrel body. The filter plate is slidably connected inside the filter barrel body.

6. The cylindrical screen for removing impurities from pulp according to claim 2, characterized in that: An electrode post connected to a power source is fixedly connected to the top of the connecting plate, and the electrode post penetrates the top of the barrel lid body.

7. The cylindrical screen for removing impurities from pulp according to claim 1, characterized in that: The feed hopper is positioned at the intersection of the first and second adsorption mechanisms, which is also positioned at the center of the circle.

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