Magnetic separation device and production system

Abstract

The utility model discloses a magnetic separation device and production system, including liquid bath, primary roller and at least one secondary roller, the primary roller has magnetism and can absorb the magnetic substance on the external surface of the primary roller from the mixture, the external surface of the secondary roller is opposite to the external surface of the primary roller, the secondary roller has magnetism and can absorb the magnetic substance on the external surface of the secondary roller. The magnetic separation device further comprises a gap adjusting plate arranged in the liquid tank, the gap adjusting plate is arranged in the liquid tank in a sliding mode, the gap adjusting plate is arranged in the liquid tank, the gap adjusting plate is arranged in the liquid tank in a sliding mode, the gap adjusting plate is arranged in the liquid tank, and the gap adjusting plate is arranged in the liquid tank in a sliding mode and can attract magnetic substances from the outer surface of the first-stage roller. The first set distance is formed between the outer surface of the first-stage roller and the outer surface of the second-stage roller. One end of the gap adjusting plate extends into the liquid inlet, and the shielding area of the liquid inlet can be changed through sliding of the gap adjusting plate. According to the utility model, the abrasion of the roller can be reduced, and the moisture content of separated magnetic substances can be reduced.

Description

Technical Field

[0001] This utility model relates to the field of magnetic separation technology, specifically to a magnetic separation device and production system. Background Technology

[0002] In industrial production processes, such as shot blasting equipment or machining equipment, the mixture / coolant often contains magnetic materials (metals). In order to better recover the magnetic materials, a magnetic separation device is generally used.

[0003] Current magnetic separation devices often face wear and tear issues between the magnetic material and the recovery device during operation, and the recovered magnetic material has a high liquid content, which undoubtedly prolongs the subsequent processing time, increases processing costs, and thus affects the overall recovery efficiency. Utility Model Content

[0004] This invention aims to address one of the technical problems in related technologies to a certain extent. To this end, this invention provides a magnetic separation device and production system that can improve the recovery efficiency of magnetic materials and reduce wear on the recovery device.

[0005] To achieve the above objectives, a first aspect of this utility model discloses a magnetic separation device, comprising a liquid tank, a primary roller, and at least one secondary roller. The primary roller is magnetic and capable of adsorbing magnetic substances from a mixture onto its outer surface. The outer surfaces of the secondary rollers are opposite to those of the primary rollers, and the secondary rollers are also magnetic and capable of adsorbing magnetic substances from the outer surfaces of the primary rollers. A first predetermined distance is formed between the outer surfaces of the primary and secondary rollers. An inlet is formed between the liquid tank and the outer surface of the primary roller. The magnetic separation device further includes a gap adjustment plate disposed in the liquid tank. The gap adjustment plate is slidably disposed in the liquid tank, and one end of the gap adjustment plate extends into the inlet. The sliding of the gap adjustment plate can change the area of ​​obstruction to the inlet.

[0006] Furthermore, the primary roller includes a first inner cylinder and a first outer cylinder. The first outer cylinder is sleeved on the outside of the first inner cylinder. The first inner cylinder has a non-magnetic first separation zone and a magnetic first adsorption zone on the outer surface of the first outer cylinder. The first adsorption zone is used to adsorb magnetic substances.

[0007] The secondary drum includes a second inner cylinder and a second outer cylinder. The second outer cylinder is sleeved outside the second inner cylinder and can rotate relative to the second inner cylinder. The second inner cylinder forms a non-magnetic second separation area and a magnetic second adsorption area on the outer surface of the second outer cylinder. The second adsorption area is opposite to the first separation area. The outer surface of the second outer cylinder and the outer surface of the first outer cylinder form the set spacing, and the rotation directions of the first outer cylinder and the second outer cylinder are the same.

[0008] Further, the magnetic separation device further includes a material receiving plate arranged in a supporting manner with the secondary drum. The material receiving plate is arranged along the axial direction of the second outer cylinder. One end of the material receiving plate is opposite to the second separation area and forms a gap with the outer surface of the second outer cylinder, so as to avoid the material receiving plate from wearing the outer surface of the secondary drum.

[0009] Further, the first outer cylinder of the primary drum is made of a non-metallic material. Compared with metal or stainless steel materials, non-metallic materials are not easily magnetized, which is convenient for separating the magnetic substances adsorbed by the primary drum from the primary drum.

[0010] Further, the first set spacing is between 0 and 5 mm.

[0011] Further, a plurality of secondary drums are provided, and the plurality of secondary drums are arranged at intervals along the circumferential direction of the primary drum, so as to improve the separation efficiency.

[0012] In a second aspect of the present application, a production system is disclosed. The production system further includes the magnetic separation device described in the first aspect. The input end of the liquid tank is docked with the waste discharge port of the production equipment. At least a part of the magnetic outer surface of the primary drum is immersed in the mixed liquid in the liquid tank and forms a spacing with the bottom surface of the liquid tank.

[0013] Further, the liquid tank includes a guide plate and an arc plate. The first end of the guide plate is docked with the waste discharge port of the production equipment. The second end of the guide plate is connected to the arc plate. A depression matching the outer surface of the primary drum is formed on the arc plate. The part of the primary drum immersed in the liquid tank is opposite to the depression. A liquid inlet is formed between the outer surface of the primary drum and the second end of the guide plate. The gap adjusting plate is arranged along the axial direction of the primary drum and is movably arranged on the guide plate. The sliding of the gap adjusting plate can adjust the shielding area of the liquid inlet.

[0014] Furthermore, the liquid tank also includes a rectifier plate, which is arranged along the axial direction of the primary roller. One end of the rectifier plate is rotatably arranged, and the other end of the rectifier plate extends above the guide plate and forms a gap with the guide plate. The rectifier plate can swing under the impact of the mixed liquid and change the distance between the rectifier plate and the guide plate.

[0015] Furthermore, the production system also includes a dewatering roller, which is opposite to the first adsorption zone of the first outer cylinder of the primary roller. The dewatering roller is used to cooperate with the primary roller to squeeze out the moisture in the magnetic material adsorbed on the outer surface of the primary roller.

[0016] This invention separates magnetic substances in a mixture by employing two cooperating rollers, eliminating the need for scraping the adsorbed magnetic substances off the magnetic roller using a scraper, a common method in existing technologies. The stronger magnetic adsorption force of the secondary rollers allows for effective separation of the magnetic substances, preventing wear on the primary roller and improving its lifespan and adsorption quality. For example, the permanent magnet magnetic roller patent applied for by Sinosteel Tiancheng Environmental Protection Technology Co., Ltd. achieves highly efficient sorting and significantly improves resource recovery rates through the cooperation of two magnetic rollers. Furthermore, the gap between the primary and secondary rollers in this embodiment allows moisture carried by the magnetic substances to fall through, reducing the moisture content of the recovered magnetic substances and decreasing processing time and economic costs.

[0017] These features and advantages of this utility model will be disclosed in detail in the following specific embodiments and accompanying drawings. The preferred embodiments or means of this utility model will be shown in detail in conjunction with the accompanying drawings, but are not intended to limit the technical solutions of this utility model. In addition, each of these features, elements and components appearing in the following text and drawings is multiple and is labeled with different symbols or numbers for convenience, but all represent parts with the same or similar structure or function. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings:

[0019] Figure 1 This is a schematic diagram of the overall system according to one embodiment of the present invention;

[0020] Figure 2 This is a schematic diagram of the main view structure of the roller according to one embodiment of the present utility model;

[0021] Figure 3 This is a schematic side cross-sectional view of the roller according to one embodiment of the present invention;

[0022] Figure 4This is a schematic diagram of the overall system (multiple secondary rollers) according to one embodiment of the present invention.

[0023] in,

[0024] 10. Primary roller; 11. First inner cylinder; 12. First outer cylinder;

[0025] 20. Secondary roller; 21. Second inner cylinder; 22. Second outer cylinder;

[0026] 30. Receiving plate;

[0027] 40. Liquid tank; 41. Flow deflector; 42. Arc-shaped plate; 43. Flow straightener; 44. Gap adjustment plate;

[0028] 50. Dewatering roller;

[0029] 60. Magnetic block;

[0030] 70. Mixture; 71. Magnetic substance;

[0031] 80. Carbon brush ring;

[0032] 101. Processor; 102. Memory; 103. I / O interface; 104. Bus. Detailed Implementation

[0033] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described are intended to explain this utility model and should not be construed as limiting it.

[0034] The terms "an embodiment," "example," or "trademark" used in this specification refer to a particular feature, structure, or characteristic described in connection with the embodiment itself that may be included in at least one embodiment disclosed in this utility model. The phrase "in one embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment.

[0035] See appendix Figures 1 to 4One embodiment of this utility model discloses a magnetic separation device, including a liquid tank 40, a primary roller 10, and at least one secondary roller 20. The primary roller 10 is magnetic and can adsorb magnetic substances from the mixture onto its outer surface. The outer surface of the secondary roller 20 is opposite to that of the primary roller 10. The secondary roller 20 is magnetic and can adsorb magnetic substances from the outer surface of the primary roller 10. A first predetermined distance is formed between the outer surfaces of the primary roller 10 and the secondary roller 20. An inlet is formed between the liquid tank 40 and the outer surface of the primary roller. The magnetic separation device also includes a gap adjustment plate 44 disposed on the liquid tank 40. The gap adjustment plate 44 is slidably disposed on the liquid tank 40, and one end of the gap adjustment plate 44 extends into the inlet. The sliding of the gap adjustment plate 44 can change the area of ​​obstruction to the inlet.

[0036] In this embodiment, the primary roller 10, as the core component of the magnetic separator, directly contacts the mixture to be separated. This mixture may be a solid mixture (containing magnetic material 71 and non-magnetic material 71) or a solid-liquid mixture (magnetic material 71 and liquid). The primary roller 10 is magnetic and can attract the magnetic material 71 from the mixture onto its surface using a magnetic field. As the roller rotates, the attracted magnetic material 71 is carried away from the mixture, thus achieving separation.

[0037] The following embodiment uses the magnetic material 71 in the mixture 70 as an example to illustrate the specific solution.

[0038] In this embodiment, the secondary roller 20 generally does not come into direct contact with the solid-liquid mixture during use. During use, it is generally only necessary to maintain the relative positional relationship between the secondary roller 20 and the primary roller 10. The secondary roller 20 can replace the function of the scraper in the prior art. The secondary roller 20 in this embodiment is also magnetic. During use, the secondary roller 20 can attract the magnetic material 71 on the outer surface of the primary roller 10 to the outer surface of the secondary roller 20 without contacting the primary roller 10. This can avoid wear of the primary roller 10, improve the service life of the primary roller 10, and also prevent the magnetic material 71 or other impurities from adhering in the wear gaps of the primary roller 10.

[0039] In this embodiment, there is a certain gap d between the primary roller 10 and the secondary roller 20, as shown in the attached figure. Figure 1As shown, the magnetic material 71 will converge between the primary roller 10 and the secondary roller 20 and will eventually be carried away by the secondary roller 20 to achieve separation. At the convergence point of the magnetic material 71, water can flow back into the mixture 70 through the gap between the primary roller 10 and the secondary roller 20. This can reduce the water content of the separated magnetic material 71, thereby improving the efficiency of subsequent processing of the magnetic material 71 (such as drying).

[0040] In practical use, the moisture content of the magnetic material 71 separated by the magnetic separation device is generally less than 25%. In actual use, the distance between the primary roller 10 and the secondary roller 20 can be adjusted according to the moisture content. Increasing the distance makes it easier for the moisture in the magnetic material 71 collected between the primary roller 10 and the secondary roller 20 to flow out and return to the mixture 70. However, increasing the distance also makes it easier for some smaller magnetic materials 71 to detach, thus affecting the recovery efficiency. Therefore, in practical use, a balance between moisture content and recovery efficiency can be achieved by adjusting the distance between the primary roller 10 and the secondary roller 20.

[0041] In this embodiment, the specific shape and structure of the liquid tank are not specifically limited.

[0042] In this embodiment, the rotation direction between the primary roller 10 and the secondary roller 20 can be set to be the same, so that at the junction of the two (e.g. Figure 1 As shown), their linear velocities are in opposite directions, which can compress and aggregate the magnetic material 71, thereby making it easier for the water carried by the magnetic material 71 to be discharged and reducing the water content of the separated magnetic material 71.

[0043] It should be noted that this invention does not specifically limit how the primary roller 10 and the secondary roller 20 are magnetic. The rollers themselves can be configured to be magnetic, or they can be configured with an inner and outer roller combination, with a magnetic structure inside. Of course, the magnetic structure can be a permanent magnet. Alternatively, magnetism can be generated using an electromagnet.

[0044] Existing magnetic rollers using ferrite or similar materials exhibit weak magnetism, failing to attract large magnetic impurities. While neodymium iron boron (NdFeB) materials offer stronger magnetism, their overall material cost is higher, and the minimum required magnetic force varies depending on the application. Selecting different magnet materials for each machine to produce the same specifications of magnetic rollers increases design and production costs, resulting in a long production cycle. Therefore, using electromagnets better adapts to different application environments and reduces costs.

[0045] As one embodiment of this utility model, see the appendix. Figure 1The first-stage roller 10 includes a first inner cylinder 11 and a first outer cylinder 12. The first outer cylinder 12 is sleeved on the outside of the first inner cylinder 11. The first inner cylinder 11 has a non-magnetic first separation area and a magnetic first adsorption area on the outer surface of the first outer cylinder 12. The first adsorption area is used to adsorb magnetic material 71.

[0046] The secondary roller 20 includes a second inner cylinder 21 and a second outer cylinder 22. The second outer cylinder 22 is sleeved on the outside of the second inner cylinder 21 and can rotate relative to the second inner cylinder 21. The second inner cylinder 21 has a non-magnetic second separation area and a magnetic second adsorption area on the outer surface of the second outer cylinder 22. The second adsorption area and the first separation area are opposite to each other. The outer surface of the second outer cylinder 22 and the outer surface of the first outer cylinder 12 form the set distance. The first outer cylinder 12 and the second outer cylinder 22 rotate in the same direction.

[0047] In this embodiment, the primary roller 10 and the secondary roller 20 have similar structures. Both include a fixed inner cylinder and a movable outer cylinder. In use, the first outer cylinder 12 and the second outer cylinder 22 can rotate around the corresponding first inner cylinder 11 and the second inner cylinder 21. The first inner cylinder 11 and the second inner cylinder 21 are magnetic, while the first outer cylinder 12 and the second outer cylinder 22 themselves are not magnetic. When separating the magnetic material 71, the magnetic material 71 is adsorbed onto the outer surface of the first outer cylinder 12 and the second outer cylinder 22 by the magnetism of the first inner cylinder 11 and the second inner cylinder 21.

[0048] In this embodiment, the first inner cylinder 11 and the second inner cylinder 21 can be magnetically attached to the entire circumference in the circumferential direction, or they can be magnetically attached within a certain angular range. See Appendix. Figure 1 In this utility model, the angle between the first inner cylinder 11 and the second inner cylinder 21 in the circumferential direction is less than 360°. In this way, during use, a magnetic area and a non-magnetic area will be formed in the circumferential direction. The part of the first outer cylinder 12 corresponding to the magnetic area of ​​the first inner cylinder 11 forms the first adsorption area in this embodiment, and the part corresponding to the non-magnetic area of ​​the first inner cylinder 11 forms the first separation area in this embodiment.

[0049] In actual use, the part corresponding to the magnetic area of ​​the first inner cylinder 11 can be directly immersed in the mixture 70. During the rotation of the first outer cylinder 12, the magnetic material 71 in the mixture 70 can be adsorbed on the outer surface of the first outer cylinder 12 in the first adsorption area. As the first outer cylinder 12 rotates, the magnetic material 71 on its outer surface rotates together with it. When the magnetic material 71 on the first outer cylinder 12 rotates to the position corresponding to the non-magnetic area of ​​the first inner cylinder 11, the magnetic adsorption effect on the magnetic material 71 on the outer surface of the first outer cylinder 12 disappears, which facilitates the detachment of the magnetic material 71 from the outer surface of the first outer cylinder 12.

[0050] For practical use, please refer to the appendix. Figure 1 In this embodiment, the angle θ1 of the magnetic region of the first inner cylinder 11 is set to 250°, and the corresponding angle θ2 of the non-magnetic region is 110°. It can be seen that the magnetic region of the first inner cylinder 11 is larger than the non-magnetic region, which increases the adsorption area of ​​the primary roller 10 and improves adsorption efficiency. Of course, in actual settings, the angle θ1 of the magnetic region of the first inner cylinder 11 can be set to 180°-270°. It should be noted that in this embodiment, the presence of a magnetic region in the first inner cylinder 11 does not mean that the magnetic region needs to completely cover the entire magnetic region (i.e., it does not mean that a fully magnetic region will be formed). The magnetic regions can also be spaced out (within the magnetic intervals, there is no magnetism), as shown in the attached figure. Figure 1 , 2 As shown, the magnetic blocks 60 are arranged at intervals on the circumference of the drum. In actual design, the size of the interval can be rationally designed to ensure that when the magnetic material 71 moves to the relative position of the interval, it will not detach from the first outer cylinder 12 under the adsorption of the adjacent magnetic areas. Such a setting can reduce the distribution range of the magnetic force, thereby reducing the cost.

[0051] Similarly, in this embodiment, the second inner cylinder 21 in the secondary roller 20 can be configured with a similar structure to the first inner cylinder 11, see Appendix. Figure 1 However, in actual installation, the angle range occupied by the magnetic region of the second inner cylinder 21 can be relatively small, while the angle range of the non-magnetic region can be larger. In this embodiment, the angle α1 of the magnetic region of the second inner cylinder 21 can be set as shown in the attached figure. Figure 1 In the 120°, the non-magnetic zone α2 can be set to 240°. It can be seen that the difference between the second inner cylinder 21 and the first inner cylinder 11 lies in the distribution angle of the magnetic zone and the non-magnetic zone. The angle of the magnetic zone of the second inner cylinder 21 is smaller than that of the magnetic zone of the first inner cylinder 11, which makes it easier for the magnetic material 71 to detach from the outer surface of the secondary roller 20.

[0052] As can be seen from the above, in this embodiment, the first inner cylinder 11 and the second inner cylinder 21 form a notch area on the cylinder body through the setting of the cylinder body itself, thereby forming a non-magnetic area. In actual installation, the first inner cylinder 11 and the second inner cylinder 21 can also be set as a circumferentially closed cylinder structure, and circumferentially distributed electromagnets are set on the entire cylinder structure. In use, it is only necessary to energize the electromagnets within a certain angle range as needed, and not energize the other part to produce the same effect as the above-mentioned magnetic area and non-magnetic area. Such a setting has lower installation requirements for the first-stage roller 10 and the second-stage roller 20.

[0053] In this embodiment, during actual setup, it is necessary to ensure that the magnetism of the secondary roller 20 at its relative position to the primary roller 10 is greater than that of the primary roller 10 at its corresponding position (i.e., the magnetism of the second adsorption zone is greater than that of the first separation zone in this embodiment). However, since the angle of the rollers is generally not very large in actual use, and the first outer cylinder 12 may still have a certain magnetism in the first separation zone due to magnetization, the magnetic material 71 in the first separation zone may still be subject to magnetic adsorption (due to the self-magnetization of the first outer cylinder 12 and the long-distance adsorption effect of the first adsorption zone). Therefore, the magnetism of the secondary roller 20 can be set to be greater than that of the primary roller 10. This ensures that the secondary roller 20 can successfully adsorb the magnetic material 71 on the primary roller 10, thereby improving the separation effect.

[0054] Since both the primary roller 10 and the secondary roller 20 in this embodiment are structures consisting of a fixed cylinder and a movable outer cylinder, carbon brush rings 80 can be used to ensure better power supply.

[0055] It should be noted that in actual settings, as shown in the attached document... Figure 1 As shown, the diameter of the secondary roller 20 in this application can be set to be smaller than the diameter of the primary roller 10, so that the secondary roller 20 is easy to replace during use.

[0056] As one embodiment of this utility model, see the appendix. Figure 1 The magnetic separation device further includes a receiving plate 30 that is matched with the secondary roller 20. The receiving plate 30 is arranged along the axial direction of the second outer cylinder 22. One end of the receiving plate 30 is opposite to the second separation zone and forms a gap with the outer surface of the second outer cylinder 22.

[0057] In this embodiment, the receiving plate 30 is used in conjunction with the secondary roller 20. The receiving plate 30 does not directly contact the outer surface of the second outer cylinder 22 of the secondary roller 20. The separation of the magnetic material 71 from the outer surface of the secondary roller 20 relies solely on the gravity of the magnetic material 71 itself. Figure 1 , 4As can be seen from the figure, the receiving plate 30 in this embodiment is set to a horizontal state during use, and is positioned below the center horizontal plane of the secondary roller 20, corresponding to the position of the second separation zone of the secondary roller 20. When the magnetic material 71 moves to the second separation zone with the second outer cylinder 22, the magnetic material 71 loses its magnetic attraction and can fall well onto the receiving plate 30 under its own gravity, thereby achieving the separation of the magnetic material 71. In addition, it should be noted that, as can be seen from the figure, the rotation of the secondary roller 20 itself in this embodiment can also better separate the magnetic material 71 on the secondary roller 20 through centrifugal force.

[0058] In one embodiment of this utility model, the first outer cylinder 12 of the primary roller 10 is made of a non-metallic material. Compared with metal or stainless steel, non-metallic materials not only lack magnetism but also exhibit higher wear resistance, which helps the primary roller 10 easily release the adsorbed magnetic material 71 and extends its service life.

[0059] As a specific example of this utility model, we set the range of the first spacing d to be 0 to 5 millimeters.

[0060] This embodiment limits the distance between the primary roller 10 and the secondary roller 20. As mentioned above, the distance affects the moisture content and the adsorption of magnetic material 71. Based on the relationship between the roller body bending moment and the roller shaft bending moment, this utility model optimizes the range of the first set distance d to 0-5mm to ensure the adsorption efficiency of magnetic material 71 and the load-bearing capacity of the roller in different scenarios.

[0061] As one embodiment of this utility model, see the appendix. Figure 4 The number of the secondary rollers 20 is set to multiple, and the multiple secondary rollers 20 are arranged side by side in sequence along the radial direction of the rollers.

[0062] In this embodiment, the positional relationship between the multiple secondary rollers 20 is similar to that between the first secondary roller 20 and the first-level roller 10. This is equivalent to allowing the magnetic material 71 to pass through the multiple secondary rollers 20 for adsorption and separation in sequence. During each exchange of magnetic material 71 between rollers, the water in the magnetic material 71 will be discharged once, thereby better reducing the water content of the separated magnetic material 71.

[0063] The second aspect of this application discloses a production system, see appendix. Figure 1 The production system further includes a magnetic separation device in the first aspect, wherein the input end of the liquid tank 40 is connected to the waste discharge port of the production equipment, and at least a portion of the magnetic outer surface of the primary roller 10 is immersed in the mixture in the liquid tank 40, and a gap is formed between the roller 10 and the bottom surface of the liquid tank 40.

[0064] In this embodiment, a portion of the primary roller 10 is immersed in the mixture 70, which allows for better adsorption of the magnetic material 71 deposited at the bottom of the liquid tank 40. The secondary roller 20 is positioned outside the mixture and works in conjunction with the primary roller 10 to effectively separate the magnetic material 71 from the mixture 70.

[0065] In one embodiment of this utility model, the liquid tank 40 includes a guide plate 41 and an arc plate 42. The first end of the guide plate 41 is connected to the waste discharge port of the production equipment, and the second end of the guide plate 41 is connected to the arc plate 42. A recess is formed on the arc plate 42 that matches the outer surface of the primary roller 10. The portion of the primary roller 10 immersed in the liquid tank 40 is opposite to the recess. A liquid inlet is formed between the outer surface of the primary roller 10 and the second end of the guide plate 41. The gap adjustment plate 44 is arranged along the axial direction of the primary roller 10 and is movably arranged on the guide plate 41. The sliding of the gap adjustment plate 44 can adjust the blocking area of ​​the liquid inlet.

[0066] In this embodiment, a recessed portion is formed in the liquid tank 40 that matches the outer surface of the primary roller 10. The overall shape of the recess is an arc-shaped structure that matches the outer surface of the primary roller 10. This increases the contact area between the primary roller 10 and the bottom of the liquid tank 40, thereby increasing the adsorption area and ultimately enhancing the adsorption efficiency.

[0067] In this embodiment, the guide plate 41 can be configured as shown in the attached figure. Figure 1 The structure shown has a certain angle, so that the mixed liquid 70 produced by the production equipment can flow more smoothly toward the primary roller 10 and converge. It can be seen that an opening is formed between the end of the guide plate 41 and the outer surface of the first outer cylinder 12 of the primary roller 10. This opening forms a liquid inlet. The size of the opening determines the flow rate of the mixed liquid 70 flowing through the outer surface of the primary roller 10. In this embodiment, a movable gap adjustment plate 44 is provided on the guide plate 41. During use, the size of the liquid inlet can be adjusted by the gap adjustment plate 44, thereby controlling the flow rate through the primary roller 10 and avoiding the problem of poor adsorption efficiency of the primary roller 10 due to excessive flow.

[0068] As one embodiment of this utility model, see the appendix. Figure 1 , 2 The liquid tank 40 also includes a flow rectifier plate 43, which is arranged along the axial direction of the primary roller 10. One end of the flow rectifier plate 43 is rotatably arranged, and the other end of the flow rectifier plate 43 extends above the guide plate 41 and forms a gap with the guide plate 41. The flow rectifier plate 43 can swing under the impact of the mixed liquid and change the distance between the flow rectifier plate 43 and the guide plate 41.

[0069] In this embodiment, the rectifier plate 43 is arranged along the axial direction of the primary roller 10. Its main function is to ensure that the mixture 70 is evenly distributed along the axial direction of the primary roller 10 when it flows. This is because after the mixture 70 is discharged from the waste discharge port of the production equipment, the water flow generally only flows within a certain width range. However, the primary roller 10 in this embodiment has a certain length along the axial direction. In the actual working environment, without the rectifier plate 43, the mixture 70 may only flow through a local part of the primary roller 10 and cannot completely cover the entire axial length of the primary roller 10. As a result, the primary roller 10 cannot achieve the maximum adsorption efficiency.

[0070] In this embodiment, a rectifier plate 43 is provided. The mixed liquid 70 at the inlet side of the rectifier plate 43 flows along the axial direction of the primary roller 10, thereby making the liquid flow of the mixed liquid 70 uniformly distributed throughout the entire axial length of the primary roller 10. As a result, the mixed liquid 70 flows through the entire length of the primary roller 10, meaning that the entire outer surface of the primary roller 10 can be adsorbed by the magnetic material 71, thus avoiding the problem of low separation efficiency caused by the mixed liquid 70 being concentrated in only a local position.

[0071] In this embodiment, the rectifier plate 43 can also swing according to the magnitude of the water flow impact force. The swinging of the rectifier plate 43 can also adjust the distance between the rectifier plate 43 and the guide plate. The adjustment of this distance can also control the flow rate and achieve a better magnetic separation effect.

[0072] As one embodiment of this utility model, see the appendix. Figure 1 , 3 The production system also includes a dewatering roller 50, which is opposite to the first adsorption zone of the first outer cylinder 12 of the first-stage roller 10. The dewatering roller 50 is used to cooperate with the first-stage roller 10 to squeeze out the moisture in the magnetic material 71 adsorbed on the outer surface of the first-stage roller 10.

[0073] In actual use, the extrusion rollers work in conjunction with the primary roller 10 to generate extrusion pressure on the magnetic material 71, which helps to remove the moisture carried by the magnetic material 71 and can better reduce the moisture content of the separated magnetic material 71. In actual use, the number of extrusion rollers can be set to multiple, and the multiple extrusion rollers are distributed at intervals along the circumference of the primary roller 10. The multiple extrusion rollers can be set to form different spacings with the outer surface of the primary roller 10 to achieve multi-level extrusion.

[0074] To further improve the squeezing drainage efficiency, this utility model considers adding an elastic component between the squeezing roller and the first-stage roller 10, or between the second-stage roller 20 and the first-stage roller 10, to achieve a better squeezing drainage effect by utilizing the elastic force.

[0075] This invention separates the magnetic material 71 from the mixture 70 using two cooperating rollers. This eliminates the need for the existing structure where the magnetic material 71 is scraped off the magnetic roller by a scraper. The secondary roller 20, with its stronger magnetic adsorption, separates the magnetic material 71, avoiding wear on the primary roller 10 and improving its lifespan and adsorption quality. Furthermore, the gap between the primary roller 10 and the secondary roller 20 allows moisture carried by the magnetic material 71 to fall through, reducing the moisture content of the recovered magnetic material 71 and decreasing processing time and economic costs.

[0076] The above are merely specific embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Those skilled in the art should understand that this utility model includes, but is not limited to, the contents described in the accompanying drawings and the specific embodiments above. Any modifications that do not depart from the functional and structural principles of this utility model will be included within the scope of the claims.

Claims

1. A magnetic separation device, characterized in that, The device includes a liquid tank (40), a primary roller (10), and at least one secondary roller (20). The primary roller (10) is magnetic and can adsorb magnetic substances from the mixture onto its outer surface. The outer surface of the secondary roller (20) is opposite to that of the primary roller (10). The secondary roller (20) is magnetic and can adsorb magnetic substances from the outer surface of the primary roller (10). A first predetermined distance is formed between the outer surfaces of the primary roller (10) and the secondary roller (20). An inlet is formed between the liquid tank (40) and the outer surface of the primary roller. The magnetic separation device also includes a gap adjustment plate (44) disposed on the liquid tank (40). The gap adjustment plate (44) is slidably disposed on the liquid tank (40), and one end of the gap adjustment plate (44) extends into the inlet. The sliding of the gap adjustment plate (44) can change the area of ​​obstruction to the inlet.

2. The magnetic separation device as described in claim 1, characterized in that, The first-stage roller (10) includes a first inner cylinder (11) and a first outer cylinder (12). The first outer cylinder (12) is sleeved on the outside of the first inner cylinder (11). The first inner cylinder (11) forms a non-magnetic first separation zone and a magnetic first adsorption zone on the outer surface of the first outer cylinder (12). The first adsorption zone is used to adsorb magnetic substances (71). The secondary roller (20) includes a second inner cylinder (21) and a second outer cylinder (22). The second outer cylinder (22) is sleeved on the outside of the second inner cylinder (21) and can rotate relative to the second inner cylinder (21). The second inner cylinder (21) forms a non-magnetic second separation area and a magnetic second adsorption area on the outer surface of the second outer cylinder (22). The second adsorption area and the first separation area are opposite to each other. The outer surface of the second outer cylinder (22) and the outer surface of the first outer cylinder (12) form the set distance. The rotation directions of the first outer cylinder (12) and the second outer cylinder (22) are the same.

3. The magnetic separation device as described in claim 2, characterized in that, The magnetic separation device also includes a receiving plate (30) that is matched with the secondary roller (20). The receiving plate (30) is arranged along the axial direction of the second outer cylinder (22). One end of the receiving plate (30) is opposite to the second separation zone and forms a gap with the outer surface of the second outer cylinder (22).

4. The magnetic separation device according to any one of claims 1 to 3, characterized in that, The first outer cylinder (12) of the primary roller (10) is made of non-metallic material.

5. The magnetic separation device according to any one of claims 1 to 3, characterized in that, The first set spacing is between 0 and 5 mm.

6. The magnetic separation device according to any one of claims 1 to 3, characterized in that, The number of the secondary rollers (20) is set to be multiple, and the multiple secondary rollers (20) are arranged side by side in sequence along the radial direction of the rollers.

7. A production system, comprising production equipment, characterized in that, The production system further includes a magnetic separation device according to any one of claims 1 to 6, wherein the input end of the liquid tank (40) is connected to the waste discharge port of the production equipment, and at least a portion of the magnetic outer surface of the primary roller (10) is immersed in the mixture in the liquid tank (40) and forms a gap with the bottom surface of the liquid tank (40).

8. The production system as described in claim 7, characterized in that, The liquid tank (40) includes a guide plate (41) and an arc plate (42). The first end of the guide plate (41) is connected to the waste discharge port of the production equipment, and the second end of the guide plate (41) is connected to the arc plate (42). A recess is formed on the arc plate (42) that matches the outer surface of the primary roller (10). The portion of the primary roller (10) immersed in the liquid tank (40) is opposite to the recess. An inlet is formed between the outer surface of the primary roller (10) and the second end of the guide plate (41). The gap adjustment plate (44) is arranged along the axial direction of the primary roller (10) and is movably arranged on the guide plate (41). The sliding of the gap adjustment plate (44) can adjust the blocking area of ​​the inlet.

9. The production system as described in claim 8, characterized in that, The liquid tank (40) also includes a rectifier plate (43), which is arranged along the axial direction of the first-stage roller (10). One end of the rectifier plate (43) is rotatably arranged, and the other end of the rectifier plate (43) extends above the guide plate (41) and forms a gap with the guide plate (41). The rectifier plate (43) can swing under the impact of the mixed liquid and change the gap between the rectifier plate (43) and the guide plate (41).

10. The production system according to any one of claims 7 to 9, characterized in that, The production system also includes a dewatering roller (50), which is opposite to the first adsorption zone of the first outer cylinder (12) of the first primary roller (10). The dewatering roller (50) is used to cooperate with the first primary roller (10) to squeeze out the moisture in the magnetic material (71) adsorbed on the outer surface of the first primary roller (10).

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