Magnetic separation device and production system

Abstract

The invention relates to the technical field of magnetic separation equipment, in particular to a magnetic separation device and a production system. The magnetic separation device comprises a liquid inlet tank, a first-stage roller and a second-stage roller, the first-stage roller comprises a first magnetic roller and a first outer cylinder; the first magnetic roller is fixedly arranged in the first outer cylinder, the first outer cylinder is rotatably arranged, the first magnetic roller forms a first magnetic suction area and a first non-magnetic area on the surface of the first outer cylinder, and the first magnetic suction area is used for adsorbing magnetic impurities; the second-stage roller comprises a second magnetic roller and a second outer cylinder, the second magnetic roller is fixedly arranged in the second outer cylinder, the second outer cylinder is rotatably arranged, and the second magnetic roller forms a second magnetic suction area and a second non-magnetic area on the surface of the second outer cylinder; a connecting line of any point on the axis of the second-stage roller and any point on the axis of the first-stage roller passes through the second magnetic suction area and the first non-magnetic area, so that magnetic impurities adsorbed by the first-stage roller can be transferred to the second-stage roller; and the first outer cylinder and the second outer cylinder can also play a role in squeezing.

Description

Technical Field

[0001] The present invention relates to the technical field of magnetic separation equipment, and in particular to a magnetic separation device and a production system. Background Art

[0002] The magnetic separation device is used to separate magnetic impurities from liquids. It generally includes a magnetic inner cylinder, a non-magnetic metal outer cylinder mounted outside the magnetic inner cylinder, and a scraper. When in use, the metal outer cylinder is driven to rotate by a motor, and the magnetic impurities in the working liquid are adsorbed on the surface of the metal outer cylinder and are taken out of the working liquid by the rotating metal outer cylinder. The magnetic impurities are then scraped off and recovered by the scraper.

[0003] When the above-mentioned magnetic separation device is in use, the scraper can be in direct contact with the surface of the metal outer cylinder, or the scraper and the metal outer cylinder can be set at an interval; when the scraper is in direct contact with the surface of the metal outer cylinder, it will cause the surface of the metal outer cylinder and / or the scraper to wear, and manual regular adjustment is required after a certain period of use; when the scraper is set at an interval from the surface of the metal outer cylinder, there is a problem that the magnetic impurities on the surface of the metal outer cylinder cannot be scraped off smoothly, resulting in the magnetic impurities rotating twice with the metal outer cylinder, affecting the subsequent adsorption of magnetic impurities in the liquid. Summary of the invention

[0004] (I) The problem to be solved by the present invention is that the existing magnetic separation device uses a scraper to scrape off the magnetic impurities on the surface of the metal outer cylinder, and the actual use effect is poor.

[0005] (II) Technical solution In order to solve the above technical problems, an embodiment of the present invention provides a magnetic separation device, comprising: a liquid inlet tank for receiving a working liquid containing magnetic impurities, and a primary roller and a secondary roller arranged in sequence; The first-level roller includes a first magnetic roller and a first outer cylinder; the first magnetic roller is fixed in the first outer cylinder, the first outer cylinder can rotate relative to the first magnetic roller, the first magnetic roller forms a first magnetic attraction area and a first non-magnetic area on the surface of the first outer cylinder, and the first magnetic attraction area is used to absorb magnetic impurities; The secondary roller includes a second magnetic roller and a second outer cylinder, the second magnetic roller is fixed in the second outer cylinder, the second outer cylinder can rotate relative to the second magnetic roller, and the second magnetic roller forms a second magnetic attraction area and a second non-magnetic area on the surface of the second outer cylinder; a line connecting any point on the axis of the secondary roller and any point on the axis of the primary roller passes through the second magnetic attraction area and the first non-magnetic area.

[0006] Furthermore, a recessed structure matching the first outer cylinder is provided at the bottom of the liquid inlet tank, and the first outer cylinder is partially located in the recessed structure.

[0007] Furthermore, the first outer cylinder and the second outer cylinder rotate in opposite directions.

[0008] Furthermore, along the rotation direction of the second outer cylinder, the magnetism of the second magnetic roller is enhanced.

[0009] Furthermore, the magnetism of the portion of the first magnetic attraction area in contact with the working fluid is stronger than the magnetism of the remaining portion of the first magnetic attraction area.

[0010] Furthermore, a plane rectangular coordinate system is formed with any point on the axis of the first-stage roller as the origin, the horizontal direction as the x-axis, the vertical direction as the y-axis, the working fluid flow direction as the positive direction of the x-axis, and the vertical upward direction as the positive direction of the y-axis; the axis of the second-stage roller is located in the first quadrant of the plane rectangular coordinate system.

[0011] Furthermore, a water baffle is provided at the liquid inlet end of the liquid inlet groove; and the end of the water baffle away from the liquid inlet groove is rotatably arranged so that the water baffle can swing with the impact of the working fluid.

[0012] Furthermore, it also includes an adjustment component; the adjustment component is used to adjust the gap between the first outer cylinder and the second outer cylinder.

[0013] Furthermore, the adjustment component includes an elastic member; both ends of the elastic member are rotatably connected to the rotating shafts of the first outer cylinder and the second outer cylinder respectively.

[0014] Another embodiment of the present invention further provides a production system, comprising the magnetic separation device described in any of the above embodiments.

[0015] Beneficial effects of the present invention: A magnetic separation device provided by the present invention comprises: a liquid inlet tank for receiving a working fluid containing magnetic impurities, and a primary roller and a secondary roller arranged in sequence; the primary roller comprises a first magnetic roller and a first outer cylinder; the first magnetic roller is fixedly arranged in the first outer cylinder, the first outer cylinder can rotate relative to the first magnetic roller, the first magnetic roller forms a first magnetic attraction area and a first non-magnetic area on the surface of the first outer cylinder, the first magnetic attraction area is used to absorb magnetic impurities; the secondary roller comprises a second magnetic roller and a second outer cylinder, the second magnetic roller is fixedly arranged in the second outer cylinder, the second outer cylinder can rotate relative to the second magnetic roller, the second magnetic roller forms a second magnetic attraction area and a second non-magnetic area on the surface of the second outer cylinder; a line connecting any point on the axis of the secondary roller and any point on the axis of the primary roller passes through the second magnetic attraction area and the first non-magnetic area. By arranging the first magnetic attraction area and the first non-magnetic area on the first outer cylinder and cooperating with the second magnetic attraction area and the second non-magnetic area on the second outer cylinder, the magnetic impurities adsorbed by the first roller can be transferred to the second roller, and no magnetic interference will occur during the transfer of the magnetic impurities, so that the transfer of the magnetic impurities is more thorough; at the same time, the mutual squeezing of the first outer cylinder and the second outer cylinder can also play a squeezing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 A schematic diagram of the structure of a magnetic separation device provided in an embodiment of the present invention; Figure 2 A schematic diagram of the structure of a primary roller provided in an embodiment of the present invention; Figure 3 A schematic diagram of the structure of a secondary roller provided in an embodiment of the present invention; Figure 4 A schematic structural diagram of a first magnetic roller provided in an embodiment of the present invention.

[0018] Icons: 1-liquid inlet tank; 2-first roller; 21-first magnetic roller; 22-first outer cylinder; 23-first magnetic attraction zone; 24-first non-magnetic zone; 3-second roller; 31-second magnetic roller; 32-second outer cylinder; 33-second magnetic attraction zone; 34-second non-magnetic zone; 4-water baffle. DETAILED DESCRIPTION

[0019] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] like Figures 1 to 4As shown, an embodiment of the present invention provides a magnetic separation device, comprising: a liquid inlet tank 1 for receiving a working fluid containing magnetic impurities, and a primary roller 2 and a secondary roller 3 arranged in sequence; the primary roller 2 comprises a first magnetic roller 21 and a first outer cylinder 22; the first magnetic roller 21 is fixedly arranged in the first outer cylinder 22, the first outer cylinder 22 can rotate relative to the first magnetic roller 21, the first magnetic roller 21 forms a first magnetic attraction area 23 and a first non-magnetic area 24 on the surface of the first outer cylinder 22, and the first magnetic attraction area 23 is used to absorb magnetic impurities; the secondary roller 3 comprises a second magnetic roller 31 and a second outer cylinder 32, the second magnetic roller 31 is fixedly arranged in the second outer cylinder 32, the second outer cylinder 32 can rotate relative to the second magnetic roller 31, and the second magnetic roller 31 forms a second magnetic attraction area 33 and a second non-magnetic area 34 on the surface of the second outer cylinder 32; a line connecting any point on the axis of the secondary roller 3 and any point on the axis of the primary roller 2 passes through the second magnetic attraction area 33 and the first non-magnetic area 24.

[0021] The magnetic separation device provided in this embodiment is used to separate magnetic impurities in the working fluid, such as magnetic iron oxides or iron sand, etc.; the working fluid can come from the sheet surface treatment equipment. The magnetic separation device includes a liquid inlet tank 1, a primary roller 2 and a secondary roller 3. The liquid inlet tank 1 has a liquid inlet end and a liquid outlet end. The working fluid from the upstream equipment enters the liquid inlet tank 1 through the liquid inlet end of the liquid inlet tank 1. After being processed by the primary roller 2 and the secondary roller 3 to remove the magnetic impurities therein, the obtained filtrate is discharged from the liquid outlet end of the liquid inlet tank 1 and enters the subsequent pool body for subsequent processes; the primary roller 2 and the secondary roller 3 are arranged in sequence, that is, the axes of the primary roller 2 and the secondary roller 3 are parallel, and the axes are the center lines of the primary roller 2 and the secondary roller 3. Moreover, there is a certain gap between the primary roller 2 and the secondary roller 3, and specifically, there is a certain gap between the first outer cylinder 22 of the primary roller 2 and the second outer cylinder 32 of the secondary roller 3, so that the magnetic impurities adsorbed by the primary roller 2 can pass through the area between the primary roller 2 and the secondary roller 3, and when the magnetic impurities pass through the area between the primary roller 2 and the secondary roller 3, the magnetic impurities can be transferred from the primary roller 2 to the secondary roller 3; when in use, the first outer cylinder 22 of the primary roller 2 and the second outer cylinder 32 of the secondary roller 3 rotate around their own axes.Specifically, in the present embodiment, the primary roller 2 comprises a first magnetic roller 21 and a first outer cylinder 22; the first outer cylinder 22 is sleeved on the outside of the first magnetic roller 21, and the first outer cylinder 22 is rotatable, and when the first outer cylinder 22 rotates, the first magnetic roller 21 will not rotate with the first outer cylinder 22, and the first magnetic roller 21 is fixedly arranged in the first outer cylinder 22; the material of the first outer cylinder 22 is a non-magnetic metal material, such as stainless steel, etc. Under the action of the first magnetic roller 21, the surface of the first outer cylinder 22 forms a first magnetic attraction area 23 that can absorb magnetic impurities and a first non-magnetic area 24 that is non-magnetic; optionally, the first magnetic roller 21 comprises a first main body and a plurality of magnets, the axial cross-section of the first main body is fan-shaped, and all the magnets are arranged in a matrix on the surface of the first main body, or the first main body is cylindrical, and a plurality of electromagnets are arranged in a matrix on the surface of the cylinder, and the electromagnets on the surface of the first main body are controlled to be on and off, so as to be able to Control the range of the first magnetic attraction area 23 and the first non-magnetic area 24 on the surface of the first outer cylinder 22; when the first main body is fan-shaped, the first magnetic attraction area 23 corresponds to the part of the first magnetic roller 21 provided with a magnet, and the first non-magnetic area 24 corresponds to the part of the first magnetic roller 21 not provided with a magnet; when the first main body is columnar, the first magnetic attraction area 23 corresponds to the electromagnet part that is energized, and the first non-magnetic area 24 corresponds to the electromagnet part that is not energized; since the first magnetic roller 21 does not rotate with the first outer cylinder 22 when the first outer cylinder 22 rotates, the positions of the above-mentioned first magnetic attraction area 23 and the first non-magnetic area 24 relative to the liquid inlet tank 1 are fixed; at least part of the first magnetic attraction area 23 of the first outer cylinder 22 is immersed in the liquid inlet tank 1, which is used to absorb magnetic impurities in the working fluid. After the magnetic impurities in the working fluid are absorbed to the surface of the first outer cylinder 22, they will rotate with the first outer cylinder 22, and when the magnetic impurities move to the first non-magnetic area 24, they will be separated from the first outer cylinder 22.The secondary roller 3 includes a second magnetic roller 31 and a second outer cylinder 32; the second outer cylinder 32 is sleeved on the outside of the second magnetic roller 31, and the second outer cylinder 32 can rotate. When the second outer cylinder 32 rotates, the second magnetic roller 31 will not rotate with the second outer cylinder 32, and the second magnetic roller 31 is fixedly arranged in the second outer cylinder 32; the material of the second outer cylinder 32 is a non-magnetic metal material, such as stainless steel, etc. Under the action of the second magnetic roller 31, the surface of the second outer cylinder 32 forms a second magnetic attraction area 33 that can absorb magnetic impurities and a second non-magnetic area 34 that is non-magnetic; optionally, the second magnetic roller 31 includes a second main body and a plurality of magnets, the axial cross-section of the second main body is fan-shaped, and all the magnets are arranged in a matrix form on the surface of the second main body, or the second main body It is cylindrical, and a number of electromagnets are arranged in a matrix on the surface of the cylinder. By controlling the power on and off of the electromagnets on the surface of the second main body, the range of the second magnetic attraction area 33 and the second non-magnetic area 34 on the surface of the second outer cylinder 32 can be controlled; when the second main body is fan-shaped, the second magnetic attraction area 33 corresponds to the part of the second magnetic roller 31 provided with a magnet, and the second non-magnetic area 34 corresponds to the part of the second magnetic roller 31 not provided with a magnet; when the first main body is cylindrical, the first magnetic attraction area 23 corresponds to the part of the electromagnet that is energized, and the first non-magnetic area 24 corresponds to the part of the electromagnet that is not energized; because the second magnetic roller 31 does not rotate with the second outer cylinder 32 when the second outer cylinder 32 rotates, the positions of the second magnetic attraction area 33 and the second non-magnetic area 34 relative to the liquid inlet tank 1 are fixed. Furthermore, in this embodiment, the line connecting any point on the axis of the first roller 2 and any point on the axis of the second roller 3 passes through the first non-magnetic zone 24 and the second magnetic attraction zone 33. Therefore, when in use, when the magnetic impurities adsorbed on the surface of the first outer cylinder 22 move from the first magnetic attraction zone 23 to the first non-magnetic zone 24 with the first outer cylinder 22, the first outer cylinder 22 no longer adsorbs the magnetic impurities, and at this time the magnetic impurities will be transferred to the second magnetic attraction zone 33 of the second outer cylinder 32 and rotate with the second outer cylinder 32. When the magnetic impurities on the surface of the second outer cylinder 32 move to the second non-magnetic zone 34 with the second outer cylinder 32, they will be separated from the second outer cylinder 32 for subsequent recycling. Moreover, through the cooperation between the first outer cylinder 22 and the second outer cylinder 32, the magnetic impurities can be squeezed out during the transfer of the magnetic impurities.

[0022] The magnetic separation device provided in this embodiment, when in use, cooperates with the second magnetic attraction zone 33 and the second non-magnetic zone 34 on the second outer cylinder 32 by arranging the first magnetic attraction zone 23 and the first non-magnetic zone 24 on the first outer cylinder 22, so that the magnetic impurities adsorbed by the primary roller 2 can be transferred to the secondary roller 3, and no magnetic interference will occur during the transfer of the magnetic impurities, and the transfer of the magnetic impurities is more thorough; at the same time, the mutual squeezing of the first outer cylinder 22 and the second outer cylinder 32 can also play a squeezing effect.

[0023] The magnetic separation device provided by the embodiment of the present invention is as follows: Figure 1As shown, a concave structure matching with the first outer cylinder 22 is provided at the bottom of the liquid inlet tank 1, and a part of the first outer cylinder 22 is located in the concave structure.

[0024] In this embodiment, an arc-shaped recessed structure matching the first outer cylinder 22 is disposed at the bottom of the liquid inlet tank 1. The first outer cylinder 22 is partially disposed in the recessed structure during assembly to improve the adsorption effect on magnetic impurities.

[0025] In the magnetic separation device provided by the embodiment of the present invention, the first outer cylinder 22 and the second outer cylinder 32 rotate in opposite directions, so as to facilitate the transfer of adsorbed magnetic impurities, improve the squeezing effect on the magnetic impurities, and promote the dehydration of the magnetic impurities. Moreover, the rotation speed of the first outer cylinder 22 and the second outer cylinder 32 is adjustable and independently adjustable, that is, the first outer cylinder 22 and the second outer cylinder 32 are each equipped with an independent drive motor for driving the first outer cylinder 22 and the second outer cylinder 32 to rotate; when in use, by adjusting the rotation speed of the first outer cylinder 22 and the second outer cylinder 32, the adsorption amount of the magnetic impurities can be adjusted, and finally the adjustment of the squeezing effect of the magnetic impurities is achieved.

[0026] In the magnetic separation device provided by the embodiment of the present invention, the magnetism of the second magnetic roller 31 is enhanced along the rotation direction of the second outer cylinder 32 .

[0027] In this embodiment, in order to increase the adsorption amount of the end of the second magnetic attraction area 33 along the rotation direction of the second outer cylinder 32 during use, the magnetism of the second magnetic roller 31 is enhanced along the rotation direction of the second outer cylinder 32. For example, the magnetism of the second magnetic roller 31 may be gradually enhanced along the rotation direction of the second outer cylinder 32, or the magnetism of the end of the second magnetic roller 31 may be stronger than the magnetism of the front end of the second magnetic roller 31 along the rotation direction of the second outer cylinder 32. Through the above arrangement, there is no need to set up structures such as scrapers to scrape off the magnetic impurities on the surface of the second outer cylinder 32 at all times. When the magnetic impurities on the surface of the second outer cylinder 32 accumulate to a certain amount, the magnetic force cannot resist the power of the adsorbed magnetic impurities being driven by the second outer cylinder 32, so that a large piece of magnetic impurity adsorbed material falls off.

[0028] In the magnetic separation device provided by the embodiment of the present invention, the magnetism of the portion of the first magnetic attraction area 23 in contact with the working fluid is stronger than the magnetism of the remaining portion of the first magnetic attraction area 23 .

[0029] In this embodiment, the first magnetic attraction area 23 of the first outer tube 22 is located below the working fluid level and is impacted by the working fluid, especially the part close to the liquid inlet end of the liquid inlet tank 1, so the magnetic configuration here is stronger to avoid the inability to absorb magnetic impurities due to the impact of the working fluid; when a permanent magnet is used, the magnet of this part can be a magnet with a brand of N42 or a neodymium iron boron magnet with stronger magnetism; when an electromagnet is used, it can be used in conjunction with a liquid level sensor to adjust the magnetic strength of the electromagnet.

[0030] The magnetic separation device provided by the embodiment of the present invention is as follows: Figure 1 As shown, with any point on the axis of the first-stage roller 2 as the origin, the horizontal direction as the x-axis, the vertical direction as the y-axis as a plane rectangular coordinate system, the working fluid flow direction as the positive direction of the x-axis, and the vertical upward direction as the positive direction of the y-axis; the axis of the secondary roller 3 is located in the first quadrant of the plane rectangular coordinate system.

[0031] In this embodiment, for the convenience of description, a plane rectangular coordinate system is established with any point on the axis of the first-stage roller 2 as the origin, the horizontal direction as the x-axis, and the vertical direction as the y-axis, and the positive direction of the x-axis is the flow direction of the working fluid, that is, the direction from the liquid inlet end to the liquid outlet end of the liquid inlet tank 1, as shown in this embodiment. Figure 1 The right direction in is the positive direction of the x-axis, and the positive direction of the y-axis is the vertically upward direction; when in use, in order to allow the filtrate from which the magnetic impurities are separated to continue to flow downward with the first outer cylinder 22 after the first outer cylinder 22 and the second outer cylinder 32 are squeezed, to avoid the filtrate from flowing back and to improve the squeezing effect, the axis of the secondary roller 3 is located in the first quadrant of the plane rectangular coordinate system. In this way, when the first outer cylinder 22 and the second outer cylinder 32 squeeze the magnetic impurities, the squeezed filtrate will not move in the opposite direction to the first outer cylinder 22, but will continue to move with the first outer cylinder 22, and finally enter the liquid inlet tank 1 and be discharged, thereby improving the squeezing effect of the magnetic impurities. Preferably, in order to improve the adsorption effect, the first magnetic attraction area 23 should at least extend to the fourth quadrant to prevent the magnetic impurities from falling off the primary roller 2.

[0032] The magnetic separation device provided by the embodiment of the present invention is as follows: Figure 1 As shown, a water baffle 4 is provided at the liquid inlet end of the liquid inlet tank 1; the end of the water baffle 4 away from the liquid inlet tank 1 can be rotatably arranged so that the water baffle 4 can swing with the impact of the working fluid.

[0033] In this embodiment, a water baffle 4 is provided at the liquid inlet end of the liquid inlet tank 1, and the water baffle 4 can be swingably arranged. When the working liquid enters the liquid inlet tank 1 through the liquid inlet end of the liquid inlet tank 1, the water baffle 4 can play a role in equalizing the liquid, so as to homogenize the working liquid flowing into the surface of the first outer cylinder 22. Moreover, the liquid baffle is preferably in a U-shaped structure, so as to prevent the working liquid from directly flowing out of the liquid inlet tank 1 without passing through the primary roller 2. When in use, when the amount of working liquid inflow is small, the lower end of the water baffle 4 moves downward, the opening is reduced, the flow resistance is large, and the working liquid is evenly distributed to the entire surface of the first outer cylinder 22; when the amount of working liquid inflow is large, the liquid level at the liquid inlet end becomes higher, the impact force on the water baffle 4 becomes larger, the water baffle 4 moves, the opening cross-section becomes larger, and the amount of working liquid passing through becomes larger; the ultimate goal is that no matter how much the flow rate is, the working liquid passing through the surface of the first outer cylinder 22 is relatively uniform.

[0034] The magnetic separation device provided in the embodiment of the present invention also includes an adjustment component; the adjustment component is used to adjust the gap between the first outer cylinder 22 and the second outer cylinder 32, thereby improving the squeezing effect. At the same time, the spacing between the first outer cylinder 22 and the second outer cylinder 32 can be adjusted according to the adsorption amount of magnetic impurities to avoid damage to the first outer cylinder 22 of the first roller 2 and the second outer cylinder 32 of the second roller 3. It should be noted that the first outer cylinder 22 of the first roller 2 and the second outer cylinder 32 of the second roller 3 are initially offset, but there will be a certain amount of magnetic impurities between the two during use, so that a certain gap is separated by the magnetic impurities, and this gap is filled with magnetic impurities. Furthermore, when the gap between the first outer cylinder 22 of the first roller 2 and the second outer cylinder 32 of the second roller 3 becomes larger, the control system can determine that the magnetic impurities adsorbed on the surfaces of the first outer cylinder 22 of the first roller 2 and the second outer cylinder 32 of the second roller 3 have increased. At this time, it is necessary to increase the rotation speeds of the first outer cylinder 22 and the second outer cylinder 32 to improve the adsorption effect of the working fluid. Therefore, the gap between the first outer cylinder 22 of the first roller 2 and the second outer cylinder 32 of the second roller 3 is positively correlated with the rotation speed of the first outer cylinder 22 of the first roller 2; or, the magnetism of the first magnetic roller 21 of the first roller 2 can be adjusted by detecting the gap between the first outer cylinder 22 of the first roller 2 and the second outer cylinder 32 of the second roller 3 to ensure the adsorption effect on the magnetic impurities in the working fluid.

[0035] Optionally, in this embodiment, the adjustment assembly includes an elastic member; both ends of the elastic member are rotatably connected to the rotating shafts of the first outer cylinder 22 and the second outer cylinder 32. The elastic member can be a spring or the like; or, the above-mentioned adjustment assembly can also be a telescopic cylinder such as an air cylinder or an oil cylinder.

[0036] Another embodiment of the present invention further provides a production system, comprising the magnetic separation device described in any of the above embodiments.

[0037] Optionally, in this embodiment, the above-mentioned production system can be a sheet material processing system, which removes oxide scale on the surface of the metal sheet by wet shot blasting, and the above-mentioned magnetic separation device is used to separate the oxide scale in the working fluid; or, in this embodiment, the above-mentioned production system can also be a steel manufacturing system. For example, when hot-rolling steel, the oxide scale on the surface of the steel is flushed with working fluid, and the above-mentioned magnetic separation device is used to separate the oxide scale in the working fluid.

[0038] In the description of the present invention, it should be noted that the terms "upper" and "lower" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "primary" and "secondary" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0039] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the inside of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, in the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0040] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A magnetic separation device, characterized in that: include: A liquid inlet tank (1) for receiving a working liquid containing magnetic impurities, and a primary roller (2) and a secondary roller (3) arranged in sequence; The first-stage roller (2) comprises a first magnetic roller (21) and a first outer cylinder (22); the first magnetic roller (21) is fixedly arranged in the first outer cylinder (22); the first outer cylinder (22) can rotate relative to the first magnetic roller (21); the first magnetic roller (21) forms a first magnetic attraction area (23) and a first non-magnetic area (24) on the surface of the first outer cylinder (22); the first magnetic attraction area (23) is used to absorb magnetic impurities; The secondary roller (3) comprises a second magnetic roller (31) and a second outer cylinder (32); the second magnetic roller (31) is fixedly arranged in the second outer cylinder (32); the second outer cylinder (32) can rotate relative to the second magnetic roller (31); the second magnetic roller (31) forms a second magnetic attraction area (33) and a second non-magnetic area (34) on the surface of the second outer cylinder (32); a line connecting any point on the axis of the secondary roller (3) and any point on the axis of the primary roller (2) passes through the second magnetic attraction area (33) and the first non-magnetic area (24).

2. The magnetic separation device according to claim 1, characterized in that: The bottom of the liquid inlet tank (1) is provided with a recessed structure matching the first outer cylinder (22), and a portion of the first outer cylinder (22) is located within the recessed structure.

3. The magnetic separation device according to claim 1, characterized in that: The first outer cylinder (22) and the second outer cylinder (32) rotate in opposite directions.

4. The magnetic separation device according to claim 1, characterized in that: Along the rotation direction of the second outer cylinder (32), the magnetism of the second magnetic roller (31) is enhanced.

5. The magnetic separation device according to claim 1, characterized in that: The magnetism of the portion of the first magnetic attraction area (23) in contact with the working fluid is stronger than the magnetism of the remaining portion of the first magnetic attraction area (23).

6. The magnetic separation device according to any one of claims 1 to 5, characterized in that: With any point on the axis of the primary roller (2) as the origin, the horizontal direction as the x-axis, the vertical direction as the y-axis as a plane rectangular coordinate system, the working fluid flow direction as the positive direction of the x-axis, and the vertical upward direction as the positive direction of the y-axis; the axis of the secondary roller (3) is located in the first quadrant of the plane rectangular coordinate system.

7. The magnetic separation device according to any one of claims 1 to 5, characterized in that: A water baffle (4) is provided at the liquid inlet end of the liquid inlet groove (1); one end of the water baffle (4) away from the liquid inlet groove (1) is rotatably arranged so that the water baffle (4) can swing with the impact of the working fluid.

8. The magnetic separation device according to any one of claims 1 to 5, characterized in that: It also includes an adjustment component; the adjustment component is used to adjust the gap between the first outer cylinder (22) and the second outer cylinder (32).

9. The magnetic separation device according to claim 8, characterized in that: The adjustment component comprises an elastic member; two ends of the elastic member are rotatably connected to the rotating shafts of the first outer cylinder (22) and the second outer cylinder (32) respectively.

10. A production system, characterized in that: Comprising the magnetic separation device as described in any one of claims 1 to 9.

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