A magnetic separation device for wastewater pretreatment

Abstract

The utility model belongs to wastewater pretreatment technical field especially relates to a wastewater pretreatment's magnetic separation device, including casing, first motor, rotary column, magnetic roller and protection cylinder, still include: two rotatory plates, two rotatory plates are all rotationally installed in the casing, and the casing is inserted and is installed with two fixed frames below rotatory plate, two fixed frames all are fixedly installed with filter screen, and the casing is fixedly installed with first guide plate and second guide plate below two fixed frames, the scraper, the scraper is fixedly installed in the casing, and first motor is fixedly installed on the casing, and the output shaft of first motor penetrates the casing, and rotary column is fixedly installed on the output shaft of first motor, and magnetic roller is fixedly installed on rotary column, ensure that the magnetic separation effect of magnetic roller will not decline, will not cause the overall device to be blocked, simultaneously can take out the granular impurity of two filter screen top, and convenient operation does not need to use the tool, guarantees the filtration effect of two filter screens will not be worse.

Description

Technical Field

[0001] This utility model belongs to the field of wastewater pretreatment technology, and in particular relates to a magnetic separation device for wastewater pretreatment. Background Technology

[0002] The magnetic separation device for wastewater pretreatment can efficiently remove suspended solids, heavy metals, etc. It has the advantages of high treatment efficiency, fast speed, and small footprint, and is suitable for the pretreatment of various wastewaters.

[0003] Most wastewater pretreatment magnetic separation devices have some drawbacks in use, such as: directly carrying out magnetic separation without pretreatment and screening of wastewater, which can easily cause blockage of the device due to large particulate impurities in the wastewater, thereby reducing magnetic separation efficiency and treatment effectiveness. In view of this, we propose a magnetic separation device for wastewater pretreatment. Utility Model Content

[0004] The purpose of this invention is to provide a magnetic separation device for wastewater pretreatment to solve the problems mentioned in the background art.

[0005] In view of this, the present invention provides a magnetic separation device for wastewater pretreatment, comprising a shell, a first motor, a rotating column, a magnetic roller, and a protective cylinder, and further comprising: Two rotating plates are rotatably installed inside the housing. Two fixed frames are inserted and installed inside the housing and below the rotating plates. Filter screens are fixedly installed in both fixed frames. A first guide plate and a second guide plate are fixedly installed inside the housing and below the two fixed frames. The scraper is fixedly installed inside the housing. The first motor is fixedly installed on the housing. The output shaft of the first motor passes through the housing. The rotating column is fixedly installed on the output shaft of the first motor. The magnetic roller is fixedly installed on the rotating column. The protective cylinder is fixedly installed on the magnetic roller. The scraper is located on one side of the protective cylinder and is in contact with the protective cylinder. A drive assembly, located within the housing, is used to drive the two rotating plates to rotate. A fixing component, located within the housing, is used to fix the positions of the two fixing frames.

[0006] In this technical solution, when magnetic separation of wastewater is required, the wastewater is first poured into the housing. Through the set drive component, two rotating plates can be driven to rotate back and forth. Then the wastewater passes over the top of the two rotating plates. The back and forth rotation of the two rotating plates will guide the wastewater evenly to the top of the upper filter screen, ensuring that the wastewater can be filtered evenly by the two filter screens and will not accumulate at one point on the top of the two filter screens. This ensures that the filtration effect of the two filter screens will not decrease. Large particles of impurities in the wastewater will accumulate on the top of the upper filter screen, while medium particles of impurities in the wastewater will accumulate on the top of the lower filter screen, ensuring that the magnetic separation effect of the magnetic roller will not decrease and will not cause the overall device to be blocked. When it is necessary to remove particulate impurities from the two fixed frames, the staff can pull the two fixed frames out through the fixed components, and the particulate impurities on the top of the two filters can be removed. The operation is convenient and does not require the use of tools. Finally, the wastewater falls between the first and second guide plates and onto the top of the protective cylinder. At the same time, the first motor is started, which drives the rotating column to rotate. The rotating column drives the magnetic roller and the protective cylinder to rotate. The magnetic roller can attract metal objects in the wastewater to the surface of the protective cylinder. Then, the scraper will scrape the metal objects off. Finally, the metal objects enter the shell and are collected. The remaining wastewater is discharged through the shell.

[0007] In the above technical solution, the driving component further includes: The power chamber is located inside the housing. One end of each of the two rotating plates passes through the housing and extends into the power chamber. A first gear is fixedly installed on one end of each of the two rotating plates. The two first gears mesh. A second motor is fixedly installed inside the power chamber. The output shaft of the second motor is coaxially connected to one of the first gears.

[0008] In this technical solution, when magnetic separation of wastewater is required, the wastewater is first poured into the housing, and the second motor is started simultaneously. The second motor is powered on and drives one of the first gears to rotate reciprocally. One of the first gears drives the other first gear meshing with it to rotate reciprocally in the opposite direction. The two first gears drive the two rotating plates to rotate reciprocally. Subsequently, the wastewater passes over the top of the two rotating plates. The reciprocating rotation of the two rotating plates will evenly guide the wastewater to the top of the upper filter screen, ensuring that the wastewater can be evenly filtered by the two filter screens and will not accumulate at one point on the top of the two filter screens. This ensures that the filtration effect of the two filter screens will not decrease. Large particles of impurities in the wastewater will accumulate on the top of the upper filter screen, while medium particles of impurities in the wastewater will accumulate on the top of the lower filter screen, ensuring that the magnetic separation effect of the magnetic roller will not decrease and will not cause the overall device to become clogged.

[0009] In the above technical solution, the fixing component further includes: A limiting groove is formed inside the housing. Two limiting plates are slidably installed in the limiting groove. The two limiting plates extend into two fixed frames on their opposite sides, and the two limiting plates are respectively inserted into the two fixed frames. The third motor is fixedly installed in the limiting groove. The output shaft of the third motor is fixedly installed with a worm gear. Two worm wheels are meshed at the bottom of the worm gear. A second gear is fixedly installed at one end of each of the two worm wheels. Racks are meshed on both sides of each of the two second gears. The four racks are fixedly connected to the two limiting plates respectively.

[0010] In this technical solution, when it is necessary to remove particulate impurities from the two fixed frames, the third motor is first started. The third motor is powered on and drives the worm gear to rotate. The worm gear drives the two worm wheels meshing with it to rotate. The two worm wheels drive the two second gears to rotate. The two second gears drive the four racks meshing with them to slide. The four racks drive the two limiting plates to slide and move closer to each other. When the two limiting plates are removed from the two fixed frames, the two fixed frames can be pulled out, and the particulate impurities on the top of the two filter screens can be removed. The operation is convenient and does not require the use of tools.

[0011] In the above technical solution, the output shaft of the first motor is rotatably connected to the housing, the two first gears and the two rotating plates are rotatably connected to the power cavity, the output shaft, worm, two worm wheels and two second gears of the third motor are rotatably connected to the limiting groove, and the four racks are slidably connected to the limiting groove.

[0012] In this technical solution, it is ensured that the output shaft of the first motor can rotate within the housing, that the two first gears and the two rotating plates can rotate within the power cavity, that the output shaft of the third motor, the worm, the two worm wheels and the two second gears can rotate within the limiting groove, and that the four racks can slide within the limiting groove.

[0013] In the above technical solution, the filter aperture of the upper filter screen is larger than that of the lower filter screen.

[0014] In this technical solution, large particulate impurities in the wastewater will accumulate on top of the upper filter screen, while medium-sized particulate impurities in the wastewater will accumulate on top of the lower filter screen.

[0015] Furthermore, in the above technical solution, grooves are provided in both of the fixing frames.

[0016] In this technical solution, it is ensured that workers can pull the two fixed frames out using the two grooves.

[0017] In the above technical solution, a fixing rod is further fixedly installed inside the housing and above the two rotating plates.

[0018] In this technical solution, when wastewater enters the shell, it first enters the fixed rod, ensuring that the wastewater will not fall between the two rotating plates.

[0019] The beneficial effects of this utility model are: 1. In this magnetic separation device for wastewater pretreatment, when magnetic separation of wastewater is required, the wastewater is first poured into the housing. Through the set drive component, two rotating plates can be driven to rotate back and forth. Then the wastewater passes over the top of the two rotating plates. The back and forth rotation of the two rotating plates will evenly guide the wastewater to the top of the upper filter screen, ensuring that the wastewater can be evenly filtered by the two filter screens and will not accumulate at one point on the top of the two filter screens. This ensures that the filtration effect of the two filter screens will not decrease. Large particles of impurities in the wastewater will accumulate on the top of the upper filter screen, while medium particles of impurities in the wastewater will accumulate on the top of the lower filter screen, ensuring that the magnetic separation effect of the magnetic roller will not decrease and will not cause the overall device to be blocked.

[0020] 2. The magnetic separation device for wastewater pretreatment allows for the removal of particulate impurities from the two fixed frames when necessary. The fixed components allow operators to pull the frames to remove the particulate impurities from the top of the two filter screens. The operation is convenient and requires no tools, ensuring that the filtration efficiency of the two filter screens remains unchanged. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is one of the schematic diagrams of the shell structure of this utility model; Figure 3 This is the second schematic diagram of the cross-sectional structure of the shell of this utility model; Figure 4 This is the third schematic diagram of the shell cross-section structure of this utility model; Figure 5 This is the utility model Figure 4 Enlarged structural diagram at point A; Figure 6 This is the fourth schematic diagram of the shell cross-sectional structure of this utility model; Figure 7 This is the utility model Figure 6 Enlarged structural diagram at point B; Figure 8 This is a schematic diagram of the partial explosion structure of this utility model.

[0022] The markings in the diagram are as follows: 1. Housing; 2. Rotating plate; 3. Fixing frame; 4. Filter screen; 5. First guide plate; 6. Second guide plate; 7. Rotating column; 8. Magnetic roller; 9. Protective cylinder; 10. First motor; 11. Scraper; 12. Power chamber; 13. Second motor; 14. First gear; 15. Limiting groove; 16. Third motor; 17. Worm; 18. Worm wheel; 19. Second gear; 20. Rack; 21. Limiting plate; 22. Fixing rod; 23. Groove. Detailed Implementation

[0023] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0024] In the description of this application, it should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. For ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items, and therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0025] It should be noted that the terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and are not limited in number; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0026] It should be noted that in the description of this application, the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms 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, and therefore should not be construed as a limitation on the scope of protection of this application. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0027] It should be noted that, in this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples. Example

[0028] Please see Figure 1 - Figure 8 As shown, this embodiment provides a magnetic separation device for wastewater pretreatment, including a housing 1, a first motor 10, a rotating column 7, a magnetic roller 8, and a protective cylinder 9, and further including: Two rotating plates 2 are rotatably installed inside the housing 1. Two fixed frames 3 are inserted and installed inside the housing 1 and below the rotating plates 2. Filter screens 4 are fixedly installed inside the two fixed frames 3. A first guide plate 5 and a second guide plate 6 are fixedly installed inside the housing 1 and below the two fixed frames 3. Scraper 11 is fixedly installed inside housing 1. First motor 10 is fixedly installed on housing 1. The output shaft of first motor 10 passes through housing 1. Rotating column 7 is fixedly installed on the output shaft of first motor 10. Magnetic roller 8 is fixedly installed on rotating column 7. Protective cylinder 9 is fixedly installed on magnetic roller 8. Scraper 11 is located on one side of protective cylinder 9 and is in contact with protective cylinder 9. A drive assembly is located inside the housing 1 and is used to drive the two rotating plates 2 to rotate. The fixing component is located inside the housing 1 and is used to fix the positions of the two fixing frames 3.

[0029] When magnetic separation of wastewater is required, the wastewater is first poured into the housing 1. The drive component can drive the two rotating plates 2 to rotate back and forth. Then the wastewater passes over the top of the two rotating plates 2. The back and forth rotation of the two rotating plates 2 will guide the wastewater evenly to the top of the upper filter screen 4, ensuring that the wastewater can be filtered evenly by the two filter screens 4 and will not accumulate at one point on the top of the two filter screens 4. This ensures that the filtration effect of the two filter screens 4 will not decrease. Large particles of impurities in the wastewater will accumulate on the top of the upper filter screen 4, while medium particles of impurities in the wastewater will accumulate on the top of the lower filter screen 4, ensuring that the magnetic separation effect of the magnetic roller 8 will not decrease and will not cause the overall device to be blocked. When it is necessary to remove particulate impurities from the two fixed frames 3, the operator can pull the two fixed frames 3 out through the fixed components, and remove the particulate impurities from the top of the two filter screens 4. The operation is convenient and does not require the use of tools. Finally, the wastewater falls between the first guide plate 5 and the second guide plate 6 and onto the top of the protective cylinder 9. At the same time, the first motor 10 is started. The first motor 10 is powered on and drives the rotating column 7 to rotate. The rotating column 7 drives the magnetic roller 8 and the protective cylinder 9 to rotate. The magnetic roller 8 can adsorb the metal objects in the wastewater onto the surface of the protective cylinder 9. Then the scraper 11 will scrape the metal objects off. Finally, the metal objects enter the shell 1 for collection, and the remaining wastewater is discharged through the shell 1.

[0030] In this embodiment, the driving component includes: The power chamber 12 is located inside the housing 1. One end of each of the two rotating plates 2 passes through the housing 1 and extends into the power chamber 12. One end of each of the two rotating plates 2 is fixedly mounted with a first gear 14. The two first gears 14 mesh. A second motor 13 is fixedly mounted inside the power chamber 12. The output shaft of the second motor 13 is coaxially connected to one of the first gears 14. When magnetic separation of wastewater is required, the wastewater is first poured into the housing 1, and the second motor 13 is started simultaneously. The second motor 13 is powered on and drives one of the first gears 14 to rotate back and forth. One of the first gears 14 drives the other first gear 14 meshing with it to rotate back and forth in the opposite direction. The two first gears 14 drive the two rotating plates 2 to rotate back and forth respectively. Then the wastewater passes over the top of the two rotating plates 2. The back and forth rotation of the two rotating plates 2 will guide the wastewater evenly to the top of the upper filter screen 4, ensuring that the wastewater can be evenly filtered by the two filter screens 4 and will not accumulate at one point on the top of the two filter screens 4. This ensures that the filtration effect of the two filter screens 4 will not decrease. Large particles of impurities in the wastewater will accumulate on the top of the upper filter screen 4, while medium particles of impurities in the wastewater will accumulate on the top of the lower filter screen 4, ensuring that the magnetic separation effect of the magnetic roller 8 will not decrease and will not cause the overall device to be blocked.

[0031] In this embodiment, the fixing component includes: The limiting groove 15 is formed inside the housing 1. Two limiting plates 21 are slidably installed inside the limiting groove 15. The two limiting plates 21 extend to the two fixed frames 3 on the side that is far away from each other, and the two limiting plates 21 are respectively inserted into the two fixed frames 3. The third motor 16 is fixedly installed in the limiting groove 15. The output shaft of the third motor 16 is fixedly installed with a worm gear 17. Two worm wheels 18 are meshed at the bottom of the worm gear 17. A second gear 19 is fixedly installed at one end of each of the two worm wheels 18. A rack 20 is meshed on both sides of each of the two second gears 19. The four racks 20 are fixedly connected to the two limiting plates 21 respectively. When it is necessary to remove particulate impurities from the two fixed frames 3, the third motor 16 is first started. The third motor 16 is powered on and drives the worm gear 17 to rotate. The worm gear 17 drives the two worm wheels 18 that mesh with it to rotate. The two worm wheels 18 drive the two second gears 19 to rotate. The two second gears 19 drive the four racks 20 that mesh with them to slide. The four racks 20 drive the two limiting plates 21 to slide and move closer to each other. When the two limiting plates 21 are removed from the two fixed frames 3, the two fixed frames 3 can be pulled out, and the particulate impurities on the top of the two filter screens 4 can be removed. The operation is convenient and does not require the use of tools. Example

[0032] This embodiment provides a magnetic separation device for wastewater pretreatment, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0033] In this embodiment, the output shaft of the first motor 10 is rotatably connected to the housing 1, the two first gears 14 and the two rotating plates 2 are rotatably connected to the power cavity 12, the output shaft of the third motor 16, the worm 17, the two worm wheels 18 and the two second gears 19 are rotatably connected to the limiting groove 15, and the four racks 20 are slidably connected to the limiting groove 15.

[0034] Specifically, it is ensured that the output shaft of the first motor 10 can rotate within the housing 1, that the two first gears 14 and the two rotating plates 2 can rotate within the power chamber 12, that the output shaft of the third motor 16, the worm 17, the two worm wheels 18 and the two second gears 19 can rotate within the limiting groove 15, and that the four racks 20 can slide within the limiting groove 15. Example

[0035] This embodiment provides a magnetic separation device for wastewater pretreatment, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0036] In this embodiment, the pore size of the upper filter screen 4 is larger than that of the lower filter screen 4.

[0037] Large particles of impurities in the wastewater will accumulate on top of the upper filter screen 4, while medium-sized particles of impurities in the wastewater will accumulate on top of the lower filter screen 4. Example

[0038] This embodiment provides a magnetic separation device for wastewater pretreatment, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0039] In this embodiment, grooves 23 are provided in both fixed frames 3.

[0040] This ensures that staff can pull the two fixed frames 3 out through the two grooves 23. Example

[0041] This embodiment provides a magnetic separation device for wastewater pretreatment, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0042] In this embodiment, a fixing rod 22 is fixedly installed inside the housing 1 and above the two rotating plates 2.

[0043] When wastewater enters the housing 1, it first enters the fixed rod 22 to ensure that the wastewater does not fall between the two rotating plates 2.

[0044] Working principle: When magnetic separation of wastewater is required, the wastewater is first poured into the housing 1, and the second motor 13 is started at the same time. The second motor 13 is powered on and drives one of the first gears 14 to rotate back and forth. One of the first gears 14 drives the other first gear 14 meshing with it to rotate back and forth in the opposite direction. The two first gears 14 drive the two rotating plates 2 to rotate back and forth respectively. When the wastewater enters the housing 1, it first enters the fixed rod 22 to ensure that the wastewater will not fall between the two rotating plates 2. Then the wastewater passes over the top of the two rotating plates 2. The back and forth rotation of the two rotating plates 2 will guide the wastewater evenly to the top of the upper filter screen 4, ensuring that the wastewater can be evenly filtered by the two filter screens 4 and will not accumulate at one point on the top of the two filter screens 4. This ensures that the filtration effect of the two filter screens 4 will not decrease. Large particles of impurities in the wastewater will accumulate on the top of the upper filter screen 4, while medium particles of impurities in the wastewater will accumulate on the top of the lower filter screen 4, ensuring that the magnetic separation effect of the magnetic roller 8 will not decrease and will not cause the overall device to be blocked. When it is necessary to remove particulate impurities from the two fixed frames 3, the third motor 16 is first started. The third motor 16 is powered on and drives the worm 17 to rotate. The worm 17 drives the two worm wheels 18 meshing with it to rotate. The two worm wheels 18 drive the two second gears 19 to rotate respectively. The two second gears 19 drive the four racks 20 meshing with them to slide. The four racks 20 drive the two limiting plates 21 to slide and move closer to each other. When the two limiting plates 21 are removed from the two fixed frames 3, the two fixed frames 3 can be pulled out through the two grooves 23. The particulate impurities on the top of the two filter screens 4 can be removed. The operation is convenient and does not require the use of tools. Finally, the wastewater falls between the first guide plate 5 and the second guide plate 6 and onto the top of the protective cylinder 9. At the same time, the first motor 10 is started. The first motor 10 is powered on and drives the rotating column 7 to rotate. The rotating column 7 drives the magnetic roller 8 and the protective cylinder 9 to rotate. The magnetic roller 8 can adsorb the metal objects in the wastewater onto the surface of the protective cylinder 9. Then the scraper 11 will scrape the metal objects off. Finally, the metal objects enter the shell 1 for collection, and the remaining wastewater is discharged through the shell 1.

[0045] The embodiments of this application have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. This application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A magnetic separation device for wastewater pretreatment, comprising a housing (1), a first motor (10), a rotating column (7), a magnetic roller (8), and a protective cylinder (9), characterized in that, Also includes: Two rotating plates (2) are rotatably installed inside the housing (1). Two fixed frames (3) are inserted and installed inside the housing (1) and below the rotating plates (2). Filter screens (4) are fixedly installed inside the two fixed frames (3). A first guide plate (5) and a second guide plate (6) are fixedly installed inside the housing (1) and below the two fixed frames (3). Scraper (11), the scraper (11) is fixedly installed inside the housing (1), the first motor (10) is fixedly installed on the housing (1), the output shaft of the first motor (10) passes through the housing (1), the rotating column (7) is fixedly installed on the output shaft of the first motor (10), the magnetic roller (8) is fixedly installed on the rotating column (7), the protective cylinder (9) is fixedly installed on the magnetic roller (8), the scraper (11) is located on one side of the protective cylinder (9), and the scraper (11) is in contact with the protective cylinder (9); A drive assembly located inside the housing (1) and used to drive two rotating plates (2) to rotate; A fixing component is located inside the housing (1) and is used to fix the positions of the two fixing frames (3).

2. The magnetic separation device for wastewater pretreatment according to claim 1, characterized in that, The driving component includes: The power chamber (12) is located inside the housing (1). One end of each of the two rotating plates (2) passes through the housing (1) and extends into the power chamber (12). One end of each of the two rotating plates (2) is fixedly mounted with a first gear (14). The two first gears (14) mesh. A second motor (13) is fixedly mounted inside the power chamber (12). The output shaft of the second motor (13) is coaxially connected to one of the first gears (14).

3. The magnetic separation device for wastewater pretreatment according to claim 2, characterized in that, The fixing component includes: Limiting groove (15), the limiting groove (15) is opened in the housing (1), and two limiting plates (21) are slidably installed in the limiting groove (15). The two limiting plates (21) extend to the two fixed frames (3) respectively on the side that is far away from each other, and the two limiting plates (21) are respectively inserted into the two fixed frames (3). The third motor (16) is fixedly installed in the limiting groove (15). The output shaft of the third motor (16) is fixedly installed with a worm (17). Two worm wheels (18) are meshed at the bottom of the worm (17). A second gear (19) is fixedly installed at one end of each of the two worm wheels (18). A rack (20) is meshed on both sides of each of the two second gears (19). The four racks (20) are fixedly connected to the two limiting plates (21) respectively.

4. The magnetic separation device for wastewater pretreatment according to claim 3, characterized in that, The output shaft of the first motor (10) is rotatably connected to the housing (1), the two first gears (14) and the two rotating plates (2) are rotatably connected to the power chamber (12), the output shaft of the third motor (16), the worm (17), the two worm wheels (18) and the two second gears (19) are rotatably connected to the limiting groove (15), and the four racks (20) are slidably connected to the limiting groove (15).

5. The magnetic separation device for wastewater pretreatment according to claim 1, characterized in that, The filter pore size of the upper filter screen (4) is larger than that of the lower filter screen (4).

6. The magnetic separation device for wastewater pretreatment according to claim 1, characterized in that, Both of the fixed frames (3) have grooves (23) inside.

7. The magnetic separation device for wastewater pretreatment according to claim 1, characterized in that, A fixing rod (22) is fixedly installed inside the housing (1) and above the two rotating plates (2).

Images