A solid hazardous waste treatment apparatus

Abstract

This invention relates to the field of lithium battery recycling technology, specifically to a solid hazardous waste treatment device. The device includes a frame and a screening mechanism. A material conveying mechanism and a guide plate are mounted on the frame, with the guide plate positioned above the conveying mechanism. The screening mechanism includes a rotating disk and a notched annular magnet. The rotating disk is rotatably mounted on the frame, with its end face abutting the guide plate. The annular magnet is disposed inside the rotating disk and can rotate relative to it. When solid hazardous waste passes through the rotating disk, magnetic substances are adsorbed onto it. When the rotating disk rotates to the notch of the annular magnet, the magnetic substances fall onto the guide plate and move to the recycling area. By placing the notched annular magnet inside the rotating disk, the disk can continuously adsorb magnetic substances, reducing the possibility of magnetic substances remaining in the solid hazardous waste and improving the recycling efficiency of magnetic substances.

Description

Technical Field

[0001] This invention relates to the field of lithium battery recycling technology, and in particular to a solid hazardous waste treatment device. Background Technology

[0002] Since its commercialization, lithium batteries have been widely used in civilian and military fields due to their unique advantages such as high specific energy, small size, light weight, wide operating temperature range, long cycle life, and good safety performance. These applications include cameras, mobile phones, laptops, and portable thermometers. Lithium batteries are also one of the preferred lightweight high-energy power batteries for electric vehicles.

[0003] Due to resource scarcity and the need for environmental governance, countries around the world attach great importance to the recycling and reuse of waste batteries. Recycling and reusing waste batteries can not only avoid resource waste and make the best use of resources, but also reduce the pollution of the environment caused by metal ions contained in waste batteries.

[0004] Chinese Patent No. CN206082718U discloses a high-efficiency sorting and recycling device for waste lithium batteries. The device conveys lithium battery fragments to the discharge guide plate via a conveyor belt. Metal materials continue to be conveyed under the action of magnets. When they reach the magnetic cleaning device, the magnets temporarily lose their magnetism under the action of an external magnetic field, and the metal materials fall off the magnets. The positive electrode material enters the fine crushing separator, where it is further crushed under the action of the crushing screw. The positive electrode material is screened out through the first screen, and the waste residue flows out from the waste residue discharge port under the action of the crushing screw.

[0005] In actual use, it was found that when magnetically separating metal materials from a large number of lithium batteries, on the one hand, some metal materials are trapped in the battery waste and cannot be fully separated, which reduces the efficiency of recycling; on the other hand, the amount of metal material that can be adsorbed at one time by the same magnet is limited, which means that some metal materials cannot be screened out, resulting in low recycling efficiency and easy waste of resources. Summary of the Invention

[0006] Therefore, it is necessary to provide a solid hazardous waste treatment device to address the problem of low recycling efficiency in the current magnetic separation of metal materials in lithium batteries.

[0007] The above objectives are achieved through the following technical solutions:

[0008] A solid hazardous waste treatment device for recovering magnetic substances contained in the solid hazardous waste, the solid hazardous waste treatment device comprising:

[0009] A frame is provided with a material conveying mechanism and a guide plate located above the material conveying mechanism. The material conveying mechanism is used to transport the solid hazardous waste along the length of the frame; the guide plate is used to guide the magnetic material to the recycling area.

[0010] A screening mechanism is provided above the material conveying mechanism. The screening mechanism includes a rotating disk and a ring magnet with a notch. The rotating disk is rotatably mounted on the frame, and its end face abuts against the guide plate. The ring magnet is located inside the rotating disk and can rotate relative to it. The notch of the ring magnet faces the guide plate, so that when the magnetic material attracted by the rotating disk rotates to the notch of the ring magnet, it loses its attraction and falls onto the guide plate.

[0011] Furthermore, there are multiple guide plates, rotating disks, and annular magnets, with the rotating disks and guide plates alternately arranged along the width direction of the frame.

[0012] Furthermore, the frame is also provided with a connecting shaft, the axis of which is arranged along the width direction of the frame. Multiple guide plates are rotatably sleeved on the connecting shaft at one end, and the guide plates and the connecting shaft are connected by a first elastic element. The guide plates are extendable and retractable along the width direction of the frame. The screening mechanism also includes a first connecting pipe, a second connecting pipe, and an adjusting assembly. Adjacent rotating disks are connected through the first connecting pipe and the second connecting pipe, which are capable of sliding relative to each other along the width direction of the frame. The adjusting assembly is disposed between adjacent rotating disks and is used to change the distance between adjacent rotating disks.

[0013] Furthermore, a connecting rod is also provided on the frame, with the axis of the connecting rod arranged along the width direction of the frame; the adjusting assembly includes a first hydraulic ring, a second hydraulic ring, a limiting ring, and a second elastic element. The first hydraulic ring is fixedly sleeved on the first connecting pipe, and a trigger rod that can slide in the radial direction is provided on the circumferential wall surface of the first hydraulic ring. The second hydraulic ring is fixedly sleeved on the second connecting pipe. Hydraulic oil is filled between the first hydraulic ring and the second hydraulic ring, and the first hydraulic ring and the second hydraulic ring can slide relative to each other in a sealed manner; there are two limiting rings, one of which can slide along the axis of the rotating disk and is sleeved on the first connecting pipe, and one end of which can slide along the axis of the connecting rod and is arranged on the connecting rod; there are two second elastic elements, one end of which is arranged on the limiting ring, and the other end is arranged on the first connecting pipe or the second connecting pipe.

[0014] Furthermore, the material conveying mechanism includes a conveyor belt.

[0015] Furthermore, a scraper plate is also provided on the frame, which is located above the material conveying mechanism. The scraper plate is used to prevent the solid hazardous waste from accumulating on the material conveying mechanism in the vertical direction.

[0016] Furthermore, the screening mechanism also includes a drive component for providing the driving force for rotating the rotating disk.

[0017] Furthermore, the solid hazardous waste treatment equipment also includes a crushing mechanism, which is mounted on the frame and is used to crush the solid hazardous waste.

[0018] Furthermore, there are multiple screening mechanisms arranged side by side along the length of the frame.

[0019] The beneficial effects of this invention are:

[0020] This invention provides a solid hazardous waste treatment device comprising a frame and a screening mechanism. A material conveying mechanism and a guide plate are mounted on the frame, with the guide plate positioned above the material conveying mechanism. The screening mechanism is positioned above the material conveying mechanism and includes a rotating disk and a notched annular magnet. The rotating disk is rotatably mounted on the frame, with its end face abutting against the guide plate. The annular magnet is disposed inside the rotating disk and can rotate relative to it. When solid hazardous waste passes through the rotating disk, magnetic substances in the solid hazardous waste are adsorbed onto the rotating disk. When the rotating disk rotates to the notch of the annular magnet, the magnetic substances fall onto the guide plate and move to the recycling area. By placing the notched annular magnet inside the rotating disk, the rotating disk can continuously adsorb magnetic substances, reducing the possibility of magnetic substances remaining in the solid hazardous waste and improving the recycling efficiency of magnetic substances.

[0021] Furthermore, by setting up multiple guide plates, rotating disks, and annular magnets, with the rotating disks and guide plates spaced apart and alternating along the width of the frame, not only is the screening area that the screening mechanism can screen increased, but the rotating disk can also screen out more magnetic materials, thereby improving the recycling efficiency.

[0022] Furthermore, by setting an adjustment component, when the amount of magnetic material on the guide plate increases, the adjacent rotating disks move away from each other under the action of the adjustment component. On the one hand, this makes it less likely for solid hazardous waste to accumulate at the rotating disk 230, and on the other hand, it allows the rotating disk 230 to adsorb more magnetic material, thus avoiding the occurrence of some metal materials being trapped in the solid hazardous waste and unable to be fully separated.

[0023] Furthermore, by setting up scraper plates, the height of solid hazardous waste accumulating vertically on the conveying mechanism is limited, preventing jamming and facilitating subsequent processing. Attached Figure Description

[0024] Figure 1 This is a three-dimensional structural diagram of a solid hazardous waste treatment device provided in an embodiment of the present invention;

[0025] Figure 2 This is a front view structural diagram of a solid hazardous waste treatment device with the inlet removed, according to an embodiment of the present invention.

[0026] Figure 3 for Figure 2 A partially enlarged schematic diagram of section A of the solid hazardous waste treatment equipment shown;

[0027] Figure 4 A three-dimensional structural schematic diagram of the screening mechanism of a solid hazardous waste treatment device provided in an embodiment of the present invention;

[0028] Figure 5 for Figure 4 A partially enlarged schematic diagram of section B of the screening mechanism in the solid hazardous waste treatment equipment shown.

[0029] Figure 6 This is an exploded structural diagram of a screening mechanism component of a solid hazardous waste treatment device according to an embodiment of the present invention.

[0030] in:

[0031] 100. Frame; 110. Feed inlet; 120. Scraper plate; 130. Conveyor belt; 140. Connecting shaft; 150. Guide plate; 160. Receiving plate; 170. Connecting rod;

[0032] 200. Screening mechanism; 210. Fixed rod; 220. Transmission ring; 230. Rotating disk; 240. Ring magnet; 250. First connecting pipe; 251. Second connecting pipe; 260. Snap ring; 270. Connecting ring; 280. First hydraulic ring; 2801. Trigger rod; 281. Second hydraulic ring; 290. Limiting ring. Implementation

[0033] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0034] The serial numbers assigned to components in this document, such as "first," "second," etc., are merely used to distinguish the described objects and have no sequential or technical meaning. The terms "connection" and "linkage" used in this application, unless otherwise specified, include both direct and indirect connections (linkages). In the description of this invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention.

[0035] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0036] This invention is used to screen out magnetic materials from solid hazardous waste, and is preferably used to separate magnetic metal materials such as iron, cobalt, and nickel from waste batteries.

[0037] like Figures 1 to 6 As shown, a solid hazardous waste treatment device provided in an embodiment of the present invention includes a frame 100 and a screening mechanism 200. The frame 100 has a width direction and a length direction, which are arranged perpendicularly. The frame 100 is provided with an inlet 110, a conveying mechanism, a guide plate 150 located above the conveying mechanism, and a receiving plate 160 located below the guide plate 150. The crushed solid hazardous waste is fed onto the conveying mechanism through the inlet 110. The conveying mechanism is used to transport the solid hazardous waste along the length direction of the frame 100. The guide plate 150... 50 is used to guide magnetic materials to the recycling area, which is set on the receiving plate 160; the screening mechanism 200 is located above the conveying mechanism, and the screening mechanism 200 includes a rotating disk 230 and a ring magnet 240 with a notch. The rotating disk 230 is rotatably set on the frame 100, and the end face of the rotating disk 230 abuts against the guide plate 150. The ring magnet 240 is set inside the rotating disk 230 and can rotate relative to the rotating disk 230. The notch of the ring magnet 240 is set directly opposite the guide plate 150.

[0038] When recycling magnetic materials, the material conveying mechanism transports solid hazardous waste along the length of the frame 100. The magnetic materials adsorbed by the rotating disk 230 lose their attraction and fall onto the guide plate 150 when the rotating disk 230 rotates to the notch of the annular magnet 240.

[0039] Understandably, to improve automation, a conveyor belt can be installed on the receiving plate 160 so that the conveyor belt can transport magnetic materials to a designated area for subsequent processing.

[0040] To facilitate the connection between the rotating disk 230 and the frame 100, fixed rods 210 are provided on both sides of the frame 100 in the width direction. The rotating disk 230 is rotatably connected to the fixed rods 210 through a transmission ring 220 at one end of the two fixed rods 210 that are close to each other. The axis of the transmission ring 220 coincides with the axis of the rotating disk 230. The transmission ring 220 is used to provide the driving force for the rotation of the rotating disk 230.

[0041] By placing a notched annular magnet 240 inside the rotating disk 230, the rotating disk 230 can continuously adsorb magnetic materials, reducing the possibility of magnetic materials remaining in solid hazardous waste and improving the recycling efficiency of magnetic materials.

[0042] In some embodiments, such as Figure 1 As shown, the material conveying mechanism can be configured to include a conveyor belt 130, which is mounted on the frame 100 and is used to transport solid hazardous waste along the length of the frame 100.

[0043] In some embodiments, to provide the driving force for the rotation of the transmission ring 220, the screening mechanism 200 may also be configured to include a driving component. In this embodiment, the driving component is a drive motor, which is fixedly connected to the frame 100 by bolts. A first gear is fixedly sleeved on the motor shaft of the drive motor, and a second gear that meshes with the first gear is sleeved on one end of the transmission ring 220 near the frame 100. The drive motor drives the transmission ring 220 to rotate through gear engagement, thereby driving the rotating disk 230 to rotate.

[0044] In some embodiments, the solid hazardous waste treatment equipment further includes a crushing mechanism, which is located at the feed inlet 110. The crushing mechanism is used to crush the solid hazardous waste to facilitate subsequent screening of magnetic materials.

[0045] In some embodiments, such as Figure 1 As shown, there are multiple guide plates 150, rotating disks 230, and annular magnets 240. The rotating disks 230 and guide plates 150 are spaced apart and alternately arranged along the width direction of the frame 100. By setting multiple guide plates 150, rotating disks 230, and annular magnets 240, not only is the screening area that the screening mechanism 200 can screen increased, but the rotating disks 230 can also screen out more magnetic materials, thereby improving the recycling efficiency.

[0046] It is understandable that adjacent rotating disks 230 can be fixedly connected by a transmission rod so that multiple rotating disks 230 can rotate synchronously.

[0047] Understandably, the end of the transmission ring 220 furthest from the frame 100 is fixedly connected to the outermost rotating disk 230.

[0048] In a further embodiment, such as Figure 1 , Figure 3 and Figure 5 As shown, a connecting shaft 140 is also provided on the frame 100. The axis of the connecting shaft 140 is arranged along the width direction of the frame 100. Multiple guide plates 150 are rotatably sleeved on the connecting shaft 140 at one end, and the guide plates 150 and the connecting shaft 140 are connected by a first elastic element. In this embodiment, the first elastic element is a torsion spring. One end of the torsion spring is fixedly connected to the guide plate 150, and the other end is fixedly connected to the connecting shaft 140. The torsion spring is used to provide the driving force for the guide plate 150 to reset. The guide plate 150 can extend and retract along the width direction of the frame 100 so that the guide plate 150 can always be in contact with the rotating disk 2. The end face of 30 abuts against the guide plate 150 to prevent the magnetic material from not falling onto the guide plate 150 when the rotating disk 230 rotates to the notch of the annular magnet 240, thus avoiding waste of resources. The screening mechanism 200 also includes a first connecting pipe 250, a second connecting pipe 251 and an adjustment component. Adjacent rotating disks 230 are connected by the first connecting pipe 250 and the second connecting pipe 251. The first connecting pipe 250 and the second connecting pipe 251 can slide relative to each other along the width direction of the frame 100. The adjustment component is set between adjacent rotating disks 230 and is used to change the distance between adjacent rotating disks 230.

[0049] Taking two rotating disks 230 as an example, for ease of description, the two rotating disks 230 are respectively named the left rotating disk 230 and the right rotating disk 230; one end of the first connecting pipe 250 is fixedly connected to the inner end face of the left rotating disk 230 and the axis of the first connecting pipe 250 coincides with the axis of the left rotating disk 230; one end of the second connecting pipe 251 is fixedly connected to the inner end face of the right rotating disk 230 and the axis of the second connecting pipe 251 coincides with the axis of the right rotating disk 230; the end of the first connecting pipe 250 away from the left rotating disk 230 is sleeved on the end of the second connecting pipe 251 away from the right rotating disk 230; the first connecting pipe 250 and the second connecting pipe 251 can slide relative to each other along the width direction of the frame 100.

[0050] In a further embodiment, such as Figure 3 , Figure 4 , Figure 5 and Figure 6As shown, a connecting rod 170 is also provided on the frame 100, and the axis of the connecting rod 170 is arranged along the width direction of the frame 100; the adjusting assembly includes a first hydraulic ring 280, a second hydraulic ring 281, a limiting ring 290, and a second elastic element. The first hydraulic ring 280 is fixedly sleeved on the first connecting pipe 250, and the second hydraulic ring 281 is fixedly sleeved on the second connecting pipe 251. Hydraulic oil is filled between the first hydraulic ring 280 and the second hydraulic ring 281, and the first hydraulic ring 280 and the second hydraulic ring 281 can slide relative to each other in a sealed manner. A trigger rod 2801 that can slide in the radial direction is provided on the circumferential wall surface of the first hydraulic ring 280. When the trigger rod 2801 moves in the radial direction of the first hydraulic ring 280 toward the center of the first hydraulic ring 280, the first hydraulic ring 280 is adjusted by the action of the hydraulic oil. The first connecting pipe 250 and the second connecting pipe 251 move away from each other, causing the adjacent rotating disks 230 to move away from each other as well. There are two limiting rings 290. One limiting ring 290 can be slidably sleeved on the first connecting pipe 250 along the axial direction of the rotating disk 230 and one end can be slidably disposed on the connecting rod 170 along the axial direction of the connecting rod 170. The other limiting ring 290 can be slidably sleeved on the second connecting pipe 251 along the axial direction of the rotating disk 230 and one end can be slidably disposed on the connecting rod 170 along the axial direction of the connecting rod 170. In this embodiment, the second elastic element is a compression spring. There are two compression springs. One end of the compression spring is disposed on the limiting ring 290 and the other end is disposed on the first connecting pipe 250 or the second connecting pipe 251.

[0051] For ease of connection, such as Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, the adjustment assembly further includes two retaining rings 260 and two connecting rings 270. Both the first connecting pipe 250 and the second connecting pipe 251 have annular grooves. One retaining ring 260 engages with the annular groove on the first connecting pipe 250, and one connecting ring 270 is sleeved on the first connecting pipe 250 and fixedly connected to the retaining ring 260. One limiting ring 290 is slidably sleeved on the connecting ring 270 along the axial direction of the rotating disk 230 and connected to the connecting ring 270 via a compression spring. The other retaining ring 260 engages with the annular groove on the second connecting pipe 251, and the other connecting ring 270 is sleeved on the second connecting pipe 251 and fixedly connected to the retaining ring 260. The other limiting ring 290 is slidably sleeved on the connecting ring 270 along the axial direction of the rotating disk 230 and connected to the connecting ring 270 via a compression spring.

[0052] When the amount of magnetic material on the guide plate 150 between adjacent rotating disks 230 increases, the guide plate 150, under the gravity of the magnetic material, can overcome the spring force of the torsion spring and rotate, abutting against the trigger rod 2801. This causes the trigger rod 2801 to move radially toward the center of the first hydraulic ring 280. Under the action of hydraulic oil, the first hydraulic ring 280 and the second hydraulic ring 281 move away from each other, causing the first connecting pipe 250 and the second connecting pipe 251 to move away from each other synchronously, and causing adjacent rotating disks 230 to move away from each other. Furthermore, the more magnetic material on the guide plate 150, the greater the rotation angle of the guide plate 150, and the greater the distance the trigger rod 2801 moves radially toward the center of the first hydraulic ring 280, thus causing adjacent rotating disks 230 to move more away from each other. In other words, the mass of the magnetic material on the guide plate 150 is positively correlated with the distance the adjacent rotating disks 230 move away from each other. When the amount of magnetic material on the guide plate 150 between adjacent rotating disks 230 increases, it indicates that a large amount of magnetic material has been adsorbed on the rotating disk 230, which affects the passage of solid hazardous waste and easily causes solid hazardous waste to accumulate at the rotating disk 230. Furthermore, the mutual pushing and friction between the solid hazardous waste and the magnetic material on the rotating disk 230 is not conducive to the adhesion of the magnetic material on the rotating disk 230, thus affecting the separation effect. By setting adjacent rotating disks 230 far apart from each other, on the one hand, it is not easy for solid hazardous waste to accumulate at the rotating disk 230, and on the other hand, the rotating disk 230 can adsorb more magnetic material, avoiding the occurrence of some metal materials being trapped in the solid hazardous waste and unable to be fully separated.

[0053] When the mass of the magnetic material on the guide plate 150 decreases, the first hydraulic ring 280 and the second hydraulic ring 281 automatically reset under the action of the compression spring, driving the first connecting pipe 250 and the second connecting pipe 251 to reset synchronously, and driving the adjacent rotating disk 230 to reset synchronously.

[0054] In some embodiments, such as Figure 1 As shown, a scraper plate 120 is provided on the frame 100. In the vertical direction, the scraper plate 120 is located above the material conveying mechanism. In the horizontal direction, the scraper plate 120 is located between the feed inlet 110 and the screening mechanism 200. When the material conveying mechanism transports solid hazardous waste along the length of the frame 100, the height of the solid hazardous waste accumulated on the material conveying mechanism in the vertical direction is limited due to the restriction of the scraper plate 120, which avoids jamming and facilitates subsequent processing.

[0055] In some embodiments, such as Figure 1As shown, there are multiple screening mechanisms 200 arranged side by side along the length of the frame 100. When the material conveying mechanism transports solid hazardous waste along the length of the frame 100, the magnetic substances in the solid hazardous waste can be completely screened out by the multiple screening mechanisms 200, thereby improving recycling efficiency and reducing resource waste.

[0056] Based on the above embodiments, the usage principle and working process of the embodiments of the present invention are as follows:

[0057] The crushed solid hazardous waste is continuously fed onto the conveyor belt 130 through the feed inlet 110 and transported along the length of the frame 100 with the conveyor belt 130; and under the restriction of the scraper plate 120, the height of the solid hazardous waste piled up on the conveyor belt 130 in the vertical direction is limited.

[0058] Start the drive motor, which drives the outermost rotating disk 230 to rotate through the transmission ring 220. The outermost rotating disk 230 drives all the rotating disks 230 to rotate synchronously through the first connecting pipe 250 and the second connecting pipe 251. When solid hazardous waste passes through the rotating disk 230, the magnetic substances in the solid hazardous waste are attracted to the rotating disk 230. When the rotating disk 230 rotates to the notch of the annular magnet 240, the magnetic substances fall onto the guide plate 150 and move to the receiving plate 160 under the action of gravity.

[0059] When the amount of magnetic material on the guide plate 150 between adjacent rotating disks 230 increases, the guide plate 150 can overcome the elastic force of the torsion spring and rotate under the gravity of the magnetic material, and abut against the trigger rod 2801. This causes the trigger rod 2801 to move along the radial direction of the first hydraulic ring 280 towards the center of the first hydraulic ring 280. Under the action of hydraulic oil, the first hydraulic ring 280 and the second hydraulic ring 281 move away from each other, causing the first connecting pipe 250 and the second connecting pipe 251 to move away from each other synchronously. This also causes the adjacent rotating disks 230 to move away from each other, ensuring that the effective passage distance between the rotating disks 230 is basically the same, thus avoiding blockage of the device.

[0060] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0061] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. A solid hazardous waste treatment apparatus for lithium battery recycling, characterized by, A solid hazardous waste treatment device for recycling magnetic substances contained in solid hazardous waste comprises: a rack, a material conveying mechanism arranged on the rack and a guide plate arranged above the material conveying mechanism, the material conveying mechanism being used to convey the solid hazardous waste along the length direction of the rack, and the guide plate being used to guide the magnetic substances to a recycling area; a screening mechanism arranged above the material conveying mechanism, the screening mechanism comprising a rotating disc and an annular magnet with a gap, the rotating disc being rotatably arranged on the rack, the end surface of the rotating disc abutting against the guide plate, and the annular magnet being arranged inside the rotating disc and being capable of rotating relative to the rotating disc, the gap of the annular magnet being arranged opposite to the guide plate, so that the magnetic substances adsorbed by the rotating disc lose the adsorption force and fall on the guide plate when the rotating disc rotates to the gap of the annular magnet; the number of the guide plates, the rotating discs and the annular magnets is multiple, and the rotating discs and the guide plates are alternately arranged along the width direction of the rack; a connecting shaft is further arranged on the rack, the axis of the connecting shaft being arranged along the width direction of the rack, one end of each of the guide plates being rotatably sleeved on the connecting shaft, and the guide plates and the connecting shaft being connected by first elastic members, the first elastic members being torsional springs, one end of each of the torsional springs being fixedly connected to the guide plate, the other end being fixedly connected to the connecting shaft, and the torsional springs being used to provide the driving force for the resetting of the guide plates, the guide plates being capable of extending and retracting along the width direction of the rack; the screening mechanism further comprises first connecting pipes, second connecting pipes and an adjusting assembly, adjacent rotating discs being connected by the first connecting pipes and the second connecting pipes, the first connecting pipes and the second connecting pipes being capable of relatively sliding along the width direction of the rack, and the adjusting assembly being arranged between adjacent rotating discs and being used to change the distance between adjacent rotating discs; 2. The solid hazardous waste treatment apparatus according to claim 1, characterized by, a connecting rod is further arranged on the rack, the axis of the connecting rod being arranged along the width direction of the rack, and the adjusting assembly comprising first hydraulic rings, second hydraulic rings, limiting rings and second elastic members, each of the first hydraulic rings being fixedly sleeved on the first connecting pipe, each of the first hydraulic rings being provided with a trigger rod capable of sliding along the radial direction on the circumferential wall surface of the first hydraulic ring, each of the second hydraulic rings being fixedly sleeved on the second connecting pipe, the first hydraulic rings and the second hydraulic rings being filled with hydraulic oil and being capable of relatively sealingly sliding, the number of the limiting rings being two, one of the limiting rings being slidably sleeved on the first connecting pipe along the axis direction of the rotating disc and one end of the limiting ring being slidably arranged on the connecting rod along the axis of the connecting rod, the other of the limiting rings being slidably sleeved on the second connecting pipe along the axis direction of the rotating disc and one end of the limiting ring being slidably arranged on the connecting rod along the axis of the connecting rod, and the number of the second elastic members being two, one end of each of the second elastic members being arranged on the limiting ring and the other end being arranged on the first connecting pipe or the second connecting pipe.

3. The solid hazardous waste treatment apparatus according to claim 1, characterized by, The material conveying mechanism comprises a conveyor belt.

4. The solid hazardous waste treatment apparatus according to claim 1, characterized by, A scraping plate is further arranged on the rack, the scraping plate being arranged above the material conveying mechanism and being used to prevent the solid hazardous waste from being stacked on the material conveying mechanism along the vertical direction.

5. The solid hazardous waste treatment apparatus according to claim 1, wherein The screening mechanism further comprises a driving member, the driving member being used to provide the driving force for the rotation of the rotating disc. The solid hazardous waste treatment device further comprises a crushing mechanism arranged on the rack, the crushing mechanism being used to crush the solid hazardous waste.

6. The solid hazardous waste treatment apparatus according to claim 1, wherein The screening mechanism is provided with a plurality of screening mechanisms, and the plurality of screening mechanisms are arranged side by side along the length direction of the rack.

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