Harmless treatment device for trailer axle machining waste

Abstract

The invention relates to the technical field of wastewater filtering devices, in particular to a harmless treatment device for trailer axle machining waste. Comprising a machine barrel, a rotating frame and an air supply ring, a settling zone is arranged in the center of the bottom of the machine barrel, and a storage zone is formed between the settling zone and the wall body of the machine barrel; the rotating frame is connected with the machine barrel through a rotating shaft, a plurality of magnetic attraction areas are evenly arranged in the circumferential direction of the rotating frame, the magnetic attraction positions in the magnetic attraction areas can be adjusted through rotation, the distance between the bottom face of the rotating frame and the settling area is a certain height, and a sealing plate connected with the storage area is arranged below the multiple magnetic attraction areas. The bottom of the magnetic suction area is communicated with the storage area; through the design of the rotating magnetic attraction area, the separation effect on metal particles is improved, collection of the metal particles can be rapidly completed, classified recovery of metal, mud and waste water is achieved, the construction procedure is simplified, the overall structure is compact, the requirement for the occupied area is reduced, and actual transformation and popularization are facilitated.

Description

Technical Field

[0001] This invention relates to the field of wastewater filtration devices, and in particular to a device for the harmless treatment of waste materials from trailer axle processing. Background Technology

[0002] During the machining of trailer axles and other components, complex wastewater containing metal shavings, oil, sludge, and other impurities is generated. Currently, the treatment of such waste mainly relies on traditional sedimentation tanks, filters, or single-function separation equipment. However, existing technologies have the following problems: First, the equipment has a single function and can usually only treat one type of pollutant in water, mud, or metal particles. For complex processing wastewater, multiple devices need to be connected in series, resulting in a large system, a large footprint, and high treatment costs. Secondly, in terms of metal particle recovery, fixed magnetic adsorption devices are prone to forming adsorption dead zones, and cleaning is difficult after adsorption saturation, making it difficult to achieve continuous and efficient metal recovery. Furthermore, existing devices lack an effective mechanism for the coordinated and classified collection of water, mud, and metal particles, resulting in poor overall treatment effect, complex treatment process, and inability to meet the requirements of harmlessness and resource utilization. Therefore, there is an urgent need for an integrated treatment device that can simultaneously and efficiently separate and classify multiple pollutants. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a harmless treatment device for trailer axle processing waste, which improves the separation effect of metal particles through the design of a rotating magnetic attraction zone and can quickly complete the collection of metal particles, realize the classified recycling of metal, mud and wastewater, simplify the treatment process, and has a compact overall structure, reducing the required floor space and facilitating practical modification and promotion.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is a harmless treatment device for trailer axle processing waste, comprising: a barrel, a rotating frame, and an air supply ring; a sedimentation zone is provided at the center of the bottom of the barrel, and a storage area is formed between the sedimentation zone and the wall of the barrel; the rotating frame is connected to the barrel by a rotating shaft, and multiple magnetic attraction zones are evenly arranged along the circumference of the rotating frame, and the magnetic attraction position inside the magnetic attraction zone can be adjusted by rotation; the bottom surface of the rotating frame is arranged at a certain height above the sedimentation zone; a sealing plate connected to the storage area is provided below the multiple magnetic attraction zones, and the bottom of the magnetic attraction zone is connected to the storage area; the air supply ring is fixedly connected to the top of the barrel and communicates with the inside of the magnetic attraction zone.

[0005] Preferably, the barrel is provided with an inlet pipe at the top and an outlet pipe at the bottom.

[0006] Preferably, a guide platform is provided on the inner wall of the barrel, and the guide platform is located between the rotating frame and the sedimentation zone.

[0007] Preferably, the magnetic attraction area includes an outer sleeve, a hollow rotating ring, and a toothed ring; the outer sleeve is fixedly connected to the rotating frame, the outer sleeve has a notch at the outward-facing area, the inner side of the outer sleeve has an air inlet communicating with the air supply ring and a material outlet communicating with the storage area, the inner side of the outer sleeve has a magnetic attraction component, and the magnetic attraction component and the outer sleeve form a rotating channel for installing the hollow rotating ring, the top of the hollow rotating ring has a first gear; the toothed ring is connected to the rotating frame and the first gear respectively.

[0008] Preferably, the magnetic attractor has a C-shaped structure and the opening is positioned to point towards the inside of the outer sleeve.

[0009] Preferably, the hollow rotating ring has symmetrically provided recesses, and the outer diameter of the hollow rotating ring is equal to the inner diameter of the outer sleeve.

[0010] Preferably, each of the air inlets is provided with a support pipe, and an air passage connected to the air supply ring is provided at the top of the support pipe.

[0011] Preferably, the bottom of the outer sleeve is provided with an extension, and the extension has an interlayer space communicating with the discharge port.

[0012] Preferably, the rotating frame has an air supply pipe at its center, which extends downward and enters the internal space of the barrel. The bottom of the air supply pipe has a turntable, and multiple air holes are evenly distributed along the circumference of the turntable.

[0013] Preferably, a scraper is provided above the rotating frame, and the scraper is arranged at an angle and has an oil-absorbing layer on its upper surface.

[0014] Compared with the prior art, the present invention has the following advantages: 1. The rotating frame drives the magnetic adsorption area to rotate, which can magnetically adsorb and collect metal particles in wastewater. After a certain period of time, the collected metal particles can be recovered by changing the position of the magnetic adsorption area. The central position is used to store other heavier impurities and sludge, so as to achieve classified collection. 2. The device has a compact overall structure, which greatly saves floor space compared to traditional equipment. At the same time, the rotating frame drives the magnetic attraction area to rotate, maintaining the magnetic attraction of each area and avoiding the occurrence of dead corners. Furthermore, the storage area for collecting metal particles is cleverly integrated inside the barrel, allowing the metal particles to be discharged directly from the inside of the outer barrel, which is efficient and stable. 3. Through the design of the scraper, oily substances in wastewater can also be removed, thereby realizing the separate treatment of oil, water, mud and metal particles. It can cope with complex water quality conditions, has strong comprehensive capabilities, and simplifies the production process and reduces treatment costs to a certain extent. 4. The rotating frame and the inner wall of the barrel form a wastewater flow channel. Combined with the rotating magnetic attraction zone, it can fully adsorb metal particles in the wastewater, reduce the space through which the water flows, and improve the magnetic attraction effect. 5. The connection design between the air supply ring and the air passage can maintain the air supply to the support pipe during rotation without motion interference. Furthermore, the use of gas as the working medium also enables the sealing check of the hollow rotating ring and the outer sleeve. Attached Figure Description

[0015] Figure 1 A schematic diagram of the overall structure of a device for harmlessly treating waste from trailer axle processing; Figure 2 This is a schematic diagram of the internal structure layout of the barrel; Figure 3 This is a sectional view of the barrel. Figure 4 This is a schematic diagram of the gas supply ring structure; Figure 5 This is a schematic diagram of the top structure of the rotating frame; Figure 6 This is a schematic diagram of the sealing plate structure; Figure 7 This is a schematic diagram of the upper part of a gas pipeline; Figure 8 This is a schematic diagram of the bottom structure of a gas pipeline; Figure 9 This is a schematic diagram of the structure at the outer sleeve. Figure 10 This is a schematic diagram of the longitudinal section of the outer sleeve; Figure 11 This is a schematic diagram of the horizontal cross-section of the outer sleeve; Figure 12 This is a schematic diagram of a hollow rotating ring structure.

[0016] In the diagram: 1. Barrel; 2. Rotating frame; 3. Air supply ring; 4. Magnetic suction area; 5. Sealing plate; 6. Outer sleeve; 7. Hollow rotating ring; 8. Gear ring; 101. Sedimentation area; 102. Storage area; 103. Liquid inlet pipe; 104. Liquid outlet pipe; 105. Guide platform; 201. Gas delivery pipe; 202. Turntable; 203. Air hole; 204. Scraper; 205. Oil absorption layer; 601. Notch; 602. Air inlet; 603. Discharge outlet; 604. Magnetic suction component; 605. Support pipe; 606. Air passage; 607. Extension; 608. Interlayer space; 701. First gear; 702. Recess. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments and the accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of the invention. Furthermore, descriptions of well-known structures and techniques are omitted in the following description to avoid unnecessarily obscuring the concept of the invention.

[0018] Specific implementation method one: Combining Figure 1-12 As shown, a device for harmless treatment of trailer axle processing waste includes: a barrel 1, a rotating frame 2, and an air supply ring 3; a sedimentation zone 101 is provided at the center of the bottom of the barrel 1, and the lower part of the sedimentation zone 101 is conical to facilitate the accumulation of sludge and other impurities, and a storage area 102 is formed between the sedimentation zone 101 and the wall of the barrel 1; the rotating frame 2 is connected to the top of the barrel 1 by a rotating shaft and is equipped with a drive motor to drive the rotating frame 2 to rotate slowly as a whole, and multiple magnetic attraction zones 4 are evenly arranged along the circumference of the rotating frame 2, and the magnetic attraction position inside the magnetic attraction zone 4 can be adjusted by rotation, the bottom surface of the rotating frame 2 is arranged at a certain height from the sedimentation zone 101, and a sealing plate 5 connected to the storage area 102 is provided below the multiple magnetic attraction zones 4, and the bottom of the magnetic attraction zone 4 is connected to the storage area 102; the air supply ring 3 is fixedly connected to the top of the barrel 1 and communicates with the inside of the magnetic attraction zone 4.

[0019] Preferred embodiments, in combination Figure 1 and Figure 3 As shown, the upper part of the barrel 1 is provided with an inlet pipe 103 and the lower part with an outlet pipe 104. The two are arranged opposite each other, which can extend the passage time of wastewater. At the same time, the outlet pipe 104 is located at the lower position, which can prevent the water flow from directly impacting and carrying away impurities and metal particles, thus affecting the filtration effect.

[0020] Preferred embodiments, in combination Figure 2 and Figure 3 As shown, a guide platform 105 is provided on the inner wall of the barrel 1, and the guide platform 105 is located between the rotating frame 2 and the sedimentation zone 101. It guides the settled sludge and heavier impurities to gather towards the center of the barrel 1, and avoids accumulation above the storage zone 102, thereby reducing the number of downtime maintenance, extending the working time of the device, and thus increasing the sewage treatment capacity.

[0021] Preferred embodiments, in combination Figure 7-12As shown, the magnetic attraction area 4 includes an outer sleeve 6, a hollow rotating ring 7, and a toothed ring 8. The outer sleeve 6 is fixedly connected to the rotating frame 2 and embedded inside the rotating frame 2. The outer sleeve 6 has a notch 601 at the outer area. The inner side of the outer sleeve 6 has an air inlet 602 communicating with the air supply ring 3 and an outlet 603 communicating with the storage area 102. The inner side of the outer sleeve 6 has a magnetic attraction component 604, and the magnetic attraction component 604 and the outer sleeve 6 form a rotating channel for installing the hollow rotating ring 7. The top of the hollow rotating ring 7 has a first gear 701. The inner circle of the toothed ring 8 is machined with meshing teeth. The outer circumference of ring 8 is rotatably connected to the rotating frame 2. At the same time, a control motor is provided on the air supply ring 3. The control motor has a drive gear that meshes with the gear ring. By controlling the motor to drive the gear ring 8 to rotate, it can synchronously drive each hollow rotating ring 7 to rotate at a fixed angle, change the magnetic attraction position of the hollow rotating ring 7, and drive the metal particles on the surface into the inner position of the outer sleeve 6. With the help of airflow flushing, the metal particles are pushed into the storage area 102 to realize the collection operation. When it is necessary to adjust the position of the hollow rotating ring 7, the rotating frame 2 is temporarily stopped first to reduce the control difficulty.

[0022] Preferred embodiments, in combination Figure 9-11 As shown, the magnetic suction component 604 has a C-shaped structure and the opening is positioned towards the inside of the outer sleeve 6. After the hollow rotating ring 7 rotates to a certain angle, the metal particles adsorbed on the surface of the hollow rotating ring 7 are no longer affected by the magnetic force, and thus fall between the hollow rotating ring 7 and the inner wall of the outer sleeve 6, or adhere to the surface of the hollow rotating ring 7 under the action of the liquid. After being displaced to the positions of the air inlet 602 and the discharge port 603, the metal particles can be discharged.

[0023] Preferred embodiments, in combination Figure 8 and Figure 12 As shown, the hollow rotating ring 7 has symmetrically arranged recesses 702, and the outer diameter of the hollow rotating ring 7 is equal to the inner diameter of the outer sleeve 6. The recesses 702 are designed as inwardly concave arc surfaces, which can form a temporary holding space with the inner wall of the outer sleeve 6, facilitating the transfer of metal particles adsorbed on the surface to the inner side of the outer sleeve 6. They also form an air intake channel with the inner wall of the outer sleeve 6 at the air inlet, allowing the metal particles to be directly discharged from the discharge port 603 below. Moreover, the design of the recesses 702 can also play a role in transferring metal particles when the hollow rotating ring 7 rotates. However, when the magnetic force of the magnetic suction component 604 is large, the arc surface design of the hollow rotating ring 7 may cause some metal particles to slip off during rotation. To address this, the recesses 702 can be designed as inwardly concave rectangular structures. Due to the presence of its own structural sides, there is no situation where metal particles detach from the recesses during rotation.

[0024] To improve the sealing effect between the hollow rotating ring 7 and the outer sleeve 6, a rubber layer can be added to the inner wall of the outer sleeve 6 to enhance the sealing effect between them. At the same time, due to the presence of the recess 702, some wastewater may enter when it rotates into the outer sleeve 6, meaning that some wastewater will remain in the air intake channel. Therefore, air is used as the medium for discharging metal particles. On the one hand, it can push the metal particles to fall into the storage area 102, and on the other hand, it can clean and dry the recess 702. Furthermore, if a sealing defect occurs between the hollow rotating ring 7 and the outer sleeve 6 when the air medium is output, it can be observed in time through the air bubbles in the wastewater, which facilitates maintenance. A small amount of liquid seepage will not affect the stability of the structure's operation.

[0025] Preferred embodiments, in combination Figure 4 and Figure 5 As shown, each air inlet 602 is provided with a support pipe 605, and an air passage 606 connected to the air supply ring 3 is located at the top of the support pipe 605. The air passage 606 is rotatably connected to the air supply ring 3. At the same time, the air supply ring 3 is connected to an external air supply device to provide high-pressure gas to the air passage to clean and dry the recess 702. The upper part of the air supply ring 3 is fixedly connected to the barrel 1. During the slow rotation of the air passage with the rotating frame 2, it always remains connected to the air supply ring 3, and can carry out air supply at any time. The structure is reasonable and stable.

[0026] Preferred embodiments, in combination Figure 5 , Figure 6 , Figure 7 and Figure 10 As shown, the bottom of the outer sleeve 6 is provided with an extension 607, which is cylindrical in shape. The interior of the extension 607 is provided with a sandwich space 608 that communicates with the discharge port 603. The design of the extension 607 can replace the outer sleeve 6 to directly connect with the sealing plate 5, making it easier to achieve a sealed connection with the sealing plate 5. At the same time, the entire magnetic attraction area 4 can be located within the internal space of the machine cylinder 1, making the structural design more reasonable and simplifying the structural design of the bottom area of ​​the outer sleeve 6.

[0027] Preferred embodiments, in combination Figure 7-9 As shown, the rotating frame 2 has an air supply pipe 201 at its center. The air supply pipe 201 extends downward and enters the internal space of the barrel 1. The bottom of the air supply pipe 201 is provided with a turntable 202, and multiple air holes 203 are evenly provided along the circumference of the turntable 202. The air inlet position above the air supply pipe 201 is connected to an external air supply device. In the working state, microbubbles are generated at the position of the air holes 203, which help to carry the paint in the wastewater to float to the liquid surface, making it easier to clean.

[0028] Preferred embodiments, in combination Figure 8As shown, a scraper 204 is provided above the rotating frame 2, and the scraper 204 is arranged at an angle. An oil-absorbing layer 205 is provided on the upper surface. The oil-absorbing layer 205 is made of oleophilic and hydrophobic fibers, which can scrape and collect the paint floating on the surface during the rotation process. The oil-absorbing layer 205 can be replaced at a certain time.

[0029] Preferred embodiments, in combination Figure 2 and Figure 6 As shown, in order to facilitate the continuous discharge of metal particles in the storage area, a push plate is arranged below the sealing plate 5. As the push plate rotates with the rotating frame 2, it can continuously scrape the particles in the storage area 102 to the discharge pipe position, thereby achieving automatic cleaning.

[0030] Valves can be installed at the discharge pipe of storage area 102, the pipeline of sedimentation area, as well as the liquid inlet pipe 103 and liquid outlet pipe 104 to control the opening and closing of the pipelines for easy operation.

[0031] The hollow rotating ring 7 is preferably made of 316L stainless steel. The material is austenitic stainless steel, which is completely non-magnetic or has extremely low magnetic permeability in the solution-treated state. It will not interfere with the magnetic field distribution generated by the magnetic attractor 604, ensuring that the metal particles are reliably released only at the corresponding position of the recess 702. It can also be made of engineering plastics.

[0032] Working principle: The wastewater from the processing of trailer axles to be treated enters the barrel 1 through the inlet pipe 103. After filling to the specified height, the water supply is stopped. The wastewater first flows through the wastewater flow channel formed by the rotating frame 2 and the inner wall of the barrel 1. During this process, multiple magnetic attraction zones 4, which are evenly distributed along the circumference of the rotating frame 2, rotate continuously under the drive of the rotating frame 2. The magnetic attraction components 604 inside them dynamically and without dead angles adsorb and capture the ferromagnetic metal particles in the wastewater, effectively avoiding the adsorption blind zone problem of fixed magnetic attraction devices. The adsorbed metal particles gather in the recessed area and rotate with it. When it is necessary to recover the metal particles, the toothed ring 8 can be driven to rotate by the control system, which in turn drives the hollow rotating ring 7 to rotate at a specific angle. Since the magnetic suction component 604 has a C-shaped structure and the opening points to the inside of the outer sleeve 6, when the hollow rotating ring 7 rotates to the opening area of ​​the C-shaped magnetic suction component 604, the metal particles are freed from the strong magnetic field and fall into the gap between the hollow rotating ring 7 and the inner wall of the outer sleeve 6 under the combined action of gravity and subsequent airflow. At this time, the external air supply device introduces high-pressure gas into the air inlet 602 through the air supply ring 3, air passage 606 and support pipe 605. The airflow passes through the channel formed by the recess 702 on the hollow rotating ring 7, flushes the metal particles that have lost magnetic force and pushes them into the discharge port 603 connected to the storage area 102, and finally falls into the storage area 102 to complete the collection. At the same time, the heavier sludge and other non-magnetic impurities in the wastewater settle and accumulate in the sedimentation zone 101 at the bottom center of the barrel 1 under the action of gravity. The guide platform 105 set on the inner wall of the barrel 1 helps to guide the sediment to gather towards the center and prevent it from accumulating above the storage area 102, while oily substances (such as paint) in the wastewater float to the surface. To remove oil stains, an inclined scraper 204 is provided above the rotating frame 2. The oil-absorbing layer 205 on its upper surface continuously scrapes and absorbs the oil film on the liquid surface during the rotation of the rotating frame 2. In addition, the air supply pipe 201 in the center of the rotating frame 2 delivers gas to the turntable 202 at the bottom and releases microbubbles through the air hole 203 to help fine paint particles float to the surface, making it easier for the scraper 204 to clean. After the above-mentioned multi-stage coordinated treatment, the purified water is discharged from the outlet pipe 104 located below. The collected materials in the storage area 102 and the sedimentation area 101 can be discharged periodically through their respective pipelines, thereby achieving efficient and classified recycling of metals, mud, oil and water. At the same time, this device can also operate in a continuous water supply and drainage mode, which can be used for water quality treatment with lighter sludge, effectively improving wastewater treatment capacity and work efficiency.

[0033] Experimental example: A trailer axle manufacturer installed an integrated wastewater treatment device as described in this invention in its axle grinding and cleaning section to treat mixed process wastewater. The influent water quality was monitored for one week, and the average values ​​were: suspended solids (SS) 1180 mg / L, petroleum hydrocarbons (including paint and emulsified oil) 82 mg / L, ferromagnetic metal particles 410 mg / L, pH 8.3. The device operated continuously for 30 days with a microbubble air supply pressure of 0.3 MPa. No chemical agents were added during the operation, and only the oil-absorbing layer on the scraper was replaced periodically (every 8 hours). After operation, the effluent and recovered materials were tested and analyzed. The results are as follows: The average suspended solids (SS) in the effluent is 34 mg / L, and petroleum hydrocarbons are 6.1 mg / L. The removal rate of ferromagnetic metals reaches 99.2%. The metal particles collected in the storage area are dry and free of obvious sludge. After simple screening, the iron content exceeds 92%, and they have been recycled by the steel plant according to the scrap steel standard. The amount of sludge in the sedimentation area is small, mainly consisting of fine sand and non-magnetic impurities. The comprehensive operating cost per ton of water (including electricity, consumables, and labor) is 0.89 yuan. The equipment occupies 2.25 m² and can operate without any downtime.

[0034] In contrast, the traditional combined process previously used by the company (including coagulation sedimentation tank, multi-media filter and fixed magnetic separator) showed that, when treating the same wastewater quality, the effluent concentration was approximately 68 mg / L, petroleum was approximately 12.5 mg / L, the removal rate of ferromagnetic metals was only about 81%, and the recovered metals contained a large amount of chemical sludge, requiring additional dewatering treatment and making direct reuse difficult. At the same time, the process required continuous addition of polyaluminum chloride (PAC) and polyacrylamide (PAM), generating chemical sludge. The comprehensive operating cost per ton of water reached 1.85 yuan, and the entire system occupied an area of ​​approximately 6.5 m², resulting in a large workload for daily maintenance and an average of 1-2 blockages or chemical dosing failures per month.

[0035] As can be seen from the comparison, without the use of chemical agents, this invention not only produces better effluent quality and significantly improves the purity and efficiency of metal recovery, but also has obvious advantages in terms of operating costs, floor space and system reliability, fully demonstrating its practical value and advanced nature in the field of wastewater treatment.

[0036] It should be understood that the specific embodiments described above are merely illustrative or explanatory of the principles of the invention and do not constitute a limitation thereof. Therefore, any modifications, equivalent substitutions, improvements, etc., made without departing from the spirit and scope of the invention should be included within the protection scope of the invention. Furthermore, the appended claims are intended to cover all variations and modifications falling within the scope and boundaries of the appended claims, or equivalent forms of such scope and boundaries.

Claims

1. A device for the harmless treatment of waste from trailer axle processing, characterized in that, include: The machine barrel (1), rotating frame (2), and air supply ring (3) are provided. A sedimentation area (101) is provided at the center of the bottom of the machine barrel (1), and a storage area (102) is formed between the sedimentation area (101) and the wall of the machine barrel (1). The rotating frame (2) is connected to the machine barrel (1) by a rotating shaft. Multiple magnetic attraction areas (4) are evenly provided along the circumference of the rotating frame (2), and the magnetic attraction position inside the magnetic attraction area (4) can be adjusted by rotation. The bottom surface of the rotating frame (2) is arranged at a certain height from the sedimentation area (101). A sealing plate (5) connected to the storage area (102) is provided below the multiple magnetic attraction areas (4), and the bottom of the magnetic attraction area (4) is connected to the storage area (102). The air supply ring (3) is fixedly connected to the top of the machine barrel (1) and is connected to the inside of the magnetic attraction area (4).

2. The device for harmless treatment of trailer axle processing waste according to claim 1, characterized in that: The upper part of the barrel (1) is provided with an inlet pipe (103), and the lower part is provided with an outlet pipe (104).

3. The device for harmless treatment of trailer axle processing waste according to claim 1, characterized in that: The inner wall of the barrel (1) is provided with a guide platform (105), and the guide platform (105) is located between the rotating frame (2) and the sedimentation zone (101).

4. The device for harmless treatment of trailer axle processing waste according to claim 1, characterized in that: The magnetic suction area (4) includes an outer sleeve (6), a hollow rotating ring (7), and a toothed ring (8); the outer sleeve (6) is fixedly connected to the rotating frame (2), the outer sleeve (6) has a notch (601) pointing to the outer area, the inner side of the outer sleeve (6) is provided with an air inlet (602) communicating with the air supply ring (3) and a discharge port (603) communicating with the storage area (102), the inner side of the outer sleeve (6) is provided with a magnetic suction element (604), and a rotating channel for installing the hollow rotating ring (7) is formed between the magnetic suction element (604) and the outer sleeve (6), the top of the hollow rotating ring (7) is provided with a first gear (701); the toothed ring (8) is connected to the rotating frame (2) and the first gear (701) respectively.

5. The device for harmless treatment of trailer axle processing waste according to claim 4, characterized in that: The magnetic attractor (604) has a C-shaped structure and the opening is located inside the outer sleeve (6).

6. The device for harmless treatment of trailer axle processing waste according to claim 4, characterized in that: The hollow rotating ring (7) is symmetrically provided with recesses (702), and the outer diameter of the hollow rotating ring (7) is equal to the inner diameter of the outer sleeve (6).

7. The device for harmless treatment of trailer axle processing waste according to claim 4, characterized in that: Each of the air inlets (602) is provided with a support pipe (605), and an air passage (606) connected to the air supply ring (3) is provided at the top of the support pipe (605).

8. The device for harmless treatment of trailer axle processing waste according to claim 4, characterized in that: The outer sleeve (6) has an extension (607) at the bottom, and the extension (607) has an interlayer space (608) that communicates with the discharge port (603).

9. The device for harmless treatment of trailer axle processing waste according to claim 1, characterized in that: The rotating frame (2) has a gas supply pipe (201) at its center. The gas supply pipe (201) extends downward and enters the internal space of the barrel (1). The bottom of the gas supply pipe (201) is provided with a turntable (202), and multiple air holes (203) are evenly provided along the circumference of the turntable (202).

10. The device for harmless treatment of trailer axle processing waste according to claim 9, characterized in that: The rotating frame (2) is provided with a scraper (204) above it, and the scraper (204) is arranged at an angle and has an oil-absorbing layer (205) on its upper surface.

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