A magnetic seed rapid scraping-off separation device and a magnetic seed recovery machine comprising the same
Patent Information
- Application Number
- CN202522629421.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-11
- Publication Date
- 2026-10-30
- Estimated Expiration
- 2035-12-11
AI Technical Summary
[0004]本实用新型的目的是提供一种磁种快速刮脱分离装置，旨在解决现有设计中刮板压力固定，无法根据吸附层厚度动态调整，针对厚吸附层刮脱不彻底、针对薄吸附层易刮伤旋转外筒的问题，实现刮板压力的自适应调节，兼顾刮脱效果
1）弹性压板组件以弹性压触方式贴合旋转外筒外表面，可自适应旋转外筒在运行过程中可能出现的微小表面磨损或径向跳动，始终保持与筒壁的紧密接触，从而彻底刮脱外筒表面吸附的黏性磁种吸附层，显著降低磁种残留量，提升整体运行效率；加之冲洗液喷射组件与弹性压板组件配套使用，在弹性压板组件刮脱磁种的同时，向磁种刮脱区域持续喷射冲洗液，如此，可即时分散刚刮脱的磁种团聚体，破坏磁种表面污染物包裹层的内部黏性连接，进而大幅提升回收磁种的纯度；
Smart Images
Figure CN224912562U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of environmental protection equipment manufacturing technology, and in particular to a magnetic seed rapid scraping and separation device and a magnetic seed recovery machine including the same. Background Technology
[0002] In the field of wastewater treatment, especially in the advanced treatment of industrial wastewater and municipal sewage, magnetic seed separation technology has become a core technology for overcoming the bottlenecks of traditional sedimentation and filtration processes due to its high efficiency in retaining suspended solids, heavy metal ions, and recalcitrant organic matter, as well as its advantages such as small footprint, high treatment load, and no secondary pollution from chemicals. The core application principle is as follows: Magnetic particles of a specific size (i.e., magnetic seeds) are added to the wastewater to be treated. Through surface modification of the magnetic seeds or the addition of flocculants, stable magnetic complexes are formed between the magnetic seeds and pollutants in the wastewater. Subsequently, the magnetic complexes are adsorbed onto the surface of a rotating carrier in the separation device using a magnetic field. After the carrier rotates to the desorption zone, the magnetic seeds are separated from the pollutants through a desorption mechanism. The magnetic seeds are recovered and reused, while the pollutants are discharged with the sludge, achieving the dual goals of wastewater purification and resource recycling. In magnetic seed separation systems for wastewater treatment, the efficient desorption and low-loss recovery of magnetic seeds directly determine the treatment cost and effluent stability. Currently, magnetic seed separation devices for wastewater treatment generally employ a structure combining a fixed magnetic field and a rotating outer cylinder. Permanent magnets are fixed inside the device, and when the rotating outer cylinder, which adsorbs magnetic compounds, rotates to a specific area, the magnetic seeds are stripped off by a desorption mechanism. However, the specific characteristics of wastewater treatment lead to the following problems with existing desorption mechanisms: 1) The magnetic seeds used in wastewater treatment are mostly fine-grained and easily combine with viscous pollutants in the wastewater to form a viscous adsorption layer. Existing devices often use rigid scraper designs for the scraping mechanism. However, during long-term treatment of silt-containing wastewater, the outer wall of the rotating outer cylinder is prone to surface wear or radial runout, preventing the rigid scraper from maintaining a tight fit with the cylinder wall. This results in the magnetic seeds in the viscous adsorption layer not being completely scraped off, leading to a high residual rate; 2) The desorption process of existing devices relies solely on the mechanical scraping action of the scraper. This method can only destroy the surface structure of the magnetic seed coating layer and cannot completely disperse the coating layer. Under the viscous traction of the organic flocculant layer, the magnetic seeds are very easy to stick together to form lumpy agglomerates, which leads to the generally insufficient purity of the recovered magnetic seeds; 3) The scraper pressure of the existing scraping mechanism is fixed and cannot be dynamically adjusted according to the thickness of the adsorption layer: For thick adsorption layers, the fixed pressure is insufficient, which easily leads to incomplete scraping; For thin adsorption layers, the excessive fixed pressure will directly scratch the anti-corrosion coating on the surface of the rotating outer cylinder, which will lead to the corrosion of the outer cylinder.
[0003] Therefore, it is imperative for those skilled in the art to solve the aforementioned problems. Utility Model Content
[0004] The purpose of this invention is to provide a magnetic seed rapid scraping and separation device, which aims to solve the problem that the scraper pressure is fixed in the existing design and cannot be dynamically adjusted according to the thickness of the adsorption layer. It addresses the problems of incomplete scraping of thick adsorption layers and easy scratching of the rotating outer cylinder of thin adsorption layers, and achieves adaptive adjustment of scraper pressure to balance the scraping effect.
[0005] This utility model relates to a magnetic seed rapid scraping and separation device, including a rotating outer cylinder, a magnetic block fixing inner cylinder, magnetic blocks, a motor drive unit, and a magnetic seed desorption unit. The rotating outer cylinder and the magnetic block fixing inner cylinder are coaxially arranged, and their outer circumferential surface is the material flow area. Multiple magnetic blocks are hidden inside the rotating outer cylinder and are fixedly installed on the outer wall of the magnetic block fixing inner cylinder, and are arranged at intervals along the circumference and axial direction of the magnetic block fixing inner cylinder. The motor drive unit is connected to the rotating outer cylinder for driving the rotating outer cylinder to rotate around its axis. During the magnetic seed separation process, the magnetic block fixing inner cylinder remains stationary. The magnetic seed desorption unit is arranged on one side of the rotating outer cylinder and includes an elastic pressure plate assembly and a rinsing liquid spray assembly. The elastic pressure plate assembly elastically presses against the outer surface of the rotating outer cylinder to scrape off the magnetic seeds adsorbed on the outer surface of the rotating outer cylinder. The rinsing liquid spray assembly is used in conjunction with the elastic pressure plate assembly to continuously spray rinsing liquid towards the magnetic seed scraping area.
[0006] As a further improvement to the technical solution disclosed in this utility model, the elastic pressure plate assembly includes a rotating shaft, a scraper, and an elastic reset unit; the rotating shaft is horizontally placed on one side of the rotating outer cylinder, and its axis is parallel to the central axis of the rotating outer cylinder; the scraper is loaded by the rotating shaft and performs circumferential oscillation motion synchronously with the rotating shaft, and its end away from the rotating shaft is the scraping contact end; the elastic reset unit is drivenly connected to one end of the rotating shaft to continuously apply a restoring torque toward the rotating outer cylinder.
[0007] As a further improvement to the technical solution disclosed in this utility model, the elastic reset unit includes a load-bearing component, a tension spring, and a force-transmitting component; the load-bearing component is fixed to an external support structure; the force-transmitting component is sleeved on the end of the rotating shaft and fixedly connected to the rotating shaft; the tension spring is connected between the load-bearing component and the force-transmitting component, and it is always maintained in a pre-stretched state.
[0008] As a further improvement to the technical solution disclosed in this utility model, the number of elastic reset units is 2, so as to apply restoring torque to both ends of the rotating shaft respectively.
[0009] As a further improvement to the technical solution disclosed in this utility model, the elastic pressure plate assembly also includes a connecting transition sheet metal part; the connecting transition sheet metal part is sleeved on the outer peripheral surface of the rotating shaft and fixedly connected to the rotating shaft; the side of the connecting transition sheet metal part facing the rotating outer cylinder is fixedly connected to the scraper.
[0010] As a further improvement to the technical solution disclosed in this utility model, the flushing liquid spraying assembly includes a support rod and spray heads; the support rod spans the magnetic seed scraping area, and its extension direction is parallel to the central axis of the rotating outer cylinder; multiple spray heads can be detachably installed on the support rod, and their spray nozzles are directly facing the magnetic seed scraping area.
[0011] As a further improvement to the technical solution disclosed in this utility model, the flushing fluid spray assembly also includes an elastic snap-fit component; the elastic snap-fit component is disposed between the support rod and the spray head, and it has a semi-encircling or full-encircling structure to encircle the outer circumferential surface of the support rod; a semi-encircling groove is provided on the side of the spray head facing the support rod; the spray head is semi-encircled by the semi-encircling groove on the outer circumferential surface of the support rod; the elastic snap-fit component has an elastic force that contracts towards the support rod in its natural state, and after assembly, it applies radial pressure to the support rod through the elastic force, causing the spray head to adhere to the outer circumferential surface of the support rod.
[0012] In addition, this utility model also discloses a magnetic seed recovery machine, including a frame, a box, an independent modular high-speed deflocculation device, and a magnetic seed rapid scraping and separation device; the box is supported by the frame; the high-speed deflocculation device is connected to the box through a conveying pipeline and is used for pre-flocculation and shearing of sludge flocs containing magnetic seeds; the box is provided with a deflocculation material transition chamber, a magnetic seed separation chamber, and a recycling magnetic seed discharge chamber in sequence along its own length direction; the deflocculation material transition chamber is connected to the outlet of the conveying pipeline; the magnetic seed rapid scraping and separation device acts on the magnetic seed separation chamber, and the magnetic seeds separated by it enter the recycling magnetic seed discharge chamber and are recycled and reused through the outlet of the recycling magnetic seed discharge chamber.
[0013] In practical applications, the magnetic seed rapid scraping and separation device disclosed in this utility model can achieve at least the following beneficial technical effects, specifically: 1) The elastic pressure plate assembly fits against the outer surface of the rotating outer cylinder in an elastic pressing manner. It can adapt to the slight surface wear or radial runout that may occur during the operation of the rotating outer cylinder, and always maintain close contact with the cylinder wall. This thoroughly scrapes off the viscous magnetic seed adsorption layer adsorbed on the outer cylinder surface, significantly reducing the amount of magnetic seed residue and improving the overall operating efficiency. In addition, the flushing liquid spraying assembly is used in conjunction with the elastic pressure plate assembly. While the elastic pressure plate assembly scrapes off the magnetic seed, it continuously sprays flushing liquid into the magnetic seed scraping area. This can immediately disperse the magnetic seed agglomerates that have just been scraped off and destroy the internal viscous connection of the contaminant coating layer on the magnetic seed surface, thereby greatly improving the purity of the recovered magnetic seed. 2) The elastic pressure contact structure has dynamic pressure adjustment capability, which can adaptively adjust the pressure contact force according to the thickness of the magnetic seed adsorption layer on the surface of the rotating outer cylinder. When the adsorption layer is thick, the elastic structure can deform appropriately to increase the scraping pressure and ensure that the adsorption layer is completely scraped off; when the adsorption layer is thin, the elastic recovery force maintains a moderate pressure to avoid scratching the anti-corrosion coating on the surface of the rotating outer cylinder. Attached Figure Description
[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0015] Figure 1 This is a three-dimensional schematic diagram of the magnetic seed recovery machine disclosed in this utility model from one perspective.
[0016] Figure 2 This is a three-dimensional schematic diagram of the magnetic seed recovery machine disclosed in this utility model from another perspective.
[0017] Figure 3 This is a three-dimensional schematic diagram of the magnetic seed recovery machine disclosed in this utility model (with part of the cover plate hidden).
[0018] Figure 4 yes Figure 1 Top view.
[0019] Figure 5 yes Figure 4 AA sectional view.
[0020] Figure 6 This is a three-dimensional schematic diagram of the magnetic seed rapid scraping and separation device in the magnetic seed recovery machine disclosed in this utility model.
[0021] Figure 7 yes Figure 6 The front view.
[0022] Figure 8 yes Figure 7 BB cross-sectional view.
[0023] Figure 9 This is a three-dimensional schematic diagram of the magnetic seed desorption section in the magnetic seed recovery machine disclosed in this utility model.
[0024] Figure 10 This is a schematic diagram of the assembly state of the spray head and the elastic snap-fit component in the magnetic seed recovery machine disclosed in this utility model.
[0025] 1-Frame; 2-Box; 21-Deflocculation material transition chamber; 22-Magnetic seed separation chamber; 23-Recycling magnetic seed discharge chamber; 3-High-speed deflocculation device; 4-Magnetic seed rapid scraping and separation device; 41-Rotating outer cylinder; 42-Magnetic block fixing inner cylinder; 43-Magnetic block; 44-Motor drive unit; 45-Magnetic seed desorption unit; 451-Elastic pressure plate assembly; 4511-Rotating shaft; 4512-Scraper; 45121-Scraper contact end; 4513-Elastic reset unit; 45131-Bearing component; 45132-Tension spring; 45133-Force transmission component; 4514-Connecting transition sheet metal part; 452-Rinsing liquid spray assembly; 4521-Bearing rod; 4522-Spray head; 45221-Semi-circular groove; 4523-Elastic snap-fit component; 5-Conveying pipeline. Detailed Implementation
[0026] The present invention will be further described in detail below with reference to specific embodiments. Figures 1-3 The diagrams shown below illustrate the structure of the magnetic seed recovery machine disclosed in this utility model from different perspectives. It can be seen that it mainly consists of a frame 1, a housing 2, a high-speed deflocculation device 3, a rapid magnetic seed scraping and separation device 4, and a conveying pipeline 5. The frame 1 serves as the supporting foundation for the entire device, providing stable installation support for each component. The housing 2, supported by the frame 1, is the core cavity for separating materials from the magnetic seeds. The high-speed deflocculation device 3 is an independent modular structure, connected to the housing 2 via the conveying pipeline 5, enabling pre-flocculation and shearing of magnetic seed-containing sludge flocs. The rapid magnetic seed scraping and separation device 4 operates within a designated area inside the housing 2, completing the efficient separation and recovery of the magnetic seeds.
[0027] like Figures 3-5 As shown, the housing 2 has, along its length, a deflocculation material transition chamber 21, a magnetic seed separation chamber 22, and a recycling magnetic seed discharge chamber 23. The deflocculation material transition chamber 21 connects to the outlet of the conveying pipeline 5, allowing material processed by the high-speed deflocculation device 3 to enter this chamber via the conveying pipeline 5, achieving buffering and transition. The magnetic seed separation chamber 22 is the main operating area of the rapid magnetic seed scraping and separation device 4, where the magnetic seeds are separated from impurities. The recycling magnetic seed discharge chamber 23 collects the separated magnetic seeds, which can be recycled back through the outlet of this chamber, achieving resource recycling.
[0028] like Figures 6-8As shown, the magnetic seed rapid scraping and separation device 4 is the core component for achieving efficient recovery of magnetic seeds. It mainly consists of a rotating outer cylinder 41, a magnetic block fixing inner cylinder 42, a magnetic block 43, a motor drive unit 44, and a magnetic seed desorption unit 45. The rotating outer cylinder 41 and the magnetic block fixing inner cylinder 42 are coaxially arranged, and their outer circumferential surface is the material flow area, where the material can complete the adsorption and separation of magnetic seeds. Multiple magnetic blocks 43 are hidden inside the rotating outer cylinder 41 and fixedly installed on the outer wall of the magnetic block fixing inner cylinder 42. They are arranged at intervals along the circumference and axial direction of the magnetic block fixing inner cylinder 42, which can form a stable magnetic field on the outer circumference of the rotating outer cylinder 41 to achieve the adsorption of magnetic seeds in the material. The motor drive unit 44 is connected to the rotating outer cylinder 41 and is used to drive the rotating outer cylinder 41 to rotate around its axis. During the magnetic seed separation process, the magnetic block fixing inner cylinder 42 remains stationary to ensure the stability of the magnetic field position and ensure the magnetic seed adsorption effect. The magnetic seed desorption unit 45 is arranged on one side of the rotating outer cylinder 41 and is used to efficiently scrape off and recover the magnetic seeds adsorbed on the surface of the rotating outer cylinder 41.
[0029] like Figure 9 As shown, the magnetic seed desorption unit 45 includes an elastic pressure plate assembly 451 and a rinsing liquid spray assembly 452, which work together to achieve deep desorption and purification of the magnetic seeds. The elastic pressure plate assembly 451 includes a rotating shaft 4511, a scraper 4512, an elastic reset unit 4513, and a connecting transition sheet metal part 4514. The rotating shaft 4511 is horizontally placed on one side of the rotating outer cylinder 41, and its axis is parallel to the central axis of the rotating outer cylinder 41; the connecting transition sheet metal part 4514 is sleeved on the outer peripheral surface of the rotating shaft 4511 and fixedly connected to the rotating shaft 4511, and its side facing the rotating outer cylinder 41 is fixedly connected to the scraper 4512. The scraper 4512 performs a circumferential oscillation motion synchronously with the rotating shaft 4511, and its end away from the rotating shaft 4511 is the scraping contact end 45121, which can directly contact the outer surface of the rotating outer cylinder 41. Two elastic reset units 4513 are connected to one end of the rotating shaft 4511, and can apply restoring torque to both ends of the rotating shaft 4511 respectively. The elastic reset unit 4513 includes a load-bearing member 45131, a tension spring 45132, and a force-transmitting member 45133. The load-bearing member 45131 is fixed to the external support structure, and the force-transmitting member 45133 is sleeved on the end of the rotating shaft 4511 and fixedly connected to it. The tension spring 45132 is connected between the load-bearing member 45131 and the force-transmitting member 45133, and is always maintained in a pre-stretched state to continuously apply a restoring torque towards the rotating outer cylinder 41 to the rotating shaft 4511.
[0030] Thanks to the elastic pressure plate assembly 451, the rotating outer cylinder 41 can adapt to minor surface wear or radial runout that may occur during operation, always maintaining close contact between the scraping end 45121 and the cylinder wall, thereby completely scraping off the viscous magnetic seed adsorption layer adsorbed on the outer cylinder surface, significantly reducing the amount of magnetic seed residue and improving overall operating efficiency. Moreover, the elastic pressure plate assembly 451 has dynamic pressure adjustment capability, which can adaptively adjust the pressure according to the thickness of the magnetic seed adsorption layer on the surface of the rotating outer cylinder 41. That is, when the adsorption layer is thicker, the tension spring 45132 is further stretched, increasing the scraping pressure to ensure that the adsorption layer is completely scraped off. When the adsorption layer is thinner, the elastic restoring force of the tension spring 45132 maintains a moderate pressure to avoid scratching the anti-corrosion coating on the surface of the rotating outer cylinder 41.
[0031] Similarly, Figure 9 As shown, the flushing fluid spray assembly 452 includes a support rod 4521, a spray head 4522, and a flexible snap-fit member 4523. The support rod 4521 spans the magnetic seed scraping area, and its extension direction is parallel to the central axis of the rotating outer cylinder 41; multiple spray heads 4522 are detachably mounted on the support rod 4521; the spray head 4522 has a semi-circular groove 45221 on the side facing the support rod 4521, which can semi-circle the outer circumference of the support rod 4521, and its spray nozzle is directly facing the magnetic seed scraping area; as shown... Figure 10 As shown, the elastic snap-fit component 4523 is disposed between the support rod 4521 and the spray head 4522, forming a semi-encircling structure that can encircle the outer circumferential surface of the support rod 4521. In its natural state, it has an elastic force that contracts towards the support rod 4521. After assembly, the elastic force applies radial pressure to the support rod 4521, causing the spray head 4522 to fit against the outer circumferential surface of the support rod 4521, ensuring the stability and positional adjustability of the spray head 4522 installation.
[0032] While the elastic pressure plate assembly 451 scrapes off the magnetic seeds, the flushing liquid spraying assembly 452 can continuously spray flushing liquid onto the magnetic seed scraping area to immediately disperse the newly scraped magnetic seed agglomerates, break the internal adhesive connections of the pollutant coating layer on the surface of the magnetic seeds, and significantly improve the purity of the recovered magnetic seeds. Together with the elastic pressure plate assembly 451, it achieves the dual effect of efficient desorption and high-purity recovery of magnetic seeds, ensuring the operation quality and resource recycling rate of the entire magnetic seed recovery machine.
[0033] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A magnetic seed rapid scraping and separation device, characterized in that, The device includes a rotating outer cylinder, a magnetic block fixing inner cylinder, magnetic blocks, a motor drive unit, and a magnetic seed desorption unit. The rotating outer cylinder and the magnetic block fixing inner cylinder are coaxially arranged, and their outer circumferential surface is a material flow area. Multiple magnetic blocks are concealed inside the rotating outer cylinder and are fixedly installed on the outer wall of the magnetic block fixing inner cylinder, arranged at intervals along the circumference and axial direction of the inner cylinder. The motor drive unit is connected to the rotating outer cylinder and drives it to rotate circumferentially around its axis. During the magnetic seed separation process, the magnetic block fixing inner cylinder remains stationary. The magnetic seed desorption unit is located on one side of the rotating outer cylinder and includes an elastic pressure plate assembly and a rinsing liquid spray assembly. The elastic pressure plate assembly elastically presses against the outer surface of the rotating outer cylinder to scrape off the magnetic seeds adsorbed on its outer surface. The rinsing liquid spray assembly works in conjunction with the elastic pressure plate assembly to continuously spray rinsing liquid towards the magnetic seed scraping area.
2. The magnetic seed rapid scraping and separation device according to claim 1, characterized in that, The elastic pressure plate assembly includes a rotating shaft, a scraper, and an elastic reset unit. The rotating shaft is horizontally positioned on one side of the rotating outer cylinder, and its axis is parallel to the central axis of the rotating outer cylinder. The scraper is loaded by the rotating shaft and performs a circumferential oscillation motion synchronously with the rotating shaft, with its end away from the rotating shaft being the scraping contact end. The elastic reset unit is drivenly connected to one end of the rotating shaft to continuously apply a restoring torque toward the rotating outer cylinder.
3. The magnetic seed rapid scraping and separation device according to claim 2, characterized in that, The elastic reset unit includes a load-bearing component, a tension spring, and a force-transmitting component; the load-bearing component is fixed to an external support structure; the force-transmitting component is sleeved on the end of the rotating shaft and fixedly connected to the rotating shaft; the tension spring is connected between the load-bearing component and the force-transmitting component, and it is always maintained in a pre-stretched state.
4. The magnetic seed rapid scraping and separation device according to claim 3, characterized in that, The number of elastic reset units is two, so as to apply restoring torque to both ends of the rotating shaft respectively.
5. The magnetic seed rapid scraping and separation device according to claim 2, characterized in that, The elastic pressure plate assembly also includes a connecting transition sheet metal part; the connecting transition sheet metal part is sleeved on the outer peripheral surface of the rotating shaft and fixedly connected to the rotating shaft; the side of the connecting transition sheet metal part facing the rotating outer cylinder is fixedly connected to the scraper.
6. The magnetic seed rapid scraping and separation device according to any one of claims 1-5, characterized in that, The flushing fluid spraying assembly includes a support rod and spray heads; the support rod spans the magnetic seed scraping area and its extension direction is parallel to the central axis of the rotating outer cylinder; multiple spray heads can be detachably installed on the support rod, and their spray nozzles are directly facing the magnetic seed scraping area.
7. The magnetic seed rapid scraping and separation device according to claim 6, characterized in that, The flushing fluid spray assembly also includes an elastic snap-fit component; the elastic snap-fit component is disposed between the support rod and the spray head, and has a semi-encircling or full-encircling structure to encircle the outer circumferential surface of the support rod; the spray head has a semi-encircling groove on the side facing the support rod; the spray head partially encircles the outer circumferential surface of the support rod through the semi-encircling groove; the elastic snap-fit component has an elastic force that contracts towards the support rod in its natural state, and after assembly, it applies radial pressure to the support rod through the elastic force, causing the spray head to adhere to the outer circumferential surface of the support rod.
8. A magnetic seed recovery machine, characterized in that, The device includes a frame, a housing, an independent modular high-speed deflocculation device, and a magnetic seed rapid scraping and separation device as described in any one of claims 1-7; the housing is supported by the frame; the high-speed deflocculation device is connected to the housing via a conveying pipeline and is used for pre-flocculation and shearing of magnetic seed-containing sludge flocs; the housing is provided with a deflocculation material transition chamber, a magnetic seed separation chamber, and a recycled magnetic seed discharge chamber along its length; the deflocculation material transition chamber is connected to the outlet of the conveying pipeline; the magnetic seed rapid scraping and separation device acts on the magnetic seed separation chamber, and the magnetic seeds separated by it enter the recycled magnetic seed discharge chamber and are recycled and reused through the outlet of the recycled magnetic seed discharge chamber.