Multi-stage magnetic separation impurity removal device for vinasse

Abstract

The utility model discloses a multi-stage magnetic separation impurity removal device for vinasse. The multi-stage magnetic separation impurity removal device comprises a feeding system, a multi-stage magnetic separation system and a discharge port, the multi-stage magnetic separation system comprises three sections of magnetic separation devices, the three sections of magnetic separation devices are the same in structure, but the magnetism of magnetic materials on the outer surfaces of magnetic separation rollers included in the three sections of magnetic separation devices is sequentially enhanced; the rotating speed of the driving device is sequentially increased. Any magnetic separation device comprises a magnetic separation roller, a driving device and a discharging device; the magnetic separation roller is hollow and cylindrical, and a horizontally arranged main shaft is arranged in the center of the magnetic separation roller; a magnetic material is arranged on the outer surface and comprises a plurality of strip-shaped magnets, and the south pole and the north pole of each strip-shaped magnet are alternately arranged; the discharging device comprises a scraper device, a brush device, a discharging opening and a discharging groove. The scraper device makes contact with the surface of the magnetic separation roller, the brush device is matched with the scraper device, and the discharging opening is formed in the end, away from the feeding system, of the magnetic separation roller. According to the multi-stage magnetic separation device, the magnetism and the rotating speed are gradually increased, and it is ensured that impurities of different sizes can be removed.

Description

Technical Field

[0001] This application relates to the field of distillers' grains, and more particularly to a multi-stage magnetic separation and impurity removal device. Background Technology

[0002] In the process of treating distiller's grains, especially when using magnetic separation equipment to remove ferromagnetic impurities, existing magnetic separation equipment is typically designed primarily for larger ferromagnetic particles such as iron filings, screws, and iron sheets. These devices operate on the principle of magnetic attraction; however, when the particle size becomes extremely small, the magnetic attraction weakens, making it difficult to effectively adsorb and separate these small particles. In other words, they are ineffective at removing fine ferromagnetic particles such as iron powder and tiny iron filings. Utility Model Content

[0003] To address the aforementioned issues, this application provides a multi-stage magnetic separation and impurity removal device for distiller's grains, which can effectively improve the removal efficiency of fine ferromagnetic particles, thereby improving the quality of distiller's grains.

[0004] To achieve the objectives of this application, the following technical solution is provided:

[0005] This application provides a multi-stage magnetic separation and impurity removal device for distiller's grains, comprising: a feeding system, a multi-stage magnetic separation system, and a discharge port; the multi-stage magnetic separation system includes at least three magnetic separation stages.

[0006] Each magnetic separator includes a magnetic separator drum, a drive unit, a support unit, a discharge unit, and a base. The magnetic separator drum is a hollow cylinder with a horizontally arranged main shaft at its center. Its outer surface is covered with a magnetic material, which includes multiple bar magnets, each with alternating south and north poles. The end of the magnetic separator drum closer to the feeding system is higher than the end further away from the feeding system. The support unit includes a bearing and a bearing housing. The bearing housing fixes the bearing to the base, and the bearing is connected to the main shaft of the magnetic separator drum to support its rotation. The drive unit is connected to the magnetic separator drum to adjust its rotational speed.

[0007] The discharge device includes a scraper device, a brush device, and a discharge trough; the scraper device contacts the surface of the magnetic separator drum, the brush device cooperates with the scraper device, and the discharge trough is located below the magnetic separator drum.

[0008] The three-stage magnetic separator is connected in series by belts; the magnetic properties of the magnetic material on the outer surface of the magnetic separator drum of the three-stage magnetic separator increase sequentially; the rotational speed of the drive device of the three-stage magnetic separator increases sequentially.

[0009] In one possible implementation, the diameter of the magnetic separator drums in the three-section magnetic separator decreases sequentially.

[0010] In one possible implementation, the discharge device includes at least two scraper devices.

[0011] In one possible implementation, the drive device includes a motor and a reducer, the motor and the reducer being connected by a coupling, and the reducer being connected to the main shaft of the magnetic drum; the motor drives the magnetic drum to rotate through the reducer.

[0012] In one possible implementation, the surface of the magnetic rollers is covered with spiral grooves or roller patterns.

[0013] In one possible implementation, the plurality of bar magnets may be distributed in a manner that is uniformly arranged along the radial direction of the roller or uniformly arranged along the axial direction of the roller.

[0014] In one possible implementation, the impurity removal device is equipped with an automatic brushing device for periodically cleaning the magnetic separator drum and the screening device.

[0015] In one possible implementation, the bearing is a deep groove ball bearing, a cylindrical roller bearing, or a self-aligning bearing.

[0016] Beneficial effects: The multi-stage magnetic separation device for removing impurities from distiller's grains provided in this application, through multiple stages of magnetic separation, progressively increases the magnetism and rotational speed, ensuring that magnetic impurities of different sizes can be effectively removed. Each stage of the magnetic separation device has the same structure, facilitating manufacturing and maintenance. The rotational speed of the magnetic separation drum is adjusted by a drive device, achieving automated control and improving production efficiency. Attached Figure Description

[0017] The accompanying drawings are provided to further understand this application and form part of the specification. They are used together with the embodiments of this application to explain this application and do not constitute a limitation thereof.

[0018] Figure 1 This is a schematic diagram of the structure of a magnetic separation device provided in an embodiment of this application;

[0019] Figure 2 This is a schematic diagram of the scraper device provided in an embodiment of this application.

[0020] In the diagram, 1 is the magnetic separator drum; 11 is the main shaft; 12 is the bar magnet; 2 is the drive unit; 21 is the electric motor; 22 is the reducer; 3 is the support device; 4 is the discharge device; 41 is the scraper device; 42 is the brush device; 43 is the discharge chute; and 5 is the belt. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0022] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature; in the description of this application, unless otherwise stated, "multiple" means two or more.

[0023] Figure 1-2 A multi-stage magnetic separation device for removing impurities from distiller's grains, provided in this application embodiment, includes: a feeding system, a multi-stage magnetic separation system, and a discharge port; the multi-stage magnetic separation system comprises at least three magnetic separation stages.

[0024] Any magnetic separator includes a magnetic separator drum 1, a drive unit 2, a support unit 3, a discharge unit 4, and a base. The magnetic separator drum 1 is a hollow cylinder with a horizontally arranged main shaft 11 at its center. Its outer surface is covered with magnetic material, which includes multiple bar magnets 12, with the south and north poles of each bar magnet 12 alternating. The end of the magnetic separator drum 1 closer to the feeding system is higher than the other end farther from the feeding system. The support unit 3 includes a bearing and a bearing housing, which fixes the bearing to the base. The bearing is connected to the main shaft 11 of the magnetic separator drum 1 to support the rotation of the magnetic separator drum 1. The drive unit 2 is connected to the magnetic separator drum to adjust the rotation speed of the magnetic separator drum 1.

[0025] The discharge device 4 includes a scraper device 41, a brush device 42, and a discharge trough 43; the scraper device 41 contacts the surface of the magnetic separator drum 1, the brush device 42 cooperates with the scraper device 41, and the discharge trough 43 is located below the magnetic separator drum 1.

[0026] The three-stage magnetic separator is connected in series via belt 5; the magnetic properties of the magnetic material on the outer surface of the magnetic separator drum 1 of the three-stage magnetic separator increase sequentially; the rotational speed of the drive device 2 of the three-stage magnetic separator increases sequentially.

[0027] In this embodiment, the magnetic material on the outer surface of the magnetic separator drum 1 of the three-stage magnetic separator exhibits progressively stronger magnetism. Each drum is equipped with a magnetic field of different intensities to gradually remove ferromagnetic impurities. A design combining weak and strong magnetic fields ensures that impurities are separated sequentially according to their magnetic strength. The first magnetic separator has a lower intensity and is primarily used to remove larger, stronger ferromagnetic particles. The drive device 2 can operate at a lower speed. The second magnetic separator has a higher intensity than the first, with moderate strength, and is primarily used to remove medium-sized and strong ferromagnetic impurities. The third magnetic separator has an even higher intensity than the second and is primarily used to remove smaller ferromagnetic particles. The drive device 2 can operate at a higher speed. In one possible implementation, the diameter of the magnetic separator drum 1 of the three-stage magnetic separator decreases progressively.

[0028] From a physics perspective, arranging magnetic materials on the outer surface of a magnetic separator drum to progressively enhance its magnetism requires comprehensive consideration of factors such as the properties of the magnetic materials, the generation and distribution of the magnetic field. The first step is selecting the appropriate magnetic material based on the separation requirements and magnetic field performance specifications. Examples include ferrite and neodymium iron boron (NdFeB). Ferrite magnetic materials are relatively inexpensive and have good corrosion resistance, but their magnetism is relatively weak. NdFeB magnetic materials, on the other hand, possess high remanence, high coercivity, and high energy product, generating a very strong magnetic field, making them suitable for magnetic separation applications requiring strong magnetic fields.

[0029] Secondly, there are the magnetic property parameters: remanence B. r And coercivity H. Remanence determines a material's ability to retain a magnetic field after magnetization, while coercivity reflects a material's resistance to demagnetization. As mentioned above, to achieve a sequential increase in magnetism, magnetic materials with a gradient in remanence and coercivity should be selected. Specifically, in a three-stage magnetic separator, the first stage magnetic separator drum can use ferrite bar magnets with a remanence of 0.3T and a coercivity of 200kA / m as the magnetic material. The second stage uses ferrite with a remanence of 0.5T and a coercivity of 300kA / m, thus enhancing the magnetic field strength. In the third stage magnetic separator, neodymium iron boron bar magnets are used, with a remanence of 1.2T and a coercivity of 900kA / m, significantly increasing the magnetic field strength and achieving a sequential increase in magnetism.

[0030] In addition, the magnetic field strength can be enhanced by changing the spacing between the bar magnets. For example, in the first magnetic separator, the spacing between the bar magnets on the magnetic separator drum is 5cm to ensure basic magnetic field coverage. In the second section, the spacing is reduced to 3cm to make the magnetic field distribution denser and enhance the magnetic field strength. In the third section, the spacing is further reduced to 2cm to strengthen the local magnetic field strength, thereby enhancing the overall magnetic field strength.

[0031] It should be noted that in order to ensure that the adsorbed impurities are removed in a timely manner, a discharge device 4 is provided. Through the combination of the brush device 42 and the scraper device 41, the magnetic impurities adsorbed on the surface of the roller are scraped off and discharged in a timely manner through the discharge port and discharge trough 43.

[0032] This ensures better impurity removal. The scraper can be made of wear-resistant, corrosion-resistant, and flexible materials, such as polyurethane or high-strength rubber. Polyurethane scrapers have strong wear resistance and can effectively cope with long-term friction with the surface of the magnetic separator drum 1; high-strength rubber scrapers have good flexibility and can closely adhere to the surface of the magnetic separator drum 1, improving the effect of scraping impurities while reducing damage to the drum surface. The working part of the scraper adopts an arc-shaped design, matching the curvature of the surface of the magnetic separator drum 1, to ensure uniform contact with the drum surface along the entire length of the scraper. Its radius of curvature is adapted to the radius of the magnetic separator drum 1, and the edges of the scraper should be finely ground to avoid sharp edges scratching the drum surface. The scraper is installed at the end near the discharge port of the magnetic separator drum 1 and maintains close contact with the surface of the magnetic separator drum 1 to ensure timely scraping off of magnetic impurities adsorbed on the drum surface. During installation, ensure that the center line of the scraper is parallel to the axis of the magnetic separator drum 1 to avoid tilting and uneven scraping. The angle between the scraper and the surface of the magnetic separator drum 1 is controlled between 45° and 60°. This angle range ensures that the scraper has sufficient scraping force against impurities without causing excessive pressure on the drum surface due to an excessively large angle, which would affect the normal operation and service life of the drum. The installation angle can be precisely adjusted by adjusting the mounting bracket of the scraper. In one possible embodiment, the discharge device 4 includes at least two scraper devices 41. By installing multiple scrapers at different positions on the magnetic separator drum 1, a multi-stage scraping structure is formed. This allows impurities to be scraped multiple times as they rotate with the magnetic separator drum 1, improving the thoroughness of removal.

[0033] Furthermore, with reference to the rotation direction of the magnetic separator 1, the brush is installed behind the scraper, closely adjacent to it, with a distance of 1-2 cm between them. This distance ensures that the brush can contact the scraper in a timely manner without causing collisions or interference due to excessive proximity. Simultaneously, the brush bristle length should be adjusted according to the scraper thickness to ensure that the bristles fully cover the scraper surface for thorough cleaning. The brush rotates in the opposite direction to the magnetic separator 1, utilizing the friction generated by relative motion to more effectively remove impurities from the scraper. For example, if the magnetic separator 1 rotates clockwise, the brush rotates counterclockwise. The brush's rotation speed should be slightly higher than that of the magnetic separator 1, generally set to 1.2-1.5 times the rotation speed of the magnetic separator 1 to enhance the cleaning effect. The brush rotation requires an independent drive unit 2 to provide a stable power source to ensure its operation in the predetermined manner. The drive unit 2 can be a small motor, transmitted to the brush shaft via a belt 5 or coupling.

[0034] By adopting the above technical solution, a multi-stage magnetic separator is used to progressively increase magnetism and rotational speed, ensuring that magnetic impurities of different sizes can be effectively removed. Each stage of the magnetic separator has the same structure, facilitating manufacturing and maintenance. The rotational speed of the magnetic separator drum 1 is adjusted by the drive device 2, achieving automated control and improving production efficiency.

[0035] In one possible implementation, the drive device 2 includes a motor 21 and a reducer 22, with the motor 21 and the reducer 22 connected by a coupling, and the reducer 22 connected to the main shaft 11 of the magnetic drum; the motor 21 drives the magnetic separator drum 1 to rotate through the reducer 22.

[0036] By adopting the above technical solution, the motor 21 drives the magnetic separator drum 1 to rotate through the reducer 22, which can precisely control the speed of the drum and adapt to the magnetic separation requirements at different stages. The use of the reducer 22 reduces the load on the motor 21 and extends the service life of the equipment.

[0037] By adjusting the speed of the motor 21, the speed of the magnetic separator drum 1 can be flexibly controlled to adapt to the processing needs of different materials and improve the magnetic separation effect.

[0038] In one possible implementation, the surface of the magnetic rollers is covered with spiral grooves or roller patterns.

[0039] By adopting the above technical solution, the magnetic drum surface has spiral grooves or roller patterns, which increases the contact area between the material and the drum surface, thereby improving magnetic separation efficiency. At the same time, the spiral design helps to ensure uniform material distribution and flow, preventing material accumulation and improving processing efficiency.

[0040] As a feasible implementation, the multiple bar magnets 12 can also be distributed in a way that they are evenly arranged along the radial direction of the roller or evenly arranged along the axial direction of the roller.

[0041] In this embodiment, the multiple bar magnets 12 are uniformly arranged along the radial direction of the drum: the multiple bar magnets 12 are uniformly arranged along the radial direction of the magnetic separation drum 1, that is, in a direction perpendicular to the drum axis. The S pole and N pole of each bar magnet 12 are arranged alternately to form a uniform magnetic field distribution. A specific arrangement is as follows: the outer surface of the magnetic separation drum 1 is divided into multiple annular regions, and a set of bar magnets 12 is arranged in each annular region. The number and spacing of each set of bar magnets 12 are determined according to the diameter of the drum and the magnetic separation requirements, ensuring that the magnetic field covers the entire drum surface. The length of the bar magnets 12 is consistent with the axial length of the drum, ensuring that the magnetic field is uniformly distributed throughout the entire length of the drum. The bar magnets 12 arranged along the radial direction can form a uniform radial magnetic field on the drum surface, enhancing the adsorption capacity for impurities. Because the S pole and N pole of the magnets are arranged alternately, the magnetic field forms a periodic change on the drum surface, which helps to improve the separation efficiency of impurities.

[0042] The bar magnets 12 are uniformly arranged along the axial direction of the drum. Multiple bar magnets 12 are arranged uniformly along the axial direction of the magnetic separation drum 1, that is, parallel to the drum's axis. The S and N poles of each bar magnet 12 are alternately arranged, forming a uniform magnetic field distribution. A specific arrangement is as follows: the outer surface of the magnetic separation drum 1 is divided into multiple axial regions, and a group of bar magnets 12 is arranged in each axial region. The number and spacing of each group of bar magnets 12 are determined according to the length of the drum and the magnetic separation requirements, ensuring that the magnetic field covers the entire drum surface. The length of the bar magnets 12 is consistent with the circumference of the drum, ensuring that the magnetic field is uniformly distributed throughout the entire circumference of the drum. The bar magnets 12 arranged along the axial direction can form a uniform axial magnetic field on the drum surface, enhancing the adsorption capacity for impurities. Because the S and N poles of the magnets are alternately arranged, the magnetic field on the drum surface forms a periodic change, which helps to improve the separation efficiency of impurities.

[0043] Furthermore, the two arrangements described above can be combined, that is, bar magnets 12 arranged along both the radial and axial directions can be simultaneously placed on the drum surface. For example, a set of bar magnets 12 arranged along the radial direction can be placed on the drum surface first, followed by another set of bar magnets 12 arranged along the axial direction. The density and spacing of the two sets of magnets can be adjusted according to actual needs to ensure that the magnetic field covers the entire drum surface. This combined arrangement can create a multi-dimensional magnetic field distribution on the drum surface, enhancing the adsorption capacity for impurities and thus improving magnetic separation efficiency.

[0044] It should be noted that the bar magnet 12 can be fixed to the surface of the roller by means of bolts, adhesives or embedding, to ensure that the magnet will not fall off during high-speed rotation.

[0045] By adopting the above technical solution, the bar magnets 12 can be uniformly arranged along the radial or axial direction of the drum, allowing for adjustment of the magnetic field distribution according to actual needs and enhancing the adsorption effect on impurities. Different arrangement methods can adapt to impurities of different types or particle sizes, improving the flexibility and adaptability of magnetic separation.

[0046] In one possible implementation, the impurity removal device is equipped with an automatic brushing device for periodically cleaning the magnetic separator drum 1 and the screening device.

[0047] By adopting the above technical solution, the automatic brushing device can periodically clean the magnetic separator drum 1 and the screening device, preventing impurities from accumulating and affecting the magnetic separation effect, and ensuring the continuous and efficient operation of the equipment. The automated design reduces manual intervention, lowers maintenance costs, and improves equipment reliability.

[0048] In one possible implementation, the bearing is a deep groove ball bearing, a cylindrical roller bearing, or a self-aligning bearing.

[0049] By adopting the above technical solutions, using deep groove ball bearings, cylindrical roller bearings, or self-aligning bearings, the appropriate bearing type can be selected according to different load and speed requirements, ensuring the smooth operation of the magnetic separator drum 1. Different types of bearings have different load-bearing capacities and service lives, which can improve the stability and durability of the equipment.

[0050] Working principle: The distiller's grains enter the first magnetic separator through the feeding system. As the magnetic separator drum 1 rotates, magnetic impurities are adsorbed onto the drum surface, while non-magnetic materials continue to flow forward. The scraper device 41 and brush device 42 scrape off the magnetic impurities adsorbed on the drum surface and discharge them through the discharge chute 43. The material then passes through the second and third magnetic separators in sequence. The magnetism of the magnetic material and the drum rotation speed gradually increase, ensuring that magnetic impurities of different sizes can be effectively removed. Finally, the distiller's grains, after undergoing multi-stage magnetic separation, are discharged from the outlet, completing the impurity removal process.

[0051] In the embodiments provided in this application, it should be understood that the disclosed systems, modules, and methods can be implemented in other ways. For example, the module embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces, or indirect coupling or communication connection between modules or units, and may be electrical, mechanical, or other forms.

[0052] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit it. This application is not limited to the exact structures described above and illustrated in the accompanying drawings, and it should not be considered that the specific implementation of this application is limited to these descriptions. For those skilled in the art, various changes and modifications made without departing from the concept of this application should be considered to fall within the protection scope of this application.

Claims

1. A multi-stage magnetic separation and impurity removal device for distiller's grains, characterized in that, include: The system comprises a feeding system, a multi-stage magnetic separation system, and a discharge port; the multi-stage magnetic separation system includes at least three magnetic separation devices. Each magnetic separator includes a magnetic separator drum, a drive unit, a support unit, a discharge unit, and a base. The magnetic separator drum is a hollow cylinder with a horizontally arranged main shaft at its center. Its outer surface is covered with a magnetic material, which includes multiple bar magnets, each with alternating south and north poles. The end of the magnetic separator drum closer to the feeding system is higher than the end further away from the feeding system. The support unit includes a bearing and a bearing housing. The bearing housing fixes the bearing to the base, and the bearing is connected to the main shaft of the magnetic separator drum to support its rotation. The drive unit is connected to the magnetic separator drum to adjust its rotational speed. The discharge device includes: a scraper device, a brush device, and a discharge trough; The scraper device contacts the surface of the magnetic separator drum, the brush device cooperates with the scraper device, and the discharge chute is located below the magnetic separator drum. The three-stage magnetic separator is connected in series by belts; the magnetic properties of the magnetic material on the outer surface of the magnetic separator drum of the three-stage magnetic separator increase sequentially; the rotational speed of the drive device of the three-stage magnetic separator increases sequentially.

2. The multi-stage magnetic separation and impurity removal device for distiller's grains according to claim 1, characterized in that, The diameters of the magnetic separator drums in the three-stage magnetic separator decrease sequentially.

3. The multi-stage magnetic separation and impurity removal device for distiller's grains according to claim 1, characterized in that, The discharge device includes at least two scraper devices.

4. The multi-stage magnetic separation and impurity removal device for distiller's grains according to claim 1, characterized in that, The driving device includes a motor and a reducer. The motor and the reducer are connected by a coupling. The reducer is connected to the main shaft of the magnetic drum. The motor drives the magnetic drum to rotate through the reducer.

5. The multi-stage magnetic separation and impurity removal device for distiller's grains according to claim 1, characterized in that, The surface of each magnetic roller has spiral grooves or roller patterns.

6. The multi-stage magnetic separation and impurity removal device for distiller's grains according to claim 1, characterized in that, The multiple bar magnets can also be distributed in a way that they are evenly arranged along the radius of the roller or evenly arranged along the axis of the roller.

7. The multi-stage magnetic separation and impurity removal device for distiller's grains according to claim 1, characterized in that, The impurity removal device is equipped with an automatic brushing device for periodically cleaning the magnetic separator drum and screening device.

8. The multi-stage magnetic separation and impurity removal device for distiller's grains according to claim 1, characterized in that, The bearing is a deep groove ball bearing, a cylindrical roller bearing, or a self-aligning bearing.

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