Rice bran oil refining magnetic separator

Abstract

The invention provides a rice bran oil refining magnetic separator which comprises a rack, a magnetic separator main cylinder fixedly arranged on the rack, a magnetic suction roller rotationally arranged in the magnetic separator main cylinder, a feeding port and a discharging port formed in the magnetic separator main cylinder, and a power assembly for driving the magnetic suction roller to rotate. The size of the gap channel between the lower portion of the magnetic suction roller and the magnetic separator main cylinder is smaller than that of the gap channel between the upper portion of the magnetic suction roller and the magnetic separator main cylinder. Magnetic particles on the surface of the magnetic suction roller can be automatically and thoroughly removed, and waste of rice bran oil in waste can be reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of rice bran oil processing, in particular, to a rice bran oil refining magnetic separator. BACKGROUND

[0002] As edible vegetable oil, the quality of rice bran oil needs to meet the three core requirements of safety, sensory characteristics and nutritional stability. The mixing of magnetic particles has the following effects: magnetic particles are mostly metal debris, with a particle size usually between 10 μm-1 mm. If they remain in rice bran oil, they may scratch the oral cavity and esophageal mucosa when eaten; long-term intake of small magnetic particles (<50 μm) may also deposit in the digestive tract, causing chronic inflammation or tissue damage. Magnetic particles (especially iron and iron oxides) are strong catalysts for oil oxidation. Iron ions (Fe 2 / Fe 3 ) can accelerate the oxidation of unsaturated fatty acids (such as linoleic acid and oleic acid) in rice bran oil through the "Fenton reaction", producing harmful substances such as peroxides, aldehydes, ketones, etc. (such as malondialdehyde), leading to excessive oil acid value and peroxide value. The oxidation process also destroys the natural antioxidant components in rice bran oil (such as oryzanol and vitamin E), reducing the stability of the oil. At the same time, it produces unpleasant odors such as rancid smell, losing its edible value. If the surface of the magnetic particles is attached to microorganisms, they may also become a "carrier" for microorganisms to breed, increasing the risk of exceeding the standard for fungal toxins such as aflatoxin.

[0003] Therefore, removing magnetic particles from rice bran oil is an important step in its production process. The existing rice bran oil magnetic separator commonly consists of a magnet device, a feeding device, and a roller. Its working principle is as follows: the magnetic separator works based on the physical principle that magnetic substances will be affected by magnetic force in a magnetic field. When rice bran oil mixed with magnetic substances passes through the magnetic field area of the magnetic separator, the magnetic impurities will be attracted by the magnetic field, while the rice bran oil itself is not affected by the magnetic field or is affected very little, thereby realizing the separation of magnetic impurities and rice bran oil.

[0004] However, the above structure still has the following defects in the actual production process: 1. Grease is sticky, which will make the magnetic impurities adhere more firmly to the roller surface. Conventional cleaning methods, such as scraping with a scraper, may be difficult to completely remove, resulting in some impurities remaining. Even after preliminary scraping with a scraper, a small amount of iron powder or other impurities may still be attached to the surface of the roller; if the magnetic impurities on the roller cannot be completely cleaned, when the roller rotates, these impurities may be brought into the material being de-ironed, thereby reducing the de-ironing effect and affecting the purity of the grease; 2. If manual cleaning is used, frequent manual cleaning of the roller surface of the magnetic separator will consume a lot of manpower, increase labor costs, and also affect production efficiency, resulting in increased equipment downtime; 3. When clearing the magnetic particles on the surface of the magnetic roller, they are wasted because they are wrapped with a large amount of rice bran oil material.

[0005] In view of this, it is necessary to improve the existing magnetic separator to overcome the above-mentioned defects. Summary of the Invention

[0006] The main purpose of the invention is to provide a rice bran oil refining magnetic separator, which can not only automatically and thoroughly remove magnetic particles on the surface of a magnetic roller, but also reduce the waste of rice bran oil in waste materials.

[0007] To achieve the above-mentioned object, in a first aspect, the present invention provides a rice bran oil refining magnetic separator, comprising a frame, a magnetic separator main barrel fixedly arranged on the frame, a magnetic roller rotatably arranged in the magnetic separator main barrel, a feed port and a discharge port arranged on the magnetic separator main barrel, and a power assembly for driving the magnetic roller to rotate, wherein the magnetic roller is eccentrically arranged with respect to the magnetic separator main barrel, and a gap channel for rice bran oil circulation is provided therebetween, the feed port and the discharge port are both connected to the gap channel, the size of the gap channel between the lower part of the magnetic roller and the magnetic separator main barrel is smaller than the size of the gap channel between the upper part of the magnetic roller and the magnetic separator main barrel; the upper part of the magnetic separator main barrel has an opening, the length direction of the opening extends along the axial direction of the magnetic separator main barrel, and a heating component, a grease adsorption component, a magnetic particle scraping component and a magnetic particle collecting component are sequentially provided in the opening along the rotation direction of the magnetic roller; The grease adsorption component includes an arc-shaped shell, a flexible liposuction layer arranged on the inner side of the shell, and a first driving mechanism for driving the shell to rise and fall.

[0008] Optionally, the grease adsorption assembly also includes a transverse screw rotatably connected to the frame, a screw sleeve cooperating with the transverse screw, and a movable frame fixedly connected to the screw sleeve. The first driving mechanism is a first driving cylinder fixedly arranged on the movable frame, and the piston rod of the first driving cylinder is fixedly connected to the shell.

[0009] Optionally, the oil adsorption assembly further comprises an oil collection structure, the oil collection structure comprises a collection groove fixedly arranged in the main cylinder of the magnetic separator, the length direction of the collection groove extends along the axial direction of the main cylinder of the magnetic separator, the top of the collection groove is fixedly provided with a pressing top plate, a plurality of filter holes are formed in the pressing top plate, the flexible fat absorption layer is arranged in sliding mode relative to the shell, the middle part of the flexible fat absorption layer is fixedly provided with a hard pressing rod, and the shell and the hard pressing rod are provided with a second driving mechanism for driving the hard pressing rod to slide.

[0010] Optionally, the pressing top plate is V-shaped, and the bottom of the pressing top plate is provided with a positioning groove matched with the hard pressing rod.

[0011] Optionally, one side of the collection groove is provided with an oil discharge port, and the oil discharge port is in communication with the first suction pipeline.

[0012] Optionally, the heating assembly comprises a heating channel arranged at the bottom of the collection groove, the length direction of the heating channel extends along the axial direction of the main cylinder of the magnetic separator, and a heating medium is passed through or a heating unit is arranged in the heating channel.

[0013] Optionally, the flexible fat absorption layer is a fat absorption sponge body.

[0014] Optionally, the magnetic particle scraping assembly comprises an inclined fixedly arranged scraper body and a brush arranged at the lower end of the scraper body, the magnetic particle collection assembly comprises a material collecting groove with an opening facing the brush, and the material collecting groove is in communication with the second suction pipeline.

[0015] Optionally, the main cylinder of the magnetic separator is provided with a flow guide cover in communication with the feeding port, the upper end of the flow guide cover is in communication with the feeding port, the lower end of the flow guide cover is provided with an oil outlet near one side of the inner wall of the main cylinder of the magnetic separator, the width of the oil outlet extends along the axial direction of the main cylinder of the magnetic separator, and the width of the oil outlet is greater than the width of the feeding port.

[0016] Optionally, the power assembly comprises a variable frequency motor and a transmission structure connected between the motor shaft of the variable frequency motor and the rotating shaft of the magnetic roller.

[0017] The rice bran oil refining magnetic separator provided by the application, compared with the prior art, through the heating assembly, the viscosity of oil is reduced through heating, the oil changes from "sticky adhesion" to "flowable state", the wrapping force of oil on particles is reduced, then through the oil adsorption assembly, the flexible fat absorption layer is used to extrude and contact the surface of the magnetic attraction roller, the oil with reduced viscosity is separated from the magnetic particles adsorbed on the surface of the magnetic attraction roller by the flexible fat absorption layer, finally, the magnetic particles without oil wrapping are scraped from the magnetic attraction roller by the magnetic particle scraping assembly, and finally, the magnetic particles are collected by the magnetic particle collection assembly, so that the magnetic particles are prevented from falling into the rice bran oil, the oil adsorbed on the flexible fat absorption layer can be collected in the form of extrusion, and the oil can be recycled after treatment, so that waste is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0018] The drawings constituting a part of the application are used to provide a further understanding of the application, so that other features, objects and advantages of the application become more apparent. The illustrative embodiment drawings of the application and the description thereof are used to explain the application, and do not constitute an improper limitation on the application. In the drawings: Figure 1 is a schematic view of the application Figure 1 ; Figure 2 is a schematic view of the application Figure 2 ; Figure 3 is a schematic view of the collection tank; Figure 4 is a schematic view of the oil adsorption assembly; Figure 5 is a schematic view of the flow guide cover.

[0019] Wherein: 1, rack; 2, magnetic separator main cylinder; 3, magnetic attraction roller; 4, feed inlet; 5, discharge outlet; 6, flow guide cover; 7, shell; 8, flexible fat absorption layer; 9, hard pressure rod; 10, collection tank; 11, extrusion top plate; 12, positioning groove; 13, filter hole; 14, heating channel; 15, transverse lead screw; 16, moving frame; 17, first driving cylinder; 18, scraper body; 19, material collecting tank. DETAILED DESCRIPTION

[0020] In order for those skilled in the art to better understand the application scheme, the technical solutions in the embodiments of the application will be clearly and completely described below in combination with the drawings in the embodiments of the application. Obviously, the described embodiments are only a part of the embodiments of the application, rather than all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor should belong to the protection scope of the application.

[0021] It should be noted that the terms "first", "second", and the like in the description and in the claims of the application and the above-described accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances to implement the embodiments of the application described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or apparatus including a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or apparatuses.

[0022] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not intended to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0023] In addition, in addition to indicating the orientation or positional relationship, the above-mentioned partial terms can also be used to indicate other meanings, for example, the term "upper" can also be used to indicate a certain attachment relationship or connection relationship in some cases. For those skilled in the art, the specific meaning of these terms in the present application can be understood according to the specific circumstances.

[0024] In addition, the meaning of the term "a plurality of" should be two and more than two.

[0025] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

[0026] As Figures 1-5As shown, a rice bran oil refining magnetic separator includes a rack 1, a magnetic separator main cylinder 2 fixedly arranged on the rack 1, a magnetic suction roller rotatably arranged in the magnetic separator main cylinder 2, a feeding port 4 and a discharging port 5 arranged on the magnetic separator main cylinder 2, and a power assembly driving the magnetic suction roller to rotate. The magnetic suction roller is arranged eccentrically with the magnetic separator main cylinder 2, and a gap channel for the flow of rice bran oil is formed between the magnetic suction roller and the magnetic separator main cylinder 2. The feeding port 4 and the discharging port 5 are both in communication with the gap channel. The size of the gap channel between the lower part of the magnetic suction roller and the magnetic separator main cylinder 2 is smaller than that of the gap channel between the upper part of the magnetic suction roller and the magnetic separator main cylinder 2. The upper part of the magnetic separator main cylinder 2 has an opening, the length direction of the opening extends along the axial direction of the magnetic separator main cylinder 2, and a heating assembly, a grease adsorption assembly, a magnetic particle scraping assembly, and a magnetic particle collection assembly are sequentially arranged in the opening along the rotation direction of the magnetic suction roller. The grease adsorption assembly includes a circular-arc-shaped shell 7, a flexible grease adsorption layer 8 arranged on the inner side of the shell 7, and a first driving mechanism driving the shell 7 to ascend and descend.

[0027] The magnetic suction roller 3 can be made of a neodymium-iron-boron magnet or an electromagnet.

[0028] The power assembly includes a variable frequency motor and a transmission structure connected between the motor shaft of the variable frequency motor and the rotating shaft of the magnetic suction roller 3. The specific structure of the transmission structure is not the core design point. Currently, gear transmission, synchronous belt transmission and other modes can be used. In addition, regarding the variable frequency motor, the rotation of the magnetic suction roller 3 is not continuous. In this embodiment, the rotation mode is similar to pulse rotation, that is, the magnetic suction roller 3 stops after rotating a certain angle, and then rotates a certain angle after stopping for a period of time. The specific angle is preferably the central angle corresponding to the shell 7. When the magnetic suction roller 3 rotates in this way, the rice bran oil continuously enters the magnetic separator main cylinder 2 through the feeding port 4, and the magnetic suction roller 3 uses its strong magnetism to adsorb the magnetic particles mixed in the rice bran oil. Because the magnetic suction roller 3 and the magnetic separator main cylinder 2 are arranged eccentrically, the lower part is closer to the rice bran oil. The magnetic field of the magnetic suction roller is not uniformly covered, and there is an adsorption blind area. The magnetic field on the surface of the roller is the strongest, and it quickly decays with increasing distance (for example, the magnetic field strength at a distance of 5 mm from the surface may be reduced to 1 / 3). If the magnetic particles are wrapped in a thick layer of oil (for example, the particles are wrapped in more than 1 mm of oil), the magnetic field force may not be strong enough to penetrate the oil and pull the particles towards the roller. Therefore, the ability of the magnetic separator to adsorb magnetic particles can be improved. After a certain period of time, the magnetic suction roller rotates a certain angle, that is, it is separated from the rice bran oil. At this time, the surface of the magnetic particles adsorbed on the surface of the magnetic suction roller is wrapped in oil, and after the magnetic suction roller is separated, part of the oil falls back into the magnetic separator main cylinder 2 under the action of gravity. Therefore, the amount of oil adsorbed by the grease adsorption assembly is reduced.

[0029] And the pulse rotation mode, can give the heating component enough time to heat the surface of the magnetic roller 3, usually heated to 40-60 ℃, the temperature of the oil can be reduced by 30%-50%, at this time the viscosity of rice bran oil from 50 mPa·s to 25-35 mPa·s, oil from "thick film wrapped particles" to "free flow state", but will not cause the temperature is too high to demagnetize the magnet (neodymium iron boron magnet temperature ≤80 ℃).

[0030] Also give the oil adsorption component to the free flow state of the oil adsorption recovery, thus avoiding the phenomenon of magnetic particles wrapped by oil before being scraped off.

[0031] In addition, in order to be able to recycle the flexible fat absorption layer 8 adsorbed oil, the oil adsorption component also includes a horizontal moving screw rod 15 connected with the rack 1, a screw sleeve matched with the horizontal moving screw rod 15, a moving frame 16 fixedly connected with the screw sleeve, the first driving mechanism is a first driving cylinder 17 fixedly arranged on the moving frame 16, the piston rod of the first driving cylinder 17 is fixedly connected with the shell 7, the oil adsorption component also includes an oil collection structure, the oil collection structure includes a collection groove 10 fixedly arranged in the magnetic separator main cylinder 2, the length direction of the collection groove 10 extends along the axial direction of the magnetic separator main cylinder 2, the top of the collection groove 10 is fixedly provided with a extrusion top plate 11, a plurality of filter holes 13 are formed in the extrusion top plate 11, the flexible fat absorption layer 8 is slidably arranged relative to the shell 7, a hard pressure rod 9 is fixedly arranged in the middle of the flexible fat absorption layer 8, a second driving mechanism for driving the hard pressure rod 9 to slide is arranged between the shell 7 and the hard pressure rod 9, an oil outlet is formed in one side of the collection groove 10, and the oil outlet is in communication with a first suction pipeline.

[0032] The flexible fat absorption layer 8 adopts a fat absorption sponge body, and adopts "sponge fat absorption" instead of "scraping plate scraping oil", and the oil is removed by capillary action instead of external force scraping, the pulling force of the fat absorption process on the particles is less than 0.05N (much smaller than the adsorption force of the magnetic field on the particles greater than 0.5N), which ensures that the particles are always adsorbed on the surface of the roller by the magnetic field.

[0033] When the flexible fat absorption layer 8 absorbs oil, the horizontal moving screw rod 15 rotates to drive the moving frame 16 to move horizontally to the upper side of the oil collection structure by the screw sleeve, at this time the first driving mechanism drives the shell 7 to slide downward to contact the oil collection structure, and then the second driving mechanism drives the hard pressure rod 9 to slide, so that the flexible fat absorption layer 8 is pressed against the extrusion top plate 11, and the oil adsorbed by the flexible fat absorption layer 8 enters the collection groove 10 through the filter holes 13, and finally the oil in the collection groove 10 is removed and collected by the suction pump through the first suction pipeline for subsequent processing and recycling. The second driving mechanism can also adopt a cylinder structure, and the specific structure is not described here.

[0034] In order to further provide the effect of extruding oil, the extruding top plate 11 is V-shaped, and the bottom of the extruding top plate 11 has a positioning groove 12 matched with the hard pressure rod 9, the hard pressure rod 9 is preferably a round rod, and the positioning groove 12 is arc-shaped. The second driving mechanism presses the hard pressure rod 9 into the positioning groove 12, at this time the flexible oil absorption layer 8 is extruded, and the oil adsorbed by the flexible oil absorption layer 8 can be recovered, and after recovery, the flexible oil absorption layer 8 is reset for the next stage of oil adsorption.

[0035] In order to save installation space and prevent the recovered oil from solidifying and adhering to the inner wall of the collection groove 10, the heating assembly includes a heating channel 14 arranged at the bottom of the collection groove 10. The length direction of the heating channel 14 extends along the axial direction of the main cylinder 2 of the magnetic separator. The heating channel 14 passes through a heating medium or is provided with a heating unit, so that the heating channel 14 not only heats the surface of the magnetic roller 3, but also heats the oil collected in the collection groove 10, thereby improving the fluidity of the oil, which facilitates the oil to separate from the surface of the magnetic roller 3 and prevents the oil from adhering to the inner wall of the collection groove 10 during collection. It should be noted that the heating medium can be high-temperature gas or fluid, such as heat-conducting oil or hot water. When gas heating is used, a heating element such as a heat-conducting wire can be arranged in the heating channel 14 to heat the oil. The heating temperature is maintained at 40-60°C by temperature setting. In order to improve the heating efficiency and the uniformity of the heating area, the end face of the bottom of the heating channel 14 is arc-shaped and matched with the surface of the magnetic roller 3.

[0036] Preferably, the magnetic particle scraping assembly includes an inclined fixed scraper body 18 and a brush arranged at the lower end of the scraper body 18. The magnetic particle collection assembly includes a material collecting groove 19 with an opening facing the brush, and the material collecting groove 19 is connected with a second suction pipe. The brush is made of nylon or silicone material, which can effectively clean the residual magnetic particles and avoid damaging the surface of the roller. The magnetic particles scraped by the brush fall into the material collecting groove 19 and are cleaned through negative pressure suction from the second suction pipe to avoid falling into the rice bran oil again.

[0037] In order to make the distribution of the rice bran oil even when it is fed, a flow guide cover 6 is arranged in the main cylinder 2 of the magnetic separator and is communicated with the feeding port 4. The upper end of the flow guide cover 6 is communicated with the feeding port 4, and the lower end is provided with an oil outlet near one side of the inner wall of the main cylinder 2. The width of the oil outlet extends along the axial direction of the main cylinder 2, and the width of the oil outlet is greater than the width of the feeding port 4. After the rice bran oil enters the feeding port 4, it is evenly dispersed along the axial direction of the main cylinder 2 under the action of the flow guide cover 6, and then gradually enters the gap channel. The magnetic particles mixed therein are adsorbed by the strong magnetism of the magnetic roller 3, and finally accumulated to a certain depth and discharged from the discharge port 5. The discharge port 5 is connected with a discharge pipe, and a discharge valve is arranged on the discharge pipe. After the discharge valve is opened, the rice bran oil after magnetic separation can be discharged to enter the next process.

[0038] The preferred embodiments of the present application have been described above, but the present application is not limited to the above. Various modifications and changes can be made by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A rice bran oil refining magnetic separator, characterized in that, The magnetic separator comprises a frame, a main cylinder of a magnetic separator fixedly arranged on the frame, a magnetic roller rotatably arranged in the main cylinder of the magnetic separator, a feed port and a discharge port provided on the main cylinder of the magnetic separator, and a power assembly for driving the magnetic roller to rotate, wherein the magnetic roller and the main cylinder of the magnetic separator are eccentrically arranged, and a gap channel for the circulation of rice bran oil is provided between the two, the feed port and the discharge port are both connected to the gap channel, and the size of the gap channel between the lower part of the magnetic roller and the main cylinder of the magnetic separator is smaller than the size of the gap channel between the upper part of the magnetic roller and the main cylinder of the magnetic separator; The upper portion of the magnetic separator main cylinder has an opening, the length direction of the opening extends along the axial direction of the magnetic separator main cylinder, and a heating component, a grease adsorption component, a magnetic particle scraping component, and a magnetic particle collecting component are sequentially arranged in the opening along the rotation direction of the magnetic attraction drum; The grease adsorption component includes an arc-shaped shell, a flexible liposuction layer arranged on the inner side of the shell, and a first driving mechanism for driving the shell to rise and fall.

2. a kind of rice bran oil refining magnetic separator as claimed in claim 1, is characterized in that: The grease adsorption assembly also includes a transverse screw rotatably connected to the frame, a screw sleeve cooperating with the transverse screw, and a movable frame fixedly connected to the screw sleeve. The first driving mechanism is a first driving cylinder fixedly arranged on the movable frame, and the piston rod of the first driving cylinder is fixedly connected to the shell.

3. a kind of rice bran oil refining magnetic separator as claimed in claim 2, is characterized in that: The grease adsorption component also includes a grease collection structure, which includes a collection tank fixedly arranged in the main cylinder of the magnetic separator, the length direction of the collection tank extending along the axial direction of the main cylinder of the magnetic separator, an extrusion top plate fixedly arranged on the top of the collection tank, a plurality of filter holes are opened on the extrusion top plate, the flexible liposuction layer is slidably arranged relative to the shell, a hard pressure rod is fixedly arranged in the middle of the flexible liposuction layer, and a second driving mechanism for driving the hard pressure rod to slide is provided between the shell and the hard pressure rod.

4. a kind of rice bran oil refining magnetic separator as claimed in claim 3, is characterized in that: The extruded top plate is V-shaped, and the bottom of the extruded top plate has a positioning groove adapted to the hard pressure rod.

5. A rice bran oil refining magnetic separator as claimed in claim 3, characterized in that: An oil drain port is provided on one side of the collecting tank, and the oil drain port is communicated with the first suction pipe.

6. A rice bran oil refining magnetic separator as claimed in claim 3, characterized in that: The heating component includes a heating channel arranged at the bottom of the collecting tank. The length direction of the heating channel extends along the axial direction of the main cylinder of the magnetic separator. A heating medium passes through the heating channel or a heating unit is provided.

7. A rice bran oil refining magnetic separator as claimed in claim 1, characterized in that: The flexible liposuction layer adopts a liposuction sponge.

8. A rice bran oil refining magnetic separator as claimed in claim 1, characterized in that: The magnetic particle scraping assembly includes a scraper body that is fixedly arranged at an angle, and a brush arranged at the lower end of the scraper body. The magnetic particle collecting assembly includes a collection trough with an opening facing the brush, and the collection trough is connected to a second suction pipe.

9. A rice bran oil refining magnetic separator as claimed in claim 1, characterized in that: A flow guide cover connected to the feed port is provided in the main cylinder of the magnetic separator. The upper end of the flow guide cover is connected to the feed port, and the lower end thereof is provided with an oil outlet on one side close to the inner wall of the main cylinder of the magnetic separator. The width of the oil outlet extends along the axial direction of the main cylinder of the magnetic separator, and the width of the oil outlet is greater than the width of the feed port.

10. A rice bran oil refining magnetic separator as claimed in claim 1, characterized in that: The power assembly includes a variable frequency motor and a transmission structure connected between the motor shaft of the variable frequency motor and the rotating shaft of the magnetic roller.

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