Rice bran recovery device for rice processing

By designing a rice bran recycling device for rice processing, using stirring blades and fans to remove dust, and combining flexible pads and guide plates to improve screening efficiency, the problems of uneven stirring, dust pollution and blockage in traditional rice bran recycling are solved, thereby improving rice bran quality and production efficiency.

CN223571330UActive Publication Date: 2025-11-21QIANJIANG TONGCHENG AGRI INDUSTRIALIZATION DEV CO LTD
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Patent Information

Application Number
CN202422780115.9
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-11-14
Publication Date
2025-11-21
Estimated Expiration
2034-11-14

AI Technical Summary

Technical Problem

Traditional rice bran recycling methods suffer from problems such as uneven mixing, severe dust pollution, low screening efficiency, and collection blockage, which affect the quality of rice bran and production efficiency, and increase processing costs and environmental pollution risks.

Method used

Design a rice bran recycling device for rice processing, comprising an upper chamber and a lower chamber. It utilizes stirring blades for thorough stirring, a fan to adsorb dust, a flexible pad to improve screening efficiency, and a guide plate to guide the flow of rice bran and avoid clogging.

Benefits of technology

It achieves uniform mixing of rice bran, effectively removes dust, improves screening and collection efficiency, reduces environmental pollution, and ensures production stability and resource utilization value.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model is applicable to the technical field of rice bran recovery devices, and provides a rice bran recovery device for rice processing, which comprises a recovery bin, the mounting frame is arranged in the recycling bin and divides the recycling bin into an upper cavity and a lower cavity; a screen is arranged in the mounting frame; a group of mounting shafts are symmetrically arranged in the upper cavity; a rotating rod and a plurality of stirring blades are rotationally matched in the two mounting shafts; dust and light impurities are efficiently removed through the dust guide branch pipe and the anti-blocking net and are fed into the washing tank to be soaked, so that rice bran is uniformly stirred, and the cleanliness of a working environment is improved; in order to improve the screening effect, the device adopts an electric push rod to push a flexible pad to apply vibration pressure to the screen, and the screening efficiency is remarkably improved; the first guide plate and the second guide plate arranged in the lower cavity effectively guide the screened rice bran particles to smoothly flow along a set path, and the problem that the rice bran is accumulated or blocked in the lower cavity is solved.
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Description

TECHNICAL FIELD

[0001] The utility model belongs to rice bran recovery device technical field especially relates to a rice bran recovery device for rice processing. BACKGROUND

[0002] In the rice processing process, rice bran as indispensable by-product, its effective recovery and reasonable utilization has important role to promote overall production efficiency, optimize resource allocation and enhance economic benefit, however, the traditional rice bran recovery mode exposes many urgent to be solved short board in actual operation,

[0003] Specifically, uneven stirring is one of the primary problems, which not only makes the agglomerates in rice bran difficult to be effectively broken, but also makes the subsequent screening and separation work more difficult, thereby affecting the quality and purity of rice bran, in addition, serious dust pollution is also a big drawback of the traditional recovery mode, a large amount of dust and light impurities are released into the air during stirring and screening, which not only deteriorates the working environment and increases the health risk of workers, but also may pollute the surrounding environment and increase the difficulty and cost of environmental governance,

[0004] Low screening efficiency is another problem that cannot be ignored, the traditional screening equipment has unsatisfactory screening effect, and the impurities in rice bran are difficult to be completely removed, which affects the subsequent utilization value of rice bran, at the same time, rice bran is easy to accumulate in the pipeline or collector during collection, causing blockage, which not only affects the recovery efficiency, but also may cause equipment failure, increase maintenance cost and risk of production interruption. SUMMARY

[0005] The utility model provides a rice bran recovery device for rice processing, aims at solving the problem that the traditional rice bran recovery mode has obvious deficiencies in the key links such as stirring, screening and collection, these problems not only seriously restrict the quality improvement and efficient utilization of rice bran, but also increase the processing cost and environmental pollution risk.

[0006] The utility model is such implementation, a rice bran recovery device for rice processing, including recovery bin, install frame in the recovery bin, install frame divides recovery bin into upper cavity and lower cavity, install frame is provided with screen cloth in, wherein, a group of installation shaft is arranged in the upper cavity, two installation shafts are provided with same rotating rod in rotation cooperation, the outside of rotating rod is provided with a plurality of stirring vane, servo motor is established in the outer wall of recovery bin one side, the output end of servo motor and the end of rotating rod key fixed connection, the lower cavity is provided with a group of mounting block on the side of install frame, electric push rod is established in two mounting blocks, flexible pad is established in the telescopic end of two electric push rod, flexible pad is opposite to screen cloth.

[0007] Preferably, the inner wall of one side of the lower cavity is provided with a first guide plate with a downwardly distributed inclination, and the inner wall of the opposite side of the lower cavity is provided with a second guide plate with a downwardly distributed inclination.

[0008] Preferably, the first guide plate is higher than the second guide plate in the vertical direction.

[0009] Preferably, the outer wall of the recycling bin is provided with a fan, the suction end of the fan is communicated with a dust guide main pipe, and the dust guide main pipe extends to the inside of the upper cavity and the lower cavity and is communicated with dust guide branch pipes.

[0010] Preferably, the lower part of the recycling bin is provided with a water washing box adjacent to the fan, and the exhaust end of the fan is communicated with the water washing box.

[0011] Preferably, one end of the dust guide branch pipe located in the recycling bin is provided with an anti-blocking net.

[0012] Preferably, the top of the recycling bin is provided with a feeding port communicated with the inner cavity, and the feeding port is hingedly connected with a bin cover.

[0013] Preferably, the lower part of the recycling bin is provided with a discharge port communicated with the inner cavity.

[0014] Compared with the prior art, the embodiments of the present application have the following beneficial effects:

[0015] Firstly, the device can effectively break the agglomerates in the rice bran through the stirring of the stirring blades in the upper cavity, and promote the flying of lighter dust and impurities; at this time, the fan uses its strong suction force to suck the dust and light impurities into the dust guide main pipe through the dust guide branch pipe and the anti-blocking net, and then send them into the water washing box for immersion treatment; this continuous process not only ensures the uniform stirring of the rice bran, but also realizes the efficient removal of dust and impurities, effectively reduces dust pollution, and improves the cleanliness of the working environment; at the same time, the design of the anti-blocking net avoids the blockage of the dust guide branch pipe by large particles or lumps, ensuring the stable operation of the dust collection system.

[0016] Secondly, the device can effectively break the agglomerates in the rice bran through the stirring of the stirring blades in the upper cavity, and promote the flying of lighter dust and impurities; at this time, the fan uses its strong suction force to suck the dust and light impurities into the dust guide main pipe through the dust guide branch pipe and the anti-blocking net, and then send them into the water washing box for immersion treatment; this continuous process not only ensures the uniform stirring of the rice bran, but also realizes the efficient removal of dust and impurities, effectively reduces dust pollution, and improves the cleanliness of the working environment; at the same time, the design of the anti-blocking net avoids the blockage of the dust guide branch pipe by large particles or lumps, ensuring the stable operation of the dust collection system. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is the internal structure schematic diagram of the recycling bin of the utility model;

[0018] Figure 2 is the internal structure schematic diagram of the recycling bin of the utility model;

[0019] Figure 3 is the three-dimensional structure schematic diagram of the utility model;

[0020] Figure 4 is the three-dimensional structure schematic diagram of the utility model;

[0021] Figure 5 is the front structure schematic diagram of the utility model;

[0022] In the figure: 1, recycling bin;2, mounting frame;3, screen;4, mounting shaft;5, rotating rod;6, stirring blade;7, servo motor;8, mounting block;9, electric push rod;10, flexible pad;11, first guide plate;12, second guide plate;13, fan;14, dust guide main pipe;15, dust guide branch pipe;16, water washing box;17, anti-blocking net;18, feeding port;19, bin cover;20, discharge port. DETAILED DESCRIPTION

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the description herein is for describing particular embodiments only and is not intended to be limiting of the application; the description and the drawings are to be regarded as illustrative in nature and are not intended to limit the application; the terminology used in the description and the claims of the present application and the above description of the drawings includes the terms specifically mentioned above as well as their derivatives.

[0024] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase "in an embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily all directed to the same embodiments, or alternative or alternative embodiments.

[0025] The utility model discloses a rice bran recycling device for rice processing, which comprises Figures 1-5As shown, including the recycling bin 1; provided in the recycling bin 1 mounting frame 2, the mounting frame 2 will be divided into the recycling bin 1 upper cavity and lower cavity; the mounting frame 2 is provided with a screen 3; wherein, the upper cavity is provided with a group of mounting shaft 4; two mounting shaft 4 in the rotating fit with the same rotating rod 5; the rotating rod 5 outside is provided with a plurality of stirring blades 6; provided in the recycling bin 1 one side of the outer wall of the servo motor 7, the output of the servo motor 7 and the end of the rotating rod 5 key fixed connection; the lower cavity adjacent mounting frame 2 one side of a group of mounting block 8; provided in two electric push rod 9; provided in two electric push rod 9 telescopic end of the flexible pad 10, the flexible pad 10 and screen 3 is opposite.

[0026] It should be noted that, due to the traditional rice bran recycling method in the key links such as stirring, screening, collection, there are obvious shortcomings, these problems not only seriously restrict the quality of rice bran and efficient utilization, but also increase the processing cost and environmental pollution risk problem, the first use of stirring blade 6 in the upper cavity of the rice bran is fully stirred, effectively broken agglomerates and promote the flying dust impurities; then, the fan 13 through the dust branch pipe 15 and the anti blocking net 17 will dust and light impurities efficient removal, sent into the water washing tank 16 for immersion treatment, this process not only ensures the uniform stirring of rice bran, but also significantly improves the cleanliness of the working environment, effectively reduces the dust pollution;

[0027] Subsequently, after stirring the rice bran naturally falls into the screen 3 in the lower cavity, the screen 3 accurately separates the rice bran from other heavier impurities; in order to further improve the screening effect, the device uses electric push rod 9 to push the flexible pad 10 to apply vibration pressure to the screen 3, so that the mixture is more closely contacted with the surface of the screen 3, thereby significantly improving the efficiency of screening; the first guide plate 11 and the second guide plate 12 arranged in the lower cavity effectively guide the rice bran particles after screening along the predetermined path, ensuring that the rice bran can be smoothly collected to the bottom of the collection area, avoiding the accumulation or blockage of rice bran in the lower cavity.

[0028] Specifically, in this embodiment, the present scheme mainly includes recycling bin 1; when working, the rice bran is first sent into the upper cavity of the recycling bin 1; in the upper cavity, a group of symmetrical mounting shafts 4 are designed, the two mounting shafts 4 jointly support and rotate with a rotating rod 5; the rotating rod 5 is uniformly distributed with a plurality of stirring blades 6 on the outside, when the servo motor 7 is started, the output end is connected by key fixation to drive the rotating rod 5 and the stirring blades 6 to rotate together; these rotating stirring blades 6 fully stir the mixture in the upper cavity, which not only helps to break up the larger agglomerates in the rice bran, but also promotes the lighter impurities in the mixture, such as dust, to fly up and be effectively adsorbed by the dust branch pipe 15 provided;

[0029] In order to provide the power required for stirring, the device is specially installed with a servo motor 7 on the outer wall of one side of the recovery bin 1; the precise control of the servo motor 7 ensures that the rotating rod 5 and the stirring blade 6 rotate at a proper speed and direction, realizing the high-efficiency stirring function;

[0030] After sufficient stirring, the rice bran falls naturally into the screen 3 in the lower cavity under the action of gravity; the screen 3 further effectively separates the rice bran from other heavier impurities; in order to improve the screening effect, a set of symmetrical mounting blocks 8 are arranged on the side adjacent to the mounting frame 2 of the lower cavity, and an electric push rod 9 is mounted on each mounting block 8; the extension ends of the two electric push rods 9 are respectively connected with a flexible pad 10 having elasticity, the flexible pads 10 are arranged opposite to the screen 3, and the electric push rod 9 pushes the flexible pad 10 to slowly approach the screen 3 and applies a certain vibration pressure; this pressure not only makes the mixture on the screen 3 more closely contact the surface of the screen 3, thereby improving the fineness and efficiency of screening; at the same time, due to the good elastic properties of the flexible pad 10, it can also buffer and disperse the pressure received by the screen 3 to a certain extent, effectively preventing the screen 3 from being damaged due to long-time excessive pressure;

[0031] Finally, the screened rice bran meeting the aperture falls into the bottom of the lower cavity for centralized collection through the mesh holes of the screen 3; in this way, the whole device realizes the effective recovery and utilization of the rice bran generated in the rice processing process, and provides strong support for the continuous and efficient operation of the rice processing.

[0032] As shown in the further preferred embodiment of the utility model, Figures 1-2 As shown, the inner wall of one side of the lower cavity is provided with a first guide plate 11 with downward distribution of inclination, and the opposite inner wall of the lower cavity is provided with a second guide plate 12 with downward distribution of inclination.

[0033] In this embodiment, the rice bran falls into the bottom of the lower cavity through the mesh holes of the screen 3, and the heavier impurities are intercepted by the screen 3; since the two guide plates are both inclined downward, they can effectively guide the screened rice bran particles to flow along the established path, ensuring that the rice bran can smoothly flow into the bottom collection area of the lower cavity; this design not only improves the collection efficiency of the rice bran, but also avoids the accumulation or blockage of the rice bran in the lower cavity.

[0034] As shown in the further preferred embodiment of the utility model, Figures 1-2 As shown, the first guide plate 11 is higher than the second guide plate 12 in the vertical direction.

[0035] In the embodiment, the first guide plate 11 guides the particles to flow down along the inclined surface thereof, and the particles are naturally moved to the lower second guide plate 12 due to the gravity; in this process, the flow path of the rice bran particles is effectively controlled, and the disorderly accumulation or blockage in the lower cavity is avoided; when the rice bran particles reach the second guide plate 12, they continue to flow down along the inclined surface of the guide plate to the bottom of the lower cavity; since the second guide plate 12 is lower in the vertical direction, it further ensures that the rice bran particles can smoothly flow into the collection area of the lower cavity.

[0036] As shown in the further preferred embodiment of the utility model, Figure 1 The outer side wall of the recycling bin 1 is provided with a fan 13, the suction end of the fan 13 is communicated with a dust guide main pipe 14, and the dust guide main pipe 14 is extended to the internal positions of the upper cavity and the lower cavity and is communicated with dust guide branch pipes 15.

[0037] In the embodiment, the rice bran is fully stirred in the upper cavity under the action of the stirring blade 6, and a certain amount of dust and light impurities may be generated in this process; at this time, the fan 13 is started, and the dust and light impurities in the upper cavity are sucked into the dust guide main pipe 14 through the dust guide branch pipes 15 by the strong suction force of the fan 13; after the impurities are sucked into the dust guide main pipe 14, they are uniformly collected or treated, so that the pollution of the device interior or the surrounding environment is avoided.

[0038] As shown in the further preferred embodiment of the utility model, Figure 3 The recycling bin 1 is provided with a water washing box 16 adjacent to the lower position of the fan 13, and the exhaust end of the fan 13 is communicated with the water washing box 16.

[0039] In the embodiment, the sucked dust and impurities subsequently enter the water washing box 16 through the exhaust end of the fan 13, and the water washing box 16 is provided with an appropriate amount of water; when the dust and impurities enter the water washing box 16, they are surrounded and infiltrated by the washing water, so that the generation of dust is reduced.

[0040] As shown in the further preferred embodiment of the utility model, Figure 2 One end of the dust guide branch pipe 15 located in the recycling bin 1 is provided with a blocking prevention net 17.

[0041] In the embodiment, only the dust and light impurities can smoothly pass through and enter the water washing box 16 for subsequent treatment through the filtering action of the blocking prevention net 17, and the larger particles or lumps are blocked on the blocking prevention net 17, so that the blockage risk of the dust guide branch pipe 15 by the larger particles or lumps is avoided.

[0042] As shown in the further preferred embodiment of the utility model, Figures 1-4As shown, the top of the recycling bin 1 is provided with a feeding port 18 communicated with the inner cavity thereof, and the feeding port 18 is hingedly fitted with a bin cover 19.

[0043] In the embodiment, the design of the feeding port 18 provided at the top of the recycling bin 1 and the bin cover 19 hingedly fitted thereon not only facilitates the operator to add the mixture into the recycling bin 1, but also effectively ensures the sealing and safety of the device during operation, thereby providing strong support for the efficient and stable operation of the whole rice bran recycling device.

[0044] In the further preferred embodiment of the utility model, as shown in the drawings, Figure 4 As shown, the lower part of the recycling bin 1 is provided with a discharge port 20 communicated with the inner cavity thereof.

[0045] In the embodiment, the design of the discharge port 20 provided at the lower part of the recycling bin 1 not only ensures that the rice bran after screening can be smoothly discharged, but also facilitates the subsequent collection and utilization.

[0046] Working principle: when the device is used, the rice bran is sent into the upper cavity of the recycling bin 1 through the feeding port 18 at the top of the recycling bin 1; the bin cover 19 hingedly fitted on the feeding port 18 ensures the sealing and safety during the adding process; in the upper cavity, a group of installation shafts 4 are designed, and the two installation shafts 4 jointly support and rotationally cooperate with a rotating rod 5; the rotating rod 5 is uniformly distributed with a plurality of stirring blades 6 on the outer side thereof; in order to provide the power required for stirring, a servo motor 7 is installed on the outer wall of one side of the recycling bin 1; the output end of the servo motor 7 is fixedly connected through a key to drive the rotating rod 5 and the stirring blades 6 to rotate together; the rotating stirring blades 6 fully stir the mixture in the upper cavity, which not only helps to stir the larger agglomerates in the rice bran, but also promotes the lighter dust and impurities in the mixture to fly up;

[0047] At this time, the fan 13 is started, and through the strong adsorption force thereof, the dust and light impurities in the upper cavity are sucked into the dust guide main pipe 14 through the dust guide branch pipe 15; the recycling bin 1 end of the dust guide branch pipe 15 is provided with a anti-blocking net 17, which effectively blocks the larger particles or lumps from entering the dust guide branch pipe 15, thereby avoiding the risk of blockage; the dust and impurities sucked in subsequently enter the water washing tank 16 through the exhaust end of the fan 13, and the water washing tank 16 is provided with an appropriate amount of water, so that when the dust and impurities enter the water washing tank 16, they will be surrounded and infiltrated by the washing water, thereby reducing the generation of dust;

[0048] The rice bran after sufficient stirring falls naturally into the screen 3 in the lower cavity under the action of gravity; the screen 3 further effectively separates the rice bran from other heavier impurities; in order to improve the screening effect, a group of symmetrical mounting blocks 8 are arranged on the side of the lower cavity adjacent to the mounting frame 2, and an electric push rod 9 is mounted on each mounting block 8; the telescopic ends of the two electric push rods 9 are respectively connected with a flexible pad 10 having elasticity, and the flexible pads 10 are arranged opposite to the screen 3; the electric push rod 9 pushes the flexible pad 10 to slowly approach the screen 3 and applies a certain vibration pressure, so that the mixture on the screen 3 is more closely contacted with the surface of the screen 3, and the fineness and efficiency of screening are improved; at the same time, the elastic property of the flexible pad 10 can also buffer and disperse the pressure received by the screen 3, so as to prevent the screen 3 from being damaged.

[0049] Finally, the screened rice bran meeting the aperture can smoothly fall through the mesh holes of the screen 3 into the bottom of the lower cavity for centralized collection; the inner wall of one side of the lower cavity is provided with a first guide plate 11 with a downward distribution of inclination, and the inner wall of the opposite side is provided with a second guide plate 12 with a downward distribution of inclination; the two guide plates effectively guide the screened rice bran particles to flow along the established path, so as to ensure that the rice bran can smoothly flow into the bottom collection area of the lower cavity; the first guide plate 11 guides the particles to flow downward along the inclined surface thereof, and the particles naturally move to the lower second guide plate 12 under the action of gravity; when the rice bran particles reach the second guide plate 12, they continue to flow downward along the inclined surface of the guide plate to the bottom of the lower cavity; this design not only improves the collection efficiency of the rice bran, but also avoids the accumulation or blockage of the rice bran in the lower cavity.

[0050] It should be noted that, for the foregoing embodiments, in order to simply describe, they are all expressed as a series of action combinations, but those skilled in the art should know that the present application is not limited by the described action sequence, because according to the present application, some steps can be performed in other sequences or simultaneously. Secondly, those skilled in the art should know that the embodiments described in the specification all belong to preferred embodiments, and the actions and modules involved are not necessarily necessary for the present application.

[0051] In several embodiments provided in the present application, it should be understood that the disclosed device can be implemented in other ways. For example, the device embodiments described above are only schematic; for example, the division of the above units can have another division manner in actual implementation, for example, a plurality of units or components can be combined or integrated into another system, or some features can be omitted or not executed. In addition, the coupling or communication connection between the shown or discussed mutually can be indirect coupling or communication connection through some interfaces, devices or units, which can be electrical or other forms.

[0052] The units described as separate components above can or can not be physically separate, and the components displayed as units can or can not be physical units, that is, can be located in one place, or can be distributed to multiple network units. Part or all of the units can be selected to achieve the purpose of the embodiment scheme according to actual needs.

[0053] The above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the protection scope of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments. Based on these embodiments, all other embodiments obtained by those skilled in the art without creative labor belong to the scope to be protected by the present application. Although the present application has been described in detail with reference to the above embodiments, those skilled in the art can still combine, add or delete or make other adjustments to the features in each embodiment of the present application according to the circumstances without creative labor, so as to obtain different other technical solutions which do not deviate from the concept of the present application in essence. These technical solutions also belong to the scope to be protected by the present application.

Claims

1. A rice bran recycling device for rice processing, characterized in that, Include: Recycling bin (1); The mounting frame (2) is arranged in the recycling bin (1), and the mounting frame (2) divides the recycling bin (1) into upper cavity and lower cavity; The mounting frame (2) is provided with a screen (3); Wherein, a group of mounting shafts (4) are symmetrically arranged in the upper cavity; The same rotating rod (5) is rotatably connected in the two mounting shafts (4); The rotating rod (5) is provided with a plurality of stirring blades (6) on the outside; The servo motor (7) is arranged on one side of the outer wall of the recycling bin (1), and the output end of the servo motor (7) is fixedly connected with the end of the rotating rod (5); The lower cavity is symmetrically provided with a group of mounting blocks (8) adjacent to one side of the mounting frame (2); The electric push rod (9) is arranged on the two mounting blocks (8); The flexible pad (10) is arranged on the telescopic end of the two electric push rods (9), and the flexible pad (10) is arranged opposite to the screen (3).

2. The rice bran recovery device for rice processing according to claim 1, wherein The first guide plate (11) with downward distribution of inclination is arranged on the inner wall of one side of the lower cavity, and the second guide plate (12) with downward distribution of inclination is arranged on the opposite inner wall of the lower cavity.

3. The rice bran recovery device for rice processing according to claim 2, wherein The first guide plate (11) is higher than the second guide plate (12) in the vertical direction.

4. The rice bran recovery device for rice processing according to claim 2, wherein The outer wall of the recycling bin (1) is provided with a fan (13), the suction end of the fan (13) is communicated with a dust guide main pipe (14), and the dust guide main pipe (14) extends to the inside of the upper cavity and the lower cavity and is communicated with a dust guide branch pipe (15).

5. The rice bran recovery device for rice processing according to claim 4, wherein The water washing box (16) is arranged at the lower position of the recycling bin (1) adjacent to the fan (13), and the exhaust end of the fan (13) is communicated with the water washing box (16).

6. The rice bran recovery device for rice processing according to claim 5, wherein The dust prevention net (17) is arranged at one end of the dust guide branch pipe (15) in the recycling bin (1).

7. The rice bran recovery device for rice processing according to claim 6, wherein The recycling bin (1) is provided with a feeding port (18) communicated with the inner cavity at the top position, and the recycling bin (1) is provided with a cover (19) hinged to the feeding port (18).

8. The rice bran recovery device for rice processing according to claim 7, wherein The recycling bin (1) is provided with a discharging port (20) communicated with the inner cavity at the lower position.