Extraction system for germs and aleurone layers

Abstract

The invention provides a germ and aleurone layer extracting system. The germ and aleurone layer extracting system comprises a first separating mechanism, a first screening mechanism, a second separating mechanism, a polishing machine and a second screening mechanism. The wall faces and rollers in the first separating mechanism and the second separating mechanism are vertically arranged, the rollers rotate along the axes of the rollers, the linear speeds of the wall faces and the working faces of the rollers are different, gravity force of the rice and the rice grains is matched to be downward, and disordered arrangement of the rice and the rice grains in the working chamber is changed into vertical arrangement with the long axis of the rice as the guide. The aleurone layer and the germs can be finally obtained through various treatments of grinding and separation of the extraction system. The device is simple in structural principle, and can separate the required aleurone layer from the germ layer by layer, so that the aleurone layer and the germ are accurately extracted.

Description

Technical Field

[0001] The present application relates to the field of rice deep processing, and in particular to a system for extracting germ and endosperm. Background Art

[0002] Rice is the staple food of human beings and the main source of nutrition for the basic energy and nutritional needs of the human body. Among them, the rice germ is the essence of rice. The aleurone layer is the innermost layer of the seed cortex of cereal crops, located between the seed coat and the endosperm, accounting for 7% to 9% of the total mass of the seed. The physiologically active ingredients with high nutritional value in cereal crops (such as dietary fiber, minerals, beneficial lipids, vitamins, phenolic acids and lignans, etc.) are concentrated in the aleurone layer. Its 20% pure aleurone layer is equivalent to the nutrition of the whole grain. According to the current domestic rice production standards, the germ and aleurone layer are basically removed in the multi-pass grinding, polishing and screening process. The germ and aleurone layer mixed in the rice bran can only become by-products and be discarded.

[0003] Application Contents

[0004] Therefore, in order to overcome the above-mentioned shortcomings of the prior art, the present application designs a germ and aleurone extraction system to solve the problem of accurate extraction of aleurone and germ.

[0005] In order to achieve the above-mentioned purpose, the present application provides the following technical solution: a germ and aleurone extraction system, characterized in that it comprises:

[0006] The first separation mechanism is used to grind the rice to obtain the rice cortex and rice grains;

[0007] A first screening mechanism is used to separate the rice cortex and rice grains;

[0008] A second separation mechanism is used to grind the rice grains to obtain aleurone, germ and polished rice;

[0009] A polishing machine, used for polishing the aleurone layer, germ and polished rice;

[0010] A second screening mechanism is used to separate the aleurone layer, germ and polished rice;

[0011] Among them, the first separation mechanism and the second separation mechanism are rice milling machines, which include vertically arranged walls and rollers, on which grinding particles are fastened, and the size of the grinding particles in the first separation mechanism is larger than that in the second separation mechanism; the roller rotates around a vertical axis, and the wall and the roller surround a grinding studio; the rice grains flow in opposite directions in the grinding studio along the direction of rotation of the roller, and while flowing, the rice grains rotate in opposite directions along the direction of rotation of the roller with their own long axis as the axis.

[0012] Specifically, the size of the ground particles fastened on the roller is larger than the size of the ground particles on the wall surface.

[0013] Specifically, the first separation mechanism and the second separation mechanism respectively include a plurality of rice milling machines, and the size of the milled particles in the plurality of rice milling machines in the first separation mechanism is smaller than the size of the milled particles in the plurality of rice milling machines in the second separation mechanism.

[0014] Specifically, the lateral distance of the working chamber is 2 to 4 times the short axis distance of the rice grains.

[0015] Specifically, the first screening mechanism includes a 9-11 mesh vibrating screen. After the 9-11 mesh vibrating screen is vibrated, the screened material of the 9-11 mesh vibrating screen is the rice grains, and the screened material of the 9-11 mesh vibrating screen is the rice cortex.

[0016] Specifically, the second screening mechanism includes a 12-18 mesh vibrating screen and a 23-25 ​​mesh vibrating screen, the 12-18 mesh vibrating screen is used to separate the endosperm, the germ and the polished rice, and after the 12-18 mesh vibrating screen is vibrated, the screened material of the 12-18 mesh vibrating screen is the polished rice, and the screened material of the 12-18 mesh vibrating screen is the endosperm and the germ; the 23-25 ​​mesh vibrating screen is used to separate the endosperm and the germ, and after the 23-25 ​​mesh vibrating screen is vibrated, the screened material of the 23-25 ​​mesh vibrating screen is the germ, and the screened material of the 23-25 ​​mesh vibrating screen is the endosperm.

[0017] Specifically, the extraction system further comprises a germ processing mechanism for performing fine screening, color sorting and microwave ripening treatment on the germs separated by the second screening mechanism, and the finished germ product is obtained by the germ processing mechanism.

[0018] Specifically, the extraction system further comprises an endosperm processing mechanism for performing microwave cooking, grinding and fine screening on the endosperm separated by the second screening mechanism, and the endosperm processing mechanism processes the endosperm to obtain a finished product.

[0019] Specifically, the extraction system further comprises a clean packaging mechanism for respectively performing clean packaging on the finished product of the germ and the finished product of the endosperm.

[0020] Compared with the prior art, the advantages of the present application are as follows: the present application designs a germ and aleurone layer extraction system, wherein the rice grains sequentially pass through the first separation mechanism, the first screening mechanism, the second separation mechanism, the polishing machine and the second screening mechanism in the extraction system, and finally obtain the germ and aleurone layer, wherein the first separation mechanism and the second separation mechanism include several rice mills, the wall surface and the roller in the rice mill are vertically arranged, the roller rotates along its own axis, so that the linear speed of the wall surface and the roller working surface are different, and the gravity force of the rice grains and the rice grains is downward, and the rice grains and the rice grains in the working chamber are changed from disordered arrangement to vertical arrangement guided by the long axis of the rice grains, the first separation mechanism sequentially twists the rice grains vertically arranged in the working chamber, and obtains the rice cortex and the rice grains, and the rice grains are always vertically arranged in the working chamber, and the first separation mechanism only processes the rice cortex, and does not peel off the germ and aleurone layer of the rice grains. The second separation mechanism grinds the rice grains vertically arranged in the working chamber, and accurately grinds to obtain the aleurone layer and the germ. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 is a simplified structural diagram of a rice mill in an embodiment of the present application;

[0023] Figure 2 It is a flow chart of the extraction of germ and aleurone layer in the embodiments of the present application. DETAILED DESCRIPTION

[0024] The embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0025] The following describes the implementation methods of the present application through specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The present application can also be implemented or applied through other different specific implementation methods, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that, in the absence of conflict, the following embodiments and the features in the embodiments can be combined with each other. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work belong to the scope of protection of the present application.

[0026] It should be noted that various aspects of the embodiments within the scope of protection of the present application are described below. It should be apparent that the aspects described herein can be embodied in a wide variety of forms, and any specific structure and / or function described herein is merely illustrative. Based on the present application, it should be understood by those skilled in the art that an aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspect described herein can be used to implement the device and / or practice the method. In addition, other structures and / or functionalities other than one or more of the aspects described herein can be used to implement this device and / or practice this method.

[0027] It should also be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present application. The drawings only show components related to the present application rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0028] Additionally, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, it will be understood by those skilled in the art that the aspects described may be practiced without these specific details.

[0029] An embodiment of the present application provides a germ and endosperm extraction system, comprising a first separation mechanism, a first screening mechanism, a second separation mechanism, a polisher, and a second screening mechanism.

[0030] The first separation mechanism and the second separation mechanism are both rice milling machines 10, such as Figure 1 As shown, the rice milling machine 10 includes a vertically arranged wall 101 and a roller 102, the wall 101 and the roller 102 surround a grinding studio 103, the wall 101 and the roller 102 are fastened with grinding particles, the wall 101 fastened with grinding particles serves as a secondary grinding surface 1031 of the grinding studio 103, and the roller 102 fastened with grinding particles serves as a primary grinding surface 1032 of the grinding studio 103. The wall 101 is fixed, and the roller 102 rotates around a vertical axis 1021.

[0031] The first screening mechanism and the second screening mechanism are composed of vibrating screens with different mesh sizes. The vibrating screen divides the bulk material groups of different particle sizes into several different levels through a single or multi-layer screen surface with uniform holes for many times, which is called screening. Particles larger than the screen holes remain on the screen surface, which are called the screen-over material of the screen surface, and particles smaller than the screen holes pass through the screen holes, which are called the screen-under material of the screen surface. The actual screening process is: after a large amount of bulk materials of different particle sizes and mixed coarse and fine particles enter the screen surface, only a part of the particles are in contact with the screen surface. Due to the vibration of the screen box, the material layer on the screen is loosened, so that the gaps that already exist in the large particles are further expanded, and the small particles take the opportunity to pass through the gaps and transfer to the lower layer or the conveyor. Since the gaps between small particles are small, large particles cannot pass through, so the originally disorderly arranged particle groups are separated, that is, they are layered according to the particle size, forming an arrangement rule of small particles at the bottom and coarse particles at the top. The fine particles that reach the screen surface are smaller than the screen holes and pass through the screen, and finally the coarse and fine particles are separated, completing the screening process.

[0032] The polishing machine is used to polish the rice grains, rub and wipe the rice grains, and further peel the endosperm and germ from the polished rice.

[0033] The rice grains include the rice cortex and the rice grains, wherein the rice grains include the endosperm, the germ and the polished rice; the rice grains enter the extraction system of the germ and the endosperm, and the rice grains pass through the first separation mechanism, the first screening mechanism, the second separation mechanism, the polishing machine and the second screening mechanism in the extraction system in sequence; first, the first separation mechanism grinds the rice grains, and the rice grains enter the grinding chamber of the rice mill, and the rollers rotate around the vertical axis, and the linear speeds of the wall surface and the working surface of the rollers surrounding the grinding chamber are different, and the rice grains flow in the grinding chamber in the opposite directions along the direction of the rollers rotating in the downward direction in coordination with the gravity force of the rice grains, and while flowing, the rice grains also rotate in the opposite directions along the direction of the rollers rotating in the direction of the rollers rotating with their own long axis as the axis, and the rollers and the walls fully grind the rice grains and separate the rice grains and the rice cortex; the rice grains and the rice cortex enter the first screening mechanism again, and the first screening mechanism separates the rice grains and the rice cortex, and the screened material is the rice grains, and the screened material is the rice cortex. The rice grains on the screen are then put into the second separation mechanism, and the rice grains enter the milling chamber of the rice milling machine. The rice milling machine in the second separation mechanism moves in the same way, and the rice grains also flow in opposite directions along the rotation direction of the roller in the milling chamber. While flowing, the rice grains also rotate in opposite directions along the rotation direction of the roller with their own long axis as the axis. The roller and the wall surface fully grind the rice grains to separate polished rice, aleurone layer and germ. The polished rice, aleurone layer and germ enter the polishing machine, and the polishing machine polishes the aleurone layer, germ and polished rice. The polished aleurone layer, germ and polished rice enter the second screening mechanism. The first screening of the second screening mechanism separates the polished rice from the aleurone layer and germ. The on-screen material is the polished rice, and the under-screen material is the aleurone layer and germ. The second screening of the second screening mechanism separates and screens the under-screen aleurone layer and germ. The on-screen material is the germ, and the under-screen material is the aleurone layer.

[0034] The present application designs a germ and aleurone extraction system, wherein the rice grains sequentially pass through the first separation mechanism, the first screening mechanism, the second separation mechanism, the polisher and the second screening mechanism in the extraction system, and finally obtain the germ and aleurone layer, wherein the first separation mechanism and the second separation mechanism include several rice mills, wherein the wall surface and the roller are vertically arranged, and the roller rotates along its own axis, so that the linear speeds of the wall surface and the roller working surface are different, and the rice grains and the rice grains are changed from disorderly arrangement to vertical arrangement guided by the long axis of the rice grains in the working chamber with the gravity force of the rice grains and the rice grains downward, and the first separation mechanism sequentially twists the rice grains vertically arranged in the working chamber to obtain the rice cortex and the rice grains, and the rice grains are always vertically arranged in the working chamber, and the first separation mechanism only processes the rice cortex, and does not peel off the germ and aleurone layer of the rice grains. The second separation mechanism grinds the rice grains vertically arranged in the working chamber to accurately obtain the aleurone layer and the germ.

[0035] In one embodiment, the size of the grinding particles fastened on the roller is larger than the size of the grinding particles on the wall surface. The roller fastened with the grinding particles serves as the main grinding surface for grinding, and the wall fastened with the grinding particles serves as the secondary grinding surface for grinding, and the friction coefficient of the main grinding surface is larger than the friction coefficient of the secondary grinding surface. During the grinding process, the rice grains or rice particles flow in opposite directions along the direction of rotation of the roller in the grinding chamber, and while flowing, the rice grains or rice particles rotate in opposite directions along the direction of rotation of the roller with their own long axis as the axis, that is, the rice grains or rice particles spirally descend in the grinding chamber; no matter where the rice grains or rice particles are in the spiral descent process, they can be subjected to the grinding treatment of the main grinding surface or the secondary grinding surface, and the mutual friction between the rice grains or rice particles can also play a role in the grinding treatment.

[0036] In one embodiment, the first separation mechanism and the second separation mechanism respectively include a plurality of rice milling machines, and the size of the milled particles in the plurality of rice milling machines in the first separation mechanism is smaller than the size of the milled particles in the plurality of rice milling machines in the second separation mechanism. The rice grains and rice grains of different processing objects are processed respectively to ensure that the milled particles do not damage the various layer structures of the rice grains.

[0037] In one embodiment, the lateral distance of the grinding studio is 2 to 4 times the short axis distance of the rice grains, which limits the granular rice grains to be arranged vertically along the long axis direction, and keeps them spinning along the long axis and rubbing against each other during the spiral descent, thereby achieving more targeted and efficient grinding.

[0038] In one embodiment, the first screening mechanism includes a 9-11 mesh vibrating screen, which screens the rice cortex and rice grains separated by the first separation mechanism. After the 9-11 mesh vibrating screen completes vibration, the material on the sieve of the 9-11 mesh vibrating screen is the rice grains, and the material under the sieve of the 9-11 mesh vibrating screen is the rice cortex.

[0039] In one embodiment, the second screening mechanism includes a 12-18 mesh vibrating screen and a 23-25 ​​mesh vibrating screen. The 12-18 mesh vibrating screen is used to separate the endosperm, the germ and the polished rice. After the 12-18 mesh vibrating screen is vibrated, the screened material of the 12-18 mesh vibrating screen is the polished rice, and the screened material of the 12-18 mesh vibrating screen is the endosperm and the germ; the 23-25 ​​mesh vibrating screen is used to separate the endosperm and the germ. After the 23-25 ​​mesh vibrating screen is vibrated, the screened material of the 23-25 ​​mesh vibrating screen is the germ, and the screened material of the 23-25 ​​mesh vibrating screen is the endosperm.

[0040] In one embodiment, the germ and endosperm extraction system further comprises a germ processing mechanism, which comprises a germ fine screening unit, a color sorting unit and a microwave ripening unit, which are respectively used to perform fine screening, color sorting and microwave ripening treatment on the germ separated by the second screening mechanism, so as to obtain a finished germ product. The germ fine screening unit is used to separate the germ and the impurities contained therein; the color sorting unit is used to perform color sorting on the germ and remove impurities from the germ; and the microwave ripening unit is used to sterilize, ripen and preserve the germ.

[0041] In one embodiment, the germ and endosperm extraction system also includes an endosperm processing mechanism, including a microwave cooking unit, a grinding unit, and an endosperm fine screening unit; the endosperm obtained by the screening mechanism is sequentially processed by the microwave cooking unit, the grinding unit, and the endosperm fine screening unit to obtain an endosperm finished product; the microwave cooking unit is used to sterilize, cook and preserve the endosperm; the grinding unit is used to grind the endosperm; the endosperm fine screening unit is used to screen and separate the endosperm, and the screened material of the endosperm fine screening unit is the end product of the endosperm.

[0042] In one embodiment, the extraction system further comprises a clean packaging mechanism for separately cleanly packaging the finished product of the germ and the finished product of the endosperm.

[0043] Embodiment 1

[0044] like Figure 2 As shown, rice is put into the first separation mechanism 21, which includes 4 rice mills. The rice enters the grinding working chambers of the 4 rice mills in turn. The lateral distance of the grinding working chamber is 3 times the short axis distance of the rice, which limits the vertical arrangement of the granular rice along the long axis direction. During the spiral descent, the rice grains are kept spinning along the long axis and rub against each other, so as to achieve more targeted and efficient grinding. The 4 rice mills all include rollers and walls for fastening the grinding particles. The rollers fastened with the grinding particles serve as the main grinding surface for the grinding work, and the walls fastened with the grinding particles serve as the auxiliary grinding surface for the grinding work. The friction coefficient of the main grinding surface is greater than the friction coefficient of the auxiliary grinding surface. The size of the milled particles of the four rice mills is 30 mm. The rollers rotate around the vertical axis, and the wall surface remains stationary. The wall surface and the working surface of the roller surrounding the milling room have different linear velocities. With the downward force of the center of gravity of the rice, the rice flows in different directions in the milling room along the direction of the roller rotation. While flowing, the rice also rotates in different directions along the direction of the roller rotation with its own long axis as the axis, that is, the rice or rice grains descend in a spiral manner in the milling room; any layer of the rice in the spiral descent process can be milled by the main grinding surface or the auxiliary grinding surface, and the friction between the rice particles can also play a role in milling. Finally, the first separation mechanism 21 separates the rice into rice grains and rice cortex.

[0045] The rice grains and the cortex of rice then enter the first screening mechanism 22, which is a 10-mesh vibrating screen. The 10-mesh vibrating screen separates the rice grains and the cortex of rice separated by the first separation mechanism 21. After the 10-mesh vibrating screen completes vibration, the material on the screen is the rice grains, and the material under the screen is the cortex of rice.

[0046] The rice grains on the sieve are then put into the second separation mechanism 23, which includes 4 rice mills. The rice grains enter the grinding working rooms of the 4 rice mills in turn. The lateral distance of the grinding working room is 3 times the short axis distance of the rice grains, which limits the granular rice grains to be arranged vertically along the long axis direction. During the spiral descent, they keep spinning along the long axis and rub against each other, so as to achieve more targeted and efficient grinding. The 4 rice mills all include rollers and walls for fastening the grinding grains. The rollers fastened with the grinding grains serve as the main grinding surface for grinding, and the walls fastened with the grinding grains serve as the secondary grinding surface for grinding. The friction coefficient of the main grinding surface is greater than the friction coefficient of the secondary grinding surface. The size of the milled particles of the four rice mills is 35 mm. The rollers rotate around the vertical axis, and the wall surface remains stationary. The wall surface and the working surface of the roller surrounding the milling room have different linear velocities. With the downward force of the center of gravity of the rice, the rice flows in the milling room in the direction of the roller rotation in different directions. While flowing, the rice grains also rotate in different directions along the direction of the roller rotation with their own long axes as the axis, that is, the rice grains descend in a spiral manner in the milling room; no matter where the rice grains are in the spiral descent process, they can be milled by the main grinding surface or the auxiliary grinding surface, and the mutual friction between the rice grains can also play a role in milling. Finally, the second separation mechanism 23 separates the rice grains into aleurone, germ and polished rice.

[0047] The polished rice, endosperm and germ are then put into the polishing machine 24, which polishes the endosperm, germ and polished rice. The polishing machine 24 rubs and wipes the rice grains to further peel the endosperm and germ from the polished rice.

[0048] The polished aleurone layer, germ and polished rice enter the second screening mechanism 25, which includes a 12-18 mesh vibrating screen and a 24 mesh vibrating screen. First, the 12-18 mesh vibrating screen of the second screening mechanism 25 performs the first screening to separate the polished rice from the aleurone layer and the germ. The screened material is the polished rice, and the screened material is the aleurone layer and the germ. Then, the 24 mesh vibrating screen of the second screening mechanism 25 performs the second screening to separate and screen the screened aleurone layer and the germ. The screened material is the germ, and the screened material is the aleurone layer.

[0049] The germ processing mechanism 26 then processes the germs on the 24-mesh vibrating screen. The germs pass through a germ essence screening unit, a color sorting unit and a microwave ripening unit in sequence. The germ essence screening unit is used to separate the germs and impurities contained therein; the color sorting unit is used to color sort the germs and remove impurities from the germs; the microwave ripening unit is used to sterilize, ripen and preserve the germs; and finally a finished germ product is obtained.

[0050] The endospere layer processing mechanism 27 processes the endospere layer of the 24-mesh vibrating screen underscreen, and the endospere layer passes through a ripening unit, a grinding unit, and an endospere layer fine screening unit in sequence. The microwave ripening unit is used to sterilize, ripen and preserve the endospere layer; the grinding unit is used to grind the endospere layer; the endospere layer fine screening unit is used to screen and separate the endospere layer, and the underscreen of the endospere layer fine screening unit is the finished product of the endospere layer.

[0051] Finally, the clean packaging mechanism 28 performs clean packaging on the finished germ product and the finished end of the endosperm respectively.

[0052] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by any technician familiar with the technical field within the technical scope disclosed in the present application should be included in the protection scope of the present application.

Claims

1. A germ and aleurone extraction system, characterized in that: include: The first separation mechanism is used to grind the rice to obtain the rice cortex and rice grains; A first screening mechanism is used to separate the rice cortex and rice grains; A second separation mechanism is used to grind the rice grains to obtain aleurone, germ and polished rice; A polishing machine, used for polishing the aleurone layer, germ and polished rice; A second screening mechanism is used to separate the aleurone layer, germ and polished rice; Among them, the first separation mechanism and the second separation mechanism are rice milling machines, which include vertically arranged walls and rollers, on which grinding particles are fastened, and the size of the grinding particles in the first separation mechanism is larger than that in the second separation mechanism; the roller rotates around a vertical axis, and the wall and the roller surround a grinding studio; the rice grains flow in opposite directions in the grinding studio along the direction of rotation of the roller, and while flowing, the rice grains rotate in opposite directions along the direction of rotation of the roller with their own long axis as the axis.

2. The extraction system according to claim 1, characterized in that The size of the ground particles fastened on the roller is larger than the size of the ground particles on the wall surface.

3. The extraction system according to claim 1, characterized in that The first separation mechanism and the second separation mechanism respectively include a plurality of rice milling machines, and the size of the milled particles in the plurality of rice milling machines in the first separation mechanism is smaller than the size of the milled particles in the plurality of rice milling machines in the second separation mechanism.

4. The extraction system according to claim 1, characterized in that The lateral distance of the grinding working chamber is 2 to 4 times of the short axis distance of the rice.

5. The extraction system according to claim 1, characterized in that The first screening mechanism comprises a 9-11 mesh vibrating screen. After the 9-11 mesh vibrating screen is vibrated, the screened material of the 9-11 mesh vibrating screen is the rice grains, and the screened material of the 9-11 mesh vibrating screen is the rice cortex.

6. The extraction system according to claim 1, characterized in that The second screening mechanism includes a 12-18 mesh vibrating screen and a 23-25 ​​mesh vibrating screen. The 12-18 mesh vibrating screen is used to separate the endosperm, the germ and the polished rice. After the 12-18 mesh vibrating screen is vibrated, the screened material of the 12-18 mesh vibrating screen is the polished rice, and the screened material of the 12-18 mesh vibrating screen is the endosperm and the germ; the 23-25 ​​mesh vibrating screen is used to separate the endosperm and the germ. After the 23-25 ​​mesh vibrating screen is vibrated, the screened material of the 23-25 ​​mesh vibrating screen is the germ, and the screened material of the 23-25 ​​mesh vibrating screen is the endosperm.

7. The extraction system according to claim 1, characterized in that The extraction system further comprises a germ processing mechanism, which is used to perform fine screening, color sorting and microwave ripening treatment on the germs separated by the second screening mechanism, and the finished germ product is obtained by the germ processing mechanism.

8. The extraction system according to claim 1, characterized in that The extraction system further comprises an aleurone layer processing mechanism, which is used for performing microwave cooking, grinding and fine screening on the aleurone layer separated by the second screening mechanism, and the aleurone layer processing mechanism processes the aleurone layer to obtain a finished product.

9. The extraction system according to claims 7 to 8, characterized in that: The extraction system further comprises a clean packaging mechanism, which is used for respectively performing clean packaging on the finished product of the germ and the finished product of the endosperm.

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