Corn degerming post-treatment winnowing device
By designing a closed-loop feeder and a flow guiding component, efficient separation of corn endosperm and corn buds is achieved, solving the problem of low efficiency in existing circulating air separators and improving the purity and air separation efficiency of corn endosperm.
Patent Information
- Application Number
- CN202423052074.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-11
- Publication Date
- 2025-11-21
- Estimated Expiration
- 2034-12-11
AI Technical Summary
In existing corn processing equipment, circulating air separators are difficult to obtain high-purity endosperm in a single air separation, and their efficiency is low, requiring multiple air separations to ensure product quality.
A closed-loop feeder continuously feeds the mixture into the air box. The corn endosperm and corn husk are separated by a flow guide component and a closed-loop discharge device. The design of the flow guide component allows the heavier endosperm to fall into the discharge box, while the lighter corn husk is guided by the air force to be discharged by the closed-loop discharge device, forming a state of lateral blowing of the mixture and improving the air separation efficiency.
It improves the purity of corn endosperm and the efficiency of air separation extraction, reduces the need for multiple air separations, and improves the effect of a single air separation.
Smart Images
Figure CN223571322U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to corn deep processing technical field, concretely relates to a corn degermination post -treatment winnowing device. BACKGROUND
[0002] Corn is a very important food crop, and has great potential in the field of deep processing. For example, corn endosperm can be used to process starch and alcohol, corn germ can be used to process corn germ oil, and corn cortex can be used to process various fiber products and feed. The key process of corn deep processing is to separate the corn germ and cortex from the endosperm. The separation of corn endosperm and germ directly affects the quality of deep processing products.
[0003] At present, corn processing equipment breaks and peels corn to obtain a mixture of endosperm, germ and cortex, and then separates pure endosperm from the mixture by using the different specific gravity of the components in the wind selection device. The commonly used wind selection device at present is mostly a circulating wind selector, which uses a fan to form a circulating airflow in the wind box. The mixture is blown by the airflow, and the endosperm with larger specific gravity falls downward, while the germ and cortex with smaller specific gravity rise with the airflow and are finally blown out of the wind box. The disadvantage of this wind selection method is that the circulating airflow cannot be too strong, otherwise it will cause the endosperm to flow backward. However, a smaller airflow cannot obtain high-purity endosperm through one-time wind selection, so the material often needs to be repeatedly wind selected several times to ensure the purity of the endosperm, thus the efficiency is low. SUMMARY
[0004] The utility model embodiment provides a kind of corn degermination post -treatment winnowing device, to improve the endosperm wind selection extraction efficiency and purity of corn degermination.
[0005] To achieve the above object, the utility model adopts the technical scheme of providing a kind of corn degermination post -treatment winnowing device, including wind box, closed wind feeder and closed wind discharger;Closed wind feeder is located at the top wall of one end of wind box, for continuously feeding the mixture of corn endosperm and corn bud skin into wind box;Closed wind discharger is located at the bottom wall of the other end of wind box;The bottom wall of wind box is provided with a drop box directly below closed wind feeder;The side wall of one end of wind box close to drop box is provided with air inlet channel, and air inlet channel is used to blow wind into wind box;The top wall of wind box is provided with air outlet pipe directly above closed wind discharger;Wherein, wind box is provided with flow guide assembly, and flow guide assembly is used to guide the wind blown into wind box to air outlet pipe, and is also used to guide corn endosperm and corn bud skin separated under the action of wind force and gravity difference to drop box and closed wind discharger respectively.
[0006] In a possible implementation, the flow guide assembly comprises a first flow guide plate, a second flow guide plate and a third flow guide plate arranged in the wind box; the first flow guide plate is connected to the side wall of the wind box away from the air inlet channel; the second flow guide plate is connected to the air inlet of the air-tight discharger; and the third flow guide plate is arranged on the side of the air outlet tube close to the air inlet channel; wherein the first flow guide plate and the second flow guide plate are both inclined from bottom to top and connected, and the connection position of the first flow guide plate and the second flow guide plate is higher than the air inlet channel; and the third flow guide plate is gradually inclined away from the air inlet channel from top to bottom, and is used for blocking the corn husks towards the air-tight discharger.
[0007] In some embodiments, a baffle plate is slidably connected in the wind box, and the baffle plate is located between the first flow guide plate and the second flow guide plate, and the top end of the baffle plate is higher than the connection position of the first flow guide plate and the second flow guide plate.
[0008] For example, the wind box further comprises a fourth flow guide plate and a fifth flow guide plate arranged below the air-tight feeder, the fourth flow guide plate is used for guiding the mixed material to slide towards the fifth flow guide plate, and the fifth flow guide plate is used for guiding the mixed material to slide towards the first flow guide plate.
[0009] For example, the air-tight feeder comprises a feeding box connected to the top wall of the wind box and in communication with the wind box, a feeding roller rotatably connected in the feeding box, and an air-tight assembly arranged in the feeding box and connected to the feeding roller, the air-tight assembly is used for closing the gap between the feeding roller and the inner wall of the feeding box.
[0010] In a possible implementation, the air-tight assembly comprises a first air-tight plate and a second air-tight plate arranged on two opposite inner walls of the wind box, and the first air-tight plate and the second air-tight plate are both inclined downward and in contact with the peripheral wall of the feeding roller.
[0011] In some embodiments, the peripheral wall of the feeding roller is spaced apart with a plurality of feeding grooves, the outer wall of the feeding box is connected with a rotary driving member, and the output end of the rotary driving member is coaxially connected with the feeding roller.
[0012] For example, the air-tight discharger comprises a discharging auger horizontally connected to the bottom wall of the wind box and a self-weight sealing door connected to the discharging end of the discharging auger.
[0013] For example, the discharging auger comprises a spiral conveying section and a hollow section, the spiral conveying section is in communication with the wind box, and the end of the hollow section is provided with the self-weight sealing door.
[0014] In some embodiments, the end of the hollow section away from the spiral conveying section forms an oblique notch, the self-weight sealing door is hinged to the upper edge of the oblique notch, and the self-weight sealing door is provided with a counterweight plate.
[0015] The corn embryo removal post-processing air separation device has the advantages that compared with the prior art, the corn embryo removal post-processing air separation device adopts the closed air feeding device to continuously feed the mixture of corn endosperm and corn bran into the air bellow, and simultaneously utilizes the closed air discharging device to discharge the corn bran separated from the mixture under the action of wind from the air bellow, so that the self-air inlet channel in the air bellow can form the air flow flowing to the air outlet pipe under the guidance of the flow guide assembly, the air inlet channel is located on the side wall of the air bellow, and the mixture falls into the discharging box from the closed air feeding device under gravity, so that the state of the mixture being blown from the side can be formed, the corn bran with smaller specific gravity deviates from the corn endosperm with larger specific gravity in the mixture, so that the corn endosperm continues to fall into the discharging box for discharge, and the corn bran falls into the closed air discharging device under the guidance of the flow guide assembly, compared with the mode of the circulating air flow blowing the mixture, the corn bran is more suitable to be blown away from the corn endosperm by using larger wind power, the purity of the corn endosperm extracted by single air separation can be improved, and the air separation extraction efficiency of the corn endosperm is improved. BRIEF DESCRIPTION OF DRAWINGS
[0016] Figure 1 A three-dimensional structure schematic view of the corn embryo removal post-processing air separation device is provided for the embodiment of the utility model.
[0017] Figure 2 An internal structure schematic view of the corn embryo removal post-processing air separation device is provided for the embodiment of the utility model.
[0018] Figure 3 A three-dimensional structure schematic view of the feeding roller is provided for the embodiment of the utility model.
[0019] In the drawing: 10, air bellow; 20, closed air feeding device; 21, feeding box; 22, feeding roller; 221, feeding groove; 222, rotary driving part; 23, closed air assembly; 231, first closed air plate; 232, second closed air plate; 30, closed air discharging device; 31, discharging auger; 311, spiral conveying section; 312, hollow section; 32, self-gravity sealing door; 321, counterweight plate; 40, discharging box; 50, air inlet channel; 60, air outlet pipe; 71, first flow guide plate; 72, second flow guide plate; 73, third flow guide plate; 74, fourth flow guide plate; 75, fifth flow guide plate; 76, material blocking plate. DETAILED DESCRIPTION
[0020] In order to make the technical problems, technical schemes and beneficial effects of the utility model clearer and more apparent, the utility model is further described in detail below by combining with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model, and are not used to limit the utility model.
[0021] It should be noted that when an element is referred to as being "set on", "connected to" another element, it can be directly on the other element or indirectly on the other element. It should be understood that the terms "on", "under", "front", "back", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. The terms "first", "second" and the like are only for the purpose of description and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the present application, the meaning of "a plurality of", "several" is two or more, unless otherwise explicitly specified.
[0022] Please refer to Figures 1 to 3 The corn germ removal post-processing air separation device provided by the present application is described below. The corn germ removal post-processing air separation device comprises a wind box 10, a closed air feeder 20 and a closed air discharger 30. The closed air feeder 20 is arranged on the top wall of one end of the wind box 10 and is used for continuously feeding the mixture of corn endosperm and corn bud skin into the wind box 10. The closed air discharger 30 is arranged on the bottom wall of the other end of the wind box 10. A discharging box 40 is arranged on the bottom wall of the wind box 10 directly below the closed air feeder 20. An air inlet channel 50 is arranged on the side wall of one end of the wind box 10 close to the discharging box 40, and the air inlet channel 50 is used for blowing air into the wind box 10. An air outlet pipe 60 is arranged on the top wall of the wind box 10 directly above the closed air discharger 30. The wind box 10 is provided with a flow guide assembly, which is used for guiding the air blown into the wind box 10 to the air outlet pipe 60 and is also used for guiding the corn endosperm and corn bud skin separated by the air force and the gravity difference to the discharging box 40 and the closed air discharger 30 respectively.
[0023] It should be noted that the corn bud skin can be understood as a mixture or adhesion of corn germ and cortex. When the corn cortex is separated from the corn endosperm, the germ at the tip of the corn is not completely separated from the cortex, which is referred to as corn bud skin.
[0024] It should be understood that the role of the flow guide assembly in the embodiment is to guide the wind direction and the direction of the corn endosperm and corn bran. Specifically, the wind of the air inlet channel 50 blows towards the flow guide assembly, and the mixed material falling from the closed feeding device 20 falls on the flow guide assembly. Under the action of the wind, the corn endosperm in the mixed material falls into the discharge box 40 due to its large specific gravity, and the corn bran, due to its small specific gravity, floats away from the area of the air inlet channel 50 in the wind box 10 under the action of the wind and finally falls into the closed discharge device 30. The flow guide assembly can increase the air inlet amount and air inlet flow rate of the air inlet channel 50, thereby ensuring that the corn bran is blown away from the corn endosperm and improving the air separation efficiency and the purity of the extracted corn endosperm.
[0025] Compared with the prior art, the corn endosperm and corn bran mixed material is continuously fed into the wind box 10 by the closed feeding device 20, and the corn bran separated from the mixed material under the action of the wind is discharged from the wind box 10 by the closed discharge device 30, so that the air flow in the wind box 10 flows from the air inlet channel 50 to the air outlet pipe 60 under the guidance of the flow guide assembly. Since the air inlet channel 50 is located on the side wall of the wind box 10, and the mixed material falls into the discharge box 40 by gravity from the closed feeding device 20, a state of blowing the mixed material laterally is formed, so that the corn bran with small specific gravity deviates from the corn endosperm with large specific gravity, thereby making the corn endosperm continue to fall into the discharge box 40 and the corn bran fall into the closed discharge device 30 under the guidance of the flow guide assembly. Compared with the way of blowing the mixed material against the circulating air flow, the corn bran can be blown away from the corn endosperm by using larger wind force, the purity of the extracted corn endosperm in a single air separation can be improved, and the air separation efficiency of the corn endosperm can be improved.
[0026] In some embodiments, referring to Figure 2 , the flow guide assembly includes a first flow guide plate 71, a second flow guide plate 72, and a third flow guide plate 73 arranged in the wind box 10. The first flow guide plate 71 is connected to the side wall of the discharge box 40 away from the air inlet channel 50. The second flow guide plate 72 is connected to the inlet of the closed discharge device 30. The third flow guide plate 73 is located on one side of the air outlet pipe 60 close to the air inlet channel 50. The first flow guide plate 71 and the second flow guide plate 72 are inclined from bottom to top and connected, and the connection position of the two is higher than the air inlet channel 50. The third flow guide plate 73 is gradually inclined away from the air inlet channel 50 from top to bottom, and is used to block the corn bran towards the closed discharge device 30.
[0027] The top ends of the first guide plate 71 and the second guide plate 72 are connected, and the two form an inverted V-shaped structure. The mixture falling from the closed feeding device 20 splashes on the first guide plate 71 to form a splashing and scattering state. Because the corn endosperm has a large specific gravity, the splashing distance is far. The corn bran has a small specific gravity and almost does not rebound after colliding on the first guide plate 71. Therefore, the collision of the first guide plate 71 can make the corn endosperm and the corn bran produce a first separation effect. At the same time, the air inlet of the air inlet channel 50 is directed to the first guide plate 71, so that the air flow along the first guide plate 71 flows obliquely upward. The corn bran close to the first guide plate 71 moves obliquely upward along the first guide plate 71, and the corn endosperm far from the first guide plate 71 falls into the falling box 40 based on its large gravity, thereby realizing a second separation of the corn endosperm and the corn bran, and ensuring the purity of the corn endosperm extraction. After the corn bran passes through the first guide plate 71 along the air flow, part of the corn bran falls on the second guide plate 72 due to the large size of the bran body, and finally enters the closed discharger 30 under the guidance of the second guide plate 72. The remaining part of the corn bran with small bran body or no bran body collides on the third guide plate 73. After being blocked by the third guide plate 73, the wind force is small, and the corn bran finally falls into the closed discharger 30. Because the closed discharger 30 cannot transmit air outward, the air flow is turned upward between the third guide plate 73 and the inner wall of the wind box 10 and is discharged from the air outlet pipe 60. Therefore, the corn bran can be prevented from entering the air outlet pipe 60 along the air flow, and the corn bran can be ensured to fall into the closed discharger 30 to realize the collection of the corn bran.
[0028] In some possible implementation manners, please refer to Figure 2 The blocking plate 76 is slidably connected in the wind box 10, the blocking plate 76 is located between the first guide plate 71 and the second guide plate 72, and the top end of the blocking plate 76 is higher than the connection position of the first guide plate 71 and the second guide plate 72. The blocking plate 76 can be adjusted up and down. The blocking plate 76 can form a barrier for the corn endosperm to avoid the corn endosperm splashing and deviating to the side area of the first guide plate 71 away from the air inlet channel 50 and finally falling into the closed discharger 30 to cause waste. The blocking plate 76 can ensure the purity of the corn endosperm extraction while avoiding the waste of the corn endosperm, that is, ensuring the separation effect of the corn endosperm and the corn bran. Specifically, when the air inlet of the air inlet channel 50 is adjusted to be large, the blocking plate 76 is adjusted to be high, and vice versa.
[0029] Further, as shown in Figure 2 The wind box 10 further comprises a fourth guide plate 74 and a fifth guide plate 75 below the closed feeding device 20. The fourth guide plate 74 is used to guide the mixture to slide towards the fifth guide plate 75. The fifth guide plate 75 is used to guide the mixture to slide towards the first guide plate 71.
[0030] The part of the mixed material falling from the closed feeding device 20 first collides with the fourth guide plate 74, and then collides with the fifth guide plate 75 again before falling to the first guide plate 71. The rest of the mixed material falling from the closed feeding device 20 directly collides with the fifth guide plate 75 before falling to the first guide plate 71. That is, the mixed material at least collides with the fifth guide plate 75 once before reaching the first guide plate 71. The difference in rebounding distance due to the different specific gravities of the corn endosperm and the corn bran during the collision process can make the corn endosperm and the corn bran achieve preliminary separation, thereby improving the separation efficiency of the corn endosperm and the corn bran under the collision of the first guide plate 71 and the blowing action of the air inlet channel 50, and further improving the purity of the corn endosperm.
[0031] As a specific embodiment of the closed feeding device 20 described above, please refer to Figure 2 and Figure 3 The closed feeding device 20 includes a feeding box 21 connected to the top wall of the air box 10 and communicating with the air box 10, a feeding roller 22 rotatably connected in the feeding box 21, and a closed assembly 23 provided in the feeding box 21 and connected with the feeding roller 22. The closed assembly 23 is used to close the gap between the feeding roller 22 and the inner wall of the feeding box 21. Here, the rotation of the feeding roller 22 drives the mixed material to continuously fall downward, and the closed assembly 23 closes the gap between the feeding roller 22 and the inner wall of the feeding box 21, thereby avoiding air leakage through the feeding box 21 and affecting the air separation efficiency and quality.
[0032] Specifically, as shown in Figure 2 The closed assembly 23 described above includes a first closed plate 231 and a second closed plate 232 disposed on the two opposite inner walls of the air box 10. Both the first closed plate 231 and the second closed plate 232 extend downwardly and abut against the peripheral wall of the feeding roller 22. The first closed plate 231 and the second closed plate 232 extend obliquely to form a space with a gradually narrowing distance from top to bottom, thereby enabling the mixed material to fall to the feeding roller 22, and then using the rotation of the feeding roller 22 to drive the mixed material to fall into the air box 10 through the first closed plate 231 or the second closed plate 232. In this way, on the one hand, air leakage of the feeding box 21 can be avoided, and on the other hand, uniform feeding of the mixed material into the air box 10 can be ensured, thereby avoiding the mixed material entering the air box 10 in a pile and affecting the air separation effect.
[0033] It should be noted that, please refer to Figures 1 to 3The peripheral wall of the feeding roller 22 is provided with a plurality of feeding grooves 221, and the outer wall of the feeding box 21 is connected with a rotating driving member 222, and the output end of the rotating driving member 222 is coaxially connected with the feeding roller 22. After the mixture enters the feeding grooves 221, the mixture is transferred with the rotation of the feeding roller 22, and the mixture rotating to the lower half of the feeding roller 22 falls from the feeding grooves 221 into the wind box 10. Since the feeding grooves 221 are filled with the mixture, the first air closing plate 231 and the second air closing plate 232 are always closed with the peripheral wall of the feeding grooves 221, thereby ensuring the air closing tightness.
[0034] Further, as shown in Figure 3 , the feeding grooves 221 extend along the axial direction of the feeding roller 22. The inclined extension of the feeding grooves 221 can avoid the whole alignment of the feeding grooves 221 with the first air closing plate 231 or the second air closing plate 232 during the rotation of the feeding grooves 221, thereby reducing the instantaneous sectional area of the feeding grooves 221 corresponding to the first air closing plate 231 and the second air closing plate 232, and avoiding air leakage due to the falling of the mixture in the feeding grooves 221.
[0035] As a specific embodiment of the air closing discharger 30, please refer to Figure 1 and Figure 2 , the air closing discharger 30 includes a discharging auger 31 horizontally connected to the bottom wall of the wind box 10 and a self-weight sealing door 32 connected to the discharging end of the discharging auger 31. The discharging auger 31 realizes the conveying of the material based on the spiral conveying rod inside the discharging auger 31. Specifically, the corn bran falling into the discharging auger 31 moves towards the self-weight sealing door 32 in the discharging auger 31, and the self-weight sealing door 32 is automatically opened under the pushing of the corn bran. Meanwhile, the corn bran can fill the discharging auger 31 by using the blocking force of the self-weight sealing door 32, thereby realizing the air closing effect and avoiding air leakage.
[0036] Optionally, as shown in Figure 2 , the discharging auger 31 in the embodiment includes a spiral conveying section 311 and a hollow section 312, the spiral conveying section 311 is in communication with the wind box 10 in the up-down direction, and the end of the hollow section 312 is provided with the self-weight sealing door 32. The spiral conveying section 311 generates a continuous pushing force on the corn bran, and the self-weight sealing door 32 can be opened by the corn bran filling the rear of the hollow section 312, thereby improving the air closing effect by using the corn bran filling the hollow section 312, and avoiding air leakage.
[0037] It should be noted that, please refer to Figure 2The oblique cut is formed at one end of the hollow section 312 away from the spiral conveying section 311, the self-weight sealing door 32 is hinged to the upper edge of the oblique cut, and the self-weight sealing door 32 is provided with a counterweight plate 321. The oblique cut and the counterweight plate 321 can improve the tightness of the self-weight sealing door 32 closed by gravity, so as to ensure that the corn sprout can fill the hollow section 312, thereby improving the tightness of the closed wind.
[0038] The above merely describes the preferred embodiments of the present application and is not intended to limit the present application, and any modification, equivalent replacement and improvement within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims
1. A post-embryo-removal treatment air separation device for corn, characterized by, The device comprises a wind box, a closed air feeding device and a closed air discharging device; the closed air feeding device is arranged on the top wall of one end of the wind box and is used for continuously feeding the mixture of corn endosperm and corn bran into the wind box; the closed air discharging device is arranged on the bottom wall of the other end of the wind box; the bottom wall of the wind box is provided with a discharging box below the closed air feeding device; the wind box is provided with an air inlet channel on the side wall of one end close to the discharging box, and the air inlet channel is used for blowing air into the wind box; the top wall of the wind box is provided with an air outlet pipe above the closed air discharging device; wherein, the wind box is provided with a flow guide assembly, which is used for guiding the air blown into the wind box to the air outlet pipe and guiding the corn endosperm and the corn bran separated by gravity difference under the action of wind to the discharging box and the closed air discharging device respectively.
2. The corn degerming post-treatment air separation apparatus of claim 1 wherein, The flow guide assembly comprises a first flow guide plate, a second flow guide plate and a third flow guide plate arranged in the wind box; the first flow guide plate is connected with the side wall of the discharging box away from the air inlet channel; the second flow guide plate is connected with the inlet of the closed air discharging device; the third flow guide plate is located on the side of the air outlet pipe close to the air inlet channel; wherein, the first flow guide plate and the second flow guide plate are inclined from bottom to top and connected, and the connection position of the two is higher than the air inlet channel; the third flow guide plate is gradually inclined away from the air inlet channel from top to bottom, and is used for blocking the corn bran towards the closed air discharging device.
3. The corn degerming post-treatment air separation apparatus of claim 2, wherein, A blocking plate is slidably connected in the wind box, and the blocking plate is located between the first flow guide plate and the second flow guide plate, and the top end of the blocking plate is higher than the connection position of the first flow guide plate and the second flow guide plate.
4. The corn degerming post-treatment air separation apparatus of claim 2 wherein, The wind box is further provided with a fourth flow guide plate and a fifth flow guide plate below the closed air feeding device, the fourth flow guide plate is used for guiding the mixture to slide towards the fifth flow guide plate, and the fifth flow guide plate is used for guiding the mixture to slide towards the first flow guide plate.
5. The corn degerming post-treatment air separation apparatus of claim 1 wherein, The closed air feeding device comprises a feeding box connected to the top wall of the wind box and in communication with the wind box, a feeding roller rotatably connected in the feeding box, and a closed air assembly arranged in the feeding box and connected with the feeding roller, the closed air assembly is used for closing the gap between the feeding roller and the inner wall of the feeding box.
6. The corn degerming post-treatment air separation apparatus of claim 5 wherein, The closed air assembly comprises a first closed air plate and a second closed air plate separately arranged on two opposite inner walls of the wind box, and the first closed air plate and the second closed air plate are both inclined downward and in contact with the peripheral wall of the feeding roller.
7. The corn degerming post-treatment air separation apparatus of claim 5 wherein, The peripheral wall of the feeding roller is spaced apart with a plurality of feeding grooves, the outer wall of the feeding box is connected with a rotary driving member, and the output end of the rotary driving member is coaxially connected with the feeding roller.
8. The corn degerming post-treatment air separation apparatus of any one of claims 1-7, wherein, The closed air discharging device comprises a discharging auger horizontally connected to the bottom wall of the wind box and a self-gravity sealing door connected to the discharging end of the discharging auger.
9. The corn degerming post-treatment air separation apparatus of claim 8 wherein, The discharging auger comprises a spiral conveying section and a hollow section, the spiral conveying section is in communication with the wind box, and the end of the hollow section is provided with the self-gravity sealing door.
10. The corn degerming post-treatment air separation apparatus of claim 9, wherein, The hollow section forms a bevel cut at one end away from the spiral conveying section, the self-gravity door is hinged to the upper edge of the bevel cut, and the self-gravity door is provided with a counterweight plate.