Light and heavy impurity separation system and separation method

Abstract

The invention discloses a light and heavy impurity separation system and a separation method, relates to the field of winnowing separation equipment, and solves the problems that when an existing light and heavy impurity separation system and a separation method are used, raw materials are difficult to uniformly convey into the equipment, and light and heavy impurities are difficult to directly separate and output in the separation process. Comprising a separation box, an input mechanism and a separation mechanism, the input mechanism comprises a feeding box, a rotating rod, a rotating plate, a shaking plate, a first spring and a stirring piece, raw materials to be separated are evenly conveyed into the separation box through the input mechanism, the shaking plate is driven by the stirring piece to shake in the conveying process, light and heavy impurities are preliminarily separated, and the separation efficiency is improved. The heavy-component impurities are conveyed into the separation box more quickly for subsequent separation operation, the light-component impurities, the heavy-component impurities and needed raw materials are separated and output through the separation mechanism, the device is high in integrity and automation degree, and the light-component impurity and heavy-component impurity separation and conveying efficiency is effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of air separation equipment, and in particular to a light and heavy impurity separation system and method. Background Art

[0002] With the advancement of the country's dual carbon goals, processes and production lines for producing artificial boards using non-wood raw materials such as reeds and crop straw are springing up like mushrooms after a rain. Alternative industries that use non-wood resources to replace natural forest wood to produce artificial boards are becoming a trend.

[0003] Non-wood materials have two major characteristics that become problems for the production of artificial boards. First, these materials may be mixed with heavy impurities such as mud, sand and gravel brought into the soil during the harvesting process. Second, non-crop straw often contains a large amount of light impurities such as flowers and leaves. Heavy impurities can cause damage to artificial board production equipment and damage to cutting tools in the cutting process of artificial furniture production, while light impurities can seriously affect the performance and production cost of the board. Therefore, these two types of impurities must be removed.

[0004] Existing separation devices are generally only capable of separating light components or heavy components. When separating multiple impurities of different weights, mixing is likely to occur. The raw materials are directly piled up and transported to the inside of the equipment, resulting in relatively low separation efficiency. For this reason, the present invention proposes a light and heavy impurity separation system and separation method. Summary of the Invention

[0005] The object of the present invention is to provide a light and heavy impurity separation system and separation method that are convenient for improving the light and heavy impurity transportation and separation efficiency, so as to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a light and heavy impurity separation system, comprising a separation box, an input mechanism and a separation mechanism, wherein a support frame is fixedly connected to the bottom of the separation box, the input mechanism comprises a feed box fixedly installed on the upper side of the separation box, a rotating rod is rotatably connected to the feed box, the outer wall of the rotating rod is evenly fixedly connected to multiple groups of rotating plates, the outer wall of the rotating rod is rotatably connected to multiple groups of shaking plates, the side of the shaking plate is fixedly connected to a first spring fixedly connected to the rotating plate, a toggle member for controlling the shaking state of the shaking plate is provided in the feed box, the input mechanism can evenly transport the raw materials to be separated into the separation box, and drive the shaking plate to shake through the toggle member during the transportation process, thereby performing preliminary separation of light and heavy impurities, so that the impurities of the heavy component are transported to the separation box more quickly for subsequent separation operations, and the separation mechanism is installed in the separation box, for separating and outputting light and heavy component impurities and required raw materials respectively, so as to improve the efficiency of transporting and separating light and heavy impurities.

[0007] Preferably, the separation mechanism includes a fan installed on the side of the separation box, the output end of the fan is connected to the air outlet pipe, the air outlet pipe is connected to a blast pipe, the bottom of the separation box is fixedly connected to an impurity trough and an output trough, the side of the separation box is fixedly connected to a blow box, one end of the blast pipe is connected to the blow box, and the air outlet pipe is connected to an external exhaust port, so as to facilitate control of the air intake and air outlet in the separation box, the impurity trough is located on the side close to the blow box, and the output trough is located on the side away from the blow box, and a separation component for improving the separation efficiency is provided in the separation box, so as to facilitate the separation and output of light and heavy component impurities and required raw materials.

[0008] Preferably, the separation element includes a guide frame fixedly mounted on the upper side of the separation box, the inner walls on both sides of the guide frame are inclined, a conveying trough is provided at the bottom of the feed box, the bottom end of the conveying trough is facing the inclined position of the guide frame, and the side of the output trough is provided with an air supply box connected to the separation box, and one end of the air outlet pipe is connected to the air supply box to facilitate improving the separation efficiency.

[0009] Preferably, the toggle member includes multiple groups of toggle blocks installed in the feed box, one end of the toggle block is conical, and multiple groups of sliding grooves are provided in the feed box. The toggle block is slidably connected to the inner wall of the sliding groove, and a second spring fixedly connected to the sliding groove is fixedly connected to the toggle block to facilitate the control of the shaking state of the shaking plate. The rotating plate rotates counterclockwise around the rotating rod, and multiple groups of toggle blocks are respectively located on the left and lower positions of the rotating rod, and only the raw materials to be input are shaken, and the shaking plate of the other side hole does not need to be shaken. The toggle block below can fully output the internal raw materials downward during the shaking of the shaking plate.

[0010] Preferably, the separator also includes a collecting frame fixedly mounted above the guide frame, a plurality of baffles are fixedly connected in the collecting frame, an output pipe is connected to the top of the collecting frame, one end of the output pipe is connected to a cyclone separator, the output end of the cyclone separator is connected to a return pipe, one end of the return pipe is connected to the air inlet of the fan, and a rotary valve is provided on the cyclone separator to facilitate the separation and output of the light component impurities output upward.

[0011] Preferably, the input mechanism also includes a conveying box fixedly mounted on the upper side of the feed box, a connecting groove connected to the bottom end of the conveying box is opened on the upper side of the feed box, a feed screw is rotatably connected in the conveying box, one end of the rotating rod is coaxially fixedly connected to a first gear, one end of the feed screw is coaxially fixedly connected to a second gear meshing with the first gear, the pitch circle radius of the second gear is smaller than the pitch circle radius of the first gear, so that when the rotating plate rotates slowly, the feed screw can rotate quickly to evenly transport the raw materials to the shaking plate, so as to facilitate the delivery of the raw materials to be separated into the feed box.

[0012] Preferably, the separation mechanism also includes a discharge screw rotatably connected to the inner wall of the impurity trough, a discharge screw rotatably connected in the output trough, a drive shaft rotatably connected in the separation box, and multiple groups of separation nets are evenly and fixedly connected to the outer wall of the drive shaft. A drive member is provided on the side of the output trough for driving the discharge screw and the drive shaft to rotate, so as to facilitate the separation and output of impurities and required raw materials.

[0013] Preferably, the driving member includes a driving motor fixedly mounted on the side of the output trough, the output end of the driving motor is coaxially fixedly connected to one end of the discharging screw, the discharging screw is connected to a first transmission belt connected to the pulley on the driving shaft through a pulley transmission, the discharging screw is connected to a second transmission belt connected to the pulley on the discharging screw through a pulley transmission, and the discharging screw is connected to a third transmission belt connected to the pulley on the first gear through a pulley transmission, so as to drive the discharging screw and the driving shaft to rotate.

[0014] Preferably, a distribution plate is rotatably connected to the upper edge of the impurity trough to facilitate adjustment of the tilt angle so that the sand and raw materials on both sides of the set position can be blocked and separated.

[0015] A separation method for a light and heavy impurity separation system comprises the following steps: S1. The raw materials are fed into the feed box through the input mechanism. The rotating plate and the shaking plate are driven by the rotating rod to rotate at a constant speed, evenly separating the raw materials between adjacent rotating plates to ensure the uniformity of raw material input; S2. During the shaking plate's rotation, the toggle member is used to toggle the shaking plate, causing it to shake relative to the rotating plate. This helps even out the raw materials above the shaking plate and also helps to shake the heavy impurities further downward, improving the efficiency of subsequent separation. S3. Input the material in the feed box into the separation box, and generate a bypass flow in the separation box through the separation mechanism, so that impurities of different weights are output to the set positions for output.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The present invention provides a light and heavy impurity separation system and separation method, which solves the problem that raw materials are difficult to be evenly transported into the interior of the equipment and light and heavy impurities are difficult to be directly separated and output during the separation process when the existing light and heavy impurity separation system and separation method are used. The input mechanism transports the raw materials to be separated into the separation box evenly, and drives the shaking plate to shake through the toggle member during the transportation process to perform preliminary separation of light and heavy impurities, so that the heavy component impurities are transported to the separation box more quickly for subsequent separation operations, and the light and heavy component impurities and the required raw materials are separated and output separately through the separation mechanism. The device has strong integrity and high degree of automation, which effectively improves the efficiency of separation and transportation of light and heavy impurities. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 for Figure 1 Enlarged view of area A in the middle; Figure 3 for Figure 1 Enlarged view of area B in the middle; Figure 4 It is a schematic diagram of the partial structure of the input mechanism of the present invention; Figure 5 It is a schematic diagram of the partial structure of the separation mechanism of the present invention; Figure 6 for Figure 5 Enlarged view of area C in the middle; Figure 7 This is a schematic diagram of the partial structure of the separation element of the present invention; Figure 8 for Figure 7 Enlarged view of area D in the middle; Figure 9 This is a schematic diagram of the partial structure of the toggle member of the present invention; Figure 10 for Figure 9 Enlarged view of area E in the middle.

[0018] In the figure: 1-separation box; 2-support frame; 3-feeding box; 4-rotating rod; 5-rotating plate; 6-shaking plate; 7-first spring; 8-toggle member; 9-fan; 10-air outlet pipe; 11-blast pipe; 12-impurity trough; 13-output trough; 14-blast box; 15-separation member; 16-guide frame; 17-conveying trough; 18-air supply box; 19-toggle block; 20-sliding groove; 21-second spring; 22-collection frame; 23-baffle ;24-output pipe;25-cyclone separator;26-return pipe;27-rotary valve;28-conveyor box;29-connecting groove;30-feed screw;31-first gear;32-second gear;33-discharge screw;34-discharge screw;35-drive shaft;36-separation net;37-drive member;38-drive motor;39-first transmission belt;40-second transmission belt;41-third transmission belt;42-external exhaust port;43-distribution plate. DETAILED DESCRIPTION

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] See also Figures 1-10 The present invention provides a technical solution: a light and heavy impurity separation system, including a separation box 1, an input mechanism and a separation mechanism. The support frame 2 is fixedly connected to the bottom of the separation box 1. The input mechanism includes a feed box 3 fixedly installed on the upper side of the separation box 1. A rotating rod 4 is rotatably connected in the feed box 3. The outer wall of the rotating rod 4 is evenly fixedly connected to multiple groups of rotating plates 5. The outer wall of the rotating rod 4 is rotatably connected to multiple groups of shaking plates 6. The side of the shaking plate 6 is fixedly connected to a first spring 7 fixedly connected to the rotating plate 5. A toggle member 8 for controlling the shaking state of the shaking plate 6 is provided in the feed box 3. The toggle member 8 includes multiple groups of A toggle block 19, one end of which is conical, is provided in the feed box 3 with a plurality of sliding grooves 20, the toggle block 19 is slidably connected to the inner wall of the sliding groove 20, and a second spring 21 fixedly connected to the sliding groove 20 is fixedly connected to the toggle block 19. The input mechanism can evenly transport the raw materials to be separated into the separation box 1, and during the transportation process, the toggle member 8 drives the shaking plate 6 to shake, and preliminarily separates the light and heavy impurities, so that the heavy component impurities are transported to the separation box 1 faster for subsequent separation operations. The separation mechanism is installed in the separation box 1, and is used to separate and output the light and heavy component impurities and the required raw materials respectively.

[0021] The separation mechanism includes a fan 9 installed on the side of the separation box 1, the output end of the fan 9 is connected to the air outlet pipe 10, the air outlet pipe 10 is connected to the blower pipe 11, and the air outlet pipe 10 is connected to the external exhaust port 42. The bottom of the separation box 1 is fixedly connected to the impurity trough 12 and the output trough 13, the upper edge position of the impurity trough 12 is rotatably connected to the distribution plate 43, the side of the separation box 1 is fixedly connected to the blower box 14, one end of the blower pipe 11 is connected to the blower box 14, the impurity trough 12 is located on the side close to the blower box 14, and the output trough 13 is located on the side away from the blower box 14. A separation component 15 for improving the separation efficiency is provided in the separation box 1.

[0022] The separation member 15 includes a guide frame 16 fixedly mounted on the upper side of the separation box 1. The inner walls on both sides of the guide frame 16 are inclined. A conveying trough 17 is provided at the bottom of the feed box 3. The bottom end of the conveying trough 17 faces the inclined position of the guide frame 16. An air supply box 18 connected to the separation box 1 is provided on the side of the output trough 13. One end of the air outlet pipe 10 is connected to the air supply box 18.

[0023] The separator 15 also includes a collecting frame 22 fixedly mounted above the guide frame 16, and a plurality of baffles 23 are fixedly connected inside the collecting frame 22. An output pipe 24 is connected to the top of the collecting frame 22, and one end of the output pipe 24 is connected to a cyclone separator 25. The output end of the cyclone separator 25 is connected to a return pipe 26, and one end of the return pipe 26 is connected to the air inlet of the fan 9. A rotary valve 27 is provided on the cyclone separator 25.

[0024] The input mechanism also includes a conveying box 28 fixedly mounted on the upper side of the feed box 3. A connecting groove 29 connected to the bottom end of the conveying box 28 is opened on the upper side of the feed box 3. A feed screw 30 is rotatably connected inside the conveying box 28. One end of the rotating rod 4 is coaxially fixedly connected to a first gear 31. One end of the feed screw 30 is coaxially fixedly connected to a second gear 32 meshing with the first gear 31. The pitch circle radius of the second gear 32 is smaller than the pitch circle radius of the first gear 31.

[0025] The separation mechanism also includes a discharge screw 33 rotatably connected to the inner wall of the impurity trough 12, a discharge screw 34 rotatably connected in the output trough 13, a drive shaft 35 rotatably connected in the separation box 1, and multiple groups of separation nets 36 are evenly and fixedly connected to the outer wall of the drive shaft 35. A drive member 37 is provided on the side of the output trough 13 for driving the discharge screw 34 and the drive shaft 35 to rotate.

[0026] The driving member 37 includes a driving motor 38 fixedly mounted on the side of the output groove 13. The model of the driving motor 38 is preferably YYHS-40. The output end of the driving motor 38 is coaxially fixedly connected to one end of the discharging screw 34. The discharging screw 34 is connected to a first transmission belt 39 connected to the pulley on the driving shaft 35 through a pulley transmission. The discharging screw 34 is connected to a second transmission belt 40 connected to the pulley on the discharge screw 33 through a pulley transmission. The discharge screw 33 is connected to a third transmission belt 41 connected to the pulley on the first gear 31 through a pulley transmission.

[0027] See also Figures 1-10 The present invention provides a separation method of a light and heavy impurity separation system, comprising the following steps: S1. The raw materials are input into the feed box 3 through the input mechanism, and the rotating plate 5 and the shaking plate 6 are rotated at a constant speed by the rotating rod 4, and the raw materials are evenly separated between adjacent rotating plates 5 to ensure the uniformity of the raw material input; S2. During the rotation of the shaking plate 6, the shaking plate 6 is toggled by the toggle member 8, causing the shaking plate 6 to shake relative to the rotating plate 5, thereby assisting in evenly shaking the raw materials above the shaking plate 6 and also assisting in shaking the heavy component impurities to a lower position, thereby improving the efficiency of subsequent separation; S3. Input the contents of the feed box 3 into the separation box 1, and generate a circumferential flow in the separation box 1 through the separation mechanism, so that impurities of different weights are output to the set positions for output.

[0028] Working principle: Start the drive motor 38, the drive motor 38 drives the discharge screw 34 to rotate, drives the drive shaft 35 to rotate through the first transmission belt 39, drives the discharge screw 33 to rotate through the second transmission belt 40, and the discharge screw 33 drives the first gear 31 to rotate through the third transmission belt 41. The first gear 31 drives the rotating rod 4 to rotate. At the same time, the first gear 31 drives the second gear 32 to rotate rapidly, and the second gear 32 drives the feed screw 30 to rotate, thereby realizing the input operation of raw materials.

[0029] The raw materials to be separated are continuously input into the conveying box 28, and the raw materials are transported to the conveying box 28 through the feeding screw 30, and fall downward into the feed box 3 through the connecting groove 29. The rotating rod 4 will drive the rotating plate 5 to rotate at a uniform speed during the rotation, and the raw materials will fall into the position between adjacent rotating plates 5 through the connecting groove 29. Since the rotation speed of the rotating plate 5 is stable, the amount of raw materials falling into the feed box 3 each time is relatively stable, and the raw materials input through the feeding screw 3 can be continuously transported to the shaking plate 6 for relatively uniform distribution, instead of being directly accumulated and falling into the separation box 1 from a fixed position. The raw materials on the shaking plate 6 will rotate with the rotating plate 5, and in the process of rotation, the side of the shaking plate 6 will conflict with the tip of the toggle block 19, so that the first spring 7 is stretched. When the thrust of the shaking plate 6 on the tip of the toggle block 19 continues to increase, until the toggle block 19 is pushed in. After the shaking plate 6 passes over the toggle block 19, the second spring 21 pushes the toggle block 19 to rebound and reset. After that, the toggle block 19 can continue to toggle the next group of shaking plates 6. This structure can reduce the situation where heavy component impurities are wrapped by light raw materials and cannot be separated during the falling process.

[0030] It is worth noting that the shaking of the shaking plate 6 has three functions: first, the raw materials are evenly distributed and transported to the separation box 1; second, the raw materials in the feed box 3 can be fully input into the separation box 1 through shaking, thereby preventing the raw materials from continuously adhering to the shaking plate 6 during the rotation and transportation process; third, the impurities on the shaking plate 6 are pre-stratified and screened, so that the light and heavy impurities are pre-separated, thereby improving the efficiency of subsequent separation.

[0031] Start the fan 9 to blow air to the air outlet pipe 10, and the gas is transported to the blower box 14 through the blower pipe 11, and then to the air supply box 18 through the air outlet pipe 10. At this time, the raw materials sliding obliquely downward from the inclined position of the upper guide frame 16 will be pushed to a farther position by the horizontal wind blown by the blower box 14, while the heavy impurities are difficult to be pushed and fall into the impurity tank 12 which is closer. By adjusting the inclination angle of the distribution plate 43, the sand and raw materials on both sides of the set position can be blocked and separated, and the light component impurities will be in the horizontal direction. During the blowing process, the impurities with light components are sucked upward by the oblique upward thrust of the air supply box 18 below and the suction force of the output pipe 24 above. After being blocked by the baffle 23, a part of the required raw materials pushed upward are blocked, while the lighter impurities with smaller volume are transported upward to the collection frame 22 and the output pipe 24 through the gap of the baffle 23. After separation by the cyclone separator 25, the impurities can be discharged through the rotary valve 27, and the filtered air flow is transported back to the suction end of the fan 9 through the return pipe 26 for circulation.

[0032] It is worth noting that: in order to ensure that the wind force sucked through the output pipe 24 is always greater than the separation force input through the blower box 14 and the air supply box 18, an external exhaust port 42 is set at the position of the outlet pipe 10 to slightly reduce the wind pressure in the outlet pipe 10, so as to avoid the wind pressure input into the separation box 1 being too high, and the gas being blown out from the impurity tank 12 and the output tank 13. By setting the drive shaft 35 and the separation net 36, the raw materials falling above the output tank 13 are rotated in the clockwise direction and transported to the output tank 13 below. During the rotation and transportation process, the air supply box 18 always blows slightly upward, making it difficult for the light impurities inside to fall downward into the output tank 13. At the same time, the large number of holes in the separation net 36 can reduce the obstruction to the airflow, so that the gas discharged from the air supply box 18 can be continuously transported upward. The rotation of the separation net 36 delays the time for the raw materials to fall into the output tank 13, thereby further improving the separation efficiency.

[0033] The heavy impurities in the impurity tank 12 will be discharged from one end of the impurity tank 12 under the push of the discharge screw 33, while the required raw materials in the output tank 13 will be discharged from one end of the output tank 13 under the push of the discharge screw 34, and the light impurities will be discharged through the rotary valve 27 on the cyclone separator 25, thereby achieving the purpose of simultaneous screening and separation of light and heavy impurities of different components.

[0034] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0035] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A light and heavy impurity separation system, characterized in that: include: A separation box (1), wherein a support frame (2) is fixedly connected to the bottom of the separation box (1); Also includes: An input mechanism, the input mechanism includes a feed box (3) fixedly mounted on the upper side of the separation box (1), a rotating rod (4) rotatably connected in the feed box (3), a plurality of rotating plates (5) evenly and fixedly connected to the outer wall of the rotating rod (4), a plurality of shaking plates (6) rotatably connected to the outer wall of the rotating rod (4), a first spring (7) fixedly connected to the rotating plate (5) is fixedly connected to the side of the shaking plate (6), a toggle member (8) for controlling the shaking state of the shaking plate (6) is provided in the feed box (3), the input mechanism can uniformly transport the raw materials to be separated into the separation box (1), and drive the shaking plate (6) to shake through the toggle member (8) during the transportation process, thereby performing preliminary separation of light and heavy impurities, so that the heavy impurities are transported to the separation box (1) more quickly for subsequent separation operations; A separation mechanism is installed in the separation box (1) and is used to separate and output light and heavy component impurities and required raw materials.

2. A light and heavy impurity separation system according to claim 1, characterized in that: The separation mechanism includes a fan (9) installed on the side of the separation box (1), the output end of the fan (9) is connected to an air outlet pipe (10), the air outlet pipe (10) is connected to a blast pipe (11), the air outlet pipe (10) is connected to an external air outlet (42), the bottom of the separation box (1) is fixedly connected to an impurity tank (12) and an output tank (13), the side of the separation box (1) is fixedly connected to a blast box (14), one end of the blast pipe (11) is connected to the blast box (14), the impurity tank (12) is located on a side close to the blast box (14), and the output tank (13) is located on a side away from the blast box (14), and a separation component (15) for improving separation efficiency is provided in the separation box (1).

3. A light and heavy impurity separation system according to claim 2, characterized in that: The separation member (15) includes a guide frame (16) fixedly mounted on the upper side of the separation box (1), the inner walls of both sides of the guide frame (16) are inclined, a conveying trough (17) is provided at the bottom of the feed box (3), the bottom end of the conveying trough (17) is facing the inclined surface of the guide frame (16), and a supplementary air box (18) connected to the separation box (1) is provided on the side of the output trough (13), and one end of the air outlet pipe (10) is connected to the supplementary air box (18).

4. The light and heavy impurity separation system according to claim 1, characterized in that: The toggle member (8) includes a plurality of toggle blocks (19) installed in the feed box (3), one end of the toggle block (19) is tapered, a plurality of sliding grooves (20) are provided in the feed box (3), the toggle block (19) is slidably connected to the inner wall of the sliding groove (20), and a second spring (21) fixedly connected to the sliding groove (20) is fixedly connected to the toggle block (19).

5. The light and heavy impurity separation system according to claim 3, characterized in that: The separator (15) further comprises a collecting frame (22) fixedly mounted above the guide frame (16), wherein a plurality of baffles (23) are fixedly connected in the collecting frame (22), an output pipe (24) is connected above the collecting frame (22), one end of the output pipe (24) is connected to a cyclone separator (25), an output end of the cyclone separator (25) is connected to a return pipe (26), one end of the return pipe (26) is connected to an air inlet of the fan (9), and a rotary valve (27) is provided on the cyclone separator (25).

6. The light and heavy impurity separation system according to claim 2, characterized in that: The input mechanism further includes a conveying box (28) fixedly mounted on the upper side of the feed box (3), a connecting groove (29) connected to the bottom end of the conveying box (28) is opened on the upper side of the feed box (3), a feed screw (30) is rotatably connected in the conveying box (28), one end of the rotating rod (4) is coaxially fixedly connected to a first gear (31), one end of the feed screw (30) is coaxially fixedly connected to a second gear (32) meshing with the first gear (31), and the pitch circle radius of the second gear (32) is smaller than the pitch circle radius of the first gear (31).

7. The light and heavy impurity separation system according to claim 6, characterized in that: The separation mechanism further includes a discharge screw (33) rotatably connected to the inner wall of the impurity trough (12), a discharge screw (34) rotatably connected in the output trough (13), a drive shaft (35) rotatably connected in the separation box (1), and a plurality of separation nets (36) are evenly and fixedly connected to the outer wall of the drive shaft (35). A drive member (37) for driving the discharge screw (34) and the drive shaft (35) to rotate is provided on the side of the output trough (13).

8. The light and heavy impurity separation system according to claim 7, characterized in that: The driving member (37) includes a driving motor (38) fixedly mounted on a side of the output groove (13), an output end of the driving motor (38) is coaxially fixedly connected to one end of the discharge screw (34), the discharge screw (34) is connected to a first transmission belt (39) connected to a pulley on the driving shaft (35) through a pulley transmission, the discharge screw (34) is connected to a second transmission belt (40) connected to a pulley on the discharge screw (33) through a pulley transmission, and the discharge screw (33) is connected to a third transmission belt (41) connected to a pulley on the first gear (31) through a pulley transmission.

9. The light and heavy impurity separation system according to claim 2, characterized in that: The upper edge of the impurity groove (12) is rotatably connected to a distribution plate (43).

10. A separation method based on a light and heavy impurity separation system according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1. The raw materials are input into the feed box (3) through the input mechanism, and the rotating plate (5) and the shaking plate (6) are driven by the rotating rod (4) to rotate at a uniform speed, so that the raw materials are evenly separated between adjacent rotating plates (5) to ensure the uniformity of the raw material input; S2. During the rotation of the shaking plate (6), the shaking plate (6) is toggled by the toggle member (8), so that the shaking plate (6) is shaken relative to the rotating plate (5), thereby assisting in shaking the raw materials above the shaking plate (6) and also assisting in shaking the heavy component impurities to a more downward position, thereby improving the efficiency of subsequent separation; S3. The feed box (3) is fed into the separation box (1), and a separation mechanism is used to generate a circumferential flow in the separation box (1), so that impurities of different weights are respectively output to the set positions for output.

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