A refining system for production of difenzoquat technical

Abstract

The application discloses a refining system for producing difenzoquat acid, which comprises a drying cylinder, a jacket is arranged outside the drying cylinder, a feeding pipe is communicated with the drying cylinder, a liquid inlet pipe and a liquid outlet pipe are communicated with the jacket, a frame is arranged in the drying cylinder, fins are arranged on the inner side of the frame, and guide grooves are arranged on the two sides of the frame. The application overcomes the defects of the prior art, increases the heat transfer area of the material in the equipment, improves the heat transfer efficiency of the material, improves the drying efficiency of the material, and has high social use value and application prospect.

Description

Technical Field

[0001] This invention relates to the field of chemical technology, and in particular to a refining system for the production of pyrifluquinazon technical. Background Technology

[0002] Pyrfluthrin is a chemical that belongs to the class of carotenoid biosynthesis inhibitors. It is a broad-spectrum selective herbicide for wheat fields. Its production process requires a series of reactions followed by distillation, solvent removal, and purification. Then, at the end of the purification process, the product is crystallized, centrifuged, and dried to obtain qualified pyrfluthrin products.

[0003] The existing refining process requires the use of a rake-type vacuum dryer to dry the material. The rake blades agitate the material inside the drum, allowing it to undergo heat exchange and drying within the drum.

[0004] However, in existing drying processes, the heat transfer inside the equipment is mostly achieved by the inner wall of the cylinder relying on the external jacket for heating, resulting in a fixed heat transfer area inside the cylinder.

[0005] Furthermore, during actual use, the rake blades agitate the material, causing it to adhere to the blades to some extent, resulting in material accumulation and a certain amount of material loss after drying. Due to the internal shape of the cylinder, the material feeding efficiency is relatively slow.

[0006] To this end, the inventors designed and developed a refining system for the production of pyrifluquinazon technical grade, which effectively improves the overall drying efficiency of the material by increasing the heat transfer area. Summary of the Invention

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A refining system for the production of pyrifluquinazon technical grade includes a drying cylinder with a jacket on the outside, a feed pipe connected to the drying cylinder, a liquid inlet pipe and a liquid outlet pipe connected to the jacket, a frame inside the drying cylinder, fins on the inner side of the frame, and guide grooves on both sides of the frame.

[0009] The bottom end of the drying cylinder is provided with a feeding cylinder, the bottom surface of the inner cavity of the drying cylinder is provided with a feeding port communicating with the feeding cylinder, the bottom surface of the inner cavity of the drying cylinder is provided with a support frame, and the bottom end of the feeding cylinder is connected to a discharge pipe.

[0010] Preferably, the drying cylinder is provided with a main shaft, and the end of the main shaft is connected to a main motor installed on the outside of the drying cylinder. The main shaft is provided with a mounting bracket.

[0011] Preferably, the mounting frame is movably fitted with a tie rod, and both sides of the tie rod are provided with balance bars that cooperate with the mounting frame to provide balance for the tie rod. The tie rod is provided with a rake blade that is fitted with the fin, and the rake blade has a notch for being fitted with the fin.

[0012] Preferably, the bottom of the inner side of the trough is provided with a guide post that slides and fits with the guide groove, the bottom of the rake blade is provided with a pusher plate that contacts the inner side of the drying cylinder, and the bottom of the middle part of the rake blade contacts the surface of the support frame.

[0013] Preferably, a scraping mechanism is movably fitted inside the tie rod. The scraping mechanism includes an extension rod that is movably embedded in a notch. The extension rod is movably fitted with the tie rod, and the top end of the extension rod is provided with a return spring that is connected to the top of the inner cavity of the tie rod.

[0014] Preferably, the bottom end of the extension rod is provided with an adjustment block that contacts the top surface of the fins, and the adjustment block is provided with a scraper that contacts the side surface of the rake blade.

[0015] Preferably, the discharge port is provided with an arc-shaped sealing plate, and the arc-shaped sealing plate is provided with an arc-shaped toothed groove plate.

[0016] Preferably, a transmission chamber is provided inside the feeding cylinder, and an adjustment shaft is rotatably provided inside the transmission chamber. The adjustment shaft is provided with a gear column that meshes with and matches the arc-shaped toothed plate. The end of the adjustment shaft is connected to a synchronization box installed on the outside of the drying cylinder. The synchronization box is provided with an adjustment motor that works with it to drive the adjustment shaft to rotate.

[0017] Preferably, the feeding cylinder is equipped with an auger shaft, and a feeding motor for driving the auger shaft to rotate is provided on the outside of the feeding cylinder.

[0018] Preferably, the scraper blade is provided with a straight toothed rack at its end, and the rake blade is provided with a stirring mechanism, which includes a rotating shaft that is rotatably connected to the rake blade.

[0019] Preferably, the end of the rotating shaft is provided with a spur gear that meshes with a spur rack, and the rotating shaft is also provided with blades for stirring the material.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] 1. By setting up the frame, fins can be installed inside the drying cylinder to increase the heat transfer area inside the drying cylinder and improve the efficiency of drying the material inside the drying cylinder.

[0022] 2. By setting up the rake blades and utilizing the cooperation between the guide groove, main shaft, mounting bracket, tie rod, rake blades and guide column, the grooves can be set on the fins so that the movement of the rake blades can clean the adhering substances on the fin surface in a timely manner, avoiding the accumulation of adhering substances that affect the heat transfer efficiency of the fins.

[0023] 3. By setting up the fins and utilizing their shape characteristics, the adjusting block can adjust the position of the scraper on the surface of the rake blade according to the position of the rake blade on the fins, so that the scraper can act on the surface of the rake blade to scrape off the material adhering to the surface of the rake blade.

[0024] 4. By setting up the scraping mechanism, the reciprocating movement of the scraper on the surface of the rake blade allows the rack to reciprocate, which in turn drives the shaft to rotate in conjunction with the spur gear. This allows the rake blade to act on the material simultaneously during the movement, thereby improving the material agitation efficiency.

[0025] 5. By opening the fluid cavity, the liquid flowing inside the jacket will enter the fluid cavity through the holes on the surface of the drying cylinder, so that the fins can assist the inner wall of the drying cylinder in heat transfer, thereby achieving a synergistic effect and increasing the heat transfer area of ​​the material inside the drying cylinder.

[0026] 6. The feeding cylinder allows the dried material to enter the cylinder through the feeding port. The output shaft of the feeding motor drives the auger shaft to rotate, allowing the material to be discharged and collected through the discharge pipe, facilitating the removal of material from the drying cylinder.

[0027] In summary, this invention overcomes the shortcomings of the prior art by increasing the heat transfer area inside the equipment for drying materials, thereby improving the heat transfer efficiency of the materials and thus enhancing the drying efficiency. It has high social value and application prospects. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0030] Figure 2 This is a schematic cross-sectional view of the structure of the present invention;

[0031] Figure 3 This is a schematic diagram showing the positions of the arc-shaped toothed plate and the gear column structure in this invention;

[0032] Figure 4 This is a schematic diagram of the internal structure of the present invention;

[0033] Figure 5 This is a schematic diagram showing the structural position of the frame in this invention;

[0034] Figure 6 This is a schematic diagram of the internal structure of the drying cylinder in this invention;

[0035] Figure 7 This is a schematic diagram showing the structural position of the rake blade in this invention;

[0036] Figure 8 This is a schematic diagram of the structural assembly of the rake blade and fins in this invention;

[0037] Figure 9 This is a schematic cross-sectional view of the rake blade in this invention;

[0038] Figure 10 This is a schematic diagram of the structure of the rake blade in this invention;

[0039] Figure 11 This is a schematic diagram showing the structural positions of the slag scraping mechanism and the stirring mechanism in this invention;

[0040] Figure 12 For this Figure 11 Enlarged view of the local structure at point A;

[0041] Figure 13 This is a schematic diagram of the frame structure in this invention;

[0042] Figure 14 This is a schematic cross-sectional view of the structure in Embodiment 3 of the present invention.

[0043] In the diagram: 1. Drying cylinder; 101. Feed pipe; 102. Discharge pipe; 103. Discharge port; 104. Support frame; 105. Transmission chamber; 2. Frame; 21. Fin; 211. Fluid chamber; 201. Guide groove; 3. Discharge cylinder; 31. Screw shaft; 311. Discharge motor; 4. Main shaft; 401. Mounting bracket; 41. Main motor; 5. Tie rod; 51. Rake blade; 511. Groove; 512. Guide column; 513. Pusher plate 52. Balance bar; 6. Slag scraping mechanism; 601. Extension rod; 602. Return spring; 603. Adjusting block; 604. Scraper; 605. Straight rack; 7. Stirring mechanism; 701. Rotating shaft; 702. Spur gear; 703. Blade; 8. Arc-shaped sealing plate; 81. Arc-shaped toothed groove plate; 9. Adjusting shaft; 91. Gear column; 10. Synchronizing box; 11. Adjusting motor; 100. Jacket; 1001. Liquid inlet pipe; 1002. Liquid outlet pipe. Detailed Implementation

[0044] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0045] Example 1

[0046] Reference Figure 1-13 A refining system for the production of pyrifluquinazon technical grade includes a drying cylinder 1, a jacket 100 on the outside of the drying cylinder 1, a feed pipe 101 connected to the drying cylinder 1, a liquid inlet pipe 1001 and a liquid outlet pipe 1002 connected to the jacket 100, a frame 2 inside the drying cylinder 1, fins 21 on the inner side of the frame 2, and guide grooves 201 on both sides of the frame 2. The heat transfer of the fins 21 allows the liquid flowing inside the jacket 100 to contact the drying cylinder 1 and be transferred to the fins 21, so that the fins 21 and the inner wall of the drying cylinder 1 can achieve synchronous heat transfer efficiency.

[0047] The bottom of the drying cylinder 1 is provided with a feeding cylinder 3. The bottom surface of the inner cavity of the drying cylinder 1 is provided with a feeding port 103 that communicates with the feeding cylinder 3. The bottom surface of the inner cavity of the drying cylinder 1 is provided with a support frame 104. The bottom end of the feeding cylinder 3 is connected to a discharge pipe 102. The discharge pipe 102 allows the material entering the feeding cylinder 3 from the drying cylinder 1 through the feeding port 103 to be discharged and collected centrally under the action of the auger shaft 31.

[0048] Specifically, the drying cylinder 1 is equipped with a main shaft 4, and the end of the main shaft 4 is connected to a main motor 41 installed on the outside of the drying cylinder 1. The main shaft 4 is equipped with a mounting bracket 401. Under the drive of the output shaft of the main motor 41, the main shaft 4 can make the mounting bracket 401 rotate inside the drying cylinder 1.

[0049] Specifically, the mounting frame 401 is equipped with a tie rod 5. Both sides of the tie rod 5 are provided with balance bars 52 to provide balance for the tie rod 5 in conjunction with the mounting frame 401. The tie rod 5 is equipped with a rake blade 51 that is fitted onto the fins 21. The rake blade 51 has a slot 511 for fitting onto the fins 21. When the mounting frame 401 rotates, the rake blade 51, through the connection of the tie rod 5, acts on the material, allowing the material to move inside the drying cylinder 1. When the rake blade 51 adjusts its position according to the shape of the frame 2, the tie rod 5 can move relative to the mounting frame 401, ensuring that the bottom end of the rake blade 51 is always in contact with the inner surface of the drying cylinder 1, thus allowing it to act on the material. During the movement of the rake blade 51, the slot 511 allows the rake blade 51 to scrape off any adhering material on the surface of the fins 21, preventing the accumulation of adhering material and reducing the heat transfer efficiency of the fins 21.

[0050] Specifically, the bottom inner side of the slot 511 is provided with a guide post 512 that slides and fits with the guide groove 201. The bottom of the rake blade 51 is provided with a pusher plate 513 that contacts the inner side of the drying cylinder 1. The bottom middle part of the rake blade 51 contacts the surface of the support frame 104. Through the setting of the guide post 512, when the rake blade 51 moves inside the drying cylinder 1, the bottom end of the rake blade 51 can always contact the inner wall of the drying cylinder 1, and the position can be adjusted according to the shape of the frame 2 to adapt to the internal space of the drying cylinder 1. During the movement of the rake blade 51, the pusher plate 513 can cooperate with the rake blade 51 to push the material on the inner wall of the drying cylinder 1. The support frame 104 can cooperate with the guide post 512 and the discharge pipe 102 to provide a limiting function for the rake blade 51. During the process of the rake blade 51 stirring the material, the material can move laterally inside the drying cylinder 1 through the lowest end of the frame 2 to make the material evenly distributed inside the drying cylinder 1.

[0051] Specifically, a scraping mechanism 6 is movably fitted inside the tie rod 5. The scraping mechanism 6 includes an extension rod 601 that is movably embedded in the notch 511. The extension rod 601 is movably fitted with the tie rod 5. The top of the extension rod 601 is provided with a return spring 602 that is connected to the top of the inner cavity of the tie rod 5. By setting the return spring 602, the position of the extension rod 601 can be adjusted inside the tie rod 5.

[0052] Specifically, the bottom end of the extension rod 601 is provided with an adjustment block 603 that contacts the top surface of the fin 21. The adjustment block 603 is provided with a scraper 604 that contacts the side of the rake blade 51. Under the action of the fin 21, according to the change in the movement position of the rake blade 51 and the elastic pressure of the return spring 602 on the extension rod 601, the adjustment block 603 can always be in contact with the top of the fin 21. Furthermore, the change in the trajectory of the top of the fin 21 can adjust the position of the extension rod 601 inside the tie rod 5, so that the scraper 604 can be adjusted on the surface of the rake blade 51, allowing the scraper 604 to act on the adhering substances on the surface of the rake blade 51 to complete the cleaning operation of the adhering substances on the surface of the rake blade 51.

[0053] Specifically, the discharge port 103 is provided with an arc-shaped sealing plate 8, and the arc-shaped sealing plate 8 is provided with an arc-shaped toothed plate 81. According to the opening of the discharge port 103, the material inside the drying cylinder 1 can enter the interior of the discharge cylinder 3 through the discharge port 103. The arc-shaped sealing plate 8 can provide a sealing function for the discharge port 103.

[0054] Specifically, a transmission chamber 105 is provided inside the feeding cylinder 3, and an adjusting shaft 9 is rotatably installed inside the transmission chamber 105. The adjusting shaft 9 is equipped with a gear post 91 that meshes with the arc-shaped toothed plate 81. The end of the adjusting shaft 9 is connected to a synchronization box 10 installed on the outside of the drying cylinder 1. The synchronization box 10 is equipped with an adjusting motor 11 that drives the adjusting shaft 9 to rotate. When the adjusting motor 11 is turned on, its output shaft can drive the gear set inside the synchronization box 10 to adjust the adjusting shafts 9 located on both sides of the feeding cylinder 3 to rotate synchronously in opposite directions, so that the gear post 91 meshes with the arc-shaped toothed plate 81, so that the arc-shaped sealing plate 8 can open and close synchronously.

[0055] Specifically, the feeding cylinder 3 is equipped with an auger shaft 31, and the feeding cylinder 3 is equipped with a feeding motor 311 on the outside to drive the auger shaft 31 to rotate.

[0056] Example 2

[0057] Reference Figure 1-13 The difference between this embodiment and embodiment 1 is that the scraper 604 is provided with a straight toothed rack 605 at its end, and the rake blade 51 is provided with a stirring mechanism 7. The stirring mechanism 7 includes a rotating shaft 701 that is rotatably connected to the rake blade 51. When the adjusting block 603 drives the scraper 604 to move on the surface of the rake blade 51 according to the shape of the fin 21, the scraper 604 can drive the straight toothed rack 605 to move synchronously.

[0058] Specifically, the end of the rotating shaft 701 is provided with a spur gear 702 that meshes with the rack 605. The rotating shaft 701 is also provided with blades 703 for stirring the material. When the rack 605 moves, the spur gear 702 can mesh with it, so that the spur gear 702 can drive the rotating shaft 701 to rotate. Thus, when the rake blade 51 moves, the rotating shaft 701 can synchronously drive the blades 703 to act on the material, thereby improving the stirring efficiency of the material inside the drying cylinder 1 and improving the drying efficiency of the material.

[0059] Other undescribed structures are described in Example 1.

[0060] Example 3

[0061] Reference Figure 14 The difference between this embodiment and embodiment 1 is that a fluid cavity 211 is provided inside the fin 21. The fluid cavity 211 is connected to the inside of the jacket 100. By hollowing out the inside of the fin 21, the heat transfer liquid inside the jacket 100 can enter the inside of the fin 21 to cooperate with the heat transfer of the jacket 100 to the inner wall of the drying cylinder 1, thereby improving the heat transfer efficiency of drying inside the drying cylinder 1. Holes need to be opened on the surface of the drying cylinder 1 to allow the liquid flowing inside the jacket 100 to enter the fluid cavity 211. The liquid flowing inside the fluid cavity 211 will not enter the inside of the drying cylinder 1.

[0062] Other undescribed structures are described in Example 1.

[0063] Working principle: In this invention, the inside of the drying cylinder 1 is first vacuumed by an external vacuuming device. Then, the solid material after filtration is fed into the inside of the drying cylinder 1 through the feed pipe 101. Then, the output shaft of the main motor 41 is turned on to drive the main shaft 4 to rotate inside the drying cylinder 1. This allows the mounting frame 401 to drive the rake blade 51 to rotate inside the drying cylinder 1 through the tie rod 5, thereby allowing the rake blade 51 to stir and disperse the material inside the drying cylinder 1.

[0064] When the rake blade 51 rotates with the mounting frame 401 via the tie rod 5, the position of the rake blade 51 is adapted to the movement by the matching and limiting action of the guide post 512 and the guide groove 201, and simultaneously cleans the surface of the fin 21 through the slot 511, so that the adhering material will not affect the thickness of the fin 21 and avoid the situation of reducing the heat transfer efficiency of the fin 21.

[0065] As the rake blade 51 moves, the bottom end of the adjusting block 603 is always in contact with the top end of the fin 21, so that the extension rod 601 can be adjusted in position inside the tie rod 5. When the adjusting block 603 moves to the top of the fin 21 track, the return spring 602 is in a fully compressed state. When the adjusting block 603 is at the bottom of the fin 21 track, the return spring 602 is in a fully released state, so that the adjusting block 603 is always in contact with the top end of the fin 21.

[0066] When the adjusting block 603 moves back and forth following the shape of the fin 21, the scraper 604 can act on the surface of the rake blade 51 to clean the adhering substances on the surface of the rake blade 51, and simultaneously drive the straight toothed rack 605 to move back and forth.

[0067] When the rack 605 moves, the spur gear 702 can mesh with it, so that the spur gear 702 can drive the rotating shaft 701 to rotate, thereby allowing the blade 703 to assist the rake blade 51 in stirring the material during the stirring process, which plays a synergistic and synergistic role and improves the stirring efficiency of the material.

[0068] After the material inside the drying cylinder 1 has finished drying, the regulating motor 11 is turned on, so that the output shaft of the regulating motor 11, together with the gear set inside the synchronization box 10, drives the two regulating shafts 9 to rotate synchronously in opposite directions. This allows the gear column 91 to mesh with the arc-shaped toothed plate 81, thereby opening the arc-shaped sealing plate 8 to close the discharge port 103. Under the pushing and stirring action of the rake blade 51 and the blade 703, the opened discharge port 103 can accommodate the material to pass through, allowing the material to enter the interior of the discharge cylinder 3. When the arc-shaped sealing plate 8 is opened, the discharge motor 311 is turned on simultaneously to drive the auger shaft 31 to act on the material that has fallen into the interior of the discharge cylinder 3, and output the material through the discharge pipe 102 for centralized collection.

[0069] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0070] In this invention, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," "link," and "fix" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, a direct connection, or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0071] The control method of this invention is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art. The power supply is also common knowledge in the field. Furthermore, since this invention is mainly used to protect mechanical devices, the control method and circuit connection will not be explained in detail here.

[0072] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A refining system for the production of pyrifluquinazon technical grade, comprising a drying drum (1), characterized in that: The drying cylinder (1) is provided with a jacket (100) on the outside. The drying cylinder (1) is connected to a feed pipe (101). The jacket (100) is connected to a liquid inlet pipe (1001) and a liquid outlet pipe (1002). The drying cylinder (1) is provided with a frame (2). The frame (2) is provided with fins (21) on the inside. The frame (2) is provided with guide grooves (201) on both sides. The bottom end of the drying cylinder (1) is provided with a feeding cylinder (3), the bottom surface of the inner cavity of the drying cylinder (1) is provided with a feeding port (103) communicating with the feeding cylinder (3), the bottom surface of the inner cavity of the drying cylinder (1) is provided with a support frame (104), and the bottom end of the feeding cylinder (3) is connected to a discharge pipe (102). The drying cylinder (1) is provided with a main shaft (4), and the end of the main shaft (4) is connected to a main motor (41) installed on the outside of the drying cylinder (1). The main shaft (4) is provided with a mounting bracket (401). The mounting frame (401) is movably fitted with a tie rod (5). Both sides of the tie rod (5) are provided with balance bars (52) that cooperate with the mounting frame (401) to provide balance for the tie rod (5). The tie rod (5) is provided with a rake blade (51) that is fitted with the fin (21). The rake blade (51) is provided with a slot (511) for fitting with the fin (21).

2. The refining system for the production of pyrifluquinazon technical grade according to claim 1, characterized in that: The bottom of the inner side of the slot (511) is provided with a guide post (512) that slides with the guide groove (201), and the bottom of the rake blade (51) is provided with a pusher plate (513) that contacts the inner side of the drying cylinder (1). The bottom of the middle part of the rake blade (51) contacts the surface of the support frame (104).

3. The refining system for the production of pyrifluquinazon technical grade according to claim 1, characterized in that: The tie rod (5) is movably fitted with a scraping mechanism (6). The scraping mechanism (6) includes an extension rod (601) that is movably embedded in a notch (511). The extension rod (601) is movably fitted with the tie rod (5). The top end of the extension rod (601) is provided with a return spring (602) that is connected to the top of the inner cavity of the tie rod (5).

4. A refining system for the production of pyrifluquinazon technical grade according to claim 3, characterized in that: The bottom end of the extension rod (601) is provided with an adjustment block (603) that contacts the top surface of the fin (21), and the adjustment block (603) is provided with a scraper (604) that contacts the side of the rake blade (51).

5. A refining system for the production of pyrifluquinazon technical grade according to claim 1, characterized in that: The discharge port (103) is provided with an arc-shaped sealing plate (8) for opening and closing, and an arc-shaped toothed plate (81) is provided on the arc-shaped sealing plate (8).

6. A refining system for the production of pyrifluquinazon technical grade according to claim 5, characterized in that: The feeding cylinder (3) has a transmission chamber (105) inside, and an adjustment shaft (9) is rotatably installed inside the transmission chamber (105). The adjustment shaft (9) is equipped with a gear column (91) that meshes with the arc-shaped toothed plate (81). The end of the adjustment shaft (9) is connected to a synchronization box (10) installed on the outside of the drying cylinder (1). The synchronization box (10) is equipped with an adjustment motor (11) that drives the adjustment shaft (9) to rotate.

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