A raw material drying equipment for fertilizer production

Abstract

This invention relates to the field of fertilizer production equipment technology, and provides a raw material drying device for fertilizer production, including a frame, a drying cylinder, a heating component, and auxiliary components. The auxiliary components include a throwing plate, a connecting plate, a turntable, and a drive mechanism. A rotating component is installed inside the drying cylinder, and the rotating component includes a rotating shaft and multiple sets of agitators. The agitators include a first spur gear, a scissor mechanism, a plate, a flexible mesh, and a toothed roller. By setting up the frame, drying cylinder, heating component, and auxiliary components, and the auxiliary components including the throwing plate, connecting plate, turntable, and drive mechanism, the power component drives the drying cylinder to rotate, and the drying cylinder drives the auxiliary components to rotate. Some of the raw material at the bottom of the drying cylinder is pushed by the throwing plate and then moves upward with the throwing plate. The throwing plate then throws the raw material out, dispersing it and allowing for more thorough and uniform heating. Furthermore, the impact of the thrown material helps to break up clumps and expose the internal moisture of the clumps.

Description

Technical Field

[0001] This invention belongs to the technical field of fertilizer production equipment, and particularly relates to a raw material drying equipment for fertilizer production. Background Technology

[0002] Fertilizers are essential for supplying nutrients needed for crop growth and development, improving soil properties, and increasing crop yield and quality. The agricultural industry has a great demand for fertilizers.

[0003] During fertilizer production, some raw materials become damp and clump together, hindering subsequent production. Therefore, they need to be dried before proceeding to the next step. For example, Chinese patent CN213811506U discloses a raw material drying device for organic fertilizer production, relating to the field of organic fertilizer technology. This utility model includes a box body, baffles, and a deodorizing box. A feed pipe and a blower are fixedly connected to the upper surface of the box body. An air outlet pipe is fixedly connected to the lower surface of the blower, and a heating wire is installed on the lower surface of the air outlet pipe. A control box is located on the left side of the box body, and a discharge pipe is fixedly connected to the lower surface of the box body. A motor is fixedly connected to the right side of the box body, and a rotating shaft is fixedly connected to the left side of the motor. A stirring blade is fixedly connected to the circumference of the rotating shaft.

[0004] In the aforementioned prior art, by setting up a motor, rotating shaft and stirring blades, stirring is performed during the drying process, which helps with drying. Although a stirring structure is set up, under gravity, all the raw materials still pile up together at the bottom of the box. The dispersion effect of the piled raw materials during the stirring process is poor, and the space at the top of the box cannot be utilized. This is not conducive to the full and uniform heating of the raw materials and the loss of moisture.

[0005] Although some drum dryers are designed with lifting plates, after the lifting plates raise the raw materials to a certain height, the raw materials slide down under gravity. On the one hand, the raw materials slide down together to the fertilizer surface at the bottom of the drum. The movement path and time period result in a generally poor dispersion effect. On the other hand, the raw materials are subjected to relatively small forces, which is not conducive to breaking up agglomerated raw materials. Summary of the Invention

[0006] This invention provides a raw material drying device for fertilizer production, aiming to solve the above-mentioned problems.

[0007] This invention is implemented as follows: a raw material drying device for fertilizer production, comprising: a frame; a drying cylinder rotatably mounted on the frame, wherein a power assembly for driving the drying cylinder to rotate is mounted on the frame; a heating assembly for supplying heat to the drying cylinder to dry the raw materials; and multiple sets of auxiliary components circumferentially spaced within the drying cylinder, wherein the auxiliary components include: a throwing plate, one end of which is attached to the inner wall of the drying cylinder and can slide along the inner wall of the drying cylinder; a connecting plate hinged to the other end of the throwing plate, wherein a tension spring is fixed to the end of the connecting plate away from the throwing plate, and the tension spring is hinged to the end wall of the drying cylinder; a turntable disposed on the side of the throwing plate and the connecting plate, wherein the turntable is rotatably connected to the end wall of the drying cylinder, wherein a pin is eccentrically fixed on the turntable, and a movable groove for the pin to pass through and move on the throwing plate; and a drive mechanism for driving the turntable to rotate forward and backward.

[0008] Preferably, the heating assembly includes: a hot air blower fixed on the frame; a second air duct disposed in the side wall of the drying cylinder, the outlet of the hot air blower being connected to an air supply pipe, the air supply pipe being rotatably connected to one end of the drying cylinder, a first air duct communicating with the air supply pipe being disposed in the end wall of the drying cylinder, the first air duct communicating with the second air duct; an air cavity disposed in the connecting plate, the second air duct communicating with the air cavity through a flexible air pipe, and a plurality of air jet holes communicating with the air cavity being disposed on the side of the connecting plate away from the throwing plate.

[0009] Preferably, the drying cylinder end wall is provided with at least one air outlet mesh.

[0010] Preferably, a plurality of compression springs are fixed on the side of the connecting plate away from the throwing plate, and a plurality of spikes are fixed on the compression springs.

[0011] Preferably, the driving mechanism includes: a second spur gear coaxially fixed to each turntable, the second spur gear being located outside the drying cylinder; a third spur gear rotatably mounted on the end wall of the drying cylinder, the third spur gear being connected to the end wall of the drying cylinder by a torsion spring, the third spur gear meshing with the second spur gear; a mounting ring rotatably mounted on the frame and located outside the drying cylinder, the mounting ring being coaxially arranged with the drying cylinder, the inner sidewall of the mounting ring having an internal tooth segment, the internal tooth segment being located on the movement trajectory of the third spur gear and capable of meshing with the third spur gear; and a driving component for driving the mounting ring to rotate to adjust the position of the internal tooth segment.

[0012] Preferably, a rotating assembly is installed inside the drying cylinder, the rotating assembly comprising: a rotating shaft coaxially mounted inside the drying cylinder, one end of the rotating shaft being rotatably connected to the end wall of the drying cylinder, and the other end of the rotating shaft extending to the outside of the drying cylinder; multiple sets of agitators circumferentially spaced on the rotating shaft; and a power assembly driving the rotating shaft, wherein the rotation directions of the drying cylinder and the rotating shaft are opposite.

[0013] Preferably, the power assembly includes: a first stepper motor fixed on the frame, with a driving bevel gear fixed on the output shaft of the first stepper motor; and driven bevel gears fixed on the rotating shaft and the drying cylinder mounting shaft, with the two driven bevel gears located on both sides of the driving bevel gear and meshing with it.

[0014] Preferably, the agitator includes: two first spur gears rotatably mounted at the front and rear ends of the rotating shaft, the two first spur gears being coaxially fixed; a scissor mechanism connected between each first spur gear and the rotating shaft, one end of the scissor mechanism being eccentrically hinged to the end face of the corresponding first spur gear, and the other end of the scissor mechanism being hinged to the rotating shaft on the same side; multiple parallel and spaced plates connected between the two opposing scissor mechanisms, the plates being perpendicular to the extension and retraction direction of the scissor mechanisms, two cross-hinged rods in the scissor mechanisms, one rod having its ends hinged to two adjacent plates via hinge pins, and the other rod having its ends slidably connected to two adjacent plates via hinge pins; a flexible mesh fixedly connected between adjacent plates and between the outer wall of the rotating shaft and adjacent plates; a toothed roller coaxially inserted into the rotating shaft, the toothed roller being rotatably connected to the rotating shaft, all first spur gears surrounding and meshing with the toothed roller, the toothed roller being fixedly connected to the mounting shaft of the drying cylinder or driven to rotate by a motor fixed on the frame, the rotation direction being opposite to the rotation direction of the rotating shaft.

[0015] Compared with the prior art, the embodiments of this application have the following advantages: The raw material drying equipment for fertilizer production provided by the present invention is equipped with a frame, a drying cylinder, a heating component and an auxiliary component. The auxiliary component includes a throwing plate, a connecting plate, a turntable and a driving mechanism. The drying cylinder is driven to rotate by the power component, and the drying cylinder drives the auxiliary component to rotate. Some of the raw material at the bottom of the drying cylinder is pushed by the throwing plate and then moves upward with the throwing plate. Then the throwing plate throws the raw material on it. After the raw material is thrown out, it is dispersed and heated more fully and evenly. Moreover, the collision of the thrown material helps to break up the clumps of raw material and expose the internal moisture of the clumps. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a raw material drying equipment for fertilizer production provided by the present invention.

[0017] Figure 2 This is a side view of a raw material drying device for fertilizer production provided by the present invention.

[0018] Figure 3 This is a schematic diagram of the drive mechanism in a raw material drying equipment for fertilizer production provided by the present invention.

[0019] Figure 4 This is a schematic diagram of a rotary table, a throwing plate, and a connecting plate in a raw material drying device for fertilizer production provided by the present invention.

[0020] Figure 5 yes Figure 1 Enlarged view of point A in the image.

[0021] Figure 6 yes Figure 1 Enlarged view of point B in the image.

[0022] Figure 7 This is a schematic diagram of the structure of the stirring component in a raw material drying equipment for fertilizer production provided by the present invention.

[0023] Figure reference numerals: 1. Frame; 2. Drying cylinder; 3. Second air duct; 4. Flexible air pipe; 5. Arc-shaped chute; 6. Turntable; 7. Pin; 8. Throwing plate; 9. Connecting plate; 10. Tension spring; 11. Compression spring; 12. Flexible net; 13. Plate body; 14. Scissor mechanism; 15. First spur gear; 16. Air outlet mesh; 17. Toothed roller; 18. Rotating shaft; 19. Material inlet; 20. First stepper motor; 21. Driving bevel gear; 22. Driven bevel gear; 23. Second spur gear; 24. Third spur gear; 25. Torsion spring; 26. Hot air blower; 27. Mounting ring; 28. Internal gear section; 29. ​​External gear section; 30. Fourth spur gear. Detailed Implementation

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and foregoing drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or foregoing drawings of this application are used to distinguish different objects, not to describe a particular order.

[0025] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0026] This invention provides a raw material drying device for fertilizer production, such as... Figures 1-7As shown, it includes: a frame 1; a drying cylinder 2 rotatably mounted on the frame 1, the frame 1 being equipped with a power assembly for driving the drying cylinder 2 to rotate, the drying cylinder 2 having a feed inlet 19 for feeding and discharging materials, and a valve installed on the feed inlet 19; a heating assembly for supplying heat to the drying cylinder 2 to dry the raw materials; and multiple sets of auxiliary components circumferentially spaced within the drying cylinder 2, the auxiliary components including: a throwing plate 8, one end of which is attached to the inner wall of the drying cylinder 2 and can slide along the inner wall of the drying cylinder 2, and arc-shaped grooves 5 can be formed on the front and rear end walls of the drying cylinder 2, the throwing plate 8 having pins fixed to insert into the arc-shaped grooves 5; and a connecting plate 9 hinged to the other end of the throwing plate 8, preferably the length of the throwing plate 8 and the connecting plate 9 being equal to the length of the drying cylinder 2. The inner length of the drying cylinder 2 is such that a tension spring 10 is fixed to the end of the connecting plate 9 away from the throwing plate 8. The tension spring 10 is hinged to the end wall of the drying cylinder 2, and the tension spring 10 provides the connecting plate 9 with room for movement. A turntable 6 is located on the side of the throwing plate 8 and the connecting plate 9. The turntable 6 is rotatably connected to the end wall of the drying cylinder 2. Preferably, the end wall of the drying cylinder 2 has a receiving groove for accommodating the turntable 6. A pin 7 is eccentrically fixed on the turntable 6. The throwing plate 8 has a movable groove for the pin 7 to pass through and move. Preferably, two opposing turntables 6 are arranged on the front and rear sides of the throwing plate 8 and the connecting plate 9, and the pin 7 is eccentrically fixed between the two turntables 6. A drive mechanism is used to drive the turntable 6 to rotate forward and backward, for example, in the initial state... Figure 1 The preferred angle for the forward and reverse rotation of turntable 6 is 90 degrees.

[0027] During operation, an appropriate amount of raw material is added through the feed inlet 19. The power component drives the drying cylinder 2 to rotate, and the drying cylinder 2 drives the auxiliary components to rotate. Figure 1 As shown, some of the raw materials at the bottom of the drying cylinder 2 are pushed by the throwing plate 8 and then move upward with the throwing plate 8. When they move to the upper part of the inner cavity of the drying cylinder 2, the drive mechanism drives the turntable 6 to rotate clockwise. The turntable 6 drives the throwing plate 8 to rotate through the pin 7. The throwing plate 8 throws out the raw materials on it. Then the turntable 6 reverses and resets. After the raw materials are thrown out, they are dispersed and heated more fully and evenly. Moreover, the collision of the thrown materials helps to break up the clumps and expose the moisture inside the clumps.

[0028] The heating assembly includes: a hot air blower 26 fixed to the frame 1, which can be fixed with screws; a second air duct 3 located inside the side wall of the drying cylinder 2, the outlet of the hot air blower 26 being connected to an air supply pipe, the air supply pipe being rotatably connected to one end of the drying cylinder 2, which can be rotatably connected via a rotary joint, a first air duct connected to the air supply pipe being located inside the end wall of the drying cylinder 2, the first air duct being connected to the second air duct 3; and an air cavity located inside the connecting plate 9, the second air duct 3 being connected to the air cavity via a flexible air pipe 4, and multiple air jet holes connected to the air cavity being located on the side of the connecting plate 9 away from the throwing plate 8, with filters installed inside the air jet holes to prevent raw materials from falling into the air cavity.

[0029] During operation, the hot air blower 26 generates hot air, which enters the first air duct through the air supply pipe, then enters the second air duct 3, and enters the air chamber through the flexible air pipe 4 from the second air duct 3. The hot air is then sprayed out from the jet hole to dry the raw material. With the movement of the connecting plate 9, multi-directional jetting is carried out, resulting in a better drying effect.

[0030] Furthermore, at least one air outlet mesh 16 is provided on the end wall of the drying cylinder 2 to facilitate the discharge of water vapor. Of course, a gas purification device can also be connected to the air outlet mesh 16 through a pipe as needed, which will not be elaborated further.

[0031] Furthermore, multiple compression springs 11 are fixed on the side of the connecting plate 9 away from the throwing plate 8. Multiple spikes are fixed on the compression springs 11, which can be fixed by welding. When the throwing plate 8 throws out the raw material, some of the agglomerated raw material can collide with the compression springs 11 and spikes and be broken. During the movement of the compression springs 11 and spikes relative to the raw material in the lower part of the inner cavity of the drying cylinder 2, the compression springs 11 undergo irregular deformation and drive the spikes to move irregularly, which further helps the movement of the raw material and the breaking of agglomerated raw material, thereby improving the drying efficiency.

[0032] Specifically, the drive mechanism includes: a second spur gear 23 coaxially fixed to each turntable 6, the second spur gear 23 being located outside the drying cylinder 2; a third spur gear 24 rotatably mounted on the end wall of the drying cylinder 2, the third spur gear 24 being connected to the end wall of the drying cylinder 2 by a torsion spring 25, the third spur gear 24 meshing with the second spur gear 23; and a mounting ring 27 rotatably mounted on the frame 1 and located outside the drying cylinder 2, the mounting ring 27 being coaxially arranged with the drying cylinder 2, the inner side wall of the mounting ring 27 having an internal tooth section 28 located on the third spur gear. The wheel 24 moves along the trajectory and can mesh with the third spur gear 24; a driving component is used to drive the mounting ring 27 to rotate to adjust the position of the internal tooth segment 28. In this embodiment, the driving component includes a second stepper motor and a fourth spur gear 30. The second stepper motor is fixed on the frame 1 and can be fixed by bolts. The fourth spur gear 30 is fixed on the output shaft of the second stepper motor. The outer side wall of the mounting ring 27 is provided with an external tooth segment 29 that meshes with the fourth spur gear 30. Of course, the driving component can also be other structures, as long as it can drive the mounting ring 27 to rotate, without too many restrictions.

[0033] During operation, the drying drum 2 rotates, causing the third spur gear 24 to revolve. When the third spur gear 24 meshes with the internal gear segment 28, it rotates on its own axis. The third spur gear 24 drives the turntable 6 to rotate via the second spur gear 23. The turntable 6 drives the throwing plate 8 to rotate via the pin 7, scattering the material. When the drying drum 2 disengages the third spur gear 24 from the internal gear segment 28, the torsion spring 25 drives the third spur gear 24 to reset. The third spur gear 24 then drives the turntable 6 to reset via the second spur gear 23. The turntable 6 drives the throwing plate 8 to reset via the pin 7. The mounting ring 27 can be rotated via the driving component, which in turn drives the internal gear segment 28 to rotate, adjusting the position of the internal gear segment 28 and thus the scattering position.

[0034] In a specific implementation, a rotating assembly is installed inside the drying cylinder 2. The rotating assembly includes: a rotating shaft 18 coaxially mounted inside the drying cylinder 2, one end of which is rotatably connected to the end wall of the drying cylinder 2 via a bearing, and the other end of which extends to the outside of the drying cylinder 2; multiple sets of agitators are circumferentially spaced on the rotating shaft 18; and a power assembly drives the rotating shaft 18, with the drying cylinder 2 and the rotating shaft 18 rotating in opposite directions.

[0035] During operation, the rotating shaft 18 rotates, which drives the agitator to rotate, and the agitator can agitate the raw materials.

[0036] Preferably, the power assembly includes: a first stepper motor 20 fixed on the frame 1, with a driving bevel gear 21 fixed on the output shaft of the first stepper motor 20; and driven bevel gears 22 fixed on the rotating shaft 18 and the mounting shaft of the drying cylinder 2, with the two driven bevel gears 22 located on both sides of the driving bevel gear 21 and meshing with it.

[0037] The first stepper motor 20 drives the active bevel gear 21 to rotate, and the active bevel gear 21 drives the two driven bevel gears 22 to rotate in opposite directions, thereby causing the rotating shaft 18 and the drying drum 2 to rotate in opposite directions.

[0038] In this embodiment, the agitator includes: two first straight gears 15 rotatably mounted at the front and rear ends of the rotating shaft 18, the two first straight gears 15 being coaxially fixed; a scissor mechanism 14 connected between each first straight gear 15 and the rotating shaft 18, one end of the scissor mechanism 14 being eccentrically hinged to the end face of the corresponding first straight gear 15, and the other end of the scissor mechanism 14 being hinged to the rotating shaft 18 on the same side; and multiple parallel and spaced plates 13 connected between the two opposing scissor mechanisms 14, the plates 13 being perpendicular to the extension and retraction direction of the scissor mechanisms 14. Taking two cross-hinged rods in the scissor mechanism 14 as an example, one end of one rod is connected to two adjacent plates 13 by hinge pins. 3. A hinge is formed, and the two ends of the other rod are slidably connected to the two adjacent plates 13 by hinge pins. The sliding connection can be achieved by opening a sliding groove on the two adjacent plates 13 and inserting the hinge pin into the sliding groove. A flexible net 12 is fixedly connected between the adjacent plates 13 and between the outer wall of the rotating shaft 18 and the adjacent plates 13, and can be hooked by hooks. A toothed roller 17 is coaxially inserted into the rotating shaft 18. The toothed roller 17 is rotatably connected to the rotating shaft 18. All first spur gears 15 surround the outside of the toothed roller 17 and mesh with it. The toothed roller 17 is fixedly connected to the mounting shaft of the drying cylinder 2 or driven to rotate by a motor fixed on the frame 1, and the rotation direction is opposite to the rotation direction of the rotating shaft 18.

[0039] During operation, the power assembly drives the drying drum 2 and the rotating shaft 18 to rotate in opposite directions. The rotating shaft 18 drives the first spur gear 15, the scissor mechanism 14, and the plate 13 to move circumferentially. At the same time, the first spur gear 15 meshes with the toothed roller 17 and rotates in opposite directions. The first gear rotates on its own axis, and the first gear drives the scissor mechanism 14 to swing back and forth and extend and retract. This can stir and disperse the raw materials in the drying drum 2. During the process of the scissor mechanism 14 driving the filter screen to rotate, some raw materials are on the flexible mesh 12. Unclumped raw materials can pass through the mesh of the flexible mesh 12, while clumped raw materials remain on the flexible mesh 12. When the scissor mechanism 14 shortens, it drives the adjacent plate 13 to move closer. At the same time, the adjacent plate 13 has relative movement in the direction perpendicular to the extension and retraction of the scissor mechanism 14, which can squeeze and rub the clumped raw materials, which is more conducive to breaking up the clumped raw materials, thereby improving the drying efficiency.

[0040] In summary, this invention provides a raw material drying device for fertilizer production. Its working principle is as follows: A suitable amount of raw material is added through the feed inlet 19. The first stepper motor 20 drives the active bevel gear 21 to rotate. The active bevel gear 21 drives two driven bevel gears 22 to rotate in opposite directions, thus causing the rotating shaft 18 and the drying cylinder 2 to rotate in opposite directions. The drying cylinder 2 drives the auxiliary components to rotate. A portion of the raw material at the bottom of the drying cylinder 2 is pushed upwards by the throwing plate 8. When it reaches the upper part of the inner cavity of the drying cylinder 2, the third spur gear 24 moves to mesh with the internal gear section 28, causing the third spur gear 24 to rotate. The third spur gear 24 drives the turntable 6 to rotate via the second spur gear 23. The turntable 6 drives the throwing plate 8 to rotate via the pin shaft 7, scattering the material. After the drying cylinder 2 disengages the third spur gear 24 from the internal gear section 28, the torsion spring 25 drives the third spur gear 24 to reset. The third spur gear 24 drives the turntable 6 to reset via the second spur gear 23. The turntable 6 drives the throwing plate 8 to reset via the pin shaft 7. The hot air blower 26 generates hot air. The raw material enters the first air duct through the air supply pipe, then the second air duct 3, and from the second air duct 3 it enters the air chamber through the flexible air pipe 4. It is then sprayed out from the jet nozzle to dry the raw material. With the movement of the connecting plate 9, multi-directional jetting is carried out, resulting in better drying effect. At the same time, the rotating shaft 18 drives the first spur gear 15, the scissor mechanism 14 and the plate 13 to move circumferentially. Simultaneously, the first spur gear 15 meshes with the toothed roller 17 and rotates in the opposite direction. The first gear rotates on its own axis, and the first gear drives the scissor mechanism 14 to swing back and forth and extend and retract, which can play a stirring role for the raw material in the drying cylinder 2. At the same time, during the process of scattering and the scissor mechanism 14 driving the filter screen to rotate, some raw material is on the flexible screen 12. Unclumped raw material can pass through the mesh of the flexible screen 12, while clumped raw material remains on the flexible screen 12. When the scissor mechanism 14 shortens, it drives the adjacent plate 13 to move closer and in the opposite direction. The direction of movement is perpendicular to the extension and retraction direction of the scissor mechanism 14, which can squeeze and rub the clumped raw material, which is more conducive to breaking up the clumped raw material, thereby improving the drying efficiency.

[0041] It should be noted that, for the sake of simplicity, the foregoing embodiments are all described as a series of actions. However, those skilled in the art should understand that the present invention is not limited to the described order of actions, as some steps may be performed in other orders or simultaneously according to the present invention. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are preferred embodiments, and the actions and modules involved are not necessarily essential to the present invention.

[0042] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit the scope of protection of the invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on these embodiments, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art can still combine, add, delete, or otherwise adjust the features of the various embodiments of the present invention according to the circumstances without conflict or creative effort, thereby obtaining different technical solutions that do not fundamentally depart from the concept of the present invention. These technical solutions also fall within the scope of protection of the present invention.

Claims

1. A raw material drying device for fertilizer production, comprising: frame; A drying drum is rotatably mounted on a frame, the frame being equipped with a power assembly for driving the drying drum to rotate; a heating assembly for supplying heat to the drying drum to dry the raw materials; characterized in that it further includes multiple sets of auxiliary components circumferentially spaced inside the drying drum, the auxiliary components including: a blasting plate, one end of which is attached to the inner wall of the drying drum and can slide along the inner wall of the drying drum; a connecting plate hinged to the other end of the blasting plate, the end of the connecting plate away from the blasting plate being fixed with a tension spring, the tension spring being hinged to the end wall of the drying drum; a turntable disposed on the side of the blasting plate and the connecting plate, the turntable being rotatably connected to the end wall of the drying drum, a pin being eccentrically fixed on the turntable, and a movable groove for the pin to pass through and move on the blasting plate; a drive mechanism for driving the turntable to rotate forward and backward.

2. The raw material drying equipment for fertilizer production as described in claim 1, characterized in that, The heating assembly includes: a hot air blower fixed on the frame; a second air duct located inside the side wall of the drying cylinder, wherein the outlet of the hot air blower is connected to an air supply pipe, the air supply pipe is rotatably connected to one end of the drying cylinder, a first air duct connected to the air supply pipe is located inside the end wall of the drying cylinder, and the first air duct is connected to the second air duct; and an air cavity located inside a connecting plate, wherein the second air duct is connected to the air cavity via a flexible air pipe, and a plurality of air jet holes connected to the air cavity are located on the side of the connecting plate away from the throwing plate.

3. The raw material drying equipment for fertilizer production as described in claim 2, characterized in that, The drying cylinder has at least one air outlet mesh on its end wall.

4. The raw material drying equipment for fertilizer production as described in claim 1, characterized in that, Multiple compression springs are fixed to the side of the connecting plate away from the throwing plate, and multiple spikes are fixed to the compression springs.

5. The raw material drying equipment for fertilizer production as described in claim 1, characterized in that, The drive mechanism includes: a second spur gear coaxially fixed to each turntable, the second spur gear being located outside the drying cylinder; a third spur gear rotatably mounted on the end wall of the drying cylinder, the third spur gear being connected to the end wall of the drying cylinder by a torsion spring, the third spur gear meshing with the second spur gear; a mounting ring rotatably mounted on the frame and located outside the drying cylinder, the mounting ring being coaxially arranged with the drying cylinder, the inner side wall of the mounting ring having an internal tooth segment, the internal tooth segment being located on the movement trajectory of the third spur gear and capable of meshing with the third spur gear; and a drive component for driving the mounting ring to rotate to adjust the position of the internal tooth segment.

6. The raw material drying equipment for fertilizer production as described in claim 1, characterized in that, The drying cylinder is equipped with a rotating assembly, which includes: a rotating shaft coaxially mounted inside the drying cylinder, one end of which is rotatably connected to the end wall of the drying cylinder, and the other end of which extends to the outside of the drying cylinder; multiple sets of agitators circumferentially spaced on the rotating shaft; and a power assembly driving the rotating shaft, wherein the drying cylinder and the rotating shaft rotate in opposite directions.

7. The raw material drying equipment for fertilizer production as described in claim 6, characterized in that, The power assembly includes: a first stepper motor fixed on the frame, with a driving bevel gear fixed on the output shaft of the first stepper motor; and driven bevel gears fixed on the rotating shaft and the drying cylinder mounting shaft, with the two driven bevel gears located on both sides of the driving bevel gear and meshing with it.

8. The raw material drying equipment for fertilizer production as described in claim 6, characterized in that, The agitator includes: four sets of first spur gears rotatably mounted at both ends of the rotating shaft, each set including two first spur gears fixed coaxially; a scissor mechanism connecting each first spur gear and the rotating shaft, wherein one end of the scissor mechanism is eccentrically hinged to the end face of the corresponding first spur gear, and the other end of the scissor mechanism on the same side is hinged to the rotating shaft; multiple parallel and spaced plates connecting the two opposing scissor mechanisms, the plates being perpendicular to the extension and retraction direction of the scissor mechanisms; two cross-hinged rods in the scissor mechanisms, one rod having its two ends hinged to two adjacent plates via hinge pins, and the other rod having its two ends slidably connected to two adjacent plates via hinge pins; and a flexible mesh fixedly connected between adjacent plates and between the outer wall of the rotating shaft and adjacent plates. A toothed roller is coaxially inserted into the rotating shaft. The toothed roller is rotatably connected to the rotating shaft. Four sets of first spur gears are symmetrically arranged at both ends of the rotating shaft and mesh with the toothed roller along its outer circumference. The toothed roller is fixedly connected to the mounting shaft of the drying cylinder or is driven to rotate by a motor fixed on the frame, and the rotation direction is opposite to the rotation direction of the rotating shaft.

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