Water-soluble polymorphic nitrogen fertilizer mixing, stirring, wrapping and granulating device and method

Abstract

The invention discloses a water-soluble polymorphic nitrogen fertilizer mixing, stirring, wrapping and granulating device and method, and belongs to the technical field of water-soluble polymorphic nitrogen fertilizer production. The device comprises a stirring assembly, a conveying assembly and a wrapping and granulating assembly, the wrapping and granulating assembly comprises a supporting frame, the supporting frame is rotationally connected with a rotating cylinder, a mixing assembly is installed in the rotating cylinder, the mixing assembly comprises a fixing plate fixedly installed on the supporting frame, the fixing plate is rotationally connected with a control cylinder in a penetrating mode, and the control cylinder is connected with the conveying assembly. A power assembly is fixedly installed on the supporting frame. In the process of mixing, stirring, wrapping and granulating the water-soluble polymorphic nitrogen fertilizer, the mixing and stirring effect on materials in the rotating cylinder can be better improved, the mixing and stirring speed of the materials in the rotating cylinder is increased, the processing time is saved, and meanwhile, the processing effect is better.

Description

Technical Field

[0001] This invention relates to the field of water-soluble polymorphic nitrogen fertilizer production technology, and in particular to a device and method for mixing, stirring, coating and granulating water-soluble polymorphic nitrogen fertilizer. Background Technology

[0002] Water-soluble multi-component nitrogen fertilizer is a compound fertilizer that can be completely dissolved in water. Its core characteristics include rapid dissolution, high absorption rate, and environmental friendliness. Water-soluble multi-component nitrogen fertilizer achieves precise fertilization through fertigation technology, and is particularly suitable for modern agricultural facilities such as drip irrigation and sprinkler irrigation. It can significantly improve fertilizer utilization and reduce resource waste. In the production process of water-soluble multi-component nitrogen fertilizer, mixing and granulation are among the most important processing steps. During the mixing and granulation process, the corresponding raw materials are poured into the device, and the mixing and granulation operation begins. The overall operation is simple.

[0003] However, in the actual processing, during the mixing, stirring, and granulation process, only the processing drum rotates, resulting in low overall mixing efficiency and a long processing time. Furthermore, some larger pieces of material remain during processing (these are mainly due to poor initial processing precision and material agglomeration during the initial stages of material addition). Since there is no corresponding processing device for these larger pieces, the only way to reduce their quantity is to extend the processing time. Finally, some other unprocessable materials (such as stones, also due to poor initial processing precision) remain during processing. The failure to process these materials significantly reduces the yield rate of water-soluble polymorphic nitrogen fertilizer. Therefore, this paper proposes a mixing, stirring, granulation device and method for water-soluble polymorphic nitrogen fertilizer. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a device and method for mixing, stirring, coating, and granulating water-soluble polymorphic nitrogen fertilizers.

[0005] The present invention adopts the following technical solution:

[0006] A water-soluble multi-form nitrogen fertilizer mixing, stirring, coating, and granulation device includes a stirring component, a transport component, and a granulation component. The granulation component includes a support frame, a rotating cylinder rotatably connected to the support frame, a mixing component installed inside the rotating cylinder, and a fixed plate fixedly mounted on the support frame. A control cylinder is rotatably connected to the fixed plate. A power component is fixedly mounted on the support frame. A reciprocating screw is slidably connected to the control cylinder. A stirring shaft is fixedly connected to the reciprocating screw. A reciprocating screw cylinder is threadedly connected to the reciprocating screw. The reciprocating screw cylinder is fixedly connected to the support frame via a first connecting rod. A stirring cylinder is fixedly connected to the stirring shaft. A sliding plate is slidably connected to the stirring cylinder. A first tension spring is fixedly connected between the sliding plate and the stirring cylinder. A rotating plate is rotatably connected to the sliding plate. A first torsion spring is fixedly connected between the rotating plate and the sliding plate. A stirring rod is fixedly connected to the rotating plate. A stirring plate is fixedly connected to the stirring rod.

[0007] Preferably, the power assembly includes a rotating motor fixedly mounted on the side wall of the support frame, a rotating shaft fixedly connected to the output end of the rotating motor, a first gear and a second gear fixedly connected to the rotating shaft, a gear ring fixedly connected to the rotating cylinder, the gear ring meshing with the first gear, a rotating feed plate rotatably connected to the rotating cylinder, the rotating feed plate being fixedly connected to the support frame, a third gear fixedly connected to the control cylinder, and a fourth gear rotatably connected to the fixed plate, the fourth gear meshing with both the third and second gears.

[0008] Preferably, an extrusion assembly is installed inside the rotating cylinder. The extrusion assembly includes a limiting plate fixedly installed on the side wall of the rotating feed plate. The limiting plate is rotatably connected to an extrusion shaft. The extrusion shaft is fixedly connected to a fifth gear. The stirring shaft is rotatably connected to a rotating ring. The rotating ring is fixedly connected to a vertical plate. The vertical plate is fixedly connected to a fifth rack via a second connecting rod. The fifth rack and the limiting plate are slidably connected, and the fifth rack and the fifth gear mesh. The extrusion shaft is threadedly connected to a threaded rod. The threaded rod is slidably connected to the limiting plate. The threaded rod is fixedly connected to an extrusion frame. The extrusion frame is fixedly connected to an extrusion plate.

[0009] Preferably, the sidewall of the extrusion plate is fixedly connected with a plurality of protrusions, and the sidewall of the stirring plate is fixedly connected with an arc-shaped rod.

[0010] Preferably, a filter assembly is installed inside the rotating cylinder. The filter assembly includes a filter groove on the side wall of the rotating cylinder. Two filter plates are slidably connected inside the filter groove. A second tension spring is fixedly connected between the two filter plates and the side wall of the filter groove. A square rod is fixedly connected to the upper side of each of the two filter plates. A round rod is fixedly connected to the upper side of each square rod. Two control rings are symmetrically rotatably connected to the outer side of the stirring shaft. Two control rods are symmetrically fixedly connected to the outer side of each of the two control rings. The control rods are located below the limiting plate and are slidably connected to the limiting plate.

[0011] Preferably, multiple shock-absorbing pads are fixedly connected to the lower side of the support frame, transport frame, and bracket.

[0012] Preferably, the lower end face of the extrusion plate is arc-shaped, and the outer side of the extrusion plate has multiple recesses.

[0013] Preferably, a plurality of unblocking rods are slidably connected inside the rotating feed plate, and an unblocking plate is fixedly connected to the outer side of the plurality of unblocking rods. The unblocking plate and the stirring shaft are rotatably connected.

[0014] A method for mixing, stirring, coating, and granulating water-soluble multi-form nitrogen fertilizer includes the following steps:

[0015] S1. Raw material preparation: Prepare nitrate nitrogen source, ammonium nitrogen source, amide nitrogen source, and additives;

[0016] S2. Raw material coarse treatment: grinding nitrate nitrogen source and ammonium nitrogen source into powder;

[0017] S3. Mixing and stirring: The processed nitrate nitrogen powder and ammonium nitrogen powder are precisely measured according to the formula ratio and added to the stirring component. They are then vigorously stirred and mixed to form a uniform powder mixture.

[0018] S4. Granulation: The mixed powder mixture is transported to the granulation unit through the transport component to form a viscous and uniform slurry. This slurry is then passed through a spray granulation tower to produce small particles with rounded shape, good solubility, and moderate strength.

[0019] S5. Cooling and screening: The small particles are cooled by passing them through a cooling drum, and the cooled particles are then graded and screened by a vibrating screen.

[0020] S6. Packaging: Different grades of small particles are packaged separately to complete the production of water-soluble polymorphic nitrogen fertilizer.

[0021] The beneficial effects of this invention are:

[0022] 1. First, during the mixing, stirring, and granulation process of water-soluble polymorphic nitrogen fertilizer, not only is the rotating drum rotating, but the stirring plate also rotates. In this process, the stirring plate and the rotating drum rotate in opposite directions, which can greatly accelerate the mixing rate of materials inside the rotating drum. At the same time, the stirring drum, stirring rod, and stirring plate move back and forth relative to the rotating drum, which can better improve the mixing effect of materials inside the rotating drum, accelerate the mixing rate of materials inside the rotating drum, save processing time, and achieve better processing results.

[0023] 2. Secondly, during the processing, the up-and-down moving extrusion plates will come into contact with these larger raw materials, forming a crushing effect on these larger raw materials, reducing them in size, and ultimately improving the mixing quality.

[0024] 3. At the same time, the up-and-down moving extrusion plate will also cause the angle between the mixing plate and the rotating cylinder to change (that is, the mixing plate will deflect relative to the rotating cylinder). The deflected mixing plate will cause the material inside the rotating cylinder to move laterally, making the material inside the rotating cylinder more evenly distributed, thereby further improving the mixing effect.

[0025] 4. Finally, during the processing, under the action of the control rod and the round rod, large particles and unmixable substances in the rotating cylinder will be moved into the filter tank as much as possible, thereby completing the separation operation of large particles and unmixable substances. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of a water-soluble polymorphic nitrogen fertilizer mixing, stirring, coating and granulation device proposed in this invention;

[0027] Figure 2 This is a schematic diagram of the mixing and conveying components in a water-soluble polymorphic nitrogen fertilizer mixing, stirring, coating, and granulation device proposed in this invention;

[0028] Figure 3 This is a schematic diagram of the granulation component in a water-soluble multi-form nitrogen fertilizer mixing, stirring, and granulation device proposed in this invention.

[0029] Figure 4 This is a top view of the granulation component in a water-soluble multi-state nitrogen fertilizer mixing, stirring, and granulation device proposed in this invention.

[0030] Figure 5 for Figure 4 Enlarged view of the structure at point A in the middle;

[0031] Figure 6 This is a cross-sectional view of the rotating cylinder in a water-soluble polymorphic nitrogen fertilizer mixing, stirring, coating, and granulation device proposed in this invention.

[0032] Figure 7 This is a cross-sectional view of the stirring cylinder in a water-soluble polymorphic nitrogen fertilizer mixing, stirring, coating, and granulation device proposed in this invention.

[0033] Figure 8 This is a schematic diagram showing the connection between the stirring shaft and the limiting plate in a water-soluble polymorphic nitrogen fertilizer mixing, stirring, coating and granulation device proposed in this invention;

[0034] Figure 9 This is a schematic diagram showing the connection of the stirring shaft and the limiting plate at another angle in a water-soluble multi-state nitrogen fertilizer mixing, stirring, coating and granulation device proposed in this invention.

[0035] Figure 10 This is a schematic diagram showing the connection between the stirring shaft and the filter plate in a water-soluble polymorphic nitrogen fertilizer mixing, stirring, coating and granulation device proposed in this invention;

[0036] Figure 11 for Figure 10 Enlarged view of the structure at point B;

[0037] Figure 12 This is a cross-sectional schematic diagram of the rotating feed plate in a water-soluble polymorphic nitrogen fertilizer mixing, stirring, coating, and granulation device proposed in this invention.

[0038] In the diagram: 1. Mixing assembly, 2. Transport assembly, 3. Granulation assembly, 4. Support frame, 5. Rotating motor, 6. Rotating shaft, 7. First gear, 8. Second gear, 9. Rotating feed plate, 10. Gear ring, 11. Rotating cylinder, 12. Fourth gear, 13. Control cylinder, 14. Fixing plate, 15. Third gear, 16. Reciprocating screw, 17. Reciprocating screw cylinder, 18. Mixing shaft, 19. Mixing cylinder, 20. Mixing plate, 21. Rotating ring, 22. Mixing rod, 23. Rotating plate, 24. First torsion spring, 25. Slide plate, 26. First tension spring, 27. Vertical plate, 28. Limiting plate, 29. Extrusion shaft, 30. Fifth gear, 31. Fifth rack, 32. Threaded rod, 33. Extrusion frame, 34. Extrusion plate, 35. Protrusion, 36. Control ring, 37. Control rod, 38. Arc rod, 39. Round rod, 40. Filter plate, 41. Second tension spring, 42. Square rod. Detailed Implementation

[0039] See Figures 1-12 A water-soluble multi-form nitrogen fertilizer mixing, stirring, coating and granulation device, comprising a stirring component 1, a transport component 2 and a coating and granulation component 3;

[0040] First, the mixing assembly 1 includes a support frame, with a mixing motor and a mixing box fixedly connected to the upper side of the support frame. A stirrer is rotatably connected inside the mixing box, and the output end of the stirrer and the stirring motor are fixedly connected. Multiple stirring tilting rods are fixedly connected to the outside of the stirrer. The transport assembly 2 includes a transport frame, with a transport motor fixedly connected to the upper side of the transport frame. Multiple transport shafts are fixedly connected inside the transport frame, with one of the transport shafts fixedly connected to the output end of the transport motor. A transport belt is connected to the outside of the multiple transport shafts for common transmission. Multiple blocks that restrict the movement trajectory of the transport belt are also fixedly connected to the transport frame, and the blocks abut against the transport belt.

[0041] When processing water-soluble polymorphic nitrogen fertilizer, the corresponding raw materials are first placed into the mixing tank, and the stirring motor and conveyor motor are started. The stirring motor drives the agitator to rotate, and the agitator drives the stirring tilting rod to rotate, so that the fixed raw materials in the mixing tank can be better mixed together. After a period of time, the mixed raw materials are discharged and fall onto the conveyor belt. The conveyor belt can transport the mixed raw materials to the granulation component 3 and start the granulation operation. After a period of time, the processed material is taken out and then subjected to subsequent cooling and screening operations to finally complete the processing of water-soluble polymorphic nitrogen fertilizer. The above are all existing technologies.

[0042] The granulation assembly 3 includes a support frame 4, a rotating cylinder 11 rotatably connected to the support frame 4, a mixing assembly installed inside the rotating cylinder 11, and a fixing plate 14 fixedly mounted on the support frame 4. A control cylinder 13 is rotatably connected to the fixing plate 14. A power assembly is fixedly mounted on the support frame 4. A reciprocating screw 16 is slidably connected to the control cylinder 13. A stirring shaft 18 is fixedly connected to the reciprocating screw 16. A reciprocating screw cylinder 17 is threadedly connected to the reciprocating screw 16 and fixedly connected to the support frame 4 via a first connecting rod. A stirring cylinder 19 is fixedly connected to the stirring shaft 18. A sliding plate 25 is slidably connected to the stirring cylinder 19. A first tension spring 26 is fixedly connected between the sliding plate 25 and the stirring cylinder 19. The rotating plate 25 is rotatably connected to the sliding plate 2. 3. A first torsion spring 24 is fixedly connected between the rotating plate 23 and the sliding plate 25. A stirring rod 22 is fixedly connected to the rotating plate 23. A stirring plate 20 is fixedly connected to the stirring rod 22. The power assembly includes a rotating motor 5 fixedly installed on the side wall of the support frame 4. A rotating shaft 6 is fixedly connected to the output end of the rotating motor 5. A first gear 7 and a second gear 8 are fixedly connected to the rotating shaft 6. A gear ring 10 is fixedly connected to the rotating cylinder 11. The gear ring 10 meshes with the first gear 7. A rotating feed plate 9 is rotatably connected to the rotating cylinder 11. The rotating feed plate 9 is fixedly connected to the support frame 4. A third gear 15 is fixedly connected to the control cylinder 13. A fourth gear 12 is rotatably connected to the fixed plate 14. The fourth gear 12 meshes with both the third gear 15 and the second gear 8.

[0043] First, in the process of processing water-soluble polymorphic nitrogen fertilizer, the material transported by the conveyor belt enters the rotating drum 11 through the rotating feed plate 9. Then, other appropriate amounts of raw materials (mainly molten urea liquid) are poured into the rotating drum 11 through the rotating feed plate 9. The rotating motor 5 is started, and the rotating motor 5 drives the rotating shaft 6 to rotate. The rotating shaft 6 drives the rotating drum 11 to rotate through the first gear 7 and the gear ring 10, so that the material in the rotating drum 11 is fully mixed and stirred. In this process, the rotating shaft 6 also drives the control drum 13 to rotate through the second gear 8, the fourth gear 12 and the third gear 15. The control drum 13 drives the reciprocating screw 16 and the stirring shaft 18 to rotate. The stirring shaft 18 drives the stirring drum 19, the stirring rod 22 and the stirring plate 20 to rotate. During this process, the stirring plate 20 and the rotating cylinder 11 rotate in opposite directions, which can greatly accelerate the mixing rate of materials inside the rotating cylinder 11. At the same time, under the action of the reciprocating screw 16 and the reciprocating screw drum 17, while the reciprocating screw 16 rotates with the control cylinder 13, the reciprocating screw 16 also moves back and forth relative to the control cylinder 13. The reciprocating screw 16 drives the stirring cylinder 19, the stirring rod 22 and the stirring plate 20 to move back and forth relative to the control cylinder 13 through the stirring shaft 18. At this time, the stirring cylinder 19, the stirring rod 22 and the stirring plate 20 move back and forth relative to the rotating cylinder 11, which can better improve the mixing effect of materials inside the rotating cylinder 11, accelerate the mixing rate of materials inside the rotating cylinder 11, save processing time and achieve better processing results.

[0044] An extrusion assembly is installed inside the rotating cylinder 11. The extrusion assembly includes a limiting plate 28 fixedly installed on the side wall of the rotating feed plate 9. Multiple extrusion shafts 29 are rotatably connected to the lower side of the limiting plate 28. The multiple extrusion shafts 29 and the mixing cylinder 19 are arranged in an alternating pattern. A fifth gear 30 is fixedly connected to the outer side of each extrusion shaft 29. A rotating ring 21 is rotatably connected to the outer side of the mixing shaft 18. A vertical plate 27 is fixedly connected to the outer side of the rotating ring 21. A fifth rack 31 is fixedly connected to the vertical plate 27 via a second connecting rod. The fifth rack 31 and the limiting plate 28 are slidably connected, and the fifth rack 31 and the fifth gear 30 mesh. A threaded rod 32 is threaded through the extrusion shaft 29. The threaded rod 32 is slidably connected to the limiting plate 28. An extrusion frame 33 is fixedly connected to the lower side of the threaded rod 32. An extrusion plate 34 is fixedly connected to the lower side of the extrusion frame 33. The lower end face of the extrusion plate 34 is arc-shaped, and multiple recesses are formed on the outer side of the extrusion plate 34. Figure 9 From the perspective of the extrusion plate 34, the recess is located on the lower arc surface of the extrusion plate 34. During the mixing process, when larger pieces of raw material come into contact with the extrusion plate 34, they will enter the recess. Under the restriction of the recess, the larger pieces of raw material can be prevented from "slipping away" from the extrusion plate 34, and these larger pieces of raw material can be crushed and destroyed.

[0045] First, the fifth gear 31 and the limiting plate 28 are slidably connected, so as to Figure 8 From a certain perspective, a groove is provided on the lower side of the limiting plate 28, and a sliding rod is slidably connected in the groove. The sliding rod is fixedly connected to the limiting plate. Then, during the stirring process of the stirring plate 20, there will be a certain gap between the stirring plate 20 and the rotating cylinder 11, and the limiting plate 28, the fifth gear 30, and the fifth rack 31 are all located within this gap. Therefore, there will be no motion interference during the rotation of the rotating cylinder 11 and the stirring plate 20. Secondly, during the movement of the stirring shaft 18, it will drive the rotating ring 21 and the vertical plate 27 to move back and forth. The vertical plate 27 drives the fifth rack 31 to move back and forth through the second connecting rod. The fifth rack 31 drives the extrusion shaft 29 to rotate back and forth. Since the extrusion shaft 29 and the threaded rod 3 2 is a threaded connection, and the threaded rod 32 and the limiting plate 28 are slidably connected. Therefore, the rotating extrusion shaft 29 will drive the threaded rod 32 to move up and down relative to the limiting plate 28. The threaded rod 32 will drive the extrusion frame 33 and the extrusion plate 34 to move up and down as a whole. During the up and down movement of the extrusion plate 34, the extrusion plate 34 can abut against the bottom of the rotating cylinder 11. During the mixing process, if some raw materials are still in a large block shape after a long mixing process, the larger raw materials are heavier and will accumulate on the lower side of the rotating cylinder 11. Therefore, the up and down moving extrusion plate 34 will abut against these larger raw materials, forming a crushing effect on these larger raw materials, reducing them in size, and ultimately improving the mixing quality.

[0046] The side wall of the extrusion plate 34 is fixedly connected with multiple protrusions 35, and the side wall of the stirring plate 20 is fixedly connected with an arc-shaped rod 38.

[0047] During the up-and-down movement of the extrusion plate 34, the arc-shaped rod 38 and the stirring plate 20 rotate as a whole, and also move back and forth. Figure 8 and Figure 9 The above only represents the initial state of the mixing plate 20 and the extrusion plate 34. During the operation of the entire device, when the mixing plate 20 rotates and moves back and forth, it will move towards and away from the extrusion plate 34. When the protrusion 35 on the outer side of the extrusion plate 34 and the arc-shaped rod 38 on the outer side of the mixing plate 20 come into contact, the resistance of the protrusion 35 will cause the mixing plate 20 and the arc-shaped rod 38 to rotate around the mixing cylinder 19, which will cause the angle between the mixing plate 20 and the mixing cylinder 19 to change (that is, the mixing plate 20 will deflect relative to the rotating cylinder 11). Since the mixing plate 20 is still in a rotating and moving state at this time, during the mixing of raw materials, the deflected mixing plate 20 will cause the material inside the rotating cylinder 11 to move laterally, making the material inside the rotating cylinder 11 more evenly distributed, thereby further improving the mixing effect.

[0048] During the above process, when the stirring plate 20 does not deflect, the stirring plate 20 and the rotating feed plate 9 rotate in parallel. Although the back-and-forth movement of the stirring plate 20 will also cause the material inside the rotating cylinder 11 to move, the parallel rotation of the stirring plate 20 and the rotating feed plate 9 will only push the material, and the material will not flow along the stirring plate 20. However, when the stirring plate 20 deflects, the material will flow along the stirring plate 20, which will result in a more uniform distribution of the material inside the rotating cylinder 11 and improve the stirring effect.

[0049] A filter assembly is installed inside the rotating cylinder 11. The filter assembly includes a filter groove on the side wall of the rotating cylinder 11. Two filter plates 40 are slidably connected inside the filter groove. A second tension spring 41 is fixedly connected between the two filter plates 40 and the side wall of the filter groove. A square rod 42 is fixedly connected to the upper side of each of the two filter plates 40. A round rod 39 is fixedly connected to the upper side of the square rod 42. Two control rings 36 are symmetrically rotatably connected to the outer side of the stirring shaft 18. Two control rods 37 are symmetrically fixedly connected to the outer side of each of the two control rings 36. The control rods 37 are located below the limiting plate 28 and are slidably connected to the limiting plate 28.

[0050] During the reciprocating movement of the stirring shaft 18, the stirring shaft 18 drives the control ring 36 and control rod 37 to move back and forth as a whole. When the control rod 37 moves to the outside of the round rod 39 and is opposite to the round rod 39, the reciprocating control rod 37 and the round rod 39 abut against each other, causing the round rod 39 to move relative to the rotating cylinder 11. The round rod 39 drives the filter plate 40 to move, causing the second tension spring 41 to deform, creating a gap between the filter plate 40 and the filter tank. This allows the material accumulated at the bottom of the rotating cylinder 11 to enter the filter tank through this gap. When the control rod 37 and the round rod 39 are disconnected, the second tension spring 41 causes the filter plate 40 to return to its original position relative to the filter tank, and the filter tank is closed. During the above-mentioned operation, due to the control ring... 36 moves back and forth with the stirring shaft 18. Therefore, at most one control rod 37 and round rod 39 can abut against each other at the same time. During the rotation of the rotating drum 11, the control rod 37 will abut against the round rod 39 only when the filter tank is located at the bottom. As the rotating drum 11 continues to rotate, the material in the filter tank will flow out of the filter tank. However, large particles and substances that cannot be mixed will remain in the filter tank, thus completing the separation operation of large particles and substances that cannot be mixed. Finally, when the material is taken out from the rotating drum 11, the filter tank is rotated to the top so that the material will not be retained in the filter tank. Users can mark the side wall of the rotating drum 11 corresponding to the filter tank in advance to facilitate the final identification of whether the filter tank is at the top or the bottom.

[0051] Furthermore, during this process, the back-and-forth movement of the filter plate 40 will also cause the material inside the rotating cylinder 11 to move, which can further promote the mixing effect of the material.

[0052] Multiple shock-absorbing pads are fixedly connected to the lower side of the support frame 4, transport frame and bracket;

[0053] Improve the overall stability of the device.

[0054] like Figure 12 As shown, multiple unblocking rods are slidably connected inside the rotating feed plate 9. A unblocking plate is fixedly connected to the outside of the multiple unblocking rods. The unblocking plate and the stirring shaft 18 are rotatably connected. Due to the special motion state of the stirring shaft 18, the stirring shaft 18 both rotates and moves. However, since the stirring shaft 18 and the unblocking plate are rotatably connected, the stirring shaft 18 will drive the unblocking plate to move. The unblocking plate will drive the unblocking rods to move. The moving unblocking rods can reduce the possibility of blockage of the rotating feed plate 9.

[0055] A method for mixing, stirring, coating, and granulating water-soluble multi-form nitrogen fertilizer includes the following steps:

[0056] S1. Raw material preparation: Prepare nitrate nitrogen source, ammonium nitrogen source, amide nitrogen source, and additives;

[0057] S2. Raw material coarse treatment: grinding nitrate nitrogen source and ammonium nitrogen source into powder;

[0058] S3. Mixing and stirring: The treated nitrate nitrogen powder and ammonium nitrogen powder are precisely measured according to the formula ratio and added to the stirring component 1. They are then vigorously stirred and mixed to form a uniform powder mixture.

[0059] S4. Granulation: The mixed powder mixture is transported to the granulation component 3 through the transport component 2 to form a viscous and uniform slurry. This slurry is then passed through a spray granulation tower to produce small particles with rounded shape, good solubility, and moderate strength.

[0060] S5. Cooling and screening: The small particles are cooled by passing them through a cooling drum, and the cooled particles are then graded and screened by a vibrating screen.

[0061] S6. Packaging: Different grades of small particles are packaged separately to complete the production of water-soluble polymorphic nitrogen fertilizer.

[0062] In this invention, when processing water-soluble polymorphic nitrogen fertilizer is required, the corresponding raw materials are first placed into the mixing tank, and the stirring motor and conveyor motor are started. The stirring motor drives the stirrer to rotate, and the stirrer drives the stirring tilt rod to rotate, so that the fixed raw materials in the mixing tank can be better mixed together. The mixed raw materials are discharged and fall onto the conveyor belt. The conveyor belt can transport the mixed raw materials to the granulation component 3 and start the granulation operation. After a period of time, the processed material is taken out and then subjected to subsequent cooling and screening operations to finally complete the processing of water-soluble polymorphic nitrogen fertilizer. The above are all existing technologies.

[0063] In the process of processing water-soluble polymorphic nitrogen fertilizer, the material transported by the conveyor belt enters the rotating drum 11 through the rotating feed plate 9. Then, other appropriate amounts of raw materials (mainly molten urea liquid) are poured into the rotating drum 11 through the rotating feed plate 9. The rotating motor 5 is started, and the rotating motor 5 drives the rotating shaft 6 to rotate. The rotating shaft 6 drives the rotating drum 11 to rotate through the first gear 7 and the gear ring 10, so that the material in the rotating drum 11 is fully mixed and stirred. At the same time, the rotating shaft 6 also drives the second gear 8, the fourth gear 12 and the third gear 13 through the second gear 8, the fourth gear 12 and the third gear 14. 5 drives the control cylinder 13 to rotate, and the control cylinder 13 drives the reciprocating screw 16, stirring shaft 18, stirring cylinder 19, stirring rod 22 and stirring plate 20 to rotate. Under the action of the reciprocating screw 16 and the reciprocating screw cylinder 17, the reciprocating screw 16 will also move back and forth relative to the control cylinder 13. The reciprocating screw 16 drives the stirring cylinder 19, stirring rod 22 and stirring plate 20 to move back and forth relative to the control cylinder 13 through the stirring shaft 18, which speeds up the mixing and stirring rate of the material inside the rotating cylinder 11, saves processing time and achieves better processing results.

[0064] During the movement of the stirring shaft 18, the rotating ring 21, vertical plate 27, second connecting rod, fifth rack 31 and extrusion shaft 29 will rotate back and forth. The rotating extrusion shaft 29 will drive the threaded rod 32, extrusion frame 33 and extrusion plate 34 to move up and down relative to the limiting plate 28. During the up and down movement of the extrusion plate 34, the extrusion plate 34 can abut against the bottom of the rotating cylinder 11. During the mixing process, if some raw materials are still in large lumps after a long mixing process, these large raw materials are heavy and will accumulate on the lower side of the rotating cylinder 11. Therefore, the up and down moving extrusion plate 34 will abut against these large raw materials, forming a crushing effect on these large raw materials, making them smaller, and ultimately improving the mixing quality.

[0065] During the up-and-down movement of the extrusion plate 34, the stirring plate 20 moves towards and away from the extrusion plate 34. When the protrusion 35 on the outer side of the extrusion plate 34 and the arc-shaped rod 38 on the outer side of the stirring plate 20 come into contact, the stirring plate 20 and the arc-shaped rod 38 will rotate around the stirring cylinder 19 due to the obstruction of the protrusion 35. This will cause the angle between the stirring plate 20 and the stirring cylinder 19 to change. Since the stirring plate 20 is still rotating and moving at this time, the deflected stirring plate 20 will cause the material inside the rotating cylinder 11 to move laterally during the stirring of the raw materials, making the material inside the rotating cylinder 11 more evenly distributed, thereby further improving the stirring effect.

[0066] During the reciprocating movement of the stirring shaft 18, the stirring shaft 18 drives the control ring 36 and control rod 37 to move back and forth as a whole. When the control rod 37 moves to the outside of the round rod 39 and is opposite to the round rod 39, the reciprocating control rod 37 and the round rod 39 abut against each other, causing the round rod 39 to move relative to the rotating cylinder 11. The round rod 39 drives the filter plate 40 to move, causing the second tension spring 41 to deform. A gap appears between the filter plate 40 and the filter tank, allowing the material accumulated at the bottom of the rotating cylinder 11 to enter the filter tank through this gap. When the connection between 37 and the round rod 39 is broken, the filter plate 40 will return to its original position relative to the filter tank under the action of the second tension spring 41, and the filter tank will be closed. Then, during the rotation of the rotating cylinder 11, the control rod 37 will abut against the round rod 39 only when the filter tank of the rotating cylinder 11 is located in the lower area. As the rotating cylinder 11 continues to rotate, the material in the filter tank will flow out from the filter tank, but large particles and substances that cannot be mixed will remain in the filter tank, thus completing the separation operation of large particles and substances that cannot be mixed.

Claims

1. A device for mixing, stirring, coating, and granulating water-soluble multi-form nitrogen fertilizer, comprising a stirring component (1), a transport component (2), and a granulation component (3), characterized in that, The granulation assembly (3) includes a support frame (4), which is rotatably connected to a rotating cylinder (11). A mixing assembly is installed inside the rotating cylinder (11). The mixing assembly includes a fixed plate (14) fixedly mounted on the support frame (4). A control cylinder (13) is rotatably connected to the fixed plate (14). A power assembly is fixedly mounted on the support frame (4). A reciprocating screw (16) is slidably connected to the control cylinder (13). A stirring shaft (18) is fixedly connected to the reciprocating screw (16). A reciprocating screw cylinder (17) is threadedly connected to the reciprocating screw (16). The reciprocating spool (17) is fixedly connected to the first connecting rod and the support frame (4). The stirring shaft (18) is fixedly connected to the stirring cylinder (19). The stirring cylinder (19) is slidably connected to the sliding plate (25). The sliding plate (25) and the stirring cylinder (19) are fixedly connected to the first tension spring (26). The sliding plate (25) is rotatably connected to the rotating plate (23). The rotating plate (23) and the sliding plate (25) are fixedly connected to the first torsion spring (24). The rotating plate (23) is fixedly connected to the stirring rod (22). The stirring rod (22) is fixedly connected to the stirring plate (20).

2. The device for mixing, stirring, coating, and granulating water-soluble multi-form nitrogen fertilizer according to claim 1, characterized in that, The power assembly includes a rotating motor (5) fixedly installed on the side wall of the support frame (4). The output end of the rotating motor (5) is fixedly connected to a rotating shaft (6). The rotating shaft (6) is fixedly connected to a first gear (7) and a second gear (8). The rotating cylinder (11) is fixedly connected to a gear ring (10). The gear ring (10) meshes with the first gear (7). The rotating cylinder (11) is rotatably connected to a rotating feed plate (9). The rotating feed plate (9) is fixedly connected to the support frame (4). The control cylinder (13) is fixedly connected to a third gear (15). The fixed plate (14) is rotatably connected to a fourth gear (12). The fourth gear (12) meshes with both the third gear (15) and the second gear (8).

3. The device for mixing, stirring, coating, and granulating water-soluble multi-form nitrogen fertilizer according to claim 2, characterized in that, The rotating cylinder (11) is equipped with an extrusion assembly, which includes a limiting plate (28) fixedly installed on the side wall of the rotating feed plate (9). The limiting plate (28) is rotatably connected to an extrusion shaft (29). The extrusion shaft (29) is fixedly connected to a fifth gear (30). The stirring shaft (18) is rotatably connected to a rotating ring (21). The rotating ring (21) is fixedly connected to a vertical plate (27). The vertical plate (27) is fixedly connected to a fifth rack (31) via a second connecting rod. The fifth rack (31) and the limiting plate (28) are slidably connected, and the fifth rack (31) and the fifth gear (30) mesh with each other. The extrusion shaft (29) is threadedly connected to a threaded rod (32). The threaded rod (32) and the limiting plate (28) are slidably connected. The threaded rod (32) is fixedly connected to an extrusion frame (33). The extrusion frame (33) is fixedly connected to an extrusion plate (34).

4. The device for mixing, stirring, coating, and granulating water-soluble multi-form nitrogen fertilizer according to claim 3, characterized in that, The extrusion plate (34) is fixedly connected with a plurality of protrusions (35), and the stirring plate (20) is fixedly connected with an arc-shaped rod (38).

5. The device for mixing, stirring, coating, and granulating water-soluble multi-form nitrogen fertilizer according to claim 4, characterized in that, A filter assembly is installed inside the rotating cylinder (11). The filter assembly includes a filter groove on the side wall of the rotating cylinder (11). Two filter plates (40) are slidably connected to the filter groove. A second tension spring (41) is fixedly connected between the filter plate (40) and the filter groove. A square rod (42) is fixedly connected to the filter plate (40). A round rod (39) is fixedly connected to the square rod (42). A control ring (36) is symmetrically rotatably connected to the stirring shaft (18). Two control rods (37) are symmetrically fixedly connected to the control ring (36). One of the control rods (37) is located on the lower side of the limiting plate (28) and is slidably connected to the limiting plate (28).

6. The device for mixing, stirring, coating, and granulating water-soluble multi-form nitrogen fertilizer according to claim 5, characterized in that, The support frame (4) is fixedly connected with multiple shock-absorbing pads.

7. The device for mixing, stirring, coating, and granulating water-soluble multi-form nitrogen fertilizer according to claim 6, characterized in that, The lower end face of the extrusion plate (34) is arc-shaped, and multiple recesses are opened on the outer side of the extrusion plate (34).

8. The device for mixing, stirring, coating, and granulating water-soluble multi-form nitrogen fertilizer according to claim 7, characterized in that, Multiple unclogging rods are slidably connected inside the rotating feed plate (9), and an unclogging plate is fixedly connected to the outer side of the multiple unclogging rods. The unclogging plate and the stirring shaft (18) are rotatably connected.

9. A method for mixing, stirring, coating, and granulating water-soluble polymorphic nitrogen fertilizer according to claim 8, characterized in that, Includes the following steps: S1. Raw material preparation: Prepare nitrate nitrogen source, ammonium nitrogen source, amide nitrogen source, and additives; S2. Raw material coarse treatment: grinding nitrate nitrogen source and ammonium nitrogen source into powder; S3. Mixing and stirring: The prepared nitrate nitrogen powder and ammonium nitrogen powder are precisely measured according to the formula ratio and added to the stirring component (1) for vigorous stirring and mixing to form a uniform powder mixture. S4. Granulation: The mixed powder mixture is transported to the granulation assembly (3) through the transport component (2) to form a viscous and uniform slurry. Then, this slurry is used to produce small particles with rounded granules, good solubility, and moderate strength through the spray granulation tower. S5. Cooling and screening: The small particles are cooled by passing them through a cooling drum, and the cooled particles are then graded and screened by a vibrating screen. S6. Packaging: Different grades of small particles are packaged separately to complete the production of water-soluble polymorphic nitrogen fertilizer.

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