A fertilizer coating equipment
By introducing a multi-nozzle and guide plate structure into the fertilizer coating equipment, combined with a conveying spiral and fan drying, the problem of nutrient dilution during fertilizer coating is solved, and the uniformity and efficiency of fertilizer coating are improved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NINGXIA CHENXIN MODERN AGRICULTURAL TECHNOLOGY SERVICE CO LTD
- Filing Date
- 2025-07-25
- Publication Date
- 2026-07-31
AI Technical Summary
In existing fertilizer coating equipment, the nutrients that have been attached to the surface of the granules in the previous process are diluted in the subsequent coating solution, resulting in a decrease in the efficacy of the finished fertilizer.
Design a fertilizer coating device that uses a multi-nozzle and guide plate structure, combined with a conveying screw and fan drying, to achieve uniform contact and timely solidification of fertilizer and coating liquid, reducing dilution.
This improves the uniformity and efficiency of fertilizer coating, ensures the quality of the finished fertilizer and the accuracy of nutrient content, and avoids the dilution of nutrients in subsequent processes.
Smart Images
Figure CN224573686U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of fertilizer technology, and in particular to a fertilizer coating device. Background Technology
[0002] In the fertilizer production process, coating fertilizer granules is a key step to improve fertilizer utilization and reduce environmental pollution. By coating the surface of the granules with specific coating agents (such as slow-release agents, insect repellents, etc.), the nutrient release rate can be effectively controlled and the ability to resist pests and diseases can be enhanced.
[0003] The fertilizer coating device is the core equipment for this process. Its basic workflow is as follows: the fertilizer granules to be coated are transported into the device, the coating liquid is atomized and sprayed evenly on the surface of the granules through the atomizing nozzle, and after the coating layer solidifies, the finished granules are transported to the next stage.
[0004] However, existing coating equipment has significant technical limitations: it employs a coating method that involves "directly mixing a solid fertilizer core with a nutrient-containing paste-like liquid." Since fertilizer coating typically requires three or even four processes, the nutrients already adhering to the granule surface in previous processes are continuously diluted by the newly added coating liquid during subsequent coating steps. This problem directly leads to the nutrient content in the finished fertilizer deviating from the optimal range, ultimately resulting in reduced fertilizer efficacy. Utility Model Content
[0005] The purpose of this invention is to address the shortcomings of existing technologies where the coating already attached to the surface of the particles in the preceding process is easily diluted by the subsequent coating solution, and to propose a fertilizer coating device.
[0006] To achieve the above objectives, the present invention adopts the following technical solution:
[0007] Design a fertilizer coating device, including a housing, a feed hopper fixedly installed at the upper end of the housing, a motor fixedly installed inside the feed hopper, a drive shaft installed at the end of the motor, a first feeding channel and a second feeding channel fixedly installed inside the housing, a first conveying screw fixedly installed on the portion of the drive shaft extending to the inner side of the first feeding channel, a second conveying screw fixedly installed on the portion of the drive shaft extending to the inner side of the second feeding channel, a first nozzle fixedly installed at the top of the housing, and a second nozzle fixedly installed at the bottom of the first feeding channel.
[0008] Preferably, a first guide plate and a second guide plate are fixedly installed on the outside of the drive shaft, with the first guide plate located below the first nozzle and the second guide plate located below the second nozzle.
[0009] Preferably, both the first guide plate and the second guide plate are in the shape of a trumpet with the opening facing downwards.
[0010] Preferably, a first agitator and a second agitator are fixedly installed on the outside of the drive shaft, with the first agitator located above the first feeding channel and the second agitator located above the second feeding channel.
[0011] Preferably, the outer edges of the first and second agitator discs are curved upwards, and there is a gap between the inner edges and the drive shaft.
[0012] Preferably, both the first and second agitator disks are fixedly installed with baffles, and multiple baffles are arranged in a circular array around the drive shaft.
[0013] Preferably, a mesh cylinder is fixedly installed on the inner wall surface of both the first and second feeding channels, and a fan is also fixedly installed inside the first and second feeding channels. A pair of air outlet pipes are fixedly installed on the side wall of the housing, and the pair of air outlet pipes are respectively located in the first and second feeding channels.
[0014] Preferably, the bottom inner side of the first and second feeding channels is provided with a flow channel, and the flow channel is inclined downward on the side near the mesh cylinder.
[0015] The fertilizer coating equipment proposed in this utility model has the following advantages: During use, the fertilizer is dispersed by the first and second guide plates, allowing the fertilizer particles to contact the coating liquid more evenly and improving the uniformity of the coating. Furthermore, multiple nozzles can be used to achieve different types of coating operations, meeting diverse coating needs. Continuous conveying by the first and second conveying screws, combined with the synchronous drying process, forms a seamless coating process, reducing intermediate downtime. During the conveying process, a fan and a mesh cylinder are used to dry the coated fertilizer, ensuring timely solidification of the coating layer and preventing dilution of the previously attached coating layer during subsequent coating processes. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the structure of a fertilizer coating device proposed in this utility model;
[0017] Figure 2 This is a top view of a fertilizer coating device proposed in this utility model.
[0018] Figure 3 for Figure 1 Schematic diagram of the cross-sectional structure at point AA;
[0019] Figure 4 for Figure 1 Schematic diagram of the cross-sectional structure at point BB;
[0020] Figure 5This is a three-dimensional structural diagram of the first stirring disc in a fertilizer coating device proposed in this utility model.
[0021] In the diagram: 1. Shell; 2. Feed hopper; 3. Motor; 4. Drive shaft; 5. First nozzle; 6. First guide plate; 7. First agitator; 71. Baffle; 8. First feeding channel; 81. Mesh cylinder; 82. Fan; 83. Air outlet pipe; 9. First conveying screw; 10. Second nozzle; 11. Second guide plate; 12. Second agitator; 13. Second feeding channel; 14. Second conveying screw; 15. Drainage trough. Detailed Implementation
[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.
[0023] Example 1: Refer to Figure 1-3 A fertilizer coating device includes a housing 1, with a feed hopper 2 fixedly installed at the upper end of the housing 1. Fertilizer to be coated can be fed into the housing 1 through the feed hopper 2. A motor 3 is fixedly installed inside the feed hopper 2, and a drive shaft 4 is fixedly installed at the end of the motor 3. Starting the motor 3 can drive the drive shaft 4 to rotate. A first nozzle 5 is fixedly installed at the top of the housing 1, and a second nozzle 10 is fixedly installed at the bottom of a first feeding channel 8. The first nozzle 5 and the second nozzle 10 are connected to an external liquid storage tank through an external infusion pump. The liquid storage tank stores coating liquid. The nozzles spray the coating liquid onto the fertilizer, which can form a coating on the surface of the fertilizer granules. This coating covers the surface of the water-soluble granular fertilizer, which can prevent the fertilizer from directly contacting the soil and crop roots, thus improving fertilizer utilization.
[0024] A first guide plate 6 and a second guide plate 11 are fixedly installed on the outside of the drive shaft 4. The first guide plate 6 is located below the first nozzle 5, and the second guide plate 11 is located below the second nozzle 10. Both the first guide plate 6 and the second guide plate 11 are funnel-shaped with their openings facing downwards. The fertilizer entering through the feed hopper 2 will first come into contact with the first guide plate 6. The first guide plate 6 can spread the fertilizer outwards. The coating liquid sprayed from the first nozzle 5 can be sprayed onto the surface of the spread fertilizer, preventing the fertilizer from falling in a concentrated manner and failing to fully contact the coating liquid.
[0025] The housing 1 has a first feeding channel 8 and a second feeding channel 13 fixedly installed inside. The part of the drive shaft 4 extending into the inner side of the first feeding channel 8 is fixedly installed with a first conveying screw 9, and the part of the drive shaft 4 extending into the inner side of the second feeding channel 13 is fixedly installed with a second conveying screw 14. When the drive shaft 4 rotates, it can drive the first conveying screw 9 and the second conveying screw 14 to rotate. The conveying screws can convey fertilizer downward from inside the feeding channel. The falling speed of the fertilizer can be controlled. By reducing the falling speed of the fertilizer, it is easier for the fertilizer to come into contact with the coating liquid, thereby improving the coating efficiency.
[0026] Both the first feeding channel 8 and the second feeding channel 13 have mesh cylinders 81 fixedly installed on their inner walls. A fan 82, a hot air blower, is also fixedly installed inside the first feeding channel 8 and the second feeding channel 13. The air blown by the fan 82 passes through the mesh cylinders 81 and blows onto the fertilizer inside the channel. The flowing hot air heats and dries the fertilizer granules, promptly solidifying the coating layer. This prevents the fertilizer from diluting the previously attached coating layer during subsequent coating processes, avoids adhesion between fertilizer granules, and ensures the integrity of the coated fertilizer granules and product quality. A pair of air outlet pipes 83 are fixedly installed on the side wall of the shell 1, located in the first feeding channel 8 and the second feeding channel 13 respectively. The air outlet pipes 83 can discharge moisture, accelerating the drying efficiency. A diversion trough 15 is provided at the bottom of the inner side of the first feeding channel 8 and the second feeding channel 13. The diversion trough 15 is inclined downward on the side near the screen cylinder 81. When the fertilizer granules are conveyed by the conveying screw, some residue inside them will enter the conveying channel through the through hole inside the screen cylinder 81. The residue can be collected by the diversion trough 15 and guided to be conveyed downward through the bottom of the screen cylinder 81.
[0027] Working Principle: When using this fertilizer coating equipment, the starter motor 3 drives the drive shaft 4 to rotate. The rotation of the drive shaft 4 drives the first conveying screw 9 and the second conveying screw 14 to rotate. The fertilizer to be coated is fed into the housing 1 through the feed hopper 2. The fertilizer is first dispersed by the first guide plate 6. At the same time, the coating liquid sprayed by the first nozzle 5 falls on the surface of the fertilizer to complete the coating. The fertilizer falls on the upper end of the first feeding channel 8. The first conveying screw 9 conveys the fertilizer downward. During the conveying process, the air blown by the blower 82 comes into contact with the fertilizer through the mesh cylinder 81 to dry the fertilizer particles. Then the fertilizer falls downward from the inside of the first feeding channel 8. The falling fertilizer is dispersed by the obstruction of the second guide plate 11. At the same time, different types of coating liquid sprayed by the second nozzle 10 complete the coating on the surface of the fertilizer. Different types of coating operations are performed on the fertilizer. The coated fertilizer falls on the upper end of the second feeding channel 13. The second conveying screw 14 conveys the fertilizer downward. Similarly, the fertilizer particles are dried again. Finally, the fertilizer is discharged.
[0028] Example 2: Refer to Figure 1 and Figure 4-5 In another preferred embodiment of this utility model, based on embodiment 1, a first stirring plate 7 and a second stirring plate 12 are fixedly installed on the outside of the drive shaft 4. When the drive shaft 4 rotates, it can drive the first stirring plate 7 and the second stirring plate 12 to rotate. The first stirring plate 7 is located above the first feeding channel 8, and the second stirring plate 12 is located above the second feeding channel 13. The outer edges of the first stirring plate 7 and the second stirring plate 12 are curved upwards, and there is a gap between the inner side and the drive shaft 4. The fertilizer dispersed by the first guide plate 6 will fall on the surface of the first stirring plate 7, which can reduce the falling speed of the fertilizer and allow the fertilizer to come into more full contact with the coating liquid. A partition plate 71 is fixedly installed inside the first stirring plate 7 and the second stirring plate 12. Multiple partition plates 71 are arranged in a circumferential array around the drive shaft 4. When the stirring plate rotates, the partition plates 71 can better drive the fertilizer particles to rotate. The nozzle sprays the coating liquid onto the fertilizer surface on the stirring plate. The stirring plate continuously drives the fertilizer to rotate, and the fertilizer will also continuously slide down and flow during the rotation, allowing the fertilizer to fully contact the coating liquid. Finally, the coated fertilizer can fall through the gap in the middle of the stirring plate.
[0029] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.
Claims
1. A fertilizer coating apparatus comprising a housing (1), characterized in that, A feeding hopper (2) is fixedly installed at the upper end of the housing (1). A motor (3) is fixedly installed inside the feeding hopper (2). A drive shaft (4) is installed at the end of the motor (3). A first feeding channel (8) and a second feeding channel (13) are fixedly installed inside the housing (1). A first conveying screw (9) is fixedly installed on the part of the drive shaft (4) extending to the inside of the first feeding channel (8). A second conveying screw (14) is fixedly installed on the part of the drive shaft (4) extending to the inside of the second feeding channel (13). A first nozzle (5) is fixedly installed on the top of the housing (1). A second nozzle (10) is fixedly installed on the bottom of the first feeding channel (8).
2. The fertilizer coating apparatus according to claim 1, wherein The drive shaft (4) is fixedly mounted with a first guide plate (6) and a second guide plate (11). The first guide plate (6) is located below the first nozzle (5), and the second guide plate (11) is located below the second nozzle (10).
3. The fertilizer coating equipment according to claim 2, characterized in that, Both the first guide plate (6) and the second guide plate (11) are flared with their openings facing downwards.
4. The fertilizer coating equipment according to claim 1, characterized in that, The first agitator (7) and the second agitator (12) are fixedly installed on the outside of the drive shaft (4). The first agitator (7) is located above the first feeding channel (8), and the second agitator (12) is located above the second feeding channel (13).
5. The fertilizer coating equipment according to claim 4, characterized in that, The outer edges of the first stirring plate (7) and the second stirring plate (12) are bent upwards and there is a gap between the inner side and the drive shaft (4).
6. The fertilizer coating equipment according to claim 5, characterized in that, Both the first stirring plate (7) and the second stirring plate (12) are fixedly installed with partitions (71), and multiple partitions (71) are arranged in a circular array around the drive shaft (4).
7. The fertilizer coating equipment according to claim 1, characterized in that, The inner walls of the first feeding channel (8) and the second feeding channel (13) are both fixedly installed with mesh cylinders (81). Fans (82) are also fixedly installed inside the first feeding channel (8) and the second feeding channel (13). A pair of air outlet pipes (83) are fixedly installed on the side wall of the housing (1). The pair of air outlet pipes (83) are located in the first feeding channel (8) and the second feeding channel (13) respectively.
8. The fertilizer coating equipment according to claim 7, characterized in that, The first feeding channel (8) and the second feeding channel (13) have a flow channel (15) at the bottom of their inner sides. The flow channel (15) is inclined downward on the side near the mesh cylinder (81).