Fertilizer powder spraying and drying mechanism

Abstract

This invention relates to the field of fertilizer production technology, specifically to a fertilizer spraying and drying mechanism, comprising a feeding mechanism, a spraying mechanism, and a drying mechanism. A lifting component is used to throw the fertilizer conveyed into the feeding cylinder to impact the inner wall of the feeding cylinder. The top of the spraying cylinder is connected to the bottom of the feeding cylinder. One end of a powder guide pipe is connected to the top of the spraying cylinder and also connected to the spraying machine. The other end extends along the height direction of the spraying cylinder into the cylinder. Spiral blades are fixed to the powder guide pipe, and a curved channel is formed between the spiral blades and the inner wall of the spraying cylinder. Multiple spray nozzles are provided on the powder guide pipe corresponding to the curved channel. A drying pipe is connected to the bottom of the spraying cylinder. A conveying component is located inside the drying pipe and is used to convey fertilizer along the length direction of the drying pipe. A hot air component is used to deliver hot airflow into the drying pipe. This invention solves the problem of insufficient coating of anti-adhesion powder material on the surface of fertilizer granules, which makes the fertilizer granules prone to clumping together.

Description

Technical Field

[0001] This invention relates to the field of fertilizer production equipment technology, specifically to a fertilizer spraying and drying mechanism. Background Technology

[0002] Compound fertilizer is a chemical fertilizer made by chemical or mixing methods that contains any two or three of the crop nutrients nitrogen, phosphorus, and potassium. Its function is to meet the comprehensive and balanced needs of agriculture for various nutrients under different production conditions. It is widely used in modern agriculture. During the production process of compound fertilizer, the fertilizer needs to be sprayed with powder and dried in order to prevent the fertilizer from sticking together during storage.

[0003] Patent document with existing patent application number 202120617078.3 discloses a powder spraying device for higher fertilizer efficiency, specifically disclosing a base plate, a chassis body, a first powder sprayer, and a second powder sprayer. The chassis body is located above the base plate, with casters at the four corners below. A powder spraying pipe is located on one side of the chassis body, and multiple diverter plates are evenly spaced inside the powder spraying pipe. The first powder sprayer is located at the upper center of the powder spraying pipe, and multiple first powder spraying heads are located at the bottom of the first powder sprayer, arranged inside the powder spraying pipe. A stirring motor is installed on the top of the wall and the bottom plate. Spiral blades are installed inside the lower part of the machine body. The output shaft of the stirring motor is fixedly connected to the spiral blades through a flange. A second powder sprayer is installed on the top of the machine body. With the above scheme, fertilizer can be powdered twice during fertilizer transportation. However, during fertilizer transportation, the distance between fertilizer particles is relatively close and the fertilizer has poor flowability. It is easy for the surface of fertilizer particles to be insufficiently coated with anti-adhesion powder material. When the fertilizer is stored or packaged for transportation, the fertilizer particles are easy to stick together and affect the production quality of fertilizer. Summary of the Invention

[0004] The purpose of this invention is to overcome the above-mentioned technical deficiencies and provide a fertilizer spraying and drying mechanism that solves the problem in the prior art where the surface coating of fertilizer granules with anti-adhesion powder material is insufficient, making the fertilizer granules prone to sticking together.

[0005] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution:

[0006] This invention provides a fertilizer spraying and drying mechanism, comprising:

[0007] The feeding mechanism includes a feeding cylinder and a lifting member disposed inside the feeding cylinder. The lifting member is used to throw the fertilizer conveyed into the feeding cylinder out to impact the inner wall of the feeding cylinder.

[0008] A powder spraying mechanism, located below the feeding cylinder, includes a powder spraying cylinder (top connected to the bottom of the feeding cylinder), a powder sprayer, a powder guide pipe, and spiral blades. One end of the powder guide pipe is connected to the top of the powder spraying cylinder and the powder sprayer, while the other end extends into the powder spraying cylinder along its height. The spiral blades are fixedly connected to the powder guide pipe, and a curved channel is formed between the spiral blades and the inner wall of the powder spraying cylinder. Multiple powder spraying nozzles are provided on the powder guide pipe corresponding to the curved channel.

[0009] The drying mechanism is connected to the bottom of the powder spraying cylinder. It includes a drying pipe, a conveying component, and a hot air component connected to the bottom of the powder spraying cylinder. The conveying component is located inside the drying pipe and is used to convey fertilizer along the length of the drying pipe. The hot air component is used to convey hot air into the drying pipe.

[0010] In some embodiments, one end of the powder guide tube is rotatably connected to the top of the powder spraying cylinder, and the other end of the powder guide tube is connected to the powder spraying machine via a rotary joint. The top of the powder spraying cylinder is provided with a driving member, and the driving member is connected to one end of the powder guide tube. The driving member is used to drive the powder guide tube to rotate around its own axis.

[0011] In some embodiments, the bottom of the powder spraying cylinder is provided with an annular block, and an annular cavity is formed between the annular block and the outer wall of the powder spraying cylinder. The annular cavity is connected to the top of the powder spraying cylinder via an air extraction device, and a plurality of nozzles connected to the annular cavity are provided on the circumferential direction of the inner wall of the powder spraying cylinder.

[0012] In some embodiments, the transmission component includes two rotating drums, a conveyor belt, and a geared motor. The two rotating drums are fixedly disposed at opposite ends of the drying tube at a distance. The conveyor belt is connected between the two rotating drums. The geared motor is fixedly disposed outside the drying tube, and the output end of the geared motor is fixedly connected to the end of one of the rotating drums.

[0013] In some embodiments, a plurality of idlers for supporting the conveyor belt are rotatably arranged inside the drying tube.

[0014] In some embodiments, the hot air component includes a blower, a shroud, and a plurality of air supply pipes. The plurality of air supply pipes are fixedly disposed inside the drying tube along the length direction of the drying tube and are located below the transmission component. The shroud is fixed outside one end of the drying tube, and one end of the plurality of air supply pipes extends into the shroud. The blower is connected to the shroud, and the air supply pipes have a plurality of ventilation holes along the length direction.

[0015] In some embodiments, a heating element is inserted through the gas supply pipe along its length.

[0016] In some embodiments, a heat exchange mechanism is further included, wherein the air inlet of the heat exchange mechanism is connected to the other end of the drying tube via an air extraction member, and the air outlet of the heat exchange mechanism is connected to the air hood.

[0017] In some embodiments, a hopper is fixedly provided at the top of the feed cylinder, the lower end of the hopper extends into the feed cylinder, and the opening at the lower end of the hopper corresponds to the lifting member;

[0018] The lifting component includes a drive unit, a rotating shaft, and lifting plates. The drive unit is connected to the rotating shaft rotatably disposed inside the feed cylinder. A plurality of lifting plates are fixedly disposed at intervals on the rotating shaft. The drive unit is used to drive the rotating shaft to rotate around its own axis.

[0019] In some embodiments, the system further includes a mounting box, with the feeding cylinder movably disposed on the top of the mounting box, a vibrating element disposed on the feeding cylinder, the powder spraying cylinder fixedly disposed inside the mounting box, the powder spraying machine fixedly disposed on one side of the mounting box, the heat exchange mechanism fixedly disposed on the other side of the mounting box, one end of the drying tube fixedly disposed inside the mounting box, and a plurality of movable rollers disposed at the bottom of the mounting box.

[0020] Compared with the prior art, the fertilizer powdering and drying mechanism provided by the present invention uses a lifting component located inside the feeding cylinder to throw the fertilizer fed into the feeding cylinder to impact the inner wall of the feeding cylinder. The impact of the fertilizer clumps can break them into individual fertilizer particles, making it easier for the surface of the fertilizer particles to be fully powdered. As the fertilizer rolls continuously in the curved channel, the surface of the fertilizer particles will constantly change position. At the same time, multiple powder spraying nozzles spray powder into the curved channel, which can effectively ensure that the surface of the fertilizer particles is coated with anti-sticking powder material. After powdering, the fertilizer particles are dried to reduce the moisture content of the fertilizer particles, which can effectively prevent the fertilizer from sticking together during storage or transportation, thus affecting the production quality of the fertilizer. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of a fertilizer spraying and drying mechanism provided by the present invention;

[0022] Figure 2 This is a partial cross-sectional view of a fertilizer spraying and drying mechanism according to the present invention;

[0023] Figure 3 yes Figure 2 Enlarged diagram of A in the middle;

[0024] Figure 4 This is a schematic diagram of the internal structure of the drying mechanism of the present invention;

[0025] Figure 5This is the present invention. Figure 4 Enlarged diagram of B in the diagram;

[0026] Figure 6 This is a schematic diagram of the internal structure of the powder spraying cylinder of the present invention;

[0027] Figure 7 This is a schematic diagram of the internal structure of the feeding mechanism of the present invention. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0029] Please see Figures 1 to 7 This invention provides a fertilizer spraying and drying mechanism. This fertilizer spraying and drying mechanism is mainly used in the fertilizer production process to spray an anti-adhesion powder material onto the surface of fertilizer granules before packaging and storage, while simultaneously drying the fertilizer. This ensures that the fertilizer granules do not clump together after storage, preventing the fertilizer from becoming low-quality.

[0030] In this specific embodiment, a fertilizer spraying and drying mechanism includes a feeding mechanism 1, a spraying mechanism 2, and a drying mechanism 3. The feeding mechanism 1 includes a feeding cylinder 11 and a lifting member 12 disposed within the feeding cylinder 11. The lifting member 12 is used to throw the fertilizer conveyed into the feeding cylinder 11 out to impact the inner wall of the feeding cylinder 11. The spraying mechanism 2 is disposed below the feeding cylinder 11 and includes a spraying cylinder 21 whose top is connected to the bottom of the feeding cylinder 11, a sprayer 22, a powder guide pipe 23, and a spiral blade 24. One end of the powder guide pipe 23 is connected to the top of the spraying cylinder 21, and the other end of the powder guide pipe 23 is connected to the sprayer 22. The other end extends along the height direction of the powder spraying cylinder 21 into the powder spraying cylinder 21. The spiral blade 24 is fixedly connected to the powder guide tube 23, and a curved channel 20 is formed between the spiral blade 24 and the inner wall of the powder spraying cylinder 21. The powder guide tube 23 is provided with a plurality of powder spraying nozzles 25 corresponding to the curved channel 20. The drying mechanism 3 is connected to the bottom of the powder spraying cylinder 21. The drying mechanism 3 includes a drying pipe 31 connected to the bottom of the powder spraying cylinder 21, a transmission component 32, and a hot air component 33. The transmission component 32 is located inside the drying pipe 31. The transmission component 32 is used to transport fertilizer along the length direction of the drying pipe 31. The hot air component 33 is used to transport hot air into the drying pipe 31.

[0031] In actual use, fertilizer is first conveyed into the feeding cylinder 11. The lifting device 12 then throws the fertilizer into the feeding cylinder 11 to impact the inner wall of the feeding cylinder 11, breaking up any clumps of fertilizer. Subsequently, the fertilizer enters the feeding cylinder 11 and tumbles downwards in the curved channel 20. With multiple powder spray nozzles spraying powder into the curved channel, the surface of the fertilizer granules is effectively coated with anti-sticking powder material. Finally, the fertilizer is discharged from the feeding cylinder 11 into the drying pipe 31. The fertilizer is conveyed by the conveying device 32, and at the same time, the hot air device 33 delivers hot air into the drying pipe 31 to dry the fertilizer granules, preventing them from sticking together during storage.

[0032] Based on the above scheme, one end of the powder guide tube 23 is rotatably connected to the top of the powder spraying cylinder 21, and one end of the powder guide tube 23 is connected to the powder spraying machine 22 via a rotary joint. The top of the powder spraying cylinder 21 is provided with a driving member 26, and the driving member 26 is connected to one end of the powder guide tube 23. The driving member 26 is used to drive the powder guide tube 23 to rotate around its own axis.

[0033] It should be noted that the driving component 26 can be a servo motor 261 and a chain 262. The servo motor 261 is fixed on the top of the powder spraying cylinder 21. A drive gear is fixed on the output shaft of the servo motor 261. A driven gear is fixed at one end of the powder guide tube 23. The chain 262 is connected between the drive gear and the driven gear.

[0034] Specifically, the servo motor 261 drives the powder guide tube 23 to rotate around its own axis, and the spiral blade 24 rotates with the powder guide tube 23, which can accelerate the flow of fertilizer particles and improve the spraying rate. At the same time, it should be noted that the flow rate of fertilizer delivered to the spraying cylinder 21 needs to be controlled to avoid excessive amount of fertilizer being fed into the spraying cylinder 21 at one time, which could lead to uneven spraying of fertilizer particles or fertilizer blockage in the spraying cylinder 21.

[0035] Based on the above scheme, the bottom of the powder spraying cylinder 21 is provided with an annular block 211, and an annular cavity 210 is formed between the annular block 211 and the outer wall of the powder spraying cylinder 21. The annular cavity 210 is connected to the top of the powder spraying cylinder 21 via an air extraction device. The inner wall of the powder spraying cylinder 21 is provided with a plurality of nozzles 212 that are connected to the annular cavity 210 in the circumferential direction.

[0036] It should be noted that by drawing the airflow from the powder spraying cylinder 21 into the annular cavity 210 through the air extraction device, and then spraying it into the powder spraying cylinder 21 through multiple nozzles 212, the fertilizer in the powder spraying cylinder 21 can be powdered a second time, which further ensures that the surface of the fertilizer particles can be fully coated with powder.

[0037] In this specific embodiment, the transmission component 32 includes two rotating drums 321, a conveyor belt 322, and a reduction motor 323. The two rotating drums 321 are fixedly disposed at opposite ends of the drying tube 31 at intervals. The conveyor belt 322 is connected between the two rotating drums 321. The reduction motor 323 is fixedly disposed outside the drying tube 31, and the output end of the reduction motor 323 is fixedly connected to the end of one of the rotating drums 321.

[0038] It should be noted that the conveyor belt 322 is a commercially available sidewall conveyor belt. When the fertilizer falls from the powder spraying cylinder 21 onto the conveyor belt 322, it can be spread flat on the conveyor belt 322, avoiding the fertilizer particles from being squeezed against each other. The conveyor belt 322 drives the fertilizer to move in the drying pipe 31. The hot air flow delivered by the hot air component 33 into the drying pipe 31 dries the fertilizer and reduces the moisture content in the fertilizer.

[0039] Based on the above scheme, multiple idlers 324 are rotatably arranged inside the drying pipe 31 to support the conveyor belt 322. By setting the idlers 324 to support the conveyor belt 322, the stability of the conveyor belt 322 in transporting fertilizer can be effectively improved, and at the same time, the wear of the conveyor belt 322 during transmission can be reduced.

[0040] In this specific embodiment, the hot air component 33 includes a blower 331, a fan shroud 332, and a plurality of air supply pipes 333. The plurality of air supply pipes 333 are fixedly disposed inside the drying tube 31 along the length direction of the drying tube 31, and the plurality of air supply pipes 333 are located below the transmission component 32. The fan shroud 332 is fixedly disposed outside one end of the drying tube 31, and one end of the plurality of air supply pipes 333 extends into the fan shroud 332. The blower 331 is connected to the fan shroud 332, and a plurality of vent holes 330 are provided on the air supply pipes 333 along the length direction.

[0041] It should be noted that, due to the relatively long length of the drying tube 31, the hot airflow delivered by the blower 331 into the drying tube 31 is difficult to disperse throughout the entire drying tube 31, resulting in poor drying effect. Therefore, by inserting a heating element 334 along the length of the air supply pipe 333, the airflow in the air supply pipe 333 is heated by the heating element 334, and the hot airflow is then delivered to the drying tube 31 through the vent 330 on the air supply pipe 333, which can ensure that the hot airflow is evenly distributed throughout the entire drying tube 31.

[0042] Based on the above scheme, a heat exchange mechanism 4 is also included. The air inlet of the heat exchange mechanism 4 is connected to the other end of the drying pipe 31 via an air extraction component, and the air outlet of the heat exchange mechanism 4 is connected to the air hood 332.

[0043] It should be noted that the heat exchange mechanism 4 is a commonly sold structure on the market. Due to the high water content in the hot airflow, it is not convenient to circulate. Therefore, by using the heat exchange mechanism 4 to recover and utilize the waste heat of the hot airflow output from the drying tube 31, energy consumption and drying costs can be reduced.

[0044] Based on the above scheme, a hopper 13 is fixedly provided at the top of the feeding cylinder 11, and the lower end of the hopper 13 extends into the feeding cylinder 11. The opening at the lower end of the hopper 13 corresponds to the lifting member 12. The lifting member 12 includes a driving part 121, a rotating shaft 122, and lifting plates 123. The driving part 121 is connected to the rotating shaft 122 rotatably disposed in the feeding cylinder 11. A plurality of lifting plates 123 are fixedly disposed at intervals on the rotating shaft 122. The driving part 121 is used to drive the rotating shaft 122 to rotate around its own axis.

[0045] It should be noted that the drive unit 121 can be a servo motor. The drive unit 121 drives the lifting member 12 to rotate, lifting the fertilizer and hitting the inner wall of the feed cylinder 11, which can break up the fertilizer that is stuck together.

[0046] Based on the above scheme, it also includes a mounting box 5, the feeding cylinder 11 is movably disposed on the top of the mounting box 5, the feeding cylinder 11 is provided with a vibrating element 14, the powder spraying cylinder 21 is fixedly disposed inside the mounting box 5, the powder spraying machine 22 is fixedly disposed on one side of the mounting box 5, the heat exchange mechanism 4 is fixedly disposed on the other side of the mounting box 5, one end of the drying pipe 31 is fixedly disposed inside the mounting box 5, and the bottom of the mounting box 5 is provided with multiple moving rollers 51.

[0047] It should be noted that by setting multiple movable rollers 51 at the bottom of the mounting box 5, the entire mechanism can be moved, and all movable rollers 51 have a braking function. The vibrating element 14 is a vibrator fixed on the feed cylinder 11. Of course, it can also be other structures, as long as it can drive the feed cylinder 11 to ensure the vibration state. No other restrictions are made here.

[0048] The specific embodiments of the present invention described above do not constitute a limitation on the scope of protection of the present invention. Any other corresponding changes and modifications made in accordance with the technical concept of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A fertilizer spraying and drying mechanism, characterized in that, include: The feeding mechanism includes a feeding cylinder and a lifting member disposed inside the feeding cylinder. The lifting member is used to throw the fertilizer conveyed into the feeding cylinder out to impact the inner wall of the feeding cylinder. A powder spraying mechanism, located below the feeding cylinder, includes a powder spraying cylinder (top connected to the bottom of the feeding cylinder), a powder sprayer, a powder guide pipe, and spiral blades. One end of the powder guide pipe is connected to the top of the powder spraying cylinder and the powder sprayer, while the other end extends into the powder spraying cylinder along its height. The spiral blades are fixedly connected to the powder guide pipe, and a curved channel is formed between the spiral blades and the inner wall of the powder spraying cylinder. Multiple powder spraying nozzles are provided on the powder guide pipe corresponding to the curved channel. The drying mechanism is connected to the bottom of the powder spraying cylinder. It includes a drying pipe, a conveying component, and a hot air component connected to the bottom of the powder spraying cylinder. The conveying component is located inside the drying pipe and is used to convey fertilizer along the length of the drying pipe. The hot air component is used to convey hot air into the drying pipe. One end of the powder guide tube is rotatably connected to the top of the powder spraying cylinder, and the other end of the powder guide tube is connected to the powder spraying machine via a rotary joint. The top of the powder spraying cylinder is provided with a driving component, and the driving component is connected to one end of the powder guide tube. The driving component is used to drive the powder guide tube to rotate around its own axis. The bottom of the powder spraying cylinder is provided with an annular block, and an annular cavity is formed between the annular block and the outer wall of the powder spraying cylinder. The annular cavity is connected to the top of the powder spraying cylinder via an air extraction device. Multiple nozzles connected to the annular cavity are provided on the circumferential direction of the inner wall of the powder spraying cylinder.

2. The fertilizer spraying and drying mechanism according to claim 1, characterized in that, The transmission component includes two rotating drums, a conveyor belt, and a geared motor. The two rotating drums are fixedly disposed at opposite ends of the drying tube at a distance. The conveyor belt is connected between the two rotating drums. The geared motor is fixedly disposed outside the drying tube, and the output end of the geared motor is fixedly connected to the end of one of the rotating drums.

3. The fertilizer spraying and drying mechanism according to claim 2, characterized in that, The drying tube is equipped with multiple rollers that rotate to support the conveyor belt.

4. The fertilizer spraying and drying mechanism according to claim 1, characterized in that, The hot air component includes a blower, a fan shroud, and multiple air supply pipes. The multiple air supply pipes are fixed inside the drying tube along its length and are located below the transmission component. The fan shroud is fixed outside one end of the drying tube, and one end of the multiple air supply pipes extends into the fan shroud. The blower is connected to the fan shroud, and multiple ventilation holes are provided on the air supply pipes along their length.

5. A fertilizer spraying and drying mechanism according to claim 4, characterized in that, A heating element is inserted into the gas supply pipe along its length.

6. A fertilizer spraying and drying mechanism according to claim 4, characterized in that, It also includes a heat exchange mechanism, the air inlet of which is connected to the other end of the drying pipe via an air extraction device, and the air outlet of which is connected to the air hood.

7. A fertilizer spraying and drying mechanism according to claim 1, characterized in that, A hopper is fixedly provided at the top of the feeding cylinder, and the lower end of the hopper extends into the feeding cylinder. The opening at the lower end of the hopper corresponds to the lifting component. The lifting component includes a drive unit, a rotating shaft, and lifting plates. The drive unit is connected to the rotating shaft rotatably disposed inside the feed cylinder. A plurality of lifting plates are fixedly disposed at intervals on the rotating shaft. The drive unit is used to drive the rotating shaft to rotate around its own axis.

8. A fertilizer spraying and drying mechanism according to claim 6, characterized in that, It also includes an installation box, the feeding cylinder is movably disposed on the top of the installation box, the feeding cylinder is provided with a vibrating element, the powder spraying cylinder is fixed inside the installation box, the powder spraying machine is fixed on one side of the installation box, the heat exchange mechanism is fixed on the other side of the installation box, one end of the drying tube is fixed inside the installation box, and the bottom of the installation box is provided with multiple moving rollers.

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