Nitrogen, phosphorus and potassium fertilizer granulator anti-clogging nozzle device

Abstract

This utility model relates to the field of granulator nozzle technology, specifically an anti-clogging nozzle device for a nitrogen, phosphorus, and potassium fertilizer granulator. The device includes a granulation nozzle and a mounting plate. A drive motor is fixed to the top of the mounting plate, and the output shaft of the drive motor passes through the mounting plate and is fixed to a rotating shaft. A feed hopper is fixed above the surface of the granulation nozzle, and a feed channel is provided at the top of the nozzle. The rotating shaft passes through the feed channel and is fixedly connected to the bottom of the inner wall of the nozzle. Multiple evenly spaced spray holes are formed on the surface of the nozzle. A vent pipe is fixed to the surface of the mounting plate, passing through the feed channel and entering the interior of the nozzle. Multiple air jet pipes are connected to the surface of the vent pipe. A sliding groove is formed on the surface of the mounting plate, and a slider is slidably connected to the surface of the groove. The beneficial effect is that it effectively prevents material from adhering to the inner wall of the spray holes, reducing the risk of clogging.

Description

Technical Field

[0001] This utility model relates to the field of granulator nozzle technology, specifically an anti-clogging nozzle device for a nitrogen, phosphorus, and potassium fertilizer granulator. Background Technology

[0002] Nitrogen, phosphorus, and potassium fertilizer (NPK compound fertilizer) is a compound fertilizer containing three main nutrients: nitrogen (N), phosphorus (P), and potassium (K). The granulation of NPK compound fertilizer mainly adopts high-tower granulation, rotary drum granulation, or fluidized bed granulation. Among them, the nozzle is one of the core equipment, and its function is closely related to the granulation principle.

[0003] Utility model patent CN216396255U discloses a rotary granulator nozzle for bisphenol A granulation, comprising a rotary motor, a feed hopper, an anti-slip baffle, and spray holes. The top of the feed hopper is fixedly connected to the top of the inner wall of the rotary granulator nozzle, and a feed pipe is fixedly connected to the bottom of the feed hopper. A rotating shaft is fixedly connected to the output end of the rotary motor. This utility model relates to the field of bisphenol A granulation technology. This rotary granulator nozzle, suitable for bisphenol A granulation with an annual processing capacity of 200,000-300,000 tons, utilizes centrifugal force through the coordinated use of the rotary motor, feed hopper, anti-slip baffle, spray holes, feed pipe, and feed tube to uniformly spray the raw material from the spray holes, resulting in uniform particle diameter. It has advantages such as compact structure, uniform liquid spraying, and good granulation size and quality, solving the problem of insufficient design and poor performance of existing rotary granulator nozzles.

[0004] The aforementioned rotary granulation nozzle reduces the residue of raw materials inside the nozzle through the design of a rotary motor and centrifugal force. However, for some high-viscosity or easily crystallizing raw materials, such as certain components in nitrogen, phosphorus and potassium fertilizers, blockage may still occur inside the nozzle or at the nozzle orifice, affecting the granulation effect. Utility Model Content

[0005] To overcome the shortcomings of the existing technology, this utility model proposes an anti-clogging nozzle device for a nitrogen, phosphorus, and potassium fertilizer granulator to solve the problems mentioned above.

[0006] The technical solution adopted by this utility model to solve its technical problem is:

[0007] An anti-clogging nozzle device for a nitrogen, phosphorus, and potassium fertilizer granulator includes a granulation nozzle and a mounting plate. A drive motor is fixed to the top of the mounting plate, and the output shaft of the drive motor passes through the mounting plate and is fixed to a rotating shaft. A feed hopper is fixed above the surface of the granulation nozzle, and a feed channel is provided at the top of the granulation nozzle. The rotating shaft passes through the feed channel and is fixedly connected to the bottom of the inner wall of the granulation nozzle. Multiple equally spaced spray holes are opened on the surface of the granulation nozzle. An air vent is fixed to the surface of the mounting plate. The air vent passes through the feed channel and enters the interior of the granulation nozzle. Multiple air jet pipes are connected to the surface of the air vent. A sliding groove is opened on the surface of the mounting plate, and a slider is slidably connected to the surface of the sliding groove. A connecting rod is slidably connected to the surface of the slider. The connecting rod passes through the feed channel and enters the interior of the granulation nozzle. A scraper is fixed to the surface of the connecting rod and is slidably connected to the inner wall of the granulation nozzle. Multiple mounting holes are opened on the surface of the mounting plate, and an air inlet connector is connected to the top of the air vent.

[0008] Preferably, the nozzle diameter is 0.8-1.2 mm, and the inner diameter of the jet pipe is 1.5-2 times that of the nozzle.

[0009] Preferably, the inner wall of the nozzle is coated with an anti-stick coating, which is a polytetrafluoroethylene coating.

[0010] Preferably, a guide plate is fixed to the surface of the rotating shaft, and both the feed hopper and the guide plate are coated with a wear-resistant coating.

[0011] Preferably, a spring is fixed to one side of the inner wall of the groove, and one end of the spring is fixedly connected to the surface of the slider.

[0012] Preferably, a telescopic rod is provided inside the spring, one end of the telescopic rod is fixedly connected to the surface of the slide groove, and the other end of the telescopic rod is fixedly connected to the surface of the slider.

[0013] Preferably, both the slider and the connecting rod have combination holes on their surfaces, and the slider and the connecting rod are detachably connected by bolts through the combination holes.

[0014] Compared with the prior art, the beneficial effects of this utility model's anti-clogging nozzle device for a nitrogen, phosphorus, and potassium fertilizer granulator are:

[0015] First, this device improves the anti-clogging capability of the granulation nozzle, adapting to the granulation requirements of high-viscosity and easily crystallizing materials such as nitrogen, phosphorus, and potassium fertilizers. The polytetrafluoroethylene coating on the inner wall of the nozzle has excellent anti-adhesion properties, effectively preventing materials from sticking to the inner wall of the nozzle and reducing the risk of clogging. At the same time, the high-pressure gas cleaning mechanism of the air pipe and the air jet pipe can regularly clean the residual materials inside the nozzle, ensuring the unobstructed flow of the nozzle. The scraper slides on the inner wall of the granulation nozzle, which can scrape the inner wall around the nozzle and clean stubborn residual materials. This, together with the high-pressure gas cleaning, forms a double guarantee. Compared with traditional nozzle devices, this device significantly improves the reliability and production efficiency of the equipment, reduces downtime caused by clogging, and improves production continuity.

[0016] Secondly, the optimized structural design of this device improves its durability and ease of maintenance. The design of the guide plate and wear-resistant coating effectively reduces wear on the equipment during raw material flow, extending its service life. The coordinated design of the spring and telescopic rod provides stable support and guidance for the slider, ensuring a more stable scraping effect of the scraper and reducing the impact of vibration on the equipment. The slider and connecting rod are detachably connected by bolts, facilitating maintenance and replacement of the scraper and reducing equipment maintenance costs. Compared with traditional nozzle devices, this design not only improves the durability of the equipment but also enhances its flexibility and ease of maintenance, adapting to complex working conditions and significantly improving production efficiency and economic benefits. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0018] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0019] Figure 3 This is a partial structural schematic diagram of the present invention;

[0020] Figure 4 This utility model Figure 2 A magnified structural diagram at point A in the diagram.

[0021] The components are: 1. Granulation nozzle; 2. Mounting plate; 3. Drive motor; 4. Rotating shaft; 5. Mounting hole; 6. Feed channel; 7. Feed hopper; 8. Spray hole; 9. Vent pipe; 10. Air jet pipe; 11. Slide groove; 12. Slider; 13. Connecting rod; 14. Scraper; 15. Air inlet connector; 16. Guide plate; 17. Spring; 18. Telescopic rod. Detailed Implementation

[0022] The specific embodiments of this utility model will now be described in further detail with reference to the accompanying drawings.

[0023] Please refer to the anti-clogging nozzle device for a nitrogen, phosphorus, and potassium fertilizer granulator according to this specific embodiment. Figure 1 — Figure 4 The device includes a granulation nozzle 1 and a mounting plate 2. A drive motor 3 is fixed to the top of the mounting plate 2. The output shaft of the drive motor 3 passes through the mounting plate 2 and is fixed to a rotating shaft 4. A feed hopper 7 is fixed above the surface of the granulation nozzle 1. A feed channel 6 is provided at the top of the granulation nozzle 1. The rotating shaft 4 passes through the feed channel 6 and is fixedly connected to the bottom of the inner wall of the granulation nozzle 1. Multiple equally spaced spray holes 8 are opened on the surface of the granulation nozzle 1. An air pipe 9 is fixed to the surface of the mounting plate 2. The air pipe 9 passes through the feed channel 6 and enters the interior of the granulation nozzle 1. Multiple air jet pipes 10 are connected to the surface of the air pipe 9. A sliding groove 11 is opened on the surface of the mounting plate 2. A slider 12 is slidably connected to the surface of the sliding groove 11. A connecting rod 13 is slidably connected to the surface of the slider 12. The connecting rod 13 passes through the feed channel 6 and enters the interior of the granulation nozzle 1. A scraper 14 is fixed to the surface of the connecting rod 13. The scraper 14 is slidably connected to the inner wall of the granulation nozzle 1. Multiple mounting holes 5 are opened on the surface of the mounting plate 2. An air inlet connector 15 is connected to the top of the air pipe 9.

[0024] Through the above technical solution, the bottom of the granulation nozzle 1 is rotatably connected to the bottom of the horizontal plate inside the granulation tower. The mounting plate 2 is fixed above the horizontal plate through the mounting hole 5. The drive motor 3 can drive the granulation nozzle 1 to rotate through the rotating shaft 4. The raw material enters the granulation nozzle 1 through the feeding channel 6 and the feeding hopper 7. The rotation of the rotating shaft 4 causes the raw material to be evenly sprayed into the granulation tower through the spray hole 8 under the action of centrifugal force. The air inlet connector 15 is used to connect high-pressure gas. The high-pressure gas is sprayed into the spray hole 8 through the air pipe 9 and the jet pipe 10 to prevent the spray hole 8 from being blocked. When the granulation nozzle 1 rotates, the scraper 14 is slidably connected to the inner wall of the granulation nozzle 1, so that it can scrape the inner wall around the spray hole 8 and clean stubborn residual materials. This, together with the high-pressure gas cleaning, forms a double guarantee. Compared with the traditional nozzle device, this design significantly improves the anti-clogging ability, adapts to the granulation needs of high viscosity and easily crystallized materials, and improves the durability and production efficiency of the equipment.

[0025] The nozzle 8 has a diameter of 0.8-1.2 mm, and the inner diameter of the jet pipe 10 is 1.5-2 times that of the nozzle 8.

[0026] Through the above technical solution, the orifice diameter of the nozzle 8 is designed to be 0.8-1.2mm, which is more suitable for nitrogen, phosphorus and potassium fertilizer raw materials. It can ensure that the raw materials are sprayed into the granulation tower through the nozzle 8 at an appropriate flow rate and uniform distribution, forming a uniform droplet distribution, thereby improving the uniformity and quality of the particles. The inner diameter of the jet pipe 10 is 1.5-2 times that of the nozzle 8. This design can ensure that the high-pressure gas passes through the jet pipe 10 at a sufficient flow rate, forming a strong impact force when it is sprayed into the nozzle 8, cleaning the residual material inside the nozzle 8.

[0027] The inner wall of nozzle 8 is coated with an anti-stick coating, which is a polytetrafluoroethylene coating.

[0028] Through the above technical solution, the polytetrafluoroethylene coating on the inner wall of the nozzle 8 has extremely low surface energy and excellent anti-adhesion properties, which can effectively prevent the raw materials from sticking to the inner wall of the nozzle 8.

[0029] A guide plate 16 is fixed on the surface of the rotating shaft 4, and both the feed hopper 7 and the guide plate 16 are coated with a wear-resistant coating.

[0030] Through the above technical solution, the guide plate 16 is fixed on the surface of the rotating shaft 4 and rotates together with the granulation nozzle 1 to guide the flow of raw materials, so that the raw materials are evenly distributed under the action of centrifugal force and sprayed through the nozzle 8. The wear-resistant coating on the surface of the feed hopper 7 and the guide plate 16 can effectively resist the friction and impact generated during the flow of raw materials and reduce surface wear.

[0031] A spring 17 is fixed to one side of the inner wall of the slide 11, and one end of the spring 17 is fixedly connected to the surface of the slider 12.

[0032] Through the above technical solution, the spring 17 is used to provide elastic support force, which can buffer the impact force on the scraper 14 during the scraping process, so that the scraper 14 has a longer service life. At the same time, the elastic force of the spring 17 can keep the slider 12 in a stable position in the groove 11, ensuring the contact effect between the scraper 14 and the inner wall of the granulation nozzle 1.

[0033] A telescopic rod 18 is provided inside the spring 17. One end of the telescopic rod 18 is fixedly connected to the surface of the slide groove 11, and the other end of the telescopic rod 18 is fixedly connected to the surface of the slider 12.

[0034] Through the above technical solution, the telescopic rod 18 provides stable guidance and support for the sliding of the slider 12. The design of the telescopic rod 18 can limit the movement trajectory of the slider 12, ensuring that it slides in a straight line in the groove 11, and avoids deviation caused by vibration or impact.

[0035] Both the slider 12 and the connecting rod 13 have combination holes on their surfaces, and the slider 12 and the connecting rod 13 can be detachably connected by bolts through the combination holes.

[0036] Through the above technical solution, this design makes the connection between the connecting rod 13 and the slider 12 more flexible, and facilitates the maintenance and replacement of the scraper 14.

[0037] Its working principle is as follows: The bottom of the granulation nozzle 1 is rotatably connected to the bottom of the horizontal plate inside the granulation tower. The mounting plate 2 is fixed above the horizontal plate through the mounting hole 5. When the drive motor 3 starts, it drives the rotating shaft 4 to rotate, which in turn drives the granulation nozzle 1 to rotate. The raw material enters the granulation nozzle 1 through the feed hopper 7 and the feed channel 6. Under the action of centrifugal force, the raw material is evenly sprayed into the granulation tower through multiple spray holes 8 on the surface of the granulation nozzle 1, forming a uniform droplet distribution, and finally solidifying into granules. The air pipe 9 connects to the air inlet connector. High-pressure gas is introduced through the vent pipe 9 into the jet pipe 10 and sprayed at a sufficient flow rate into the nozzle 8 to clean the residual material inside the nozzle 8 and prevent clogging. During the rotation of the granulation nozzle 1, the scraper 14 can scrape the inner wall around the nozzle 8 to clean stubborn residual material, forming a double guarantee with the high-pressure gas cleaning. The spring 17 and the telescopic rod 18 provide elastic support and stable guidance for the slider 12, ensuring the scraping effect of the scraper 14, reducing downtime caused by clogging and improving production continuity.

[0038] It should be noted that, although specific embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these specific embodiments without departing from the principles and spirit, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A clog-resistant nozzle device for a nitrogen, phosphorus, and potassium fertilizer granulator, characterized in that: The assembly includes a granulation nozzle (1) and a mounting plate (2). A drive motor (3) is fixed to the top of the mounting plate (2). The output shaft of the drive motor (3) passes through the mounting plate (2) and is fixed to a rotating shaft (4). A feed hopper (7) is fixed above the surface of the granulation nozzle (1). A feed channel (6) is provided at the top of the granulation nozzle (1). The rotating shaft (4) passes through the feed channel (6) and is fixedly connected to the bottom of the inner wall of the granulation nozzle (1). Multiple equally spaced spray holes (8) are opened on the surface of the granulation nozzle (1). An air vent (9) is fixed to the surface of the mounting plate (2). The air vent (9) passes through the feed channel (6) and enters the granulation nozzle. Inside the granulation nozzle (1), the surface of the air pipe (9) is connected to multiple air jet pipes (10). The surface of the mounting plate (2) is provided with a sliding groove (11). A slider (12) is slidably connected to the surface of the sliding groove (11). A connecting rod (13) is slidably connected to the surface of the slider (12). The connecting rod (13) passes through the feed channel (6) and enters the interior of the granulation nozzle (1). A scraper (14) is fixed to the surface of the connecting rod (13). The scraper (14) is slidably connected to the inner wall of the granulation nozzle (1). The surface of the mounting plate (2) is provided with multiple mounting holes (5). The top of the air pipe (9) is connected to an air inlet connector (15).

2. The anti-clogging nozzle device for a nitrogen, phosphorus, and potassium fertilizer granulator according to claim 1, characterized in that: The nozzle (8) has a diameter of 0.8-1.2 mm, and the inner diameter of the jet pipe (10) is 1.5-2 times that of the nozzle (8).

3. The anti-clogging nozzle device for a nitrogen, phosphorus, and potassium fertilizer granulator according to claim 1, characterized in that: The inner wall of the nozzle (8) is coated with an anti-stick coating, which is a polytetrafluoroethylene coating.

4. The anti-clogging nozzle device for a nitrogen, phosphorus, and potassium fertilizer granulator according to claim 1, characterized in that: The rotating shaft (4) is fixed with a guide plate (16), and the surfaces of the feed hopper (7) and the guide plate (16) are coated with a wear-resistant coating.

5. The anti-clogging nozzle device for a nitrogen, phosphorus, and potassium fertilizer granulator according to claim 1, characterized in that: A spring (17) is fixed to one side of the inner wall of the slide (11), and one end of the spring (17) is fixedly connected to the surface of the slider (12).

6. The anti-clogging nozzle device for a nitrogen, phosphorus, and potassium fertilizer granulator according to claim 5, characterized in that: A telescopic rod (18) is provided inside the spring (17). One end of the telescopic rod (18) is fixedly connected to the surface of the slide groove (11), and the other end of the telescopic rod (18) is fixedly connected to the surface of the slider (12).

7. The anti-clogging nozzle device for a nitrogen, phosphorus, and potassium fertilizer granulator according to claim 1, characterized in that: Both the slider (12) and the connecting rod (13) have combination holes on their surfaces, and the slider (12) and the connecting rod (13) are detachably connected by bolts through the combination holes.

Images