High-tower compound fertilizer airflow jet granulator

Abstract

The invention relates to the technical field of high-tower compound fertilizer granulation, in particular to a high-tower compound fertilizer airflow jet granulator. The device comprises a discharging pipe, an outer rotating shaft, a rotating driving mechanism, a spraying cup and a distributing device, the discharging pipe is rotatably sleeved with the outer rotating shaft, the rotating driving mechanism is in driving connection with the outer rotating shaft, the distributing device is located in the spraying cup, and the spraying cup and the distributing device are both fixedly connected with the bottom of the outer rotating shaft; and a compressed air pipe communicated with the blanking pipe is arranged on one side above the blanking pipe. The spray cup is simple in structure, high in efficiency and uniform in discharge.

Description

Technical Field

[0001] This invention relates to the field of high-tower compound fertilizer granulation technology, specifically a high-tower compound fertilizer air jet granulator. Background Technology

[0002] High-tower granulation is a common piece of equipment in compound fertilizer production. Its principle is that slurry is sprayed from a rotating spray cup and, during its descent, is affected by factors such as airflow and gravity, forming granules. However, existing high-tower compound fertilizer granulators are inefficient, have uneven spray cup output, are prone to clogging, and have complex structures. For example, Chinese invention patent CN208340664U discloses a novel high-tower granulator, which includes a granulator body and an outer rotating shaft disposed within the granulator body. An inner rotating shaft is fitted inside the outer rotating shaft. A drive motor for driving the outer and inner rotating shafts to rotate is disposed at the top of the granulator body. A feed seat is disposed at the bottom of the granulator body, and a granulation nozzle is disposed below the feed seat. The outer and inner rotating shafts pass through the feed seat and are disposed within the granulation nozzle. The outer rotating shaft includes an upper rotating shaft disposed inside the granulator body and a lower rotating shaft disposed below the upper rotating shaft. A bearing seat for supporting the inner rotating shaft is disposed between the upper and lower rotating shafts. The upper rotating shaft, lower rotating shaft, and bearing seat are fixed together by bolts. The inner and outer shaft structure design of this patent is complex, resulting in high usage and maintenance costs. Summary of the Invention

[0003] To address the shortcomings of the existing technology, this invention provides a high-tower compound fertilizer air jet granulator with simple structure, high efficiency, and uniform spray cup discharge.

[0004] The technical solution adopted by this invention to solve its technical problem is:

[0005] A high-tower compound fertilizer air jet granulator includes a feeding pipe, an outer rotating shaft, a rotary drive mechanism, a spray cup, and a distributor. The outer rotating shaft is rotatably mounted on the feeding pipe. The rotary drive mechanism is drivenly connected to the outer rotating shaft. The distributor is located inside the spray cup, and both the spray cup and the distributor are fixedly connected to the bottom of the outer rotating shaft. A compressed air pipe communicating with the upper side of the feeding pipe is provided.

[0006] As a preferred embodiment of the spray cup, the sidewall of the spray cup is a perforated plate. The bottom of the spray cup is a sealing plate. The slurry is sprayed out from the sidewall of the spray cup.

[0007] To ensure that the slurry sprayed from the feed pipe is evenly dispersed within the spray cup, the distributor further includes an upper flange, a base plate, and several circumferentially arranged diverter plates connecting the upper flange and the base plate. The slurry is evenly distributed through the diverter plates.

[0008] To prevent the material from concentrating at the bottom of the spray cup, a separator was further designed based on the above scheme. A distributor was installed at the bottom of the feed pipe, and a discharge port was provided on the side wall of the distributor. The slurry was sprayed out from the discharge port on one side of the distributor, so that the outward extrusion pressure of the slurry at the upper and lower ends of the spray cup was approximately the same.

[0009] To further prevent clogging of the perforated plate, the mesh openings on the plate are funnel-shaped, gradually increasing in size from the inside out. This funnel-shaped design prevents slurry accumulation within the mesh openings, thus avoiding clogging. Furthermore, the mesh openings are angled along the direction of rotation of the spray cup, allowing the slurry to flow smoothly and further enhancing its anti-clogging performance.

[0010] The beneficial effects of this invention are: it drives the spray cup and distributor to rotate via an external rotating shaft, resulting in a simple structure; combined with high-pressure gas, it achieves more uniform slurry spraying, increasing production. The distributor and spray cup are easy to install and disassemble, facilitating cleaning and maintenance. The distributor has a simple structure and is not easily damaged. The funnel-shaped structure and inclined setting of the mesh holes on the perforated plate greatly improve the slurry throughput and prevent mesh clogging. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0012] Figure 2 This is a three-dimensional structural diagram of the fabric feeder of the present invention;

[0013] Figure 3 This is a schematic diagram of the first embodiment of the mesh of the spray cup of the present invention;

[0014] Figure 4 This is a schematic diagram of a second embodiment of the mesh of the spray cup of the present invention;

[0015] Figure 5 This is a schematic diagram of the shunt structure of the present invention;

[0016] In the diagram, the components are: 1. Feed pipe; 2. Outer shaft; 201. Flange; 3. Rotary drive mechanism; 301. Motor; 302. Gear set; 4. Spray cup; 401. Mesh plate; 4011. Mesh; 4012. Fabric distributor; 5. Upper flange; 501. Base plate; 502. Diverter plate; 503. Compressed air pipe; 6. Diverter; 7. Discharge port; 701. Outer shell; 8. Bearing; 9. Detailed Implementation

[0017] To enable those skilled in the art to better understand the present invention, the appendices in the embodiments of the present invention will be described below. Figure 1-5The technical solutions in the embodiments of the present invention are clearly and completely described herein. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0018] First embodiment:

[0019] The high-tower compound fertilizer air jet granulator of the present invention includes a feeding pipe 1, an outer rotating shaft 2, a rotary drive mechanism 3, a spray cup 4, and a distributor 5. It should be noted that structures not shown in the figures or mentioned below are prior art and will not be described in detail here.

[0020] A bearing is provided between the outer rotating shaft 2 and the feed pipe 1. The outer rotating shaft 2 is rotatably mounted on the feed pipe 1, while the feed pipe 1 is fixed and does not rotate. The outer rotating shaft 2 is fixed to the outer casing 8 by a bearing 9. The selection and specific installation method of the bearing 9 are conventional choices made by those skilled in the art based on the specific structure, and will not be elaborated further. The shape of the outer casing 8 is not limited here; the figure is only for illustrative purposes. The rotary drive mechanism 3 includes a motor 301 and a gear set 302. The rotary drive mechanism 3 is driven by the outer rotating shaft 2, driving the outer rotating shaft 2 to rotate. The material distributor 5 is located inside the spray cup 4. A flange 201 is provided at the bottom of the outer rotating shaft 2, and flanges are also provided at the upper ends of the material distributor 5 and the outer rotating shaft 2. Both the spray cup 4 and the material distributor 5 are fixedly connected to the flange 201 at the bottom of the outer rotating shaft 2. A compressed air pipe 6 is provided above the feed pipe 1 and communicates with it. The upper end of the feed pipe 1 is connected to the feed pipe.

[0021] The spray cup 4 has an open top and a flange on its outer side. The bottom of the spray cup 4 is a sealing plate, and the sidewall is a perforated plate 401 with evenly distributed perforations. Slurry flows out through these perforations. The distributor 5 includes an upper flange 501, a base plate 502, and several circumferentially arranged diverter plates 503 connecting the upper flange 501 and the base plate 502. The upper flange 501, base plate 502, and diverter plates 503 are welded together. The diameter of the upper flange 501 is larger than that of the base plate 502. The diverter plates 503 slope inwards from top to bottom. Figure 2 As shown, several diverter plates 503 form a conical structure.

[0022] Second embodiment:

[0023] Based on the first embodiment described above, in order to alleviate the problem of slurry sprayed from the feed pipe 1 directly hitting the bottom of the distributor 5, and the fact that the slurry sprayed outward from the upper side wall of the spray cup 4 has a weak force, which can easily clog the mesh over time, this invention provides a diversion device at the bottom of the feed pipe 1. Specifically, as shown... Figure 1 and Figure 5As shown, a distributor 7 is provided at the bottom of the feed pipe 1, and a discharge port 701 is provided on the side wall of the distributor 7. After the slurry is sprayed out from the feed pipe 1, it is sprayed out from the discharge port 701 of the distributor 7 and moves directly towards the side wall of the spray cup 4. Figure 5 The diverter 7 shown is only one embodiment, and those skilled in the art can design it into different shapes as needed. In this embodiment, the diverter 7 is designed to be detachable and installable with the feed pipe 1, and the two can be connected by a threaded connection. Of course, the diverter 7 can also be integrally formed with the feed pipe 1.

[0024] Third embodiment:

[0025] Traditional spray cup 4 has straight mesh holes on its sidewalls. During use, some mesh holes often become clogged. When the clogged area is large, the spray cup 4 needs to be disassembled for cleaning and unclogging. To avoid clogging, such as... Figure 3 As shown, the mesh 4011 on the perforated plate 401 is designed as a trumpet shape that gradually increases in size from the inside out. Furthermore, based on this embodiment, the mesh can be further designed to achieve a better anti-clogging effect, specifically as follows... Figure 4 As shown, the mesh 4012 is inclined along the rotation direction of the spray cup, and the slurry is sprayed out from the mesh accordingly. Through the above-mentioned mesh structure design, the clogging rate of the mesh is greatly reduced.

[0026] It should be noted that although this specification describes the embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A high tower compound fertilizer pneumatic jet granulator, characterized in that: It includes a feeding pipe, an outer rotating shaft, a rotating driving mechanism, a spraying cup and a distributor, the outer rotating shaft is rotatably sleeved on the feeding pipe, the rotating driving mechanism is drivingly connected with the outer rotating shaft, the distributor is located in the spraying cup, and the spraying cup and the distributor are fixedly connected with the bottom of the outer rotating shaft; a compressed air pipe communicating with the feeding pipe is arranged on one side of the top of the feeding pipe.

2. A high tower compound fertilizer pneumatic jet granulator according to claim 1, characterized in that: The side wall of the spraying cup is a mesh plate.

3. A high tower compound fertilizer pneumatic jet granulator according to claim 1, characterized in that: The distributor comprises an upper flange plate, a bottom plate and a plurality of circumferentially arranged shunt plates connecting the upper flange plate and the bottom plate.

4. A high tower compound fertilizer pneumatic jet granulator according to any one of claims 1 to 3, characterized in that: A shunt device is arranged at the bottom of the feeding pipe, and a discharge port is arranged on the side wall of the shunt device.

5. A high tower compound fertilizer pneumatic jet granulator as claimed in claim 2, characterized in that: The mesh holes on the mesh plate are trumpet-shaped and gradually increase from inside to outside.

6. A high tower compound fertilizer pneumatic jet granulator as claimed in claim 5, characterized in that: The mesh holes are arranged in an inclined manner along the rotating direction of the spraying cup.

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