An inner and outer skin type prilling spray cup for chemical fertilizer production

Abstract

The utility model provides a kind of inner and outer skin type granulating spray cup for chemical fertilizer production, it is related to granulating spray cup field, including rack, coupling sleeve, spray net component and drive assembly, it is characterized in that, coupling sleeve includes sleeve body and the feed pipe connected in sleeve body lateral wall, sleeve body is provided with upper and lower passage pipe and guide material pipeline, the import of guide material pipeline is communicated with feed pipe;Spray net component is located below coupling sleeve, spray net component is connected with coupling sleeve by gland, spray net component includes inner spray net and outer spray net, both can rotate along opposite direction under the driving of drive assembly;The sleeve of connection inner spray net penetrates upper and lower passage pipe, sleeve is fixed with inner spray net inner wall by fixed disc, fixed disc is also connected with stirring blade;The utility model is disturbed by the turbulence shear of stirring blade through the shear of twice of inner spray net and outer spray net, it is applicable to the processing of thick slurry and dilute slurry, granulating forming rate is high, greatly reduces the return rate, improves production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of granulation spray cup technology, specifically to an inner and outer skin type granulation spray cup for fertilizer production. Background Technology

[0002] The high-tower compound fertilizer granulator is a molding machine that prepares compound fertilizer into specific shapes and sizes. The high-tower compound granulator consists of multiple parts, including a spray cup. Its principle is that the mixed slurry is sprayed and passes through the small holes on the side wall of the spray cup, where it naturally breaks into droplets, thus forming granules.

[0003] Currently, most of the existing spray cups commonly found on the market have the same structure as the one disclosed in the applicant's prior invention patent document (publication number CN113426369B). They have a scraper assembly inside the spray cup. When in use, the direction of rotation of the spray net is opposite to that of the scraper. The scraper drives the slurry to rotate and throws the slurry toward the inner wall of the spray net. The slurry flows out through the spray net holes. When the scraper scrapes the inner wall of the spray net, it cuts off the slurry. The slurry forms droplets in the spray net holes. The spray net rotates and throws the slurry droplets out. The slurry droplets leave the spray net and are thrown toward the outside of the outer surface of the side wall of the spray net.

[0004] The slurry mentioned here refers to a molten mixture of raw materials such as urea, potash fertilizer, and monoamine in a certain formula ratio, which is melted at high temperature. The consistency (flowability) of the slurry varies depending on the proportion of raw materials. The spray cup structure of the above-mentioned existing technology is mostly suitable for thick slurries, but not for thin slurries. When thin slurries are sprayed out of the above-mentioned spray cup for granulation, there will be difficulties in forming, poor particle appearance, low forming rate, and a lot of rework. In actual production, the rework rate is as high as 55%, which seriously affects production efficiency. Utility Model Content

[0005] This invention addresses the aforementioned problems in the prior art by providing an inner and outer skin type granulation spray cup for fertilizer production. It is applicable to both thin and thick slurries, and the slurry exhibits excellent formability and high forming rate when sprayed out of the spray cup for granulation, greatly reducing the return rate and improving production efficiency.

[0006] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A granulation spray cup with inner and outer skin for fertilizer production, comprising a frame, a connecting sleeve, a spray net assembly, and a drive assembly, characterized in that...

[0007] The connecting sleeve includes a sleeve body and a feed pipe connected to the side wall of the sleeve body. The sleeve body is fixed to the frame. The sleeve body is provided with an upper and lower channel pipe and a guide pipe. The inlet of the guide pipe is connected to the feed pipe.

[0008] The spray mesh assembly is located below the connecting sleeve. The spray mesh assembly is connected to the connecting sleeve through the pressure cap. The spray mesh assembly includes an inner spray mesh and an outer spray mesh. A preset gap is left between the outer wall of the inner spray mesh and the inner wall of the outer spray mesh. Both are cup-shaped structures with openings facing upwards. Multiple spray mesh holes are opened on the side walls of both. The outlet of the material guide pipe leads to the inner spray mesh. The inner spray mesh is connected to the pressure cap in a way that it can rotate relative to the connecting sleeve. The outer spray mesh is connected to the pressure cap in a way that it can rotate relative to the connecting sleeve.

[0009] The drive assembly is located above the connecting sleeve. The drive assembly includes a first drive and a second drive that are independent of each other. The output shaft of the first drive is connected to the outer spray net through a rotating shaft and is used to drive the outer spray net to rotate. The output shaft of the second drive is connected to the inner spray net through a sleeve and is used to drive the inner spray net to rotate. The rotation directions of the inner spray net and the outer spray net are opposite.

[0010] The sleeve is fitted outside the rotating shaft and passes through the upper and lower channel pipes. The lower part of the sleeve is fixed to the inner wall of the inner spray net by a fixing plate. The fixing plate is also connected to a stirring blade.

[0011] Furthermore, the upper part of the sleeve extends through the upper and lower channel tubes, the sleeve is rotatably connected to the frame via bearings, and the sleeve is connected to the output shaft of the second drive via a second transmission component.

[0012] Furthermore, the sleeve is located at the center of the inner spray net, and the fixing plate is fixedly connected to the bottom of the sleeve. The fixing plate is fixed to the inner wall of the inner spray net through the connecting rod on its outer periphery, and the center of the fixing plate is provided with a through hole for the rotating shaft to pass through.

[0013] Furthermore, the stirring blades are arranged in a ring array on the outer periphery of the fixed plate. The stirring blades are at a preset angle to the horizontal plane. One end of the stirring blade is fixed to the fixed plate, and the other end of the stirring blade extends toward and approaches the inner wall of the inner spray net.

[0014] Furthermore, the top end of the rotating shaft protrudes from the sleeve and is connected to the first drive.

[0015] Furthermore, the bottom end of the rotating shaft protrudes from the sleeve and is fixed to the bottom of the outer spray net.

[0016] Furthermore, the rotating shaft is rotatably connected to the frame via bearings, and the rotating shaft is connected to the output shaft of the first drive via a first transmission component.

[0017] Furthermore, the bottom of the rotating shaft is connected to the bottom of the inner spray net and the bottom of the outer spray net respectively through a bushing. The bushing is fitted on the bottom of the rotating shaft and fixed to the rotating shaft. The bushing passes through the bottom wall of the inner spray net, the bottom end of the bushing is fixed to the bottom of the outer spray net, and the periphery of the bushing is rotatably connected to the inner spray net.

[0018] Furthermore, both the first drive and the second drive are motors, and both transmission components (the first transmission component and the second transmission component) are transmission gears.

[0019] The beneficial effects of this utility model are:

[0020] 1. This utility model, by setting up a spraying mesh assembly composed of an inner spraying mesh and an outer spraying mesh, with the inner and outer spraying meshes driven by two independent driving components to rotate in opposite directions, and a stirring blade connected to a fixed plate inside the inner spraying mesh, avoids the use of a scraper assembly inside the spraying mesh assembly. The two shearing actions of the inner and outer spraying meshes, combined with the turbulent shearing of the stirring blades, make the spray cup structure of this utility model applicable to both thick and thin slurries. Moreover, the slurry sprayed out of the spray cup has excellent formability and high forming rate when granulated, greatly reducing the return rate and improving production efficiency.

[0021] 2. This utility model further improves the stability of the inner and outer spray nets when they rotate relative to each other by setting the rotating shaft and sleeve at specific positions, and the connection positions and relationships between the two and the inner spray net, outer spray net and fixed plate respectively, thereby ensuring the granulation quality. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0023] Figure 2 This is a top view schematic diagram of the connecting rod structure according to an embodiment of the present invention;

[0024] Figure 3 This is a top view of the structure of the stirring blade in one embodiment of the present invention;

[0025] In the diagram: 1. Frame, 2. Sleeve, 21. Upper and lower channel pipes, 3. Feed pipe, 4. Sleeve, 5. Inner spray net, 6. Outer spray net, 7. Motor, 8. Motor, 9. Rotating shaft, 10. Pressure cover, 11. Fixed plate, 12. Connecting rod, 13. Stirring blade, 14. Shaft sleeve. Detailed Implementation

[0026] The principles and features of this utility model are described below. The embodiments given are only used to explain this utility model and are not intended to limit the scope of this utility model.

[0027] like Figures 1-3 As shown, the fertilizer production inner and outer skin type granulation spray cup of this embodiment includes a frame 1, a connecting sleeve, a spray net assembly, and a drive assembly, wherein:

[0028] The connecting sleeve includes a sleeve body 2 and a feed pipe 3 connected to the side wall of the sleeve body 2. The sleeve body 2 is fixed to the frame 1. The sleeve body 2 is provided with independent upper and lower channel pipes 21 and a guide pipe (not shown in the figure). The inlet of the guide pipe is connected to the feed pipe 3.

[0029] The spray mesh assembly is located below the connecting sleeve. The spray mesh assembly is connected to the connecting sleeve through the pressure cap 10. The spray mesh assembly includes an inner spray mesh 5 and an outer spray mesh 6. A preset gap is left between the outer wall of the inner spray mesh 5 and the inner wall of the outer spray mesh 6. Both are cup-shaped structures with openings facing upwards. Multiple spray mesh holes are opened on the side walls of both, with the inner spray mesh side wall having large holes and the outer spray mesh side wall having small holes. The outlet of the material guide pipe leads to the inner spray mesh 5. The inner spray mesh 5 is connected to the pressure cap 10 in a way that allows it to rotate relative to the connecting sleeve. The outer spray mesh 6 is connected to the pressure cap 10 in a way that allows it to rotate relative to the connecting sleeve. Specifically, the pressure cap 10 is rotatably connected to the sleeve 2, the outer spray mesh 6 is fixed to the pressure cap 10, and the inner spray mesh 5 is rotatably connected to the pressure cap 10.

[0030] The drive assembly is located above the connecting sleeve. The drive assembly includes a first drive and a second drive that are independent of each other. Both of them use motors. The output shaft of the first drive is connected to the outer spray net 6 through the rotating shaft 9 and is used to drive the outer spray net 6 to rotate. The output shaft of the second drive is connected to the inner spray net 5 through the sleeve 4 and is used to drive the inner spray net 5 to rotate. The rotation directions of the inner spray net 5 and the outer spray net 6 are opposite.

[0031] The sleeve is fitted outside the rotating shaft 9 and passes through the upper and lower channel pipes 21. The lower part of the sleeve 4 is fixed to the inner wall of the inner spray net 5 through the fixing plate 11. The fixing plate 11 is also connected to the stirring blade 13. The stirring blade 13 is arranged in a ring array on the outer periphery of the fixing plate 11. The stirring blade 13 is at a certain angle to the horizontal plane. One end of the stirring blade 13 is fixed to the fixing plate 11, and the other end of the stirring blade 13 extends toward the inner wall of the inner spray net 5 and is close to the inner wall of the inner spray net 5.

[0032] The application scenario of this embodiment is to use slurry to spray granulation through a spray cup. The slurry is a molten mixture of raw materials such as urea, potassium fertilizer, and monoamine in a certain formula ratio after being melted at high temperature.

[0033] In use, the molten slurry enters the inner spray net 5 through the feed pipe 3 and the guide pipe of the granulator. The inner spray net 5 and the outer spray net 6 rotate in opposite directions under the drive of two motors (7 and 8). The inner spray net 5 rotates counterclockwise under the drive of the motor, causing the slurry inside to rotate at high speed. The stirring blade 13 plays a role in turbulence and shearing of the slurry inside the inner spray net 5. Under the action of centrifugal force, the slurry enters the gap between the inner and outer spray nets through the large holes of the inner spray net. Due to the relative rotation of the inner and outer spray nets, a high-pressure chamber is formed in this gap. The slurry in the high-pressure chamber is thrown out through the small holes of the outer spray net under the combined action of the reverse shearing of the inner spray net, the forward shearing of the outer spray net, and centrifugal force, and is cut by the outer spray net to form continuous fertilizer granules.

[0034] The spray cup structure of this embodiment is applicable to both thick and thin slurries. Moreover, the slurry has excellent formability and high forming rate when sprayed out of the spray cup for granulation, which greatly reduces the return rate and improves production efficiency, and is of great significance for reducing production costs.

[0035] Specifically, the sleeve 4 is located at the center of the inner spray net 5. The upper part of the sleeve 4 is connected through the upper and lower channel pipes. The sleeve 4 is rotatably connected to the frame 1 through the bearing. The outer side of the sleeve 4 is connected to the output shaft of the second drive through the transmission gear. The output shaft of the second drive is connected to the reducer. The output shaft of the reducer is then connected to the transmission gear fixed outside the sleeve 4 through the transmission gear (which is the prior art). The fixed plate 11 is fixedly connected to the bottom of the sleeve 4. The fixed plate 11 is fixed to the inner wall of the inner spray net 5 through multiple connecting rods 12 on its outer periphery. The connecting rods 12 are located on the lower side of the stirring blade. The fixed plate 11 has a through hole in the center for the rotating shaft 9 to pass through. The rotating shaft 9 passes through the center of the sleeve 4. The top of the rotating shaft 9 protrudes from the sleeve 4 and is rotatably connected to the frame 1 through a bearing. The outer circumference of the rotating shaft 9 is connected to the output shaft of the first drive through a transmission gear. The output shaft of the first drive is connected to a reducer. The output shaft of the reducer is then connected to a transmission gear (existing technology) fixed outside the rotating shaft 9 through a transmission gear. The bottom end of the rotating shaft 9 protrudes from the sleeve 4. The bottom of the rotating shaft 9 is connected to the bottom of the inner spray net 5 and the bottom of the outer spray net 6 through a bushing 14. The bushing 14 is fitted on the bottom of the rotating shaft 9 and fixed to the rotating shaft 9. The bushing 14 passes through the bottom wall of the inner spray net 5. The bottom end of the bushing 14 is fixed to the bottom of the outer spray net 6. The circumference of the bushing 14 is rotatably connected to the inner spray net 5.

[0036] The above-mentioned connection structure provides a specific installation scheme for "inner spray net and outer spray net rotating in opposite directions". That is, a rotating shaft and a sleeve are set, and the rotating shaft is connected to the outer spray net and the sleeve is connected to the inner spray net at a specific position. This helps to ensure the stability of the inner and outer spray nets when they rotate relative to each other, thereby ensuring the granulation quality.

Claims

1. A granulation spray cup with inner and outer skin for fertilizer production, comprising a frame (1), a connecting sleeve, a spray net assembly, and a drive assembly, characterized in that, The connecting sleeve includes a sleeve body (2) and a feed pipe (3) connected to the side wall of the sleeve body (2). The sleeve body (2) is fixed to the frame (1). The sleeve body (2) is provided with an upper and lower channel pipe (21) and a guide pipe. The inlet of the guide pipe is connected to the feed pipe (3). The spray mesh assembly is located below the connecting sleeve. The spray mesh assembly is connected to the connecting sleeve through the pressure cap (10). The spray mesh assembly includes an inner spray mesh (5) and an outer spray mesh (6). There is a preset gap between the outer wall of the inner spray mesh (5) and the inner wall of the outer spray mesh (6). Both are cup-shaped structures with openings facing upwards. Multiple spray mesh holes are opened on the side walls of both. The outlet of the material guide pipe leads to the inner spray mesh (5). The inner spray mesh (5) is connected to the pressure cap (10) in a way that it can rotate relative to the connecting sleeve. The outer spray mesh (6) is connected to the pressure cap (10) in a way that it can rotate relative to the connecting sleeve. The drive assembly is located above the connecting sleeve. The drive assembly includes a first drive and a second drive that are independent of each other. The output shaft of the first drive is connected to the outer spray net (6) through a rotating shaft (9) and is used to drive the outer spray net (6) to rotate. The output shaft of the second drive is connected to the inner spray net (5) through a sleeve (4) and is used to drive the inner spray net (5) to rotate. The rotation directions of the inner spray net (5) and the outer spray net (6) are opposite. The sleeve is fitted outside the rotating shaft (9) and passes through the upper and lower channel pipes. The lower part of the sleeve (4) is fixed to the inner wall of the inner spray net (5) through the fixing plate (11). The fixing plate (11) is also connected to the stirring blade (13).

2. The granulation spray cup for fertilizer production with inner and outer skins as described in claim 1, characterized in that, The upper part of the sleeve (4) passes through the upper and lower channel pipes (21). The sleeve (4) is rotatably connected to the frame (1) through the bearing. The sleeve (4) is connected to the output shaft of the second drive through the second transmission component.

3. The granulation spray cup for fertilizer production with inner and outer skins as described in claim 2, characterized in that, The sleeve (4) is located at the center of the inner spray net (5). The fixed plate (11) is fixedly connected to the bottom of the sleeve (4). The fixed plate (11) is fixed to the inner wall of the inner spray net (5) through the connecting rod (12) on its outer periphery. The fixed plate (11) has a through hole in the center for the rotating shaft (9) to pass through.

4. The granulation spray cup for fertilizer production with inner and outer skins as described in claim 1, characterized in that, The stirring blades (13) are arranged in a ring array on the outer periphery of the fixed plate (11). The stirring blades (13) are inclined at a preset angle to the horizontal plane. One end of the stirring blades (13) is fixed to the fixed plate (11), and the other end of the stirring blades (13) extends toward the inner wall of the inner spray net (5) and approaches the inner wall of the inner spray net (5).

5. The granulation spray cup for fertilizer production with inner and outer skins as described in claim 1, characterized in that, The top of the rotating shaft (9) protrudes from the sleeve (4) and is connected to the first drive.

6. The granulation spray cup for fertilizer production with inner and outer skins as described in claim 1 or 5, characterized in that, The bottom end of the rotating shaft (9) protrudes from the sleeve (4) and is fixed to the bottom of the outer spray net (6).

7. The granulation spray cup for fertilizer production with inner and outer skins as described in claim 6, characterized in that, The rotating shaft (9) is rotatably connected to the frame (1) through a bearing, and the rotating shaft (9) is connected to the output shaft of the first drive through a first transmission component.

8. The granulation spray cup for fertilizer production with inner and outer skins as described in claim 6, characterized in that, The bottom of the rotating shaft (9) is connected to the bottom of the inner spray net (5) and the bottom of the outer spray net (6) respectively through a bushing (14). The bushing (14) is fitted on the bottom of the rotating shaft (9) and fixed to the rotating shaft (9). The bushing (14) penetrates the bottom wall of the inner spray net (5). The bottom end of the bushing (14) is fixed to the bottom of the outer spray net (6). The circumference of the bushing (14) is rotatably connected to the inner spray net (5).

9. The granulation spray cup for fertilizer production with inner and outer skins as described in claim 2 or 7, characterized in that, The transmission component is a transmission gear.

10. The granulation spray cup for fertilizer production with inner and outer skins according to claim 1, characterized in that, Both the first drive and the second drive are electric motors.

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