A spray granulation device for magnesium sulfate processing and a method thereof

Abstract

The present application relates to the technical field of magnesium sulfate processing, and particularly relates to a spray granulation device for magnesium sulfate processing and a method thereof, a material liquid conveying mechanism, which comprises a feeding assembly arranged at the top of a vertical granulation tower, can adaptively adjust the air curtain air power, the solidification area air volume and the airflow direction according to the magnesium sulfate material liquid concentration and the target particle size, opens the air curtain and the air outlet passage under the high-concentration material liquid and large-particle working condition, lifts the airflow by lifting the air deflector, prolongs the particle residence time to ensure sufficient solidification and agglomeration, reduces the ventilation area under the conventional material liquid and medium-particle working condition, and lowers the air deflector to speed up the material passing, which takes into account the production efficiency, the upper vertical air curtain can continuously form protection to the spraying area, effectively inhibits the magnesium sulfate material liquid from precipitating microcrystals and adhering to the tower wall, the built-in spiral turbulent core can homogenize the material liquid in advance, avoids the pipeline and the first air outlet hole from being blocked, improves the uniformity and quality of the magnesium sulfate particle finished product, and adapts to the continuous granulation production demand of different specifications of magnesium sulfate products.

Description

Technical Field

[0001] This invention relates to the technical field of magnesium sulfate processing, and more particularly to a spray granulation apparatus and method for magnesium sulfate processing. Background Technology

[0002] Magnesium sulfate, as an important chemical raw material, is often produced into granular products using spray granulation. This process relies on the atomization of the feed solution and hot air drying and solidification to achieve granulation, and is widely used in chemical, building materials, and agricultural fields. However, existing equipment has some drawbacks: it cannot adjust the airflow of the air curtain, the airflow of the solidification zone, and the airflow direction according to the concentration of the magnesium sulfate feed solution and the target particle size. When producing large-diameter particles from high-concentration feed solutions, problems such as nozzle crystallization, material adhesion to the walls, and insufficient particle solidification easily occur. It is also difficult to accurately control the residence time of particles in the tower, making it impossible to simultaneously ensure product quality and production efficiency, and thus failing to meet the production needs of magnesium sulfate granules of various specifications. Summary of the Invention

[0003] The purpose of this invention is to provide a spray granulation device and method for magnesium sulfate processing, which solves the problems of existing magnesium sulfate spray granulation equipment being unable to flexibly adjust the air curtain volume and solidification airflow according to the concentration of the liquid and the particle size of the product, resulting in easy occurrence of nozzle crystallization, uneven liquid distribution and poor particle forming effect.

[0004] To achieve the above objectives, the present invention provides the following technical solution: A spray granulation device for magnesium sulfate processing includes: A vertical granulation tower, wherein the interior of the vertical granulation tower is hollow and a material discharge end is provided at the bottom; The material conveying mechanism includes a feeding assembly disposed at the top of the vertical granulation tower, a driving component disposed on the outside of the feeding assembly, and a spraying component disposed at the bottom of the feeding assembly. A hot air supply mechanism includes an atomizing component disposed above the inner side of the vertical granulation tower, and a curing component disposed in the middle of the inner side of the vertical granulation tower. The atomizing component includes a fixing ring fixedly connected to the inner side of the vertical granulation tower, an atomizing tube fixedly connected to the inner side of the fixing ring, and an air curtain hole opened at the bottom of the atomizing tube. The curing component includes a trapezoidal ring fixedly connected to the inner side of the vertical granulation tower. A curing pipe is fixedly connected to the bottom of the trapezoidal ring. Several vertical pipes are connected to the bottom of the curing pipe. A guide pipe is connected to the bottom of each of the vertical pipes. Several inclined first air outlet holes are opened from the inside to the outside of each of the vertical pipes. Both the atomizing tube and the curing tube are equipped with air supply pipes on their outer sides, and the air supply pipes extend to the outer side of the vertical granulation tower.

[0005] As a further description of the above solution: the feeding assembly includes a feeding pipe that runs through the interior of the vertical granulation tower from top to bottom. A stroke groove is provided on the inner side of the feeding pipe. A stroke block is slidably connected to the inner side of the stroke groove. A stroke pipe is fixedly connected to the side of the stroke block opposite to the feeding pipe.

[0006] As a further description of the above solution: the driving component includes a geared disc fixedly connected to the outside of the feed pipe, the surface of the geared disc is meshed with gears, the bottom of the gears is provided with a motor for transmission, and the bottom of the motor is fixedly connected to the top of the vertical granulation tower.

[0007] As a further description of the above solution: the spraying component includes a spraying ring fixedly connected to the bottom of the travel tube, a spiral turbulence core is provided on the inner side of the spraying ring, and a plurality of spraying heads are provided at the bottom of the spraying ring, with the plurality of spraying heads arranged circumferentially along the spraying ring.

[0008] As a further description of the above scheme: a rotating ring is fixedly connected to the outer side of the stroke tube, a limiting ring is rotatably connected to the outer side of the rotating ring, and electric push rods for transmission are provided at both ends of the top of the limiting ring. The top of the electric push rod is fixedly connected to the inner side of the vertical granulation tower. A lifting rod is also fixedly connected to the outer side of the limiting ring, and a compression spring is fixedly connected to the top of the lifting rod.

[0009] As a further description of the above solution: A connecting ring is provided on the upper part of the inner side of the vertical granulation tower. The bottom of the connecting ring is fixedly connected to the top of the compression spring. Several pull ropes are fixedly connected to the bottom of the connecting ring. Pulling blocks are fixedly connected to the inner sides of the pull ropes. Semi-circular rotating sleeves are fixedly connected to the inner sides of the pulling blocks. The inner side of the semi-circular rotating sleeves is rotatably connected to the outer side of the atomizing tube. Several guide blocks are also provided on the inner side of the vertical granulation tower. The pull ropes are arranged through the upper and lower sides of the guide blocks.

[0010] As a further description of the above scheme: a sliding plate is slidably connected to the surface of several vertical pipes, and air guide holes are opened on both the left and right sides of the sliding plate. The size of the air guide holes is the same as the size of the first air outlet hole. A limiting block is slidably connected to the outside of the sliding plate. The left side of the limiting block is fixedly connected to the outside of several vertical pipes. The bottom of the pull rope is fixedly connected to the top of the sliding plate.

[0011] As a further description of the above solution: the inner side of the air duct is provided with a plurality of second air outlets, and an air guide plate is provided on the right side of the second air outlets. The left and right sides of the air guide plate are rotatably connected to the outer side of the air duct through rotating blocks. A connecting rod is rotatably connected to the top of the air guide plate, and the outer side of the connecting rod is rotatably connected to the outer side of the sliding plate.

[0012] A spray granulation method for magnesium sulfate processing, comprising the following granulation steps: S1. The magnesium sulfate liquid is fed into the feeding assembly and atomized and sprayed downwards through the spraying component; S2. Turn on the external hot air of the atomizing component and blow out an annular hot air curtain through the air curtain hole to block the liquid from crystallizing and adhering to the inner wall of the tower. S3. Turn on the external hot air of the curing component, blow out hot air in layers, and cure the atomized droplets with hot air step by step. After forming magnesium sulfate granules, they are discharged from the feeding end.

[0013] It adapts to the processing needs of liquid materials of different concentrations and particles of different sizes, and adjusts the air volume of the air curtain, the air outlet angle and air outlet area of ​​the curing component in a coordinated manner, thereby controlling the residence time in the particle tower and completing the granulation processing of differentiated particle sizes.

[0014] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: 1. The air curtain force, curing zone air volume, and airflow direction can be adaptively adjusted according to the concentration of magnesium sulfate solution and the target particle size. Under high-concentration solution and large particle conditions, the air curtain and air outlet channel are opened larger, and the air guide plate is raised to form a lifting airflow, extending the particle residence time to ensure full curing and agglomeration. Under conventional solution and medium particle conditions, the ventilation area is reduced, and the air guide plate is tilted downward to accelerate material passage, taking into account production efficiency. The vertical air curtain above can continuously protect the spraying area, effectively inhibiting the precipitation of microcrystals and adhesion to the tower wall of magnesium sulfate solution. The built-in spiral turbulence core can homogenize the solution in advance, avoid blockage of pipelines and the first air outlet, improve the uniformity and quality of finished magnesium sulfate particles, and adapt to the continuous granulation production needs of magnesium sulfate products of different specifications.

[0015] 2. Corresponding wind force and airflow angle are matched for high-concentration and conventional-concentration magnesium sulfate solutions, which can effectively avoid the problem of nozzle crystallization during production and accurately control the particle residence time, ensuring that magnesium sulfate particles of different sizes are fully solidified, and can be adapted to the processing of multiple specifications of products. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein: Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0017] Figure 2 This is a cross-sectional schematic diagram of the vertical granulation tower provided by the present invention.

[0018] Figure 3This is a cross-sectional schematic diagram of the vertical granulation tower, liquid conveying mechanism, and hot air supply mechanism provided by the present invention.

[0019] Figure 4 This is a cross-sectional schematic diagram of the liquid conveying mechanism provided by the present invention.

[0020] Figure 5 This is a schematic diagram of the cooperation between the lifting rod and the compression spring provided by the present invention.

[0021] Figure 6 Provided for the present invention Figure 5 A magnified view of a portion of point D.

[0022] Figure 7 Provided for the present invention Figure 3 A magnified view of a portion of point A in the middle.

[0023] Figure 8 Provided for the present invention Figure 3 A magnified view of a portion of point B in the middle.

[0024] Figure 9 This is a schematic diagram showing the combination of the vertical pipe, sliding plate, and air guide plate provided by the present invention.

[0025] Figure 10 Provided for the present invention Figure 9 A magnified view of a portion of point E in the middle.

[0026] Figure 11 Provided for the present invention Figure 3 A magnified view of a portion of point C.

[0027] In the diagram: 100, Vertical granulation tower; 101, Discharge end; 200, Liquid conveying mechanism; 201, Feeding assembly; 201a, Feeding pipe; 201b, Stroke trough; 201c, Stroke block; 201d, Stroke pipe; 202, Drive component; 202a, Gear disc; 202b, Gear; 202c, Motor; 203, Spraying component; 203a, Spraying ring; 203b, Spiral turbulence core; 203c, Spraying head; 204, Rotating ring; 205, Restricting ring; 206, Electric push rod; 207, Lifting rod; 208, Compression spring; 300, Hot air supply mechanism; 301. Atomizing component; 301a. Fixing ring; 301b. Atomizing tube; 301c. Air curtain hole; 302. Curing component; 302a. Trapezoidal ring; 302b. Curing tube; 302c. Vertical tube; 302d. Air guide tube; 302e. First air outlet; 303. Air supply tube; 304. Connecting ring; 305. Pull rope; 306. Pulling block; 307. Semi-circular rotating sleeve; 308. Guide block; 309. Sliding plate; 310. Air guide hole; 311. Restricting block; 312. Second air outlet; 313. Air guide plate; 314. Rotating block; 315. Connecting rod. Detailed Implementation

[0028] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0029] Example 1 Reference Figures 1-11 The first embodiment of the present invention provides a spray granulation method for processing magnesium sulfate, the steps of which are as follows: S1. The magnesium sulfate liquid is fed into the feeding assembly 201 and atomized and sprayed downwards through the spraying component 203; S2. Turn on the external hot air of the atomizing component 301 and blow out an annular hot air curtain through the air curtain hole 301c to block the liquid from crystallizing and adhering to the inner wall of the tower. S3. Turn on the external hot air of the curing component 302, blow out hot air in layers, and cure the atomized droplets with hot air step by step. After forming magnesium sulfate particles, they are discharged from the feeding end 101.

[0030] It adapts to the processing needs of liquid materials of different concentrations and particles of different sizes, and adjusts the air volume of the air curtain, the air outlet angle and air outlet area of ​​the curing component 302 in conjunction with the adjustment of the residence time in the particle tower to complete the granulation processing of differentiated particle sizes.

[0031] Example 2 Reference Figures 1-6 This is the second embodiment of the present invention, which provides a liquid conveying mechanism 200.

[0032] Vertical granulation tower 100, the interior of vertical granulation tower 100 is hollow and the bottom is provided with a feeding end 101; The material conveying mechanism 200 includes a feeding assembly 201 disposed at the top of the vertical granulation tower 100, a driving component 202 disposed on the outside of the feeding assembly 201, and a spraying component 203 disposed at the bottom of the feeding assembly 201. The feeding assembly 201 includes a feeding pipe 201a that runs through the interior of the vertical granulation tower 100 from top to bottom. A stroke groove 201b is provided on the inner side of the feeding pipe 201a. A stroke block 201c is slidably connected to the inner side of the stroke groove 201b. A stroke pipe 201d is fixedly connected to the side of the stroke block 201c opposite to the feeding pipe 201a. The drive unit 202 includes a gear disk 202a fixedly connected to the outside of the feed pipe 201a. A gear 202b meshes with the surface of the gear disk 202a. A motor 202c for transmission is provided at the bottom of the gear 202b. The bottom of the motor 202c is fixedly connected to the top of the vertical granulation tower 100. The spraying component 203 includes a spraying ring 203a fixedly connected to the bottom of the stroke tube 201d. A spiral turbulence core 203b is provided on the inner side of the spraying ring 203a. Several spraying heads 203c are also provided at the bottom of the spraying ring 203a. The several spraying heads 203c are arranged circumferentially along the spraying ring 203a. A rotating ring 204 is fixedly connected to the outside of the stroke tube 201d. A limiting ring 205 is rotatably connected to the outside of the rotating ring 204. Both ends of the top of the limiting ring 205 are provided with electric push rods 206 for transmission. The top of the electric push rod 206 is fixedly connected to the inside of the vertical granulation tower 100. A lifting rod 207 is also fixedly connected to the outside of the limiting ring 205. A compression spring 208 is fixedly connected to the top of the lifting rod 207.

[0033] Specifically, by setting up the feeding component 201, the driving component 202 and the spraying component 203, the magnesium sulfate solution can be sheared and stirred after being put into the feeding pipe 201a, eliminating the problem of uneven solution concentration and improving the curing effect.

[0034] Furthermore, after the magnesium sulfate solution is fed into the feed pipe 201a, it flows into the stroke pipe 201d along the pipeline. The motor 202c drives the gear 202b to mesh with the gear disc 202a, thereby driving the stroke pipe 201d and the spray ring 203a to rotate. When the solution flows through the spiral turbulence core 203b inside the spray ring 203a, it is continuously sheared and stirred, eliminating the problem of uneven solution concentration. The homogenized solution is centrifugally thrown out from the circumferentially arranged spray heads 203c.

[0035] Example 3 Reference Figures 1-3 , Figures 5-11 This is the third embodiment of the present invention, which provides a hot air supply mechanism 300.

[0036] The hot air supply mechanism 300 includes an atomizing component 301 disposed above the inner side of the vertical granulation tower 100, and a curing component 302 disposed in the middle of the inner side of the vertical granulation tower 100. The atomizing component 301 includes a fixing ring 301a fixedly connected to the inner side of the vertical granulation tower 100, an atomizing tube 301b fixedly connected to the inner side of the fixing ring 301a, and an air curtain hole 301c opened at the bottom of the atomizing tube 301b. The curing component 302 includes a trapezoidal ring 302a fixedly connected to the inner side of the vertical granulation tower 100. A curing pipe 302b is fixedly connected to the bottom of the trapezoidal ring 302a. Several vertical pipes 302c are connected to the bottom of the curing pipe 302b. Air guide pipes 302d are connected to the bottom of each of the vertical pipes 302c. Several inclined first air outlet holes 302e are opened from the inside to the outside of each of the vertical pipes 302c. Both the atomizing tube 301b and the curing tube 302b are provided with an air supply pipe 303 on their outer sides, and the air supply pipe 303 extends to the outer side of the vertical granulation tower 100. A connecting ring 304 is provided on the upper inner side of the vertical granulation tower 100. The bottom of the connecting ring 304 is fixedly connected to the top of the compression spring 208. Several pull ropes 305 are fixedly connected to the bottom of the connecting ring 304. Pulling blocks 306 are fixedly connected to the inner side of each of the pull ropes 305. A semi-circular rotating sleeve 307 is fixedly connected to the inner side of the pulling block 306. The inner side of the semi-circular rotating sleeve 307 is rotatably connected to the outer side of the atomizing tube 301b. Several guide blocks 308 are also provided on the inner side of the vertical granulation tower 100. The pull ropes 305 are arranged through the upper and lower sides of the guide blocks 308. A sliding plate 309 is slidably connected to the surface of several vertical pipes 302c. Air guide holes 310 are opened on both the left and right sides of the sliding plate 309. The size of the air guide holes 310 is the same as the size of the first air outlet 302e. A limiting block 311 is slidably connected to the outside of the sliding plate 309. The left side of the limiting block 311 is fixedly connected to the outside of several vertical pipes 302c. The bottom of the pull rope 305 is fixedly connected to the top of the sliding plate 309. The inner side of the air duct 302d is provided with several second air outlets 312. A guide plate 313 is provided on the right side of the second air outlets 312. The left and right sides of the guide plate 313 are rotatably connected to the outer side of the air duct 302d through rotating blocks 314. A connecting rod 315 is rotatably connected to the top of the guide plate 313. The outer side of the connecting rod 315 is rotatably connected to the outer side of the sliding plate 309.

[0037] Specifically, external hot air is supplied to the atomizing tube 301b and the curing tube 302b through the air supply pipe 303. The hot air in the atomizing tube 301b is blown out from the bottom air curtain hole 301c to form a ring-shaped vertical air curtain that wraps around the spraying area to prevent magnesium sulfate droplets from crystallizing and adhering to the nozzle and tower wall. The hot air in the curing tube 302b flows into the vertical pipe 302c and the air guide pipe 302d in sequence, and is sent out from the inclined first air outlet 302e and the second air outlet 312 to dry and cure the falling droplets and particles.

[0038] Furthermore, when the electric push rod 206 drives the stroke tube 201d to rise and fall, it will simultaneously pull the pull rope 305. When the pull rope 305 moves under the limit of the guide block 308, on the one hand, it drives the semi-circular rotating sleeve 307 to rotate through the pull block 306, changing the shading area of ​​the air curtain hole 301c, thereby adjusting the airflow of the air curtain. On the other hand, the pull rope 305 drives the sliding plate 309 on the outside of the vertical tube 302c to slide up and down, so that the air guide hole 310 and the first air outlet hole 302e are staggered or overlapped, completing the adjustment of the air intake of the curing zone. At the same time as the sliding plate 309 moves, it pushes and pulls the air guide plate 313 through the connecting rod 315, causing the air guide plate 313 to deflect around the rotating block 314, changing the air outlet angle of the curing airflow, and finally realizing the synchronous adjustment of the air curtain airflow, curing airflow and airflow angle.

[0039] The remaining structure is the same as that in Example 2.

[0040] Example 4 Reference Figures 1-11 This is the fourth embodiment of the present invention, which differs from the third embodiment in that: this embodiment provides a spray granulation device for magnesium sulfate processing.

[0041] First, the magnesium sulfate solution to be processed is fed into the feed pipe 201a at the top of the vertical granulation tower 100. The solution flows into the stroke pipe 201d along the pipe. The top motor 202c starts to run. The gear 202b at the output end of the motor 202c meshes with the gear disc 202a on the outside of the feed pipe 201a, driving the stroke pipe 201d, the spray ring 203a and all the spray heads 203c at the bottom to rotate synchronously. When the solution flows through the spiral turbulence core 203b inside the spray ring 203a, it is continuously sheared and stirred by the spiral structure, effectively eliminating problems such as uneven concentration and pressure fluctuations during the solution transportation process, and avoiding local abnormal viscosity of the solution causing blockage of the spray heads 203c. The homogenized magnesium sulfate solution is evenly thrown out from multiple spray heads 203c arranged circumferentially under the action of centrifugal force, forming a diffuse mist. While the atomization operation is being carried out simultaneously, constant-temperature hot air supplied by an external hot air source is introduced into the atomization tube 301b and the curing tube 302b through the air supply pipe 303 extending to the outside of the tower. The hot air inside the atomization tube 301b is continuously blown out from the bottom air curtain hole 301c, forming a ring-shaped vertical air curtain around the nozzle 203c, which completely wraps the atomization area to prevent magnesium sulfate droplets from precipitating microcrystals under high temperature conditions, and at the same time avoids wet droplets from directly adhering to the nozzle surface and the inner wall of the vertical granulation tower 100. When the production conditions need to be switched, the staff starts the electric push rod 206. The extension and retraction of the electric push rod 206 drives the limiting ring 205 and the lifting rod 207 to move up and down. The compression spring 208 connected to the lifting rod 207 deforms accordingly. Utilizing the elastic buffering and flexible transmission characteristics of the compression spring 208, even if the connecting ring 304 cannot continue to move upward due to the tower structure limit, the stroke tube 201d and the spray ring 203a can still complete the lifting and lowering actions normally under the drive of the electric push rod 206. During the lifting and lowering process of the lifting rod 207, the connecting ring 304 will move synchronously. The connecting ring 304 pulls multiple sets of pull ropes 305. Under the limiting constraint of the guide block 308, the pull ropes 305 maintain vertical and stable displacement. One pull rope 305 drives the semi-circular rotating sleeve 307 to rotate outside the atomizing tube 301b through the pulling block 306, changing the blocking area of ​​the semi-circular rotating sleeve 307 on the air curtain hole 301c, thereby adjusting the effective air outlet area of ​​the air curtain hole 301c in real time and realizing the switching of the air curtain wind force. Furthermore, the bottom of the pull rope 305 synchronously drives the sliding plate 309 to move up and down on the surface of the vertical pipe 302c, so that the air guide hole 310 on the sliding plate 309 completely overlaps or partially intersects with the inclined first air outlet 302e on the surface of the vertical pipe 302c, thereby adjusting the overall air intake of the curing pipe 302b. At the same time, during the sliding process, the sliding plate 309 will push and pull the air guide plate 313 through the connecting rod 315. The air guide plate 313 will be deflected at an angle by means of the rotating blocks 314 on both sides, changing the flow direction of the hot air blown out from the vertical pipe 302c, the first air outlet 302e, the air guide pipe 302d and the second air outlet 312. When processing high-concentration magnesium sulfate solution to produce large-diameter particles, the semi-circular rotating sleeve 307 completely avoids the air curtain hole 301c, and the air curtain hole 301c is fully open to increase the air curtain force, enhance the anti-crystallization and anti-sticking effect of the nozzle, and the sliding plate 309 makes the air guide hole 310 completely overlap with the first air outlet hole 302e, and the flow area of ​​the solidification tube 302b reaches the maximum. With the air guide plate 313 deflecting upward, the hot air forms an upward lifting airflow, prolonging the residence time of droplets and particles in the middle area of ​​the tower, allowing the particles to fully agglomerate and solidify deeply, and ensuring the forming quality of large-diameter particles. When processing medium-sized particles from conventional concentration liquid, the semi-circular rotating sleeve 307 partially blocks the air curtain hole 301c to reduce the air curtain force, and the sliding plate 309 partially blocks the first air outlet hole 302e to reduce the air volume in the curing zone. The air guide plate 313 deflects downwards simultaneously, and the hot air forms a downward boosting airflow to accelerate the falling speed of the particles, thereby improving the overall production efficiency while ensuring the curing effect.

[0042] In summary, the setup of the liquid conveying mechanism 200 and the hot air supply mechanism 300 can improve the uniformity and quality of the finished magnesium sulfate granules, adapting to the continuous granulation production needs of magnesium sulfate products of different specifications.

[0043] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A spray granulation device for magnesium sulfate processing, characterized in that, include: A vertical granulation tower (100) has a hollow interior and a discharge end (101) at the bottom. The material conveying mechanism (200) includes a feeding assembly (201) disposed at the top of the vertical granulation tower (100), a driving component (202) disposed on the outside of the feeding assembly (201), and a spraying component (203) disposed at the bottom of the feeding assembly (201). The hot air supply mechanism (300) includes an atomizing component (301) disposed above the inner side of the vertical granulation tower (100), and a curing component (302) is also disposed in the middle of the inner side of the vertical granulation tower (100). The atomizing component (301) includes a fixing ring (301a) fixedly connected to the inner side of the vertical granulation tower (100), and an atomizing tube (301b) fixedly connected to the inner side of the fixing ring (301a). An air curtain hole (301c) is opened at the bottom of the atomizing tube (301b). The curing component (302) includes a trapezoidal ring (302a) fixedly connected to the inner side of the vertical granulation tower (100). A curing tube (302b) is fixedly connected to the bottom of the trapezoidal ring (302a). A plurality of vertical pipes (302c) are connected to the bottom of the plurality of vertical pipes (302c). A guide pipe (302d) is connected to the bottom of each of the plurality of vertical pipes (302c). A plurality of inclined first air outlet holes (302e) are opened from the inside to the outside of each of the plurality of vertical pipes (302c). Both the atomizing tube (301b) and the curing tube (302b) are provided with an air supply pipe (303) on their outer sides, and the air supply pipe (303) extends to the outer side of the vertical granulation tower (100).

2. The spray granulation device for magnesium sulfate processing according to claim 1, characterized in that: The feeding assembly (201) includes a feeding pipe (201a) that runs from top to bottom through the interior of the vertical granulation tower (100). A stroke groove (201b) is provided on the inner side of the feeding pipe (201a). A stroke block (201c) is slidably connected to the inner side of the stroke groove (201b). A stroke pipe (201d) is fixedly connected to the side of the stroke block (201c) opposite to the feeding pipe (201a).

3. The spray granulation device for magnesium sulfate processing according to claim 2, characterized in that: The drive component (202) includes a gear disc (202a) fixedly connected to the outside of the feed pipe (201a). A gear (202b) meshes with the surface of the gear disc (202a). A motor (202c) for transmission is provided at the bottom of the gear (202b). The bottom of the motor (202c) is fixedly connected to the top of the vertical granulation tower (100).

4. The spray granulation apparatus for magnesium sulfate processing according to claim 3, characterized in that: The spraying component (203) includes a spraying ring (203a) fixedly connected to the bottom of the travel tube (201d). A spiral turbulence core (203b) is provided on the inner side of the spraying ring (203a). A plurality of spraying heads (203c) are also provided at the bottom of the spraying ring (203a). The plurality of spraying heads (203c) are arranged circumferentially along the spraying ring (203a).

5. The spray granulation apparatus for magnesium sulfate processing according to claim 4, characterized in that: A rotating ring (204) is fixedly connected to the outside of the stroke tube (201d). A limiting ring (205) is rotatably connected to the outside of the rotating ring (204). Both ends of the top of the limiting ring (205) are provided with electric push rods (206) for transmission. The top of the electric push rod (206) is fixedly connected to the inside of the vertical granulation tower (100). A lifting rod (207) is also fixedly connected to the outside of the limiting ring (205). A compression spring (208) is fixedly connected to the top of the lifting rod (207).

6. The spray granulation apparatus for magnesium sulfate processing according to claim 5, characterized in that: A connecting ring (304) is provided on the upper inner side of the vertical granulation tower (100). The bottom of the connecting ring (304) is fixedly connected to the top of the compression spring (208). Several pull ropes (305) are fixedly connected to the bottom of the connecting ring (304). Pulling blocks (306) are fixedly connected to the inner side of each of the pull ropes (305). A semi-circular rotating sleeve (307) is fixedly connected to the inner side of the pulling block (306). The inner side of the semi-circular rotating sleeve (307) is rotatably connected to the outer side of the atomizing tube (301b). Several guide blocks (308) are also provided on the inner side of the vertical granulation tower (100). The pull ropes (305) are arranged through the upper and lower sides of the guide blocks (308).

7. The spray granulation apparatus for magnesium sulfate processing according to claim 6, characterized in that: A sliding plate (309) is slidably connected to the surface of several vertical pipes (302c). Air guide holes (310) are provided on both the left and right sides of the sliding plate (309). The size of the air guide holes (310) is the same as that of the first air outlet (302e). A limiting block (311) is slidably connected to the outside of the sliding plate (309). The left side of the limiting block (311) is fixedly connected to the outside of several vertical pipes (302c). The bottom of the pull rope (305) is fixedly connected to the top of the sliding plate (309).

8. The spray granulation apparatus for magnesium sulfate processing according to claim 7, characterized in that: The inner side of the air duct (302d) is provided with a plurality of second air outlets (312). A guide plate (313) is provided on the right side of the second air outlets (312). The left and right sides of the guide plate (313) are rotatably connected to the outer side of the air duct (302d) through a rotating block (314). A connecting rod (315) is rotatably connected to the top of the guide plate (313). The outer side of the connecting rod (315) is rotatably connected to the outer side of the sliding plate (309).

9. A spray granulation method for magnesium sulfate processing, utilizing the spray granulation apparatus for magnesium sulfate processing according to any one of claims 1 to 8, characterized in that, Includes the following steps: S1. The magnesium sulfate liquid is fed into the feeding assembly (201) and atomized and sprayed downwards through the spraying component (203); S2. Turn on the atomizing component (301) to connect to external hot air, and blow out an annular hot air curtain through the air curtain hole (301c) to block the liquid from crystallizing and adhering to the inner wall of the tower. S3. Turn on the curing component (302) to connect to the external hot air, blow out hot air in layers, and cure the atomized droplets with hot air step by step. After forming magnesium sulfate particles, they are discharged from the feeding end (101).

10. The spray granulation method for magnesium sulfate processing according to claim 9, characterized in that: It adapts to the processing needs of different concentrations of liquid materials and different particle sizes, and adjusts the air volume of the air curtain, the air outlet angle and air outlet area of ​​the curing component (302) in conjunction with the adjustment of the residence time in the particle tower to complete the granulation processing of different particle sizes.

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