A granulating device for preventing magnesium chloride from agglomerating

Abstract

The present invention discloses a granulation device for preventing magnesium chloride from agglomerating, wherein the extrusion strip device comprises an extrusion barrel, an extrusion piston, and a spiral heating tube, wherein an extrusion barrel bottom end is provided with an extrusion barrel, and the extrusion piston is nested and installed in the extrusion barrel in a relatively sliding manner, and the upper surface of the extrusion piston is dynamically connected with a first driving mechanism, and the middle section of the side wall of the extrusion barrel is connected with a feed pipe and an exhaust pipe, and the lower half of the inner wall of the extrusion barrel is wound with a spiral heating tube; a granulation cooling mechanism is arranged directly below the extrusion barrel, and the granulation cooling mechanism comprises an installation roller body, a turning mechanism, and a cold air conveying pipe, wherein the outer side wall of the installation roller body is provided with multiple groups of processing chambers, the cold air conveying pipe is arranged in the processing chamber, and the turning mechanism is matched and installed in each group of processing chambers, and the outer side wall of the installation roller body is solidified with a strip scraper plate in close contact with the extrusion barrel in an annular array; a screening mechanism is arranged directly below the granulation cooling mechanism. The present invention can effectively eliminate magnesium chloride agglomeration and improve the quality of magnesium chloride products.

Description

Technical Field

[0001] This invention relates to the field of magnesium chloride production equipment technology, specifically a granulation device for preventing magnesium chloride from agglomerating. Background Technology

[0002] Industrial magnesium chloride is a mixture of MgCl₂·4H₂O and MgCl₂·6H₂O. It is a raw material for the industrial production of various magnesium salts, used in the construction industry to manufacture magnesium cement and building components, in the metallurgical industry for the construction of steelmaking furnaces, and also widely used as a flame retardant, snow melter, refrigerant, cement antifreeze agent, and food additive for tofu making. Currently, most magnesium chloride production methods involve first evaporating and concentrating a magnesium chloride solution using various evaporation equipment to remove water and separate impurities with low solubility; then cooling and crystallizing to obtain the magnesium chloride product.

[0003] Due to its inherent properties, magnesium chloride is prone to caking when exposed to humid air during production or storage. Furthermore, traditional equipment used for magnesium chloride production is often inadequate in preventing caking, leading to substandard product quality. Therefore, it is necessary to design a magnesium chloride granulation device to effectively eliminate the caking problem during magnesium chloride production and significantly improve the quality of the magnesium chloride product. Summary of the Invention

[0004] In view of the above-mentioned shortcomings in the existing technology, the purpose of this invention is to provide a magnesium chloride granulation device that effectively eliminates magnesium chloride agglomeration and improves the quality of magnesium chloride products.

[0005] The technical solution adopted by the present invention to achieve the above objective is: a granulation device for preventing magnesium chloride from agglomerating, comprising an extrusion extrusion device, a granulation cooling mechanism, and a screening mechanism, wherein the discharge end of the extrusion extrusion device is installed in conjunction with the granulation cooling mechanism, and the screening mechanism is installed in conjunction with the bottom of the granulation cooling mechanism.

[0006] The extrusion device includes an extrusion cylinder, an extrusion piston, and a spiral heating tube. The extrusion cylinder is arranged vertically, and multiple sets of extrusion tubes are arranged in a straight line at the bottom end of the extrusion cylinder. The extrusion piston is nested in the extrusion cylinder in a relatively sliding manner, and the extrusion piston is in close contact with the inner wall of the extrusion cylinder. The upper surface of the extrusion piston is poweredly connected to a first driving mechanism, and the first driving mechanism drives the extrusion piston to move up and down. The middle section of the side wall of the extrusion cylinder is connected to a feed pipe and an exhaust pipe. The lower half of the inner wall of the extrusion cylinder is wound with a spiral heating tube.

[0007] The granulation cooling mechanism is located directly below the extrusion tube, and includes a mounting roller, a turning mechanism, and a cold air conveying pipe. The outer wall of the mounting roller has multiple sets of processing chambers arranged in a ring array. The cold air conveying pipe is located on the innermost side of the processing chamber. The turning mechanism is installed in each set of processing chambers, and each set of turning mechanisms is poweredly connected to a second drive mechanism. The outer wall of the mounting roller is fixed with strip scrapers that are in close contact with the extrusion tube in a ring array.

[0008] The screening mechanism is located directly below the granulation and cooling mechanism.

[0009] An installation bracket is also provided. The extrusion cylinder is fixedly installed on the installation bracket. The installation roller is nested on the installation bracket in a relatively rotating manner. The power shaft of the installation roller is powered by an electric motor, and the electric motor drives the installation roller to rotate stably.

[0010] A mounting plate is horizontally fixed to the top of the extrusion cylinder. An air pump is installed on the exhaust pipe and fixedly mounted on the mounting plate. A feed hopper is also fixedly mounted on the mounting plate, and the bottom of the feed hopper is connected to the feed pipe.

[0011] The mounting plate is also equipped with the first drive mechanism, which includes an adjusting screw, a drive disk, and a first drive motor. The adjusting screw passes through the mounting plate and is nested with the extrusion piston in a relatively rotating manner. The drive disk is nested on the mounting plate in a relatively rotating manner and is screwed to the adjusting screw. A first reversing gear is fixedly mounted on the drive disk. The first drive motor is fixedly mounted on the mounting plate and a second reversing gear is fixedly mounted on its rotating shaft. The first reversing gear and the second reversing gear are meshed and connected.

[0012] The inner side of the bottom end of the extrusion cylinder gradually narrows from top to bottom, and the lower surface of the extrusion piston is nested and matched with the bottom end of the extrusion cylinder.

[0013] The material turning mechanism includes a mounting shaft and a turning plate. The mounting shaft is nested in the processing cavity in a relatively rotating manner and is arranged along the extension direction of the mounting roller. The turning plate is fixedly mounted on the mounting shaft and distributed in a ring array. The turning plate fills the processing cavity and is in close contact with the side wall of the processing cavity.

[0014] The same end of each set of mounting shafts extends out of the outer end of the mounting roller body, and the extended part is poweredly connected to the second drive mechanism. The second drive mechanism includes a transmission sprocket and a second drive motor. A transmission sprocket is fixedly installed on the extended part of each set of mounting shafts. Each set of transmission sprockets is poweredly connected by a chain. A third reversing gear is fixedly installed on one set of mounting shafts. The second drive motor is fixedly installed on the outer end of the mounting roller body, and a fourth reversing gear is fixedly installed on its rotating shaft. The third reversing gear and the fourth reversing gear are meshed and connected.

[0015] Each group of cold air conveying pipes has multiple sets of cold air nozzles facing the outside of the processing chamber. The same end of each group of cold air conveying pipes extends out of the outer end of the mounting roller. A first annular mounting block is fixedly installed on the outer end of the mounting roller. A first annular mounting groove is provided on the first annular mounting block. The cold air conveying pipes extend out to the first annular mounting groove. A second annular mounting block is nested on the first annular mounting block in a relatively rotatable manner. A second annular mounting groove is provided on the second annular mounting block that matches the first annular mounting groove. A cold air inlet pipe is connected to the second annular mounting groove.

[0016] The screening mechanism includes a conveyor belt and a collection box. The upstream end of the conveyor belt is located directly below the granulation and cooling mechanism, and screening holes are evenly opened on the surface of the conveyor belt. The collection box is located between the upper and lower surfaces of the conveyor belt.

[0017] The beneficial effects of the present invention are as follows: During the rotation of each set of turning plates, granular magnesium chloride can be turned over into the processing chamber. The cold air output by the cold air conveying pipe can fully cool the granular magnesium chloride to generate solid magnesium chloride particles. Furthermore, the rotating turning plates can effectively prevent the magnesium chloride particles from clumping together. The cold air that has undergone heat exchange is also conveyed outward by the rotation of the turning plates.

[0018] When the magnesium chloride particles that have been cooled and cooled are rotated to the bottom, they fall from the processing chamber onto the conveyor belt and are transported and collected by the conveyor belt. Due to the setting of the screening holes on the conveyor belt surface, magnesium chloride particles that do not meet the particle size requirements can fall into the collection box for collection, avoiding the output of magnesium chloride particles that do not meet the requirements and helping to improve product quality. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the combined structure of the extrusion device and the granulation and cooling mechanism in this invention.

[0020] Figure 2 This is a schematic diagram of the structure of one side end of the mounting roller body described in this invention;

[0021] Figure 3This is a schematic diagram of the structure of the other end of the mounting roller body described in this invention;

[0022] Figure 4 This is a structural diagram of the combination of the first annular mounting block and the second annular mounting block in this invention;

[0023] Figure 5 This is a schematic diagram of the screening mechanism in this invention.

[0024] In the diagram: 1. Extrusion cylinder, 2. Extrusion piston, 3. Spiral heating tube, 4. Extrusion tube, 5. Feed tube, 6. Exhaust tube, 7. Mounting roller, 8. Cold air conveying tube, 9. Processing chamber, 10. Strip scraper, 11. Mounting plate, 12. Power shaft, 13. Air pump, 14. Feed hopper, 15. Adjusting screw, 16. Drive disc, 17. First drive motor, 18. First reversing gear, 19. Second reversing gear, 20. Mounting shaft, 21. Tilting plate, 22. Transmission sprocket, 23. Second drive motor, 24. Third reversing gear, 25. Fourth reversing gear, 26. First annular mounting block, 27. Second annular mounting block, 28. Cold air inlet pipe, 29. Conveyor belt, 30. Collection box. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. 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 are within the scope of protection of the present invention.

[0026] Example 1

[0027] Please see Figure 1-5 A granulation device for preventing magnesium chloride from agglomerating includes an extrusion device, a granulation cooling mechanism, and a screening mechanism. The discharge end of the extrusion device is installed in conjunction with the granulation cooling mechanism, and the bottom of the granulation cooling mechanism is equipped with a screening mechanism.

[0028] The extrusion extrusion device includes an extrusion cylinder 1, an extrusion piston 2, and a spiral heating tube 3. The extrusion cylinder 1 is arranged vertically, and multiple sets of extrusion tubes 4 are arranged in a straight line at the bottom end of the extrusion cylinder 1. The extrusion piston 2 is nested in the extrusion cylinder 1 in a relatively sliding manner, and the extrusion piston 2 is in close contact with the inner wall of the extrusion cylinder 1. The upper surface of the extrusion piston 2 is poweredly connected to a first drive mechanism, and the first drive mechanism drives the extrusion piston 2 to move up and down. The middle section of the side wall of the extrusion cylinder 1 is connected to a feed pipe 5 and an exhaust pipe 6. The lower half of the inner wall of the extrusion cylinder 1 is wound with a spiral heating tube 3.

[0029] The granulation cooling mechanism is located directly below the extrusion tube 4, and includes a mounting roller 7, a turning mechanism, and a cold air conveying pipe 8. The outer side wall of the mounting roller 7 has multiple sets of processing chambers 9 arranged in a ring array. The cold air conveying pipe 8 is located at the innermost side of the processing chamber 9. The turning mechanism is installed in each set of processing chambers 9, and each set of turning mechanisms is poweredly connected to a second drive mechanism. The outer side wall of the mounting roller 7 is fixed with strip scrapers 10 that are in close contact with the extrusion tube 4 in a ring array.

[0030] The screening mechanism is located directly below the granulation and cooling mechanism.

[0031] Example 2

[0032] Please see Figure 1 The extrusion sheet device will be further described in detail in conjunction with Example 1:

[0033] An installation bracket is also provided. The extrusion cylinder 1 is fixedly installed on the installation bracket. The installation roller 7 is nested on the installation bracket in a relatively rotating manner. The power shaft 12 of the installation roller 7 is powered by an electric motor, and the electric motor drives the installation roller 7 to rotate stably, ensuring the stable installation of the extrusion strip device and the granulation cooling mechanism.

[0034] A mounting plate 11 is horizontally fixed to the top of the extrusion cylinder 1. An air pump 13 is installed on the exhaust pipe 6 and is fixedly mounted on the mounting plate 11 to facilitate the discharge of water vapor evaporated by heating in the extrusion cylinder 1. A feed hopper 14 is also fixedly mounted on the mounting plate 11, and the bottom end of the feed hopper 14 is connected to the feed pipe 5. The material to be added is fed into the extrusion cylinder 1 through the feed hopper 14.

[0035] The mounting plate 11 is also equipped with a first drive mechanism, which includes an adjusting screw 15, a drive disk 16, and a first drive motor 17. The adjusting screw 15 passes through the mounting plate 11 and is nested with the extrusion piston 2 in a relatively rotatable manner. The drive disk 16 is nested on the mounting plate 11 in a relatively rotatable manner and is screwed to the adjusting screw 15. A first reversing gear 18 is fixedly mounted on the drive disk 16. The first drive motor 17 is fixedly mounted on the mounting plate 11 and a second reversing gear 19 is fixedly mounted on its rotating shaft. The first reversing gear 18 and the second reversing gear 19 are meshed and connected. The first drive motor 17 drives the second reversing gear 19 to rotate, which in turn drives the first reversing gear 18 and the drive disk 16 fixed to the first reversing gear 18 to rotate, thereby driving the adjusting screw 15 to move up and down, and in turn driving the extrusion piston 2 to move up and down along the extrusion cylinder 1, so as to extrude the concentrated magnesium chloride that has been evaporated and concentrated through the extrusion tube 4.

[0036] The inner side of the bottom end of the extrusion cylinder 1 gradually narrows from top to bottom, and the lower surface of the extrusion piston 2 is nested and matched with the bottom end of the extrusion cylinder 1 body to ensure that the concentrated magnesium chloride is stably extruded through the extrusion tube 4.

[0037] Example 3

[0038] Please see Figure 1-4 In conjunction with Examples 1-2, the granulation cooling mechanism of the present invention will be further described in detail:

[0039] The material turning mechanism includes a mounting shaft 20 and a turning plate 21. The mounting shaft 20 is nested in the processing chamber 9 in a relatively rotatable manner and is arranged along the extension direction of the mounting roller 7. The turning plate 21 is fixedly mounted on the mounting shaft 20 and is distributed in a ring array. The turning plate 21 fills the processing chamber 9 and is in close contact with the side wall of the processing chamber 9. The mounting shaft 20 drives the turning plate 21 to rotate, so as to fully cool and turn the granular magnesium chloride in the processing chamber 9 to avoid clumping.

[0040] Each set of mounting shafts 20 has a common end that extends out of the outer end of the mounting roller body 7, and the extended portion is poweredly connected to a second drive mechanism. The second drive mechanism includes a transmission sprocket 22 and a second drive motor 23. The transmission sprocket 22 is fixedly mounted on the extended portion of each set of mounting shafts 20, and the transmission sprockets 22 are poweredly connected by a chain. A third reversing gear 24 is fixedly mounted on one set of mounting shafts 20. The second drive motor 23 is fixedly mounted on the outer end of the mounting roller body 7, and a fourth reversing gear 25 is fixedly mounted on its rotating shaft. The third reversing gear 24 and the fourth reversing gear 25 are meshed together. The second drive motor 23 drives the fourth reversing gear 25 to rotate, which in turn drives the third reversing gear 24 and the transmission sprocket 22 fixed to the third reversing gear 24 to rotate. Since the transmission sprockets 22 are poweredly connected by a chain, the stable rotation of each set of transmission sprockets 22 and the mounting shaft 20 fixedly connected to the transmission sprockets 22 can be ensured, thus ensuring the stable flipping of each set of material turning mechanisms.

[0041] Each set of cold air delivery pipes 8 has multiple sets of cold air nozzles facing the outside of the processing chamber 9. The same end of each set of cold air delivery pipes 8 extends to the outside of the mounting roller 7, and a first annular mounting block 26 is fixedly installed on the outside of the mounting roller 7. The first annular mounting block 26 has a first annular mounting groove. The part of the cold air delivery pipe 8 that extends through the first annular mounting groove is connected to the first annular mounting groove. A second annular mounting block 27 is nested on the first annular mounting block 26 in a relatively rotatable manner. The second annular mounting block 27 has a second annular mounting groove that matches the first annular mounting groove. A cold air inlet pipe 28 is connected to the second annular mounting groove. Since the mounting roller 7 is driven by a motor to rotate, and the second annular mounting block 27 and the first annular mounting block 26 do not interfere with each other spatially, and the first annular mounting groove and the second annular mounting groove are always in a sealed and connected state, cold air can be continuously and stably delivered to each set of processing chambers 9 through the cold air inlet pipe 28 to efficiently cool and lower the granular magnesium chloride therein.

[0042] Example 4

[0043] Please see Figure 5 The screening mechanism will be further described in detail with reference to Example 1:

[0044] The screening mechanism includes a conveyor belt 29 and a collection box 30. The upstream end of the conveyor belt 29 is located directly below the granulation and cooling mechanism, and screening holes are evenly distributed on the surface of the conveyor belt 29. The collection box 30 is located between the upper and lower surfaces of the conveyor belt 29. The cooled and solidified magnesium chloride particles that pass through the processing chamber 9 fall into the conveyor belt 29 and are transported and collected by the conveyor belt 29. Due to the screening holes on the surface of the conveyor belt 29, magnesium chloride particles that do not meet the particle size requirements can fall into the collection box 30 for collection.

[0045] Example 5

[0046] Please see Figure 1-5 The operating process and working principle of the present invention will be explained in conjunction with Examples 1-4:

[0047] A granulation device for preventing magnesium chloride from agglomerating, in the process of producing magnesium chloride granules, controls the movement of the extrusion piston 2 at the top of the extrusion cylinder 1, and feeds the magnesium chloride solution into the extrusion cylinder 1 from the feed hopper 14 and the feed pipe 5 along the bottom of the extrusion piston 2. The extrusion cylinder 1 is heated by the spiral heating pipe 3 and the magnesium chloride solution therein is evaporated and concentrated into concentrated magnesium chloride, while the evaporated water vapor is discharged from the exhaust pipe 6.

[0048] By controlling the first drive motor 17 to drive the adjusting screw 15 and the extrusion piston 2 to move downward, the concentrated magnesium chloride in the extrusion cylinder 1 is extruded from the extrusion tube 4; at the same time, the mounting roller 7 rotates stably under the drive of the motor. When one of the strip scraper plates 10 contacts the extrusion tube 4, the extruded strip-shaped concentrated magnesium chloride is cut into granular magnesium chloride and falls into the corresponding processing chamber 9. Since each set of turning plates 21 can turn the granular magnesium chloride into the processing chamber 9 during the rotation, the cold air output by the cold air conveying pipe 8 can fully cool the granular magnesium chloride to generate solid magnesium chloride granules. In addition, the rotating turning plates 21 can effectively prevent the magnesium chloride granules from clumping together; and the cooled air is also conveyed outward by the rotating turning plates 21.

[0049] When the magnesium chloride particles that have been cooled and cooled are rotated to the bottom of the processing chamber 9, they fall from the processing chamber 9 onto the conveyor belt 29 and are transported and collected by the conveyor belt 29. Due to the setting of the screening holes on the surface of the conveyor belt 29, magnesium chloride particles that do not meet the particle size requirements can fall into the collection box 30 for collection.

[0050] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0051] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and 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 granulating device for preventing magnesium chloride from agglomerating, characterized in that: It comprises an extrusion strip device, a granulation cooling mechanism, and a screening mechanism. The discharge end of the extrusion strip device is matched with the granulation cooling mechanism, and the bottom of the granulation cooling mechanism is matched with the screening mechanism. The extrusion strip device comprises an extrusion barrel (1), an extrusion piston (2), and a spiral heating tube (3); the extrusion barrel (1) is arranged vertically, and a plurality of groups of extrusion tubes (4) distributed in a straight line are provided at the bottom end of the extrusion barrel (1); the extrusion piston (2) is nested and installed in the extrusion barrel (1) in a relatively sliding manner, and the extrusion piston (2) is in close contact with the inner wall of the extrusion barrel (1); the upper surface of the extrusion piston (2) is dynamically connected to a first driving mechanism, and the first driving mechanism drives the extrusion piston (2) to move up and down; the middle section of the side wall of the extrusion barrel (1) is connected to a feed pipe (5) and an exhaust pipe (6); and the lower half of the inner wall of the extrusion barrel (1) is wound with a spiral heating tube (3); The granulation cooling mechanism is arranged directly below the extrusion tube (4), and comprises a mounting roller body (7), a material turning mechanism, and a cold air conveying pipe (8); the outer wall of the mounting roller body (7) is provided with a plurality of processing chambers (9) distributed in an annular array; the cold air conveying pipe (8) is arranged at the innermost side of the processing chamber (9); the material turning mechanism is matched and installed in each group of processing chambers (9), and each group of material turning mechanisms is dynamically connected to a second driving mechanism; the outer wall of the mounting roller body (7) is fixed with a strip-shaped scraper plate (10) in an annular array and in close contact with the extrusion tube (4); The screening mechanism is arranged directly below the granulation cooling mechanism.

2. A granulating device for preventing magnesium chloride from agglomerating according to claim 1, characterized in that: A mounting bracket is also provided, the extrusion cylinder (1) is fixedly mounted on the mounting bracket, the mounting roller body (7) is nested and mounted on the mounting bracket in a relatively rotatable manner, and the power shaft (12) of the mounting roller body (7) is dynactively connected to an electric motor, and the electric motor drives the mounting roller body (7) to rotate stably.

3. A granulating device for preventing magnesium chloride from agglomerating according to claim 2, characterized in that: A mounting plate (11) is horizontally fixed to the top of the extrusion cylinder (1), an exhaust pump (13) is mounted on the exhaust pipe (6), and the exhaust pump (13) is fixedly mounted on the mounting plate (11), a feed hopper (14) is also fixedly mounted on the mounting plate (11), and the bottom end of the feed hopper (14) is connected to the feed pipe (5).

4. A granulating device for preventing magnesium chloride from agglomerating according to claim 3, characterized in that: The first driving mechanism is also mounted on the mounting plate (11), and comprises an adjusting screw (15), a driving disk (16), and a first driving motor (17). The adjusting screw (15) is arranged through the mounting plate (11) and is nested and mounted with the extrusion piston (2) in a relatively rotatable manner. The driving disk (16) is nested and mounted on the mounting plate (11) in a relatively rotatable manner and is screwed to the adjusting screw (15). A first direction-changing gear (18) is fixedly mounted on the driving disk (16). The first driving motor (17) is fixedly mounted on the mounting plate (11) and a second direction-changing gear (19) is fixedly mounted on its rotating shaft. The first direction-changing gear (18) is meshedly connected with the second direction-changing gear (19).

5. A granulating device for preventing magnesium chloride from agglomerating according to claim 4, characterized in that: The inner side of the bottom end of the extrusion cylinder (1) gradually narrows from top to bottom, and the lower surface of the extrusion piston (2) is nested and matched with the bottom end of the extrusion cylinder (1).

6. A granulating device for preventing magnesium chloride from agglomerating according to claim 5, characterized in that: The material turning mechanism comprises a mounting shaft (20) and a material turning plate (21); the mounting shaft (20) is nested and installed in a relatively rotatable manner in a processing chamber (9) body and is arranged along the extension direction of the mounting roller body (7); the material turning plates (21) are fixedly installed on the mounting shaft (20) and are distributed in a ring array; and the material turning plates (21) fill the processing chamber (9) and are in close contact with the side wall of the processing chamber (9).

7. A granulating device for preventing magnesium chloride from agglomerating according to claim 6, characterized in that: The same end of each group of the installation shafts (20) passes through the outer end of the installation roller body (7), and the passing part is dynamically connected to the second driving mechanism, the second driving mechanism comprises a transmission sprocket (22) and a second driving motor (23), a transmission sprocket (22) is fixedly mounted on the passing part of each group of the installation shafts (20), and each group of the transmission sprockets (22) is dynamically connected via a chain, a third direction-changing gear (24) is fixedly mounted on one group of the installation shafts (20), the second driving motor (23) is fixedly mounted on the outer end of the installation roller body (7), and a fourth direction-changing gear (25) is fixedly mounted on its rotating shaft, and the third direction-changing gear (24) is meshingly connected with the fourth direction-changing gear (25).

8. A granulating device for preventing magnesium chloride from agglomerating according to claim 7, characterized in that: Each group of the cold air delivery pipes (8) is provided with a plurality of groups of cold air nozzles facing the outside of the processing chamber (9); the same end of each group of the cold air delivery pipes (8) is passed through the outer end of the mounting roller body (7); and the outer end of the mounting roller body (7) is fixedly provided with a first annular mounting block (26); and the first annular mounting block (26) is provided with a first annular mounting groove; the outlet portion of the cold air delivery pipe (8) is connected to the first annular mounting groove; a second annular mounting block (27) is nested and installed on the first annular mounting block (26) in a relatively rotatable manner; and the second annular mounting block (27) is provided with a second annular mounting groove which is relatively matched with the first annular mounting groove; and the second annular mounting groove is connected with a cold air inlet pipe (28).

9. A granulating device for preventing magnesium chloride from agglomerating according to claim 8, characterized in that: The screening mechanism comprises a conveyor belt (29) and a collection box (30); the upstream end of the conveyor belt (29) is arranged directly below the granulation cooling mechanism, and screening holes are evenly opened on the belt surface of the conveyor belt (29); the collection box (30) is located between the upper belt surface and the lower belt surface of the conveyor belt (29).

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