A vacuum drying device for light calcium carbonate

Abstract

This utility model discloses a vacuum drying device for light calcium carbonate, including a tank. A feed hopper and a discharge hopper are respectively located at the upper and lower ends of the tank's center. A vacuum pump is fixedly installed at the upper end of the feed hopper, and a steam heater is fixedly installed on the annular side wall of the tank. This utility model introduces light calcium carbonate powder into the tank through the feed hopper, uses the vacuum pump to create a vacuum inside the tank, and a rotating rake structure drives several stirring rods to rotate and disperse the light calcium carbonate powder inside the tank. This results in more uniform heating of the material under vacuum, improving the drying effect. The stirring rods, in conjunction with a scraper, scrape off the material adhering to the inner wall of the tank, avoiding material waste. Two freely placed vibrating rollers inside the tank, as the rotating rake structure and stirring rods rotate, strike the stirring rods and scraper upon falling, shaking off any material adhering to the stirring rods and scraper, thus preventing material waste.

Description

Technical Field

[0001] This utility model relates to the field of light calcium carbonate production technology, and in particular to a vacuum drying device for light calcium carbonate. Background Technology

[0002] Light calcium carbonate is an inorganic compound produced through chemical processing. The vacuum drying process of light calcium carbonate mainly achieves rapid evaporation of moisture in the material by reducing the system pressure. The pretreated material is sent into the vacuum drying system, and the system pressure is maintained by a vacuum pump at high temperature to accelerate the evaporation of moisture.

[0003] In practical use, the light calcium carbonate powder to be dried tends to clump together inside the tank, affecting the drying effect. Furthermore, the powder tends to adhere to the inner wall of the tank, causing unnecessary waste. To address these issues, a vacuum drying device for light calcium carbonate is proposed. Utility Model Content

[0004] To address the shortcomings and defects in existing technologies, this utility model proposes a vacuum drying device for light calcium carbonate. This device solves the technical problems in existing vacuum drying devices for light calcium carbonate in the background art, where the light calcium carbonate powder to be dried tends to clump together inside the tank during actual use, affecting the drying effect, and the light calcium carbonate powder tends to adhere to the inner wall of the tank, causing unnecessary waste.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A vacuum drying device for light calcium carbonate includes a tank. A feed hopper and a discharge hopper are respectively located at the upper and lower ends of the tank's center. A vacuum pump is fixedly installed at the upper end of the feed hopper. A steam heater is fixedly installed on the annular side wall of the tank. A steam inlet and a condensate outlet are respectively connected to the upper and lower ends of the steam heater. A wear-resistant layer is provided on the annular inner wall of the tank. A rotating rake structure is horizontally rotatably installed on the left and right inner walls of the tank's center. Several stirring rods are provided on the rotating rake structure. A scraper is provided at the end of each stirring rod away from the rotating rake structure. The scrapers are all set close to the wear-resistant layer. A powder dissipation mechanism for the scrapers is freely placed inside the tank.

[0007] Preferably, the wear-resistant layer is made of titanium nitride.

[0008] Preferably, the scraper has a conical cross-section, and the scraper and the stirring rod are integrally cast. Both the scraper and the stirring rod are made of wear-resistant alloy steel.

[0009] Preferably, the powder dislodging mechanism includes two dislodging rollers freely placed inside the tank. The two dislodging rollers are in contact with two scrapers respectively. Each of the two dislodging rollers has two strip-shaped arc-shaped baffles on its annular sidewall. Each of the dislodging rollers has several circular grooves on its annular sidewall facing the two strip-shaped arc-shaped baffles. Each of the several circular grooves has a shock-absorbing spring fixedly installed in it. Each of the several shock-absorbing springs has a connecting rod fixedly connected to the end away from the circular groove. On the same side, the several connecting rods are fixedly connected to the arc-shaped lower end face of the two strip-shaped arc-shaped baffles respectively.

[0010] Preferably, a sealing ring is fitted onto one end of each of the connecting rods located outside the circular groove, and the sealing rings are fixedly connected to the annular sidewall of the vibrating roller. The strip-shaped arc-shaped baffle and the sealing rings are both high-temperature resistant rubber products.

[0011] Preferably, both of the strip-shaped arc-shaped baffles have circular openings on the arc-shaped sidewalls of the connecting rods facing each other, and bolts are inserted through the circular openings. The connecting rods have threaded holes on the sidewalls away from the vibrating roller, and the bolts are threadedly connected to the threaded holes.

[0012] Compared with the prior art, the advantages of this utility model are as follows:

[0013] 1. By feeding light calcium carbonate powder into the tank through the hopper, the tank is evacuated using a vacuum pump. The rotating rake structure drives several stirring rods to rotate and disperse the light calcium carbonate powder in the tank, making the material heat more evenly in the vacuum environment and improving the drying effect. The stirring rods are used in conjunction with a scraper to scrape off the material adhering to the inner wall of the tank, avoiding waste of raw materials.

[0014] 2. Two vibrating rollers, freely placed inside the tank, strike the stirring rod and scraper as the rake structure and stirring rod rotate, shaking off the material adhering to the stirring rod and scraper, thus avoiding waste of raw materials.

[0015] 3. The shock-absorbing springs in the circular groove, together with the connecting rod and the strip-shaped arc baffle made of high-temperature resistant rubber, provide buffer protection for the vibrating roller, stirring rod and scraper, thus extending the service life of the vibrating roller, stirring rod and scraper. Attached Figure Description

[0016] Figure 1 This is a front perspective view of a vacuum drying device for light calcium carbonate proposed in this utility model.

[0017] Figure 2 This is a side perspective view of a vacuum drying device for light calcium carbonate proposed in this utility model.

[0018] Figure 3 for Figure 1A magnified view of a section at point A in the middle;

[0019] Figure 4 for Figure 2 A magnified view of a section at point B in the middle.

[0020] In the diagram: 1. Tank body, 2. Feed hopper, 3. Discharge hopper, 4. Vacuum pump, 5. Steam heater, 6. Steam inlet, 7. Condensate outlet, 8. Wear-resistant layer, 9. Rotary rake structure, 10. Stirring rod, 11. Scraper, 12. Vibrating roller, 13. Strip-shaped arc baffle, 14. Circular groove, 15. Shock-absorbing spring, 16. Connecting rod, 17. Sealing ring, 18. Circular opening, 19. Bolt, 20. Threaded hole. Detailed Implementation

[0021] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0023] Reference Figure 1-4A vacuum drying device for light calcium carbonate includes a tank body 1. A feed hopper 2 and a discharge hopper 3 are respectively located at the upper and lower ends of the center of the tank body 1. The feed hopper 2 and discharge hopper 3 are used to introduce and discharge light calcium carbonate powder into and out of the tank body 1, respectively. A vacuum pump 4 is fixedly installed at the upper end of the feed hopper 2 for vacuuming the tank body 1. A steam heater 5 is fixedly installed on the annular side wall of the tank body 1 for heating the light calcium carbonate powder inside the tank body 1. A steam inlet 6 and a condensate outlet 7 are respectively connected to the upper and lower ends of the steam heater 5. The steam inlet 6 is used to cover the tank body 1 with steam, and the condensate outlet 7 is used to discharge the condensate inside the tank body 1. The annular inner wall of the tank body 1... The tank 1 has a wear-resistant layer 8 made of titanium nitride. A rotating rake structure 9 is horizontally and rotatably installed on the inner walls of both sides at the center of the tank 1. Several stirring rods 10 are mounted on the rotating rake structure 9, and each stirring rod 10 has a scraper 11 at its end away from the rotating rake structure 9. The scrapers 11 are all closely attached to the wear-resistant layer 8, and their cross-section is conical. The scrapers 11 and stirring rods 10 are integrally cast. Both the scrapers 11 and stirring rods 10 are made of wear-resistant alloy steel. An external drive structure rotates the rotating rake structure 9, causing the rotating rake structure 9 to drive the stirring rods 10 to rotate and disperse the light calcium carbonate powder inside the tank 1. This results in more uniform heating of the material in a vacuum environment, improving the drying effect.

[0024] Inside the tank 1, a powder dispersing mechanism for scrapers 11 is freely placed. This mechanism includes two dispersing rollers 12 freely placed inside the tank 1, each displacing one of the scrapers 11. Two strip-shaped arc-shaped baffles 13 are provided on the annular sidewalls of each of the two dispersing rollers 12. Several stirring rods 10, in conjunction with the scrapers 11, scrape off the material adhering to the wear-resistant layer 8 on the inner wall of the tank 1, preventing material waste. The two dispersing rollers 12, freely placed inside the tank 1, rotate automatically along with the rotating rake structure 9 and stirring rods 10. When the two dispersing rollers 12 fall, they strike the stirring rods 10 and scrapers 11, shaking off the material adhering to them, thus preventing material waste. The dispersing rollers 12 are directly opposite the two strip-shaped arc-shaped baffles 13. Each of the strip-shaped arc-shaped baffles 13 has several circular grooves 14 on its annular sidewall. Each of the circular grooves 14 has a shock-absorbing spring 15 fixedly installed inside it. Each of the shock-absorbing springs 15 has a connecting rod 16 fixedly connected to the end away from the circular groove 14. On the same side, the connecting rods 16 are fixedly connected to the arc-shaped lower end face of the two strip-shaped arc-shaped baffles 13. When the strip-shaped arc-shaped baffles 13 on the vibrating roller 12 collides with the stirring rod 10 and the scraper 11, the strip-shaped arc-shaped baffles 13 are forced to compress the shock-absorbing springs 15 in the circular grooves 14 by the connecting rods 16. This allows the shock-absorbing springs 15, together with the connecting rods 16 and the high-temperature resistant rubber strip-shaped arc-shaped baffles 13, to provide buffer protection for the vibrating roller 12, the stirring rod 10 and the scraper 11, thus extending the service life of the vibrating roller 12, the stirring rod 10 and the scraper 11.

[0025] Each of the connecting rods 16 has a sealing ring 17 fitted at one end outside the circular groove 14. The sealing rings 17 are fixedly connected to the annular sidewall of the vibrating roller 12. The strip-shaped arc-shaped baffle 13 and the sealing rings 17 are both high-temperature resistant rubber products. The high-temperature resistant rubber sealing rings 17 can prevent impurities from entering the circular groove 14. The two strip-shaped arc-shaped baffles 13 are provided with circular openings 18 on the arc-shaped sidewalls of the connecting rods 16. Bolts 19 are inserted through the circular openings 18. The sidewalls of the connecting rods 16 away from the vibrating roller 12 are provided with threaded holes 20. The bolts 19 are threadedly connected to the threaded holes 20 respectively. The bolts 19 and the threaded holes 20 are used to install and fix the strip-shaped arc-shaped baffles 13 on the connecting rods 16.

[0026] In use, this invention involves feeding light calcium carbonate powder into the tank 1 through the feed hopper 2, creating a vacuum in the tank 1 using a vacuum pump 4, and heating the powder inside the tank 1 using a steam heater 5. An external drive structure rotates the rake structure 9, which in turn rotates several stirring rods 10 to disperse the powder within the tank 1. This ensures more uniform heating of the material under vacuum, improving the drying effect. The stirring rods 10, in conjunction with a scraper 11, scrape off the material adhering to the wear-resistant layer 8 on the inner wall of the tank 1, preventing material waste. Two freely placed vibrating rollers 12 move freely within the tank 1, moving with the rake structure 9 and the stirring rods... The rotation of the 10 drives the two vibrating rollers 12 to rotate automatically at the same time. When the two vibrating rollers 12 fall, they strike the stirring rod 10 and the scraper 11, shaking off the material adhering to the stirring rod 10 and the scraper 11, thus avoiding waste of raw materials. When the strip-shaped arc-shaped baffle 13 on the vibrating roller 12 collides with the stirring rod 10 and the scraper 11, the strip-shaped arc-shaped baffle 13 is forced to compress the shock-absorbing spring 15 in the circular groove 14 of the connecting rod 16. This allows the shock-absorbing spring 15, together with the connecting rod 16 and the strip-shaped arc-shaped baffle 13 made of high-temperature resistant rubber, to provide buffer protection for the vibrating roller 12, the stirring rod 10 and the scraper 11, thus extending the service life of the vibrating roller 12, the stirring rod 10 and the scraper 11.

[0027] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A vacuum drying apparatus for light calcium carbonate, comprising a tank (1), wherein a feed hopper (2) and a discharge hopper (3) are respectively provided at the upper and lower ends of the center of the tank (1), a vacuum pump (4) is fixedly installed at the upper end of the feed hopper (2), and a steam heater (5) is fixedly installed on the annular side wall of the tank (1), wherein a steam inlet (6) and a condensate outlet (7) are respectively connected to the upper and lower ends of the steam heater (5), characterized in that, The tank (1) has a wear-resistant layer (8) on its annular inner wall. A rotating rake structure (9) is horizontally rotatably installed on the inner walls of the left and right sides of the center of the tank (1). The rotating rake structure (9) is provided with several stirring rods (10). Each of the stirring rods (10) is provided with a scraper (11) at one end away from the rotating rake structure (9). The scrapers (11) are all set close to the wear-resistant layer (8). A powder shaking mechanism for the scrapers (11) is freely placed inside the tank (1).

2. The vacuum drying apparatus for light calcium carbonate according to claim 1, characterized in that, The wear-resistant layer (8) is made of titanium nitride.

3. The vacuum drying apparatus for light calcium carbonate according to claim 1, characterized in that, The scraper (11) has a conical cross-section. The scraper (11) and the stirring rod (10) are integrally cast. Both the scraper (11) and the stirring rod (10) are made of wear-resistant alloy steel.

4. The vacuum drying apparatus for light calcium carbonate according to claim 1, characterized in that, The powder dissipation mechanism includes two dissipation rollers (12) freely placed inside the tank (1). The two dissipation rollers (12) are in contact with two scrapers (11) respectively. Two strip-shaped arc-shaped baffles (13) are provided on the annular sidewalls of the two dissipation rollers (12). Several circular grooves (14) are provided on the annular sidewalls of the dissipation rollers (12) facing the two strip-shaped arc-shaped baffles (13). Shock-absorbing springs (15) are fixedly installed in the several circular grooves (14). A connecting rod (16) is fixedly connected to the end of the several shock-absorbing springs (15) away from the circular grooves (14). Several connecting rods (16) on the same side are fixedly connected to the arc-shaped lower end face of the two strip-shaped arc-shaped baffles (13).

5. A vacuum drying apparatus for light calcium carbonate according to claim 4, characterized in that, Each of the connecting rods (16) has a sealing ring (17) fitted at one end outside the circular groove (14). Each of the sealing rings (17) is fixedly connected to the annular sidewall of the vibrating roller (12). The strip-shaped arc baffle (13) and the sealing ring (17) are both high-temperature resistant rubber products.

6. A vacuum drying apparatus for light calcium carbonate according to claim 4, characterized in that, Both of the strip-shaped arc-shaped baffles (13) are provided with circular openings (18) on the arc-shaped sidewalls of the connecting rods (16), and bolts (19) are provided through the circular openings (18). The connecting rods (16) are provided with threaded holes (20) on the sidewalls away from the vibrating roller (12), and the bolts (19) are threadedly connected to the threaded holes (20) respectively.

Images