A drying device for calcium carbonate production and processing

Abstract

This utility model discloses a drying device for calcium carbonate production and processing, including a shell, a large drying tray, a small drying tray, and a rotating shaft. The large drying tray has a central opening. The large and small drying trays are arranged alternately, one above the other. The rotating shaft passes through the large and small drying trays sequentially. Rake tooth assemblies are respectively installed on the large and small drying trays. Each rake tooth assembly includes a rake arm, multiple rake blades, multiple tail rods, multiple sleeves, multiple head rods, and multiple limiting rings. The rake blades are spaced below each other. The head rods pass through the sleeves and are rotatably connected to them. The head rods are fixedly connected to one end of the rake blades, and the tail rods are fixedly connected to the other end of the rake blades. The bottom surface of the limiting rings has a limiting groove with an S-shaped, end-to-end connection structure. The upper part of the tail rods extends into the limiting groove. This utility model extends the material movement path, reducing the number of large and small drying trays while maintaining the same drying effect. It also reduces the equipment's volume and facilitates transportation and handling.

Description

Technical Field

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

[0002] Calcium carbonate produced by the wet process has a high moisture content and requires drying. The equipment used is a disc dryer, a highly efficient conductive continuous drying device that provides good drying results for calcium carbonate slurry. Wet material is continuously fed onto the first drying disc at the top of the dryer via a feeder. The rake arms with rake blades rotate, continuously agitating the material. The material flows along an exponential spiral across the surface of the drying discs. Material on the smaller drying discs is moved to the outer edge and falls onto the outer edge of the larger drying disc below. On the larger drying disc, the material moves inward and falls through the central discharge port into the next layer of smaller drying discs. The large and small drying discs are arranged alternately, allowing the material to flow continuously throughout the dryer. A heating medium, such as saturated steam, hot water, thermal oil, or high-temperature molten salt, is circulated through the hollow drying discs. The heating medium enters from one end of the drying disc and exits from the other. The drying principle of the drying tray is to achieve heating and drying by multiple drying trays of different sizes distributed from top to bottom, as shown in patent CN202021865298.X. The more drying trays of different sizes are set, the better the drying effect. This also leads to a larger overall equipment space occupation, making transportation and installation very inconvenient. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a drying device for calcium carbonate production and processing.

[0004] The objective of this utility model is achieved through the following technical solution: A drying device for calcium carbonate production and processing includes a shell, support legs, a feed inlet, a discharge outlet, an exhaust outlet, a large drying disc, a small drying disc, and a rotating shaft. The large drying disc has a central opening. The large and small drying discs are arranged alternately, and the rotating shaft passes sequentially through the large and small drying discs. Rake tooth assemblies are respectively provided on the large and small drying discs. Each rake tooth assembly includes a rake arm, multiple rake blades, multiple tail rods, multiple sleeves, and multiple... The device comprises a head rod, multiple limiting rings, and rake blades spaced below each other. A sleeve is vertically arranged and fixedly connected to the rake arm. The head rod passes through the sleeve and is rotatably connected to it. The head rod is fixedly connected to one end of the rake blade, and the tail rod is fixedly connected to the other end of the rake blade. The bottom surface of the limiting rings is provided with limiting grooves. The limiting grooves are S-shaped and connected end to end. The upper part of the tail rod extends into the limiting grooves. A set of limiting grooves corresponds to a set of rake blades, tail rods, sleeves, and head rods.

[0005] Furthermore, the housing is provided with multiple lifting rods, a third support plate, a second support rod, and a lifting mechanism. The top of the housing is provided with multiple circular holes, which are evenly distributed around the rotating shaft. The lifting rod is a circular straight rod structure, which passes through the circular holes and slides vertically with the holes. The ends of the third support plate are respectively fixedly connected to the tops of the lifting rods, and the multiple lifting rods are connected into a single structure. The bottom of the lifting rod is fixedly connected to one end of the second support rod, and the other end of the second support rod is fixedly connected to the limiting ring.

[0006] Furthermore, a first pull plate is provided in the middle of the rake blade, and a second pull plate matching the first pull plate is provided on the rake arm, with the tension spring installed at the ends of the first pull plate and the second pull plate.

[0007] Furthermore, a limiting rod is provided on the rake arm, and the limiting rod is located between the rake blade and the second pull plate.

[0008] Furthermore, the lifting mechanism is a hydraulic drive mechanism or a screw drive mechanism.

[0009] This utility model has the following advantages: by setting a limiting ring, the rake blades swing left and right on the large and small drying trays, causing the material on the trays to move left and right and be stir-fried. This extends the movement path of the material from the top large drying tray to the bottom large drying tray, thereby reducing the number of large and small drying trays while maintaining the same drying effect. It also reduces the volume occupied by the equipment and facilitates transportation and handling. The overall structure is simple, not easily jammed by materials, and highly practical. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model;

[0011] Figure 2 This is a three-dimensional structural diagram of the internal parts of this utility model;

[0012] Figure 3 This is the utility model Figure 2 A schematic diagram of the three-dimensional structure of the rake plate connection;

[0013] Figure 4 This is a three-dimensional structural diagram of the internal part of this utility model from another perspective.

[0014] In the diagram, 1. Shell; 2. Support leg; 3. Feed inlet; 4. Exhaust outlet; 5. Discharge outlet; 6. Rotating shaft; 7. Large drying tray; 8. Opening; 9. Material retaining edge; 10. Small drying tray; 11. Rake tooth assembly; 12. Steam inlet pipe; 13. Steam outlet pipe; 14. First support rod; 15. Rake arm; 16. Rake blade; 17. Tail rod; 18. Sleeve; 19. Head rod; 20. First pull plate; 21. Second pull plate; 22. Tension spring; 23. Limiting ring; 24. Second support rod; 25. Lifting rod; 26. Third support plate; 27. Screw; 28. Motor; 29. ​​Limiting rod; 30. Limiting groove. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can typically be arranged and designed in various different configurations.

[0016] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0017] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0018] like Figure 1 , Figure 2As shown, a drying device for calcium carbonate production and processing includes a shell 1, support legs 2, a feed inlet 3, a discharge outlet 5, an exhaust outlet 4, a large drying tray 7, a small drying tray 10, and a rotating shaft 6. The shell 1 has a cylindrical structure, with the support legs 2 installed at its bottom. The feed inlet 3 for wet materials is installed at the bottom of the shell 1, and the discharge outlet 5 is installed at the bottom of the shell 1. Its inner bottom surface has a sloping structure to facilitate the discharge of dry powder. Each large drying tray 7 and small drying tray 8 constitutes a drying mechanism, with multiple drying mechanisms arranged vertically. The large drying tray 7 and small drying tray 10 are arranged alternately vertically. The center of the large drying tray 7 has a circular opening 8. A baffle 9 is installed on the edge of the large drying tray 7. The rotating shaft 6 passes through the circular opening 8 of the large drying tray 7 and the surface of the small drying tray 10 in sequence. The rotating shaft 6 is rotatably connected to the small drying tray 10. The large drying tray 7 and the small drying tray 10 are hollow structures. A steam inlet pipe 12 is installed on one side and a steam outlet pipe 13 is installed on the other side. A first support rod 14 is installed on the edge of the large drying tray 7 and the small drying tray 10. The large drying tray 7 and the small drying tray 10 are connected to the inner surface of the fixed shell 1 through the first support rod 14. A motor and a reducer can be installed at the bottom of the rotating shaft 6 for driving. The above structure is no different from the disc dryer in the prior art.

[0019] like Figure 3 As shown, four sets of rake tooth assemblies 11 are installed on the large drying disc 7 and the small drying disc 10 respectively. The four sets of rake tooth assemblies 11 are installed on the disc surfaces of the large drying disc 7 and the small drying disc 10 respectively. Each set of rake tooth assemblies 11 includes a rake arm 15, three rake blades 16, three tail rods 17, three sleeves 18, three head rods 19, and three limiting rings 23. The rake blades 16 are flat plate structures. The rake blades 16 are spaced apart below the rake blades 16 and are vertically arranged to form a plate-type scraping structure. The sleeves 18 are vertically arranged, and the rake arms 15 are fixedly connected to the side of the sleeves 18. The head rods 19 pass through the sleeves 18 and are rotatably connected to the sleeves 18. The diameter of the head rods 19 is 3mm smaller than the inner diameter of the sleeves 18 to form a gap that allows the powder to slide off. The bottom of the head rods 19 is fixedly connected to the upper surface of one end of the rake blades 16. The tail rods 17 are cylindrical straight rod structures. The tail rod 17 is fixedly connected to the other end of the rake blade 16. A first pull plate 20 is installed in the middle of the rake blade 16. A second pull plate 21 matching the first pull plate 20 is installed on the rake arm 15. The first pull plate 20 and the second pull plate 21 are rectangular plate structures. One end of the first pull plate 20 and the second pull plate 21 are respectively provided with an opening. The other end of the first pull plate 20 and the second pull plate 21 are respectively fixedly connected to the rake blade 16 and the rake arm 15. A tension spring 22 is installed at the opening at the end of the first pull plate 20 and the second pull plate 21. Under the action of the contraction force, the tension spring 22 pulls the rake blade 16 toward the second pull plate 21 with the head rod 19 as the center. A limiting rod 29 is installed on the rake arm 15. The limiting rod 29 is a straight rod structure. The top of the limiting rod 29 is vertically welded to the rake arm 15. The limiting rod 29 is located between the rake blade 16 and the second pull plate 21 to limit the range of motion of the rake blade 16.

[0020] The housing 1 is equipped with four lifting rods 25, two third support plates 26, four second support rods 24, and a lifting mechanism. Multiple circular holes are evenly spaced around the rotating shaft 6 at the top of the housing 1. The lifting rods 25 are circular straight rods that pass through the circular holes and slide vertically with them. The third support plates 26 form a cross-shaped structure, welded together in the middle. The ends of the third support plates 26 are welded and fixedly connected to the tops of the lifting rods 25, connecting multiple lifting rods 25 into a single structure. One end of each second support rod 24 is welded to the bottom of the lifting rod 25. The other end of each second support rod 24 is horizontally fixedly connected to a limiting ring 23. There are three limiting rings 23, each corresponding to a set of rake blades 16, tail rods 17, sleeves 18, and head rods 19. The limiting rings 23 have an S-shaped, end-to-end connection structure. Figure 2 As shown, this S-shaped structure, with its ends connected, is not a traditional S-shaped structure. As can be seen from the diagram, the limiting ring 23 is a square structure with smooth corners. The midpoint of each side of the square is the closest point to the rotation axis 6, and the corner of each side of the square is the farthest point from the rotation axis 6. Figure 4 As shown, a limiting groove 30 is opened on the bottom surface of the limiting ring 23. The limiting groove 30 is located directly above the tail rod 17. After the limiting ring 23 moves downward, the tail rod 17 can be inserted into the limiting groove 30. The tail rod 17 moves between the farthest point and the nearest point of the limiting ring 23, forming a left-right swaying movement of the rake blade 16. The rake tooth assembly 11 installed on the large drying disc 7 and the small drying disc 10 are in opposite positions, so that when the tail rod 17 is not inserted into the limiting groove 30, the rake blade 16 is close to the limiting rod 29 under the action of the tension spring 22. At this time, the scraping positions of the rake blade 16 on the large drying disc 7 and the small drying disc 10 are opposite.

[0021] The lifting mechanism can be either a hydraulic drive mechanism or a screw drive mechanism. Here, a screw drive mechanism is selected, which includes a motor 28 and a screw 27. The screw 27 passes vertically through the middle of the connection point of the third support plate 26 and is threadedly connected to it. The output end of the motor 28 drives the screw 27 to rotate. Some motors have low torque, so they can be connected and driven by adding a speed reducer.

[0022] The working principle of this utility model is as follows: Personnel add material into the shell 1 through the feed inlet 3. The slurry falls onto the large drying tray 7. The motor 28 is started, driving the screw 27 to rotate. The screw 27 causes the lifting rod 25, the second support rod 24, and the limiting ring 23 to move downwards, allowing the tail rod 17 to insert into the limiting groove 30. The motor then drives the rotating shaft 6 to rotate, causing the rake arm 15, rake blade 16, sleeve 18, head rod 19, tail rod 17, first pull plate 20, second pull plate 21, and tension spring 22 to rotate. The special structure of the limiting groove 30 allows the tail rod 17 to move along the path of the limiting groove 30, enabling the rake blade 16 to swing left and right around the head rod 19 as the center. The tilt angle of the rake blade 16 creates repeated scraping and pushing of the material on the large drying tray 7 and the small drying tray 10, extending the material's movement path. After a certain interval, the operator reverses the motor 28, causing the lifting rod 25 and the limiting ring 23 to move upwards. At this time, the tail rod 17 disengages from the limiting groove 30. Under the action of the tension spring 22, the rake blade 16 will press against the limiting rod 29. At this time, the positions of the large drying tray 7 and the small drying tray 10 are reversed, similar to a normal disc dryer. The rake blade 16 on the large drying tray 7 scrapes the material towards the central opening 8, while the rake blade 16 on the small drying tray 10 scrapes the material towards the edge, realizing the transfer and conveying between the trays.

[0023] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A drying device for calcium carbonate production and processing, comprising a shell (1), support legs (2), a feed inlet (3), a discharge outlet (5), an exhaust outlet (4), a large drying disc (7), a small drying disc (10), and a rotating shaft (6), wherein the large drying disc (7) has an opening (8) at its center, the large drying disc (7) and the small drying disc (10) are arranged alternately, and the rotating shaft (6) passes through the large drying disc (7) and the small drying disc (10) in sequence, characterized in that: The large drying tray (7) and the small drying tray (10) are respectively provided with rake tooth assemblies (11). The rake tooth assembly (11) includes a rake arm (15), multiple rake blades (16), multiple tail rods (17), multiple sleeves (18), multiple head rods (19), and multiple limiting rings (23). The rake blades (16) are spaced below each other. The sleeves (18) are vertically arranged and fixedly connected to the rake arm (15). The head rods (19) pass through the sleeves (18). The sleeve (18) is rotatably connected to the inner part of the sleeve (18). The first rod (19) is fixedly connected to one end of the rake blade (16), and the tail rod (17) is fixedly connected to the other end of the rake blade (16). The bottom surface of the limiting ring (23) is provided with a limiting groove (30). The limiting groove (30) is an S-shaped end-to-end structure. The upper part of the tail rod (17) extends into the limiting groove (30). A set of the limiting grooves (30) corresponds to a set of rake blades (16), tail rods (17), sleeves (18), and first rods (19).

2. The drying apparatus for calcium carbonate production and processing according to claim 1, characterized in that: The housing (1) is provided with multiple lifting rods (25), a third support plate (26), a second support rod (24), and a lifting mechanism. The top of the housing (1) is provided with multiple round holes, which are evenly distributed around the rotating shaft (6). The lifting rod (25) is a circular straight rod structure. The lifting rod (25) passes through the round hole and is slidably connected to the round hole. The ends of the third support plate (26) are fixedly connected to the top of the lifting rod (25) and the multiple lifting rods (25) are connected into a whole structure. The bottom of the lifting rod (25) is fixedly connected to one end of the second support rod (24), and the other end of the second support rod (24) is fixedly connected to the limiting ring (23).

3. A drying apparatus for calcium carbonate production and processing according to claim 2, characterized in that: A first pull plate (20) is provided in the middle of the rake blade (16), and a second pull plate (21) matching the first pull plate (20) is provided on the rake arm (15). Tension springs (22) are installed at the ends of the first pull plate (20) and the second pull plate (21).

4. A drying apparatus for calcium carbonate production and processing according to claim 3, characterized in that: A limiting rod (29) is provided on the rake arm (15), and the limiting rod (29) is located between the rake blade (16) and the second pull plate (21).

5. A drying apparatus for calcium carbonate production and processing according to claim 2, characterized in that: The lifting mechanism is a hydraulic drive mechanism or a screw drive mechanism.

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