Pelletizing and drying device

Abstract

The utility model relates to a granulating and drying device which comprises a shell with an opening in the upper end and a top cover, an installation cavity is formed in the bottom of the shell, an air heater is arranged in the installation cavity, an air outlet of the air heater is connected with an air guide disc, an air guide outer barrel and an air guide inner barrel which are communicated with the interior of the air guide disc are arranged on the air guide disc, and an inner air hole is formed in the air guide outer barrel. An outer air hole is formed in the air guide inner cylinder, a drying cavity is formed between the air guide outer cylinder and the air guide inner cylinder, hot air can be evenly sprayed into the drying cavity, the drying effect is improved, a feeding pipe is rotationally arranged on the top cover, an exhaust pipe is arranged in the feeding pipe in a sleeved mode, a feeding channel is arranged between the feeding pipe and the exhaust pipe, and a spiral piece fixed to the inner wall of the feeding pipe is arranged between the feeding pipe and the exhaust pipe. And the bottom end of the exhaust pipe extends to the position below the feeding pipe, and the inner wall of the exhaust pipe is provided with an inner ring groove protruding in the axis direction of the exhaust pipe, so that the utilization rate of heat energy is increased, particles entering the drying cavity are preheated, water drops in wet air are prevented from flowing back and being absorbed by the particles, and the drying effect is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of medicine processing, in particular to a granulation and drying device. Background Art

[0002] Granulation is a process for agglomerating fine particles into coarse powder aggregates to improve powder flowability. Granulation is the process of processing materials in a state such as powder, melt, or aqueous solution into granules of a certain shape and size. During the drug granulation process, a drug granulation drying device is used for drying. However, existing granulation drying devices are prone to uneven heating. Patent application number "CN214172837U" discloses a Chinese medicine granulation drying device. This device uses a screw-shaped drying plate within a housing. After entering the drying plate, the Chinese medicine granules are affected by gravity and spiral downward along the drying plate. During the process, they are dried by hot air from the bottom to the top, resulting in high drying efficiency. However, using this method, a long drying path is required to ensure that the granules are completely dried. The hot air still has a large amount of heat when it is discharged from the exhaust port, and direct discharge results in energy waste. Furthermore, as the granules move downward along the spiral plate, the moisture in the granules that move to the bottom of the spiral plate is carried away by the hot air. At this time, the hot air continues to flow upward and contacts the granules above. The moisture in the hot air may be reabsorbed by the already dried granules above, resulting in poor drying effect. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a granulation drying device to solve the problem of waste of hot air in the prior art and improve the drying effect of particles.

[0004] In order to solve the above technical problems, the utility model provides a granulation drying device, comprising a shell with an upper end opening and a top cover, a mounting cavity is provided at the bottom of the shell, a hot air blower is provided in the mounting cavity, an air outlet of the hot air blower is connected to an air guide plate, an air guide outer cylinder and an air guide inner cylinder which are connected to the interior of the air guide plate are provided on the air guide plate, the air guide outer cylinder is arranged on the outer periphery of the air guide plate and an inner air hole is provided on the inner side wall, the air guide inner cylinder is arranged at the center of the air guide plate and an outer air hole is provided on the outer side wall, a drying cavity is provided between the air guide outer cylinder and the air guide inner cylinder, a rotating ring is provided at the bottom of the top cover for rotation, and the rotating ring Driven by the rotating mechanism, it rotates, and a stirring mechanism is provided on the rotating ring that extends into the drying chamber. A feed pipe is rotatably provided on the top cover, and an exhaust pipe is sleeved inside the feed pipe. A feed channel is provided between the feed pipe and the exhaust pipe and a spiral sheet is fixed on the inner wall of the feed pipe. The top of the exhaust pipe passes through the feed pipe and is connected to the air pump. The bottom end of the exhaust pipe extends to the bottom of the feed pipe and an inner ring groove protruding toward the axial direction of the exhaust pipe is provided on the inner wall. A liquid guide tube is provided on the side wall of the inner ring groove, and the other end of the liquid guide tube is connected to the liquid storage tank fixed on the bottom of the top cover.

[0005] Furthermore, the rotating mechanism includes a first motor and a first gear fixed to an output end of the first motor, and a first gear disc meshing with the first gear is provided on the rotating ring.

[0006] Furthermore, the stirring mechanism includes at least one stirring shaft provided on the rotating ring, the bottom end of the stirring shaft is provided with a stirring rod matching the radial width of the drying chamber, and the stirring rod is provided with a plurality of stirring teeth.

[0007] Furthermore, the feed pipe is rotatably mounted on the top cover via a first bracket, a second motor is mounted on the first bracket, a second gear is fixed to the output end of the second motor, and a second gear disc meshing with the second gear is mounted on the outer peripheral wall of the feed pipe.

[0008] Furthermore, the upper end of the exhaust pipe is fixed to a second bracket, and the second bracket is fixed to the first bracket.

[0009] Furthermore, a support ring is provided on the outside of the shell, and both sides of the support ring are rotatably arranged on the frame through support shafts, one of which is fixed to the output end of the third motor, and a lifting cylinder is also provided on the top of the frame, and the output end of the lifting cylinder is fixed to the top cover.

[0010] Furthermore, a plurality of hot air holes are provided on a side of the air guide plate close to the drying chamber.

[0011] Furthermore, a feed hopper is provided on the top of the feed pipe.

[0012] The beneficial effects of the present invention are as follows: when the rotating ring is driven by the rotating mechanism to rotate, it drives the stirring mechanism on the rotating ring to rotate around the circumference of the drying chamber, stirring the particles in the drying chamber so that they are heated evenly. The hot air blower arranged at the bottom of the shell provides dry hot air for the drying chamber. The air outlet of the hot air blower is connected to the air guide disk. The hot air enters the air guide outer tube and the air guide inner tube through the air guide disk, and is sprayed into the drying chamber through the inner air holes of the air guide outer tube and the outer air holes of the air guide inner tube to dry the particles in the drying chamber. At this time, the hot air sprayed into the drying chamber can be in uniform contact with the particles in the circumferential direction through the setting of the inner air holes and the outer air holes. A feed pipe is rotatably provided on the top cover, and an exhaust pipe is sleeved inside the feed pipe for discharging the wet air in the shell. The feed channel between the feed pipe and the exhaust pipe is used to feed into the drying chamber. The spiral blades on the inner wall of the feed pipe guide the particles to reduce the possibility of particles blocking the feed channel. When the feed pipe rotates, the particles move along the spiral blades and fall into the drying chamber. At the same time, as the humid air is discharged from the exhaust pipe, its remaining heat exchanges with the particles in the feed channel through the wall of the exhaust pipe, preheating the particles in the feed channel. This not only prevents the particles from suddenly exploding upon contact with the hot air in the drying chamber, which could affect the quality of the finished product, but also allows the waste heat of the hot air to be reused, improving the utilization rate of thermal energy. When the hot air exchanges heat through the wall of the exhaust pipe, the moisture in the humid air will precipitate into water droplets when it cools. By providing an inner annular groove at the bottom of the exhaust pipe, the precipitated water droplets can flow along the wall of the exhaust pipe into the inner annular groove and enter the liquid storage tank through the liquid guide pipe, preventing the water droplets from flowing back into the drying chamber and affecting the drying effect of the particles. In summary, the use of this utility model improves the utilization rate of thermal energy and the drying effect of the particles.

[0013] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural diagram of the utility model;

[0015] Figure 2 for Figure 1 A detailed enlarged view of A;

[0016] Figure 3 for Figure 1 A magnified detail of B;

[0017] Figure 4 for Figure 1 A magnified detail of C.

[0018] In the accompanying drawings: 1-shell, 11-installation cavity, 12-support ring, 13-support shaft, 14-third motor, 2-top cover, 21-lifting cylinder, 3-hot air blower, 4-air guide plate, 41-air guide outer cylinder, 411-inner air hole, 42-air guide inner cylinder, 421-outer air hole, 43-drying chamber, 44-hot air hole, 5-rotating ring, 51-first motor, 52-first gear, 53-first gear disc, 6-stirring mechanism, 61-stirring shaft, 62-stirring rod, 63-stirring teeth, 7-feed pipe, 71-spiral plate, 72-second motor, 73-second gear, 74-second gear disc, 75-feed hopper, 8-exhaust pipe, 81-inner ring groove, 82-liquid guide pipe, 83-liquid storage tank, 9-frame, 91-first bracket, 92-second bracket. DETAILED DESCRIPTION

[0019] With reference to the accompanying drawings, specific embodiments of the present invention will be described in detail.

[0020] Reference Figures 1 to 4 The present invention provides a granulation drying device, comprising a housing 1 with an open top and a top cover 2. Furthermore, a support ring 12 is provided on the outside of the housing 1. Both sides of the support ring 12 are rotatably mounted on a frame 9 via support shafts 13. One of the support shafts 13 is fixed to the output end of a third motor 14. By driving the support shaft 13 to rotate via the third motor 14, the housing 1 can be flipped over to pour out the dried granules for convenient discharge.

[0021] Furthermore, a lifting cylinder 21 is provided on the top of the frame 9, and the output end of the lifting cylinder 21 is fixed to the top cover 2. The lifting cylinder 21 drives the top cover 2 to rise and open the opening of the shell 1, or moves it downward and drives the top cover 2 to cover the opening of the shell 1.

[0022] The bottom of the housing 1 is provided with a mounting cavity 11, within which a hot air blower 3 is housed. The hot air blower 3 provides dry, hot air to the drying chamber 43. The air outlet of the hot air blower 3 is connected to an air guide plate 4, which is fixed to the inner wall of the housing 1 and has an inner cavity for guiding the hot air. The air guide plate 4 is provided with an outer air guide cylinder 41 and an inner air guide cylinder 42, which communicate with the interior of the air guide plate 4. The outer air guide cylinder 41 is located on the outer periphery of the air guide plate 4 and has inner air holes 411 on its inner sidewall. The inner air guide cylinder 42 is located at the center of the air guide plate 4 and has outer air holes 421 on its outer sidewall. A drying chamber 43 is defined between the outer air guide cylinder 41 and the inner air guide cylinder 42. Furthermore, a plurality of hot air holes 44 are provided on the side of the air guide plate 4 near the drying chamber 43, allowing hot air to be sprayed into the drying chamber 43 from the bottom, further improving the drying effect. Hot air passes through the air guide plate 4 into the air guide outer cylinder 41 and the air guide inner cylinder 42. It is then sprayed into the drying chamber 43 through the inner air holes 411 of the outer air guide cylinder 41 and the outer air holes 421 of the inner air guide cylinder 42, drying the particles therein. The arrangement of the inner air holes 411 and the outer air holes 421 ensures that the hot air sprayed into the drying chamber 43 comes into uniform contact with the particles along the circumference. A feed pipe 7 is rotatably mounted on the top cover 2. An exhaust pipe 8, sheathed within the feed pipe 7, is used to discharge the moist air from the housing 1.

[0023] A rotating ring 5 is provided at the bottom of the top cover 2 for rotation. The rotating ring 5 rotates under the drive of a rotating mechanism. The rotating ring 5 is provided with a stirring mechanism 6 that extends into the drying chamber 43. When the rotating ring 5 rotates under the drive of the rotating mechanism, it drives the stirring mechanism 6 on the rotating ring 5 to rotate around the circumference of the drying chamber 43, stirring the particles in the drying chamber 43 and heating them evenly. Furthermore, the rotating mechanism includes a first motor 51 and a first gear 52 fixed to the output end of the first motor 51. The rotating ring 5 is provided with a first gear disc 53 that meshes with the first gear 52. The first motor 51 is fixed to the top cover 2. The output end of the first motor 51 passes through the top cover 2 and is fixed to the first gear 52. The first motor 51 drives the first gear 52 to rotate, and the first gear disc 53 then drives the rotating ring 5 to rotate, thereby causing the stirring mechanism 6 on the rotating ring 5 to rotate around the circumference of the drying chamber 43. Furthermore, the stirring mechanism 6 includes at least one stirring shaft 61 disposed on the rotating ring 5. A stirring rod 62 matching the radial width of the drying chamber 43 is disposed at the bottom end of the stirring shaft 61. The stirring rod 62 is provided with a plurality of stirring teeth 63. In this manner, the provision of the stirring teeth 63 can enhance the stirring effect on the particulate matter within the drying chamber 43, thereby evenly heating the particulate matter and improving the drying effect.

[0024] A feed tube 7 is rotatably mounted on the top cover 2. A feed hopper 75 is located at the top of the feed tube 7 to facilitate the addition of raw materials into the feed tube 7. Furthermore, the feed tube 7 is rotatably mounted on the top cover 2 via a first bracket 91. A second motor 72 is mounted on the first bracket 91. A second gear 73 is secured to the output end of the second motor 72. A second gear plate 74 is mounted on the outer peripheral wall of the feed tube 7, engaging with the second gear plate 73. The second motor 72 drives the second gear 73 to rotate, and the second gear 73 drives the feed tube 7 to rotate via the second gear plate 74.

[0025] The feed pipe 7 is sheathed with an exhaust pipe 8. The top of the exhaust pipe 8 passes through the feed pipe 7 and is connected to the vacuum pump to discharge the moist air in the shell 1. Furthermore, the upper end of the exhaust pipe 8 is fixed to the second bracket 92, and the second bracket 92 is fixed to the first bracket 91. In this way, the stability of the exhaust pipe 8 is ensured. There is a feed channel between the feed pipe 7 and the exhaust pipe 8 and is provided with a spiral blade 71 fixed on the inner wall of the feed pipe 7. The spiral blade 71 on the inner wall of the feed pipe 7 guides the particles to reduce the possibility of particles clogging the feed channel. The bottom end of the exhaust pipe 8 extends to the bottom of the feed pipe 7 and is provided with an inner annular groove 81 protruding toward the axial direction of the exhaust pipe 8 on the inner wall. A liquid guide tube 82 is provided on the side wall of the inner annular groove 81. The other end of the liquid guide tube 82 is connected to a liquid storage tank 83 fixed to the bottom of the top cover 2. As feed pipe 7 rotates, particles move along spiral blades 71 and fall into drying chamber 43. Simultaneously, as the humid air is discharged from exhaust pipe 8, its residual heat exchanges with the particles in the feed channel through the walls of exhaust pipe 8, preheating the particles in the feed channel. This not only prevents the particles from suddenly bursting upon contact with the hot air in drying chamber 43, which could affect the quality of the finished product, but also allows the hot air's residual heat to be reused, improving thermal energy utilization. As the hot air exchanges heat through the walls of exhaust pipe 8, the moisture in the humid air cools and precipitates into water droplets. By providing an inner annular groove 81 at the bottom of exhaust pipe 8, the precipitated water droplets flow along the walls of exhaust pipe 8 into inner groove 81 and, through liquid conduit 82, into liquid storage tank 83, preventing the water droplets from flowing back into drying chamber 43 and affecting the particle drying effect.

[0026] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0027] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A granulation drying device, characterized in that: The invention comprises a shell (1) with an upper opening and a top cover (2), wherein the bottom of the shell (1) is provided with an installation cavity (11), a hot air blower (3) is provided in the installation cavity (11), an air outlet of the hot air blower (3) is connected to an air guide plate (4), an air guide outer cylinder (41) and an air guide inner cylinder (42) which are in communication with the interior of the air guide plate (4) are provided on the air guide plate (4), the air guide outer cylinder (41) is provided on the outer periphery of the air guide plate (4) and on the inner wall thereof. An inner air hole (411) is provided, the air guide inner cylinder (42) is provided at the center of the air guide plate (4) and an outer air hole (421) is provided on the outer wall thereof, a drying chamber (43) is provided between the air guide outer cylinder (41) and the air guide inner cylinder (42), a rotating ring (5) is provided at the bottom of the top cover (2), the rotating ring (5) rotates under the drive of the rotating mechanism, and a stirring mechanism (6) is provided on the rotating ring (5) that extends into the drying chamber (43), A feed pipe (7) is rotatably provided on the top cover (2), an exhaust pipe (8) is sleeved inside the feed pipe (7), a feed channel is provided between the feed pipe (7) and the exhaust pipe (8), and a spiral sheet (71) is provided fixed on the inner wall of the feed pipe (7), the top of the exhaust pipe (8) passes through the feed pipe (7) and is connected to the air pump, the bottom end of the exhaust pipe (8) extends to the bottom of the feed pipe (7) and an inner ring groove (81) is provided on the inner wall thereof, which protrudes toward the axial center direction of the exhaust pipe (8), a liquid guide pipe (82) is provided on the side wall of the inner ring groove (81), and the other end of the liquid guide pipe (82) is communicated with a liquid storage tank (83) fixed on the bottom of the top cover (2).

2. The granulation drying device according to claim 1, characterized in that The rotating mechanism comprises a first motor (51) and a first gear (52) fixed to the output end of the first motor (51); the rotating ring (5) is provided with a first gear disc (53) meshing with the first gear (52).

3. The granulation drying device according to claim 1, characterized in that: The stirring mechanism (6) comprises at least one stirring shaft (61) provided on the rotating ring (5); a stirring rod (62) matching the radial width of the drying chamber (43) is provided at the bottom end of the stirring shaft (61); and a plurality of stirring teeth (63) are provided on the stirring rod (62).

4. The granulation drying device according to claim 1, characterized in that: The feed pipe (7) is rotatably mounted on the top cover (2) via a first bracket (91); a second motor (72) is mounted on the first bracket (91); a second gear (73) is fixed to the output end of the second motor (72); and a second gear disc (74) meshing with the second gear (73) is mounted on the outer peripheral wall of the feed pipe (7).

5. The granulation and drying device according to claim 4, characterized in that: The upper end of the exhaust pipe (8) is fixed to a second bracket (92), and the second bracket (92) is fixed to the first bracket (91).

6. The granulation drying device according to claim 1, characterized in that: A support ring (12) is provided on the outside of the shell (1), and both sides of the support ring (12) are rotatably mounted on the frame (9) via support shafts (13), wherein one of the support shafts (13) is fixed to the output end of the third motor (14). A lifting cylinder (21) is also provided on the top of the frame (9), and the output end of the lifting cylinder (21) is fixed to the top cover (2).

7. The granulation and drying device according to claim 1, characterized in that: A plurality of hot air holes (44) are provided on one side of the air guide plate (4) close to the drying chamber (43).

8. The granulation and drying device according to claim 1, characterized in that: A feeding hopper (75) is provided on the top of the feeding pipe (7).

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