A fluid bed granulator

Abstract

This application discloses a fluidized bed granulator, belonging to the field of pharmaceutical machinery technology. It includes a support frame, with a main body fixedly mounted on top of the support frame. Inside the main body, from top to bottom, are an upper cylinder, a granulation chamber, and a main air chamber, all interconnected. A cyclone separator is fixedly mounted on top of the main body, and a circulating fan is fixedly mounted on the support frame. An exhaust pipe connects the extraction end of the circulating fan to the cyclone separator, and a return air pipe connects the exhaust end of the circulating fan to the main air chamber. A finned heater is fixedly mounted in the middle of the return air pipe. An air distribution plate is fixedly mounted at the connection between the main air chamber and the granulation chamber. A motor is fixedly mounted at the bottom of the air distribution plate, and a rotating shaft is mounted at the output end of the motor. A paddle is fixedly mounted at the top of the rotating shaft. A nozzle is provided at the top of the upper cylinder. This application features a high degree of automation, improving the uniformity of particle size distribution and core fluidization stability, and reducing wall adhesion loss rate.

Description

Technical Field

[0001] This application relates to the field of pharmaceutical machinery technology, and in particular to a fluidized bed granulator. Background Technology

[0002] Fluidized bed granulation technology is a key process for preparing granules in the pharmaceutical industry. It uses airflow to suspend materials in a boiling state and combines this with a spray binder to achieve granulation.

[0003] Existing technologies mainly employ bottom-inlet fluidized bed granulators and pulse-flow granulators. Bottom-inlet fluidized bed granulators distribute airflow through a sieve plate, which results in large particle size differences and high wall-sticking loss due to uneven material fluidization. Traditional pulse control modes can reduce particle agglomeration through intermittent airflow, but the control is complex and it is difficult to eliminate caking. Therefore, existing technologies cannot meet the industry's requirements for low raw material loss, stable core fluidization, and effective particle yield.

[0004] Therefore, this application provides a fluidized bed granulator. Utility Model Content

[0005] To address the shortcomings of existing technologies, this application provides a fluidized bed granulator that overcomes these deficiencies. Existing technologies primarily employ bottom-inlet fluidized bed granulators and pulse-flow granulators. Bottom-inlet fluidized bed granulators distribute airflow through a sieve plate, resulting in uneven material fluidization, large particle size variations, and high wall-sticking loss rates. While traditional pulse control modes can reduce particle agglomeration through intermittent airflow, they are complex to control and struggle to eliminate clumping. Therefore, existing technologies cannot meet the industry's demands for low raw material loss, stable core fluidization, and high particle yield.

[0006] To achieve the above objectives, this application provides the following technical solution: a fluidized bed granulator, comprising a support frame, an organic body fixedly mounted on the top of the support frame, an upper cylinder, a granulation chamber, and a main air chamber distributed from top to bottom inside the organic body, and the upper cylinder, granulation chamber, and main air chamber being interconnected, a cyclone separator fixedly mounted on the top of the organic body, a circulating fan fixedly mounted on the support frame, an exhaust pipe connecting the extraction end of the circulating fan to the cyclone separator, a return air pipe connecting the discharge end of the circulating fan to the main air chamber, a finned heater fixedly mounted in the middle of the return air pipe, an air distribution plate fixedly mounted at the connection between the main air chamber and the granulation chamber, a motor fixedly mounted at the bottom of the air distribution plate, a rotating shaft mounted at the output end of the motor, a blade fixedly mounted at the top of the rotating shaft, and a nozzle provided at the top of the upper cylinder.

[0007] By adopting the above technical solution, after the material is put into the main air chamber, the circulating fan is started to send gas into the main air chamber through the return air pipe. The airflow is evenly distributed after passing through the air distribution plate and then enters the granulation bin. After the material is put into the main air chamber, it forms a suspended flow. Then, the motor is started to drive the rotating shaft and blades to rotate, disturbing the material flow and forcing the material to form a vortex motion, thereby preventing the particles from agglomerating. At the same time, the nozzle evenly sprays the adhesive onto the material, atomizes it and covers the surface of the particles. When the circulating fan sends the gas into the main air chamber through the return air pipe, the gas is heated by the finned heater, and the hot air dries the particles at the same time. This device has a high degree of automation, improves the uniformity of particle size distribution and core fluidization stability, and reduces the wall adhesion loss rate.

[0008] As a preferred technical solution of this application, a temperature sensor and a humidity sensor are fixedly installed inside the body at the top of the upper cylinder. The temperature sensor and humidity sensor are located on both sides of the bottom of the cyclone separator. A controller is fixedly installed on one side of the bracket. The controller is electrically connected to both the temperature sensor and the humidity sensor. The circulating fan and the finned heater are both electrically connected to the controller.

[0009] By adopting the above technical solution, the temperature and humidity inside the machine are monitored in real time by temperature and humidity sensors, and the data is fed back to the controller. The controller automatically adjusts the heating power of the finned heater according to the preset temperature and humidity range, which helps to shorten the subsequent drying time and maintain a stable granulation environment, thereby improving the automation level of the device.

[0010] As a preferred technical solution of this application, the nozzle is specifically a two-fluid nozzle, with an adhesive delivery pipe installed at the top of the nozzle and a compressed air delivery pipe installed at the bottom of the nozzle.

[0011] By adopting the above technical solution, the adhesive enters the nozzle through the adhesive delivery pipe, and compressed air enters the nozzle simultaneously through the compressed air delivery pipe. The nozzle fully mixes the adhesive and compressed air and atomizes and sprays them evenly onto the material. The uniform spraying effect helps to reduce the adhesion of the adhesive to the inner wall of the machine and reduce raw material loss.

[0012] As a preferred technical solution of this application, a bag filter is installed in the middle of the exhaust pipe.

[0013] By adopting the above technical solution, the gas drawn by the circulating fan is filtered by a cyclone separator, and the filtered gas is further finely filtered by a bag filter, thereby improving the cleanliness of the gas returning to the machine.

[0014] As a preferred technical solution of this application, the inner wall of the body is provided with a mirror polished layer.

[0015] By adopting the above technical solution, and by setting the inner wall of the machine body to a mirror polished layer, the friction and adhesion between the material and the inner wall of the machine body are further reduced, thereby achieving the purpose of reducing raw material loss and increasing particle yield.

[0016] As a preferred technical solution of this application, an air exchange pipe is fixedly installed at the bottom of the machine body, the air exchange pipe is connected to the main air chamber, and an electric control valve is fixedly installed inside the air exchange pipe. A chamber door is hinged to the bottom of the machine body on one side of the granulation chamber.

[0017] By adopting the above technical solution, after granulation, the granules are taken out through the hopper door, and the air circulation in the ventilation pipe is controlled by the electric control valve, thereby ventilating the machine body and improving its practicality during use.

[0018] As a preferred technical solution of this application, one side of the finned heater is fixedly installed with the bracket, and support rods are fixedly installed on both sides of the motor, with the top of the support rods fixedly installed with the air distribution plate.

[0019] By adopting the above technical solutions, the stability of the motor after installation is improved by using the support rod, and the stability of the finned heater after installation is improved by connecting the finned heater to the bracket.

[0020] As a preferred technical solution of this application, a bearing is fixedly installed at the connection between the rotating shaft and the air distribution plate.

[0021] By adopting the above technical solution, the smoothness of the rotating shaft during operation is improved through the use of bearings, thus enhancing its practicality in use.

[0022] The beneficial effects of this application are:

[0023] 1. After the material is fed into the main air chamber, the circulating fan is started to send gas into the main air chamber through the return air pipe. The airflow is evenly distributed after passing through the air distribution plate and then enters the granulation bin. After the material is fed into the main air chamber, it forms a suspended flow. Then, the motor is started to drive the rotating shaft and blades to rotate, disturbing the material flow and forcing the material to form a vortex motion, thereby preventing the particles from agglomerating. At the same time, the nozzles evenly spray the adhesive onto the material, atomizing it and covering the surface of the particles. When the circulating fan sends the gas into the main air chamber through the return air pipe, the gas is heated by the finned heater, and the hot air completes the drying at the same time. This device has a high degree of automation, improves the uniformity of particle size distribution and core fluidization stability, and reduces the wall adhesion loss rate.

[0024] 2. Temperature and humidity sensors monitor the temperature and humidity inside the machine in real time and feed the data back to the controller. The controller automatically adjusts the heating power of the finned heater according to the preset temperature and humidity range, which helps to shorten the subsequent drying time and maintain a stable granulation environment, thus improving the automation level of the device. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of this application;

[0026] Figure 2 This is a partial cross-sectional structural diagram of this application;

[0027] Figure 3 This is a partial structural diagram of this application;

[0028] Figure 4 for Figure 2 Enlarged structural diagram at point A in the middle.

[0029] In the diagram: 1. Support frame; 2. Machine body; 201. Upper cylinder; 202. Granulation bin; 203. Main air chamber; 3. Cyclone separator; 5. Circulating fan; 6. Exhaust duct; 7. Return duct; 8. Finned heater; 9. Air distribution plate; 10. Bearing; 11. Motor; 12. Rotating shaft; 13. Paddle; 14. Nozzle; 15. Adhesive delivery pipe; 16. Compressed air delivery pipe; 17. Baghouse dust collector; 18. Temperature sensor; 19. Humidity sensor; 20. Controller; 21. Air exchange pipe; 22. Electrically controlled valve; 23. Support rod; 24. Bin door. Detailed Implementation

[0030] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0031] Reference Figure 1-4A fluidized bed granulator includes a support frame 1, with a body 2 fixedly mounted on top of the support frame 1. Inside the body 2, from top to bottom, are an upper cylinder 201, a granulation chamber 202, and a main air chamber 203, all interconnected. A cyclone separator 3 is fixedly mounted on top of the body 2, and a circulating fan 5 is fixedly mounted on the support frame 1. An exhaust pipe 6 connects the extraction end of the circulating fan 5 to the cyclone separator 3, and the discharge end of the circulating fan 5 connects to the main air chamber 203. A return air duct 7 is provided, and a finned heater 8 is fixedly installed in the middle of the return air duct 7. An air distribution plate 9 is fixedly installed at the connection between the main air chamber 203 and the granulation chamber 202. A motor 11 is fixedly installed at the bottom of the air distribution plate 9. A rotating shaft 12 is installed at the output end of the motor 11. A blade 13 is fixedly installed at the top of the rotating shaft 12. A nozzle 14 is provided at the top of the upper cylinder 201. The nozzle 14 is specifically a two-fluid nozzle. An adhesive delivery pipe 15 is installed at the top of the nozzle 14. A compressed air delivery pipe 16 is installed at the bottom of the nozzle 14.

[0032] After the material is fed into the main air chamber 203, the circulating fan 5 is started to send gas into the main air chamber 203 through the return air pipe 7. The airflow is evenly distributed by the air distribution plate 9 and then enters the granulation chamber 202. After the material is fed into the main air chamber 203, it forms a suspended flow. Then, the motor 11 is started to drive the rotating shaft 12 and the blades 13 to rotate, disturbing the material flow and forcing the material to form a vortex motion, thereby preventing the particles from agglomerating. At the same time, the nozzle 14 evenly sprays the adhesive onto the material, atomizes it, and covers the surface of the particles. The circulating fan 5 sends gas into the main air chamber 203 through the return air pipe 7. At 3 o'clock, the gas is heated by the finned heater 8, and the hot air is dried at the same time. This device has a high degree of automation, which improves the uniformity of particle size distribution and core fluidization stability, and reduces the wall adhesion loss rate. The temperature and humidity inside the machine body 2 are monitored in real time by the temperature sensor 18 and the humidity sensor 19, and the data is fed back to the controller 20. The controller 20 automatically adjusts the heating power of the finned heater 8 according to the preset temperature and humidity range, which helps to shorten the subsequent drying time and maintain a stable granulation environment, thus improving the automation level of the device.

[0033] Reference Figure 1-3 Inside the body 2, a temperature sensor 18 and a humidity sensor 19 are fixedly installed on the top of the upper cylinder 201. The temperature sensor 18 and the humidity sensor 19 are located on both sides of the bottom of the cyclone separator 3. A controller 20 is fixedly installed on one side of the bracket 1. The controller 20 is electrically connected to both the temperature sensor 18 and the humidity sensor 19. The circulating fan 5 and the finned heater 8 are also electrically connected to the controller 20. A bag filter 17 is installed in the middle of the exhaust pipe 6.

[0034] Temperature and humidity inside the machine body 2 are monitored in real time by temperature sensor 18 and humidity sensor 19, and the data is fed back to controller 20. Controller 20 automatically adjusts the heating power of finned heater 8 according to the preset temperature and humidity range, which helps to shorten the subsequent drying time and maintain a stable granulation environment, thereby improving the automation level of the device. The gas drawn by circulating fan 5 is filtered by cyclone separator 3, and the filtered gas is further finely filtered by bag filter 17, thereby improving the cleanliness of the gas returning to the machine body 2.

[0035] Reference Figure 2-4 The inner wall of the machine body 2 is set with a mirror polished layer; one side of the finned heater 8 is fixedly installed with the bracket 1, and both sides of the motor 11 are fixedly installed with support rods 23, the top of the support rods 23 is fixedly installed with the air distribution plate 9; by setting the inner wall of the machine body 2 with a mirror polished layer, the friction and adhesion between the material and the inner wall of the machine body 2 are further reduced, thereby achieving the purpose of reducing raw material loss and increasing particle yield; the support rods 23 improve the stability of the motor 11 after installation, and the connection between the finned heater 8 and the bracket 1 improves the stability of the finned heater 8 after installation.

[0036] Reference Figure 2-4 A ventilation pipe 21 is fixedly installed at the bottom of the machine body 2. The ventilation pipe 21 is connected to the main air chamber 203, and an electric control valve 22 is fixedly installed inside the ventilation pipe 21. A chamber door 24 is hinged to one side of the granulation chamber 202 at the bottom of the machine body 2. A bearing 10 is fixedly installed at the connection between the rotating shaft 12 and the air distribution plate 9. After granulation, the granules are taken out through the chamber door 24. The air circulation in the ventilation pipe 21 is controlled by the electric control valve 22 to ventilate the machine body 2, thereby improving its practicality during use. The bearing 10 improves the smoothness of the rotating shaft 12 during operation, further enhancing its practicality during use.

[0037] Working principle: After the material is put into the main air chamber 203, the circulating fan 5 is started to send gas into the main air chamber 203 through the return air pipe 7. The airflow is evenly distributed after passing through the air distribution plate 9 and then enters the granulation chamber 202. After the material is put into the main air chamber 203, it forms a suspended flow. Then, the motor 11 is started to drive the rotating shaft 12 and the blades 13 to rotate, which interferes with the material flow and forces the material to form a vortex motion, thereby preventing the particles from agglomerating. At the same time, the nozzle 14 evenly sprays the adhesive onto the material, atomizes it and covers the surface of the particles. The circulating fan 5 sends the gas into the main air chamber 203 through the return air pipe 7. In chamber 203, the gas is heated by the finned heater 8, and the hot air is dried simultaneously. This device has a high degree of automation, which improves the uniformity of particle size distribution and core fluidization stability, and reduces the wall adhesion loss rate. The temperature and humidity inside the machine body 2 are monitored in real time by temperature sensor 18 and humidity sensor 19, and the data is fed back to controller 20. Controller 20 automatically adjusts the heating power of finned heater 8 according to the preset temperature and humidity range, which helps to shorten the subsequent drying time and maintain a stable granulation environment, thus improving the automation level of this device.

[0038] The temperature and humidity inside the machine body 2 are monitored in real time by temperature sensor 18 and humidity sensor 19, and the data is fed back to controller 20. Controller 20 automatically adjusts the heating power of finned heater 8 according to the preset temperature and humidity range, which helps to shorten the subsequent drying time and maintain a stable granulation environment, thereby improving the automation level of the device. The gas drawn by circulating fan 5 is filtered by cyclone separator 3, and the filtered gas is further finely filtered by bag filter 17, thereby improving the cleanliness of the gas returning to the machine body 2.

[0039] Meanwhile, by setting the inner wall of the machine body 2 to a mirror polished layer, the friction and adhesion between the material and the inner wall of the machine body 2 are further reduced, thereby reducing raw material loss and increasing the granule yield. After granulation, the granules are taken out through the hopper door 24, and the air circulation in the ventilation pipe 21 is controlled by the electric control valve 22 to ventilate the inside of the machine body 2, thereby improving its practicality during use.

[0040] In addition, the support rod 23 improves the stability of the motor 11 after installation, the connection between the finned heater 8 and the bracket 1 improves the stability of the finned heater 8 after installation, and the bearing 10 improves the smoothness of the rotating shaft 12 during operation, thus improving its practicality.

[0041] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Although this application 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 this application should be included within the protection scope of this application.

Claims

1. A fluid bed granulator comprising a support (1), characterised in that, An organic body (2) is fixedly installed on the top of the support (1). The interior of the organic body (2) comprises an upper cylinder (201), a granulation chamber (202), and a main air chamber (203) arranged from top to bottom. The upper cylinder (201), granulation chamber (202), and main air chamber (203) are connected. A cyclone separator (3) is fixedly installed on the top of the organic body (2). A circulating fan (5) is therefore fixedly installed on the support (1). An exhaust pipe (6) connects the extraction end of the circulating fan (5) to the cyclone separator (3). A return air pipe (7) is connected between the discharge end of the machine (5) and the main air chamber (203). A finned heater (8) is fixedly installed in the middle of the return air pipe (7). A distribution plate (9) is fixedly installed at the connection between the main air chamber (203) and the granulation bin (202). A motor (11) is fixedly installed at the bottom of the distribution plate (9). A rotating shaft (12) is installed at the output end of the motor (11). A blade (13) is fixedly installed at the top of the rotating shaft (12). A nozzle (14) is provided at the top of the upper cylinder (201).

2. A fluid bed granulator according to claim 1, characterised in that A temperature sensor (18) and a humidity sensor (19) are fixedly installed inside the body (2) at the top of the upper cylinder (201). The temperature sensor (18) and the humidity sensor (19) are located on both sides of the bottom of the cyclone separator (3). A controller (20) is fixedly installed on one side of the bracket (1). The controller (20) is electrically connected to the temperature sensor (18) and the humidity sensor (19). The circulating fan (5) and the finned heater (8) are both electrically connected to the controller (20).

3. A fluid bed granulator according to claim 1, wherein The nozzle (14) is specifically a two-fluid nozzle, with an adhesive delivery pipe (15) installed at the top of the nozzle (14) and a compressed air delivery pipe (16) installed at the bottom of the nozzle (14).

4. A fluid bed granulator according to claim 1, wherein A bag filter (17) is installed in the middle of the exhaust pipe (6).

5. A fluid bed granulator according to claim 1, wherein The inner wall of the body (2) is set with a mirror polished layer.

6. A fluid bed granulator according to claim 1, wherein A ventilation pipe (21) is fixedly installed at the bottom of the machine body (2). The ventilation pipe (21) is connected to the main air chamber (203). An electric control valve (22) is fixedly installed inside the ventilation pipe (21). A chamber door (24) is hinged to the bottom of the machine body (2) on one side of the granulation chamber (202).

7. A fluid bed granulator according to claim 1, wherein One side of the finned heater (8) is fixedly installed with the bracket (1), and both sides of the motor (11) are fixedly installed with support rods (23), the top of the support rods (23) is fixedly installed with the air distribution plate (9).

8. A fluid bed granulator according to claim 1, wherein A bearing (10) is fixedly installed at the connection between the rotating shaft (12) and the air distribution plate (9).

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