Fluidized bed for pill drying
By using fluidized bed drying technology, spiral hot air is formed by cyclone sieve plates and sieve plate covers, which solves the problems of adhesion and unevenness in the drying process of pills, and realizes a highly efficient and simplified pill drying process, which is suitable for large-scale production.
Patent Information
- Application Number
- CN202520220614.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-12
- Publication Date
- 2026-03-03
- Estimated Expiration
- 2035-02-12
AI Technical Summary
Traditional methods for drying pills have problems such as pill sticking, unevenness, complex operation, unsuitability for large-scale production, and interference with wireless signals.
Fluidized bed drying technology is adopted, which uses a vortex sieve plate and sieve plate cover to form a spiral upward drying vortex hot air, which drives the pills to turn and roll. Combined with air volume and temperature regulation, dynamic drying is achieved.
It improves the uniformity and efficiency of pill drying, reduces pill sticking, simplifies the operation process, is highly adaptable, suitable for large-scale production, and reduces the risk of contamination.
Smart Images
Figure CN223965776U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of pill preparation technology, specifically a fluidized bed for drying pills. Background Technology
[0002] Traditional pills, such as water pills, honey pills, and paste pills, generally require a drying process. Dried pills are easier to preserve. Currently, the drying process for moist pills is generally carried out using ovens, microwaves, etc. Each of these drying methods has its limitations. For example, oven drying requires periodic turning of the pills to prevent them from clumping together and sticking to the drying trays; oven drying is a "static" drying process, which can easily result in uneven drying surfaces, such as water pills; oven drying requires manual adjustment of the drying trays to prevent excessive temperature differences between the top and bottom; microwave drying equipment has long conveyor belts, a complex structure, and is difficult to clean; microwave drying is subject to regulations, making large-scale use verification complex and cumbersome, and modifications difficult; microwave drying equipment interferes with wireless signals, which is detrimental to wireless data acquisition and intelligent applications in production equipment. Utility Model Content
[0003] The purpose of this invention is to address the problems existing in the prior art by providing a fluidized bed for drying pills.
[0004] The objective of this utility model is achieved through the following technical solution:
[0005] A fluidized bed for drying pills, characterized in that: the fluidized bed includes a machine base top ring and a boiling pot, the boiling pot containing the pills to be dried is arranged on the machine base top ring and a swirl screen plate is arranged at the bottom of the boiling pot, the drying hot air input into the machine base top ring is sent into the boiling pot through the swirl screen plate and forms a spiral upward drying swirl hot air, the drying swirl hot air can drive the pills to be dried in the boiling pot to turn and roll, thus constituting dynamic drying.
[0006] During use, a large amount of hot air is sent into the boiling pot through the top ring of the machine base and the vortex screen plate, generating a spiral upward airflow. The angle of the spiral can be adjusted according to the surface viscosity of the pills to be dried. The air volume is then adjusted to make the pills to be dried continuously tumble and dry under the action of the drying vortex hot air.
[0007] The cyclone screen plate is evenly distributed with cyclone holes, and a corresponding cyclone hole cover is arranged on the cyclone hole. The cyclone holes and the cyclone hole covers constitute the drying hot air channel of the cyclone screen plate.
[0008] The diameter of the swirl orifice is no greater than 90% of the diameter of the prepared pill product.
[0009] The swirl hole cover has an arc-shaped structure, with one end fixed to the swirl screen plate corresponding to the swirl hole side and the other end being a free end.
[0010] The tilt angle of the vortex orifice cover is acute.
[0011] The inclination angle of the vortex orifice cover is 10° to 80°.
[0012] The tilt angle of the vortex orifice cover is 40°±10°.
[0013] To address the issue of pills having a small rolling amplitude or even being difficult to roll near the center of rotation, a sieve cover is arranged in the middle of the cyclone sieve plate. The advantage of adding this sieve cover is that it can also increase the surrounding airflow, making the pills roll more easily.
[0014] The sieve plate cover has a conical structure.
[0015] Both the cyclone screen plate and the screen plate cover are made of stainless steel.
[0016] The temperature of the drying hot air shall not exceed 100℃, and the air volume of the drying hot air shall not exceed 6000 m³ / h. Furthermore, in the initial stage of dynamic drying, the temperature of the drying hot air shall not exceed 60℃, and the air volume of the drying hot air shall be 3500 m³ / h to 4000 m³ / h.
[0017] Compared with the prior art, the present invention has the following advantages:
[0018] The fluidized bed of this invention adopts the drying principle of a one-step granulator, changing the original direct current hot air to swirling hot air. When the pellets are dried in the boiling pot, they can roll along the designed direction in the boiling pot under the drive of the swirling hot air, without the need for manual intervention, thereby avoiding direct contact between operators and the product and reducing pollution and cross-contamination.
[0019] The fluidized bed of this invention can change the cross-sectional area of the cyclone sieve plate by changing the size of the sieve plate cover in the middle of the cyclone sieve plate. Combined with the air intake, the rolling speed of the pills can be adjusted, and even adjusted to peristalsis, to adapt to different pill surface polishing processes, thereby improving the adaptability of the product.
[0020] The fluidized bed of this invention can improve the surface smoothness of pills by rolling and peristalsis during the drying process, and can reduce the time of the previous process of polishing the pills; and the drying process is always accompanied by a large flow of hot air, which has high drying efficiency and saves drying time; thus saving labor time and improving production efficiency.
[0021] The fluidized bed of this invention can keep the pills rolling or peristaltic throughout the drying process, resulting in high drying uniformity and reducing adhesion between pills, thus making the pills less prone to sticking together and ensuring high moisture uniformity.
[0022] The fluidized bed of this invention uses a cyclone sieve plate and sieve plate cover with a smooth contact surface with the medicine, which is easy to disassemble, corrosion resistant, easy to clean, and conducive to the production of heat-sensitive materials. Attached Figure Description
[0023] Appendix Figure 1 This is a schematic diagram of the structure of the fluidized bed for drying pills provided by this utility model;
[0024] Appendix Figure 2 A schematic diagram of the structure of the cyclone screen plate provided by this utility model;
[0025] Appendix Figure 3 A schematic diagram of the working state of the cyclone screen plate provided by this utility model;
[0026] Appendix Figure 4 This is a schematic diagram of the structure of the sieve plate cover provided by this utility model.
[0027] Wherein: 1—Top ring of machine base; 2—Boiling pot; 3—Swirl screen plate; 4—Swirl hole; 5—Swirl hole cover; 6—Screen plate cover. Detailed Implementation
[0028] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0029] like Figure 1-4 As shown: A fluidized bed for drying pills, the fluidized bed includes a machine base top ring 1 and a boiling pot 2. The boiling pot 2, which contains the pills to be dried, is set on the machine base top ring 1, and a swirl screen plate 3 is arranged at the bottom of the boiling pot 2. The drying hot air input into the machine base top ring 1 is sent into the boiling pot 2 through the swirl screen plate 3 and forms a spiral upward drying swirl hot air. The drying swirl hot air can drive the pills to be dried in the boiling pot 2 to turn and roll, thus constituting dynamic drying.
[0030] Furthermore, the cyclone sieve plate 3 is evenly distributed with cyclone holes 4, the diameter of which is no larger than 90% of the diameter of the prepared pill. A corresponding cyclone hole cover 5 is arranged on the cyclone hole 4. The cyclone hole 4 and the cyclone hole cover 5 constitute the drying hot air channel of the cyclone sieve plate 3. The cyclone hole cover 5 has an arc-shaped structure. One end of the arc-shaped structure is fixed on the cyclone sieve plate 3 on the side corresponding to the cyclone hole 4, and the other end is a free end. The inclination angle of the cyclone hole cover 5 is an acute angle, preferably 10° to 80°, and more preferably 40°±10°.
[0031] Furthermore, a conical screen cover 6 is arranged in the middle of the cyclone screen plate 3. The screen cover 6 can solve the problem that the rolling amplitude of the pills to be dried near the center of rotation is small or even difficult to roll.
[0032] When using the fluidized bed provided by this utility model, such as Figure 1 , Figure 3As shown, the pills to be dried are drawn into the boiling pot 2 through a pipe. At this time, the "inlet temperature" of the drying hot air in the top ring 1 of the machine base generally does not exceed 60℃, and the "air volume" is set at 3500m³ / h~4000m³ / h. The "outlet temperature" of the boiling pot 2 is about 40℃-45℃. The air supply of the high-flow fan is adjusted according to the peristalsis of the pills to be dried in the boiling pot 2 to prevent the pills to stop peristalsis. At the same time, the "inlet temperature" of the drying hot air is adjusted to allow the pills to heat up slowly and dry their surface. As the surface dryness of the pills increases, the peristalsis of the pills will intensify. The "air volume" of the drying hot air is adjusted appropriately according to the appearance, color, and roundness of the pills. Provided the appearance of the pills to be dried meets the set standards, gradually increase the settings of the "airflow" and "inlet temperature" of the drying hot air. The "surface temperature of the pills to be dried" in the boiling pot 2 will also gradually increase. If there is a small amount of sticking of the pills to be dried, the "noise" program can be used to reduce sticking. When the "surface temperature of the pills to be dried" rises to 55℃±5℃, maintain the existing parameter settings. When the "surface temperature of the pills to be dried" rises to 60℃±2℃, maintain it for 50 minutes (at this time, the "airflow" of the drying hot air should generally not exceed 6000m³ / h, and the "inlet temperature" should not exceed 100℃). Enter the cooling stage, first reduce the "inlet temperature" of the drying hot air to 75℃ to allow the temperature of the dried pills to drop slowly, and then gradually reduce the setting of the "inlet temperature" of the drying hot air until the "surface temperature of the dried pills" drops below 38℃. Stop drying, remove from the pot, and spread out to cool.
[0033] In the above process, a high-flow fan blows hot drying air through a specially designed vortex sieve plate 3 with vortex holes 4 and vortex hole covers 5, causing the hot drying air to form a spiral upward drying vortex. The hot drying vortex blows the pills to be dried, causing them to turn, roll, and dry. In the dynamic drying process, the adhesion and deformation of the pills to be dried are reduced, and the surface smoothness of the pills to be dried is increased, thereby improving product quality and yield.
[0034] The fluidized bed provided by this invention can control the wind speed, air volume, and wind direction of the drying hot air by changing the inclination angle, rotation angle, and size of the swirl hole cover 5 on the swirl sieve plate 3, as well as the wind speed, air volume, and wind direction, to meet the requirements for drying pills with different characteristics (moisture content, pill size, viscosity). For example, for pills that are easy to dry, large, and not prone to sticking, the angle of the swirl hole cover 5 and the size of the swirl hole 4 can be increased to achieve low swirl and high wind speed for drying; conversely, the angle of the swirl hole cover 5 needs to be reduced to achieve high swirl and high rolling (peristalsis) to reduce adhesion, thereby achieving higher adaptability.
[0035] The advantages of the fluidized bed drying method using cyclone sieve plate 3 provided by this utility model are as follows: First, it can dry conventionally sized pills with high viscosity, such as water-honey pills, water pills, and paste pills; second, during the drying process, the pills continuously roll, which improves the surface smoothness of the pills, reduces the polishing time of damp pills, and can even achieve the corresponding standards by drying directly without polishing; third, it improves the uniformity of drying; and fourth, it improves the drying efficiency, shortens the drying process time, and increases the drying capacity by 10%-15% compared with traditional oven drying.
[0036] The above embodiments are only for illustrating the technical concept of this utility model and should not be construed as limiting the scope of protection of this utility model. Any modifications made to the technical solution based on the technical concept proposed by this utility model shall fall within the scope of protection of this utility model. Technologies not covered by this utility model can be implemented by existing technologies.
Claims
1. A fluidized bed for drying pills, characterized in that: The fluidized bed includes a base ring (1) and a boiling pot (2). The boiling pot (2) containing the pills to be dried is set on the base ring (1), and a swirl screen plate (3) is arranged at the bottom of the boiling pot (2). The drying hot air input into the base ring (1) is sent into the boiling pot (2) through the swirl screen plate (3) and forms a spiral upward drying swirl hot air. The drying swirl hot air can drive the pills to be dried in the boiling pot (2) to turn and roll, thus forming dynamic drying. The swirl screen plate (3) is evenly distributed with swirl holes (4), and a corresponding swirl hole cover (5) is arranged on the swirl holes (4). The swirl holes (4) and the swirl hole cover (5) constitute the drying hot air channel of the swirl screen plate (3).
2. The fluidized bed for drying pills according to claim 1, characterized in that: The diameter of the swirl hole (4) is not greater than 90% of the diameter of the prepared pill.
3. The fluidized bed for drying pills according to claim 1, characterized in that: The swirl hole cover (5) is an arc-shaped structure, and one end of the swirl hole cover (5) is fixed on the swirl screen plate (3) on the side of the corresponding swirl hole (4), while the other end is a free end.
4. The fluidized bed for drying pills according to claim 3, characterized in that: The tilt angle of the vortex orifice cover (5) is an acute angle.
5. The fluidized bed for drying pills according to claim 4, characterized in that: The inclination angle of the vortex orifice cover (5) is 10° to 80°.
6. The fluidized bed for drying pills according to claim 5, characterized in that: The tilt angle of the vortex orifice cover (5) is 40°±10°.
7. The fluidized bed for drying pills according to any one of claims 1-6, characterized in that: A screen cover (6) is arranged in the middle of the cyclone screen plate (3), and the screen cover (6) has a conical structure.
8. The fluidized bed for drying pills according to any one of claims 1-6, characterized in that: The temperature of the drying hot air shall not exceed 100℃ and the air volume of the drying hot air shall not exceed 6000m³ / h.
9. The fluidized bed for drying pills according to claim 8, characterized in that: The temperature of the drying hot air in the initial stage of dynamic drying does not exceed 60℃, and the air volume of the drying hot air is 3500m³ / h~4000m³ / h.