Vertical fluid bed dryer

Abstract

This utility model discloses a vertical fluidized bed dryer, relating to the field of pharmaceutical delivery technology. It includes a main body with an inlet and an outlet on its side wall. An exhaust pipe is fixedly connected to the side wall of the main body, and a buffer storage tank is located below the exhaust pipe. The two are fixedly connected via a return air pipe. Electric air valves are fixedly installed inside the inlet, return air pipe, and outlet. A flow-blocking baffle is fixedly installed inside the exhaust pipe, positioned between the main body and the return air pipe. An automatic granulator is fixedly connected to the bottom of the buffer storage tank. This vertical fluidized bed dryer can achieve full automation of the drying-discharging-granulation process, reducing manual intervention, improving production continuity, and increasing work efficiency, while also avoiding dust pollution.

Description

Technical Field

[0001] This utility model relates to the field of pharmaceutical delivery technology, and in particular to a vertical fluidized bed dryer. Background Technology

[0002] After drying in a traditional vertical fluidized bed dryer, the fluidized bed hopper must be manually pulled out, the hopper replaced, or the material in the hopper transferred to a granulator for granulation before the next granulation and drying operation can begin. Existing equipment lacks a material storage function, requiring frequent hopper replacements, interrupting the production process, and hindering seamless integration with downstream equipment, resulting in low efficiency. Transferring material to the granulator for granulation is mostly done manually, which is not only labor-intensive but also generates significant dust, making the production process cumbersome and prone to dust pollution. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a vertical fluidized bed dryer, which can solve the problems of the dryer requiring manual material transfer, low working efficiency, and dust pollution.

[0004] The objective of this utility model is achieved through the following technical solution:

[0005] A vertical fluidized bed dryer includes a main body. An inlet and an outlet are provided on the side wall of the main body, and an air inlet is provided at the bottom of the main body. A first screen is installed at the air inlet and fixedly connected to the inner wall of the main body. An exhaust pipe is fixedly connected to the side wall of the main body, positioned above the inlet and outlet. A buffer storage tank is positioned below the exhaust pipe, and the two are fixedly connected via a return air pipe. The outlet and the buffer storage tank are fixedly connected via a first conveying pipe. Electric air valves are fixedly installed inside the inlet, return air pipe, and outlet. A flow-blocking baffle is fixedly installed inside the exhaust pipe, positioned between the main body and the return air pipe. An automatic granulator is fixedly connected to the bottom of the buffer storage tank, and a discharge valve is fixedly installed at the connection point. A second conveying pipe is fixedly connected to the inlet, with one end of the second conveying pipe away from the inlet fixedly connected to the bottom of the automatic granulator.

[0006] Preferably, a breather is fixedly installed on the top of the buffer storage tank.

[0007] Preferably, a fixed storage tank is provided directly below the bottom of the automatic pelletizer. The storage tank includes a support frame and a receiving hopper. The receiving hopper is installed on the support frame and is located directly below the bottom of the automatic pelletizer.

[0008] Preferably, a humidity sensor, a particle level sensor, and a pipeline pressure sensor are fixedly installed inside the buffer storage tank.

[0009] Preferably, a second screen is fixedly installed on the inner wall of the buffer storage tank, and the second screen is located below the connection between the return air pipe and the buffer storage tank.

[0010] Preferably, a viewing window is provided on the side wall of the buffer storage tank.

[0011] Preferably, the buffer storage tank and the automatic granulator are connected by a connecting pipe, and the discharge valve is fixedly installed inside the connecting pipe.

[0012] Preferably, the buffer storage tank is cylindrical or conical.

[0013] Preferably, the electric air valve is an electric butterfly valve or an electric ball valve.

[0014] Preferably, the discharge valve is a butterfly valve.

[0015] The beneficial effects of this utility model are:

[0016] This utility model discloses a vertical fluidized bed dryer. An exhaust pipe is fixedly connected to the side wall of the main body, and a buffer storage tank is installed below the exhaust pipe. The two are fixedly connected by a return air pipe. Electric air valves are fixedly installed in the inlet, return air pipe, and outlet. A flow-blocking baffle is fixedly installed inside the exhaust pipe, positioned between the main body and the return air pipe. An automatic granulator is fixedly connected to the bottom of the buffer storage tank, and a discharge valve is fixedly installed at the connection point. This allows the vertical fluidized bed dryer to achieve fully automated drying-discharging-granulation processes, reducing manual intervention, improving production continuity, increasing work efficiency, and avoiding dust pollution. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 for Figure 1 A magnified view of a portion of region A;

[0019] Figure 3 This is a schematic diagram of the structure of the present invention, which includes a storage tank.

[0020] In the diagram: 10. Main body; 20. Feed inlet; 30. Discharge outlet; 40. Air inlet; 50. First screen; 60. Exhaust pipe; 70. Buffer storage tank; 71. Humidity sensor; 72. Particle level sensor; 73. Pipeline pressure sensor; 80. Return air pipe; 90. Electric air valve; 100. Baffle plate; 110. First conveying pipe; 120. Automatic granulator; 130. Discharge valve; 140. Breather; 150. Second conveying pipe; 160. Storage tank; 161. Support frame; 162. Receiving hopper; 170. Second screen; 180. Viewing window; 190. Connecting pipe. Detailed Implementation

[0021] To make the technical problems solved, the technical solutions and the beneficial effects of the utility model clearer, the utility model will be further described below in conjunction with the accompanying drawings and embodiments.

[0022] The embodiments provided by this utility model are as follows: Figures 1-3 As shown, a vertical fluidized bed dryer includes a main body 10. An inlet 20 and an outlet 30 are provided on the side wall of the main body 10. An air inlet 40 is provided at the bottom of the main body 10. A first screen 50 is installed at the air inlet 40 and is fixedly connected to the inner wall of the main body 10. An exhaust pipe 60 is fixedly connected to the side wall of the main body 10. The exhaust pipe 60 is positioned above the inlet 20 and the outlet 30. A buffer storage tank 70 is positioned below the exhaust pipe 60. The two are fixedly connected by a return air pipe 80. The outlet 30 and the buffer storage tank... The buffer storage tank 70 is fixedly connected to the first conveying pipe 110. An electric air valve 90 is fixedly installed in the return air pipe 80 and the discharge port 30. A flow-blocking baffle 100 is fixedly installed in the exhaust pipe 60. The flow-blocking baffle 100 is located between the main body 10 and the return air pipe 80. An automatic pelletizer 120 is fixedly connected to the bottom of the buffer storage tank 70. A discharge valve 130 is fixedly installed at the connection between the two. A second conveying pipe 150 is fixedly connected to the inlet 20. The end of the second conveying pipe 150 away from the inlet 20 can be fixedly connected to the bottom of the automatic pelletizer 120.

[0023] The device has drying mode, discharge mode and granulation mode, and the operator can switch the device mode by controlling the PLC controller.

[0024] When the device is started, the airflow passes through the heater and reaches the temperature required for drying. Then, it is continuously input into the main body 10 from the air inlet 40. The airflow diversion device outside the air duct 60 continuously draws the airflow out of the main body 10 and the buffer storage tank 70.

[0025] When the device is in drying mode, the electric air valve 90 at the feed inlet 20 is opened, the electric air valves 90 at the discharge outlet 30 and the return air pipe 80 are closed, and the baffle 100 is opened. After the operator draws the material into the main body 10 through the feed inlet 20, the electric air valve 90 at the feed inlet 20 is closed. The moisture on the material flows out of the device along the air duct 60 with the gas, thus achieving the drying function of the material. The baffle 100 is used to block the material and prevent the material from being drawn out together. At this time, the airflow only passes through the main body 10, and the automatic granulator 120 is in a stopped state.

[0026] When the device is in discharge mode, the electric air valves 90 at the discharge port 30 and the return air pipe 80 are opened, the baffle 100 is closed, and the electric air valve 90 at the feed port 20 can be opened according to the discharge situation to form a lateral airflow, which leads the material to the discharge port 30. The exhaust device outside the exhaust pipe 60 continuously draws the material out of the buffer storage tank 70. The material is driven by the airflow and enters the buffer storage tank 70 through the first conveying pipe 110. At this time, the airflow continuously enters the buffer storage tank 70 from the air inlet 40, and the automatic granulator 120 is in a stopped state.

[0027] When the device is in pelleting mode, the electric air valves 90 at the discharge port 30 and return air pipe 80 are closed, and the discharge valve 130 is opened. At this time, the material in the buffer storage tank 70 enters the automatic pelletizer 120 through the discharge valve 130. The operator starts the automatic pelletizer 120, which crushes the material inside into particles that meet the production requirements. The particles flow out from the bottom of the automatic pelletizer 120. In this mode, the material can simultaneously complete the feeding and drying operations of the main body 10 for normal materials in the drying mode, without affecting the pelleting operation of the material in the buffer storage tank 70, thus improving work efficiency.

[0028] Preferably, a breather 140 is fixedly installed on the top of the buffer storage tank 70. When the equipment is in the pelletizing mode, the material level in the buffer storage tank 70 continues to drop. The breather 140 can reduce the pressure difference between the air pressure inside the buffer storage tank 70 and the outside, ensuring that the material can smoothly enter the automatic pelletizer 120.

[0029] Preferably, a fixed storage tank 160 is provided directly below the bottom of the automatic granulator 120. The storage tank 160 includes a support frame 161 and a receiving hopper 162. The receiving hopper 162 is installed on the support frame 161 and is located directly below the bottom of the automatic granulator 120, which facilitates the transfer of dried materials to subsequent processes such as mixing, filling or tableting by the workers, thereby improving work efficiency.

[0030] Preferably, a humidity sensor 71, a particle level sensor 72, and a pipeline pressure sensor 73 are fixedly installed inside the buffer storage tank 70. The humidity sensor 71 is used to detect the humidity of the material and determine the drying completion status. When the material moisture content is too high or the material is clumped and not completely dried, the device can be switched to the pelletizing mode. Simply connect the second conveying pipe 150 connected to the feed inlet 20 to the bottom of the automatic pelletizer 120, and open the electric air valve 90 of the feed inlet 20 to re-particle the material with high moisture content or clumped material and suck it into the main body 10. Then the device enters the drying mode to further dry the material. The particle level sensor 72 is used to monitor the height of the material piled up in the buffer storage tank 70. When the material piles up to a specified height, the operator uses the PLC controller to open the discharge valve 130 to let the material fall into the automatic pelletizer 120. The pipeline pressure sensor 73 is used to monitor the pressure at the bottom of the buffer storage tank 70 to prevent material blockage or leakage.

[0031] Preferably, a second screen 170 is fixedly installed on the inner wall of the buffer storage tank 70. The second screen 170 is located below the connection between the return air pipe 80 and the buffer storage tank 70. When the equipment is in the discharge mode, the second screen 170 can prevent the material in the buffer storage tank 70 from being sucked out from the return air pipe 80. The second screen 170 plays a blocking role. The mesh size of the second screen 170 can be 60 mesh, 80 mesh, 100 mesh, etc.

[0032] Preferably, a viewing window 180 is provided on the side wall of the buffer storage tank 70 to facilitate staff to observe the material condition inside the buffer storage tank 70.

[0033] Preferably, the buffer storage tank 70 and the automatic granulator 120 are connected by a connecting pipe 190, and the discharge valve 130 is fixedly installed inside the connecting pipe 190, which facilitates the installation and disassembly of the discharge valve 130 by the staff.

[0034] Preferably, the buffer storage tank 70 is cylindrical or conical. Manufacturers can freely design the shape of the buffer storage tank 70 according to the usage conditions to improve the practicality of the equipment.

[0035] Preferably, the electric air valve 90 is an electric butterfly valve or an electric ball valve. Electric butterfly valves have advantages such as low cost, fast opening and closing speed, small size, and light weight, while electric ball valves have advantages such as good sealing performance, convenient remote control, and low resistance when fully open. In use, the PLC controller automatically controls the opening and closing of the electric air valve 90 according to the drying / discharging / granulation mode. Manufacturers can choose according to actual needs.

[0036] Preferably, the discharge valve 130 is a butterfly valve.

[0037] The working principle of this embodiment, and its more specific process, are as follows:

[0038] The device has drying mode, discharge mode and granulation mode, and the operator can switch the device mode by controlling the PLC controller.

[0039] When the device is started, the airflow passes through the heater and reaches the temperature required for drying. Then, it is continuously input into the main body 10 from the air inlet 40. The airflow diversion device outside the air duct 60 continuously draws the airflow out of the main body 10 and the buffer storage tank 70.

[0040] When the device is in drying mode, the electric air valve 90 at the feed inlet 20 is opened, the electric air valves 90 at the discharge outlet 30 and the return air pipe 80 are closed, and the baffle 100 is opened. After the operator draws the material into the main body 10 through the feed inlet 20, the electric air valve 90 at the feed inlet 20 is closed. The moisture on the material flows out of the device along the air duct 60 with the gas, thus achieving the drying function of the material. The baffle 100 is used to block the material and prevent the material from being drawn out together. At this time, the airflow only passes through the main body 10, and the automatic granulator 120 is in a stopped state.

[0041] When the device is in discharge mode, the electric air valves 90 at the discharge port 30 and the return air pipe 80 are opened, the baffle 100 is closed, and the electric air valve 90 at the feed port 20 can be opened according to the discharge situation to form a lateral airflow, which leads the material to the discharge port 30. The suction device outside the air duct 60 continuously draws the material out of the buffer storage tank 70. The material is driven by the airflow and enters the buffer storage tank 70 through the first conveying pipe 110 to realize the material conveying function. The second screen 170 is used to block the material and prevent the material from being drawn out together. At this time, the airflow continuously flows from the air inlet 40 to the buffer storage tank 70, and the automatic granulator 120 is in a stopped state.

[0042] When the device is in pelletizing mode, the electric air valves 90 at the discharge port 30 and return air pipe 80 are closed, and the discharge valve 130 is opened. At this time, the material in the buffer storage tank 70 enters the automatic pelletizer 120 through the discharge valve 130. The operator starts the automatic pelletizer 120, which crushes the material inside into particles that meet the production requirements. The particles flow out from the bottom of the automatic pelletizer 120 and fall into the receiving hopper 162. In this mode, the material can simultaneously complete the feeding and drying operations of the main body 10 for normal materials in the drying mode, without affecting the pelletizing operation of the material in the buffer storage tank 70, thus improving work efficiency.

[0043] After the material enters the device, the drying mode, discharge mode, and granulation mode are typically activated sequentially. The drying mode dries the material, the discharge mode conveys the material, and the granulation mode crushes and discharges the material. When the material enters the buffer storage tank 70, the humidity sensor 71 detects the moisture content of the material. If the moisture content is higher than the standard, the device will issue an alarm. The operator connects the second conveying pipe 150 to the bottom of the automatic granulator 120, and then opens the discharge valve 130. The material falls into the second conveying pipe 150 after passing through the automatic granulator 120. The device is then switched back to the drying mode. The air extraction device outside the exhaust pipe 60 continuously extracts air from the main body 10 and the second conveying pipe 150. The airflow carries the material from the second conveying pipe 150 into the main body 10, and then the three modes of the device are repeated.

[0044] Operators can use the PLC controller to switch between drying / discharging / granulation modes according to a preset program, and simultaneously control the start and stop of the electric air valve 90, the baffle 100, the discharge valve 130, and the automatic granulator 120. Through the above operations, the entire process of drying-discharging-granulation is automated, reducing manual intervention and improving production continuity.

[0045] It should be noted that:

[0046] The automatic granulator 120 in this solution is existing technology. As long as it can achieve the functions of crushing and screening materials, it can be applied to the device in this solution.

[0047] The vertical fluidized bed dryer of this invention features an exhaust pipe 60 fixedly connected to the side wall of the main body 10, a buffer storage tank 70 located below the exhaust pipe 60, and the two fixedly connected by a return air pipe 80. Electric air valves 90 are fixedly installed inside the inlet 20, the return air pipe 80, and the outlet 30. A flow-blocking baffle 100 is fixedly installed inside the exhaust pipe 60, positioned between the main body 10 and the return air pipe 80. An automatic granulator 120 is fixedly connected to the bottom of the buffer storage tank 70, and a discharge valve 130 is fixedly installed at the connection point. This allows the vertical fluidized bed dryer to achieve fully automated drying-discharging-granulation processes, reducing manual intervention, improving production continuity, increasing work efficiency, and avoiding dust pollution.

[0048] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model shall fall within the protection scope of the present utility model.

Claims

1. A vertical fluid bed dryer comprising a main body (10), characterised in that: The main body (10) has a feed inlet (20) and a discharge outlet (30) on its side wall. An air inlet (40) is located at the bottom of the main body (10). A first screen (50) is installed at the air inlet (40) and is fixedly connected to the inner wall of the main body (10). An air duct (60) is fixedly connected to the side wall of the main body (10). The air duct (60) is positioned above the feed inlet (20) and the discharge outlet (30). A buffer storage tank (70) is located below the air duct (60). The two are fixedly connected by a return air pipe (80). The discharge outlet (30) and the buffer storage tank (70) are connected by a first conveying pipe (11). 0) Fixed connection, an electric air valve (90) is fixedly installed in the feed inlet (20), the return air pipe (80) and the discharge port (30), a flow-blocking baffle (100) is fixedly installed in the air duct (60), the flow-blocking baffle (100) is installed between the main body (10) and the return air pipe (80), an automatic pelletizer (120) is fixedly connected to the bottom of the buffer storage tank (70), a discharge valve (130) is fixedly installed at the connection between the two, a second conveying pipe (150) is fixedly connected to the feed inlet (20), and the end of the second conveying pipe (150) away from the feed inlet (20) can be fixedly connected to the bottom of the automatic pelletizer (120).

2. A vertical fluid bed dryer according to claim 1, characterised in that: A breather (140) is fixedly installed on the top of the buffer storage tank (70).

3. A vertical fluid bed dryer according to claim 1, wherein: A fixed storage tank (160) is provided directly below the bottom of the automatic pelletizer (120). The storage tank (160) includes a support frame (161) and a receiving hopper (162). The receiving hopper (162) is installed on the support frame (161) and is located directly below the bottom of the automatic pelletizer (120).

4. A vertical fluid bed dryer according to claim 1, wherein: The buffer storage tank (70) is fixedly equipped with a humidity sensor (71), a particle level sensor (72), and a pipeline pressure sensor (73).

5. A vertical fluid bed dryer according to claim 1, wherein: A second screen (170) is fixedly installed on the inner wall of the buffer storage tank (70), and the second screen (170) is located below the connection between the return air pipe (80) and the buffer storage tank (70).

6. A vertical fluid bed dryer according to claim 1, wherein: A viewing window (180) is provided on the side wall of the buffer storage tank (70).

7. A vertical fluid bed dryer according to claim 1, wherein: The buffer storage tank (70) and the automatic granulator (120) are connected by a connecting pipe (190), and the discharge valve (130) is fixedly installed inside the connecting pipe (190).

8. A vertical fluid bed dryer according to claim 1, wherein: The buffer storage tank (70) is a cylinder or a cone.

9. A vertical fluid bed dryer according to claim 1, wherein: The electric air valve (90) is an electric butterfly valve or an electric ball valve.

10. A vertical fluid bed dryer according to claim 1, wherein: The discharge valve (130) is a butterfly valve.

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