Belt dryer for traditional Chinese medicine decoction piecesIt is a continuous drying equipment designed specifically for drying traditional Chinese medicine decoction pieces, widely used in the Chinese herbal medicine processing industry. This device continuously transports materials through a conveyor belt to achieve efficient and uniform drying processes, especially suitable for sheet and granular Chinese medicinal materials with good breathability. Its working principle is based on the hot air circulation system, where materials are evenly laid on the mesh belt by the feeding device and enter the drying zone as the mesh belt moves. Hot air or steam passes through the material layer from bottom to top or from top to bottom, increasing the contact area and promoting water evaporation. The dried material continues to move to the discharge port under the drive of the mesh belt, completing the entire drying process. The equipment adopts a multi unit design, and the temperature of each unit can be independently adjusted to achieve precise temperature control and meet the needs of different drying stages.
Belt dryer for traditional Chinese medicine decoction piecesIt is a specialized equipment for drying traditional Chinese medicine decoction pieces, which mainly includes the following components:
1. Feeding system: responsible for conveying traditional Chinese medicine decoction pieces to the starting end of the dryer, usually including components such as hoppers, conveyor belts, or screw feeders. The hopper is used to store Chinese herbal medicine slices to be dried, while the conveyor belt or screw feeder evenly transports the slices to the fabric system.
2. Fabric system: Its function is to evenly distribute the traditional Chinese medicine decoction pieces conveyed by the feeding system on the conveyor belt of the dryer to ensure the uniformity of the drying process. Common fabric systems include vibrating fabric machines, swinging fabric machines, etc., which use vibration or swinging to evenly spread the slices on the mesh belt.
3. Inlet air filtration system: provides clean hot or cold air for the dryer, preventing impurities in the air from entering the interior of the dryer and affecting the drying effect and product quality. This system generally consists of primary filters, medium filters, and high-efficiency filters, which can effectively filter out impurities such as dust and particles in the air.
4. Heating and cooling system: It is a key component for achieving drying and cooling functions. Heating systems typically use equipment such as finned heat exchangers to heat air to a set temperature through heat exchange, providing a heat source for the drying process; The cooling system is used to cool the dried traditional Chinese medicine decoction pieces to a suitable temperature for subsequent packaging and storage.
5. Host: It is the core component of the dryer, including the box, conveyor belt, etc. The box adopts a segmented insulation frame structure, with the inner wall generally fully welded with stainless steel and the outer wall often made of stainless steel material. The insulation material is mostly ultra-fine glass wool to ensure the insulation performance and sealing of the box; The conveyor belt is driven by a variable frequency reduction motor, which moves the animal material from the feeding end to the discharging end of the box. Its speed can be adjusted by the frequency converter to control the residence time of the material.
6. Transmission system: composed of a variable frequency reduction motor, a conveyor chain, a transmission sprocket, a transmission shaft, and a tensioning device, responsible for driving the operation of the conveyor belt to ensure the uniform and stable transportation of materials in the dryer.
7. Bypass filtration system: During the drying process, it further filters and purifies the circulating air, improving the quality and drying effect of the air while protecting the internal components of the equipment from contamination.
8. Discharge system: located at the discharge end of the dryer, it discharges the dried and cooled Chinese herbal medicine slices out of the dryer, usually including a discharge port, a discharge device, etc. The design of the discharge port should ensure the smooth discharge of materials and avoid material accumulation; The unloading device can be manual or automatic, such as unloading valves, feeders, etc.
9. Exhaust and dehumidification system: used to discharge the exhaust gas and moisture generated during the drying process out of the dryer, maintaining stable humidity and air pressure inside the dryer. The exhaust system generally consists of exhaust fans, air ducts, and exhaust outlets, which discharge exhaust gases outdoors; The dehumidification system uses forced dehumidification to remove moisture and accelerate the drying process.
10. Control system: It is the command center of the entire dryer, usually using PLC and touch screen. Through the touch screen, the equipment can be operated, parameters can be set, detection parameters and equipment operation status can be displayed. The temperature control inside each unit box adopts proportional adjustment control method, with high control accuracy; The mesh belt transmission adopts frequency conversion speed regulation, which can adjust the mesh belt conveying speed and the fabric feeder conveying speed in linkage based on the moisture content of the material detected by the online moisture detector, achieving automatic control.
11. Cleaning system: The new type of traditional Chinese medicine decoction piece belt dryer is usually equipped with a cleaning system, such as a CIP online cleaning workstation, which consists of an acid tank, alkali tank, clean water tank, liquid supply main pipe, recovery main pipe, recovery tank, and nozzle. The drying chamber can be thoroughly cleaned to avoid cross contamination of different materials during drying, meeting the needs of drying multiple materials with one dryer.