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China Aerospace Manufacturing Technology Research Institute
Core structural characteristics and application description of boiling dryer
Date: 2025-10-31Read: 9
Boiling dryer is a device that uses "hot air flow to make materials fluidized" to achieve drying. The core uses hot air to fully contact with material particles and quickly remove moisture, adapting to particles or powder materials that require efficient and uniform drying. Its drying process does not require mechanical stirring, which can reduce material damage, and the drying rate can be adjusted by controlling the airflow parameters to avoid material overheating and deterioration. It is a commonly used equipment that balances efficiency and material protection, and widely serves the drying needs of multiple industries.
1、 Core structural characteristics of boiling dryer
The structural design of the boiling dryer revolves around "fluidized drying", "easy operation", and "stable operation", with the following core features:
1Drying host and airflow system: ensuring drying efficiency and uniformity
The host includes a fluidized bed, a hot air chamber, and an exhaust chamber. The airflow distribution plate at the bottom of the fluidized bed can evenly distribute hot air, causing the material to form a "boiling" state and increasing the heat exchange area; The hot air system includes a heater and a filter. The heater can heat the air to the set temperature, and the filter removes impurities to avoid contaminating materials; The exhaust system is equipped with a cyclone separator or bag filter to recycle small materials and reduce waste, while purifying the exhaust air to meet environmental requirements.
2Control and auxiliary structure: improve operational convenience and safety
Equipped with temperature, air volume, and air pressure monitoring instruments, operators can grasp parameters in real time, adjust hot air temperature and airflow speed according to material moisture, and ensure stable drying effect; Some models support automated control and can preset programs to reduce manual intervention; The auxiliary structure includes sealed feed inlet, continuous or intermittent discharge outlet, as well as safety devices such as over temperature alarm and abnormal wind pressure shutdown, to ensure operational safety and production continuity.
2、 The main application scenarios of boiling dryer
Based on structural characteristics and drying capacity, the boiling dryer is suitable for the drying needs of particles and powders in multiple fields. The core application scenarios are as follows:
1Pharmaceutical industry: drying of pharmaceutical granules and powders
Used for drying traditional Chinese medicine granules and Western medicine raw material powders, fluidized drying ensures uniform heating of materials and avoids local overheating that can damage effective ingredients; The contact parts between equipment and materials are mostly made of stainless steel, with smooth inner walls that are easy to clean and disinfect, meeting the "material purity" and "hygiene standards" of the pharmaceutical industry, and adapting to the compliance requirements of drug production.
2Food industry: drying of food raw materials and finished products
Suitable for drying food granules and food additive powders, with sufficient contact between hot air flow and materials to quickly remove water, shorten the cycle and reduce adhesion and agglomeration, ensuring material looseness and taste; By controlling the temperature to prevent nutrient loss, it meets the requirements of the food industry for "nutrient retention" and "quality stability".
3Chemical industry: Drying of chemical raw materials
Used for drying chemical particle raw materials and chemical powders, the equipment's temperature resistance and corrosion resistance can be adapted to the characteristics of some chemical materials; Fluidized drying ensures uniform moisture content of materials, meets the humidity requirements for subsequent processing, and reduces dust spillage, thereby minimizing the impact on the operating environment.