Classification of drying equipment

There are various types of drying equipment, and drying equipment can be classified into different categories based on different operating pressures, operating methods, heat transfer principles, heating methods, and structures. According to operating pressure, it can be divided into two types: atmospheric pressure type and vacuum type; According to the operation mode, it can be divided into two types: intermittent operation and continuous operation; According to the principle of heat transfer, it can be divided into several types: conduction heating, convection heating, radiation heat transfer, and high-frequency heating; According to the heating method, it can be divided into two types: direct heating and indirect heating; According to the structure, it can be divided into spray dryer, fluidized bed dryer, airflow dryer, paddle dryer, box dryer and rotary flash dryer.