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15051989720
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Sanhekou Industrial Park, Zhenglu Town, Changzhou
Changzhou Xianzhu Drying Equipment Co., Ltd
Working principle and characteristics of rotary flash dryer
Date: 2025-02-12Read: 4
The working principle of the rotary flash dryer is that hot air enters the main tower of the flash dryer tangentially from the bottom air inlet of the main engine, forming a spiral upward high-speed rotating airflow inside the main tower of the flash dryer. At the same time, the size of the bottom annular gap is adjusted according to the properties of different materials to maintain the appropriate wind speed. The material is directly fed into the flash drying tower through a spiral feeder, and under the impact and driving of high-speed airflow, it quickly disperses and rotates at high speed with the airflow. For relatively large and humid particle clusters, high-speed airflow is not enough to break them and rotate them at high speed, so they gradually fall under the action of gravity. When they fall to the bottom of the host, they are forcibly broken and micronized by the crushing device set at the bottom, and then rotate and rise together with the high-speed airflow to complete the drying process. In order to achieve a low final moisture content of the material without being affected by fluctuations in initial moisture and affecting product quality, multiple layers of swirling blades are installed in the drying tower to form a relatively stable fluidized bed. At the same time, the swirling blades also play a role in ensuring the necessary residence time and classification for drying.
The rotary flash dryer mainly has the following characteristics:
1. The use of dual channel tangential air intake avoids the velocity non-uniformity of the rotating field in the radial flow field.
2. Effectively control the final moisture content and fineness by coordinating and unifying the swirl blades and inlet air velocity.
3. The rotating blade has a special arrangement structure, characterized by low wear, wide contact surface, and high cutting force.
4. Skilled in handling heat sensitive materials, the bottom of the host belongs to the high-temperature zone, where the gas velocity is high and there is a cooling water protection device to avoid the possibility of material coking and discoloration.
5. Low system resistance, high thermal efficiency, good operating environment, and low labor intensity.
6. The host adopts a new sealing structure, which extends the service life of the host bearings and the bearing seat is equipped with a water isolation sleeve circulation cooling device.
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