Multi Stage Spray Dryer

The working principle of multi stage spray dryer mainly includes the following steps

Firstly, the raw material liquid is fed into the drying tower through the feeding device;

Then, the raw material liquid is dispersed into fine droplets through the centrifugal nozzle;

Secondly, these droplets are fully contacted with the hot air inside the drying tower to complete the exchange of heat and mass and realise the drying of the materials;

Finally, the dried materials are collected and discharged through the cyclone separator.

In addition, in order to improve the drying efficiency and product quality, the modern centrifugal spray dryer also adopts a variety of technical improvements, such as the use of double grille air device and rotating air device to improve the heat and mass transfer in the drying tower, as well as the use of magnets to remove impurities in the material, such as iron filings.

Multi stage spray dryer whose main feature is to use the centrifugal force of high-speed rotation to disperse the material liquid into fine droplets and dry them in the hot air, so as to complete the drying process of the material quickly and efficiently. The core component of this equipment is the centrifugal nozzle, whose rotational speed, vibration size and stability directly affect the atomisation effect and the quality of the dried material. The design and application of centrifugal spray dryer has gone through many years of development, from the initial air-actuated or belt-and-gear speed-increasing spray head to the later electric high-speed centrifugal spray dryer, to the centrifugal pressure nozzle with large orifice, as well as the improved centrifugal spray dryer, including air filters, air heaters, hot air distributor and so on.

The multi stage spray dryer has the ability to process high viscosity, pasty and liquids containing suspended matter without clogging, with high productivity and relatively low energy consumption. In addition, the equipment also has good applicability and flexibility, and can be adjusted and optimised according to different material characteristics and production needs. With the continuous progress and innovation of technology, centrifugal spray dryer also shows great potential and value in improving energy efficiency, reducing operating costs, reducing environmental pollution, etc.

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