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The basic principle of spray dryer
Apr 13, 2018

Spray drying is a method of using atomizer to disperse the raw material liquid into droplets and obtain the product with hot gas. The spray drying machine can be divided into three types according to the atomization of raw materials:

1. The air flow type atomizer USES compressed air to spew from the nozzle at a high speed (greater than 300 m/s), depending on the friction caused by the difference between the two phases of the gas liquid, and the liquid is divided into fog drops.

2. Pressure atomizer USES high pressure pump to get the liquid to obtain high pressure. When the high-pressure liquid passes through the nozzle, the pressure can be turned into kinetic energy and the high velocity is dispersed as fog drops.

3. The rotary centrifugal atomizer is atomized by centrifugal force in the high-speed rotating disk (90~160 M/S) from the edge of the disk.

The dryer is the equipment to remove the moisture from the container by pumping the air inside the container to the desired vacuum. Dry work, tank in the vacuum state, jacketed through hot water or steam, thermal oil heating, with low speed rotation of tank, the material of the tank is up and down, inside and outside the "diamond track" movement and absorb the evaporation, about "June 1" children's day "what children want gift" network study, the intelligent technology products, such as the iPhone apple's "top". As more and more electronic products expand sales channels to the "iPad generation", the water vapor is continuously discharged through the vacuum tube road to achieve the purpose of material drying.

At the same time of drying mixture, it can realize multi-function operation according to customer's requirement of spraying, filtering and crushing. The low temperature continuous vacuum drying machine is especially suitable for high viscosity, high fat and high carbohydrate, etc., which is difficult to solve in spray drying and vacuum oven. And it can maintain the stability and consistency of product batch.

Polymerization acetone special dryer set up to stir, so that the smooth paste, paste, paste material drying. The polymer-acetone dryer is used to remove the moisture from the container after the air inside the container has reached the desired vacuum.

A variety of feeding devices are available for selection, and the feeding is continuously stable. There is no bridging phenomenon in the process. Special cooling device is set at the bottom of the dryer to avoid the deterioration of the material in the high temperature area at the bottom. Special air pressure sealing device and bearing cooling device effectively extend the service life of the transmission part. The special air separation device reduces the resistance of the equipment and effectively provides the air handling capacity of the dryer. The drying chamber is equipped with graded rings and swirls, and the material fineness and final moisture can be adjusted. (for example, the total moisture of calcium carbonate can be adjusted to less than 0.1%). Compared with other drying methods, the proportion of materials can be increased effectively. The dry indoor air speed is high and the material stay is short, which can effectively prevent the material from sticking to the wall and the heat sensitive material, so as to achieve high efficiency, fast, small equipment and large production.


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    Tel: +86-21-60913363
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