What is a spray dryer and its two major types

- May 20, 2019-

Spray dryer, which is a specific type of dryer, also requires a comprehensive understanding and in-depth understanding, because it has a wide range of applications and can have a good drying effect. Moreover, after reaching this level, the product can be used correctly and reasonably to achieve full utilization of the dryer.


Spray dryer, what is it specifically? The professional answer to this question is:

Spray dryer, which is a drying device that can simultaneously perform drying and granulation operations, which can adjust the pressure, flow rate and orifice size of the feed pump according to the process requirements to obtain spherical particles of the desired size, and To achieve the purpose of drying. This drying equipment can be used to dry heat sensitive materials such as common liquids, suspensions and viscous liquids, as well as dry fuels, intermediates, soap powders and inorganic salts.


One of the specific types of spray dryer: centrifugal spray dryer

Centrifugal spray dryer, which can dry solutions, emulsions, suspensions and paste liquids to obtain powdery or granular solids. Therefore, if the finished particle size distribution, residual moisture content, bulk density and particle shape meet the standard requirements Spray drying is a very suitable drying process.


The performance characteristics of the centrifugal spray are as follows: the drying speed is fast, the instantaneous drying can be carried out, and at the same time, 95% to 98% of the moisture in the material is evaporated, and the heat sensitive material is very suitable. The finished product obtained after drying has excellent uniformity, fluidity and solubility, and the finished product has high purity and good quality. In addition, the production process can be simplified, the operation control is convenient and simple, and the material having a water content of 40% to 60% can be once dried into powdery particles, and the water content of the special material can be 90%.


Spray dryer special type 2: pressure spray dryer

Pressure spray dryer, which is a common and common type of spray dryer, its working principle is: the feed liquid passes through the high pressure input of the diaphragm pump and then sprays the mist droplets, and then flows down with the hot air and simultaneously dries. The powder obtained after drying is collected through the bottom discharge port, and the generated exhaust gas and fine powder are separated by a cyclone, the exhaust gas is discharged by a fan, and the fine powder is collected by a pollinator. In addition, a dust removal device can be installed at the fan outlet, so that the recovery rate can reach more than 98%.www.srchemicalequipment.com