High-speed centrifugal spray dryer is the most widely used process in the liquid process forming and drying industry. Most suitable for producing powdery and granular solid products from solutions, emulsions, suspensions and paste liquid raw materials. Therefore, spray drying is an ideal process when the final particle size distribution, residual moisture content, bulk density and particle shape must meet precise standards. Spray dryer is a drying equipment for processing solution, suspension or slurry materials. The basic process is that the material liquid passes through the atomizer to form mist droplets dispersed in the hot air flow. The air is sent to the air heater for preheating through the blower, and then enters the spray dryer to be dried in contact with the mist droplets. Part of the product falls into the bottom of the tower and is separated from the gas, while the other part is sucked into the cyclone separator by the induced draft fan and the tail gas is emptied after separation. The airflow spray dryer is named after the use of an airflow atomizer. The working principle of an airflow atomizer is to use high-speed airflow to split the liquid film. High-speed air flow uses compressed air. The flow rate of the feed liquid is very low. When the compressed air is ejected from the atomizer at a high annular velocity, there is a large speed difference between the two, causing friction and shearing forces between the gas and liquid. The liquid is pulled into long and thin filaments in an instant, and these liquid filaments break quickly at the thinner parts to form tiny droplets. The centrifugal spray dryer mainly uses the high-speed rotation force of the rotary atomizer to throw out the mist droplets, which are also dried by hot air and become powder or particles. This spray dryer is a dual-purpose centrifugal and airflow type. When the experiment requires powder, the airflow type is used. The airflow type has a long service life and is not easy to damage. At the same time, this is also the shortcoming of the centrifugal atomizer. When the experiment requires uniform powder or particles Choose centrifugal atomization system for spray drying.
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