What exactly is spray drying? How does a spray dryer work? Simply put, the spray drying process involves turning liquids into powders in various forms. Here we will discuss the basics of spray dryers.
Anatomy of a Spray Dryer
There are many different types of spray dryers, each with different characteristics to meet different spray drying needs. Spray dryers are used for food (e.g. starch, corn syrup, molasses, honey, dairy), chemicals, pharmaceuticals, and even unexpected food ingredients like seaweed.
The basic components of a spray dryer include:
*Feed pump
*Atomizer or nozzle
* Air heater, air diffuser
*Drying room
*Powder recovery system
*Process control system
Spray Drying Stage
The spray drying process starts with atomization. During atomization, a nozzle or rotary atomizer converts the liquid feedstock into small droplets. It is during this stage that many of the desired product qualities (ie particle size, viscosity) are developed.
Next is the drying process. After the droplets leave the nozzle or atomizer, they need to be dried to form a powder that is easy to package and transport. Drying of the powder is usually done using hot air heated by natural gas. The moisture of the powder is controlled by adjusting the hot air temperature.
Then comes the recovery process, which takes just a few seconds to recover the powder from the flue gas by means of a baghouse or cyclone.
We have spray drying equipment and expertise, and a strong commitment to quality. Therefore, consumers can buy spray dryers from our factory with confidence.
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