What is the dryer?
Spray dryer is a device used to make dry, powdered substances from fluid suspension or sludge by revealing the spray current of the hot gas suspension. It is a simple system of evaporation of one step that has minimal moving parts and fast drying time. Drying processes use different nozzles, gases, spray and gas flow formulas depending on the type of solid substances and the required consistency of the finished product. This method of fluid removal exposes a minimum heat suspension and is a preferred drying method for many foods and pharmaceutical products.
substances to be dried are mixed with water, and then under pressure into the nozzle system, which elaborates into droplets of the controlled size, and passes through the flow of heated gas. This fine spray allows the liquid part of the suspension to evaporate very quickly, so the granules of dried solids leave the collection. Spray dryer generally uses heated air as a drying medium in cases HORating soluts such as ethanol and solids that are sensitive to oxygen exposure can be used nitrogen. This flow of heated gas can be applied towards the sludge spray or against how long the solids should be exposed to the drying process.
The spray dryer nozzles are designed to produce a controlled constant droplet size that produces dried solids that are uniform and often freely flowing. This high level of particle size consistency is essential for successful production of many products such as chemical catalysts. The size of the droplets usually range from 100 to 200 microns, but the use of specialized nozzles, such as ultrasound variants, can produce finer sprays with 10 microns droplets. These specialized nozzles are generally used when a system of two fluids is used and an extremely fine finished product is required.
S. Modejička is particularly well suited for the food and pharmaceutical industry due to the short participating times of heating. Food products such as milk powder, tea, spices and medicines such as antibiotics will be degraded if they are exposed to excessive heat spray for an attractive option. Products can also be mixed with encapsulation in the porridge stage, adding another system value. The process increases productivity and reduces operating costs that make the products dried sprays more profitable.