How does a spray dryer work?
December 29, 2021 03:56AM
Spray drying is a technique for quickly drying a liquid or slurry into a dry powder. Spray dryer suppliers favor this technique of drying to dry various heat-sensitive products, such as pharmaceuticals and foods, or things that require highly uniform, tiny particle size. The heated drying medium is air; however, if the liquid is a flammable solvent, such as oxygen-sensitive products or ethanol, nitrogen is used.

The solid solute or suspension is separated from the vaporized solvent using a spray dryer. Typically, the material is gathered in a drum or cyclone. Through a nozzle, the liquid input stream is sprayed into a heated vapor stream and evaporated. Solids develop as the liquid in the droplets evaporates fast. To maximize heat transmission and water vaporization, a nozzle is frequently employed to make the droplets as tiny as possible. Depending on the nozzle, droplet sizes can range from 20 to 180 m. There are two types of nozzles: two-fluid nozzles (generally air at 1 to 7 bars) (one fluid is the liquid to dry and the other is compressed gas) and high-pressure single-fluid nozzles (50 to 300 bars).

When compared to other drying technologies, spray dryers may dry a product quite quickly. They can also transform a solution (or slurry) to a dry powder in a single step, simplifying the process and boosting profit margins.

Amorphous Solid Dispensation is made by uniformly dispersing Active Pharmaceutical Ingredients into a polymer matrix using spray drying in pharmaceutical manufacture. This state enables the active compounds (drug) to have a higher amount of energy, which improves drug spice dispersion throughout the body of the patient. To know more about processing equipment, visit Alaqua today!
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