Wide Applications of Pharmaceutical Spray Dryer and its Principle of Working Spray drying is a process of rapid drying a liquid or slurry into a dry powder with a hot gas. Almost every sector uses spray dryers, including medicines, detergents, paint, pigments, food, dairy, mining and minerals. They can dry at speeds ranging from a few pounds to many tonnes per hour, although the higher rates are more expensive to run.
Construction Of Pharmaceuticals Spray Drying: The input material is atomized or sprayed into the drying chamber in tiny droplets in spray dryers. They are versatile continuous processing equipment. Traditional vertical arrangements are divided into two types based on how the feed is introduced. The first, tall-form dryers atomize the feed using nozzles. Due to the nozzle's narrow spray angle and the relative velocity of the droplets, they require a tall drying chamber with a tiny diameter to achieve drying.
The second group utilizes rotary disc atomizers or centrifugal atomizers to create the spray. The rotary atomizer spray angle is flat, necessitating a big diameter tower with a low height. Others include box spray dryers, which use the same principles but remove the product from the drier housing through a conveyor, and pulse-combustion spray dryers.
Spray dryers consist of a large round drying chamber and a tiny cone-shaped base made of stainfree steel, with a drying chamber size ranging from 2.5 to 9 meters and an elevation of 25 meters or more. The spray disc atomizer is approximately 300mm in diameter and rotates at a rate of 3,000 to 50,000 times per minute.
Spray drying is a one-step steady-state system process that uses fluid atomization to create droplets dried to precise pieces when moved to a heated drying form. A feed pump, atomizer, air heating unit, air dispenser, drying chamber, and systems for exhaust air purification and powder recovery/separator make up a spray dryer.