The spray drying process is recommended when a low bulk density powder detergent is required.
The basic process is the spraying, from the top of a tower, of a thick composite liquid, called "slurry", containing sulphonic acid, as active matter of the detergent, sodium carbonate, sodium sulphate, sodium silicate, other salts and water.
During their falling from the top of the tower the droplets come in contact with a stream of hot air.
Some of the water used to prepare the "slurry" is adsorbed as cristallisation water by the salts and some is evaporated. The result of this process is a product with the apparence of granules but formed by small hollow hard shells called "beads".
The "bead" is the typical appearence of a powder detergent manufactured by the spray drying process.
The thin shell of the beads makes the powder detergent easily soluble during the washing process.
The Spray Drying Plant includes:
PRODUCTION RATE
MECCANICHE MODERNE supplies Spray Drying Plants from 1000 to 10000 kg/hour production rate.
FLOW SHEETS
The following pages show the Flow Sheets of a typical Spray Drying Plant:
