• Acmefil Engineering Systems Private Limited

Spray Drier

Acmefil Engineering Systems offers a Spray Drier, a process involving conversion of fluid into fine droplets and exposing them to a hot drying media, so as to achieve defined dry particulate matter. Spray drying involves steps like: 1. Atomisation – conversion of the feed into fine droplets achieved by either pumping the feed under high pressure through an orifice or by spraying through a high speed rotating perforated disc; 2. Hot air mixing – air, which is, normally the drying media used, is heated to a predefined temperature depending upon the characteristics of the feed fluid and dried product by either an indirect hot air generator or a direct hot air generator; this hot air is brought in contact with the spray droplets through co-current or counter-current method. The thermal energy of the hot air is used for evaporation and the cooled air pneumatically conveys the dried particles in the system. The contact time of the hot air and the spray droplets is only a few seconds, during which drying is achieved and the air temperature drops instantaneously. The dried particle never reaches the drying air temperature. This enables efficient drying of heat sensitive materials without thermal decomposition. 3. Powder separation: dried powder is discharged continuously from the bottom of the drying chamber through rotary valve and the air containing fines is taken to either a cyclone separator or passed through a textile fabric bag filter to recover the fines. The air is further scrubbed in a high efficiency venturi scrubber before being exhausted out to the atmosphere. Special powder handling systems are used for industrial applications to either cool the dried powder or toe pneumatically convey the same to a product silo. These systems are tailor designed to suit the specific requirements and layouts. Spray drier is an ideal choice as it offers defined end product characteristics in terms of particle size, moisture content, bulk density and particle shape.