Armfield - Miniature-Scale Research & Development Technology - FT80/FT81 Tall Form Spray Dryer and Tall Form Spray Chiller

An optional accessory is available to provide final cooling of the spray dried powder in a fluidised bed. This feature is particularly useful when drying powders containing fats as the fluid bed helps to crystallise the fat content. Typical applications include infant formulas and whole milk powders.

The Bag Filter accessory is used on the exhaust air outlet. The five micron filter removes virtually all of the remaining product dust in the airstream, resulting in clean air that can then be discharged directly into the working area, without requiring further treatment, ducting or extraction fans. (This filter is not designed to extract toxic or hazardous materials.)

The trace heating accessory is required when the product must be kept above a certain minimum temperature prior to atomisation in the spray nozzle.

It comprises a heater band on the feed vessel, a heater on the pump body and a further heater on each of the spray nozzles. The trace heating controls are enclosed in a separate mains powered stainless steel box, which can be positioned on the main control unit. Two independent temperature controllers are used for the feed vessel wall temperature and the nozzle body temperature. Although primarily required for spray chilling, this accessory can also be used with the spray drier.

Note: The trace heating is not designed to heat the product, but to maintain the product at an elevated temperature.