Application: Test work to obtain operational data and basis for design of industrial-sized FMD dryers. The plant is mainly for food and dairy products.
Capacity: The evaporative capacity is 15-35 kg/h with a corresponding minimum feed requirement.
Specification: The chamber diameter is 1.2 m at the top and the height is 3.2 m. The chamber is equipped with a safety vent. A moving woven belt is below the chamber, where semi-dried product is accumulated as an agglomerated (a few millimetres), thick porous powder layer. This layer is subsequently conveyed through post-drying and cooling sections.
Electrical heaters warm 630 kg/h of primary air (to a maximum of 350 ° C) and up to 600 kg/h of post-drying air (maximum 150 °C).
The feed is supplied by a Mono pump, with the option of a piston pump placed just after the Mono pump for pressure nozzle atomization and/or homogenization (maximum pressure of 250 bar).
Two-fluid atomization is also available. Various atomization aids are available, such as high/low pressure air/gas injection, as well as a powder recirculation system. As an option, the chamber can be equipped with a jet air wall sweep system.
The spray dryer is equipped with a 'clean-in-place' (CIP) system for final wet cleaning.
The FILTERMAT™ is especially capable of completion of drying where the powder has to be processed at close to critical conditions for a long time – the FILTERMAT™ dryer producing coarse or very coarse, agglomerated or granulated free-flowing dustless powders.
The conventional spray dryer layout can handle drying at a certain temperature; any drying at a lower temperature requires a FILTERMAT™ dryer. For example, the drying of hygroscopic, thermoplastic and slowly crystallising products involves handling of very sticky intermediate materials at a lower temperature level than that possible in conventional spray dryer layouts.