The GEA Niro COMPACT DRYER™ was first developed to improve the drying economy and keep the spray dryer running for a longer time between cleaning. By cutting the lower part of the drying chamber cone - compared to a conventional type of spray dryer - off and replacing it with an annular ring-formed plug-flow fluid bed a lot of advantages are achieved:
- The moisture content in the powder from the chamber can be as high as 8-10 %, which means that the dryer efficiency is improved significantly as less drying air is needed per kilo of powder
- The powder discharge point from the integrated fluid bed into the VIBRO-FLUIDIZER™ is situated higher than in the conventional spray drying plant whereby the total height of the plant is therefore reduced.
- There are no horizontal exhaust air ducts inside the chamber, where powder deposits can occur
All flowsheets are available for download in the Animation Download area.
The COMPACT DRYER™ can be equipped with a rotary atomizer and/or nozzles, adding to the flexibility. The exhaust air from the chamber, the ring-formed fluid bed and the VIBRO-FLUIDIZER™ is passed through cyclones and/or bag filters . All powder particles separated from the air are returned to the VIBRO-FLUIDIZER™ for regular powders, or to the specially designed "FRAD" fines return unit for production of agglomerated powders.
The plant can be designed and delivered for a full manual and/or automatic CIP Cleaning In Place including CIP Kitchen with tanks, pumps, valves and instrumentation.
The COMPACT DRYER™ forms the key element in a complete process line for food and dairy powders.
All plants designed and supplied by GEA Process Engineering will enable the end user to obtain approvals put forward by the EU directive.