MULTIPLE STAGE SPRAY DRYER

 

If the desired powder specifications are not achieved in a single stage spray drying, multi stage operations are necessary. Fluid bed assemblies act as the second and/or third stages to conduct product agglomeration and/or further conditioning of the product.

 

TWO-STAGE ASSEMBLY

In the conventional two-stage processing, vibrating fluid beds are installed outside of the drying chamber and act as the second-stage.

 

THREE-STAGE ASSEMBLY

In the modern three-stage processing, the drying chamber has an integrated fluid bed as a second-stage. The third stage is an externally mounted vibrating fluid bed.

 

Multi-stage drying gives the possibilities of product agglomeration, better control over residual moisture of the powder and improved thermal efficiency.