A process for salvaging otherwise waste product in a fluid bed dryer for drying a particulate product by passage of a current of air through a fluidizing chamber to fluidize the particulate product to be dried and contained therein underfluid bed drying conditions, which includes passing a rotating current of air through the fluidized bed to maintain a rotating wave form therein by a rotating air apertured distribution disc mounted below the fluid bed dryer adapted to interrupt a currentof air passing upwardly through said fluidizing chamber and a collector ring surrounding the periphery of said disc.
Fluid bed dryer is used for drying particulate material by passing streams of fluidizing gases through a bed of material in a so-called fluidizing chamber. Fluid bed dryer operation involves passing sufficient air or other fluid through thechamber to suspend solid particles in a stream of air. If each particle is bathed with a stream of air to produce the so-called "fluid bed", rapid drying throughout the entire mass is achieved.
of superheated steam drying oven of superheated steam drying technology is a new energy-saving drying method, which is the use of superheated steam direct contact with the wet material to remove moisture in a dry way. Thermal drying technology has the heat transfer coefficient, mass transfer resistance, high thermal efficiency, low energy consumption, use less steam, no danger of explosion and fire, etc., help protect the environment, with sterilization effect. However, there are certain superheated steam mesh belt dryer range of applications, such drying method is not appropriate for drying heat-sensitive materials, if the recovery will be detrimental to the energy savings, greatly affecting the other, the cost is relatively high. In the feed industry, superheated steam drying technology can be applied to grains, grasses, fish bones and fish and so on.