Fluidized bed dryer

In complement to standard static or vibrating fluidized beds, suitable to work up to 400°C, COMESSA designs also high temperature fluid beds up to 950°C. This batch fluidized bed is constituted by a metallic cylindrical reactor heated through the wall, allowing an internal controlled atmosphere, independent from heating load. The retort can be externally heated by radiation with electrical coils or by hot gases. The fluidization gas is homogeneously distributed by a special conical plate, allowing discharge of treated product through a central high temperature valve. Exhaust gases are cleaned by a filter made of sintered metal cartridges. Depending on the application and characteristics of the product, the filter can be externalized and an agitator can be added in the layer of product. Fluidization will generate an important stirring between gas and product and therefore a very homogeneous treatment. Precise temperature and process cycle can be fully automated. This kind of equipment is typically dedicated to the treatment of catalysts, even with particles below 30 microns. Direct heating or continuous processes can be alternatively proposed. ADVANTAGES OF THIS TECHNOLOGY Highly uniform product treatment Controlled atmosphere Accurate temperature control of reaction Possibility to add an agitator Possibility to have internal filtration