When a known amount of solid particles behaves like fluid in the holding vessel it is referred as fluidized bed. This happens when a pressurized fluid is pumped all the way through the solid particulate medium. The normal fluids will behave in its own way and has its own and specific characteristics as a result. The fluid can flow very easily under the gravitational force or it can even be pumped with the aid of fluid technologies. This is referred as fluidization. The fluidized beds can be used for a variety of purposes for instance as a type of chemical reactors called fluidized bed reactor or fluidized bed combustion or as fluid catalytic cracking. It may be either by transfer of heat or mass or intense modification when a coating is over the solid particles. The first fluidized bed was designed by von Winkler in the ear 1922 for coal gasification process.
Properties of Fluidized Bed:
Types of Fluidized Bed:
Following are types of fluidized bed.
Based on the flow behavior they are classified as follows
Applications of Fluidized Bed: