The hot gases required for drying are generated in the hot gas generator by firing fuel such as oil, natural gas, coal or any waste gas available in the plant. The hot gas is introduced in the Fluid Bed Dryer at the bottom of vibrating bed through a perforated plate. The coal is conveyed from feed end to discharge end by vibrations and comes in contact with hot gas resulting in drying the coal. The combined action of vibrations and fluidization ensures uniform drying and product moisture.

The exhaust gas from the dryer is passed through a bag filter for removing the fines carried over before releasing it to the atmosphere. It is also possible to re-circulate part of the flue gas from bag filter outlet to dryer. This minimizes chances of explosion by reducing oxygen content in flue gas and also provides heat recovery.