The invention discloses an
internal heating type dryer for in-furnace coking
coal dehumidification, which comprises a dryer outer frame, a
drying area on the upper portion in the dryer outer frame, a
fluidized bed drying heating area under the
drying area and an air distribution area on the lower portion in the dryer outer frame. The drying area is provided with an exhaust space (10) and a heat exchange face, a coil
heat exchanger (11) is arranged in the
fluidized bed drying heating area, a fluidized
air chamber (9), an air distribution plate (8) and a hood (12) are arranged in the air distribution area, and the air distribution plate (8) and the hood (12) form a module structure connected with the fluidized
air chamber (9). The
internal heating type dryer is simple in structure, good in exchangeability, convenient to overhaul, reliable in operation and reliable and flexible in dehumidification control adjustment, saves energy, is simple in
system adjustment and responses quickly to heat adjustment of the
heat exchanger. A large drying
system can be formed by a plurality of dryers according to the production requirement, and only one
backup module is needed to ensure normal production of a humidifying
system, so that scale of spare equipment of the existing humidifying system is reduced.