The Rotary Kiln Furnace are used for incineration of
combustible industrial wastes, especially wastes which contains high
percentage of plastic wastes, on a stable basis, reducing the volume of
wastes and rendering them harmless. Rotary kiln furnaces can be used for
multiple jobs. With power rating of 500 KW the rotary kiln has been used
for the gasification and pyrolysis of sewerage sludge.
These kilns are applied mainly in continuous processes, including
cement manufacturing and the drying of granular materials. The rotary
kilns consist of long tubes lying almost horizontally that are rotated
slowly as heat is applied to the material being treated inside the
tubes. The fuel used may be electricity, oil, gas, or coal. The
temperature of firing and the length of time required depend on the
design of the kiln and the type of material being fired.
Using rotary kilns, the waste is effectively reduced. solid wastes too
are treated using rotary kiln furnace and feeder. The waste materials
are transferred to the other side by the rotation and incline of the
rotary kiln furnace. The process results in the decomposition of wastes
by the heat radiation from after combustion chamber. The residual of
this pyrolysis process are burned on the stokers, which are installed at
the end of the rotary kiln furnace. And thermal decomposed gas is
suitably incinerated in the after combustion chamber by using the multi
stage combustion technologies.
For both low and high viscosity liquid wastes these rotary kilns are
useful. The low viscosity liquid wastes are injected into the after
combustion chamber to evaporate the water and burn the volatile matters.
Whereas the high viscosity liquid wastes, are fed into the rotary kiln
furnace with other solid wastes.
Features
Following are the features of rotary kiln furnace:
- It results in the gasification of solid wastes with the minimum
emission of harmful gas.
- The rotary kiln furnace render it unnecessary for the preparation
of various pretreatment facilities.
- The non metallic materials used inside the area of the rotary
kiln furnace, hence it is possible to prevent from the melting
troubles as stoker.
- The industrial rotary kiln furnace can be used for the treatment
of various wastes as solid, liquid and gas condition.
- It is easy to control the load fluctuation for suitable operation
because the rotary kiln furnace have a long retention time.
