Desain of Screw Conveyor Dryer for Coal Drying
Indonesia is one of the largest coal producer in the world. However, most of Indonesia's coal is low grade coal (less than 5000 calories/kg). Therefore, the quality of coal needs to be improved. One of many ways to improve the quality of coal is drying. In this thesis, designed screw conveyo...
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| Format: | Final Project |
| Language: | Indonesia |
| Online Access: | https://digilib.itb.ac.id/gdl/view/40796 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | Indonesia is one of the largest coal producer in the world. However, most of
Indonesia's coal is low grade coal (less than 5000 calories/kg). Therefore, the quality
of coal needs to be improved. One of many ways to improve the quality of coal is
drying. In this thesis, designed screw conveyor dryer for drying low rank coal.
Screw conveyor dryer is designed for lignite coals, with the final target moisture
content in coal by 10%.
Screw conveyor dryer is designed with two modes of drying which are indirect
drying and direct drying. There is also modification of screw conveyor flight so that
there are lift anf fall effect in the screw conveyor. This effect will increase the heat
and mass transfer processes.
The design of the main dimensions of screw conveyor dryer is based on CEMC
(Conveyor Engineering and Manufacturing Corporation) catalogue. The results
obtained are 2.39 m long screw conveyor, with a screw diameter of 0.14 m, a pitch
distance of 0.095 m, and a 161 watt motor power.
Heat required for drying is calculated based on the energy balance and the
results obtained is 253050.04 kJ / hour. |
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