Traditionally to unclog the raw-coal in the bunker, the operator uses many ways, including hammering the bunker outlet. However, this traditional method required a lot of manpower and distract the focus of the operator only to the clogging.

There are many types anti clogging available in the market, such as Vibrator, Air Cannon and Pick Front, each technology has advantage and disadvantages. However for common issue in coal clogging, the best solution is Rotary anti Blocking. Unless due to technical condition Rotary anti blocking cannot be installed, than other technology can be used for consideration.