The separated solid material is recirculated to the fluidized bed through a channel, and a gaseous medium is supplied in a controlled manner to the separated solid material present in the channel in {HEAD ~ order} to displace {TAIL ~ the combustion gases} and provide a chemical reaction 
to displace
The separated solid material is recirculated to the fluidized bed through a channel , and a gaseous medium is supplied in a controlled manner to the separated solid material present in the channel in { HEAD ~ order } to displace { TAIL ~ the combustion gases } and provide a chemical reaction
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