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 {HEAD ~ the channel} in {TAIL ~ order} to displace the combustion gases and provide a chemical reaction 
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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 { HEAD ~ the channel } in { TAIL ~ order } to displace the combustion gases and provide a chemical reaction
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