utilizing a flow measuring device located in the proximity of the gas inlet of the cooling means to assist in calculating either or {TAIL ~ both} of {HEAD ~ water spray requirements} or sorbent concentration based on gas volume as a feed forward control 
utilizing a flow measuring device located in the proximity of the gas inlet of the cooling means to assist in calculating either or { TAIL ~ both } of { HEAD ~ water spray requirements } or sorbent concentration based on gas volume as a feed forward control
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