6.2.2 Causes:6.2.2.1 The boiler’s fire is off or there is negative pressure fluctuation.6.2.2.2 The regulation of booster fan is out of order.6.2.2.3 There is mis-operation of FGD bypass damper as well as inlet and outlet flue gasdampers.6.2.2.4 There is fault in the measuring point of raw gas pressure of FGD
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