(1) Biomass-fired CFB biomass boilers should be equipped with a primary fan with a flow margin of not less than 15% and an outlet pressure margin of not less than 20%.

(2) Each biomass boiler is equipped with a secondary fan, the flow margin is not less than 15%, and the outlet pressure margin is not less than 20%.

(3) Each biomass boiler of 65t/h and below is equipped with 1 induced draft fan, and each boiler of 130t/h and above is equipped with 2 induced draft fans, the flow margin is not less than 20%, and the outlet pressure margin is not less than 25%.

(4) It is recommended that both the primary and secondary fans and induced draft fans adopt centrifugal fans, and the primary fan of the CFB boiler should be driven by a fixed-speed motor, and the secondary fans and induced draft fans should be adjusted by frequency conversion motors or hydraulic couplings.