CFB (circulating fluidized bed) boiler

The utility model provides a CFB (circulating fluidized bed) boiler which comprises a cyclone separator, an economizer arranged in a flue at an outlet of the cyclone separator and a flow equalization plate, wherein the flow equalization plate is arranged in the flue and located between the outlet of the cyclone separator and a windward side of the economizer, a first preset distance is formed between the flow equalization plate and the windward side of the economizer, and multiple flow guide holes allowing flue gas exhausted from the outlet of the cyclone separator are formed in the flow equalization plate. Rotating drift current of the flue gas exhausted from the outlet of the cyclone separator is eliminated by the flow equalization plate, the flue gas is sufficiently mixed in the flue and enters the economizer uniformly, and localized wear of the economizer due to centralized washing out can be reduced; meanwhile, the flow equalization plate can block dust particles of the flue gas in the flue, and wear of the economizer is further reduced; therefore, the wear degree of the economizer can be reduced, wear leakage or tube explosion of the economizer are reduced, further, the service life of the boiler is prolonged, the operating security, economic efficiency and stability of the boiler are guaranteed.