Circulating fluidized bed boiler system capable of burning stone coal

The utility model discloses a circulating fluidized bed boiler system capable of burning stone coal, which comprises a stone coal preparing and feeding system, a circulating fluidized bed boiler body, a circulating ash discharge cooler, a slag cooler, an ash and slag conveying system and an air feeder. The stone coal preparing and feeding system and the air feeder are respectively connected with the circulating fluidized bed boiler body and are used for feeding coal and air to the inside of the circulating fluidized bed boiler body, and the circulating ash discharge cooler and the slag cooler are respectively connected to the bottom of the circulating fluidized bed boiler body and are further connected with the ash and slag conveying system. The circulating fluidized bed boiler system greatly increases arrangement flexibility and operation reliability, and simultaneously reduces power consumption of an auxiliary engine of a CFB (circulating fluidized bed) boiler.