Denitration system of circulating fluidized bed boiler

The embodiment of the invention discloses a denitration system of the circulating fluidized bed boiler, wherein the denitration system comprises a denitration agent feeding device, a denitration agent conveying pipeline, a primary air feeder and a platen superheater arranged in a boiler hearth, wherein the primary air feeder is used for providing hot primary air, and an air outlet of the primary air feeder is connected with the denitration agent conveying pipeline; an outlet of a pipeline section, in the boiler hearth, of the denitration agent conveying pipeline is located at a corner of a horizontal section tube panel of the platen superheater, and the denitration agent feeding device is connected with the denitration agent conveying pipeline. Low-load peak regulation of a circulating fluidized bed boiler unit can be realized. 本申请实施例公开了一种循环硫化床锅炉的脱硝系统包含：脱硝剂给料装置，脱硝剂输送管路，一次送风机和设置于锅炉炉膛内的屏式过热器，其中，所述一次送风机用于提供热一次风，所述一次送风机的出风口与所述脱硝剂输送管路连接，所述脱硝剂输送管路在所述锅炉炉膛内的管路段的出口位于所述屏式过热器水平段管屏的转角处，所述脱硝剂给料装置与所述脱硝剂输送管路连接。能够实现循环硫化床锅炉机组