Lime kiln flue gas waste heat recycling system

The invention discloses a lime kiln flue gas waste heat recycling system, which belongs to the field of energy recovery, and comprises a soft water preparation unit, a heat exchange preheating unit and a steam generation unit which are connected in sequence, the soft water preparation unit comprises a raw water tank, soft water preparation equipment and a soft water tank which are connected in sequence; the heat exchange preheating unit comprises a heat exchanger and a waste heat boiler, and the heat exchanger is arranged in a kiln tail high-temperature flue gas pipeline; and the steam generation unit comprises an evaporator, a superheater and a steam outlet which are connected in sequence. Compared with the prior art, the method has the characteristics of energy conservation, cost reduction and efficiency improvement. 本发明公开了一种石灰窑烟气余热回收利用系统，属于能源回收领域，包括顺序相连的软水制备单元、换热预热单元和蒸汽生成单元；所述软水制备单元包括顺序连接的原水罐、软水制备设备和软水罐；所述换热预热单元包括换热器和余热锅炉，所述换热器设置在窑尾高温烟气管道内；所述蒸汽生成单元包括顺序连接的蒸发器、过热器和蒸汽出口。与现有技术相比较具有节约能源，降本增效的特点。