Smoke exhaust waste heat deep utilization system of circulating fluidized bed boiler

The utility model discloses a circulating fluidized bed boiler exhaust smoke waste heat deep utilization system which comprises a boiler, a first-stage smoke cooler, a second-stage smoke cooler, a dust remover, an induced draft fan and a third-stage smoke cooler which are connected in sequence. Flue gas exhausted by a boiler sequentially passes through the first-stage flue gas cooler, the second-stage flue gas cooler, the dust remover, the induced draft fan and the third-stage flue gas cooler. The first-stage flue gas cooler, the second-stage flue gas cooler and the third-stage flue gas cooler are used for reducing the temperature of the flue gas stage by stage, and the flue gas cooling device has the advantages of being high in heat exchange temperature difference and large in recycled heat quantity by utilizing the three-stage flue gas coolers to reduce the temperature of the flue gas stage by stage. 本实用新型公开了一种循环流化床锅炉排烟余热深度利用系统，包括依次相连的锅炉、第一级烟气冷却器、第二级烟气冷却器、除尘器、引风机和第三级烟气冷却器，其中锅炉排出的烟气依次经过第一级烟气冷却器、第二级烟气冷却器、除尘器、