Periodic blowdown energy-saving emission-reducing device for steam boiler system

The utility model discloses an energy-saving and emission-reducing device for regular pollution discharge of a steam boiler system. The system comprises a boiler and a blowdown cooling pool, wherein the boiler is connected with a continuous blowdown pipeline, the bottom of the boiler is connected with a regular blowdown pipeline, the boiler is connected with a continuous blowdown flash tank through the continuous blowdown pipeline, the bottom of the continuous blowdown flash tank is connected with a first blowdown heat exchanger through a pipeline, and the top of the continuous blowdown flashtank is connected with a steam deaerator through a pipeline; the boiler is connected with a second blowdown heat exchanger through a regular blowdown pipeline; the periodic blowdown flash tank has theadvantages that the second blowdown heat exchanger is connected to the periodic blowdown pipeline, air pollution caused by steam emptying of an original periodic blowdown flash tank is effectively controlled, meanwhile, chemi