Flue gas cooling, energy-saving and carbon-reducing device

The utility model discloses a flue gas cooling, energy-saving and carbon-reducing device. The device comprises a water mist spraying box, a cooling box and a water tank, a smoke outlet and a smoke inlet are formed in the upper side and the lower side of the water mist spraying box respectively, a water spraying pipe frame is arranged in the water mist spraying box, a plurality of water mist nozzles are arranged on the water spraying pipe frame, an air inlet and an air outlet are formed in the cooling box, and the air inlet is connected with a cooling fan. An evaporator and a heat exchanger are sequentially arranged between the air inlet and the air outlet, the evaporator is connected with an inlet of the compressor and the expansion valve, the expansion valve and an outlet of the compressor are connected with the condenser, and the water spraying pipe frame is connected with the heat exchanger which is connected with the water tank through a water pump. According to the utility model, the temperature of water