Chimney outlet flue gas dehumidification device of gas-fired hot water boiler

The utility model provides a gas-fired hot water boiler chimney outlet flue gas dehumidification device which comprises a bottom plate and a hot water boiler, fixing plates are fixedly connected to the two sides of the top of the bottom plate, and a top plate is fixedly connected between the tops of the two fixing plates. The hot water boiler is fixedly connected to the top of the bottom plate and located between the opposite sides of the two fixing plates, an exhaust port in the right side of the top of the hot water boiler communicates with an exhaust pipe, one end of the exhaust pipe communicates with a connecting bent pipe, and one end of the connecting bent pipe penetrates through one fixing plate; external normal-temperature air is discharged into the spiral pipe through the gas conveying pipe after being subjected to heat exchange and cooled by starting the condensing heat exchanger, and is converged with high-temperature flue gas conveyed into the spiral pipe, so that moisture in the flue gas is conde