Flue gas heat exchange device for gas-fired boiler

The utility model discloses a flue gas heat exchange device for a gas-fired boiler, and relates to the technical field of gas-fired boilers, the flue gas heat exchange device comprises a plurality of fins arranged along a first direction, each fin is repeatedly bent in a V shape along a second direction, the second direction is perpendicular to the first direction, and the fins are arranged in the first direction. At least one side of each fin is provided with a plurality of protruding parts playing a role in disturbing smoke. The heat exchange tubes penetrate through the fins in the first direction; the heat exchange tubes and the fins are arranged in the shell, the shell is provided with a flue gas inlet and a flue gas outlet, a flue gas flow channel is formed between the flue gas inlet and the flue gas outlet, and the part, flowing through the heat exchange tubes and the fins, of the flue gas flow channel integrally extends in the third direction; the third direction is perpendicular to the first direction