Device for detecting leakage of flue gas cooler module

The utility model discloses a leakage detection device for a flue gas cooler module. An irrigation leakage detection method can only be used for large leakage points, long observation time is needed for small leakage points, and the leakage points cannot be accurately judged due to the fact that water possibly boils. The device comprises an air entraining device (4) and a plugging device (3), wherein the air entraining device (4) is used for plugging an inlet of a cooling tube bundle (2) of a flue gas cooler (1); the plugging device (3) is used for plugging an outlet of the cooling tube bundle of the flue gas cooler; the air entraining device comprises an air entraining frame (6) for introducing compressed air and a retainer (5) for exhausting the compressed air in a multi-head manner; the air entraining frame is in sliding fit with the retainer, and a right-angle air outlet pipe (11) of the air entraining frame is connected with an air inlet head (20) of the retainer through a connecting hose (23). The devic