Flapping device for heat recovery boiler

The utility model provides a flapping device for a heat recovery boiler. The flapping device is applied to the technical field of heat recovery boilers. The heat recovery boiler comprises a boiler body (1). A plurality of heat conduction pipes (2) are arranged in the boiler body (1) and installed on a supporting support (3), are each of a horizontal structure and are of a vertical structure as a whole. One end of each heat conduction pipe (2) is connected with a perpendicular flapping rod (4). A flapping part (5) capable of hitting the flapping rod (4) is arranged above each flapping rod (4). By means of the flapping device, adsorptive dust in high-temperature smoke of different concentrations can be processed and prevented from being accumulated on the heat conduction pipes, the adsorptive dust on the heat conduction pipes is effectively processed in time, the high heat conduction performance of the heat conduction pipes is ensured, and the boiler heat recovery efficiency is improved.