Boiler flue gas tail end purification device

The utility model discloses a boiler flue gas tail end purification device which comprises a first connecting piece, a flow guide pipe, a purification chamber and an emptying pipe which are connected in sequence. The first connector comprises a first interface, a second interface and a third interface which are communicated with one another; the first connector is connected with the flow guide pipe, the second connector is connected with a boiler exhaust pipeline, and the third connector is arranged in an emptying mode. And a fan is arranged between the purification chamber and the emptying pipe. The tail end purification device can be directly connected with a boiler exhaust pipeline, driving force is provided through the draught fan, smoke drainage is achieved through the flow guide pipe, the smoke is further purified through the purification chamber and finally exhausted through the emptying pipe, the tail end purification device is connected with the boiler exhaust pipeline through the first connecting pi