Flue gas waste heat recovery device capable of quickly replacing heat conduction pipe

The utility model discloses a heat conduction pipe rapid replacement flue gas waste heat recovery device which comprises a flue gas heat exchange box, an air inlet, a purification mechanism, a heat conduction pipe body and a positioning frame, the positioning frame is arranged at the bottom of the flue gas heat exchange box at equal intervals, and the purification mechanism is arranged on one sideof the interior of the flue gas heat exchange box. An air inlet is formed in the outer wall of one side of the flue gas heat exchange box, one end of the air inlet extends into the flue gas heat exchange box, an exhaust port is formed in the outer wall of the side, away from the air inlet, of the flue gas heat exchange box, one end of the exhaust port extends into the flue gas heat exchange box,and a water tank is arranged above the flue gas heat exchange box; supporting feet are installed at the corners of the bottom end of the water tank, and the bottom ends of the supporting feet are fixedly connected with the top