Bubble drainage purification device

The utility model relates to the field of gas well wastewater purification, in particular to a foam drainage purification device which comprises a defoaming tank, the defoaming tank is provided with a medium inlet, a medium outlet and a dosing port, and a defoaming structure is arranged in the defoaming tank and comprises a stirring rod and a filter screen. The two ends of the stirring rod are rotationally connected with the top and the bottom of the defoaming tank respectively, the stirring rod is connected with a driving mechanism, the filter screen is connected with the stirring rod, and the filter screen and the inner wall of the defoaming tank are arranged in a clearance mode; solid impurities are intercepted through the filter screen, and a defoaming agent and foam drainage water are fully mixed through rotation of the stirring rod, so that gas in the foam drainage water is separated out more thoroughly, the defoaming time is shortened, and the defoaming efficiency is improved. 本实用新型涉及气井废水净化领域，特别涉及一种泡排水