ZQXN type peripheral drive full bridge suction machine is used for wastewater treatment plant round two sink pool, to scrape the sludge deposited at the bottom of the pool to a set of suction pipe ports set along the radius direction, then through the central sludge drainage tube, so that the sludge returns or concentrates dehydration, while placing the pool surface float aside to the collection sludge funnel, through the collection sludge funnel out of the pool so that further processing