The utility model relates to the technical field of chemical equipment, and discloses a
polyaluminum chloride recovery device which comprises a treatment box, a first fixing
pipe and a second fixing
pipe are fixedly embedded in the lower surface of the treatment box, and limiting connecting sleeves are installed on the surfaces of the first fixing
pipe and the second fixing pipe in a sleeving mode. And a corrugated
precipitation pipe is fixedly connected between the two limiting connecting sleeves. According to the aluminum
oxide waste liquid recycling device, the corrugated
precipitation pipe is mounted at the bottom of the treatment box, so that when aluminum
oxide waste liquid is recycled, the waste liquid can be input into the treatment box firstly, the waste liquid enters the corrugated
precipitation pipe, and solids in the waste liquid are blocked and precipitated by utilizing a concave-
convex structure on the surface of the corrugated precipitation pipe; and then liquid obtained after
solid separation is extracted and discharged through a liquid extraction pump and a liquid extraction guide pipe, so that the residue-liquid separation operation of waste liquid is achieved, a worker can disassemble the corrugated precipitation pipe subsequently, and
solid residues can be conveniently cleaned or collected.