Double vacuum purifier for hot-galvanizing zinc residue regenerating

The utility model relates to a double-vacuum purifying device, which is used for the regeneration of hot galvanizing zinc residues. The utility model comprises an inner pot, the inner pot is provided with an inner pot air pumping pipe, a crystallizer is movably arranged on the inner pot, and the periphery of the inner pot is also provided with a first electric heating wire which is connected with an external power supply. The utility model is characterized in that the outside of the inner pot is also provided with an outer pot which is sheathed on the inner pot, and an air pumping pipe of the outer pot is arranged on the outer pipe. The utility model has the advantages of little energy consumption, convenient vacuum maintenance and high temperature and deformation resistance. The electric heating wire which is used for heating is not easy to oxidate and erode.