FLOCCULATION MAGNETIC SEPARATION DEVICE

摘要

Provided is a flocculation magnetic separation device that is able to reduce recovered floc and reduce the amount of used magnetic powder without using a chemical such as hydrochloric acid. The flocculation magnetic separation device has a return addition device (18) that returns recovered floc discharged from a magnetic separation device (16) to a raw water supply tube (12) at a position upstream of a rapid agitation tank (26) before the addition of a flocculant. By means of returning recovered floc to the raw water supply tube (12), it is possible to reuse recovered floc without using a chemical such as hydrochloric acid. Also, as it is possible to reuse magnetic powder contained in the recovered floc, it is possible to reduce the amount of new magnetic powder used.