Electronic-grade chemical NMP (N-Methyl Pyrrolidone) demagnetizing device and demagnetizing method

The invention relates to an electronic grade chemical NMP demagnetizing device and demagnetizing method.The demagnetizing device comprises a liquid tank, an electric demagnetizing assembly, a waste liquid tank and a conveying pump, circulating demagnetizing is conducted between the liquid tank and the electric demagnetizing assembly through the conveying pump and a pipeline, and the waste liquid tank is connected with the electric demagnetizing assembly through the pipeline and used for removing demagnetized magnetic substances; the demagnetizing method comprises the following steps: (1) demagnetizing: in a power-on state, demagnetizing a material through the magnetic dielectric net and then refluxing the material into the liquid tank, and continuously circulating; (2) back blowing: in a power-on state, the materials stop entering, and the residual materials at the bottom of the electric demagnetizing cavity are pushed to a liquid tank by nitrogen pressure; (3) washing: in a power-off state, the materials sto