P-xylene crystal separation method

The invention belongs to the technical field of p-xylene crystals and in particular relates to a p-xylene crystal separation method. The invention designs a special p-xylene crystal separation deviceand a corresponding method. The device structurally comprises a crystallization tank and a condensation tube, wherein a feeding hole, an exhaust hole and a discharge hole are formed in the crystallization tank; the condensation tube penetrates through the crystallization tank; parts of the condensation tube are retained inside and outside the crystallization tank respectively; a plurality of flowing liquid micropores are formed in the condensation tube inside the crystallization tank. As the condensation tube penetrates through the crystallization tank, a mixed p-xylene liquid raw material canbe subjected to heat exchange and cooling inside and outside simultaneously; in addition, due to design of the flowing liquid micropores, an inert cooling liquid slowly infiltrates into the crystallization tank from different