The invention relates to the field of wastewater reuse treatment technology, in particular relates to a method and a device of wastewater reuse pretreatment in a adipic acid refining process. The method of wastewater reuse pretreatment in adipic acid refining process comprises the following steps: step 1, dissolving coarse adipic acid in hot water at temperature of 70 DEG C to 100 DEG C, obtaining coarse adipic acid aqueous solution after dissolving; step 2, using the coarse adipic acid aqueous solution for crystallization at temperature of 15 DEG C to 25 DEG C, and forming coarse adipic acid suspension liquid by crystallization of the coarse adipic acid aqueous solution; step 3, performing densification process on the coarse adipic acid suspension liquid, and putting slurry which is performed densification process into a centrifuge. According to the method and the device provided by the invention, crystallization, densification, cooling and filtering are performed on the coarse adipic acid aqueous solution, the filtered liquor is reused after a tundish is removed, the suspended particle is effectively prevented from entering into the tundish, the steady state of water quality in the tundish is guaranteed, so that the wastewater produced in the adipic acid refining process can be reused continuously, the wastewater is effectively reused, and the waste of adipic acid resources is avoided.

Method and device of wastewater reuse pretreatment in adipic acid refining process

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Method and device of wastewater reuse pretreatment in adipic acid refining process