Equipment and method for guaranteeing decolorizing efficiency in process of extracting salt from coking desulfurization waste solution

The invention discloses equipment and method for guaranteeing decolorizing efficiency in the process of extracting salt from coking desulfurization waste solution. The equipment disclosed by the invention comprises a centrifugal pump, a preheater, a decolorizing tower, a basket filter and a decolorizing clear liquid storage tank, wherein the decolorizing tower adopts jacket type design, the condition that high-pressure liquid directly impacts activated carbon is avoided, a filter core and a filter path are processed into special shapes, the activated carbon of large granules in the decolorizing tower can be intercepted, and the repeated use of the activated carbon is realized; the activated carbon with fine granules can penetrate through the decolorizing tower, and a manner of filtration and treatment outside the tower is adopted. Through the adoption of the method disclosed by the invention, the occurrence of tower blockage can be avoided, the continuous production is realized, and the decolorizing efficiency is guaranteed.