Method and system for circulating purification treatment of layered slurry of wet desulfurization tower

The invention relates to a wet desulfurization tower layered slurry circulation purification treatment method and system, and relates to the field of slurry purification treatment, and the method comprises the following steps: S1, discharging desulfurized slurry to obtain to-be-treated slurry; s2, the to-be-treated slurry obtained in the step S1 is sequentially subjected to chemical adding reaction, air flotation decontamination and slurry precipitation treatment, and oil stain suspended matter, precipitates and purified slurry are obtained respectively; and S3, recycling the precipitate and the purified slurry obtained in the step S2 for desulfurization treatment for cyclic utilization, and discharging the oil stain suspended matter obtained in the step S2. According to the invention, effective purification of the slurry on the upper layer of the wet desulfurization absorption tower is realized, the operation is reliable, the effect is stable, the energy consumption is low, the cost is low, the effect is rem