Zero-discharge pretreatment process for coking wastewater

The invention discloses a coking wastewater zero discharge pretreatment process which comprises the following steps: conveying coking wastewater from an adjusting tank to a clarification tank device, softening and removing turbidity of the coking wastewater, conveying the softened and turbidity-removed coking wastewater to pass through an immersed ultrafiltration membrane, and conveying the coking wastewater from which residual suspended matters and colloids are removed by the immersed ultrafiltration membrane to a resin softener, and conveying the coking wastewater passing through the resin softener to an advanced oxidation device to obtain pretreated produced water meeting the quality of subsequent membrane concentrated inlet water. The invention belongs to a coking wastewater treatment process, and particularly relates to a coking wastewater zero-discharge pretreatment process which effectively removes pollution factors influencing subsequent membrane concentration and ensures stable operation of subsequen