Zero-emission treatment system and process for volatile phenol in salt-containing wastewater

The invention discloses a zero-emission treatment system for volatile phenol in salt-containing wastewater. A second material outlet of a first preheating heat exchanger is communicated with a feed port in the upper part of a first supercritical reactor; a first material outlet of a multi-flow heat exchanger is communicated with a feed port in the upper part of a second supercritical reactor through a second pipeline, and a medium outlet of the multi-flow heat exchanger is communicated with a feed port in the lower part of the first supercritical reactor and a feed port in the lower part of the second supercritical reactor. The invention also provides a zero-emission treatment process for volatile phenol in salt-containing wastewater. Pretreatment is carried out by using an air floatationtank, volatile phenol in the pretreated wastewater is partially removed, and quality-divided oxidation treatment is carried out on phenol-free wastewater and phenol-containing wastewater by using a multi-effect evaporator, so