Vehicle tail gas desulfurization catalyst wastewater zero emission system and process

The invention relates to a vehicle tail gas desulfurization catalyst wastewater zero-emission treatment system and process. In the treatment system, an adjusting tank system is sequentially connectedwith a preheating system, an evaporation and concentration system, an evaporation and crystallization system, a cooling and crystallization system and a mother liquor drying system; condensed water generated by the system returns to the preheating system and then enters the catalyst production system; the evaporative crystallization system and the cooling crystallization system are respectively matched with a solid-liquid separation system; an ammonium-rich mother liquor pipe and a nitrate-rich mother liquor return pipe are arranged in the cooling crystallization system; the ammonium-rich mother liquor flows to the cooling crystallization system from the evaporation crystallization system, and the nitrate-rich mother liquor flows back to the evaporation crystallization system from the cooling crystallization syste