System and process for recovering wastewater containing sodium bromide and sodium carbonate

The invention discloses a system and a process for recovering wastewater containing sodium bromide and sodium carbonate, the system comprises a pretreatment module, an evaporative crystallization module and a cooling crystallization module, the pretreatment module is used for filtering impurities in the wastewater to obtain a mixed solution of sodium bromide and sodium carbonate; the evaporative crystallization module is used for heating the sodium bromide-sodium carbonate-water ternary mixed system to an evaporation temperature and continuously evaporating and concentrating to separate out sodium carbonate crystals and obtain mother liquor containing sodium bromide and sodium carbonate, and the cooling crystallization module is used for cooling the mother liquor containing sodium bromide and sodium carbonate to a cooling temperature and separating out sodium bromide crystals. Therefore, a mixed solution of sodium carbonate and sodium bromide is obtained through the pretreatment module, and then a high-concen