采用蒸发结晶技术处理含汞废水

摘要

The application situation of evaporation-crystallization technology in the treatment of mer-＇ cury-containing wastewater was introduced. After the wastewater was treated by this technology, the total salt contents and chloride ion contents were lowered by 97.5% and 97% respectively, the removal rate of mercury was more than 80%, and the obtained water could be recycled to vinyl chloride production proce- dure. For 400 000 t/a PVC production plant, 12 000 m^3 mercury-containing wastewater efflux could be decreased per year, and the social effects and economic effects were better.%介绍了蒸发结晶技术在含汞废水处理上的应用情况，处理后的废水中全盐量下降97．5％，氯离子质量分数下降97％，汞脱除率在80％以上，可回用至氯乙烯工序。对于40万t／a聚氯乙烯装置，每年可减少外排含汞废水量12000m^3，具有良好的社会效益和经济效益。