纯碱生产废水的综合治理

Comprehensive Control of Pollution for the Waste Liquor and Process Wastewater from Soda Ash Production

介绍了纯碱生产过程中产生的蒸氨废清液和生产下水的综合治理情况。将废清液晒盐回收ＮａＣｌ，然后从母液中回收ＣａＣｌ２。在雨季等情况下对废清液的治理措施是，将其两次兑海水，使其各项指标（ＮＨ３ －Ｎ、ｐＨ、ＳＳ和ＣＯＤ等）达到国家排放标准。将生产下水进行油水分离和沉淀处理，除去大部分油和悬浮物后的废水作为锅炉冲渣水和ＣＯ２ 窑气洗涤水加以利用。

The comprehensive control of pollution for the waste liquor from ammonia distillation and the process wastewater from soda ash production is presented.Sodium chloride is recovered via evaporating the waste liquor by sun light,the calcium chloride is further recovered from the mother liquor.In rainy season the waste liquor is diluted with seawater by two times to make its all indexes(NH 3 N,pH,SS,and COD)meeting the national standards.The process wastewater is treated by oil separation and sedimentation to remove most of oil and suspended solids and then used as flushing water for boiler slag and washing water for CO 2 kilngas.