电解装置过滤盐水去除碳酸钠的工艺研究  

Research on the process of removing sodium carbonate from filtrated brine for electrolysis

作　　者：杨茂勤 张隆刚 马玉银 YANG Maoqin;ZHANG Longgang;MA Yuyin(Shaanxi Beiyuan Chemical Group Co.,Ltd.,Yulin 719319,China)

机构地区：[1]陕西北元化工集团股份有限公司,陕西榆林719319

出　　处：《氯碱工业》2025年第4期7-11,共5页Chlor-Alkali Industry

摘　　要：氯化钠电解产生的氯气中的二氧化碳主要源自用于除去采卤装置采集粗盐中含有的可溶性杂质(Ca^(2+)、Ba^(2+)等)的碳酸钠。对于连续生产的工艺,只能加入过量碳酸钠使盐水中的碳酸钙快速沉降,才能达到精制盐水的目的。陕西北元化工集团股份有限公司目前不能完全除去碳酸钠。采用模拟现场实际工艺控制情景的方法,得出碳酸钠与盐酸反应产生的二氧化碳与加酸量、反应时间和搅拌均存在一定关系。从以上三因素进行分析,最终确定能完全除去过滤盐水中碳酸钠的工艺流程。The carbon dioxide in the chlorine gas produced by sodium chloride electrolysis mainly comes from sodium carbonate used to remove soluble impurities(Ca^(2+),Ba^(2+),etc.)contained in the crude salt collected by the brine collection device.For continuous production processes,only by adding excessive sodium carbonate can the calcium carbonate in the brine be rapidly settled to achieve the goal of refining the brine.Shanxi Beiyuan Chemical Group Co.,Ltd.cannot completely remove sodium carbonate at present.By simulating the actual process control scenario on site,it was found that there are relationships between the carbon dioxide produced by the reaction of sodium carbonate and hydrochloric acid and the amount of acid added,reaction time,and stirring.Based on the analysis of the above three factors,the process flow that can completely remove sodium carbonate from filtered saltwater is ultimately determined.

关 键 词：碳酸钠 二氧化碳 反应时间 加酸量 搅拌 

分 类 号：TQ114.261[化学工程—无机化工]