本发明公开了一种电解海水制氯系统及其方法，所述方法包括，取海水，采用热法海水淡化处理所述海水，获得盐水；将所述盐水与碱液混合均匀，获得混合液；所述混合液的pH值为10～11；将所述混合液和碳酸钠溶液混合、搅拌后，进行过滤，获得一次滤液；将所述一次滤液与氢氧化钠溶液依次混合、搅拌后，进行过滤，获得二次滤液；将所述二次滤液进行电解，获得次氯酸钠溶液。采用本发明公开的方法电解海水制氯，极板酸洗频率低，使用周期长，制氯效果高。

The invention discloses a system and method for producing chlorine by electrolysis of seawater. The method includes taking sea water, and treating the sea water by thermal desalination to obtain salt water. The brine and lye are mixed evenly to obtain a mixed solution. The pH value of the mixed solution is 10～11. After mixing and stirring the mixed solution and the sodium carbonate solution, the solution is then filtered to obtain a primary filtrate. After mixing and stirring the primary filtrate and sodium hydroxide solution in sequence, filtering is performed to obtain a secondary filtrate. The secondary filtrate is electrolyzed to obtain a sodium hypochlorite solution. By adopting the method disclosed in the invention to electrolyze seawater to produce chlorine, the frequency of electrode plate pickling is low, the service period is long, and the chlorine producing effect is high.