隔膜电解池诱导碳矿化同步实现降碳除硬的试验研究  

Experimental study on simultaneous carbon reduction and hardness removal achieved based on diaphragm electrolytic cells induced carbon mineralization

作　　者：巴立秋 BA Liqiu(Dongying Surveying and Mapping Institute Co.,Ltd.,Dongying 257000,China)

机构地区：[1]东营市勘察测绘院有限公司,山东东营257000

出　　处：《工业用水与废水》2025年第1期52-56,共5页Industrial Water & Wastewater

摘　　要：为达到同步降碳除硬的目的,采用PTFE膜构建隔膜电解池,并向阴极腔室补充CO_(2)以诱导碳矿化。试验结果表明,使用Na2SO4溶液作为电解液时,在0~10 mA/cm^(2)的电流密度范围内,阴极室出水pH值为7.0~11.35;当处理模拟循环冷却水时,在电流密度为10 mA/cm^(2)的条件下,以30 m L/min的速率曝入CO_(2)后,出水钙硬度可从500 mg/L显著降低到60 mg/L。同时,试验发现在曝气速率为10~50 m L/min的范围内软化效果随之先提升后降低;在电流密度为10 mA/cm^(2)、曝气速率为30 mL/min和水力停留时间为2 min的条件下,该方法可将实际循环冷却水的总硬度从1100 mg/L降低到210 mg/L。隔膜电解池诱导碳矿化同步实现降碳除硬的方法切实可行,可为推广电化学降碳除硬技术提供参考。In order to achieve the goal of simultaneous carbon reduction and hardness removal,PTFE membrane was adopted to build diaphragm electrolytic cells,and CO_(2)was added to the cathode chamber to induce carbon mineralization.The test results showed that,when using Na_2SO_4solution as the electrolyte,the pH value of the cathode chamber effluent was 7.0-11.35 in the current density range of 0-10 m A/cm^(2).When treating simulated circulating cooling water at the condition that,the current density was 10 m A/cm^(2),and the aeration rate of CO_(2)was 30 m L/min,the calcium hardness of the effluent water was significantly reduced from 500to 60 mg/L.It was found that the softening performance changes in a volcanic shape as the aeration rate increased in the range of 10 to 50 m L/min.Under the condition that the current density was 10 m A/cm^(2),the aeration rate was30 m L/min,the hydraulic retention time was 2 min,the total hardness of the actual circulation cooling water could be reduced from 1100 to 210 mg/L by the said method.The method of diaphragm electrolytic cells inducing carbon mineralization so as to realize simultaneous carbon reduction and hardness removal was feasible,which can provide a reference for the promotion of electrochemical carbon reduction and hardness removal technology.

关 键 词：循环冷却水 软化过程 PTFE膜 钙硬度 电化学软化 

分 类 号：X703.1[环境科学与工程—环境工程]