摘要
针对海水淡化水存在着较强的腐蚀性且缓冲能力低等问题,开展了采用CO2酸化淡化水后溶解方解石的矿化实验,研究了CO2通量、水力停留时间、温度及跌宕对海水淡化水的矿化水质影响。结果表明,在CO2与淡化水的体积比为1/5,水力停留时间为15 min,温度为33℃时,矿化后的海水淡化水的Ca2+含量达到37 mg/L以上,Ca CO3碱度达到67 mg/L以上,矿化后的淡化水经过跌宕能大幅提高其p H值,使最终矿化出水水质具有很好的稳定性。
Aimed at the issues of strong corrosion and low buffering capacity in desalinated seawater, the CO2 acidification was adopted in desalinated water, and the mineralization test of calcite dissolution was carried out. The influence of COz flux, hydraulic retention time, temperature and its ups and downs on mineralized water quality of desalinated seawater was investigated. The results indicated that under the volume ratio of CO2/water was 1/5, hydraulic retention time was 15 min and temperature was 33℃, the Ca^2＋ concentration of desalinated seawater after mineralization could reach above 37 mg/L, the CaCO3 alkalinity could obtain above 67mg/L and the pH could increase greatly after ups and downs of the water in order to maintain the stable water quality in final mineralized outflow.
出处
《供水技术》
2015年第3期28-30,共3页
Water Technology
关键词
海水淡化水
矿化
CA^2+
碱度
desalinated seawater
mineralization
Ca^2＋
alkalinity
