冷冻法净化苦咸水的实验

Desalination of brackish water through freezing

利用调温冰柜在-4℃,-8℃,-10℃和-12℃的条件下对祖厉河水样进行实验研究,实验结果表明:冷冻法对苦咸水中超标离子(阴阳离子)的脱盐效果较显著;碎冰过滤可以进一步提高冰晶质量,使各超标离子平均总脱盐率都在95%以上;脱盐效果受冷冻温度和溶液质量浓度的影响,随着冷冻温度的降低或苦咸水质量浓度的增加呈现下降趋势.通过研究,可以充分利用甘肃省冬季的气候条件,丰富的咸水资源,采用冷冻法来淡化本地区的苦咸水,从而解决祖厉河流域上的饮水问题.

Freezing experiments with water samples from Zuli river by use of low temperature freezer at the freezing temperature of -4℃, - 8℃, - 10℃ and - 12℃ were carried out. Experimental results show that the desaltification of excessive ion in the brackish water is notable with the freezing method. Combined with the ice-crushing treatment, the average total desalination rate would be more than 95%. Desalination rate is affected by the freezing temperature and solution concentration. And with the reduction of freezing temperature or increase in the concentration of brackish water the desalination rate shows a downward trend. Considering the weather conditions of Gansu province, the freezing method can be used to desalinate brackish water, thus solving people＇s problem with drinking water in the Zuli river drainage area.