低放废液蒸发浓缩过程中结垢性能影响因素分析

摘要

对低放废液在处理过程中结垢造成的后果进行了总结,对结垢趋势和腐蚀趋势的判断方法进行了介绍,重点对pH、温度、Ca2+和HCO-3对结垢趋势以及结垢量的影响进行了计算和讨论.结果表明,pH值是影响结垢趋势以及结垢量的主要原因;温度增加时,结垢程度增加,但是Ca2+、HCO-3对结垢程度的影响不如pH的影响明显.结论:适当的降低废液的pH,可以有效减小碳酸钙结垢量.%The consequences of scaling in the treatment of low waste liquid were summarized. The judging method of scaling tendency was introduced. The influence factors of scaling performance during evaporation and concentration were calculated and discussed, including pH, temperature, [Ca2+] and [HCO-3]. The result showed that pH had the main effect on scaling tendency and the amount of scale. When the temperature increased, the scale increased, but Ca2+, HCO-3 did not affect the scale as much as pH. Reducing the pH of waste liquid can reduce the scale of calcium carbonate.