喷雾结晶法处理高浓盐水实验研究

发布时间：2018-05-09 11:37

本文选题：喷雾结晶法 + 高浓盐水　；参考：《水处理技术》2016年01期

【摘要】：利用喷雾结晶法对高浓盐水进行处理,通过正交实验讨论了NaCl质量分数、热风温度、进料速度和雾化器转速对NaCl晶体回收率和NaCl晶体含水量的影响。结果表明,喷雾结晶法处理高浓盐水的优化组合为:热风温度160℃,进料体积流量4 L/h,雾化器转速600 r/min。在其它因素不变条件下,随着NaCl含量的增大,NaCl晶体回收率和含水量均呈降低趋势。通过调节风机流量,在干燥室圆锥底处增设气锤,冲刷装置内壁等方法可显著提高NaCl晶体回收率。在NaCl的质量分数为20%、热风温度160℃,雾化器转速600 r/min条件下,以淡水电导率的自然对数对进料量变化回归,确定回归方程为γ=(1.267 m S/cm)exp[0.823 7qV/(L·h~(-1))]。对喷雾结晶法处理高浓盐水进行能耗统计,采用160℃热风温度仅比采用100℃热风温度多增加9.64%的能耗。
[Abstract]:The effect of NaCl mass fraction, hot air temperature, feed rate and atomizer speed on the recovery of NaCl crystal and the water content of NaCl crystal are discussed by the orthogonal experiment. The results show that the optimum combination of the high concentration brine with the spray crystallization method is 160 C of the hot air temperature and the volume flow rate of 4 L/h for the feed. When the speed of the atomizer is 600 r/min., with the constant conditions of other factors, with the increase of NaCl content, the recovery rate and water content of NaCl crystals are all decreasing. By adjusting the flow of the fan, adding air hammer at the cone bottom of the drying chamber and the inner wall of the scouring device, the recovery rate of the NaCl crystal can be significantly increased. The mass fraction of the NaCl is 20%, the hot air temperature is 16. Under the condition of 0 C, the rotational speed of the atomizer was 600 r/min, and the natural logarithm of fresh water conductivity was returned to the feed volume, and the regression equation was determined to be gamma = (1.267 m S/cm) exp[0.823 7qV/ (L. H~ (-1)). The energy consumption of high concentration brine treated by spray crystallization method was counted, and the energy consumption of 160 C was only 9.64% more than that of 100 C.

【作者单位】：中国海洋大学环境科学与工程学院中国海洋大学海洋环境与生态教育部重点实验室;京科高新(北京)环境科学研究所;
【基金】：北京市科技计划项目(D10110904680000)
【分类号】：X703;P747

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