论文部分内容阅读
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。
The effects of NaCl concentration, hot air temperature, feed rate and atomizer speed on the recovery of NaCl crystal and the water content of NaCl crystal were discussed by orthogonal experiment. The results showed that the optimal combination of spray crystallization for treating high concentration brine was hot air temperature 160 ℃, feed volume flow 4 L / h and atomizer speed 600 r / min. Under the condition of other factors being invariable, with the increase of NaCl content, the recovery rate and water content of NaCl crystal decreased. By adjusting the fan flow rate, additional gas hammer at the bottom of the conical drying chamber, scouring device wall and other methods can significantly improve the recovery rate of NaCl crystals. Under the conditions of NaCl concentration of 20%, hot air temperature of 160 ℃ and atomizer rotation speed of 600 r / min, the natural logarithm of freshwater conductivity was used to regress the change of feed volume. The regression equation was determined as γ = (1.267 m S /cm)exp[0.823 7qV / (L · h -1))]. The energy consumption of the spray crystallization method for treating high concentration brine was calculated. The hot air temperature of 160 ℃ increased by 9.64% more than the hot air temperature of 100 ℃.