响应曲面法优化反渗透处理钢铁企业高氯循环水

Optimal reverse osmosis treatment of high chloride wastewater in iron and steel plants by response surface method

基于反渗透(Reverse Osmosis,RO)技术处理钢铁企业高氯循环水,研究了响应曲面法设计下温度、压力、pH值等因素对RO膜通量和截留率的影响,建立数学模型并进行三因素的优化设计分析。结果表明,各因素对膜通量的影响程度为:压力>温度>pH值;对截留率的影响程度为压力>pH值>温度;各因素之间交互作用对膜通量和截留率的影响均为:温度与pH值交互项>压力与pH值交互项>温度与压力交互项;当温度为26℃、压力为0.7 MPa、pH值为8时,可得到理论最优的RO分离效果:膜通量为21.716 L/(m^(2)·h)、截留率为96.226%。经试验验证,预测值实际误差较小,所建模型能较好地对实际情况进行预测。对使用后的RO采用SEM-EDS手段分析发现,膜面产生无机污染,污染物主要成分为钙盐。

Based on the methamphetamine(RO)technology to technical processing of steel companies,the impact of various factors such as the temperature,pressure,and pH value under the design of the curved surface is studied.The model and of design analysis three factors are optimized.Studies have shown that the impact of various factors on the amount of membrane flux is:pressure>temperature>pH value.The degree of impact on the cutting rate is:pressure>pH value>temperature.The influence of the interaction between various factors on membrane flux and retention rate is:temperature and pH value interaction term>pressure and pH value interaction term>temperature and pressure interaction term.When the temperature is 26℃,the pressure is 0.7 MPa,and the pH value is 8,the theoretical optimal RO separation effect can be obtained:the membrane flux is 21.716 L/(m^(2)·h),and the intercept rate is 96.226%.After experimental verification,the actual error of the prediction value is small,indicating that the model can better predict the actual situation.The RO was detected using SEM-EDS and inorganic pdlution was found on the membrane surface,most of which are calcium salts.