中水回用于循环冷却水系统结垢响应面模型设计研究

STUDY ON SCALING RESPONSE SURFACE MODEL OF RECLAIMED WATER REUSED FOR RECIRCULATING COOLING WATER SYSTEM

以循环冷却水的极限浓缩倍率作为评价标准,通过响应面优化法,拟合得到了水体极限浓缩倍率关于循环冷却水5种水质指标及阻垢剂加药量的2次回归方程,得到了循环冷却水部分水质指标、阻垢剂加药量与水体极限浓缩倍率之间的定量关系。试验结果表明,Ca2+、HCO3-、Mg2+含量、阻垢剂加药量和pH、浊度等因素均影响循环冷却水的结垢。响应面优化设计方法可以用于循环冷却水结垢模型的建立,通过响应面设计得到的模型能较好的用于水体结垢预测分析,为现场中水水质改变时,阻垢剂加药量的改变提供理论指导。

A quadratic regression that shows the equilibrium between scale inhibitor concentration and water quality equation has been proposed through the method of response surface optimization. The maximum water concentration ratio of cooling water was selected as the standard to estimate the scaling in cooling water system. The test results indicate that the six kinds of factors, including Ca^2＋, HCO3^-, pH, Mg^2＋, turbidity, scale inhibitor concentration all have effect on the scaling in cooling water system. The model can be used to predict the scaling in cooling water system, providing a theoretical value of the scale inhibitor concentration when the reclaimed water quality values.