钢铁循环水补水水质及系统运行方案优化

Optimization of make-up water quality and system operation scheme of steel circulating water

为了进一步探究钢铁行业循环水补充水加药方案,利用主成分分析法分析不同水质类型的时空分布特点,并采用结垢指数法分析5个地区补充水水质类型和不同浓缩倍数下的结垢倾向,从而确定加药方案。主成分分析结果表明:补水为地下水时主要受钙硬、电导率、总碱和氯离子影响,补水为河流水或市政水时主要受总铁与浊度影响;结垢指数法表明:地下水为补充水偏结垢,河流水或市政水为补充水偏腐蚀;建议地下水为补水时浓缩倍数为4~5,河流水或市政水为补水时浓缩倍数为3~4。依据各地区水质类型与浓缩倍数,优化各地区的建议加药方案。

In order to further investigate the dosing scheme for circulating water in the steel industry,the spatial and temporal distribution of different water quality types was analyzed using principal component analysis.Moreover,the scaling index method was used to analyse the tendency of scaling in five regions under different water quality types and different concentration multiples to determine the dosing scheme.The principal component analysis showed that:groundwater was mainly affected by calcium hardness,conductivity,total alkali and chloride ions,while river water or municipal water was mainly affected by total iron and turbidity;the scaling index method shows that:groundwater was scaling for supplementary water,while river water or municipal water was corrosive for supple⁃mentary water;it was recommended that the concentration factor was 4-5 when groundwater was supplementary wa⁃ter,and 3-4 when river water or municipal water was supplementary water.Based on the type of water quality and the concentration factor in each area,the recommended dosing plan for each area is optimized.