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1、水质稳定指数的计算 1.饱和指数（L.S.I.） L.S.I.=pH-pHs0 结垢 L.S.I.=pH-pHs=0 不腐蚀不结垢 L.S.I.=pH-pHs6 腐蚀 3.结垢指数（P.S.I.） P.S.I.=2pHs- pHeq6 腐蚀 其中 pHeq=1.465lgM-碱度+4.54 式中 M-碱度系统中水的总碱度（以碳酸钙计） ，mg/L。表 1 A、B、C、D 系数换算表总溶解固体/（mg/L）A温度/B450.0702.60600.0822.54800.0942.491050.1062.441400.1182.391750.12102.342200.13152.212750.142
2、02.093400.15251.984200.16301.885200.17351.796400.18401.718000.19451.6310000.20501.5512500.21551.4816500.22601.4022000.23651.3331000.24701.274000130000.25801.16钙硬度或 M-碱度（以CaCO3计）/（mg/L）C 或者 D钙硬度或 M-碱度（以CaCO3计）/（mg/L）C 或者 D101.001202.08121.081302.11141.151402.15161.201502.18181.261602.20201.301702.232
3、51.401802.26301.481902.28351.542002.30401.602502.40451.653002.48501.703502.54551.744002.60601.784502.65651.815002.70701.855502.74751.886002.78801.906502.81851.937002.85901.957502.88951.988002.901002.008502.931052.029002.951102.04表 2 由总碱度查平衡 pH 值总碱度的十位数(CaCO3计)/ (mg/L)总碱度的百位数(CaCO3计)/(mg/L)0102030405
4、06070809006.006.456.706.897.037.147.247.337.401007.477.537.597.647.687.737.777.817.847.882007.917.947.978.008.038.058.088.108.138.153008.178.198.218.238.258.278.298.308.328.344008.358.378.388.408.418.438.448.468.478.485008.498.518.528.538.548.568.578.588.598.606008.618.628.638.648.658.668.678.688.698.707008.718.728.738.748.748.758.768.778.788.798008.798.808.818.828.828.838.848.858.858.869008.878.888.888.898.908.908.918.928.928.93
