水质饱和+稳定指数的计算

1、、水质稳定指数的计算1饱和指数（L.S丄）L.S.I.=pH-pHs>0结垢L.S.I.=pH-pHs=O不腐蚀不结垢L.S.I.=pH-pHs<0腐蚀其中 pHs= （9.70+A+B ） - （C+D）式中 A总溶解固体系数；B温度系数；C钙硬度系数；D M-碱度系数。2. 稳定指数（R.S.I.）R.S.=2pHs- pH<6结垢R.S.=2pHs- pH=6不结垢不腐蚀R.S.I.=2pHs- pH>6腐蚀3. 结垢指数（P.S.I.）P.S.I.=2pHs- pH<6结垢P.S.I.=2pHs- pH=6稳定P.S.I.=2pHs- pFeq>6腐

2、蚀其中 pHeq=1.465lgM-碱度+4.54式中 M-碱度一一系统中水的总碱度（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温度厂cB450.0702.60600.0822.54800.0942.491050.1062.441400.1182.391750.12102.342200.13152.212750.14202.093400.15251.984200.16301.885200.17351.796400.18401.718000.19451.6310000.20501.5512500.21551.4816500.22601.4022000.236

3、51.3331000.24701.27> 4000<130000.25801.16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D101.001202.08121.081302.11141.151402.15161.201502.18181.261602.20201.301702.23251.401802.26301.481902.28351.542002.30401.602502.40451.653002.48501.703502.54551.744002.60601.784502.65651.815002.

4、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值总碱度的百位数(CaC03 计)/(mg/L)总碱度的十位数(CaCO3计” (mg/L)010203040506070809006.006.456.706.897.037.147.247.337.401007.477.537.597.647.687.737.777.817.847.882007.917.947.978.008.038.058.

5、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

6、.918.928.928.93】、水质稳定判断1. Langelier 饱和指数LSI. = pH - pHL.S.I. = pH - pHL.S.I. = pH - pHs > 0 结垢s二0 不腐蚀不结垢s V 0腐蚀其中:pH s = PKZ PKs + Pea + PM-碱度 + 2.5 卩Kz、Ks以活度表示的碳酸的二级电离常数和碳酸钙的溶度积M碱度以甲基橙为指示剂所测定的总碱度卩离子强度也可将上式进行简化如下:pH s =（ 9.7+A+B） （ C+DA总溶解固体系数；E温度系数；C钙硬度系数；DM碱度系数.A、E、C、D系数换算表:总溶解固体mg/lA温度CB钙硬度或M-

7、碱度（以 CaC（3计）mg/lC或D钙硬度或M-碱度 （以 CaCO3计）mg/lC或D450.0702.60 1101.001302.11600.0822.54121.081402.15800.0942.49141.151502.181050.1062.44161.201602.201400.1182.39181.261702.231750.12102.34201.301802.262200.13152.21251.401902.282750.14202.09301.482002.303400.15251.98351.542502.404200.16301.88401.603002.485

8、200.17351.79451.653502.546400.18401.71501.704002.608000.19451.63551.744502.6510000.20501.55601.785002.7012500.21551.48651.815502.7416500.22601.40701.856002.7822000.23651.33751.886502.8131000.24701.27801.907002.85> 40000.25801.16851.937502.88<13000901.958002.90951.988502.931002.009002.951052.02

9、1102.041202.082. Ryznar稳定指数R.S.I是由雷兹纳在实际工作中总结出的一个经验公式，计算式如下:R.S .I.=2pHs - pH v 6结垢R.S .I.=2pHs - pH=6不腐蚀不结垢R.S .I.=2pHs - pH> 6腐蚀同L.S.I相比，R.S.I更接近实际，但同L.S.I 一样未考虑水处理因素对结 垢的影响，因此也只能对未作处理的原水作判断。3Puckorius 结垢指数P.S.I 是帕科拉兹在稳定指数 R.S.I 的基础上提出来的一个经验公式， 他用平衡pH,即PHq代替R.S.1计算公式中的实测pH, P.S.1比R.S.1更接近实际。PHeq的计算公式如下：PH eq = 1.465 lgM +4.54R.S.I. = 2pHs-pHeqv6结垢R.S.I. = 2pHs-pHeq=6不腐蚀不结垢R.S .I. = 2pHs-pHeq>6腐蚀M系统中水的总碱度（以CaC计）,mg/l由于 P.S.I 只是用总碱度对 R.S.I 进行修正，也未考虑到人为的水处理措施 对结垢的影响，因此在实际应用中具有较大的局限性。pHeq = 1.465lgM + 4.544. 临界 pH 结垢指数临界PH结垢指数是由法特诺提出来的。他用实验的方法测出结垢时水的真 实P