工程工具 · 水处理

水稳定性与碳酸盐化学

计算碳酸盐体系物种分布，并透明报告 pHs、LSI 和 RSI 筛查值。

市政饮用水净化阶段 06 — Distribution & Final Quality

状态: 已上线

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01 · USER INPUT

Design basis and inputs

Measured pH *pH · current water sampleWater temperature *deg C · entered temperature is used in the LSI equation; carbonate speciation uses fixed 25 deg C reference constantsAlkalinity *mg/L as CaCO3 · current water; positive input required for LSICalcium hardness *mg/L as CaCO3 · current water; positive input required for LSITotal dissolved solids *mg/L · current water; positive input required for LSICompare an adjusted-water scenario *option · scenario is user-entered; no chemical dose is calculated

Engineering calculations run locally in this browser after assets load.

02 · CALCULATED RESULT

Results at a glance

Load or enter inputs, then calculate to create an authoritative result.

03 · REPORTING

Exports and verification

CSV contains input and output detail. PDF uses the current calculation and report metadata.

Verification suite

Calculation revision ad185526

69 focused fixtures: LSI/pHs/RSI reference case, carbonate alpha fractions and DIC, active scenario inputs, symmetric diagnostics, 25 deg C speciation basis, structured comparison, exports, and stale-result behavior. Tests are deterministic and run without network access.

此工程工具目前仅提供英文版本。

工程依据

方法

根据输入水质计算经验饱和 pH、LSI 和 RSI，并使用约 25 °C 固定参考常数进行仅含碳酸盐体系的形态近似。这些是筛选指标，不是完整地球化学平衡、腐蚀速率或自动药剂投加建议。

The empirical saturation-pH calculation uses entered water temperature: A = (log10(TDS) - 1)/10, B = -13.12 log10(T + 273) + 34.55, C = log10(calcium hardness) - 0.4, D = log10(alkalinity), and pHs = (9.3 + A + B) - (C + D).

LSI = measured pH - pHs. RSI = 2 pHs - measured pH.

The carbonate-only V1 approximation uses fixed reference constants at approximately 25 deg C: pKa1 = 6.35, pKa2 = 10.33, and Kw = 1e-14. Alpha fractions are calculated from hydrogen concentration and these constants.

Approximate DIC = (alkalinity equivalents - hydroxide + hydrogen)/(alpha1 + 2 alpha2), with alkalinity converted from mg/L as CaCO3 to equivalents per litre.

For current water and an enabled adjusted scenario, LSI uses the respective entered water temperature. Carbonate-only speciation continues to use fixed 25 deg C constants.

Scenario values are entered directly. The tool does not calculate a chemical dose or predict the effect of a treatment process.

范围 / 限制

物种分布采用固定的 25 °C 参考常数，经验 LSI 使用输入温度。输出仅为筛查指标，不构成腐蚀或结垢保证。
LSI and RSI are empirical numerical screening indices; this tool does not assign categorical water-quality status.
Carbonate speciation is a carbonate-only approximation. It omits phosphate, silicate, organic alkalinity, and full geochemical equilibrium.
No corrosion rate, lead or copper compliance, CCPP, chemical-dose solver, or automatic treatment recommendation is provided.
CCPP is deferred.

工程路径

上游背景

氯/氯胺 CT 与余氯设计以声明的处理、储水和成品水化学条件作为配水水质审查背景。
UV 消毒设计以声明的处理、储水和成品水化学条件作为配水水质审查背景。
清水池与储水周转设计以声明的处理、储水和成品水化学条件作为配水水质审查背景。

当前工具决策

水稳定性与碳酸盐化学计算碳酸盐体系物种分布，并透明报告 pHs、LSI 和 RSI 筛查值。

下游工程步骤

配水与最终水质审查将成品水依据带入供水单位监测、配水和项目运行审查。