段階 01 · 前処理
Pretreatment
Protect high-purity barriers from feed variability.
目的
Define the feed quality and pretreatment boundary that keeps RO and polishing equipment within its operating envelope.
エンジニアリング上の問い
- What suspended solids, oxidants, and organics reach RO?
- Which hardness, alkalinity, silica, and pH/temperature cases set the scaling basis?
- Which monitoring points prove feed compatibility, and what cleaning or replacement duty is expected?
主な入力
- Pretreatment flowm³/h
- Feed turbidityNTU
- Feed dissolved solidsmg/L
- Feed TOCmg/L
- Feed pHpH
- Feed temperature°C
- Feed hardness as CaCO₃mg/L as CaCO₃
- Feed alkalinity as CaCO₃mg/L as CaCO₃
- Residual oxidant / target organicsmg/L
- Dissolved silica as SiO₂mg/L as SiO₂
主な出力
- RO-feed turbidity basisNTU
- RO-feed dissolved-solids basismg/L
- RO-feed hardness basismg/L as CaCO₃
- RO-feed alkalinity basismg/L as CaCO₃
- RO-feed oxidant-residual basismg/L
- RO-feed dissolved-silica basismg/L as SiO₂
制約 / 設計上の考慮事項
- High-purity failure modes can originate in trace contamination and distribution dead legs, not only bulk salt removal.
- Feed characterization and pretreatment targets depend on the end use and on downstream membrane and polishing limits.
- UF/MF, carbon, and chemical-dose screens are conditional unit-operation checks; none supplies complete feed characterization or a species-specific RO scaling basis.
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