Multi-stage Purification System

Core Principles

  1. Staged Filtration

    • Each stage employs specific technologies (e.g., microfiltration, activated carbon, ultrafiltration, RO) targeting different contaminant sizes.

    • Pre-filters protect downstream stages: Coarse filters (e.g., PP cotton) remove large particles, extending the lifespan of precision filters (e.g., RO membranes).

  2. Technology Synergy

    • Physical filtration (screening) + Chemical adsorption (chlorine/odor removal) + Ionic purification (heavy metal/ion removal).

    • Example Flow:

      • Stage 1: PP Cotton → Sediment, rust (5-50 μm)

      • Stage 2: Activated Carbon → Chlorine, organic matter

      • Stage 3: RO Membrane → Heavy metals, viruses (0.0001 μm)

Standard Configuration (Household Purifiers)

Stage Technology Function Precision
1 PP Cotton Sediment, rust removal 1-5 μm
2 Pre-carbon Chlorine, odor, organic adsorption -
3 UF or RO Membrane Bacteria, viruses, heavy metals 0.001-0.0001 μm
4 Post-carbon Taste improvement, secondary contamination prevention -
5 (Optional) Mineralization Cartridge Adds beneficial minerals (Ca²⁺, Mg²⁺) -

✅ Typical Process: Tap water → PP → Carbon → RO → Post-carbon → Drinking water

Advantages

  1. Enhanced Purification

    • Overcomes limitations of single-stage systems.

  2. Extended Filter Life

    • Pre-filters protect high-cost components (e.g., RO membranes), reducing maintenance expenses.

  3. Holistic Water Quality

    • Balances safety (contaminant removal) and health (mineral retention/addition).