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Pre-Treatment System Components
1. Introduction
A pre-treatment system is the first protection stage in a complete water purification process. It helps remove particles, chlorine, hardness, and other impurities before water enters RO or EDI equipment.
The main components usually include sand filtration, activated carbon filtration, water softening, dosing, piping, instruments, and automatic control systems.
2. Pre-Treatment System Components Table
| Component | Material / Media | Function | Key Advantage | Typical Specification |
|---|---|---|---|---|
| Sand Filter | Quartz sand / Multi-layer media | Removes suspended solids, turbidity, and particles | Protects downstream equipment from clogging | Filtration accuracy: 10–50 μm |
| Activated Carbon Filter | Activated carbon | Removes chlorine, odor, and organic compounds | Protects RO membrane from oxidation | Chlorine removal >95% |
| Water Softener | Ion exchange resin | Removes hardness Ca²⁺ and Mg²⁺ | Prevents scaling in RO systems | Hardness removal >95% |
| Dosing System | PE tank + dosing pump | Adds antiscalant or disinfectant | Improves system stability | Adjustable dosing rate |
| Control Valve | FRP / PVC / SS | Controls filtration and backwash | Supports automatic operation | Manual / Automatic |
| Pressure Vessel | FRP / Carbon Steel / SS304 | Holds filtration media | Corrosion resistant | 0.6–1.0 MPa |
| Piping System | UPVC / SS304 / SS316L | Transfers water between units | Leak-resistant and hygienic | Customized layout |
| Flow Meter | Plastic / Stainless Steel | Monitors water flow rate | Ensures stable operation | ±5% accuracy |
| Pressure Gauge | Stainless Steel | Monitors system pressure | Detects fouling or blockage | 0–0.6 MPa |
| PLC Control Panel | PLC + HMI | Automates operation | Reduces labor costs | Optional automation |
Engineering Note:
The correct pre-treatment configuration should be selected according to raw water quality, operating hours, target water quality, and downstream equipment requirements.
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