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June 24, 2026 This project is a 2 × 75 T/H demineralized water equipment project for Hebei Kaiyi, designed to produce stable demineralized water for industrial process use.
The system adopts a combined treatment process of multi-media filtration, activated carbon filtration, reverse osmosis, degassing, and mixed bed polishing. The final mixed bed water production capacity is 150 m³/h, with the provided outlet conductivity controlled at ≤0.2 μS/cm and silica controlled at ≤20 μg/L.
The whole system is equipped with PLC automatic/manual switching control, supporting stable operation and flexible system management.
The project uses multi-media filters and activated carbon filters as the pretreatment system. This pretreatment stage helps remove suspended solids, particles, organic impurities, residual chlorine, odor, and other substances that may affect downstream membrane operation.
After pretreatment, the water enters the reverse osmosis system for desalination. The RO system removes most dissolved salts and ionic impurities, reducing the load on the downstream polishing section.
The system then uses a degasser and mixed bed as the final desalination and polishing process. The mixed bed further reduces residual ions and helps produce high-quality demineralized water for industrial applications.
According to the provided process, RO concentrate water is reused as backwash water for the multi-media filters and activated carbon filters. This design improves water resource utilization and supports more efficient system operation.
1. Combined RO + Mixed Bed Process
The system combines reverse osmosis desalination with mixed bed polishing, helping achieve stable low-conductivity demineralized water output.
2. 150 m³/h Final Water Production
The final mixed bed water output reaches 150 m³/h, meeting the customer’s large-capacity industrial water demand.
3. Stable Water Quality Control
The provided final water quality targets include conductivity ≤0.2 μS/cm and silica ≤20 μg/L, supporting high-quality demineralized water production.
4. Pretreatment for Membrane Protection
Multi-media filtration and activated carbon filtration are used before RO treatment to improve inlet water quality and reduce the risk of membrane fouling.
5. Concentrate Water Reuse
RO concentrate water is used for filter backwashing, helping improve water utilization and reduce unnecessary water discharge.
6. PLC Automatic/Manual Control
The complete system supports PLC automatic/manual switching, making operation more flexible for plant management and maintenance.
This project provides a practical reference for industrial users requiring large-capacity demineralized water production. By combining pretreatment, reverse osmosis, degassing, and mixed bed polishing, the system supports both water quality stability and operational reliability.
The reuse of RO concentrate water for filter backwashing also reflects a more efficient water treatment design, helping improve water resource utilization within the system.
Application Reference
This type of demineralized water treatment system can be used for:
The Hebei Kaiyi 2 × 75 T/H Demineralized Water Equipment Project demonstrates a complete industrial demineralized water treatment solution using multi-media filtration, activated carbon filtration, reverse osmosis, degassing, and mixed bed polishing.
With a final mixed bed water output of 150 m³/h, outlet conductivity of ≤0.2 μS/cm, silica of ≤20 μg/L, and PLC automatic/manual control, the project provides a useful reference for industrial customers seeking reliable large-capacity demineralized water systems.
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