Date: 2024-01-01
Project Overview
- Project Name: Project No. PW1240103697
- Location: Sohar Free Zone, Oman
- System Process: HPW: EDI + SMB; DM: ASS + 1RO; Reclaimed: sedimentation + MMF + UF + 1RO
- Production Capacity: High-purity water 2×30 T/H; demineralized water 160 T/H; reclaimed water 200 T/H (clarifier + treatment)
- Water Quality Standard: HPW resistivity ≥ 18.0 MΩ·cm; DM conductivity ≤ 3 µS/cm; reclaimed water conductivity ≤ 80 µS/cm
System Scope:
- High-purity water: 2 × 30 T/H EDI + SMB units, resistivity ≥ 18.0 MΩ·cm
- Demineralized water: 160 T/H ASS + 1RO unit, conductivity ≤ 3 µS/cm
- Reclaimed water: 200 T/H sedimentation tank + MMF + UF + 1RO unit, conductivity ≤ 80 µS/cm
Client Profile
The end client is a polysilicon producer developing one of the Middle East’s largest high-purity polysilicon bases in a free zone. Polysilicon production is among the most water-intensive and purity-critical processes in the PV supply chain.
In accordance with the client’s confidentiality requirements, the customer name is withheld in this case study and the project is referenced by its contract number.
Technical Note: Process Terms
For your reference, here is a breakdown of the technical process mentioned:
- MMF: Multi-Media Filter — removes suspended solids and turbidity from feed water through layered filtration media (anthracite, sand and garnet).
- UF: Ultrafiltration — a membrane filtration stage that removes colloids, bacteria, viruses and fine particles, delivering stable, low-SDI feed water for reverse osmosis.
- 1RO: Single-stage Reverse Osmosis — one pass of reverse osmosis for salt removal.
- ASS: Automatic Softening System — an automated ion-exchange softener that removes hardness from feed water to protect downstream membranes.
- EDI: Electrodeionization — a continuous, chemical-free polishing process that combines ion exchange with electrical regeneration to produce high-resistivity water.
- SMB: Secondary Mixed Bed — a polishing mixed-bed ion exchanger, typically the final stage that lifts water resistivity to 18 MΩ·cm.
Project Location: Sohar Free Zone, Oman | System process: HPW: EDI + SMB; DM: ASS + 1RO; Reclaimed: sedimentation + MMF + UF + 1RO | Date: 2024-01-01
