Date: 2020-09-07
Project Overview
- Project Name: Project No. PW12009029
- Location: Suqian City, Jiangsu Province, China
- System Process: MMF + ACF + 2RO + EDI + SMB (per train)
- Production Capacity: 2×60 T/H (relocated) + 2×60 T/H (new), 240 T/H total
- Water Quality Standard: Ultrapure water, 18 MΩ·cm class (EDI + mixed-bed polishing)
System Scope:
- Two relocated 60 T/H ultrapure water trains (equipment reuse)
- Two brand-new 60 T/H ultrapure water trains
Client Profile
The end client is one of the world’s leading photovoltaic companies, and the project site is one of its major high-efficiency cell manufacturing centers in China. Large-format, high-efficiency cell lines require extensive ultrapure water for wet-chemical processing.
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).
- ACF: Activated Carbon Filter — removes residual chlorine, organic matter, color and odor to protect downstream membranes and ion-exchange resins.
- 2RO: Two-stage Reverse Osmosis — two RO passes in series, producing water of significantly higher purity and lower conductivity.
- 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: Suqian City, Jiangsu Province, China | System process: MMF + ACF + 2RO + EDI + SMB (per train) | Date: 2020-09-07
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