A number of proprietary technologies are adopted in the process, such as ultra-low-pressure energy-saving RO membranes that cut power consumption, a combined bactericidal and scale-inhibiting agent that raises RO water recovery, and full reuse of first-stage RO concentrate for backwashing. These measures have been consistently well received by users for stabilising product water quality, extending equipment service life and reducing operating energy consumption.
The process train consists of mechanical filtration (sand / carbon or disc filters) + ultrafiltration + double-pass reverse osmosis + degassing membrane + EDI + UV + TOC reduction + nitrogen blanketing + polishing mixed bed + terminal filtration + online monitoring. It has been applied successfully in a large number of pure water and ultrapure water projects in the drinking water, medical, automotive, machining, electronics, semiconductor, polysilicon and solar industries.
Selected Ultrapure Water References
Yuxin Integrated Circuit Packaging & Testing (Chengdu) Co., Ltd. - 18.0 MΩ·cm ultrapure water and demineralised water, softened water production plant;
Leshan-Phoenix Semiconductor Co., Ltd. - 18 MΩ·cm high-purity water plant for wafer rinsing; Jiangsu Wujin Hanergy Photovoltaic Co., Ltd. - 18.0 MΩ·cm ultrapure water plant;
Sichuan Yongxiang Polysilicon Co., Ltd. - demineralised water and 18.2 MΩ·cm ultrapure water project;
Dürr Painting Systems Engineering (Shanghai) Co., Ltd., Germany - pure water and softened water project;
Hainan Automobile Group Co., Ltd. - 5 µS/cm double-pass RO pure water project;
Mazda (Nanjing) Automobile Co., Ltd. - softened water project.
