A method of osmotically assisted reverse osmosis brine concentration and closed loop recovery
By using ionic aqueous solution temperature substances and thermally induced phase separation technology in osmosis-assisted reverse osmosis technology, combined with thermally induced phase separation and nanofiltration and desalination thermal processes, the method of brine concentration and closed-loop recovery has been solved. This solves the problem of high-efficiency deep concentration and closed-loop recovery of high-concentration brine that is difficult to achieve in existing technologies, and realizes the method of high-salt concentration and closed-loop recovery. It also realizes the process flow of deep concentration and closed-loop recovery of high-concentration brine in the field of brine treatment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- HEFEI INSTITUTE OF PHYSICAL SCIENCE CHINESE ACADEMY OF SCIENCES
- Filing Date
- 2026-05-11
- Publication Date
- 2026-07-17
AI Technical Summary
Existing osmosis-assisted reverse osmosis technology is difficult to achieve efficient deep concentration and zero liquid discharge in the treatment of high-concentration brine, and it fails to make full use of low-grade thermal energy resources, making it difficult to meet environmental protection standards.
An ionic, water-soluble substance with a critical miscibility temperature is used as the draw solution. Combined with thermally induced phase separation, nanofiltration, and desalination processes, a closed-loop recovery system is formed. Hydraulic pressure and permeation driving force are used to promote deep concentration of brine. The draw solution is regenerated through thermally induced phase separation, the water-rich phase is recovered by nanofiltration, and the permeate is desalinated.
It achieves a balance between high salt concentration, extractive liquid recovery, and product water quality, meeting environmental standards for zero or minimal liquid discharge, and improving resource utilization efficiency and environmental performance.
Smart Images
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