Double-end Deboronization Process for Large-scale Reverse Osmosis Desalination System
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第36卷
Number:
7 7
Page:
26-31
Column:
Date of publication:
2020-04-01
- Abstract:
- A double-end deboronization process was designed and applied in a large-scale reverse osmosis desalination system,and the effects of secondary influent pH, seawater temperature and boron content on deboronization performance of the process were explored by using reverse osmosis system analysis software. The novel process could effectively remove boron in seawater. When the pH of the secondary influent was 9.5, the fresh water quality could reach the standard.When the seawater temperature and boron content were low, the fresh water quality could reach the standard by only operating the first-stage system. When the temperature was higher than 13 ℃ or the boron content was more than 2.3 mg/L, the second-stage system should be started for further deborating. When the temperature was higher than 30 ℃ or the boron content was more than 6.0 mg/L, pH of the secondary influent had to be appropriately increased to improve the deborization rate,so as to achieve the boron content in the fresh water reaching the standard. Compared with traditional deboronization process, double-end deboronization process could reduce the treatment scale of the second-stage system by 43%,and the construction investment and operation cost of the secondary system were both reduced by 43%.
Last Update:
2020-04-01