HECai-chang.Application of High-speed Air Floatation in Large Seawater Desalination Project in Iran[J].China Water & Wastewater,2023,39(18):141-146.
高速气浮在伊朗大型海水淡化工程的应用
- Title:
- Application of High-speed Air Floatation in Large Seawater Desalination Project in Iran
- 摘要:
- 伊朗某大型海水淡化工程采用高速气浮处理工艺。高速气浮利用特殊的强化溶气技术，可使溶气效率提高至95%以上，微气泡体积浓度大幅提升，气泡粒径更合理、分散能力更强。浮选分离区表面负荷可达20~25 m3/（m2·h），对海水中藻类的去除率可达95%以上，出水浊度<5 NTU，同时对水中有机类、油脂等污染物也有较好的处理效果。高速气浮作为膜法海水淡化的预处理工艺，效果显著，明显改善了后段工艺的运行工况，对膜系统的安全稳定运行起到了保障作用，可使超滤膜系统的化学清洗周期延长至6个月以上。
- Abstract:
- A large-scale seawater desalination project in Iran adopts the high-speed air flotation process, which uses special technology to increase dissolved gas efficiency to over 95%, greatly improve the volume concentration of micro-bubbles, create more reasonable bubble size and the stronger dispersion ability. The surface load of flotation separation zone can reach 20-25 m3/(m2·h), the removal rate of algae in seawater can reach more than 95%, the effluent turbidity is less than 5 NTU, and the organic pollutants, oil and other pollutants in water also have good treatment effect. As the pre-treatment of membrane desalination process, high-speed air floatation obviously improves the operation condition of the latter process, guarantees the safe and stable operation of membrane system, and extends the chemical cleaning cycle of ultra-filtration membrane system to over 6 months.
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