基于高溶气量的新型气浮系统的性能  

Performance of new flotation system based on high dissolved air content

作　　者：王新海[1] 郑伟[1] 马骏 马双龙[1] 刘小强[1] 张庆友[1] 

机构地区：[1]河南大学化学化工学院环境与分析科学研究所,河南开封475004 [2]蓝星环境工程有限公司国家环境保护膜分离工程技术中心,北京101300

出　　处：《化工学报》2013年第3期1099-1105,共7页CIESC Journal

基　　金：教育部留学回国人员科研启动基金资助项目(2009(1001))~~

摘　　要：近年来，随着我国水资源短缺和水体污染日趋严重，废水的处理和净化更加受到人们的重视[1]。作为一种重要的水处理技术，气浮净水在我国得到了迅速发展：在用于给水中含藻、低浊和受轻微污染水体的净化，及排水中印染、造纸、皮革、炼油、电镀、化工、化纤、餐饮、浴室等废水的处理中都已经取得了较好的效果[2]。A new kind of flotation system with high dissolved air content was developed through investigating the fundamental principles of oxygen transfer in water and hydromechanics. The air dissolving and releasing performance of the new flotation was studied based on the clean water aeration and coagulation-flotation experiment of reactive yellow KE-4RN simulated waste water. The results showed that the new flotation system had such advantages as high oxygenation capacity, low working pressure, high dissolved air content, small bubble size, no packing and low energy consumption. In the experiments of oxygen-free water aeration, the mass transfer coefficient of 02 KLa （20） was 0. 4151 min -1. Meanwhile the content of saturated dissolved oxygen in clean water was high （more than 11.00 mg · L 1） and the produced micro-bubbles had a mean diameter of 38 μm. A removal rate of 99.0% could be achieved for reactive yellow KE-4RN simulated waste water by coagulation and air flotation under the experimental conditions of dye concentration 100 mg · L-1, dosage of polymerization aluminum chloride （PAC） 800 mg · L-1 and dosage of polyacrylamide （PAM） 20 mg· L -1.

关 键 词：气浮 溶解氧 微细气泡 活性黄KE-4RN 

分 类 号：TQ051.8[化学工程] X703.3[环境科学与工程—环境工程]