工业生产中会产生大量结构稳定的含油废水，将环流的概念引入传统的空桶式柱气浮工艺来处理含油水体，以克服空桶式浮选柱液体停留时间短、碰撞效率低的缺点，达到提高油水分离效果、深度净化水体的目的。实验中以超声乳化柴油水溶液作为原料，优选出适合本体系的气浮药剂二甲基二烯丙基氯化铵/丙烯酰胺共聚物（PDA），考察了环流气浮法中各工艺条件的影响。结果表明，当气体流量为250 L·h?1，液体流量为10 L·h?1，液位高度为6 cm，PDA用量为20 mg·L?1时，气浮效果最好，最高除油率可达90.48%。对比相同工艺条件下的空桶式柱气浮法，除油效率提高了10%以上，且气浮速度更快，具有很高的工业应用价值。
Significant amounts of oil-containing waste water are discharged in industrial processes, and it is difficult to separate the oil/water mixture. In this paper, a concept of air-lift loop was introduced to traditional flotation process to treat oil-containing water. In the experiment, oil-in-water emulsion was produced by ultrasound, and the flotation agent for this system was optimized first, as poly(acrylamide-co-diallyldimethyl ammonium chloride) (PDA). Then, the effect of different conditions in the loop flotation process was investigated. When air flow rate was 250 L·h?1, liquid flow rate was 10 L·h?1, liquid level was 6 cm, amount of PDA was 20 mg·L?1, oil removal rate was the highest. Concentration of oil was reduced from 900 mg·L?1 to 100 mg·L?1 and the highest efficiency was 90.48%. Compared with the traditional column flotation under the same condition, loop flotation was more effective and quick, with increased oil removal by 10%. The loop flotation concept wou
