糠醛精制新型萃取塔的研究和应用

Study on performance of new type-stack packed extraction column for furfural refining unit

在塔径为０．１ｍ的自行开发的蜂窝型格栅（ＦＧ型）规整填料萃取塔中进行了两相流体力学行为和传质性能的实验研究，体系是具有低界面张力的正丁醇—丁二醇—水和中等界面张力的３０％磷酸三丁酯（ＴＢＰ）煤油溶液—乙酸—水，实验测定了液滴平均直径，分散相存留分数、两相液泛速度等参数及以每个理论板高度表示的传质特性。实验结果表明，这种新型萃取塔对中、低界面张力体系具有通量大、传质效率高等特点，尤其适合于糠醛精制润滑油体系。将其应用于新疆独山子炼油厂的糠醛精制转盘萃取塔的技术改造获得成功，取得了显著的经济效益。

The hydrodynamics and mass transfer experiments were carried out in a 0.1m diameter extraction column with a new type of (FG) stack packing developed recently in our laboratory. The working systems used were nbutanol/succinic acid/water with low interfacial tension about 1.50 mN/m and 30% TBP (kerosene)/acetic acid/water with interfacial tension about 10.0 mN/m. Experimental results obtained indicate that (FG) stack packed extraction column is proved to possess high throughput capacity and excellent mass transfer efficiency. Replacing rotary discs with FG packings in tube furfural extraction tower were quite successful with significant economical benefits being claimed.