CAJ | 학술논문

对低界面张力体系正丁醇-丁二酸-水在往复振动筛板塔中的萃取性能进行研究，体系中水为萃取剂，萃取正丁醇中的丁二酸。实验考察了两相流速、相比、传质方向和筛板振动速率对流体力学性能和传质性能的影响，并且与相同操作条件下固定筛板萃取塔的性能作对比。结果表明，筛板振动速率不高于3.5 cm/s的情况下体系没有发生乳化现象，相比增大到2.8时接近液泛点，实验稳定性较差。流速和相比增大能够获得更好的液滴分布和更大的体积传质系数，但增大的幅度要综合考虑设备的最大通量和两相在塔内的停留时间。分散相到连续相的传质方向传质相界面积大，更有利于提高传质效率。相同操作条件下，连续相中的轴向混合远大于分散相的轴向混合。与固定筛板塔的萃取性能相比，振动筛板改善液滴分布、增大处理能力和强化传质的作用都很明显。
대저계면장력체계정정순-정이산-수재왕복진동사판탑중적췌취성능진행연구，체계중수위췌취제，췌취정정순중적정이산。실험고찰료량상류속、상비、전질방향화사판진동속솔대류체역학성능화전질성능적영향，병차여상동조작조건하고정사판췌취탑적성능작대비。결과표명，사판진동속솔불고우3.5 cm/s적정황하체계몰유발생유화현상，상비증대도2.8시접근액범점，실험은정성교차。류속화상비증대능구획득경호적액적분포화경대적체적전질계수，단증대적폭도요종합고필설비적최대통량화량상재탑내적정류시간。분산상도련속상적전질방향전질상계면적대，경유리우제고전질효솔。상동조작조건하，련속상중적축향혼합원대우분산상적축향혼합。여고정사판탑적췌취성능상비，진동사판개선액적분포、증대처리능력화강화전질적작용도흔명현。
This paper studied the extraction performance of low interfacial tension system n-butanol-succinic acid-water (BSW) in a Reciprocating Plate Extraction Column (RPEC). Water as the solvent, extracted succinic acid from n-butanol phase. The experiment investigated the effects of flow rate,phase ratio, mass transfer direction and reciprocating rate upon the hydrodynamic and mass transfer performance. The results of extraction using stable sieve plate were compared. The results indicated that the reciprocating rate of plates should not be higher than 3.5cm/s to avoid emulsion. When phase ratio was 2.8,the operation approached the flooding point,and the experiment was not stable. The distribution of drops was better and the volumetric mass transfer coefficient was greater under the condition of higher flow rates and larger phase ratio. However, the range of increase was limited by the maximum throughput and the residence time of two phases. Due to its larger interface area, mass transfer direction from dispersed phase to continuous phase was beneficial in improving efficiency. The axial mixing in continuous phase was much more serious than in dispersed phase under the same operation conditions. Compared to stable sieve plate,the reciprocating plates can improve drops distribution increase the processing capacity and intensify mass transfer.