气升式内循环反应器结构优化及应用

Structural optimization of airlift internal loop reactors and applications

通过对新型反应器的研究成果进行总结,深入了解气升式内循环反应器在各领域的发展情况,为新型反应器在今后的应用提供了方向。在反应器结构优化过程中,通过对前人所采用的结构优化方法进行总结,发现采用CFD研究方式明显多于实验研究方式,并且模拟研究中多以欧拉-欧拉两相流为主。模拟研究结果显示,各个结构存在1个最佳取值范围:高径比在7附近,环隙比在1附近,底隙高度约等于下降区狭缝长,气体分布器一般是根据实际情况进行选择。虽然不同的研究中结构参数存在差异,但是其主要的结构参数取值范围大致相同。

The application situation of airlift internal loop reactors in various fields is deeply analyzed and introduced through reviewing the research progress of novel reactors,which provides referential directions for the application of novel reactors in the future. It is found via summarizing the structural optimization methods used by the predecessors that the CFD method has been used more frequently than the experimental research method in structural optimization to reactors.In addition,the Euler-Euler two-phase flow model is the main model for simulation research.The results of simulation study show that there is an optimal range for each structure： the ratio of height to diameter is around7,the ratio of ring to gap is around 1,the bottom clearance height is approximately equal to the down-comer zone length,and the gas distributor is generally selected based on the actual situation.Although the structural parameters are different in different studies,the range of the main structural parameters is approximately the same.