Investigation of extraction fraction in confined impinging jet reactors for tri-butyl-phosphate extracting butyric acid process

The extraction fraction E and overall volumetric mass transfer coefficient kka of TBP extracting butyric acid pro- cess in confined impinging jet reactors （CIJR） with two jets were investigated. The main variables tested were the concentration of tri-butyl-phosphate （TBP） and butyric acid, the impinging velocity V, the impinging velocityratio of two phases Vorg/Vaq, the nozzle inner diameter di and the distance L between the jet axes and the top wall of the impinging chamber. The results showed that E and kLa increase with an increase of the impinging velocity V, the concentration ofTBP Corg, and the impinging velocity ratio Vor/Vaq. However, E and kta decrease with an increase of the inner diameter d1 from 1 to 2 mm, the concentration of butyric acid Caq from 0.5% （v/v） to 2% （v/v）. The factor L ranging from 3 to 11 mm has a negligible effect on E and kLa. A correlation on these variables and kLa was proposed based on the experimental data. These results indicated good mass transfer oerformance of CIJR in the extraction operation.

小型受限撞击流反应器内混合特征及激励强化

利用平面激光诱导荧光技术（planar laser induced fluorescence，PLIF）研究了小型受限撞击流反应器（confined impinging jets reactor，CIJR）内混合特征及激励强化，射流入口Reynolds数范围为75～150。研究结果表明，在受限撞击流反应器内，由分离流模式向自持振荡模式转变过程中，两股流体间的混合效果逐渐提升；当流动为分离流模式时，激励能有效地强化两股流体间的混合，而当流动转变为自持振荡模式时，激励对流体混合的影响较小。