Abstract
High-end applications require a very tall vertical extraction column in some cases which deteriorates protection against radiation and cannot be employed for indoor applications. On the other hand, horizontal extraction columns offer higher efficiency and pretension, but lower maximum throughput. In order to address this issue, the L-shaped pulsed extraction column is a new type of extractors which were recently introduced for such applications with area constraints. The objective of this study is to evaluate the effects of operating parameters and physical properties on the variation of holdup and slip velocity in this type of extractors for three liquid systems including toluene–water, butyl acetate–water and n butanol–water without and under mass transfer condition. A comprehensive investigation on the determination of predictive ability of available correlations for the holdup and slip velocity in pulsed plate columns has been conducted. Finally, new correlations are proposed for prediction of these parameters regarding operational conditions and physical properties.
Highlights
Solvent extraction is one of the methods applied in separation industry
To study the influence of operating parameters on the dispersed phase holdup and slip velocity, pulsation intensity as well as flow rate of the dispersed and continuous phases are varied in the range of 0.4–1.3 cm/s, 1.5–7 l/h and 1.7–9 l/h, respectively
The effect of operating parameters including pulsation intensity and flow rate of the continuous and dispersed phases on the dispersed phase holdup and slip velocity of phases is investigated in a new type of extraction column entitled “L-shaped pulsed sieve-plate column”
Summary
Solvent extraction is one of the methods applied in separation industry. There are numerous types of extractors including mixer-settlers, columns, and centrifugal extractors [1]. Pulsed columns are a class of solvent extractors which offer various advantages such as high throughput, simple design, low space requirement, and with no internal moving parts [2]. Various internals have been used so far in pulsed columns such as packing, perforated plates and disc and doughnuts. Pulsed columns can be classified in two structural groups: 1.
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