Prediction of Power Consumption in a Mechanically Agitated Gassed Reactor in Viscous Batches

Abstract

Volumetric mass transfer coefficient, power input, and gas holdup are key parameters in the design of mechanically agitated gas‐liquid contactors. Although the majority of industrial batches are of higher viscosity, reliable transport characteristics correlations for viscous batches are lacking in literature. These correlations are often based on the power input as the scale of energy dissipation. In order to develop reliable power input correlations, its measurements were carried out in a pilot‐plant vessel using multiple impellers of various types and diameters. Power input correlation shapes providing the best match with the comprehensive database are also expected to predict most precisely the impeller power in industrial‐scale vessels.

Power Input Prediction in Agitated Gas‐Liquid Contactors with Non‐coalescent Batch

“…As could be seen in Fig. 4, the Pg 2-3 /Pg 1 ratios remain roughly the same for both vessel sizes 5.1 ± 0.3 0.29 0.33 [14] 5.01 ± 0.12 0.59 0.33 [30] 5.03 ± 0.11 0.29 0.33 [30] 5.27 ± 0.08 0.59 0.25 [31] 5.01 ± 0.12 0.59 0.33 [31] 5.07 ± 0.11 0.59 0.40 [31] 5.05 ± 0.07 0.59 0.46 [31] 5.03 ± 0.11 0.29 0.33 [ 1.47 ± 0.12 0.59 0.33 [30] 1.72 ± 0.06 0.29 0.33 [30] 1.45 ± 0.03 0.59 0.25 [31] 1.47 ± 0.05 0.59 0.33 [31] 1.39 ± 0.01 0.59 0.40 [31] 1.48 ± 0.01 0.59 0.46 [31] 1.72 ± 0.06 0.29 0.33 [31] TXD 0.9 0.3 0.33 [33] 1 2.4 0.33 [34] 0.94 0.3 0.48 [35] 0.85 ± 0.1 0.29 0.33 [14] 0.86 ± 0.02 0.59 0.33 [30] 0.97 ± 0.04 0.29 0.33 [30] 0.79 ± 0.09 0.59 0.25 [31] 0.86 ± 0.02 0.59 0.33 [31] 0.85 ± 0.01 0.59 0.40 [31] 0.95 ± 0.01 0.59 0.46 [31] 0.97 ± 0.06 0.29 0.33 [31] LTN 1.37 ± 0.06 0.59 0.33 [30] 1.70 ± 0.09 0.29 0.33 [30] Impeller…”

“…RT + 1PBD 3.10 ± 0.09 0.59 0.33 [30] 3.15 ± 0.05 0.29 0.33 [30] 3.01 ± 0.06 0.59 0.25 [31] 3.10 ± 0.09 0.59 0.33 [31] 2.99 ± 0.01 0.59 0.40 [31] 3.22 ± 0.01 0.59 0.46 [31] 3.15 ± 0.05 0.29 0.33 [31] RT + 2PBD 2.60 ± 0.02 0.59 0.33 [30] 2.70 ± 0.05 0.29 0.33 [30] 2.45 ± 0.01 0.59 0.25 [31] 2.60 ± 0.02 0.59 0.33 [31] 2.50 ± 0.02 0.59 0.40 [31] 2.69 ± 0.01 0.59 0.46 [31] 2.70 ± 0.05 0.29 0.33 [31] RT + 1TXD 2.85 ± 0.07 0.59 0.33 [30] 2.47 ± 0.04 0.29 0.33 [30] 3.14 ± 0.01 0.59 0.25 [31] 2.85 ± 0.07 0.59 0.33 [31] 3.19 ± 0.01 0.59 0.40 [31] 3.16 ± 0.06 0.59 0.46 [31] 2.47 ± 0.04 0.29 0.33 [31] RT + 2TXD 2.25 ± 0.02 0.59 0.33 [30] 2.06 ± 0.08 0.29 0.33 [30] 2.56 ± 0.03 0.59 0.25 [31] 2.25 ± 0.02 0.59 0.33 [31] 2.46 ± 0.01 0.59 0.40 [31] 2.48 ± 0.05 0.59 0.46 [31] 2.06 ± 0.08 0.29 0.33 [31] RT + 1LTN 3.21 ± 0.05 0.59 0.33 [30] 3.31 ± 0.07 0.29 0.33 [30] RT + 2LTN 2.62 ± 0.01 0.59 0.33 [30] 2.76 ± 0.13 0.29 0.33 [30]…”

Upscale fermenter design for lactic acid production from cheese whey permeate focusing on impeller selection and energy optimization

“…4 . It is generally assumed that power dissipated by a multiple stage Rushton turbine with optimal space results in the sum of power dissipated by a single impeller (Petříček et al 2018 ). Subsequently, the power required was doubled and tripled due to the usage of a two-stage and three-stage Rushton turbine system, respectively.…”

“…Moreover, six different impeller types were selected combining five different agitation speed to design a suitable impeller type and speed for an industrial scale fermenter. The selected impeller types (Rushton turbine blade (RTB), Lightnin A310 three blade hydrofoil (LA310), Lightnin A315 four-blade hydrofoil (LA315), concave blade turbine (CBT), pitched blade turbine (PBT) and Marine propeller (MP)) are widely employed for mixing the fermentation liquids (Markopoulos and Pantuflas 2001 ; Stitt and Simmons 2011 ; Petříček et al 2018 ). The selected agitation speeds (0.83, 1.33.…”

Power Consumption Prediction in a Viscous Liquid in Mechanically Agitated Gas‐Liquid Reactors

“…In recent years, our research group focused on the description of power consumption in coalescent batch 7, non‐coalescent batch 8, and in the viscous batch 9 of about 10 mPa s. Here, the aimis to enhance the database for power consumption prediction by adding the data for the batch viscosity of about 5 mPa s and also by adding the new parameter D / T .…”