Suspension of high concentration solids in a pilot scale jet-flow high shear mixer

Liu, Yudong; Zhang, Yixia; Guo, Junheng; Li, Wei; Zhou, Mingliang; Zhang, Jinli

doi:10.1016/j.cej.2022.138567

Cited by 4 publications

(4 citation statements)

References 50 publications

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“…Based on the Zwietering criteria, Liu and his team developed and proposed the correlation. It only applies to a pilot-scale jet-flow high-shear mixer with a high solid concentration of up to 40% by weight.…”

Section: Literature Reviewmentioning

confidence: 99%

See 1 more Smart Citation

Novel Correlation for Critical Speed for Solid Suspension in Stirred Tanks Developed Using Machine Learning Models Trained on Literature Data

Joshi

Dalvi

Vitankar³

et al. 2023

Ind. Eng. Chem. Res.

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Critical speed for solid suspension (N js ) in stirred tanks is an important design parameter in several chemical processes. There is a need to develop a generalized correlation that applies to a broad range of literature data. Also, the literature lacks a comparative study of different machine learning (ML) models for the prediction of N js . In this paper, 3240 data points have been extracted from 35 papers on solid suspension and N js has been modeled as the dependent variable, initially using ML models. Three ML models (random forest regression (RF), CatBoost regression (CatB), and artificial neural network regression (ANN)) are compared. The CatB model was the most effective, resulting in R 2 = 0.99 for the testing dataset, better than any empirical correlation published. Further, we have successfully used the CatB model to obtain the functional form of the behavior of various parameters. We then developed novel correlations (in closed form and with parametric uncertainty) for HE-3, PTD, and DT impellers with R 2 = 0.89, 0.84, and 0.86, respectively, where the correlation constants were tuned using experimental data published in the literature. Our closed-form correlations significantly outperform earlier correlations published in the literature. Such a methodology has not been reported in the literature we have surveyed, and we believe that it is novel and original.

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Section: Literature Reviewmentioning

confidence: 99%

“…It is observed that these correlations (Table , eqs and and their improvements ,, ) are very system-specific (type, size, and location of the impeller, baffled or unbaffled, ranges of solid–liquid properties, geometry of tank bottom, etc.) and cannot be used generally.…”

Section: Literature Reviewmentioning

confidence: 99%

Novel Correlation for Critical Speed for Solid Suspension in Stirred Tanks Developed Using Machine Learning Models Trained on Literature Data

Joshi

Dalvi

Vitankar³

et al. 2023

Ind. Eng. Chem. Res.

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“…In order to further improve the removal efficiency, researchers [4][5][6] have studied the principle of gas-liquid mass transfer in RPB in detail from various angles. First, ozone is used to oxidize NO, and then nitric acid is used as the absorption liquid to achieve 90% denitration rate in RPB.…”

Section: Introductionmentioning

confidence: 99%

Establishment and analysis of denitrification model of multistage high gravity machine based on Fluent

Zhang

2023

Third International Conference on Mechanical, Electronics, and Electrical and Automation Control (METMS 2023)

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Three-dimensional numerical simulation of two-phase flow (H2O2 solution, NO2) was carried out on the packed rotor inside the multistage high gravity machine by using Fluent software. At the same time, the chemical reaction process of H2O2 solution and NO2 was added to realize the simulation of the denitrification process. Orthogonal experiments were designed to study the influence of rotating speed, gas-liquid ratio, temperature, and H2O2 solution concentration on the denitrification efficiency, and the combination of experimental conditions with the best denitrification efficiency was obtained. The simulation results show that the order of effect on removal efficiency is: rotating speed

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“…Therefore, experts and scholars have turned their attention to the wet absorption method. Researchers [8]~ [10] have studied the principle of gas-liquid mass transfer in RPB in detail. After using ozone to oxidize NO, nitric acid is used as the absorption liquid, and the denitration in RPB reaches 90%.…”

Section: Introductionmentioning

confidence: 99%

Study on flue gas denitration method based on multistage high gravity technology

Zhang

2023

E3S Web Conf.

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According to the mechanism of wet denitration, H2O2 solution and KOH solution are used as absorbents, and the two-stage countercurrent high-gravity rotating packed bed is used as the reaction equipment. The rotating speed, gas-liquid ratio, temperature, H2O2 solution concentration and KOH solution concentration are changed respectively to explore the impact of various factors on the denitration efficiency, and finally determine the best experimental conditions for flue gas denitration. The experimental results show that when the rotating speed reaches 900 rpm, the gas-liquid ratio is 12:1, and the temperature reaches 36 °C, using 0.20 mol/l of H2O2 solution and 0.10 mol/l of KOH solution as absorbents, the denitration efficiency can reach the best, and the best denitration efficiency is 95.71%.

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Suspension of high concentration solids in a pilot scale jet-flow high shear mixer

Cited by 4 publications

References 50 publications

Novel Correlation for Critical Speed for Solid Suspension in Stirred Tanks Developed Using Machine Learning Models Trained on Literature Data

Novel Correlation for Critical Speed for Solid Suspension in Stirred Tanks Developed Using Machine Learning Models Trained on Literature Data

Establishment and analysis of denitrification model of multistage high gravity machine based on Fluent

Study on flue gas denitration method based on multistage high gravity technology

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