Mass Transfer Characteristics by Surface Aeration of Large Paddle Impeller: Application to a Polymerization Reactor with Liquid Level Change

Yatomi, Ryuichi; Takenaka, Katsuhide; Takahashi, Koji; Tanguy, Philippe A.

doi:10.1252/jcej.40.393

Cited by 6 publications

(3 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The occurring oxygen transfer mechanism in the entirely liquid (water) body is the two-film theory [3]. The oxygen transfer in the water body is related to many parameters, such as water level, tank and impeller geometry, rotation speed, the number of impellers, and many operational conditions [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Oxygen Mass Transfer in an Aerated Stirred Tank with Double Impellers: A Generalized Correlation Including Spacing Impact

Issa

2016

International Journal of Chemical Engineering

View full text Add to dashboard Cite

Stirred aerated tanks by double impellers are used in fermentation and various biological processes for water treatment, food industry, and pharmaceutical production. In this study, a generalized correlation model was developed for the dependent parameter (kla/N). The oxygen mass transfer from air to liquid takes place by rotating the double impellers (IBRC and PBPU) in the aerated tank. This model considers Reynolds number, Froude number, power number, the liquid height, and the spacing between impellers as the most significant specifications that are related to aerated tank performance. The spacing between the impellers is considered to be a design factor of such industrial equipment due to its remarkable impact on the oxygen mass transfer.

show abstract

Section: Introductionmentioning

confidence: 99%

Oxygen Mass Transfer in an Aerated Stirred Tank with Double Impellers: A Generalized Correlation Including Spacing Impact

Issa

2016

International Journal of Chemical Engineering

View full text Add to dashboard Cite

show abstract

“…The uniform shear and efficiency of the Maxblend impeller has already been highlighted in a series of articles. − This combination of Maxblend impeller and double helical ribbon is proposed to be very efficient in deep laminar regime mixing because both impellers have good pumping capacities with highly viscous fluids. The coaxial mixer in both configurations performs better than the dual shaft mixer.…”

Section: Resultsmentioning

confidence: 99%

Analysis of Power Consumption in Multishaft Mixers

Wang

Farhat

Fradette

et al. 2014

Ind. Eng. Chem. Res.

Self Cite

View full text Add to dashboard Cite

New definitions of the Reynolds and power numbers proposed by Farhat, Fradette, and Tanguy (2008) for coaxial mixers were discussed and extended to some other types of multishaft mixers not considered previously. The results confirmed that these new correlations are also applicable for the dual shaft mixer configurations and the Superblend mixer. This universal applicability allowed the authors to experimentally investigate and compare the power consumption and the mixing time in the coaxial, the dual shaft, and the Superblend mixers based on uniform criteria. It was found that the Mixel TT−Anchor combination is the most power-efficient combination, whereas the Superblend mixer requires the most power. Besides, a general approach was introduced to predict the power constant of these multishaft mixers. Finally, the limitations of the new correlations were pointed out through the extension study of their applicability in Superblend and Rotor Stator−Paravisc dual shaft mixer.

show abstract

“…In recent years, several large-paddle impellers, including Maxblend (MB), Fullzone (FZ), Supermix MR205 (MR205), Sammeler (SM), Hi-F mixer (HiF), and Bendleaf (BL), were developed by Japanese companies [1][2][3]. ese impellers are very useful under a wide range of Reynolds numbers.…”

Section: Introductionmentioning

confidence: 99%

Development of a Mixing Process Using an HB-Type Impeller to Easily Achieve Scale-Up by Maintaining Geometrical Similarity

Kato

Furukawa

Ikeda

et al. 2018

International Journal of Chemical Engineering

View full text Add to dashboard Cite

In recent years, a novel home base-type (HB-type) impeller was developed to be based on observation of the streak line pattern. An HB impeller must be simple, speedy, and stable (3S). When an HB impeller is used on the laboratory beaker scale, the mixing performance of the HB impeller is better than that of a normal cylindrical stirring bar. In addition, an industrial-scale HB impeller has been constructed based on the observation of the streak line and isolated mixing regions in the vessel. e present authors believe that scale-up of the mixing process is very easy because the geometrical shape of the impeller can be kept consistent when scaling up from the laboratory scale to the industrial scale.

show abstract

Mass Transfer Characteristics by Surface Aeration of Large Paddle Impeller: Application to a Polymerization Reactor with Liquid Level Change

Cited by 6 publications

References 5 publications

Oxygen Mass Transfer in an Aerated Stirred Tank with Double Impellers: A Generalized Correlation Including Spacing Impact

Oxygen Mass Transfer in an Aerated Stirred Tank with Double Impellers: A Generalized Correlation Including Spacing Impact

Analysis of Power Consumption in Multishaft Mixers

Development of a Mixing Process Using an HB-Type Impeller to Easily Achieve Scale-Up by Maintaining Geometrical Similarity

Contact Info

Product

Resources

About