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2 edition of Gas-liquid mixing in stirred vessels found in the catalog.

Gas-liquid mixing in stirred vessels

H. P. Grau

Gas-liquid mixing in stirred vessels

measurements of local surface disengagement

by H. P. Grau

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Published by UMIST in Manchester .
Written in English


Edition Notes

StatementH. P. Grau ; supervised by R. Mann.
ContributionsMann, R., Chemical Engineering.
ID Numbers
Open LibraryOL17266907M

In industrial process engineering, mixing is a unit operation that involves manipulation of a heterogeneous physical system with the intent to make it more ar examples include pumping of the water in a swimming pool to homogenize the water temperature, and the stirring of pancake batter to eliminate lumps (deagglomeration). Mixing is performed to allow heat and/or mass.   The obtained results clearly show several advantages of the LSB agitator in gas‐liquid mass transfer with respect to the agitators in the literature. It is found that its gas‐liquid volumetric mass‐transfer coefficient at a given specific power can be several times .

Our cheapest price for Handbook of Industrial Mixing: Science and Practice is $ Free shipping on all orders over $ The mixing of miscible liquids with large differences in density and viscosity.- Power input and gas hold up in gas liquid dispersions agitated by axial flow impellers.- Improving Xanthan fermentation performance by changing agitators.- Determination of the mean specific power input in stirred vessels with suspensions.-Price: $

Advances in Industrial Mixing is a companion volume and update to the Handbook of Industrial Mixing. The second volume fills in gaps for a number of industries that were not covered in the first edition. Significant changes in five of the fundamental areas are covered in entirely updated or new : $ The variation of flow pattern and mixing time with impeller spacing in stirred vessels with two Rushton impellers.- Development of transitional flow mixing impeller.- Distribution of turbulence characteristics in agitated systems with axial high-speed impeller and baffles


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Gas-liquid mixing in stirred vessels by H. P. Grau Download PDF EPUB FB2

Liquid-liquid mixing in stirred vessels: A review. gas-liquid dispersion 2,4,5, heat transfer 6 and solid suspension 7. Power input is associated also with shear stress, which can.

This chapter concentrates on gas–liquid mixing in stirred vessels and static mixers operating in the turbulent regime. The emphasis is on practical applications based on the fundamentals as much as possible.

It encompasses ranges of application of industrial interest, including:Cited by: Study of gas–liquid mixing in stirred vessel using electrical resistance tomography Article (PDF Available) in Asia-Pacific Journal of Chemical Engineering May with Reads.

These results in 3-D Gas-liquid mixing in stirred vessels book be useful for validating CFD models for gas–liquid mixing in stirred vessels. Acknowledgements The authors gratefully acknowledge support from EPSRC under the Foresight Programme GR/L ‘Process Tomography: A New Dimension in Advanced Sensor Technology’.Cited by: other hand, mixing time determines the time at which the whole of the tank is perfectly mixed or when the system reaches uniformity.

Generally, the mean circulation time is significantly shorter than mixing time in a tank (Jakobsen, ). For example, mixing time for a single-phase liquid in a stirred vessel is approximately four times theCited by: The range of mixers available for such diverse duties is dealt with, including tumbler mixers for powders, mechanically agitated vessels, in-line continuous mixers and jet mixers.

Coverage is given of the range of mixing objectives, varying from achieving product uniformity to obtaining optimum conditions for mass transfer and chemical reactions. A chemical engineer by training, her interest in mixing research stemmed from her PhD study back in – at the University of Birmingham, in the area of multiphase mixing in stirred vessels.

She has been instrumental in keeping mixing research going at UM, with particular interest in solid-liquid mixing, while more recent projects are. A chemical engineer by training, her interest in mixing research stemmed from her PhD study back in – at the University of Birmingham in the area of multiphase mixing in stirred vessels.

She has been instrumental in keeping mixing research going at the University of Malaya, with particular interest in solid-liquid mixing. Liquid Mixing in Agitated Vessels To express the degree of mixing in a stirred vessel, an expression is desirable to show how far the state of mixing deviates from the ideal complete mixing.

The most simple and popular index used in mixing studies is so called mixing time. Figure shows the process of mixing in a stirred vessel. Mixing Patterns 7 DESIGN OF GAS-LIQUID STIRRED VESSELS (Re > ONLY) Recommendations Design Procedure Mass Transfer 8 DESIGN OF GAS-LIQUID STATIC MIXERS Recommendations Design Procedure 9 NOMENCLATURE TABLE 1 COMPARISON OF DIFFERENT GAS-LIQUID.

CFD applications and mixing models in reactors is not yet available (Van den AkkerOchieng et al. ), which is the focus of this review.

This review provides an insight into different approaches used in simulating multiphase fl ow and different terms of momentum balances applied. The published literature on the liquid-phase mixing in a turbulent flow regime has been critically reviewed and analyzed.

Experimental techniques for mixing time have been described together with their relative merits. The effects of the impeller design (blade number, blade angle, blade and disk dimensions, and blade shape), the location of the impeller (off-bottom clearance, distance from the.

Gas liquid mixing, hydrodynamics, mass transfer, tomography, stirred vessel, baffles, and process economics. Introduction From customarily unit operations, mixing is one of the most important process used in engineering and allied industries, which plays an important role in the commercial success of industrial operations.

Summary This chapter contains sections titled: Introduction Flow Regimes Variations Spargers Impellers Baffles Power Requirements Gas Fraction Mass Transfer Mixing Times Questions References Sparged Stirred Vessels - Hydrodynamics of Gas‐Liquid Reactors - Wiley Online Library.

Liquid-liquid mixing Scaling of drop size with turbulence – Hinze and Davies Phase inversion, high shear mixers Case Study: Liquid-liquid emulsion Gas-liquid mixing – mixer power vs compressor power Bubble break-up, power consumption, gas-liquid mass transfer Design and application of mixing test vessels – turbulent scaling vs local mixing 6.

Inline mixing of gases and liquids and liquids is a critical Inline rotor/stator mixer Static mixers. Mixing gases into liquids. Gas-liquid mixtures are standard in chemical and biological process technologies. A typical purpose is to produce a chemical reaction or provide mass transfer between the two phases.

Handbook of Industrial Mixing will explain the difference and uses of a variety of mixers including gear mixers, top entry mixers, side entry mixers, bottom entry mixers, on-line mixers, and submerged mixers The Handbook discusses the trade-offs among various mixers, concentrating on which might be considered for a particular process.

In this book the section on Modelling contains papers which focus on the representation of the mixing process, whether by equation, scale-up criteria, or fluid dynamic simulation.

Similarly, Mixing Operations are concerned with the application or function of the mixing. Agitation is a means whereby mixing of phases can be accomplished and by which mass and heat transfer can be enhanced between phases or with external surfaces. In its most general sense, the process of mixing is concerned with all combinations of phases like Gas, Liquid, solid.

It is the heart of the chemical industry. other hand, mixing time determines the time at which the whole of the tank is per- fectly mixed or when the system reaches uniformity. Generally, the mean circulation time is significantly shorter than mixing time in a tank (Jakobsen, ).

For example, mixing time for a single-phase liquid in a stirred vessel is approximately four times the. This study presents a full operation and optimisation of a mixing unit; an innovative approach is developed to address the behaviour of gas-liquid mixing by using Electrical Resistance Tomography (ERT).

The validity of the method is investigated by developing the tomographic images using different numbers of baffles in a mixing unit. This technique provided clear visual evidence of better.Advances in Industrial Mixing is a companion volume and update to the Handbook of Industrial Mixing. The second volume fills in gaps for a number of industries that were not covered in the first edition.

Significant changes in five of the fundamental areas are covered in entirely updated or new chapters. The original text is provided as a searchable pdf file on the accompanying USB.Mixing Vessel Paul Mueller Company’s mixing vessels are designed and crafted to handle the unique demands of a variety of products.

We offer several types of impellers including completely customized designs to suit very unique applications and mixing solutions.