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Author : R. Van Ommen
Publisher : Delft University Press
ISBN 13 : 9789040722288
Total Pages : 222 pages
Book Rating : 4.7/5 (222 download)
Download or read book Monitoring Fluidized Bed Hydrodynamics written by R. Van Ommen and published by Delft University Press. This book was released on 2001-01-01 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Ruud van Ommen
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (17 download)
Download or read book Monitoring Fluidized Bed Hydrodynamics written by Ruud van Ommen and published by . This book was released on 2001 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Monitoring Fluidized Bed Dryer Hydrodynamics Using Pressure Fluctuations and Electrical Capacitance Tomography written by and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Monitoring Fluidized Bed Dryer Hydrodynamics Using Pressure Fluctuations and Electrical Capacitance Tomography written by and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : D. Kunii
Publisher : Elsevier
ISBN 13 : 008050664X
Total Pages : 520 pages
Book Rating : 4.0/5 (85 download)
Download or read book Fluidization Engineering written by D. Kunii and published by Elsevier. This book was released on 2013-10-22 with total page 520 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fluidization Engineering, Second Edition, expands on its original scope to encompass these new areas and introduces reactor models specifically for these contacting regimes. Completely revised and updated, it is essentially a new book. Its aim is to distill from the thousands of studies those particular developments that are pertinent for the engineer concerned with predictive methods, for the designer, and for the user and potential user of fluidized beds. Covers the recent advances in the field of fluidization. Presents the studies of developments necessary to the engineers, designers, and users of fluidized beds.
Author : John R. Grace
Publisher : John Wiley & Sons
ISBN 13 : 3527699473
Total Pages : 632 pages
Book Rating : 4.5/5 (276 download)
Download or read book Essentials of Fluidization Technology written by John R. Grace and published by John Wiley & Sons. This book was released on 2020-03-11 with total page 632 pages. Available in PDF, EPUB and Kindle. Book excerpt: A concise and clear treatment of the fundamentals of fluidization, with a view to its applications in the process and energy industries.
Author : David Kent Casleton
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (324 download)
Download or read book Image Analysis of Circulating Fluidized Bed Hydrodynamics written by David Kent Casleton and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Martin R Dis Li
Publisher : Sudwestdeutscher Verlag Fur Hochschulschriften AG
ISBN 13 : 9783838133218
Total Pages : 372 pages
Book Rating : 4.1/5 (332 download)
Download or read book Bubbling Fluidized Bed Hydrodynamics written by Martin R Dis Li and published by Sudwestdeutscher Verlag Fur Hochschulschriften AG. This book was released on 2012-05 with total page 372 pages. Available in PDF, EPUB and Kindle. Book excerpt: Rising gas bubbles in bubbling fluidized beds are important for all hydrodynamics related phenomena, e.g. mass transfer, gas bypassing, heat transfer, gas-solids mixing, etc. However, still many interactions of bubbles with specific operation conditions in fluidized beds are unknown. In this work, fluidized beds with vertical heat exchangers are investigated. Vertical heat exchangers are in this case used to remove the heat of reaction from the exothermal methanation reaction for the production of synthetic natural gas (SNG) from wood. Several vertical tube bank configurations varying in their diameter, tube-to-tube spacing, and arrangement (square vs. triangular) have been immersed into a lab-scale fluidized bed. By means of optical probing and pressure fluctuation measurements, their influence on the rising gas bubbles has been evaluated by means of statistical tools. Findings from these experiments are furthermore used to develop a modified approach to scale up fluidized beds with vertical internals.
Author : Maryam Mohagheghi Dar Ranji
Publisher :
ISBN 13 :
Total Pages : 438 pages
Book Rating : 4.:/5 (16 download)
Download or read book Impact of Local Fluidized Bed Hydrodynamics on Jet-bed Interaction written by Maryam Mohagheghi Dar Ranji and published by . This book was released on 2014 with total page 438 pages. Available in PDF, EPUB and Kindle. Book excerpt: In Fluid CokingTM or Fluid Catalytic Cracking liquid feedstocks are injected into a bed of fluidized particles. Uniform distribution of liquid feed on fluidized particles increases the yield of valuable products and improves operability in these processes. Contact between the injected liquid and the bed particles can be greatly affected by the liquid properties and local bed hydrodynamics. The impact of parameters such as liquid properties, fluidization velocity, nozzle atomization gas flowrate, nozzle location and inclination were investigated on the distribution of liquid sprayed into a fluidized bed with a reliable and fast response capacitance meter. This method was also extended to monitor the agglomerate breakup kinetics. The research showed that a liquid whose viscosity and contact angle on the surface of solid particles are similar to the liquid used in the high temperature commercial reactors provides a good simulation of liquid distribution into a fluidized bed with room temperature experiments. VarsolTM was selected for a cold simulation of Fluid CokersTM. The research also presents an innovative design of a cold model fluidized bed to investigate the impact of the velocity of particles, relative to the spray nozzle, on solidliquid contact since it varies greatly with location in actual Fluid Cokers. This design provided an inexpensive and accessible means to study the effect of the relative velocity between the spray jet and particles independently of other bed hydrodynamic characteristics. The investigation found that distribution of the injected liquid in the bed can be improved by either increasing the atomization gas flowrate or, preferably, the fluidization velocity. Study of nozzles at different locations and inclinations identified the dominant effects of bed hydrodynamics at the nozzle and jet tips on the distribution of liquid on solid particles. A model for the interactions between sprayed liquid and fluidized particles was developed for two cases: a) a stationary spray nozzle and no net motion of the fluidized solids and b) a moving nozzle with a relative velocity between spray nozzle and particles. The model results were compared with experimental results and were found to provide consistent information on the liquid concentration of the agglomerates.
Author : Abdelsalam Efhaima
Publisher :
ISBN 13 :
Total Pages : 262 pages
Book Rating : 4.:/5 (952 download)
Download or read book Scale-up Investigation and Hydrodynamics Study of Gas-solid Fluidized Bed Reactor Using Advanced Non-invasive Measurement Techniques written by Abdelsalam Efhaima and published by . This book was released on 2016 with total page 262 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This research focuses on validating our newly developed mechanistic scale-up methodology for hydrodynamics similarity of gas-solid fluidized bed reactors (FBRs) by implementing our advanced non-invasive measurement techniques which are gamma ray computed tomography (CT) and radioactive particle tracking (RPT) that measure local hydrodynamic parameters. Experiments were carried out in two fluidized beds of 14 cm and 44 cm in diameter using air as the gas phase and particles of different materials. Since in these reactors the gas dynamic dictates the bed hydrodynamics, the new mechanistic scale-up methodology is based on maintaining similar or closer time averaged radial profiles of gas holdups at a height within the bed in two different gas-solid fluidized beds in order to achieve local and global similarity of dimensionless hydrodynamic parameters. The findings validate the achievement of hydrodynamics similarity in local solids and gas holdups distribution obtained by CT technique and in three dimension local solids velocities, solids shear stresses, normal stresses, turbulent kinetic energy, and turbulent eddy diffusivities measured by RPT technique. Also in this work we found based on local hydrodynamic parameters obtained by using CT and RPT that the scale-up method of matching a set of dimensionless groups is invalid for hydrodynamics similarity and the proposed dimensionless groups are insufficient to capture the key phenomena in these reactors. In addition, we studied the effect of bed height and particles type, size, and density on gas holdup, particle velocity, and turbulent parameters measured by these advanced techniques"--Abstract, page iv.
Author : C. K. Gupta
Publisher : CRC Press
ISBN 13 : 9781420049862
Total Pages : 526 pages
Book Rating : 4.0/5 (498 download)
Download or read book Fluid Bed Technology in Materials Processing written by C. K. Gupta and published by CRC Press. This book was released on 1998-12-28 with total page 526 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fluid Bed Technology in Materials Processing comprehensively covers the various aspects of fluidization engineering and presents an elaborate examination of the applications in a multitude of materials processing techniques. This singular resource discusses: All the basic aspects of fluidization essential to understand and learn about various techniques The range of industrial applications Several examples in extraction and process metallurgy Fluidization in nuclear engineering and nuclear fuel cycle with numerous examples Innovative techniques and several advanced concepts of fluidization engineering, including use and applications in materials processing as well as environmental and bio-engineering Pros and cons of various fluidization equipment and specialty of their applications, including several examples Design aspects and modeling Topics related to distributors effects and flow regimes A separate chapter outlines the importance of fluidization engineering in high temperature processing, including an analysis of the fundamental concepts and applications of high temperature fluidized bed furnaces for several advanced materials processing techniques. Presenting information usually not available in a single source, Fluid Bed Technology in Materials Processing serves Fluidization engineers Practicing engineers in process metallurgy, mineral engineering, and chemical metallurgy Researchers in the field of chemical, metallurgical, nuclear, biological, environmental engineering Energy engineering professionals High temperature scientists and engineers Students and professionals who adopt modeling of fluidization in their venture for design and scale up
Author : Per Olowson
Publisher :
ISBN 13 : 9789170326561
Total Pages : 51 pages
Book Rating : 4.3/5 (265 download)
Download or read book Hydrodynamics of a fluidized bed written by Per Olowson and published by . This book was released on 1992 with total page 51 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Robert W. Lyczkowski
Publisher : Springer Science & Business Media
ISBN 13 : 1461435919
Total Pages : 88 pages
Book Rating : 4.4/5 (614 download)
Download or read book Thermo-Hydrodynamic Design of Fluidized Bed Combustors written by Robert W. Lyczkowski and published by Springer Science & Business Media. This book was released on 2012-04-05 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt: Thermo-Hydrodynamic Design of Fluidized Bed Combustors: Estimating Metal Wastage is a unique volume that finds that the most sensitive parameters affecting metal wastage are superficial fluidizing velocity, particle diameter, and particle sphericity. Gross consistencies between disparate data sources using different techniques were found when the erosion rates are compared on the same basis using the concept of renormalization. The simplified mechanistic models and correlations, when validated, can be used to renormalize any experimental data so they can be compared on a consistent basis using a master equation.
Author : Faraj Muftah Zaid
Publisher :
ISBN 13 :
Total Pages : 448 pages
Book Rating : 4.:/5 (86 download)
Download or read book Gas-solid Fluidized Bed Reactors: Scale-up, Flow Regimes Identification and Hydrodynamics written by Faraj Muftah Zaid and published by . This book was released on 2013 with total page 448 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This research studied the scale-up, flow regimes identification and hydrodynamics of fluidized beds using 6-inch and 18- inch diameter columns and different particles. One of the objectives was to advance the scale-up of gas-solid fluidized bed reactors by developing a new mechanistic methodology for hydrodynamic similarity based on matching the radial or diameter profile of gas phase holdup, since gas dynamics dictate the hydrodynamics of these reactors. This has been successfully achieved. However, the literature reported scale-up methodology based on matching selected dimensionless groups was examined and it was found that it was not easy to match the dimensionless groups and hence, there was some deviation in the hydrodynamics of the studied two different fluidized beds. A new technique based on gamma ray densitometry (GRD) was successfully developed and utilized to on-line monitor the implementation of scale-up, to identify the flow regime, and to measure the radial or diameter profiles of gas and solids holdups. CFD has been demonstrated as a valuable tool to enable the implementation of the newly developed scale-up methodology based on finding the conditions that provide similar or closer radial profile or cross sectional distribution of the gas holdup. As gas velocity increases, solids holdup in the center region of the column decreases in the fully developed region of both 6 inch and 18 inch diameter columns. Solids holdup increased with the increase in the particles size and density. Upflowing particles velocity increased with the gas velocity and became steeper at high superficial gas velocity at all axial heights where the center line velocity became higher than that in the wall region. Smaller particles size and lower density gave larger upflowing particles velocity. Minimum fluidization velocity and transition velocity from bubbly to chum turbulent flow regimes were found to be lower in 18 inch diameter column compared to those obtained in 6 inch diameter column. Also the absolute fluctuation of upflowing particles velocity multiplied by solids holdups as one of the terms for solids mass flux estimation was found to be larger in 18-inch diameter column than that in 6-inch diameter column using same particles size and density"--Abstract, leaf iii.
Author : Ethan James Brue
Publisher :
ISBN 13 :
Total Pages : 296 pages
Book Rating : 4.:/5 (37 download)
Download or read book Process Model Identification of Circulating Fluidized Bed Hydrodynamics written by Ethan James Brue and published by . This book was released on 1994 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : P. M. Laussmann
Publisher :
ISBN 13 :
Total Pages : 201 pages
Book Rating : 4.:/5 (117 download)
Download or read book Hydrodynamics of Circulating Fluidized Beds written by P. M. Laussmann and published by . This book was released on 1990 with total page 201 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Bench-scale Two-dimensional Fluidized Bed Hydrodynamics and Struvite Growth Studies written by and published by . This book was released on 2002 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A bench-scale, two-dimensional multi-compartmentalized fluidized reactor was designed and studies of hydrodynamic behavior of fluidization of struvite pellets were performed. Also size growth distribution tests were analyzed qualitatively. The study validated a previously-proposed theory, concerning the relationship between dynamic pressure drop and upflow velocity as well the experimental protocol to determine the minimum fluidization velocity. Findings indicated that the mixture of two-sized particles would behave rather independently of each other, before the bed expansion. It was suggested that bed height measurement could be another promising method to pinpoint minimum fluidization velocity as there is a sharp bed surface "waking episode" during the process of a packed bed being gradually fluidized. Bed expansion equations for the prediction of void fraction as a function of superficial upflow velocity or vice versa, have been established for 4 groups of monosize particles, as well as two mixtures of two-sized particles. The equation constants did not agree well with previously established ones. The two layers of segregated mixture bed had congruent linear relationships between the logarithmic void fraction and logarithmic upflow velocity. It was found that a mixture does not always go through segregation, but only when the size difference is large enough. Size growth distribution tests were performed under different hydrodynamic configurations as well as seeding conditions. Conclusions can be made that a bed with uniformly- distributed particle void fractions and higher mixing energy input (upflow velocity), normally has better performance of struvite growth in size.
