Determination of the solid concentration in a binary mixture from pressure drop measurements
A new and simple method to estimate the concentration of solids in a binary solids mixture is proposed and experimentally tested in a small fluidized bed set up. In the proposed method, it is necessary to measure the pressure drop in different sections of the bed at different gas velocities so as to be able to determine local minimum fluidization velocities using the Ergun equation. Because the minimum fluidization velocity of a solids mixture is known to be dependent on its weight fraction, a calibration curve can be derived by means of the Cheung equation and this is shown to be sufficient to obtain reasonably good estimates of the axial solids concentration profiles inside the bed. This methodology has been applied to three different mixtures of iron oxide ore of varying size with limestone or glass spheres. Satisfactory agreement between the experimental and calculated concentrations as well as pooled relative standard deviations lower than ±7%, are obtained in all three cases. This technique could facilitate future experimental research on solids mixing and segregation phenomena in fluidized beds, as it is a very low-cost, non-destructive and very fast method to determine solids concentration bed profiles.
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Language: | English |
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Elsevier
2019-07-18
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Subjects: | Fluidization, Mixing, Segregation, Solids concentration, Calibration, |
Online Access: | http://hdl.handle.net/10261/189644 http://dx.doi.org/10.13039/501100003329 |
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dig-incar-es-10261-1896442020-07-19T04:31:23Z Determination of the solid concentration in a binary mixture from pressure drop measurements Turrado Fernández, Sandra Fernández García, José Ramón Abanades García, Juan Carlos Ministerio de Economía y Competitividad (España) Fernández García, José Ramón [0000-0001-9801-7043] Abanades Garcia, Juan Carlos [0000-0003-1711-6993] Fluidization Mixing Segregation Solids concentration Calibration A new and simple method to estimate the concentration of solids in a binary solids mixture is proposed and experimentally tested in a small fluidized bed set up. In the proposed method, it is necessary to measure the pressure drop in different sections of the bed at different gas velocities so as to be able to determine local minimum fluidization velocities using the Ergun equation. Because the minimum fluidization velocity of a solids mixture is known to be dependent on its weight fraction, a calibration curve can be derived by means of the Cheung equation and this is shown to be sufficient to obtain reasonably good estimates of the axial solids concentration profiles inside the bed. This methodology has been applied to three different mixtures of iron oxide ore of varying size with limestone or glass spheres. Satisfactory agreement between the experimental and calculated concentrations as well as pooled relative standard deviations lower than ±7%, are obtained in all three cases. This technique could facilitate future experimental research on solids mixing and segregation phenomena in fluidized beds, as it is a very low-cost, non-destructive and very fast method to determine solids concentration bed profiles. The authors acknowledge the financial support received from the Spanish Ministry of Economy, Industry and Competitivity (ENE2015-68885-C2-1-R). Peer reviewed 2019-09-02T09:39:09Z 2019-09-02T09:39:09Z 2019-07-18 artículo http://purl.org/coar/resource_type/c_6501 Powder Technology 338: 608-613 (2018) 0032-5910 http://hdl.handle.net/10261/189644 10.1016/j.powtec.2018.07.057 1873-328X http://dx.doi.org/10.13039/501100003329 en #PLACEHOLDER_PARENT_METADATA_VALUE# info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/ENE2015-68885-C2-1-R Postprint https://doi.org/10.1016/j.powtec.2018.07.057 Sí open Elsevier |
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Fluidization Mixing Segregation Solids concentration Calibration Fluidization Mixing Segregation Solids concentration Calibration Turrado Fernández, Sandra Fernández García, José Ramón Abanades García, Juan Carlos Determination of the solid concentration in a binary mixture from pressure drop measurements |
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A new and simple method to estimate the concentration of solids in a binary solids mixture is proposed and experimentally tested in a small fluidized bed set up. In the proposed method, it is necessary to measure the pressure drop in different sections of the bed at different gas velocities so as to be able to determine local minimum fluidization velocities using the Ergun equation. Because the minimum fluidization velocity of a solids mixture is known to be dependent on its weight fraction, a calibration curve can be derived by means of the Cheung equation and this is shown to be sufficient to obtain reasonably good estimates of the axial solids concentration profiles inside the bed. This methodology has been applied to three different mixtures of iron oxide ore of varying size with limestone or glass spheres. Satisfactory agreement between the experimental and calculated concentrations as well as pooled relative standard deviations lower than ±7%, are obtained in all three cases. This technique could facilitate future experimental research on solids mixing and segregation phenomena in fluidized beds, as it is a very low-cost, non-destructive and very fast method to determine solids concentration bed profiles. |
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Ministerio de Economía y Competitividad (España) |
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Ministerio de Economía y Competitividad (España) Turrado Fernández, Sandra Fernández García, José Ramón Abanades García, Juan Carlos |
format |
artículo |
topic_facet |
Fluidization Mixing Segregation Solids concentration Calibration |
author |
Turrado Fernández, Sandra Fernández García, José Ramón Abanades García, Juan Carlos |
author_sort |
Turrado Fernández, Sandra |
title |
Determination of the solid concentration in a binary mixture from pressure drop measurements |
title_short |
Determination of the solid concentration in a binary mixture from pressure drop measurements |
title_full |
Determination of the solid concentration in a binary mixture from pressure drop measurements |
title_fullStr |
Determination of the solid concentration in a binary mixture from pressure drop measurements |
title_full_unstemmed |
Determination of the solid concentration in a binary mixture from pressure drop measurements |
title_sort |
determination of the solid concentration in a binary mixture from pressure drop measurements |
publisher |
Elsevier |
publishDate |
2019-07-18 |
url |
http://hdl.handle.net/10261/189644 http://dx.doi.org/10.13039/501100003329 |
work_keys_str_mv |
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1777669026481176576 |