Experimental Quantification of the Lateral Mixing of Binary Solids in Bubbling Fluidized Beds

A novel experimental method for the lateral mixing of binary solids in bubbling fluidized beds was developed based on the capacitance probe technique. The evolutions of local mixing ratios in a fluidized bed which can be assumed as one mixing cell were analyzed in detail. The solids mixing within on...

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Autores principales:	Huanan Li, Jikai Huang, Zhigang Liu, Mingming Lv, Can Ji
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	fluidized bed lateral solids mixing binary mixtures capacitance probe Technology T
Acceso en línea:	https://doaj.org/article/17191734c1474aa984e4f5ca8029b0c3
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spelling	oai:doaj.org-article:17191734c1474aa984e4f5ca8029b0c32021-11-25T17:28:50ZExperimental Quantification of the Lateral Mixing of Binary Solids in Bubbling Fluidized Beds10.3390/en142277961996-1073https://doaj.org/article/17191734c1474aa984e4f5ca8029b0c32021-11-01T00:00:00Zhttps://www.mdpi.com/1996-1073/14/22/7796https://doaj.org/toc/1996-1073A novel experimental method for the lateral mixing of binary solids in bubbling fluidized beds was developed based on the capacitance probe technique. The evolutions of local mixing ratios in a fluidized bed which can be assumed as one mixing cell were analyzed in detail. The solids mixing within one mixing cell was resolved and the effect of convection and diffusion mechanism on lateral mixing was evaluated individually. The results show that at lower part of the fluidized bed, convection plays a more important role in the mixing process near the wall; meanwhile, diffusion is very important for the mixing around the center line. This is opposite with that at the higher part. A lateral micro dispersion coefficient was proposed to characterize the lateral mixing within the mixing cell and the value is generally between 0.005 and 0.025 m/s. A new mixing index was proposed to evaluate the lateral mixing quality of binary solids. It was found that at the lower part of the fluidized bed, the best mixing is acquired at the half radius, whereas mixing at the center line is the worst. At the higher part, solid mixing is better when increasing the distance from the wall. The influences of gas velocity and static bed on the lateral mixing were also discussed from a microscopic perspective.Huanan LiJikai HuangZhigang LiuMingming LvCan JiMDPI AGarticlefluidized bedlateral solids mixingbinary mixturescapacitance probeTechnologyTENEnergies, Vol 14, Iss 7796, p 7796 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	fluidized bed lateral solids mixing binary mixtures capacitance probe Technology T
spellingShingle	fluidized bed lateral solids mixing binary mixtures capacitance probe Technology T Huanan Li Jikai Huang Zhigang Liu Mingming Lv Can Ji Experimental Quantification of the Lateral Mixing of Binary Solids in Bubbling Fluidized Beds
description	A novel experimental method for the lateral mixing of binary solids in bubbling fluidized beds was developed based on the capacitance probe technique. The evolutions of local mixing ratios in a fluidized bed which can be assumed as one mixing cell were analyzed in detail. The solids mixing within one mixing cell was resolved and the effect of convection and diffusion mechanism on lateral mixing was evaluated individually. The results show that at lower part of the fluidized bed, convection plays a more important role in the mixing process near the wall; meanwhile, diffusion is very important for the mixing around the center line. This is opposite with that at the higher part. A lateral micro dispersion coefficient was proposed to characterize the lateral mixing within the mixing cell and the value is generally between 0.005 and 0.025 m/s. A new mixing index was proposed to evaluate the lateral mixing quality of binary solids. It was found that at the lower part of the fluidized bed, the best mixing is acquired at the half radius, whereas mixing at the center line is the worst. At the higher part, solid mixing is better when increasing the distance from the wall. The influences of gas velocity and static bed on the lateral mixing were also discussed from a microscopic perspective.
format	article
author	Huanan Li Jikai Huang Zhigang Liu Mingming Lv Can Ji
author_facet	Huanan Li Jikai Huang Zhigang Liu Mingming Lv Can Ji
author_sort	Huanan Li
title	Experimental Quantification of the Lateral Mixing of Binary Solids in Bubbling Fluidized Beds
title_short	Experimental Quantification of the Lateral Mixing of Binary Solids in Bubbling Fluidized Beds
title_full	Experimental Quantification of the Lateral Mixing of Binary Solids in Bubbling Fluidized Beds
title_fullStr	Experimental Quantification of the Lateral Mixing of Binary Solids in Bubbling Fluidized Beds
title_full_unstemmed	Experimental Quantification of the Lateral Mixing of Binary Solids in Bubbling Fluidized Beds
title_sort	experimental quantification of the lateral mixing of binary solids in bubbling fluidized beds
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/17191734c1474aa984e4f5ca8029b0c3
work_keys_str_mv	AT huananli experimentalquantificationofthelateralmixingofbinarysolidsinbubblingfluidizedbeds AT jikaihuang experimentalquantificationofthelateralmixingofbinarysolidsinbubblingfluidizedbeds AT zhigangliu experimentalquantificationofthelateralmixingofbinarysolidsinbubblingfluidizedbeds AT mingminglv experimentalquantificationofthelateralmixingofbinarysolidsinbubblingfluidizedbeds AT canji experimentalquantificationofthelateralmixingofbinarysolidsinbubblingfluidizedbeds
_version_	1718412270666514432

Experimental Quantification of the Lateral Mixing of Binary Solids in Bubbling Fluidized Beds

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