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An experimental study of a volatiles distributor for solid fuels chemical-looping combustion process

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Názov: An experimental study of a volatiles distributor for solid fuels chemical-looping combustion process
Autori: Li, Xiaoyun, 1990, Lyngfelt, Anders, 1955, Mattisson, Tobias, 1970
Zdroj: Fördelning av flykt vid inmatning av fasta bränslen i fluidiserad bädd Fuel Processing Technology. 220
Predmety: Gas-solid contact, Chemical-looping combustion, Solid fuels, Volatiles distributor
Popis: A novel concept called volatiles distributor (VD), with the purpose to achieve an even distribution of volatiles over the cross-section of a fluidized-bed and better contact between volatiles and bed materials, has been investigated. The concept could be useful for chemical- looping combustion, as well as other solid fuel conversion processes in fluidized-beds. An experimental study of the VD in a circulating fluidized-bed (CFB) cold-flow model was conducted under different fluidization velocities and flows of simulated volatiles. In the reference case without VD, a local plume of volatiles is formed and the maldistribution becomes more pronounced at higher fluidization velocity in the range from 1 m/s to 4 m/s. Conversely, higher fluidization velocity gives a more even volatiles distribution in the presence of VD. The relative standard deviation of volatiles horizontal distribution decreases from 131% in absence of VD to 22% in presence of VD at the fluidization velocity of 4 m/s. There is no significant effect of volatiles flow rate on VD performance at a fluidization velocity 1 m/s. As the fluidization velocity and volatiles flow rate increase, the bed level inside VD is lowered and the volatiles inside the VD become less diluted, because less air from the main fluidization passes through the VD.
Popis súboru: electronic
Prístupová URL adresa: https://research.chalmers.se/publication/524780
https://research.chalmers.se/publication/524780/file/524780_Fulltext.pdf
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Items – Name: Title
  Label: Title
  Group: Ti
  Data: An experimental study of a volatiles distributor for solid fuels chemical-looping combustion process
– Name: Author
  Label: Authors
  Group: Au
  Data: <searchLink fieldCode="AR" term="%22Li%2C+Xiaoyun%22">Li, Xiaoyun</searchLink>, 1990<br /><searchLink fieldCode="AR" term="%22Lyngfelt%2C+Anders%22">Lyngfelt, Anders</searchLink>, 1955<br /><searchLink fieldCode="AR" term="%22Mattisson%2C+Tobias%22">Mattisson, Tobias</searchLink>, 1970
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  Label: Source
  Group: Src
  Data: <i>Fördelning av flykt vid inmatning av fasta bränslen i fluidiserad bädd Fuel Processing Technology</i>. 220
– Name: Subject
  Label: Subject Terms
  Group: Su
  Data: <searchLink fieldCode="DE" term="%22Gas-solid+contact%22">Gas-solid contact</searchLink><br /><searchLink fieldCode="DE" term="%22Chemical-looping+combustion%22">Chemical-looping combustion</searchLink><br /><searchLink fieldCode="DE" term="%22Solid+fuels%22">Solid fuels</searchLink><br /><searchLink fieldCode="DE" term="%22Volatiles+distributor%22">Volatiles distributor</searchLink>
– Name: Abstract
  Label: Description
  Group: Ab
  Data: A novel concept called volatiles distributor (VD), with the purpose to achieve an even distribution of volatiles over the cross-section of a fluidized-bed and better contact between volatiles and bed materials, has been investigated. The concept could be useful for chemical- looping combustion, as well as other solid fuel conversion processes in fluidized-beds. An experimental study of the VD in a circulating fluidized-bed (CFB) cold-flow model was conducted under different fluidization velocities and flows of simulated volatiles. In the reference case without VD, a local plume of volatiles is formed and the maldistribution becomes more pronounced at higher fluidization velocity in the range from 1 m/s to 4 m/s. Conversely, higher fluidization velocity gives a more even volatiles distribution in the presence of VD. The relative standard deviation of volatiles horizontal distribution decreases from 131% in absence of VD to 22% in presence of VD at the fluidization velocity of 4 m/s. There is no significant effect of volatiles flow rate on VD performance at a fluidization velocity 1 m/s. As the fluidization velocity and volatiles flow rate increase, the bed level inside VD is lowered and the volatiles inside the VD become less diluted, because less air from the main fluidization passes through the VD.
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  Data: electronic
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        Value: 10.1016/j.fuproc.2021.106898
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      – Text: English
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      – SubjectFull: Gas-solid contact
        Type: general
      – SubjectFull: Chemical-looping combustion
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      – SubjectFull: Volatiles distributor
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            NameFull: Lyngfelt, Anders
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              Value: 220
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            – TitleFull: Fördelning av flykt vid inmatning av fasta bränslen i fluidiserad bädd Fuel Processing Technology
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