Search: id:"swepub:oai:research.chalmers.se:4cb68d1b-7bc5-442c-bba4-6a697aae0f30" >
Bottom-bed fluid dy...
Bottom-bed fluid dynamics – Influence on solids entrainment
-
- Djerf, Tove, 1989 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
-
- Pallarès, David, 1975 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
-
- Johnsson, Filip, 1960 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
-
(creator_code:org_t)
- Elsevier BV, 2018
- 2018
- English.
-
In: Fuel Processing Technology. - : Elsevier BV. - 0378-3820. ; 173, s. 112-118
- Related links:
-
https://research.cha...
-
show more...
-
https://doi.org/10.1...
-
show less...
Abstract
Subject headings
Close
- In CFB boilers, the solids concentration along the riser and the external solids circulation are important design parameters. This work provides an experimental investigation on how the solids entrainment from the bottom region of a CFB riser is influenced by the fluidization conditions, in particular if there is a bottom bed or not. Measurements are carried out in a CFB riser with a height of 3 m and 0.45 m 2 in cross section. The solids inventory consists of glass spheres with a mean size of 112 μm, employing fluidization velocities up to 1.4 m/s and riser pressure drops in the range 0.15–1.5 kPa. The vertical distribution of solids concentration is determined through pressure drop measurements along the riser height. The external solids circulation is measured with a valve system in the return leg. The results show that the bottom region conditions govern how operational parameters influence the characteristics of the solids entrainment from the bottom. The vertical extension of the splash zone above the dense bed depends strongly on the dense bed height. In the absence of a dense bed, a bottom region with strong solids back-mixing is established which has similarities with the splash region.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Maskinteknik -- Energiteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Mechanical Engineering -- Energy Engineering (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Samhällsbyggnadsteknik -- Geoteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Civil Engineering -- Geotechnical Engineering (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Naturresursteknik -- Havs- och vattendragsteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Environmental Engineering -- Ocean and River Engineering (hsv//eng)
Keyword
- Solids entrainment
- Dense bottom bed
- Circulating fluidized bed (CFB)
- Solids circulation
Publication and Content Type
- art (subject category)
- ref (subject category)
Find in a library
To the university's database