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Characteristics of the Lateral Particle Distribution in Circulating Fluidized Red Boilers

Wennan Zhang (Institutionen för energiomvandling) ; Filip Johnsson (Institutionen för energiomvandling) ; Bo Leckner (Institutionen för energiomvandling)
Proc of the 4th International Conference on Circulating Fluidized Beds p. 266-273. (1993)
[Konferensbidrag, refereegranskat]

The local time-averaged solids volume fraction was measured in the 12MW~1 Circulating Ruidized Bed (CFR) boiler at Chalmers University of Technology. It was found that the corelwall-layer structure of the flow pattern observed in small-scale beds also characterizes large-scale CFR boilers. The local solids volume fractions close to the wall and in the core region of the furnace were found to be directly proportional to the cross-sectional average solids volume fraetjon, c, as ohtained from pressure rneasurements. If the shape of the membrane-tube wall is taken into account, the relationship for the solids fraction close to the wall (related to a plane wall) is c~=3.6c, which is similar to that reported in literature for plain walls.

Nyckelord: Circulating fluidized bed; Boiler; Fluid dynamics; Lateral particle distribution



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Denna post skapades 2016-06-29. Senast ändrad 2016-08-15.
CPL Pubid: 238586

 

Institutioner (Chalmers)

Institutionen för energiomvandling (1900-2003)

Ämnesområden

Energi
Termisk energiteknik

Chalmers infrastruktur

Chalmers Kraftcentral (CK)