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Momentum probe and sampling probe for measurement of particle flow properties in CFB boilers

Wennan Zhang (Institutionen för energiomvandling) ; Filip Johnsson (Institutionen för energiomvandling) ; Bo Leckner (Institutionen för energiomvandling)
Chemical Engineering Science (0009-2509). Vol. 52 (1997), 4, p. 497-509.
[Artikel, refereegranskad vetenskaplig]

With the aim of making local particle flow structure studies in commercial scale circulating fluidized-bed (CFB) boilers, a momentum probe and a non-isokinetic particle sampling probe have been designed to measure local momentum flux of gas-solids flow and particle flux. The time-averaged, local particle velocity and concentration are deduced from the measurement results of these two probes. The two probes were calibrated and validated in situ in a CFB boiler furnace. In order to better understand the principle of the momentum probe and to ensure reliable measurements, a theoretical model is established by focusing on the particle deceleration movement inside the probe tip. This model is able to predict the relationship between the gas-solids momentum flux and the impact pressure as obtained from the calibration.

Nyckelord: Circulating fluidized-bed boilers; particle flux probe, momentum probe; gas solids two-phase flow.



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Denna post skapades 2016-06-23. Senast ändrad 2016-08-15.
CPL Pubid: 238202

 

Institutioner (Chalmers)

Institutionen för energiomvandling (1900-2003)

Ämnesområden

Energi
Termisk energiteknik

Chalmers infrastruktur

Chalmers Kraftcentral (CK)