Suspension densities in a high-density circulating fluidized bed riser

Issangya, Allan S.; Bai, Dingrong; Bi, Hsiaotao T.; Lim, Kelly; Zhu, Jesse; Grace, J

doi:10.1016/s0009-2509(99)00283-3

Cited by 151 publications

(110 citation statements)

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“…The model predictions to Issangya's experiment [26] with an increase of G s . When u * >u cl , u cl * becomes negative, this means all the clusters will move upward.…”

Section: Thermal Power Plants -New Trends and Recent Developments 130mentioning

confidence: 66%

“…The model predictions to the onsets of high-density fast bed and dense suspension up-flow for FCC and sand particles fluidized by ambient air are compared with those given by Issangya et al [26] and Grace et al [27] in Figure 16, respectively. The results are also reasonably good.…”

Section: Force Balance Of Falling Clustersmentioning

confidence: 98%

“…Though there were quite a lot of experimental data available in the literature, Issangya's investigation [26] for axial solids holdup distributions seemed the most systematical. FCC particles of 70 μm in diameter and 1600 kg/m 3 in density were fluidized by ambient air in a Figure 19.…”

Section: Prediction Of Axial Solids Holdup Distributionmentioning

confidence: 99%

“…The operating conditions varied from dilute transportation, through the premature fast bed, the classical fast bed, until the high-density fast bed [26].…”

Section: Prediction Of Axial Solids Holdup Distributionmentioning

confidence: 99%

See 3 more Smart Citations

Introductory Review on an Engineering Approach for Fast‐Bed Modeling in Mimic to Bubbling Bed Practice

Zhang¹,

Zhang²

2018

Thermal Power Plants - New Trends and Recent Developments

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Based on the downward-penetrating particle flow through clusters and the analogy between a falling cluster and a rising bubble identified by the authors, a "type-Achoking-oriented separate-phase-coexistence model" for the upper dilute region of fast beds was established first. Without any model parameter adjustment, the unified model predicted successfully the type C choking, the solids holdup of upper dilute region, and transitions to the high-density fast bed and the dense suspension up-flow.The model was then integrated with the sub-models of "cluster rebound at the dense bottom,"" the momentum flux balances for acceleration and transition zones" in the lower and middle parts of the bed. The integrated model predicted successfully the axial solids holdup distributions of literature data under extremely wide operation conditions covering dilute-phase transportation, the premature fast bed, the classical fast bed, and the high-density fast bed.

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“…The model predictions to Issangya's experiment [26] with an increase of G s . When u * >u cl , u cl * becomes negative, this means all the clusters will move upward.…”

Section: Thermal Power Plants -New Trends and Recent Developments 130mentioning

confidence: 66%

Section: Force Balance Of Falling Clustersmentioning

confidence: 98%

Section: Prediction Of Axial Solids Holdup Distributionmentioning

confidence: 99%

“…The operating conditions varied from dilute transportation, through the premature fast bed, the classical fast bed, until the high-density fast bed [26].…”

Section: Prediction Of Axial Solids Holdup Distributionmentioning

confidence: 99%

See 2 more Smart Citations

Introductory Review on an Engineering Approach for Fast‐Bed Modeling in Mimic to Bubbling Bed Practice

Zhang¹,

Zhang²

2018

Thermal Power Plants - New Trends and Recent Developments

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show abstract

“…The resulting configuration is shown schematically in Figure 4.19. It is similar to configurations used by Miller and Gidaspow (1992), Wei et al (1997), andIssangya et al (1998); and similar in principle to that used by Wang et al (1995), whose sampling system was modified for use in a high-temperature system.…”

Section: Suction Probementioning

confidence: 90%

Circulating fluidized bed hydrodynamics experiments for the multiphase fluid dynamics research consortium (MFDRC).

Oelfke¹,

Torczynski²,

O’Hern³

et al. 2006

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An experimental program was conducted to study the multiphase gas-solid flow in a pilot-scale circulating fluidized bed (CFB). This report describes the CFB experimental facility assembled for this program, the diagnostics developed and/or applied to make measurements in the riser section of the CFB, and the data acquired for several different flow conditions. Primary data acquired included pressures around the flow loop and solids loadings at selected locations in the riser. Tomographic techniques using gamma radiation and electrical capacitance were used to determine radial profiles of solids volume fraction in the riser, and axial profiles of the integrated solids volume fraction were produced. Computer Aided Radioactive Particle Tracking was used to measure solids velocities, fluxes, and residence time distributions. In addition, a series of computational fluid dynamics simulations was performed using the commercial code Arenaflow™.

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Circulating Fluidized Beds

Wang

Zhu

2020

Essentials of Fluidization Technology

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Suspension densities in a high-density circulating fluidized bed riser

Cited by 151 publications

References 0 publications

Introductory Review on an Engineering Approach for Fast‐Bed Modeling in Mimic to Bubbling Bed Practice

Introductory Review on an Engineering Approach for Fast‐Bed Modeling in Mimic to Bubbling Bed Practice

Circulating fluidized bed hydrodynamics experiments for the multiphase fluid dynamics research consortium (MFDRC).

Circulating Fluidized Beds

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