Solid Circulating Velocity Measurement in a Liquid–Solid Micro-Circulating Fluidised Bed
Abstract
:1. Introduction
2. Experimental Details
2.1. Experimental Set up
2.2. Particle and Liquid Materials
2.3. Experimental Methodology
3. Results and Discussion
3.1. Solid Circulation Rate by Accumulation Method as Validation Experiments
3.2. Influence of Liquid Flow Rate on Solid Circulating Velocity
3.3. Influence of Solid Inventory in the System
3.4. Effect of Particle Size
4. Conclusions
Author Contributions
Funding
Conflicts of Interest
Nomenclature
a | Constant |
Ad | Downcomer cross-sectional area (m) |
Ar | Riser Cross sectional area (m) |
dp | Particle diameter (m) |
g | gravitational acceleration (m/s2) |
Gs | Solid circulation rate (kgm2 s) |
H | bed height (m) |
Ua | Transport transition velocity (m/s) |
Ucr | critical transition velocity (m/s) |
Ul | superficial liquid velocity (m/s) |
Ulc | critical liquid velocity from zone 1 to zone 2 (m/s) |
Ucr/Ut | normalised critical transition velocity (m/s) |
Ulm | Maximum liquid velocity (m/s) |
Us | solid circulating velocity (m/s) |
Usm | maximum solid circulating velocity |
Ut | Particle terminal Velocity (m/s) |
µ | liquid viscosity (Pa.s) |
ρf | fluid density (kg/m3) |
ρp | particle density (kg/m3) |
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Printer | Form2 | MiiCraft+ |
---|---|---|
Printing type | SLA | DLP |
Maker | FormLabs | MiiCraft |
Build size (mm) | 145 × 145 × 175 | 43 × 27 × 180 |
XY resolution (µm) | 150 | 56 |
Z-axis resolution (µm) | 25–100 | 30–100 |
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do Nascimento, O.L.; Reay, D.A.; Zivkovic, V. Solid Circulating Velocity Measurement in a Liquid–Solid Micro-Circulating Fluidised Bed. Processes 2020, 8, 1159. https://doi.org/10.3390/pr8091159
do Nascimento OL, Reay DA, Zivkovic V. Solid Circulating Velocity Measurement in a Liquid–Solid Micro-Circulating Fluidised Bed. Processes. 2020; 8(9):1159. https://doi.org/10.3390/pr8091159
Chicago/Turabian Styledo Nascimento, Orlando L., David A. Reay, and Vladimir Zivkovic. 2020. "Solid Circulating Velocity Measurement in a Liquid–Solid Micro-Circulating Fluidised Bed" Processes 8, no. 9: 1159. https://doi.org/10.3390/pr8091159