1 Process Modeling for Dynamic Disperse Particle Separation …
33
obtained from the CFD simulations. Re-entrainment calculations are based on force
ratios and fluid flow conditions. A force progression function accounts for particle
layer properties.
In case of limestone particles (Ulmer Weiss
® ), a steady state redispersion is predicted by the model, showing an increased accuracy in the particle size dependent
precipitation rates. The same holds true for metal oxide particles (Pural NF
® ). Here,
the force progression is more dominant, showing a dynamic increase in precipitation
rates with time. The experimental data exhibit identical trends, however, the analysis
of the force progression factor indicates remaining uncertainty. It should be addressed
in further studies. A promising approach for the derivation of the factor may be by
application of the Discrete-Element-Method (DEM) for studying of particle impact
onto particulate layers, as DEM simulations are capable of resolving the force progression into the layer as well as the resulting force onto particles and groups of
particles. In this way the particle deposition probability and possible re-entrainment
of particles may be calculated directly.
References
1. Jedrusik, M., Swierczok, A., Teisseyre, R.: Experimental study of fly ash precipitation in a
model electrostatic precipitator with discharge electrodes of different design. Powder Technol.
135, 295–301 (2003)
2. Dastoori, K., Makin, B., Kolhe, M., Des-Roseaux, M., Conneely, M.: CFD modelling of flue gas
particulates in a biomass fired stove with electrostatic precipitation. J. Electrostat. 71, 351–356
(2013)
3. Prabhu, V., Kim, T., Khakpour, Y., Serre, S.D., Clack, H.L.: Evidence of powdered activated
carbon preferential collection and enrichment on electrostatic precipitator discharge electrodes
during sorbent injection for mercury emissions control. Fuel Process. Technol. 93, 8–12 (2012)
4. Lübbert, C.: Zur Charakterisierung des gequenchten Zustandes im Elektroabscheider (On
the characterization of the quenched regime in electrostatic precipitators). Brandenburgische
Technische Universität Cottbus, Fakultät für Umweltwissenschaften und Verfahrenstechnik
(2011)
5. Kaul, M., Schmidt, E.: Reduction of fine dust-emissions at inner city areas—opportunities
and limitations of electrostatic precipitators. Presented at the international conference and
exhibition for filtration and separation technology. Cologne, Germany (2015)
6. Xiao, G., Wang, X., Yang, G., Ni, M., Gao, X., Cen, K.: An experimental investigation of electrostatic precipitation in a wire–cylinder configuration at high temperatures. Powder Technol.
269, 166–177 (2015)
7. Wen, T.-Y., Wang, H.-C., Krichtafovitch, I., Mamishev, A.V.: Novel electrodes of an
electrostatic precipitator for air filtration. J. Electrostat. 73, 117–124 (2015)
8. Deutsch, W.: Bewegung und Ladung der Elektrizitätsträger im Zylinderkondensator. Ann. Phys.
373, 335–344 (1922)
9. Podli´ nski, J., Niewulis, A., Mizeraczyk, J.: Electrohydrodynamic flow and particle collection
efficiency of a spike-plate type electrostatic precipitator. J. Electrostat. 67, 99–104 (2009)
10. Schmid, H.-J.: On the modelling of the particle dynamics in electro-hydrodynamic flow fields:
II. Influences of inhomogeneities on electrostatic precipitation. Powder Technol. 135–136,
136–149 (2003)
11. Arif, S., Branken, D.J., Everson, R.C., Neomagus, H.W.J.P., le Grange, L.A., Arif, A.: CFD
modeling of particle charging and collection in electrostatic precipitators. J. Electrostat. 84,
10–22 (2016)
33
obtained from the CFD simulations. Re-entrainment calculations are based on force
ratios and fluid flow conditions. A force progression function accounts for particle
layer properties.
In case of limestone particles (Ulmer Weiss
® ), a steady state redispersion is predicted by the model, showing an increased accuracy in the particle size dependent
precipitation rates. The same holds true for metal oxide particles (Pural NF
® ). Here,
the force progression is more dominant, showing a dynamic increase in precipitation
rates with time. The experimental data exhibit identical trends, however, the analysis
of the force progression factor indicates remaining uncertainty. It should be addressed
in further studies. A promising approach for the derivation of the factor may be by
application of the Discrete-Element-Method (DEM) for studying of particle impact
onto particulate layers, as DEM simulations are capable of resolving the force progression into the layer as well as the resulting force onto particles and groups of
particles. In this way the particle deposition probability and possible re-entrainment
of particles may be calculated directly.
References
1. Jedrusik, M., Swierczok, A., Teisseyre, R.: Experimental study of fly ash precipitation in a
model electrostatic precipitator with discharge electrodes of different design. Powder Technol.
135, 295–301 (2003)
2. Dastoori, K., Makin, B., Kolhe, M., Des-Roseaux, M., Conneely, M.: CFD modelling of flue gas
particulates in a biomass fired stove with electrostatic precipitation. J. Electrostat. 71, 351–356
(2013)
3. Prabhu, V., Kim, T., Khakpour, Y., Serre, S.D., Clack, H.L.: Evidence of powdered activated
carbon preferential collection and enrichment on electrostatic precipitator discharge electrodes
during sorbent injection for mercury emissions control. Fuel Process. Technol. 93, 8–12 (2012)
4. Lübbert, C.: Zur Charakterisierung des gequenchten Zustandes im Elektroabscheider (On
the characterization of the quenched regime in electrostatic precipitators). Brandenburgische
Technische Universität Cottbus, Fakultät für Umweltwissenschaften und Verfahrenstechnik
(2011)
5. Kaul, M., Schmidt, E.: Reduction of fine dust-emissions at inner city areas—opportunities
and limitations of electrostatic precipitators. Presented at the international conference and
exhibition for filtration and separation technology. Cologne, Germany (2015)
6. Xiao, G., Wang, X., Yang, G., Ni, M., Gao, X., Cen, K.: An experimental investigation of electrostatic precipitation in a wire–cylinder configuration at high temperatures. Powder Technol.
269, 166–177 (2015)
7. Wen, T.-Y., Wang, H.-C., Krichtafovitch, I., Mamishev, A.V.: Novel electrodes of an
electrostatic precipitator for air filtration. J. Electrostat. 73, 117–124 (2015)
8. Deutsch, W.: Bewegung und Ladung der Elektrizitätsträger im Zylinderkondensator. Ann. Phys.
373, 335–344 (1922)
9. Podli´ nski, J., Niewulis, A., Mizeraczyk, J.: Electrohydrodynamic flow and particle collection
efficiency of a spike-plate type electrostatic precipitator. J. Electrostat. 67, 99–104 (2009)
10. Schmid, H.-J.: On the modelling of the particle dynamics in electro-hydrodynamic flow fields:
II. Influences of inhomogeneities on electrostatic precipitation. Powder Technol. 135–136,
136–149 (2003)
11. Arif, S., Branken, D.J., Everson, R.C., Neomagus, H.W.J.P., le Grange, L.A., Arif, A.: CFD
modeling of particle charging and collection in electrostatic precipitators. J. Electrostat. 84,
10–22 (2016)