Abstract:Based on computational fluid dynamics and FLUENT software platform, the relative root mean square (RMS) value was applied as the criterion for judging the uniformity of air flow,and the effects of particle diameter,lue gas velocity,corona electrode voltage,concentration of fine dust on the vortex phenomenon and dust collection efficiency in electrostatic precipitator were simulated in this study. From the results,with the increase of particle diameter and flue gas velocity,the resultant velocity of particles can be increased and the RMS value is cut down greatly,so the tendency to form vortex is weakened. On the other hand,with the increase of particle diameter,the driving velocity of particles can be increased and the dust collection efficiency is improved. But when the flue gas flow rate is increased,the axial velocity can be increased and the dust collection efficiency is reduced. It is found that the larger of corona voltage,the RMS value is bigger and the tendency to form vortex is enhanced. But when the corona voltage is increased,the electric field force of particle is increased significantly,so the dust collection efficiency is improved. If the dust concentration is less than 5 g/m3,with the increase of dust concentration,as a result of the action of "electric wind",the dust collection efficiency will be increased and the RMS value will be increased, the vortex will also be strengthened. If the dust concentration exceeds 5 g/m3,with the increase of dust concentration,the action of "electric wind" will be depressed gradually,the RMS value will be cut down and the dust collection efficiency will decline and the vortex will be weakened.
李海英,多 鹏,王 茹. ESP内气流均匀性和除尘效率的数值模拟[J]. 钢铁, 2017, 52(2): 91-96.
LI Hai-ying,DUO Peng,WANG Ru. Numerical simulation of uniformity of flow and dust collection efficiency of ESP. Iron and Steel, 2017, 52(2): 91-96.
Podlinski J, Kocik M, Barbucha R, et al. EHD flow measured by 3D PIV in a narrow electrostatic precipitor with wire-plate or wire-flocking electrodes[J]. Czechoslovak Journal of Physics.2006,56(2):B-1009-B-1016.
[3]
Podlinski J, Kocik M, Barbucha R, et al. EHD flow measured by 3D PIV in a narrow electrostatic precipitor with wire-plate or wire-flocking electrodes[J]. Czechoslovak Journal of Physics.2006,56(2):B-1009-B-1016.
[4]
Niewulis A, Podlinski J, Mizeraczyk J,et al. Electrohydrodynamic flow patterns in a narrow electrostatic precipitator with longitudinal or transverse wire electrode[J]. Journal of Electrostatics.2009,67(2):123-127.
[4]
Niewulis A, Podlinski J, Mizeraczyk J,et al. Electrohydrodynamic flow patterns in a narrow electrostatic precipitator with longitudinal or transverse wire electrode[J]. Journal of Electrostatics.2009,67(2):123-127.
Zhu J, Zhang Q, Yao Y, et al. Effects of high-voltage power sources on fine particle collection efficiency with an industrial electrostatic precipitation[J]. Journal of Electrostatics.2012, 70(3):285-291.
[6]
Zhu J, Zhang Q, Yao Y, et al. Effects of high-voltage power sources on fine particle collection efficiency with an industrial electrostatic precipitation[J]. Journal of Electrostatics.2012, 70(3):285-291.
K.Adamiak. Numerical models in simulating wire plate electrostatic precipitators:A review[J]. Journal of Electrostatics.2013,71:673-680.
[8]
K.Adamiak. Numerical models in simulating wire plate electrostatic precipitators:A review[J]. Journal of Electrostatics.2013,71:673-680.
[9]
F.J.Gutierrez, B.Navarrete, L.Canadas. Assessment of plate-wire electrostatic precipitators based on dimensional and similarity analyses[J]. Fuel.2011,90:2827-2835.
[9]
F.J.Gutierrez, B.Navarrete, L.Canadas. Assessment of plate-wire electrostatic precipitators based on dimensional and similarity analyses[J]. Fuel.2011,90:2827-2835.
[10]
Jacobo Poteirro, Ruben Martin, Enrique Granada,et al. Three-dimensional model of electrostatic for the estimation of their particle collection efficiency[J]. Fuel Processing Technology.2016,143:86-99.
[10]
Jacobo Poteirro, Ruben Martin, Enrique Granada,et al. Three-dimensional model of electrostatic for the estimation of their particle collection efficiency[J]. Fuel Processing Technology.2016,143:86-99.
Chun Y, Berezin N, Brocilo A A,et al. Numerical modelling of near corona wire electrohydrodynamic flow in a wire-plate electrostatic precipitator[J]. IEE.Trans.Die.Elec.2007,14(1):119-124.
[12]
Chun Y, Berezin N, Brocilo A A,et al. Numerical modelling of near corona wire electrohydrodynamic flow in a wire-plate electrostatic precipitator[J]. IEE.Trans.Die.Elec.2007,14(1):119-124.
[13]
B.S.Choi, C.A.J.Fletcher. Turbulent particle dispersion in an electrostatic precipitator[J]. Applied Mathematical Modelling. 1998, 22:1009-1021.
[13]
B.S.Choi, C.A.J.Fletcher. Turbulent particle dispersion in an electrostatic precipitator[J]. Applied Mathematical Modelling. 1998, 22:1009-1021.
[14]
A.Soldati, P.Andreussi, S.Banerjee. Direct simulation of turbulent particle transport in electrostatic precipitator[J]. AICHE J.1993,39:1910-1919.
[14]
A.Soldati, P.Andreussi, S.Banerjee. Direct simulation of turbulent particle transport in electrostatic precipitator[J]. AICHE J.1993,39:1910-1919.
[15]
Zheng-wei Long, Qiang Yao. Evaluation of various particle charging models for simulating particle dynamics in electrostatic precipitators[J]. Journal of Aerosol Science.2010,41:702-718.
[15]
Zheng-wei Long, Qiang Yao. Evaluation of various particle charging models for simulating particle dynamics in electrostatic precipitators[J]. Journal of Aerosol Science.2010,41:702-718.