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Particles in Contact pp 591–606Cite as

Non-ohmic Properties of Particle Layers in Electrostatic Precipitators

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Abstract

The so-called back-corona hampers the separation of highly resistive particles in electrostatic precipitators. It is linked to the resistivity of the particle layers depending on the particle material, the particle size distribution but also the temperature and humidity of the surrounding gas. In this work, however, it was shown that electret properties are imposed on the particle layers deposited in an electrostatic precipitator. These, in turn, not only explain their non-ohmic properties in electrostatic precipitators but also allows measures to be taken to avoid back-corona.

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Abbreviations

A:

Area (m2)

E:

Electric field strength (V/m)

I:

Electric current (A)

j:

Current density (mA/m2)

R:

Ohmic resistance (Ω)

s:

Particle or dust layer thickness (m)

T:

Temperature (°C)

Td:

Dew point (°C)

t:

Time (s)

σ:

surface charge density (C/m2)

ρ:

Resistivity (Ω cm)

φ:

Relative humidity (%)

e:

Euler-number (–)

ε0:

Electric permittivity of vacuum (As/Vm)

ε:

Electric permittivity

η:

The density of current carriers per unit volume (C/m3)

ηE:

Density of current carriers after exposing a material to a strong electric field (C/m3)

κ:

Conductivity (1/Ω cm)

the κE:

Conductivity of the material after exposing a material to a strong electric field (1/Ω cm)

i:

Index of the initial condition like initial temperature, etc.

f:

Index of the final condition like final temperature, etc.

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Acknowledgements

The authors want to express their gratitude to the Deutsche Forschungsgemeinschaft (DFG) for the financial support of this project. We also acknowledge Prof. Dr.-Ing. U. Riebel for his valuable contributions to the scientific discussion of the subject.

Author information

Authors and Affiliations

  1. Department of Applied Biosciences and Process Engineering, Anhalt University of Applied Sciences, Köthen, Germany

    Damian Pieloth

  2. Laboratory of Solids Process Engineering, TU Dortmund University, Dortmund, Germany

    Helmut Wiggers & Peter Walzel

Authors
  1. Damian Pieloth
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  2. Helmut Wiggers
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  3. Peter Walzel
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Corresponding author

Correspondence to Damian Pieloth .

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Editors and Affiliations

  1. Institute of Particle Process Engineering, Technische Universität Kaiserslautern, Kaiserslautern, Germany

    Sergiy Antonyuk

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Pieloth, D., Wiggers, H., Walzel, P. (2019). Non-ohmic Properties of Particle Layers in Electrostatic Precipitators. In: Antonyuk, S. (eds) Particles in Contact. Springer, Cham. https://doi.org/10.1007/978-3-030-15899-6_19

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