Bipolar charged aerosol agglomeration with alternating electric field in laminar gas flow

Antero Laitinen; Jukka Hautanen; Jorma Keskinen; Esko Kauppinen; Jorma Jokiniemi; Kari Lehtinen

doi:10.1016/S0304-3886(96)00038-1

Bipolar charged aerosol agglomeration with alternating electric field in laminar gas flow

Antero Laitinen (Corresponding Author), Jukka Hautanen, Jorma Keskinen, Esko Kauppinen, Jorma Jokiniemi, Kari Lehtinen

BA3604 Chemical process technologies

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Abstract

This paper presents the results of an experimental study for a method of increasing the efficiency of electrostatic precipitators for the collection of fly ash particles of submicron size. An alternating electric field was used to induce agglomeration of bipolarly charged particles (bipolar AC-agglomeration). A bench-scale AC-agglomeration test apparatus with bipolar corona charger was constructed. Test aerosol was generated from vegetable oil. The total mass loading was 0.2 gm⁻³ (5 × 106 particles cm⁻³), mass median diameter was 0.5 μm. Count median diameter was 0.2 μm, and geometrical standard deviation was 1.8. Residence time in the agglomerator was 4.8 s and the agglomerator field was 5.0 kV cm⁻¹ (rms). Systematic experiments were conducted to investigate the agglomeration efficiency of the system. The percentage decrease in number concentration of 0.1–1.0 μm sized particles was found to be between 17 and 19%.

Original language	English
Pages (from-to)	303 - 315
Number of pages	13
Journal	Journal of Electrostatics
Volume	38
Issue number	4
DOIs	https://doi.org/10.1016/S0304-3886(96)00038-1
Publication status	Published - 1996
MoE publication type	A1 Journal article-refereed

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Laitinen, A., Hautanen, J., Keskinen, J., Kauppinen, E., Jokiniemi, J., & Lehtinen, K. (1996). Bipolar charged aerosol agglomeration with alternating electric field in laminar gas flow. Journal of Electrostatics, 38(4), 303 - 315. https://doi.org/10.1016/S0304-3886(96)00038-1

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title = "Bipolar charged aerosol agglomeration with alternating electric field in laminar gas flow",

abstract = "This paper presents the results of an experimental study for a method of increasing the efficiency of electrostatic precipitators for the collection of fly ash particles of submicron size. An alternating electric field was used to induce agglomeration of bipolarly charged particles (bipolar AC-agglomeration). A bench-scale AC-agglomeration test apparatus with bipolar corona charger was constructed. Test aerosol was generated from vegetable oil. The total mass loading was 0.2 gm−3 (5 × 106 particles cm−3), mass median diameter was 0.5 μm. Count median diameter was 0.2 μm, and geometrical standard deviation was 1.8. Residence time in the agglomerator was 4.8 s and the agglomerator field was 5.0 kV cm−1 (rms). Systematic experiments were conducted to investigate the agglomeration efficiency of the system. The percentage decrease in number concentration of 0.1–1.0 μm sized particles was found to be between 17 and 19%.",

author = "Antero Laitinen and Jukka Hautanen and Jorma Keskinen and Esko Kauppinen and Jorma Jokiniemi and Kari Lehtinen",

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T1 - Bipolar charged aerosol agglomeration with alternating electric field in laminar gas flow

AU - Laitinen, Antero

AU - Hautanen, Jukka

AU - Keskinen, Jorma

AU - Kauppinen, Esko

AU - Jokiniemi, Jorma

AU - Lehtinen, Kari

PY - 1996

Y1 - 1996

N2 - This paper presents the results of an experimental study for a method of increasing the efficiency of electrostatic precipitators for the collection of fly ash particles of submicron size. An alternating electric field was used to induce agglomeration of bipolarly charged particles (bipolar AC-agglomeration). A bench-scale AC-agglomeration test apparatus with bipolar corona charger was constructed. Test aerosol was generated from vegetable oil. The total mass loading was 0.2 gm−3 (5 × 106 particles cm−3), mass median diameter was 0.5 μm. Count median diameter was 0.2 μm, and geometrical standard deviation was 1.8. Residence time in the agglomerator was 4.8 s and the agglomerator field was 5.0 kV cm−1 (rms). Systematic experiments were conducted to investigate the agglomeration efficiency of the system. The percentage decrease in number concentration of 0.1–1.0 μm sized particles was found to be between 17 and 19%.

AB - This paper presents the results of an experimental study for a method of increasing the efficiency of electrostatic precipitators for the collection of fly ash particles of submicron size. An alternating electric field was used to induce agglomeration of bipolarly charged particles (bipolar AC-agglomeration). A bench-scale AC-agglomeration test apparatus with bipolar corona charger was constructed. Test aerosol was generated from vegetable oil. The total mass loading was 0.2 gm−3 (5 × 106 particles cm−3), mass median diameter was 0.5 μm. Count median diameter was 0.2 μm, and geometrical standard deviation was 1.8. Residence time in the agglomerator was 4.8 s and the agglomerator field was 5.0 kV cm−1 (rms). Systematic experiments were conducted to investigate the agglomeration efficiency of the system. The percentage decrease in number concentration of 0.1–1.0 μm sized particles was found to be between 17 and 19%.

U2 - 10.1016/S0304-3886(96)00038-1

DO - 10.1016/S0304-3886(96)00038-1

M3 - Article

VL - 38

SP - 303

EP - 315

JO - Journal of Electrostatics

JF - Journal of Electrostatics

SN - 0304-3886

IS - 4

ER -

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10.1016/S0304-3886(96)00038-1