Journal of Soil and Groundwater Environment (한국지하수토양환경학회지:지하수토양환경)

Korean Society of Soil and Groundwater Environment (한국지하수토양환경학회)
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Application of Chemical Dust Suppressants for Control of Fugitive Dust in Ash pond of Thermal Power Plant

화력발전소의 회처리장 내 비산먼지 저감을 위한 화학적 먼지억제제 적용 연구

  • Received : 2018.11.05
  • Accepted : 2018.12.04
  • Published : 2018.12.31
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Abstract

The objective of this study is to evaluate efficiencies of chemical suppressants for control of fugitive dust in ash pond of thermal power plant. In this study, $MgCl_2$, PAM (polyacrylamide), and PVA (poly vinyl alcohol) that are generally applied to suppression of fugitive dust generated from unpaved road, coal mining, storage piles and etc, were employed as chemical dust suppressants. The coal ash (coal combustion residuals) were sampled from the ash pond of Yeongheung power division in Incheon, South Korea. The characterization of the sample including particle size distribution, pH, $pH_{PZC}$ and pore volume as well as XRF analysis were carried out. The suppressant treated-samples were investigated with the wind tunnel experiments to estimate and compare the effect of suppressants on stabilization of the surface of coal ash samples. According to the results, the stability of suppressant-treated samples were significantly improved compared to water-treated samples. Among the three kinds of suppressants, PAM and PVA showed higher efficiencies and cost saving than $MgCl_2$.

Keywords

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Fig. 1. Average wind velocity and maximum wind velocity for each month in the past 5 years (2013~2017).

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Fig. 2. Particle size distribution of the coal ash sample.

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Fig. 3. Point of zero charge measurement for the coal ash sample.

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Fig. 4. Stabilization efficiency of the dust after water treatment.

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Fig. 5. Stabilization efficiency of the dust after MgCl2 treatment at different application rates (232 g/m2 (a), 464 g/m2 (b), 928 g/m2 (c) and 1,393 g/m2 (d)).

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Fig. 6. Stabilization efficiency of the dust after PAM treatment at different application rates (2.2 g/m2 (a), 4.4 g/m2 (b), 8.9 g/m2 (c)).

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Fig. 7. Stabilization efficiency of the dust after PVA treatment at different application rates (2.2 g/m2 (a), 4.4 g/m2 (b), 8.9 g/m2 (c)).

Table 1. Summary of wind tunnel experiments

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Table 2. Chemical composition of the coal ash sample by XRF analysis

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