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Partitioning characteristic of chlorine ion in gas and solid phases in process of desulfurization wastewater evaporation: model development and calculation

Environmental Science and Pollution Research volume 26, pages 8257–8265 (2019)Cite this article

Abstract

Since the promulgation of “Water Pollution Control Action Plan “ in China, zero liquid discharge of desulfurization wastewater has become a new trend of power plant water pollution control. Aiming at the application of desulfurization wastewater evaporation technology using high-temperature flue gas, simulation and experimental research on quantifying and predicting gas-solid partitioning of chlorine ion under different operation conditions are carried out in this paper. The gas-liquid equilibrium theory is applied to the complex mixed salt system; based on state equation, the semi-empirical model of gas-solid phase partitioning coefficient of chlorine ion is calculated, with high degree of fitting range from 180 to 380 °C. The essential effects of pH, Cl− concentration, and total dissolved solids (TDS) on the gas-solid phase partitioning coefficient of chlorine ion are investigated. The study provides key data for the application of evaporation technology using high-temperature flue gas, obtaining the quantification and prediction of chlorine ion volatilization during desulfurization wastewater evaporation.

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Abbreviations

K :

Gas-liquid partitioning coefficient

m :

Cl− concentration

γ :

Activity coefficient

T :

Temperature (K)

ρ :

Density (kg/m3)

f i :

Fugacity

Φ:

Fugacity coefficient

p :

Total pressure (P)

y :

Mole fraction of gas phase

V :

Total molar volume

Z :

Compression factor

n :

Mole amount

x :

Mole fraction of liquid phase

a :

Intermolecular gravitational correction

b :

Volume correction

D :

Article

vap :

Gas phase

liq :

Liquid phase

c :

Critical

w :

Water

m :

Gas (liquid) phase mixture

t :

Total

i :

Component

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Funding

Support was provided by the National Key R&D Program of China (2018YFB0604305) and Central University Foundation of North China Electric Power University (2017XS124).

Author information

Affiliations

  1. MOE Key Laboratory of Resources and Environmental Systems Optimization, Beijing, 102206, China

    Shuangchen Ma, Jin Chai, Gongda Chen, Kai Wu, Yajun Xiang & Hongtao Zhu

  2. School of Environmental Science and Engineering, North China Electric Power University, Baoding, 071003, China

    Shuangchen Ma, Jin Chai, Gongda Chen, Kai Wu & Hongtao Zhu

  3. Shengfa Environmental Protection Co., XiaMen, 361000, Fu Jian Province, China

    Zhongcheng Wan & Jingrui Zhang

Authors
  1. Shuangchen Ma
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  2. Jin Chai
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  3. Gongda Chen
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  4. Kai Wu
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  6. Zhongcheng Wan
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  7. Jingrui Zhang
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  8. Hongtao Zhu
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Correspondence to Shuangchen Ma.

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Ma, S., Chai, J., Chen, G. et al. Partitioning characteristic of chlorine ion in gas and solid phases in process of desulfurization wastewater evaporation: model development and calculation. Environ Sci Pollut Res 26, 8257–8265 (2019). https://doi.org/10.1007/s11356-018-04070-5

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  • DOI: https://doi.org/10.1007/s11356-018-04070-5

Keywords

  • Desulfurization wastewater
  • High-temperature flue gas evaporation
  • Chlorine ion
  • Gas-solid phase partitioning model