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Environmental Science and Pollution Research

, Volume 26, Issue 8, pp 8257–8265 | Cite as

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

  • Shuangchen MaEmail author
  • Jin Chai
  • Gongda Chen
  • Kai Wu
  • Yajun Xiang
  • Zhongcheng Wan
  • Jingrui Zhang
  • Hongtao Zhu
Research Article
  • 83 Downloads

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.

Keywords

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

Nomenclature

K 

Gas-liquid partitioning coefficient

m

Cl concentration

γ

Activity coefficient

T

Temperature (K)

ρ

Density (kg/m3)

fi

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

Greek letters

D

Article

vap

Gas phase

liq

Liquid phase

c

Critical

w

Water

m

Gas (liquid) phase mixture

t

Total

i 

Component

Notes

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).

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  • Shuangchen Ma
    • 1
    • 2
    Email author
  • Jin Chai
    • 1
    • 2
  • Gongda Chen
    • 1
    • 2
  • Kai Wu
    • 1
    • 2
  • Yajun Xiang
    • 1
  • Zhongcheng Wan
    • 3
  • Jingrui Zhang
    • 3
  • Hongtao Zhu
    • 1
    • 2
  1. 1.MOE Key Laboratory of Resources and Environmental Systems OptimizationBeijingChina
  2. 2.School of Environmental Science and EngineeringNorth China Electric Power UniversityBaodingChina
  3. 3.Shengfa Environmental Protection Co.XiaMenChina

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