MOE Key Laboratory of Resources and Environmental Systems Optimization, Beijing, 102206, China.
School of Environmental Science and Engineering, North China Electric Power University, Baoding, 071003, China.
Environ Sci Pollut Res Int. 2019 Mar;26(8):8257-8265. doi: 10.1007/s11356-018-04070-5. Epub 2019 Jan 30.
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.
自中国颁布《水污染防治行动计划》以来，脱硫废水零排放已成为电厂水污染控制的新趋势。针对利用高温烟气进行脱硫废水蒸发技术的应用，本文对不同运行条件下氯离子的气固分配进行了定量和预测的模拟及实验研究。该研究将气液平衡理论应用于复杂混合盐体系，并基于状态方程，计算出氯离子气固相间分配系数的半经验模型，拟合范围为 180 至 380°C，具有较高的拟合度。该模型还考察了 pH 值、Cl 浓度和总溶解固体（TDS）对氯离子气固相间分配系数的影响。该研究为高温烟气蒸发技术的应用提供了关键数据，实现了脱硫废水蒸发过程中氯离子挥发的定量预测。
