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

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.

Numerical simulation of bypass evaporation system treating FGD wastewater using high temperature flue gas.

A novel zero-liquid discharge (ZLD) technology for desulfurization wastewater treatment is put forward in this paper. A ZLD reconstruction project performed on 2 × 320 MW desulfurization system was taken as the research object, to study the evaporator structure and the key factors affecting spray evaporation through CFD numerical simulation. The result shows that when the evaporator diameter is 2.

Experimental and model research on chloride ion gas-solid distribution in the process of desulfurization wastewater evaporation.

In this paper, research on chloride ion gas-solid distribution in the process of desulfurization wastewater evaporation was carried out. The factor analysis of temperature, pH, and concentrations of Cl Na, Ca and Mg was explored by orthogonal experiments. Results show that the distribution coefficient increases with increasing temperature and Mg concentration and decreasing pH, but decreases with increasing concentrations of Cl, Ca and Na; The interaction and significance of each factor were compared and analyzed, and the order of influence significance on the chloride ion gas-solid distribution coefficient is listed as: temperature (0.