Abstract
Desulfurization wastewater evaporation technology is an effective approach to achieve zero liquid discharge. However, limited information is available on the practical engineering performance and related risks of the technology. In this study, we conducted a field test of desulfurization wastewater evaporation technology in a demonstration project. The results indicated the technology was highly feasible and applicable to three operating conditions with varying desulfurization wastewater flow rates. The migration characteristics of Cl were investigated, revealing that less than 3 % of Cl was released into gaseous HCl. The concentrations of other typical pollutants, such as NOx and SO2, remained unchanged after treatment, indicating that the wastewater evaporation technology did not significantly affect the distribution of gaseous pollutants or the comprehensive fly ash utilization. Moreover, the study found that the evaporation process promoted the agglomeration of particulate matter, as confirmed by larger particle sizes and XRD analysis. The total operating cost of wastewater evaporation ranged from 25 to 30 yuan per ton of wastewater, primarily consisting of coal consumption for extracting flue gas. The data obtained in this work complements and verifies existing research on wastewater evaporation technology.
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