Release and migration of Hg during desulfurization wastewater evaporation process: Whole process evaluation by experimental and theoretical study.

Hot flue gas evaporation technology is an effective strategy for zero liquid discharge of desulfurization wastewater. However, there is a potential risk that heavy metals such as Hg may be released from the wastewater during evaporation, disrupting the original balance of the power plant or even exceeding the Hg emission standard. Wastewater evaporation and Hg release behavior were obtained using a single droplet drying system.

Experimental study on the treatment of desulfurization wastewater from coal-fired power plant by spray evaporation.

In this study, a pilot-scale evaporation tower system was built to treat the desulfurization wastewater by spray evaporation. The distribution characteristics of Cl in the wastewater evaporation process were investigated. Besides, the morphology and physicochemical property of solid evaporation products from desulfurization wastewater were analyzed.

Removal characteristics of organic pollutants by the adsorbent injection coupled with bag filtering system.

Activated carbon (AC) injection coupled with bag filtering (ACI+BF) is a promising technology for the organic pollutant treatment in the flue gas of coal-fired power plants. The removal characteristics of six volatile organic compounds (VOCs) and adsorption pathways were investigated in a self-designed ACI+BF system. The results suggested that o-xylene had the highest removal efficiency and that was the lowest for benzene, which was influenced by their boiling points and saturated vapor pressures.

Agglomeration and removal characteristics of fine particles from coal combustion under different turbulent flow fields.

Turbulent agglomeration is a promising pretreatment technology for improving the removal of fine particles in industrial flue gas, which can improve the particle removal effect of dust removal equipment safely and economically. However, due to the complexity of turbulence mechanisms, the relationship between turbulent flow fields and the agglomeration of fine particles is not known with precision, resulting a weak promotion effect for particle removal with this pretreatment technology. In this work, three kinds of turbulent agglomerators were constructed to investigate the agglomeration and removal characteristics of fine particles under different turbulent flow fields.