科研之友
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摘要
Desulfurization wastewater from coal-fired power plants is the most difficult waste water to treat in power plants. Although the amount of water is small, the treatment cost is high. In order to study the technical feasibility and economic feasibility of low-cost treatment of desulphurization wastewater from coal-fired power plants by the slag water system, this paper systematically investigated the changes of water quality of the liquid supernatant of slag-dredger and desulfurization process water (reused water) when the desulfurization wastewater was introduced into the slag water system, as well as the influence on the corrosion of equipment, the reuse of slag and gypsum, and carried on the economic analysis. The results show that, after the desulfurized wastewater was introduced into the slag water system, the water quality of the reused water met the standard of reclaimed water of plant, but the risk of corrosion and scaling of the equipment increased. In addition, the investment and operation cost of this process were obviously lower than that of other existing treatment processes for the treatment of desulfurization wastewater. The results can provide scientific basis and data reference for the zero liquid discharge treatment of desulfurization wastewater from coal-fired power plants with slag water system, and provide guidance for the safe and stable operation of power plants.
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