The desulfurization wastewater is a kind of intractable wastewater which comes from the process of wet desulfurization. There are many shortcomings of traditional development methods. Desulfurization wastewater evaporation treatment in flue gas duct as a new processing technology. This approach of evaporating desulfurization wastewater by flue gas is feasible. The feasibility of the demonstration project of boiler flue gas treating wastewater on 4# boiler in Changshu Power Company limited was analyzed; the computational fluid dynamics (CFD) software FLUENT was adopted to simulated the pressure field and velocity field in the outlet flue pipes of air pre-heater. The concrete arrangement mode and the number of the spray lances were determined by calculations. The temperature of the flue gas is tested after the system was put into operation. The results showed that this technology can realize the desulfurization wastewater with zero discharge without hurting the work of electrostatic precipitator. The demonstration project is the first of its kind in domestic power industry; this study provides experiences and references of power plant desulfurization wastewater with zero discharge.
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