中水污泥回用对电厂脱硫过程中脱硫石膏品质的影响

Effect of Reclaimed Water Sludge Reuse on Desulfurization Gypsum Quality of Power Plant

中国城市污水排放量未来还会有较大增长,且产生的污泥饼约占中国总固体废弃物的3.5%,城市污泥处理地位日益突出。对污水处理产生污泥的过程进行调控研究,生成富含Ca污泥用于SO2的治理,目前,国内燃煤电厂应用最广泛的烟气脱硫技术是石灰石-石膏湿法烟气脱硫,因此污泥回用于电厂脱硫系统优势明显,但技术尚未成熟。通过对污泥回用机组现场底流浆液及脱硫石膏取样,并对其进行物理化学性质分析,研究了污泥回用对脱硫石膏纯度、粒度、宏观结晶形貌、微观结晶形貌的影响,从而研究污泥回用对电厂的脱硫石膏物理化学品质的影响,以及对脱硫系统的影响,为中水污泥回用提供理论支持。

China’s urban sewage discharge will increase greatly in the future,and the produced sludge cake accounts for about 3.5%of the total solid waste in China,with an increasing urban sludge treatment status.The sludge production process of sewage treatment generates Ca sludge for SO2 treatment.At present,the most widely used flue gas desulfurization technology in domestic coal-fired power plants is limestone-gypsum wet smoke desulfurization,so the sludge reuse has obvious advantages in the desulfurization system of the power plant,but the technology is not mature.By sampling the base flow slurry and desulfurization gypsum,and analyzing the physical and chemical properties,the effect on the desulfurization system and provide theoretical support for reclaimed water sludge reuse.