In a desulfurization wastewater renovation project of a coal-fired power plant in Shandong Province,the original triple-tank process was replaced by integrated high efficiency clarification process to treat the desulfuriza-tion wastewater,with suspended solids of 13 650 mg/L,CODCr of 350 mg/L and heavy metal ion concentration ex-ceeding the standard.The basic chemical dosage could be determined by laboratory test.By on-site equipment joint adjustment,the operating parameters could be optimized and equipment damage rate could be reduced.After 168 h commissioning and running,the new process of desulfurization wastewater system was stable and effective.The efflu-ent SS was 1.5 mg/L,CODCr was 132.2 mg/L,total lead,total cadmium,total mercury,total chromium,and total zinc were 0.14,0.01,0.01,1.04,and 1.24 mg/L,respectively.The effluent quality could meet the relevant indicators of the Discharge Standard of Wastewater from Limestone-Gypsum Flue Gas Desulfurization System in Fossil Fuel Power Plants(DL/T 997-2020).Compared with the original triple-tank process in power plants,the integrated high-efficiency clarification process not only significantly improved water quality,but also reduced annual operating costs from over 1 million yuan to over 0.5 million yuan,with significant economic effects.
关键词
燃煤电厂/脱硫废水/一体式高效澄清装置/调试
Key words
coal-fired power plant/desulfurization wastewater/integrated high efficiency clarification equipment/commissioning
维普
万方数据