摘要
Abstract
Based on the case of the lime/gypsum wet flue gas desulfurization (WFGD) system for the 3×75 t/h circulating fluidized bed boiler in the cogeneration power plant of Shanxi Datuhe Coking and Chemical Co., Ltd., the main causes for abnormal gypsum dewatering which leads to abnormal operation of the system are determined quickly and accurately by using the qualitative analysis method according to the color, setting and separation of the slurry and the appearance of the dewatered slurry filter cake, including the high fly ash content, high CaSO3 ·1/2H2O content and high dissolved calcium hydroxide content in the slurry. By lowering the fly ash content, dredging the oxidation air pipeline, adding gypsum seed and timely adjusting the operation condition, the problem is solved, which indicates that the qualitative analysis method is suitable for emergency treatment of WFGD systems.关键词
湿法烟气脱硫/石膏脱水/飞灰/CaSO3·1/2H2O/氢氧化钙/CaSO4· 2H2OKey words
WFGD/gypsum dewatering/fly ash/CaSO3· 1/2H2O/Ca(OH)2/CaSCy 2H2O分类
资源环境
