燕山大学学报2016，Vol.40Issue(4)：348-354,7.DOI:10.3969/j.issn.1007-791X.2016.04.009
焦炉烟气湿法钢渣联合脱硫脱硝工艺及机理研究
Research on technical method and mechanism of combined desulfurization and denitrification of flue gas from coking furnace with steel slag
摘要
Abstract
Scrap steel slag rich in calcium oxide and magnesium oxide is expected to become a low-cost alkaline absorber of sulfur dioxide and nitrogen oxides for the purification of exhaust gas.In this paper, the composition of steel slag from Shougang Company for the slag slurry was analyzed.A kind of bubbling reactor with the slurry for the removal of NO and SO2 was designed and manufac-tured, and the corresponding reaction thermodynamic was analyzed with HSC chemistry 6.0 software.Alkaline substances in the steel slag played an effective role in desulfurization and denitration of flue gas and the chemical reactions among them in the gas-liquid-solid three-phase system in the reactor were spontaneously exothermic.The results showed that the slag slurry with 8% solid content had high desulfurization rate of 97% and denitration rate of 10.1% for the coke oven flue gas at 303.15 K, and the removal rates of SO2 and NO decreased with increasing temperature.For resolving the problem of low NO removal effect further, oxygen was mixed in the flue gas to covert NO into the substances easily absorbed in the slurry, and KMO4 was added as assistant oxidant in the slurry. The results exhibited that the presence of them significantly improved the effect of the removal of NO, and the overall removal rates of SO2 and NO under 5% ( volume concentration) O2 and 2% ( mass fraction) KMO4 were 98% and 96%, respectively, and this might be benefit theoretically and practically for the desulfurization and denitrification of coke oven flue gas by steel slag in the fu-ture.关键词
钢渣/联合脱硫脱硝/反应热力学及机理/氧气浓度/高锰酸钾Key words
steel smelting slag/combined desulfurization and denitrification/reaction thermodynamics and mechanism/oxygen concentration/KMnO4分类
资源环境引用本文复制引用
王丽秋,王小方,李会泉,王晨晔,王兴瑞,孟子衡..焦炉烟气湿法钢渣联合脱硫脱硝工艺及机理研究[J].燕山大学学报,2016,40(4):348-354,7.基金项目
国家科技支撑计划项目（2013BAC12B04）；中科院科技服务网络计划项目（KFJ-SW-STS-178）；燕山大学研究生课程建设项目 （）
