基于烧结工序的半干法烧结废气脱硫脱硝工艺节能减排研究

Energy Saving and Emission Reduction Research on Semi-dry Sintering Waste Gas Desulfurization and Denitrification Process Based on Sintering Process

传统的烧结废气治理方法往往能耗较高,不仅增加了企业的生产成本,还加剧了能源资源的紧张局面。对此,基于传统半干法脱硫脱硝技术进行改进,提出一种半干法循环流化床脱硫除尘与中低温选择性催化还原技术结合的综合技术。经实验分析表明:该研究技术下节约的电力约是改进前半干法工艺的2.47倍,是湿法脱硫+SCR脱硝技术的1.97倍;基于研究技术的烧结废气处理工艺耗气量最低,平均每天耗气量约为0.34 m^(3)/t,改进前的半干法工艺技术的平均每天耗气量为0.74 m^(3)/t,湿法脱硫+SCR脱硝技术下平均每天耗气量为0.72 m^(3)/t。由此得出,改进后的半干法工艺可以达到烧结废气处理中节约能耗的效果。

The traditional sintering waste gas treatment method often has high energy consumption,which not only increases the production cost of enterprises,but also aggravates the tension of energy resources.Therefore,based on the improvement of traditional semi-dry desulphurization and denitrification technology,a comprehensive technology combining semi-dry circulating fluidized bed desulphurization and dust removal with medium-low temperature selective catalytic reduction technology is proposed.Through the experimental analysis,the results show that the power saving under the research technology is about 2.47 times of the semi-dry process and 1.97 times of the wet desulphurization+SCR denitration technology.The sintering waste gas treatment process based on the research technology has the lowest gas consumption,and its average daily gas consumption is about 0.34 m^(3)/t.Before the improvement,the average daily gas consumption of the semi-dry process technology is 0.74 m^(3)/t,and the average daily gas consumption of the wet desulfurization+SCR denitration technology is 0.72 m^(3)/t.In conclusion,the improved semi-dry process can achieve the effect of energy saving in the treatment of sintering waste gas.