烧结烟气中污染物的超低排放  

Ultra-low Emission of Pollutants in Sintering Flue Gas

作　　者：洪建国 耿淑华[1,2,3] 秦自强[1,2,3] 张玉文 郭曙强 鲁雄刚[1,2,3] HONG Jianguo;GENG Shuhua;QIN Ziqiang;ZHANG Yuwen;GUO Shuqiang;LU Xionggang(School of Materials Science and Engineering, Shanghai University, Shanghai 200444, China;State Key Laboratory of Advanced Special Steel, Shanghai University,Shanghai 200444, China;Shanghai Key Laboratory of Advanced Ferrometallurgy, Shanghai 200444, China;Ironmaking Plant, Shanghai Meishan Iron and Steel Co., Ltd., Nanjing Jiangsu 210039, China)

机构地区：[1]上海大学材料科学与工程学院,上海200444 [2]上海大学省部共建高品质特殊钢冶金与制备国家重点实验室,上海200444 [3]上海市钢铁冶金新技术开发应用重点实验室,上海200444 [4]上海梅山钢铁股份有限公司炼铁厂,江苏南京210039

出　　处：《上海金属》2021年第6期71-75,共5页Shanghai Metals

基　　金：国家自然科学基金钢铁联合基金(No.U1860108,No.U1860203)。

摘　　要：以梅山钢铁厂3号烧结机的烟气为例,介绍了从烧结烟气中脱除硫化物(SO_(2))、氮氧化物(NO_(x))及粉尘的方法。生产实践表明:臭氧氧化结合半干法脱硫脱硝可实现烧结烟气中污染物的超低排放,脱硫率大于98%,脱硝率达到88%,出口粉尘含量低于5 mg/m^(3)。此外,实施烧结烟气污染物超低排放后,脱硫灰生成量增加了约55.7%,脱硫灰中硫酸钙含量增加,亚硫酸钙含量减少,成分更稳定,可用作建筑材料。Taking flue gas derived from sinter machine No.3 of Meishan Iron and Steel Plant as an example,the method of removing sulfide(SO_(2)),nitrogen oxide(NO_(x))and dust from the flue gas was introduced.From production practice it was showed that ultra-low emission of pollutants in the flue gas would be achieved by ozone oxidation in combination with semi-dry method,desulfurization ratio being over 98%,denitration ratio being up to 88%,and exit dust content being less than 5 mg/m^(3).Besides,after the implementation of ultra-low emission of the pollutants in the sintering flue gas,the amount of ash produced during desulfurization increased by approximately 55.7%,the desulfurizing ash contained more calcium sulfate and less calcium sulfite,and exhibited even more stable composition,being able to be used as a construction material.

关 键 词：烧结烟气 臭氧氧化 脱硫 脱硝 半干法 超低排放 

分 类 号：X757[环境科学与工程—环境工程]