烧结烟气CO的产生及治理途径——末端治理技术  

Generation and governance way of CO in sintering flue gas——end treatment technology

作　　者：廖继勇[1,2,4] 郑浩翔 甘敏 余海钊[1,2,4] 康建刚 范晓慧[3] LIAO Jiyong;ZHENG Haoxiang;GAN Min;YU Haizhao;KANG Jiangang;Fan Xiaohui(Engineering Technology Research Center,Zhongye Changtian International Engineering Co.,Lid.,Changsha 410205,Hunan,China;Sintering and Pelletizing Editorial Department,Zhongye Changtian International Engineering Co.,Lid.,Changsha 410205,Hunan,China;School of Minerals Processing and Bioengineering,Central South University,Changsha 410083,Hunan,China;National Engineering Research Center of Sintering and Pelletizing Equipment System,Changsha 410205,Hunan,China)

机构地区：[1]中冶长天国际工程有限责任公司工程技术研究中心,湖南长沙410205 [2]中冶长天国际工程有限责任公司《烧结球团》编辑部,湖南长沙410205 [3]中南大学资源加工与生物工程学院,湖南长沙410083 [4]国家烧结球团装备系统工程技术研究中心,湖南长沙410205

出　　处：《烧结球团》2021年第2期17-23,共7页Sintering and Pelletizing

基　　金：国家自然科学基金面上项目(51974371);湖南省重点研发计划资助项目(2018SK2049);湖南省科技创新平台与人才计划(2018TP1033)。

摘　　要：CO对人类身体健康和自然环境的损害较大,其治理工作已成为世界钢铁企业关注的重点问题。本文通过对以Cosorb溶液、Hisorb溶液和亚铜氨溶液为主的溶液吸收法,固体吸附剂吸附法,以及臭氧、芬顿试剂等强氧化法和催化氧化法进行归纳和总结分析,得出结论:采用沸石分子筛转轮浓缩吸附技术治理烧结烟气CO是一种可选技术,但吸附剂的吸附容量、选择性及投入产出效益仍有待进一步研究;臭氧催化氧化CO的反应温度和活化能明显降低,长远来看,该技术是一种较好的低质量浓度CO净化技术;CO催化氧化法由于可以提升烟气温度30℃左右,将其安装在SCR反应器和活性炭脱硫装置之间,可使CO出口烟气质量浓度降低至1000 mg/Nm^(3)以内,因此该技术得到了越来越广泛的研究与应用,但是寻找耐水、耐S并且价格低廉的高效CO催化剂仍是需要研究的问题。CO has great damage to human health and the natural environment,and its governance has become a key issue of concern to the world’s steel companies.The solution absorption method mainly relying on Cosorb solution,Hisorb solution and cuprious ammonia solution,solid adsorbent adsorption method,ozone,Fenton reagent and other strong oxidation methods,as well as catalytic oxidation methods are summarized and analyzed.The results show that,adopting zeolite molecular sieve runner to concentrate and adsorb CO is an optional technology to treat CO in sintering flue gas,but the adsorption capacity,selectivity and input-output benefits of the adsorbent still need further study.The reaction temperature and activation energy of catalytic oxidation of CO by ozone are obviously reduced.In the long run,this technology is a better CO purification technology with low volume concentration.The CO catalytic oxidation method can raise the flue gas temperature by about 30℃,and it is installed between the SCR reactor and the activated carbon desulfurization device,so that the volume concentration of flue gas at the CO outlet can be reduced to less than 1000 mg/Nm^(3).This technology has been more and more widely studied and applied.However,looking for high-efficiency CO catalysts that are resistant to water,sulfur and low in price are still issues that need to be studied.

关 键 词：烧结烟气 CO 减排 溶液吸收法 吸附法 氧化法 选择性催化还原 

分 类 号：TF046.4[冶金工程—冶金物理化学]