摘要
耐火材料是一种必要的工业炉衬基础材料,经过高温煅烧制得,空气中的N2高温氧化形成NOx,且窑炉烟气中NOx浓度根据生产工段的变化而波动。目前国内在耐火材料焙烧窑炉烟气NOx脱除方面的工艺少有报道。为解决这一问题,本文首次提出将选择性催化还原(SCR)法运用到耐火材料焙烧窑炉烟气脱硝工程实验中,根据特定工况烟气参数,通过调整反应参数得到了最佳工艺条件。系统地考察了烟气温度、氨氮比和空速对脱硝效率的影响。研究结果表明,当烟气温度为165℃、氨氮比为1.3、空速为2000h-1时,脱硝效果最佳,脱硝率可达到90%。对于耐火材料焙烧窑炉烟气脱硝治理推广具有较好的前瞻性。
Refractory,prepared by high-temperature calcination,was a necessary basic material for industrial lining.In this way,NOx concentration originated from the oxidation of N2 in the air was according to the changes in the production section.Since NOx removal treatment for refractory baking furnace flue gas had not been clearly reported,the selective catalytic reduction(SCR)method was firstly utilized in engineering experiment.The optimal process conditions were obtained based on the fuel gas parameters.Meanwhile,the effects of flue gas temperature,ammonia-nitrogen ratio and space velocity on denitration efficiency were systematically investigated.The results showed that when the flue gas temperature was 165℃,the ammonia-nitrogen ratio was 1.3,and the space velocity was 2000h-1,the denitration rate could reach to 90%.It had good prospects for the promotion of denitration treatment of refractory baking furnace flue gas.
作者
唐彤
杨永见
万祖德
池少聪
赵攀
黄文凤
李明
TANG Tong;YANG Yongjian;WAN Zude;CHI Shaocong;ZHAO Pan;HUANG Wenfeng;LI Ming(Sichuan Entech Environmental Technology Co.,Ltd.,Mianyang 621000,Sichuan,China;National Flue Gas Desulfurization Engineering Technology Research Center,Chengdu 610041,Sichuan,China)
出处
《化工进展》
EI
CAS
CSCD
北大核心
2020年第S02期401-405,共5页
Chemical Industry and Engineering Progress
基金
四川省重大科技专项(2019YFS0500)。
关键词
选择性催化还原
催化剂
活性
低温脱硝
耐火材料
selective catalytic reduction(SCR)
catalyst
activity
low-temperature denitration
refractory
作者简介
第一作者/通信作者:唐彤(1994—),女,硕士,研究方向为大气污染防控。E-mail:tangtong1281@163.com。
