SCR烟气脱硝技术及脱硝效率影响因素研究  

Study on SCR flue gas denitrification technology and influencing factors of denitrification efficiency

作　　者：王雷 楼杰 周元祥[3] WANG Lei;LOU Jie;ZHOU Yuanxiang(China energy Jiangsu Power Co.,Ltd.,Nanjing 210000,Jiangsu,China;Guangdong Yudean Jinghai Power Generation Co.,Ltd.,Jieyang 515223,Guangdong,China;Xi’an Thermal Power Research Institute Co.,Ltd.,Xi’an 710054,Shaanxi,China)

机构地区：[1]国家能源集团江苏电力有限公司,江苏南京210000 [2]广东粤电靖海发电有限公司,广东揭阳515223 [3]西安热工研究院有限公司,陕西西安710054

出　　处：《能源化工》2024年第4期65-69,共5页Energy Chemical Industry

摘　　要：SCR脱硝技术是燃煤电厂烟气脱硝最常用的技术之一,为了提高燃煤电厂烟气脱硝效率,以某燃煤电厂的SCR烟气脱硝系统为研究对象,考察了不同类型催化剂、氨氮比、反应温度、二氧化硫质量浓度、氧气体积分数以及含水量等因素对脱硝效率的影响。结果表明,镍基分子筛类催化剂Ni/ZSM的脱硝效果相对更好,脱硝效率明显高于其他催化剂;随着氨氮比的升高,脱硝效率逐渐增大,而随着反应温度的升高以及氧气体积分数的逐渐增大,脱硝效率呈现先升高后降低的趋势;随着二氧化硫质量浓度和含水量的逐渐增大,脱硝效率逐渐降低。当选择Ni/ZSM作为催化剂,控制氨氮比为1.0,反应温度为300℃,氧气体积分数为5%,二氧化硫质量浓度和含水量均为0时,燃煤烟气的SCR脱硝效率可以达到87.1%,脱硝效率较高。SCR denitrification technology is one of the most commonly used technical measures for flue gas denitrification in coalfired power plants.In order to improve the efficiency of flue gas denitrification in coal-fired power plants,the SCR flue gas denitrification system of a coal-fired power plant is studied to investigate the effects of different types of catalysts,ammonia nitrogen ratio,reaction temperature,sulfur dioxide mass concentration,oxygen volume fraction,and water content on denitrification efficiency.The results show that nickel based molecular sieve catalysts Ni/ZSM have relatively better denitrification efficiency,and the denitrification efficiency is significantly higher than other catalysts.As the ammonia nitrogen ratio increases,the denitrification efficiency gradually increases.However,with the increase of reaction temperature and oxygen volume fraction,the denitrification efficiency shows a trend of first increasing and then decreasing.As the water content and sulfur dioxide mass concentration gradually increase,the denitrification efficiency gradually decreases.When Ni/ZSM is selected as the catalyst,the ammonia nitrogen ratio is controlled to be 1.0,the reaction temperature is 300℃,the oxygen volume fraction is 5%,the sulfur dioxide mass concentration and water content are both 0,the SCR denitrification efficiency of coal-fired flue gas can reach 87.1%,and the denitrification efficiency is relatively high.

关 键 词：燃煤电厂 氮氧化物 SCR脱硝技术 脱硝效率 影响因素 

分 类 号：X773[环境科学与工程—环境工程] TQ424.1[化学工程]