生活垃圾焚烧发电项目烟气再循环技术工程实践与分析  

Engineering Practice and Analysis of Exhaust Gas Recirculation Technology for Waste Incineration Power Generation Project

作　　者：严浩文 张蓓 王志强 龙吉生 金兴乾 郭欣维 YAN Haowen;ZHANG Bei;WANG Zhiqiang;LONG Jisheng;JIN Xingqian;GUO Xinwei(College of Energy and Power Engineering,North China University of Water Resources and Electric Power,Zhengzhou Henan 450045;Shanghai SUS Environment Co.Ltd.,Shanghai 201703)

机构地区：[1]华北水利水电大学能源与动力学院,河南郑州450045 [2]上海康恒环境股份有限公司,上海201703

出　　处：《环境卫生工程》2025年第1期98-102,共5页Environmental Sanitation Engineering

摘　　要：为探究烟气再循环系统对垃圾焚烧炉燃烧特性及降低NO_(x)排放浓度的影响,以河北省某垃圾焚烧厂为研究对象,采用工程试验的方法,研究了烟气再循环比例、氧浓度等运行因素对炉膛温度、CO浓度、NO_(x)浓度的影响。结果表明:在现有垃圾焚烧工艺及装备的情况下,烟气再循环比例为15%时,省煤器出口氧浓度降低至3.8%以下,CO浓度不能稳定控制在50 mg/m^(3)以下,存在环保不达标的风险;NO_(x)浓度和氧浓度变化趋势一致,随氧浓度升高而升高。同时,省煤器出口氧浓度为4.5%~5.0%时,烟囱出口NO_(x)均值浓度和最大浓度均随烟气再循环比例增加而降低;炉膛温度随烟气再循环比例增加而降低约70℃。In order to explore the effects of exhaust gas recirculation system on the combustion characteristics of garbage incinerators and the reduction of NO_(x) emission concentration,taking a domestic waste incineration plant in Hebei as an example,the engineering experiments were used to study the effects of operating factors such as exhaust gas recirculation ratio and oxygen concentration on furnace temperature,CO concentration,as well as NO_(x) concentration.The results indicated that when using existing waste incineration processes and equipment,with a exhaust gas recirculation ratio of 15%and the oxygen concentration at the outlet of the economizer decreased to below 3.8%,the CO concentration could not be stably controlled below 50 mg/m^(3),posing a risk of environmental non-compliance.The trend of NO_(x) concentration and oxygen concentration was consistent,and it increased with the increase of oxygen concentration.At the same time,when the oxygen concentration at the outlet of economizer was 4.5%-5.0%,the average NO_(x) concentration and the maximum concentration decreased with the increase of the proportion of exhaust gas recirculation.The furnace temperature decreased by about 70℃with the increase of the exhaust gas recirculation ratio.

关 键 词：生活垃圾 焚烧 烟气再循环 工程试验 氮氧化物 

分 类 号：X799.3[环境科学与工程—环境工程]