大容量垃圾焚烧炉内脱硫脱硝一体化工艺研究  

Research on the Integrated Process of Desulfurization and Denitrification in a Large-capacity Waste Incinerator

作　　者：段飞飞 朱传强 杨林 扈明东 尹晓龙 韩昊 DUAN Feifei;ZHU Chuanqiang;YANG Lin;HU Mingdong;YIN Xiaolong;HAN Hao(Everbright Environmental Technology(China)Co.Ltd.,Nanjing Jiangsu 211100;Tianjin Everbright Xingchen Environmental Protection Energy Co.Ltd.,Tianjin 300400)

机构地区：[1]光大环境科技(中国)有限公司,江苏南京211100 [2]天津光大兴辰环保能源有限公司,天津300400

出　　处：《环境卫生工程》2024年第6期64-69,共6页Environmental Sanitation Engineering

基　　金：海南省重点研发专项(ZDYF2022SHFZ315)。

摘　　要：垃圾焚烧发电厂炉内脱硫脱硝一体化处理技术是在垃圾焚烧炉炉膛中同时喷入脱硝剂和脱硫剂,从污染物产生源头脱除NOx和SO_(2)。本研究以大容量垃圾焚烧炉烟气多污染物协同控制为研究对象,在无任何脱硫脱硝工艺,单独使用高温脱硝剂、高温脱硫剂,采用“高温脱硫+半干法脱酸”工艺及协同使用脱硫剂、脱硝剂条件下,对NOx和SO_(2)的排放特性进行分析,并比较了传统工艺及脱硫脱硝一体化工艺的经济成本。结果表明:在750 t/d炉膛中同时喷入0.5 g/m^(3)脱硝剂和0.9 g/m^(3)脱硫剂,脱硝效率、脱硫效率分别可达74%以上和84%以上,可实现NOx排放指标日均值低于100 mg/m^(3)、SO_(2)日均值低于50 mg/m^(3);当采用“高温脱硫+半干法脱酸”工艺、固定石灰浆流量2000 L/h时,可稳定控制烟囱出口SO_(2)排放浓度低于20 mg/m^(3)。技术及经济性分析表明,与传统锅炉尾部烟气处理工艺相比,炉内脱硫脱硝一体化工艺技术系统简单、造价较低,不仅可以降低药剂消耗,而且可以降低90%的投资成本和59%的运营成本,在NOx和SO_(2)排放源头控制方面具有良好的应用前景。The integrated treatment technology of desulfurization and denitrification in the furnace of waste incineration power plant is to inject denitrification and desulfurization agents into the furnace of waste incinerator at the same time to remove NOx and SO_(2)from the source of pollutant generation.In this study,the collaborative control of multipollutants in large-capacity incinerator flue gas was taken as the research object,and the emission characteristics of NOx and SO_(2)were analyzed under the conditions of no desulfurization and denitrification process,using high-temperature denitrification agent and high-temperature desulfurization agent alone,adopting the process of“high-temperature desulfurization+semi-dry deacidification”and using desulfurization and denitrification agents collaboratively.And the economic costs of traditional process and the integrated process of desulfurization and denitrification were compared.The results showed that when 0.5 g/m^(3)denitrification agent and 0.9 g/m^(3)desulfurization agent were injected into 750 t/d furnace at the same time,the denitrification efficiency and desulfurization efficiency could reach above 74%and 84%respectively,and the daily average of NOx emission index could be lower than 100 mg/m^(3),and the daily average of SO_(2)emission index could be lower than 50 mg/m^(3).When the process of“high-temperature desulfurization+semi-dry deacidification”was adopted and the lime slurry flow rate was fixed at 2000 L/h,the SO_(2)emission concentration at the chimney outlet could be stably controlled below 20 mg/m^(3).The technical and economic analysis showed that compared with the traditional boiler tail flue gas treatment processes,the integrated process of desulfurization and denitrification in the furnace was simple and low cost,which could not only reduce the consumption of chemicals,but also reduce investment costs by 90%and operating costs by 59%.It had a good application prospect in the source control of NOx and SO_(2)emissions.

关 键 词：垃圾焚烧 大容量 脱硫脱硝一体化 工艺研究 

分 类 号：X701[环境科学与工程—环境工程] X799.3