| 烟气深度余热回收技术对燃气锅炉NOx排放扩散迁移规律的影响研究 |
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| 引用本文： | 张艳华,宋光武,罗志云,闫静,潘涛.烟气深度余热回收技术对燃气锅炉NOx排放扩散迁移规律的影响研究[J].环境科学学报,2016,36(3):1064-1069. |
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| 作者姓名： | 张艳华 宋光武 罗志云 闫静 潘涛 |
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| 作者单位： | 1. 北京市环境保护科学研究院, 北京 100037;2. 国家城市环境污染控制工程技术中心, 北京 100037;3. 首都师范大学资源环境与旅游学院, 北京 100048,1. 北京市环境保护科学研究院, 北京 100037;2. 国家城市环境污染控制工程技术中心, 北京 100037,1. 北京市环境保护科学研究院, 北京 100037;2. 国家城市环境污染控制工程技术中心, 北京 100037,1. 北京市环境保护科学研究院, 北京 100037;2. 国家城市环境污染控制工程技术中心, 北京 100037,1. 北京市环境保护科学研究院, 北京 100037;2. 国家城市环境污染控制工程技术中心, 北京 100037 |
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| 基金项目： | 北京市科技计划项目资助(No.D14110900110000) |
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| 摘 要： | 运用Fluent计算软件对北京市丰台区某燃气锅炉排放烟气中NOx的转化和扩散过程进行了数值模拟,定量地研究了烟气深度余热回收技术对燃气锅炉排放NOx在大气中的迁移规律产生的影响,并与Screen 3模型模拟的结果进行了对比.研究发现:烟气深度余热回收技术的应用使NOx的最大落地浓度与烟气直排时相比增加了2.5倍,NOx对本地地表的影响面积增大了15750 m2,增加了本地环境污染的风险.结合燃气锅炉的NOx控制技术提出了缓解局部环境风险的解决方案.结果表明,烟气深度余热回收技术与低氮燃烧技术联用,NOx的控制效率达到70%以上时,在有效提升锅炉热效率的同时,可以缓解由于烟温大幅下降造成的本地环境污染恶化的风险.
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| 关 键 词： | 余热回收 烟气扩散 NOx 数值模拟 低氮燃烧技术 |
| 收稿时间： | 7/7/2015 12:00:00 AM |
| 修稿时间： | 9/1/2015 12:00:00 AM |
Effect of high efficiency heat recovery from flue gas on NOx dispersion in a gas boiler |
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| ZHANG Yanhu,SONG Guangwu,LUO Zhiyun,YAN Jing and PAN Tao.Effect of high efficiency heat recovery from flue gas on NOx dispersion in a gas boiler[J].Acta Scientiae Circumstantiae,2016,36(3):1064-1069. |
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| Authors: | ZHANG Yanhu SONG Guangwu LUO Zhiyun YAN Jing and PAN Tao |
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| Institution: | 1. Beijing Municipal Research Institute of Environmental Protection, Beijing 100037;2. National Engineering Research Center of Urban Environmental Pollution Control, Beijing 100037;3. College of Resource Environment and tourism, Capital Normal University, Beijing 100048,1. Beijing Municipal Research Institute of Environmental Protection, Beijing 100037;2. National Engineering Research Center of Urban Environmental Pollution Control, Beijing 100037,1. Beijing Municipal Research Institute of Environmental Protection, Beijing 100037;2. National Engineering Research Center of Urban Environmental Pollution Control, Beijing 100037,1. Beijing Municipal Research Institute of Environmental Protection, Beijing 100037;2. National Engineering Research Center of Urban Environmental Pollution Control, Beijing 100037 and 1. Beijing Municipal Research Institute of Environmental Protection, Beijing 100037;2. National Engineering Research Center of Urban Environmental Pollution Control, Beijing 100037 |
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| Abstract: | The NOx emission transformation and dispersion process in a gas fired boiler in Fengtai District, Beijing was modeled and analyzed using the Fluent Computational Fluid Dynamics Software. The impact of high efficiency heat recovery technology on NOx emission from the flue gas was quantitatively investigated and compared with the simulated results from Screen 3 model. The results indicated that the maximum NOx concentration at ground surface level increased by 2.5 times and the impacted area of ground surface enlarged about 15750 m2 when a high efficiency heat recovery facility was applied to a boiler. To counteract the ground level pollution increase caused by heat recovery boilers, it was recommended that these boilers be paired with NOx pollution control devices such as low NOx burners. When the low NOx burners reduced NOx emission by 70% or greater, the combination of these two facilities not only reduced the risks of deterioration of the local environment, but also improved the thermal efficiency of the boiler. |
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| Keywords: | Heat recovery flue gas dispersion NOx numerical simulation low NOx combustion technology |
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