摘要
生物质燃料中含有的燃料氮含量较低,但是大约70%～100%(质量分数)的氮最终会转化为NO_x,并且秸秆等生物质燃料燃烧排放的NO_x含量较木质燃料等更高.此外,近年来,我国空气质量面临严峻态势,NO_x是常见的大气污染物,对居民身体健康、生产和生活有很大影响.因此,本文对目前国内外的NO_x燃烧控制技术进行综述,总结了各类技术的优缺点,及我国目前对于生物质锅炉NO_x控制技术遇到的瓶颈,并对该研究领域的未来趋势做出展望.
Currently,fossil fuels such as oil,coal,and natural gas are the world’s primary energy sources. However,it is anticipated that these energy sources will be depleted in less than 100 years. As such,the development of new energy technologies is urgently needed. Biomass is one of the earliest sources of energy,and is used especially in rural areas where it is often the only one that is accessible and affordable. With the depletion of fossil fuels and increasing environmental degradation,biomass energy is attracting increasing attention around the world. Compared with fossil fuel,biomass is carbon neutral and sustainable,and has a smaller greenhouse gas footprint and lower SO2 emission levels. In addition,biomass energy remains the only renewable green energy that can be stored and transported. A number of countries have developed mature and proven combustion technologies,but these technologies are mainly based on wood biomass fuels. Unlike these developed countries,China is a large agricultural country with a limited amount of available firewood. As such,foreign experience cannot be fully applied in China. Although biomass fuels typically have relatively low fuel-N contents,this fuel-N between 70%-100% mass fraction is converted to NO_xduring combustion. In addition,the combustion of straw and other biomass fuels emits more NO_xthan wood fuels. In recent years,the air quality in China has become a serious public health concern,and NO_xis a widespread atmospheric pollutant with significant impacts on human health and the economy. In this paper,an overview of biomass combustion technologies and NO_xcontrol systems in China and around the world was presented,and theiradvantages and disadvantages were summarized. The main bottleneck was identified in NO_xcontrol technologies with respect to biomass boilers in China and the development of new technologies in this field was predicted.
作者
毛洪钧
李悦宁
林应超
王婷
李维尊
鞠美庭
朱复东
MAO Hong-jun;LI Yue-ning;LIN Ying-chao;WANG Ting;LI Wei-zun;JU Mei-ting;ZHU Fu-dong(Centre for Urban Transport Emission Research,College of Environmental Science and Engineering,Nankai University,Tianjin 300071,China;Tianjin Municipal Biomass Solid Waste Resources Technology and Engineering Center,Nankai University,Tianjin 300071,China;Jiangsu Donggong Biomass Energy Research Institute Co.,Ltd,Yancheng 224007,China)
出处
《工程科学学报》
EI
CSCD
北大核心
2019年第1期1-11,共11页
Chinese Journal of Engineering
基金
天津市重点研发计划科技支撑重点资助项目(18YFZCNC01410)
天津市应用基础与前沿技术研究计划(青年项目)资助项目(15JCQNJC15200)
天津市科技支撑重点资助项目(16YFZCSF00410)
关键词
生物质
燃料燃烧
氮氧化物
控制技术
脱硝
biomass fuel
combustion
nitric oxides
control technology
de-NOx
