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| 燃煤锅炉低NOx排放技术研究 |
| Low NOx emission technologies for coal-fired boilers |
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| DOI： |
| 中文关键词: 燃煤锅炉 低氮燃烧 烟气脱硝 Nox |
| 英文关键词:coal-fired boiler low-NOx combustion flue gas denitrification Nox |
| 基金项目: |
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| 中文摘要: |
| “十二五”规划加大了对NOx的治理力度,新标准中重点地区NOx排放限值由原来的200 mg·m-3减少到100 mg·m-3.而燃煤锅炉作为NOx的主要排放源,减排刻不容缓.介绍了燃煤锅炉热力型NOx、燃料型NOx和快速型NOx的生成机理.燃烧中控制NOx的方法主要有燃料分级燃烧技术、空气分级燃烧技术、烟气再循环燃烧技术等.燃烧后烟气脱氮技术主要是选择性非催化还原法(SNCR)、选择性催化还原法(SCR)和SNCR+SCR联合脱硝法,并对其优缺点进行比较,讨论适合燃煤电厂的低NOx排放工艺. |
| 英文摘要: |
| The national “Twelfth Five Year Plan” has claimed that the government would strengthen emission control of nitrogen oxides (NOx). The new emission standard specifies the emission limit value of nitrogen oxides in key areas to be 100 mg·m-3 instead of the original 200 mg·m-3 in the old emission standard. It is urgent to mitigate NOx emissions from coal-fired boilers which are the major sources of NOx emissions. This paper briefly described the generation mechanisms of NOx and the major methods for NOx emission control in combustion processes such as the fuel staged combustion technique, the air staged combustion technique, the flue gas recirculation combustion technique, etc. Flue gas denitrification techniques, such as selective non-catalytic reduction (SNCR), selective catalytic reduction (SCR), and the combination of SNCR and SCR, were also discussed, and a comparison of those techniques was carried out. In addition, a discussion about appropriate NOx emission control technology for coal-fired power plants was made. |
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