Analysis and Discussions on the Nonuniformity Problem of SCR Denitration Equipment NOx Concentration Distribution in a 600MW Coal-fired Unit
| Autor: | Zhang Yang, He Yongbing, Xu Ketao |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
lcsh:GE1-350
Flue gas Waste management 0211 other engineering and technologies Valve opening 02 engineering and technology respiratory system 010501 environmental sciences Coal fired behavioral disciplines and activities 01 natural sciences cardiovascular system Cause analysis Environmental science 021108 energy Flue lcsh:Environmental sciences NOx 0105 earth and related environmental sciences |
| Zdroj: | E3S Web of Conferences, Vol 165, p 01027 (2020) |
| ISSN: | 2267-1242 |
| DOI: | 10.1051/e3sconf/202016501027 |
| Popis: | Combining with an engineering example, from the aspects of SCR inlet NOx concentration distribution, flue gas velocity uniformity, ammonia injection valve opening, ash deposit, abrasion and flue arrangement, the uniformity problem of SCR denitration equipment outlet NOx concentration distribution is analyzed and discussed in a 660MW coal-fired unit. The results show that the uneven distribution of NOx concentration is caused by the combined action of many factors. In the cause analysis and solution formulation, the influence factors need be overall consideration. By adjusting the ammonia injection valve opening, the uniformity of SCR outlet NOx concentration increases by about 30%, the performance of SCR denitration equipment is obviously improved. At the same time, rationalization proposals and solution measures for the improvement of outlet concentration uniformity are given in order to ensure the safe and stable operation of denitration equipment. |
| Databáze: | OpenAIRE |
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