SCR Zone-Based Hybrid Dynamic Leveling Technology and Its Application for W-Flame Boiler
Burning anthracite in W-flame boiler inevitably results in the emission of high concentrations of NOx as much as 700~1 200 mg/m3 even with the low nitrogen combustion technology implemented. Therefore, the combination of “SNCR+SCR” is often adopted as the traditional route of ultra-low emission cont...
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State Grid Energy Research Institute
2020-11-01
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| Series: | Zhongguo dianli |
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| Online Access: | https://www.electricpower.com.cn/CN/10.11930/j.issn.1004-9649.202002093 |
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| author | Jian XU Zhi LUO Xin ZHOU Wenjie LI Shaobo HUANG Lei CHANG Xiaobing WANG Guoping NIU Guangcai ZHANG |
| author_facet | Jian XU Zhi LUO Xin ZHOU Wenjie LI Shaobo HUANG Lei CHANG Xiaobing WANG Guoping NIU Guangcai ZHANG |
| author_sort | Jian XU |
| collection | DOAJ |
| description | Burning anthracite in W-flame boiler inevitably results in the emission of high concentrations of NOx as much as 700~1 200 mg/m3 even with the low nitrogen combustion technology implemented. Therefore, the combination of “SNCR+SCR” is often adopted as the traditional route of ultra-low emission control. However, in addition to the high investment and operating costs, this technical route is extremely likely to cause excessive ammonia slip, which eventually leads to air preheater blockage. In this paper, the SCR transformation project of two 330 MW W-flame boilers are conducted by adopting the “SCR zone-based hybrid dynamic leveling technology”. The test results show that after the completion of the project, the SCR removal efficiencies of both boilers have been raised to more than the super high value of 94% while the ammonia escape rate is controlled under 2 µL/L. In this way, not only the goal of ultra-low emission can be achieved but also 14 million RMB of the SNCR investment and 7.6 million RMB of annual operation costs is saved respectively. Besides, to remove the same amount of NOx, 19% less ammonia is consumed after the transformation while the differential pressure of air preheater is still maintained stably in the long term. |
| format | Article |
| id | doaj-art-00a90b4a1a0c4b20ab15b75ed6e41c1f |
| institution | OA Journals |
| issn | 1004-9649 |
| language | zho |
| publishDate | 2020-11-01 |
| publisher | State Grid Energy Research Institute |
| record_format | Article |
| series | Zhongguo dianli |
| spelling | doaj-art-00a90b4a1a0c4b20ab15b75ed6e41c1f2025-08-20T02:04:52ZzhoState Grid Energy Research InstituteZhongguo dianli1004-96492020-11-01531123424210.11930/j.issn.1004-9649.202002093zgdl-53-11-xujianSCR Zone-Based Hybrid Dynamic Leveling Technology and Its Application for W-Flame BoilerJian XU0Zhi LUO1Xin ZHOU2Wenjie LI3Shaobo HUANG4Lei CHANG5Xiaobing WANG6Guoping NIU7Guangcai ZHANG8China Resources Power Holdings Co., Ltd., Shenzhen 518001, ChinaXi'an Thermal Power Research Institute Co., Ltd., Xi'an 710003, ChinaChina Resources Electric (Lian Yuan) Co., Ltd., Loudi 417100, ChinaXi'an Thermal Power Research Institute Co., Ltd., Xi'an 710003, ChinaChina Resources Electric (Lian Yuan) Co., Ltd., Loudi 417100, ChinaXi'an Thermal Power Research Institute Co., Ltd., Xi'an 710003, ChinaXi'an Thermal Power Research Institute Co., Ltd., Xi'an 710003, ChinaXi'an Thermal Power Research Institute Co., Ltd., Xi'an 710003, ChinaXi'an Thermal Power Research Institute Co., Ltd., Xi'an 710003, ChinaBurning anthracite in W-flame boiler inevitably results in the emission of high concentrations of NOx as much as 700~1 200 mg/m3 even with the low nitrogen combustion technology implemented. Therefore, the combination of “SNCR+SCR” is often adopted as the traditional route of ultra-low emission control. However, in addition to the high investment and operating costs, this technical route is extremely likely to cause excessive ammonia slip, which eventually leads to air preheater blockage. In this paper, the SCR transformation project of two 330 MW W-flame boilers are conducted by adopting the “SCR zone-based hybrid dynamic leveling technology”. The test results show that after the completion of the project, the SCR removal efficiencies of both boilers have been raised to more than the super high value of 94% while the ammonia escape rate is controlled under 2 µL/L. In this way, not only the goal of ultra-low emission can be achieved but also 14 million RMB of the SNCR investment and 7.6 million RMB of annual operation costs is saved respectively. Besides, to remove the same amount of NOx, 19% less ammonia is consumed after the transformation while the differential pressure of air preheater is still maintained stably in the long term.https://www.electricpower.com.cn/CN/10.11930/j.issn.1004-9649.202002093w-flame boilerscrpartition mixingdynamic levelingultra-low emissionammonia escape |
| spellingShingle | Jian XU Zhi LUO Xin ZHOU Wenjie LI Shaobo HUANG Lei CHANG Xiaobing WANG Guoping NIU Guangcai ZHANG SCR Zone-Based Hybrid Dynamic Leveling Technology and Its Application for W-Flame Boiler Zhongguo dianli w-flame boiler scr partition mixing dynamic leveling ultra-low emission ammonia escape |
| title | SCR Zone-Based Hybrid Dynamic Leveling Technology and Its Application for W-Flame Boiler |
| title_full | SCR Zone-Based Hybrid Dynamic Leveling Technology and Its Application for W-Flame Boiler |
| title_fullStr | SCR Zone-Based Hybrid Dynamic Leveling Technology and Its Application for W-Flame Boiler |
| title_full_unstemmed | SCR Zone-Based Hybrid Dynamic Leveling Technology and Its Application for W-Flame Boiler |
| title_short | SCR Zone-Based Hybrid Dynamic Leveling Technology and Its Application for W-Flame Boiler |
| title_sort | scr zone based hybrid dynamic leveling technology and its application for w flame boiler |
| topic | w-flame boiler scr partition mixing dynamic leveling ultra-low emission ammonia escape |
| url | https://www.electricpower.com.cn/CN/10.11930/j.issn.1004-9649.202002093 |
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