Article(id=1221467206370640540, tenantId=1146029695717560320, journalId=1210938733613449225, issueId=1221467200582500783, articleNumber=null, orderNo=null, doi=10.19666/j.rlfd.202212174, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=null, receivedDateStr=null, revisedDate=1671120000000, revisedDateStr=2022-12-16, acceptedDate=null, acceptedDateStr=null, onlineDate=1769150075762, onlineDateStr=2026-01-23, pubDate=1684944000000, pubDateStr=2023-05-25, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1769150075762, onlineIssueDateStr=2026-01-23, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1769150075762, creator=13701087609, updateTime=1769150075762, updator=13701087609, issue=Issue{id=1221467200582500783, tenantId=1146029695717560320, journalId=1210938733613449225, year='2023', volume='52', issue='5', pageStart='1', pageEnd='166', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1769150074382, creator=13701087609, updateTime=1769157444393, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1221498112716226774, tenantId=1146029695717560320, journalId=1210938733613449225, issueId=1221467200582500783, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1221498112716226775, tenantId=1146029695717560320, journalId=1210938733613449225, issueId=1221467200582500783, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=136, endPage=144, ext={EN=ArticleExt(id=1221467206630687395, articleId=1221467206370640540, tenantId=1146029695717560320, journalId=1210938733613449225, language=EN, title=Numerical simulation of NOx reduction by injecting coal-water slurry pyrolysis gas into reduction zone of a 330 MW pulverized coal boiler, columnId=1211002409397129992, journalTitle=Thermal Power Generation, columnName=Power generation technology forum, runingTitle=null, highlight=null, articleAbstract=

The denitrification effect of coal-water slurry pyrolysis gas is investigated by numerical simulation in a 330 MW power station pulverized coal boiler, focusing on the influence law of excess air coefficient α1 in the primary combustion zone (PCZ) and pyrolysis gas ratio β on the combustion characteristics and NOx emission in the furnace. The results show that, when β is kept constant, the temperature of the PCZ decreases and the temperature of over-fire air (OFA) zone and furnace outlet increases as α1 decreases. Meanwhile, the decrease of α1 enhances the reducing atmosphere in the PCZ, which is beneficial to improve the denitrification rate of pyrolysis gas and thus to reduce the NOx mass concentration at the furnace outlet. But the decrease of α1 will affect the combustion performance of the pulverized coal and increase the CO concentration at the furnace outlet. With the increase of β, the center of the furnace flame moves up and the reduction rate of NOx by pyrolysis gas increases. When β increases from 5% to 20%, the overall mass concentration of NOx in the furnace shows a trend of first decreasing and then increasing, and when β=15%, the NOx mass concentration reaches the lowest and the NOx reduction efficiency of the pyrolysis gas reaches 44.35%.

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以330 MW机组煤粉锅炉为研究对象,采用数值模拟方法研究了水煤浆热解气的脱硝作用,重点讨论了主燃区过量空气系数α1和热解气比例β对炉内燃烧特性和NOx排放的影响规律。结果表明:当β保持不变时,随着α1减小,主燃区温度降低,燃尽区及炉膛出口温度升高;同时,α1的减小增强了主燃区的还原性气氛,有利于提高热解气的脱硝速率,从而降低炉膛出口的NOx质量浓度,但α1的减小会影响煤粉的燃烧性能并使得炉膛出口CO增多;随着β的增加,炉膛火焰中心上移,热解气对NOx的还原速率升高;当β从5%增至20%时,炉膛整体的NOx质量浓度呈现先减小后增大的趋势,β=15%时NOx质量浓度最低,热解气的NOx还原效率为44.35%。

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张忠孝(1959),男,博士,教授,主要研究方向为洁净能源技术和煤气化技术,
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白昊(1994),男,博士研究生,主要研究方向为燃煤污染物控制技术,

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白昊(1994),男,博士研究生,主要研究方向为燃煤污染物控制技术,

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330 MW机组煤粉炉还原区喷入水煤浆热解气还原NOx数值模拟
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白昊 1 , 张忠孝 1, 2 , 李子祥 2 , 郭欣维 3 , 张健 1 , 乌晓江 2
热力发电 | 发电技术论坛 2023,52(5): 136-144
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热力发电 | 发电技术论坛 2023, 52(5): 136-144
330 MW机组煤粉炉还原区喷入水煤浆热解气还原NOx数值模拟
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白昊1 , 张忠孝1, 2 , 李子祥2, 郭欣维3, 张健1, 乌晓江2
作者信息
  • 1.上海理工大学环境与建筑学院,上海 200093
  • 2.上海交通大学机械与动力工程学院,上海 200240
  • 3.华北水利水电大学乌拉尔学院,河南 郑州 450045
  • 白昊(1994),男,博士研究生,主要研究方向为燃煤污染物控制技术,

通讯作者:

张忠孝(1959),男,博士,教授,主要研究方向为洁净能源技术和煤气化技术,
Numerical simulation of NOx reduction by injecting coal-water slurry pyrolysis gas into reduction zone of a 330 MW pulverized coal boiler
Hao BAI1 , Zhongxiao ZHANG1, 2 , Zixiang LI2, Xinwei GUO3, Jian ZHANG1, Xiaojiang WU2
Affiliations
  • 1.School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093, China
  • 2.School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
  • 3.Ural Institute, North China University of Water Resources and Electric Power, Zhengzhou 450045, China
出版时间: 2023-05-25 doi: 10.19666/j.rlfd.202212174
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以330 MW机组煤粉锅炉为研究对象,采用数值模拟方法研究了水煤浆热解气的脱硝作用,重点讨论了主燃区过量空气系数α1和热解气比例β对炉内燃烧特性和NOx排放的影响规律。结果表明:当β保持不变时,随着α1减小,主燃区温度降低,燃尽区及炉膛出口温度升高;同时,α1的减小增强了主燃区的还原性气氛,有利于提高热解气的脱硝速率,从而降低炉膛出口的NOx质量浓度,但α1的减小会影响煤粉的燃烧性能并使得炉膛出口CO增多;随着β的增加,炉膛火焰中心上移,热解气对NOx的还原速率升高;当β从5%增至20%时,炉膛整体的NOx质量浓度呈现先减小后增大的趋势,β=15%时NOx质量浓度最低,热解气的NOx还原效率为44.35%。

煤粉锅炉  /  热解气  /  燃烧特性  /  NOx排放  /  数值模拟

The denitrification effect of coal-water slurry pyrolysis gas is investigated by numerical simulation in a 330 MW power station pulverized coal boiler, focusing on the influence law of excess air coefficient α1 in the primary combustion zone (PCZ) and pyrolysis gas ratio β on the combustion characteristics and NOx emission in the furnace. The results show that, when β is kept constant, the temperature of the PCZ decreases and the temperature of over-fire air (OFA) zone and furnace outlet increases as α1 decreases. Meanwhile, the decrease of α1 enhances the reducing atmosphere in the PCZ, which is beneficial to improve the denitrification rate of pyrolysis gas and thus to reduce the NOx mass concentration at the furnace outlet. But the decrease of α1 will affect the combustion performance of the pulverized coal and increase the CO concentration at the furnace outlet. With the increase of β, the center of the furnace flame moves up and the reduction rate of NOx by pyrolysis gas increases. When β increases from 5% to 20%, the overall mass concentration of NOx in the furnace shows a trend of first decreasing and then increasing, and when β=15%, the NOx mass concentration reaches the lowest and the NOx reduction efficiency of the pyrolysis gas reaches 44.35%.

pulverized coal boiler  /  pyrolysis gas  /  combustion characteristics  /  NOx emission  /  numerical simulation
白昊, 张忠孝, 李子祥, 郭欣维, 张健, 乌晓江. 330 MW机组煤粉炉还原区喷入水煤浆热解气还原NOx数值模拟. 热力发电, 2023 , 52 (5) : 136 -144 . DOI: 10.19666/j.rlfd.202212174
Hao BAI, Zhongxiao ZHANG, Zixiang LI, Xinwei GUO, Jian ZHANG, Xiaojiang WU. Numerical simulation of NOx reduction by injecting coal-water slurry pyrolysis gas into reduction zone of a 330 MW pulverized coal boiler[J]. Thermal Power Generation, 2023 , 52 (5) : 136 -144 . DOI: 10.19666/j.rlfd.202212174
  • 国家重点研发计划项目(2018YFB0604202)
2023年第52卷第5期
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doi: 10.19666/j.rlfd.202212174
  • 首发时间:2026-01-23
  • 出版时间:2023-05-25
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  • 修回日期:2022-12-16
基金
Research and Development Program(2018YFB0604202)
国家重点研发计划项目(2018YFB0604202)
作者信息
    1.上海理工大学环境与建筑学院,上海 200093
    2.上海交通大学机械与动力工程学院,上海 200240
    3.华北水利水电大学乌拉尔学院,河南 郑州 450045

通讯作者:

张忠孝(1959),男,博士,教授,主要研究方向为洁净能源技术和煤气化技术,
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Number of
species
占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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