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Data quality is a key factor affecting the application effectiveness of optimization models of denitrification system operation. In response to the problems of lagging and poor representativeness of monitoring parameters in denitrification system operation, a denitrification performance parameter dimension reduction technology suitable for real-time performance monitoring is developed. The utilization rate of reducing agents that can reflect the denitrification ability of the denitrification system itself is set as the monitoring and evaluation parameter for denitrification system operation status, to improve the efficiency of data generation. Based on this, an optimization method for denitrification system operation that can eliminate adjustment delays is established, and an identification technology for typical abnormalities in denitrification system operation is constructed to guide the economic, safe, stable, and standard operation of the denitrification system. This technology has been implemented and applied in a 1 000 MW coal-fired unit at different loads. The results show that, the denitrification system operation guided by the utilization rate of reducing agents reduces the unit consumption of urea solution by 1.5%~8.4% and the ammonia escape at the denitrification system outlet by 10.7%~27.0%, and all of the ammonia escape at different loads meets the general control value of ammonia escape rate. The variation range of NOx emission mass concentration in the exhaust reduces from 44.5~58.3 mg/m3 to 9.2~10.6 mg/m3, and the distribution deviation significantly decreases from 59.2%~75.2% to 21.4%~25.1%, which is more conducive to the automatic and stable control of the denitrification system.
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数据品质是影响脱硝运行优化模型应用效果的关键因素。针对脱硝运行监测参数的滞后性、代表性差等问题,开发了适用于实时性能监测的脱硝性能参数降维技术,设定可反映脱硝系统自身脱硝能力的还原剂利用率作为脱硝运行状态的监测评价参数,提高数据生成的效率,以此建立可消除调整延迟性的脱硝系统运行优化方式,构建脱硝系统运行典型异常的识别技术,指导脱硝系统的经济、安全、稳定、达标运行。该技术在某1 000 MW燃煤机组不同负荷工况下进行整体实施应用,结果表明:采用还原剂利用率指导脱硝系统运行,可降低尿素溶液单耗1.5%~8.4%,降低脱硝出口处氨逃逸量10.7%~27.0%,且均满足氨逃逸率一般控制值;机组NOx质量浓度变化幅度由原先的44.5~58.3 mg/m3缩小到9.2~10.6 mg/m3,分布偏差由59.2%~75.2%显著减少到21.4%~25.1%,更有利于机组的脱硝过程实现自动、稳定控制。
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, authorsList=姜龙, 李金晶, 姚宣, 黄中, 杨雪婷, 诸育枫, 宋云畅, 李媛园)}, authors=[Author(id=1236321544486580751, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1236321541907083659, orderNo=0, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=kaveykikiy@163.com, emailSecond=null, emailThird=null, correspondingAuthor=0, authorType=1, ext={EN=AuthorExt(id=1236321544570466836, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1236321541907083659, authorId=1236321544486580751, language=EN, stringName=Long JIANG, firstName=Long, middleName=null, lastName=JIANG, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
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1.华北电力科学研究院有限责任公司,北京 100045, bio={"content":"
姜龙(1988),男,博士,高级工程师,主要研究方向为电站锅炉大气污染物治理及环保设施优化技术,kaveykikiy@163.com。
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姜龙(1988),男,博士,高级工程师,主要研究方向为电站锅炉大气污染物治理及环保设施优化技术,kaveykikiy@163.com。
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1.华北电力科学研究院有限责任公司,北京 100045)])]), Author(id=1236321546462097981, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1236321541907083659, orderNo=2, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=null, emailSecond=null, emailThird=null, correspondingAuthor=0, authorType=1, ext={EN=AuthorExt(id=1236321546705367623, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1236321541907083659, authorId=1236321546462097981, language=EN, stringName=Xuan YAO, firstName=Xuan, middleName=null, lastName=YAO, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
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2.国能龙源环保有限公司,北京 100036, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null)}, companyList=[AuthorCompany(id=1236321544134259187, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1236321541907083659, xref=2., ext=[AuthorCompanyExt(id=1236321544142647797, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1236321541907083659, companyId=1236321544134259187, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
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3.Department of Energy and Power Engineering, Tsinghua University, Beijing 100084, China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1236321547095437924, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1236321541907083659, authorId=1236321546894111316, language=CN, stringName=黄中, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
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4.Shanghai Boiler Works Co., Ltd., Shanghai 200245, China), AuthorCompanyExt(id=1236321544377528840, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1236321541907083659, companyId=1236321544360751622, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
4.上海锅炉厂有限公司,上海 200245)])], figs=[ArticleFig(id=1236321551100998466, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1236321541907083659, language=EN, label=Fig.1, caption=
Technical scheme for optimization of denitrification system operation, figureFileSmall=jIx+jC+rXoWqvydqklhwWQ==, figureFileBig=QBLyqjFCmTe6bpZ9lRbNSg==, tableContent=null), ArticleFig(id=1236321551176495946, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1236321541907083659, language=CN, label=图1, caption=
脱硝运行优化技术方案, figureFileSmall=jIx+jC+rXoWqvydqklhwWQ==, figureFileBig=QBLyqjFCmTe6bpZ9lRbNSg==, tableContent=null), ArticleFig(id=1236321551507845982, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1236321541907083659, language=EN, label=Fig.2, caption=
Schematic diagram of intelligent diagnosis for abnormal ammonia spray, figureFileSmall=GTjNTKPXh+o/TVtuZg459w==, figureFileBig=aft5jfjesJtrDuvUrA8Okw==, tableContent=null), ArticleFig(id=1236321551616897895, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1236321541907083659, language=CN, label=图2, caption=
喷氨异常智能诊断流程示意, figureFileSmall=GTjNTKPXh+o/TVtuZg459w==, figureFileBig=aft5jfjesJtrDuvUrA8Okw==, tableContent=null), ArticleFig(id=1236321551717561198, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1236321541907083659, language=EN, label=Fig.3, caption=
Distribution of reducing agent utilization rate of reactor A in the denitration system under full operation conditions, figureFileSmall=ab6+YU/eSalijqNtFRrUVQ==, figureFileBig=PzcPLIQK+3KxIiRpmh0OlA==, tableContent=null), ArticleFig(id=1236321551818224500, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1236321541907083659, language=CN, label=图3, caption=
全工况下脱硝系统A反应器还原剂利用率分布, figureFileSmall=ab6+YU/eSalijqNtFRrUVQ==, figureFileBig=PzcPLIQK+3KxIiRpmh0OlA==, tableContent=null), ArticleFig(id=1236321551944053629, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1236321541907083659, language=EN, label=Fig.4, caption=
Distribution of reducing agent utilization rate of reactor B in the denitration system under full operation conditions, figureFileSmall=8OyKJ7D0qqBnVkE1yS67Fw==, figureFileBig=vjHyHv5h9t7UbYewEdTKfw==, tableContent=null), ArticleFig(id=1236321552061494147, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1236321541907083659, language=CN, label=图4, caption=
全工况下脱硝系统B反应器还原剂利用率分布, figureFileSmall=8OyKJ7D0qqBnVkE1yS67Fw==, figureFileBig=vjHyHv5h9t7UbYewEdTKfw==, tableContent=null), ArticleFig(id=1236321552204100489, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1236321541907083659, language=EN, label=Fig.5, caption=
Economic comparison of ammonia supply in the denitrification system before and after optimization, figureFileSmall=7DrxYsBjJCifuozIFQTURQ==, figureFileBig=rV9Q6m1qnT37VltZRmuJhw==, tableContent=null), ArticleFig(id=1236321552325735312, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1236321541907083659, language=CN, label=图5, caption=
优化前、后脱硝系统供氨经济性对比, figureFileSmall=7DrxYsBjJCifuozIFQTURQ==, figureFileBig=rV9Q6m1qnT37VltZRmuJhw==, tableContent=null), ArticleFig(id=1236321552426398615, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1236321541907083659, language=EN, label=Tab.1, caption=
Comparison of online monitoring parameters
, figureFileSmall=null, figureFileBig=null, tableContent=
| 反应器 | 参数 | 实测均值 | 表盘均值 | 相对偏差 |
|---|
| A | 进口烟温/℃ | 345.2 | 343.9 | 0.38% |
| 进口NOx质量浓度/(mg·m–3) | 240.1 | 229.7 | 4.53% |
| 出口NOx质量浓度/(mg·m–3) | 35.9 | 37.2 | 3.49% |
| 进口烟气流量/(km3·h–1) | 1 615 | 1658 | 2.59% |
| B | 进口烟温/℃ | 348.9 | 347.3 | 0.46% |
| 进口NOx质量浓度/(mg·m–3) | 253.8 | 246.2 | 3.09% |
| 出口NOx质量浓度/(mg·m–3) | 37.3 | 38.1 | 2.10% |
| 进口烟气流量/(km3·h–1) | 1 698 | 1 743 | 2.58% |
), ArticleFig(id=1236321552539644829, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1236321541907083659, language=CN, label=表1, caption=
在线监测参数比对
, figureFileSmall=null, figureFileBig=null, tableContent=
| 反应器 | 参数 | 实测均值 | 表盘均值 | 相对偏差 |
|---|
| A | 进口烟温/℃ | 345.2 | 343.9 | 0.38% |
| 进口NOx质量浓度/(mg·m–3) | 240.1 | 229.7 | 4.53% |
| 出口NOx质量浓度/(mg·m–3) | 35.9 | 37.2 | 3.49% |
| 进口烟气流量/(km3·h–1) | 1 615 | 1658 | 2.59% |
| B | 进口烟温/℃ | 348.9 | 347.3 | 0.46% |
| 进口NOx质量浓度/(mg·m–3) | 253.8 | 246.2 | 3.09% |
| 出口NOx质量浓度/(mg·m–3) | 37.3 | 38.1 | 2.10% |
| 进口烟气流量/(km3·h–1) | 1 698 | 1 743 | 2.58% |
), ArticleFig(id=1236321552652891044, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1236321541907083659, language=EN, label=Tab.2, caption=
Reducing agent utilization rate matrix of reactor A in the denitrification system
, figureFileSmall=null, figureFileBig=null, tableContent=
| 系统出力/(kg·h–1) | 进口烟温/℃ |
|---|
| 310 | 320 | 330 | 340 | 350 | 360 |
|---|
| 250 | 97.1 | 97.5 | 96.9 | | | |
| 300 | 95.2 | 96.2 | 93.2 | 88.1 | | |
| 350 | | | 89.2 | 85.1 | 84.8 | |
| 400 | | | | 82.7 | 81.9 | 82.9 |
| 450 | | | | | 82.2 | 79.3 |
| 500 | | | | | | 80.2 |
), ArticleFig(id=1236321552799691692, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1236321541907083659, language=CN, label=表2, caption=
脱硝系统A反应器还原剂利用率矩阵
, figureFileSmall=null, figureFileBig=null, tableContent=
| 系统出力/(kg·h–1) | 进口烟温/℃ |
|---|
| 310 | 320 | 330 | 340 | 350 | 360 |
|---|
| 250 | 97.1 | 97.5 | 96.9 | | | |
| 300 | 95.2 | 96.2 | 93.2 | 88.1 | | |
| 350 | | | 89.2 | 85.1 | 84.8 | |
| 400 | | | | 82.7 | 81.9 | 82.9 |
| 450 | | | | | 82.2 | 79.3 |
| 500 | | | | | | 80.2 |
), ArticleFig(id=1236321552879383473, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1236321541907083659, language=EN, label=Tab.3, caption=
Reducing agent utilization rate matrix of reactor B in the denitrification system
, figureFileSmall=null, figureFileBig=null, tableContent=
| 系统出力/(kg·h–1) | 进口烟温/℃ |
|---|
| 310 | 320 | 330 | 340 | 350 | 360 |
|---|
| 250 | 93.4 | 95.0 | 95.2 | | | |
| 300 | 92.7 | 94.2 | 91.2 | 85.2 | | |
| 350 | | | 86.2 | 84.1 | 82.1 | |
| 400 | | | | 82.1 | 83.3 | 82.3 |
| 450 | | | | | 78.2 | 79.2 |
| 500 | | | | | | 80.7 |
), ArticleFig(id=1236321552967463863, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1236321541907083659, language=CN, label=表3, caption=
脱硝系统B反应器还原剂利用率矩阵
, figureFileSmall=null, figureFileBig=null, tableContent=
| 系统出力/(kg·h–1) | 进口烟温/℃ |
|---|
| 310 | 320 | 330 | 340 | 350 | 360 |
|---|
| 250 | 93.4 | 95.0 | 95.2 | | | |
| 300 | 92.7 | 94.2 | 91.2 | 85.2 | | |
| 350 | | | 86.2 | 84.1 | 82.1 | |
| 400 | | | | 82.1 | 83.3 | 82.3 |
| 450 | | | | | 78.2 | 79.2 |
| 500 | | | | | | 80.7 |
), ArticleFig(id=1236321553084904384, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1236321541907083659, language=EN, label=Tab.4, caption=
Comparison of NOx emission mass concentration uniformity before and after optimization
, figureFileSmall=null, figureFileBig=null, tableContent=
| 项目 | 750~1 000 MW | 500~750 MW | 500 MW以下 |
|---|
| 优化前 | 优化后 | 优化前 | 优化后 | 优化前 | 优化后 |
|---|
| 最大值/(mg·m–3) | 63.2 | 40.2 | 58.7 | 38.9 | 66.2 | 39.3 |
| 最小值/(mg·m–3) | 10.3 | 30.1 | 14.2 | 29.3 | 7.9 | 28.7 |
| 平均值/(mg·m–3) | 43.1 | 34.1 | 38.3 | 36.1 | 36.8 | 35.2 |
| 偏差/% | 75.2 | 25.1 | 59.2 | 22.8 | 62.3 | 21.4 |
), ArticleFig(id=1236321553185567688, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1236321541907083659, language=CN, label=表4, caption=
优化前、后机组NOx排放质量浓度均匀性对比
, figureFileSmall=null, figureFileBig=null, tableContent=
| 项目 | 750~1 000 MW | 500~750 MW | 500 MW以下 |
|---|
| 优化前 | 优化后 | 优化前 | 优化后 | 优化前 | 优化后 |
|---|
| 最大值/(mg·m–3) | 63.2 | 40.2 | 58.7 | 38.9 | 66.2 | 39.3 |
| 最小值/(mg·m–3) | 10.3 | 30.1 | 14.2 | 29.3 | 7.9 | 28.7 |
| 平均值/(mg·m–3) | 43.1 | 34.1 | 38.3 | 36.1 | 36.8 | 35.2 |
| 偏差/% | 75.2 | 25.1 | 59.2 | 22.8 | 62.3 | 21.4 |
), ArticleFig(id=1236321553315591119, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1236321541907083659, language=EN, label=Tab.5, caption=
Identification and analysis of abnormal operation of the denitrification system
, figureFileSmall=null, figureFileBig=null, tableContent=
| 参数 | 工况1 | 工况2 | 工况3 |
|---|
| 系统出力/(kg·h–1) | 415.0 | 345.0 | 270.0 |
| 烟气温度/℃ | 349.0 | 335.0 | 318.0 |
| 还原剂利用率/% | 78.8 | 83.9 | 90.8 |
| 还原剂利用率特征值/% | 82.4 | 88.4 | 96.9 |
| 还原剂利用率相对偏差/% | –5.37 | –5.30 | –5.31 |
| 均方根误差/% | 0.58 |
), ArticleFig(id=1236321553441420249, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1236321541907083659, language=CN, label=表5, caption=
脱硝系统运行异常识别分析
, figureFileSmall=null, figureFileBig=null, tableContent=
| 参数 | 工况1 | 工况2 | 工况3 |
|---|
| 系统出力/(kg·h–1) | 415.0 | 345.0 | 270.0 |
| 烟气温度/℃ | 349.0 | 335.0 | 318.0 |
| 还原剂利用率/% | 78.8 | 83.9 | 90.8 |
| 还原剂利用率特征值/% | 82.4 | 88.4 | 96.9 |
| 还原剂利用率相对偏差/% | –5.37 | –5.30 | –5.31 |
| 均方根误差/% | 0.58 |
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