Article(id=1217836027696304292, tenantId=1146029695717560320, journalId=1210938733613449225, issueId=1217836019408360416, articleNumber=null, orderNo=null, doi=10.19666/j.rlfd.202502056, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1740412800000, receivedDateStr=2025-02-25, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1768284335302, onlineDateStr=2026-01-13, pubDate=1764000000000, pubDateStr=2025-11-25, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1768284335302, onlineIssueDateStr=2026-01-13, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1768284335302, creator=13701087609, updateTime=1768284335302, updator=13701087609, issue=Issue{id=1217836019408360416, tenantId=1146029695717560320, journalId=1210938733613449225, year='2025', volume='54', issue='11', pageStart='1', pageEnd='168', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1768284333326, creator=13701087609, updateTime=1768284453982, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1217836525543408117, tenantId=1146029695717560320, journalId=1210938733613449225, issueId=1217836019408360416, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1217836525543408118, tenantId=1146029695717560320, journalId=1210938733613449225, issueId=1217836019408360416, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=161, endPage=168, ext={EN=ArticleExt(id=1217836027947962553, articleId=1217836027696304292, tenantId=1146029695717560320, journalId=1210938733613449225, language=EN, title=Calculation method for banking fire duration of subcritical circulating fluidized bed boilers based on energy balance, columnId=1211002405299294959, journalTitle=Thermal Power Generation, columnName=Thermal energy science research, runingTitle=null, highlight=null, articleAbstract=
As a core control parameter in peak regulation via banking fire, the banking fire duration directly affects the safety and economic efficiency of unit operation. However, due to the complex coupling and dynamic characteristics of thermodynamic parameters during the banking process, it is difficult for existing calculation methods to achieve efficient and accurate calculations. An energy-balance-based method was proposed for banking fire duration calculation in subcritical CFB boilers. A dynamic equilibrium model was established for heat storage and turbine heat utilization and heat dissipation during banking fire, deriving heat storage and release formulas for key heat sources, such as bed material, refractory, metal heating surfaces, working fluid, and carbon combustion. Finally, the banking fire duration was obtained. Taking a 300 MW sub-critical CFB unit as an example, the absolute error between the calculated value and the measured value is controlled within 5 minutes, and the relative error is less than 10%, which can meet the engineering requirements of fire-hold peak-shaving. The results demonstrate that, in terms of heat storage, the heat storage of metal heating surfaces contributes 35%~41% to the banking fire duration. The contributions of bed material and refractory are each approximately 20%, and the contribution of carbon combustion in the bed material is 10%~15%. The contributions of gas and working fluid heat storage are less than 2% and can be neglected. In terms of heat consumption, heat consumption for power generation accounts for the highest proportion, and it increases with the electrical load. The heat required for the steam turbine to overcome its own rotational resistance accounts for approximately 20%, and the proportion of heat dissipation of the unit is less than 5%. By raising the initial temperature of banking fire, increasing the amount of bed material, using coal with high volatile content, and reducing the electrical load of the unit during banking, the banking fire duration can be significantly prolonged. Notably, the banking fire duration exceeds 2 hours only when the average electrical load during banking is reduced to 1% of rated load.
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压火时长作为压火调峰的核心控制参数,直接影响机组运行的安全性和经济性。然而,由于压火过程中各热力学参数的复杂耦合与动态特性,现有计算方法难以实现高效、精准计算。针对亚临界CFB锅炉压火调峰,提出一种基于能量平衡的压火时长计算方法,建立压火期间锅炉蓄热量、汽轮机利用热量与散热量的动态平衡模型,推导出床料、浇注料、金属受热面、工质及碳燃烧等关键热源的蓄放热公式,最终计算得到压火时长。以某300 MW亚临界CFB机组为例,计算值与实测值绝对误差控制在5 min内,相对误差小于10%,能够满足压火调峰工程需要。研究结果表明:蓄热方面,金属受热面蓄热对压火时长的贡献度为35%~41%、床料与浇注料的贡献度各约20%、床料中碳燃烧的贡献度为10%~15%,气体和工质蓄热的贡献度不足2%,可忽略;耗热方面,发电耗热占比最高,且随电负荷增大而增大,汽轮机克服本身转动阻力所需的热占比约20%,机组散热占比低于5%。通过提高压火初始温度、增加床料量、燃用高挥发分煤种、降低机组压火期间电负荷可显著延长压火时长。通常只有将压火期间平均电负荷降低至1%额定负荷以下,压火时长才能够大于2 h。
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1.State Grid Shanxi Electric Power Research Institute, Taiyuan 030001, China
2.Beijing Huairou Laboratory, Beijing 101499, China
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1.国网山西省电力公司电力科学研究院,山西 太原 030001
2.北京怀柔实验室,北京 101499
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刘众元(1982),男,博士,正高级工程师,主要研究方向为电站锅炉节能降碳和循环流化床锅炉技术,trisuns@126.com。
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刘众元(1982),男,博士,正高级工程师,主要研究方向为电站锅炉节能降碳和循环流化床锅炉技术,trisuns@126.com。
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1.State Grid Shanxi Electric Power Research Institute, Taiyuan 030001, China
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1.国网山西省电力公司电力科学研究院,山西 太原 030001
2.北京怀柔实验室,北京 101499
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1.State Grid Shanxi Electric Power Research Institute, Taiyuan 030001, China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1217836031940940134, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1217836027696304292, authorId=1217836030489710931, language=CN, stringName=刘志兵, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
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1.国网山西省电力公司电力科学研究院,山西 太原 030001, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null)}, companyList=[AuthorCompany(id=1217836029244002566, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1217836027696304292, xref=1., ext=[AuthorCompanyExt(id=1217836029264974089, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1217836027696304292, companyId=1217836029244002566, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
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1.State Grid Shanxi Electric Power Research Institute, Taiyuan 030001, China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1217836032217764218, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1217836027696304292, authorId=1217836032012243307, language=CN, stringName=梁五洲, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
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1.国网山西省电力公司电力科学研究院,山西 太原 030001, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null)}, companyList=[AuthorCompany(id=1217836029244002566, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1217836027696304292, xref=1., ext=[AuthorCompanyExt(id=1217836029264974089, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1217836027696304292, companyId=1217836029244002566, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
1.State Grid Shanxi Electric Power Research Institute, Taiyuan 030001, China), AuthorCompanyExt(id=1217836029285945610, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1217836027696304292, companyId=1217836029244002566, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
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2, 3, address=
2.Beijing Huairou Laboratory, Beijing 101499, China
3.Shanxi Research Institute of Huairou Laboratory, Taiyuan 030001, China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1217836032519754126, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1217836027696304292, authorId=1217836032322621825, language=CN, stringName=马素霞, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
2, 3, address=
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211: 106587., articleTitle=Heat transfer analysis of stationary bed materials in a CFB boiler after a sudden power failure, refAbstract=null)], funds=[Fund(id=1217836036688892473, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1217836027696304292, awardId=ZD2023008A, language=EN, fundingSource=Program of Huairou Laboratory(ZD2023008A), fundOrder=null, country=null), Fund(id=1217836036764389949, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1217836027696304292, awardId=ZD2023008A, language=CN, fundingSource=怀柔实验室项目(ZD2023008A), fundOrder=null, country=null)], companyList=[AuthorCompany(id=1217836029244002566, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1217836027696304292, xref=1., ext=[AuthorCompanyExt(id=1217836029264974089, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1217836027696304292, companyId=1217836029244002566, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
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Proportions of various heat release quantities during unit banking fire, figureFileSmall=MMOT0rJpb7ephx2Jbx6kcg==, figureFileBig=oj+cmfCfUxFY8Qc7MWw2ZQ==, tableContent=null), ArticleFig(id=1217836034323304961, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1217836027696304292, language=CN, label=图1, caption=
机组压火期间各类放热量占比, figureFileSmall=MMOT0rJpb7ephx2Jbx6kcg==, figureFileBig=oj+cmfCfUxFY8Qc7MWw2ZQ==, tableContent=null), ArticleFig(id=1217836034566574603, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1217836027696304292, language=EN, label=Fig.2, caption=
Proportions of various heat consumptions quantities during unit banking fire, figureFileSmall=HOjXyaKANEz628JLkBvU1g==, figureFileBig=wFSZTUaC52+vJV6f5J5cVw==, tableContent=null), ArticleFig(id=1217836034671432206, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1217836027696304292, language=CN, label=图2, caption=
机组压火期间各类耗热量占比, figureFileSmall=HOjXyaKANEz628JLkBvU1g==, figureFileBig=wFSZTUaC52+vJV6f5J5cVw==, tableContent=null), ArticleFig(id=1217836034780484116, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1217836027696304292, language=EN, label=Tab.1, caption=
Main design parameters of the boiler
, figureFileSmall=null, figureFileBig=null, tableContent=
| 项目 | 数值 |
|---|
| 机组额定电负荷/MW | 300 |
| 锅炉额定蒸发量/(t·h–1) | 1 033.6 |
| 主蒸汽压力/MPa | 17.50 |
| 主蒸汽温度/℃ | 541 |
| 再热蒸汽压力/MPa | 3.46 |
| 再热蒸汽温度/℃ | 541 |
| 额定负荷下床温/℃ | 880 |
| 额定负荷下燃煤量/(t·h–1) | 257.5 |
| 额定负荷下锅炉效率/% | 90.60 |
| 额定负荷下锅炉耗煤量/(t·h–1) | 232.0 |
| 设计煤种低位发热量/(kJ·kg–1) | 12 243 |
| 设计煤总挥发分/% | 29.38 |
| 锅炉额定负荷下散热损失/% | 0.20 |
| 布风板面积/m2 | 133 |
| 床料比热容/(kJ·(kg·K)–1) | 1.102 |
| 耐火材料比热容/(kJ·(kg·K)–1) | 1.048 |
), ArticleFig(id=1217836034868564505, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1217836027696304292, language=CN, label=表1, caption=
锅炉主要设计参数
, figureFileSmall=null, figureFileBig=null, tableContent=
| 项目 | 数值 |
|---|
| 机组额定电负荷/MW | 300 |
| 锅炉额定蒸发量/(t·h–1) | 1 033.6 |
| 主蒸汽压力/MPa | 17.50 |
| 主蒸汽温度/℃ | 541 |
| 再热蒸汽压力/MPa | 3.46 |
| 再热蒸汽温度/℃ | 541 |
| 额定负荷下床温/℃ | 880 |
| 额定负荷下燃煤量/(t·h–1) | 257.5 |
| 额定负荷下锅炉效率/% | 90.60 |
| 额定负荷下锅炉耗煤量/(t·h–1) | 232.0 |
| 设计煤种低位发热量/(kJ·kg–1) | 12 243 |
| 设计煤总挥发分/% | 29.38 |
| 锅炉额定负荷下散热损失/% | 0.20 |
| 布风板面积/m2 | 133 |
| 床料比热容/(kJ·(kg·K)–1) | 1.102 |
| 耐火材料比热容/(kJ·(kg·K)–1) | 1.048 |
), ArticleFig(id=1217836034944061981, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1217836027696304292, language=EN, label=Tab.2, caption=
Parameters for calculating the banking fire duration
, figureFileSmall=null, figureFileBig=null, tableContent=
| 项目 | 数值 |
|---|
| 炉膛内浇注料质量/t | 166 |
| 旋风分离器浇注料质量/t | 151 |
| 水冷壁总质量/t | 625 |
| 过热器总质量/t | 650 |
| 再热器总质量/t | 305 |
| 汽包容积/m3 | 53.95 |
| 水冷壁总容积/m3 | 143.10 |
| 过热器总容积/m3 | 108.80 |
| 再热器总容积/m3 | 53.65 |
| 汽机维持3 000 r/min空转所需蒸汽量/(kg·s–1) | 4.17 |
| 设计机组效率/% | 38 |
), ArticleFig(id=1217836035032142370, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1217836027696304292, language=CN, label=表2, caption=
压火时长计算参数
, figureFileSmall=null, figureFileBig=null, tableContent=
| 项目 | 数值 |
|---|
| 炉膛内浇注料质量/t | 166 |
| 旋风分离器浇注料质量/t | 151 |
| 水冷壁总质量/t | 625 |
| 过热器总质量/t | 650 |
| 再热器总质量/t | 305 |
| 汽包容积/m3 | 53.95 |
| 水冷壁总容积/m3 | 143.10 |
| 过热器总容积/m3 | 108.80 |
| 再热器总容积/m3 | 53.65 |
| 汽机维持3 000 r/min空转所需蒸汽量/(kg·s–1) | 4.17 |
| 设计机组效率/% | 38 |
), ArticleFig(id=1217836035141194277, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1217836027696304292, language=EN, label=Tab.3, caption=
Conditions for various banking fire test scenarios
, figureFileSmall=null, figureFileBig=null, tableContent=
| 项目 | 工况1 | 工况2 | 工况3 |
|---|
| 压火床温/℃ | 814.6 | 794.6 | 806.8 |
| 扬火床温/℃ | 642.6 | 598.7 | 594.5 |
| 床压/kPa | 9.20 | 10.20 | 11.20 |
| 床料含碳量/% | 2 | 2 | 2 |
| 电负荷/MW | 16.9 | 9.9 | 8.6 |
| 压火时主蒸汽压力/MPa | 15.71 | 16.05 | 14.74 |
| 扬火时主蒸汽压力/MPa | 14.13 | 15.22 | 14.60 |
| 压火时主蒸汽温度/℃ | 538.5 | 541.5 | 547.6 |
| 扬火时主蒸汽温度/℃ | 453.0 | 436.8 | 430.5 |
), ArticleFig(id=1217836036395291178, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1217836027696304292, language=CN, label=表3, caption=
各压火试验工况条件
, figureFileSmall=null, figureFileBig=null, tableContent=
| 项目 | 工况1 | 工况2 | 工况3 |
|---|
| 压火床温/℃ | 814.6 | 794.6 | 806.8 |
| 扬火床温/℃ | 642.6 | 598.7 | 594.5 |
| 床压/kPa | 9.20 | 10.20 | 11.20 |
| 床料含碳量/% | 2 | 2 | 2 |
| 电负荷/MW | 16.9 | 9.9 | 8.6 |
| 压火时主蒸汽压力/MPa | 15.71 | 16.05 | 14.74 |
| 扬火时主蒸汽压力/MPa | 14.13 | 15.22 | 14.60 |
| 压火时主蒸汽温度/℃ | 538.5 | 541.5 | 547.6 |
| 扬火时主蒸汽温度/℃ | 453.0 | 436.8 | 430.5 |
), ArticleFig(id=1217836036491760171, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1217836027696304292, language=EN, label=Tab.4, caption=
Comparison between the calculated duration and the actual test duration for banking fire tests
, figureFileSmall=null, figureFileBig=null, tableContent=
| 计算压火时长/min | 测试压火时长/min | 绝对误差/min | 相对误差/% |
|---|
| 工况1 | 28.6 | 31.7 | –3.1 | –9.78 |
| 工况2 | 54.0 | 50.3 | 3.7 | 7.36 |
| 工况3 | 64.1 | 59.6 | 4.5 | 7.55 |
), ArticleFig(id=1217836036575646255, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1217836027696304292, language=CN, label=表4, caption=
压火试验计算时长和测试时长对比
, figureFileSmall=null, figureFileBig=null, tableContent=
| 计算压火时长/min | 测试压火时长/min | 绝对误差/min | 相对误差/% |
|---|
| 工况1 | 28.6 | 31.7 | –3.1 | –9.78 |
| 工况2 | 54.0 | 50.3 | 3.7 | 7.36 |
| 工况3 | 64.1 | 59.6 | 4.5 | 7.55 |
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