Article(id=1211002409757840150, tenantId=1146029695717560320, journalId=1210938733613449225, issueId=1210998030828958715, articleNumber=null, orderNo=null, doi=10.19666/j.rlfd.202307108, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1688140800000, receivedDateStr=2023-07-01, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1766655073823, onlineDateStr=2025-12-25, pubDate=1706112000000, pubDateStr=2024-01-25, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1766655073823, onlineIssueDateStr=2025-12-25, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1766655073823, creator=13701087609, updateTime=1766655073823, updator=13701087609, issue=Issue{id=1210998030828958715, tenantId=1146029695717560320, journalId=1210938733613449225, year='2024', volume='53', issue='1', pageStart='1', pageEnd='196', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1766654029805, creator=13701087609, updateTime=1766734793553, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1211336778607366994, tenantId=1146029695717560320, journalId=1210938733613449225, issueId=1210998030828958715, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1211336778611561299, tenantId=1146029695717560320, journalId=1210938733613449225, issueId=1210998030828958715, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=53, endPage=63, ext={EN=ArticleExt(id=1211002409950778141, articleId=1211002409757840150, tenantId=1146029695717560320, journalId=1210938733613449225, language=EN, title=Numerical investigations on the aerodynamics and flue gas recirculation optimization of cyclone-fired coal boiler, columnId=1210998031487464445, journalTitle=Thermal Power Generation, columnName=High proportion combustion technology for high-alkali coal, runingTitle=null, highlight=null, articleAbstract=
As a kind of slag-tap boiler, cyclone-fired boilers exhibit significantly different aerodynamics comparing with pulverized coal (PC) boilers. However, by far there are still lack of CFD models that are able to provide effective guidance to the design and operation of cyclone-fired boilers. A CFD model of cyclone-fired boilers was developed in which the capture of coal particles by the molten slag layer was considered through a slag layer coal particle capture model. This model was then employed to investigate the aerodynamics and flue gas recirculation (FGR) optimization design of a 550 MW cyclone-fired boiler. The results demonstrate the highly nonuniform characteristics of furnace aerodynamics of cyclone-fired boilers due to the strong swirling flows created by the cyclones leads to the formation of localized high temperature zones and severe boiler fouling problems at the entrance of boiler convection pass. Thus, it is critical to adapt the FGR design with the nonuniform furnace flow and temperature distributions. The simulation results show that, with the optimized FGR design, the high temperature zones and the resulting severe fouling problems were effectively mitigated.
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旋风炉作为一种液态排渣炉,其空气动力学特性与煤粉炉存在显著差异,目前尚缺乏可有效指导旋风炉设计和运行的计算流体动力学(CFD)模型。对此,开发了一种旋风炉CFD数值模型,该模型通过渣层煤粒捕集模型将熔融渣层对煤粒的捕集作用结合在模型中。将该模型应用于某550 MW机组旋风炉的空气动力学特性和烟气再循环(FGR)优化设计研究。研究表明,旋风筒产生的强旋流场使炉内流场分布极不均匀,导致了炉内局部高温和水平烟道入口的严重结渣问题。因此,FGR喷口应根据炉内的不均匀流场和温度分布进行针对性设计,以有效消除炉内的局部高温区域。模拟计算和现场实施结果表明,通过FGR优化设计,炉膛局部高温和严重结渣问题得到了有效缓解。
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, authorsList=秦世泰, 杜俊硕, 李驰, 周永清)}, authors=[Author(id=1211018021875880461, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1211002409757840150, orderNo=0, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=532935646@qq.com, emailSecond=null, emailThird=null, correspondingAuthor=0, authorType=1, ext={EN=AuthorExt(id=1211018021972349460, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1211002409757840150, authorId=1211018021875880461, language=EN, stringName=Shitai QIN, firstName=Shitai, middleName=null, lastName=QIN, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
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1.CHN Energy Shandong Penglai Power Generation Co., Ltd., Yantai 265600, China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1211018022064624151, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1211002409757840150, authorId=1211018021875880461, language=CN, stringName=秦世泰, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
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1.国家能源蓬莱发电有限公司,山东 烟台 265600, bio={"content":"
秦世泰(1996),男,硕士,助理工程师,主要研究方向为电厂锅炉技术,532935646@qq.com。
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秦世泰(1996),男,硕士,助理工程师,主要研究方向为电厂锅炉技术,532935646@qq.com。
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1.国家能源蓬莱发电有限公司,山东 烟台 265600)])]), Author(id=1211018022152704541, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1211002409757840150, orderNo=1, 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=1211018022257562148, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1211002409757840150, authorId=1211018022152704541, language=EN, stringName=Junshuo DU, firstName=Junshuo, middleName=null, lastName=DU, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
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2.烟台龙源电力技术股份有限公司,山东 烟台 264006, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null)}, companyList=[AuthorCompany(id=1211018021653582334, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1211002409757840150, xref=2., ext=[AuthorCompanyExt(id=1211018021661970942, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1211002409757840150, companyId=1211018021653582334, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
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2.烟台龙源电力技术股份有限公司,山东 烟台 264006)])]), Author(id=1211018022739907126, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1211002409757840150, orderNo=3, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=zyq_901@tju.edu.cn, emailSecond=null, emailThird=null, correspondingAuthor=0, authorType=1, ext={EN=AuthorExt(id=1211018022844764728, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1211002409757840150, authorId=1211018022739907126, language=EN, stringName=Yongqing ZHOU, firstName=Yongqing, middleName=null, lastName=ZHOU, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
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3.School of Mechanical Engineering, Tianjin University, Tianjin 300350, China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1211018022953816636, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1211002409757840150, authorId=1211018022739907126, language=CN, stringName=周永清, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
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Schematic of the cyclone-fired boiler, figureFileSmall=vYusddz9m3UOM+FTy8dutw==, figureFileBig=s8eITJoCetYUDLXV17E1bA==, tableContent=null), ArticleFig(id=1211018025453621863, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1211002409757840150, language=CN, label=图1, caption=
旋风炉结构示意, figureFileSmall=vYusddz9m3UOM+FTy8dutw==, figureFileBig=s8eITJoCetYUDLXV17E1bA==, tableContent=null), ArticleFig(id=1211018025600422508, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1211002409757840150, language=EN, label=Fig.2, caption=
Schematic of boiler wall heat transfer process, figureFileSmall=EtOnVq3acIPXTM55E2iDOQ==, figureFileBig=fZOwVrceQkhukvwH/DvSEA==, tableContent=null), ArticleFig(id=1211018025688502895, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1211002409757840150, language=CN, label=图2, caption=
炉膛壁面传热过程示意, figureFileSmall=EtOnVq3acIPXTM55E2iDOQ==, figureFileBig=fZOwVrceQkhukvwH/DvSEA==, tableContent=null), ArticleFig(id=1211018025805943411, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1211002409757840150, language=EN, label=Fig.3, caption=
Pathlines of the PA flow and SA flows from different inlet positions of the SA duct, figureFileSmall=dGmnSZnJEwXFvXDABhOkxw==, figureFileBig=IjWPCEl/cCsm/V+PQmL6KQ==, tableContent=null), ArticleFig(id=1211018025944355446, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1211002409757840150, language=CN, label=图3, caption=
PA和来自SA道不同入口位置的SA流线, figureFileSmall=dGmnSZnJEwXFvXDABhOkxw==, figureFileBig=IjWPCEl/cCsm/V+PQmL6KQ==, tableContent=null), ArticleFig(id=1211018026082767485, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1211002409757840150, language=EN, label=Fig.4, caption=
Vertical and cross-sectional velocity distribution of cyclone, figureFileSmall=JCBKLvOaUQsdv41Wmgpefg==, figureFileBig=LoGimXa0wMWYeFyVfO8Aqw==, tableContent=null), ArticleFig(id=1211018026183430787, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1211002409757840150, language=CN, label=图4, caption=
旋风筒纵截面和横截面的速度分布, figureFileSmall=JCBKLvOaUQsdv41Wmgpefg==, figureFileBig=LoGimXa0wMWYeFyVfO8Aqw==, tableContent=null), ArticleFig(id=1211018026300871302, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1211002409757840150, language=EN, label=Fig.5, caption=
Vertical and cross-sectional temperature distributions of cyclone, figureFileSmall=cFPRmIJfy6TIWb9mBFc0IQ==, figureFileBig=Xeek5eqYEwV6Bv7K1HDYiA==, tableContent=null), ArticleFig(id=1211018026384757386, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1211002409757840150, language=CN, label=图5, caption=
旋风筒纵截面和横截面的温度分布, figureFileSmall=cFPRmIJfy6TIWb9mBFc0IQ==, figureFileBig=Xeek5eqYEwV6Bv7K1HDYiA==, tableContent=null), ArticleFig(id=1211018026489614988, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1211002409757840150, language=EN, label=Fig.6, caption=
FGR ports arrangement on the furnace front and rear walls and the in-situ picture of the front wall FGR ports, figureFileSmall=q0L0KCG3g19+0gk8GcY1pA==, figureFileBig=Tm6xDn4Rt99rZgKPy8iymg==, tableContent=null), ArticleFig(id=1211018026565112463, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1211002409757840150, language=CN, label=图6, caption=
炉膛前后墙FGR喷口布置和前墙FGR喷口现场照片, figureFileSmall=q0L0KCG3g19+0gk8GcY1pA==, figureFileBig=Tm6xDn4Rt99rZgKPy8iymg==, tableContent=null), ArticleFig(id=1211018026682552979, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1211002409757840150, language=EN, label=Fig.7, caption=
Velocity vector plot of the FGR duct, figureFileSmall=l3CYu8WpFoJ5TRrQ/mez0w==, figureFileBig=1CujDRNKUn/63dhNkeiKww==, tableContent=null), ArticleFig(id=1211018026787410584, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1211002409757840150, language=CN, label=图7, caption=
FGR烟道速度矢量, figureFileSmall=l3CYu8WpFoJ5TRrQ/mez0w==, figureFileBig=1CujDRNKUn/63dhNkeiKww==, tableContent=null), ArticleFig(id=1211018026883879579, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1211002409757840150, language=EN, label=Fig.8, caption=
Comparison of the predicted FEGT with the operating data, figureFileSmall=esd6k2Fhld8OBt5+1JeKLw==, figureFileBig=0Fm2KsXilYQq2XSZ42VHaA==, tableContent=null), ArticleFig(id=1211018026980348575, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1211002409757840150, language=CN, label=图8, caption=
炉膛出口烟温预测数据与运行数据的比较, figureFileSmall=esd6k2Fhld8OBt5+1JeKLw==, figureFileBig=0Fm2KsXilYQq2XSZ42VHaA==, tableContent=null), ArticleFig(id=1211018027072623266, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1211002409757840150, language=EN, label=Fig.9, caption=
Flow pathlines originating from the front wall cyclone inlets, velocity distributions at different furnace sectional planes, figureFileSmall=QOE/caVCc5upcPQGONFcxg==, figureFileBig=rdoBYQdFOQ9bOHTCiEeJ/A==, tableContent=null), ArticleFig(id=1211018027164897957, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1211002409757840150, language=CN, label=图9, caption=
从前墙旋风筒入口开始的烟气流线分布和炉膛不同横截面烟气流速分布, figureFileSmall=QOE/caVCc5upcPQGONFcxg==, figureFileBig=rdoBYQdFOQ9bOHTCiEeJ/A==, tableContent=null), ArticleFig(id=1211018027252978344, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1211002409757840150, language=EN, label=Fig.10, caption=
Vertical-and cross-sectional distributions of furnace temperature, figureFileSmall=AnyOKVKPAGm5VXhUqEHW4A==, figureFileBig=02CMTPnBHfZr4+qzttSaTA==, tableContent=null), ArticleFig(id=1211018027349447340, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1211002409757840150, language=CN, label=图10, caption=
炉膛纵截面和不同位置横截面温度分布, figureFileSmall=AnyOKVKPAGm5VXhUqEHW4A==, figureFileBig=02CMTPnBHfZr4+qzttSaTA==, tableContent=null), ArticleFig(id=1211018027429139119, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1211002409757840150, language=EN, label=Fig.11, caption=
FGR pathlines from the FGR ports on the furnace front wall and rear wall to the entrance of boiler convection pass, figureFileSmall=0hyFuB/lX+Ks+KDx5Dqw6Q==, figureFileBig=e/2QbvQ/ABv12OInEtbaqg==, tableContent=null), ArticleFig(id=1211018027500442291, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1211002409757840150, language=CN, label=图11, caption=
从炉膛前墙和后墙FGR喷口到炉膛对流烟道入口的FGR烟气流线分布, figureFileSmall=0hyFuB/lX+Ks+KDx5Dqw6Q==, figureFileBig=e/2QbvQ/ABv12OInEtbaqg==, tableContent=null), ArticleFig(id=1211018027571745462, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1211002409757840150, language=EN, label=Fig.12, caption=
Modified FGR ports arrangement options, figureFileSmall=Rp1vf3vi8RT/nHVrFpZG2g==, figureFileBig=ffZdgnDke9HoLN7ZQ2PbVw==, tableContent=null), ArticleFig(id=1211018027655631545, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1211002409757840150, language=CN, label=图12, caption=
FGR喷口改造方案, figureFileSmall=Rp1vf3vi8RT/nHVrFpZG2g==, figureFileBig=ffZdgnDke9HoLN7ZQ2PbVw==, tableContent=null), ArticleFig(id=1211018027752100539, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1211002409757840150, language=EN, label=Fig.13, caption=
Temperature distributions at the entrance of boiler convection pass for modification cases, figureFileSmall=HV1cgbKkt7YBVFEAqKdTGA==, figureFileBig=GR2PI/5GHItKxCW/kRGbSg==, tableContent=null), ArticleFig(id=1211018027848569533, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1211002409757840150, language=CN, label=图13, caption=
FGR喷口布置改进工况锅炉对流烟道入口烟温分布, figureFileSmall=HV1cgbKkt7YBVFEAqKdTGA==, figureFileBig=GR2PI/5GHItKxCW/kRGbSg==, tableContent=null), ArticleFig(id=1211018027915678401, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1211002409757840150, language=EN, label=Fig.14, caption=
FGR gas flow pathlines from the new port N1 (Case 2) to the entrance of boiler convection pass, figureFileSmall=FuTmOEzVqDA8BESxA0Sk4A==, figureFileBig=eDNwgQKi3RkG0os0vDG22g==, tableContent=null), ArticleFig(id=1211018028003758786, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1211002409757840150, language=CN, label=图14, caption=
烟气从侧墙FGR新增喷口N1(工况2)到对流烟道入口的流线分布, figureFileSmall=FuTmOEzVqDA8BESxA0Sk4A==, figureFileBig=eDNwgQKi3RkG0os0vDG22g==, tableContent=null), ArticleFig(id=1211018028125393604, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1211002409757840150, language=EN, label=Fig.15, caption=
FGR gas flow pathlines from ports F1, F6 (Case 4) to the entrance of boiler convection pass, figureFileSmall=x3b6JP5mXZuuw2xglABgBg==, figureFileBig=T+3DZbixObq1h98uA7zIcg==, tableContent=null), ArticleFig(id=1211018028288971465, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1211002409757840150, language=CN, label=图15, caption=
烟气从F1、F6喷口(工况4)到对流通道入口流线分布, figureFileSmall=x3b6JP5mXZuuw2xglABgBg==, figureFileBig=T+3DZbixObq1h98uA7zIcg==, tableContent=null), ArticleFig(id=1211018028360274638, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1211002409757840150, language=EN, label=Tab.1, caption=
Coal proximate and ultimate analyses data
, figureFileSmall=null, figureFileBig=null, tableContent=
| Mar | Aar | Var | FCar | Car | Har | Oar | Nar | Sar |
|---|
| 28.45 | 5.09 | 31.66 | 34.90 | 49.44 | 3.58 | 12.59 | 0.67 | 0.27 |
), ArticleFig(id=1211018029568234192, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1211002409757840150, language=CN, label=表1, caption=
煤工业与元素分析数据 w/%
, figureFileSmall=null, figureFileBig=null, tableContent=
| Mar | Aar | Var | FCar | Car | Har | Oar | Nar | Sar |
|---|
| 28.45 | 5.09 | 31.66 | 34.90 | 49.44 | 3.58 | 12.59 | 0.67 | 0.27 |
), ArticleFig(id=1211018029660508882, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1211002409757840150, language=EN, label=Tab.2, caption=
Coal particle fineness data
, figureFileSmall=null, figureFileBig=null, tableContent=
| 筛网号 | 4 | 8 | 16 | 30 |
| 通过率/% | 98.5 | 89.0 | 73.0 | 51.0 |
), ArticleFig(id=1211018029773755093, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1211002409757840150, language=CN, label=表2, caption=
煤细度数据
, figureFileSmall=null, figureFileBig=null, tableContent=
| 筛网号 | 4 | 8 | 16 | 30 |
| 通过率/% | 98.5 | 89.0 | 73.0 | 51.0 |
), ArticleFig(id=1211018029882807000, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1211002409757840150, language=EN, label=Tab.3, caption=
Main boiler operating data
, figureFileSmall=null, figureFileBig=null, tableContent=
| 项目 | 数值 | 项目 | 数值 |
|---|
| 总煤量/(kg·s–1) | 70.56 | SA总量/(kg·s–1) | 355.2 |
| 过量空气系数 | 1.18 | 燃尽风总量/(kg·s–1) | 103.1 |
| 总风量/(kg·s–1) | 533.9 | PA、SA温度/℃ | 201.1 |
| PA总量/(kg·s–1) | 75.6 | 再循环烟气温度/℃ | 386.7 |
), ArticleFig(id=1211018029983470299, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1211002409757840150, language=CN, label=表3, caption=
锅炉关键运行参数
, figureFileSmall=null, figureFileBig=null, tableContent=
| 项目 | 数值 | 项目 | 数值 |
|---|
| 总煤量/(kg·s–1) | 70.56 | SA总量/(kg·s–1) | 355.2 |
| 过量空气系数 | 1.18 | 燃尽风总量/(kg·s–1) | 103.1 |
| 总风量/(kg·s–1) | 533.9 | PA、SA温度/℃ | 201.1 |
| PA总量/(kg·s–1) | 75.6 | 再循环烟气温度/℃ | 386.7 |
), ArticleFig(id=1211018030071550688, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1211002409757840150, language=EN, label=Tab.4, caption=
Summary of detailed model scheme
, figureFileSmall=null, figureFileBig=null, tableContent=
| 反应过程 | 模型方法 |
|---|
| 湍流流动 | Realizable k-ε模型 |
| 辐射传热 | 离散坐标法 |
| 烟气发射率 | 灰色气体加权和模型 |
| 煤粒跟踪 | 随机轨道法,每个旋风筒内跟踪16 380个煤粒 |
| 气固耦合 | 粒子源(PSIC)方法 |
| 煤粒热解 | 一阶单反应速率模型 反应速率参数:最大析出量V0=60.67%(可燃基),指前因子Av=61 250 1/s,活化能Ev=43.235 kJ/mol |
| 湍流反应速率 | 涡耗散(eddy-dissipation concept)模型 |
| 炭粒燃烧 | Cchar+0.5O2→CO反应速率:动力学/扩散控制模型 反应速率常数:指前因子Ac=0.001 kg/(m2·s),活化能Ec=79.000 kJ/mol |
), ArticleFig(id=1211018030176408290, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1211002409757840150, language=CN, label=表4, caption=
具体模型总述
, figureFileSmall=null, figureFileBig=null, tableContent=
| 反应过程 | 模型方法 |
|---|
| 湍流流动 | Realizable k-ε模型 |
| 辐射传热 | 离散坐标法 |
| 烟气发射率 | 灰色气体加权和模型 |
| 煤粒跟踪 | 随机轨道法,每个旋风筒内跟踪16 380个煤粒 |
| 气固耦合 | 粒子源(PSIC)方法 |
| 煤粒热解 | 一阶单反应速率模型 反应速率参数:最大析出量V0=60.67%(可燃基),指前因子Av=61 250 1/s,活化能Ev=43.235 kJ/mol |
| 湍流反应速率 | 涡耗散(eddy-dissipation concept)模型 |
| 炭粒燃烧 | Cchar+0.5O2→CO反应速率:动力学/扩散控制模型 反应速率常数:指前因子Ac=0.001 kg/(m2·s),活化能Ec=79.000 kJ/mol |
), ArticleFig(id=1211018030272877286, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1211002409757840150, language=EN, label=Tab.5, caption=
Predicted maximum and average gas temperatures at the entrance of boiler convection pass for the baseline and modification cases
, figureFileSmall=null, figureFileBig=null, tableContent=
| 工况 | 最高温度 | 平均温度 |
|---|
| 基准工况 | 1 302.4 | 1 129.3 |
| 工况1 | 1 336.7 | 1 132.1 |
| 工况2 | 1 298.3 | 1 128.6 |
| 工况3 | 1 257.4 | 1 127.1 |
| 工况4 | 1 226.0 | 1 127.1 |
), ArticleFig(id=1211018030365151974, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1211002409757840150, language=CN, label=表5, caption=
基准工况和改造工况下锅炉对流烟道入口最高和平均烟气温度 单位:℃
, figureFileSmall=null, figureFileBig=null, tableContent=
| 工况 | 最高温度 | 平均温度 |
|---|
| 基准工况 | 1 302.4 | 1 129.3 |
| 工况1 | 1 336.7 | 1 132.1 |
| 工况2 | 1 298.3 | 1 128.6 |
| 工况3 | 1 257.4 | 1 127.1 |
| 工况4 | 1 226.0 | 1 127.1 |
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