Study of Water Wall Flow Distribution and Mass Outlet Temperature Distribution in Ultra-Supercritical Boiler Based on Pot-Furnace Coupling

doi:10.12096/j.2096-4528.pgt.260206

Abstract

Abstract:

Objectives Water wall over-temperature tube burst under deep peaking is one of the key problems facing the safe operation of boilers. A coupled boiler-furnace simulation method is proposed. Methods The heat flow distribution on the water wall surface under each operating condition is obtained by numerical simulation of combustion. Then, a calculation model of the mass side is established on the basis of Modelica, so as to study the distribution of water wall flow rate and the temperature distribution of the mass outlet of a 660 MW ultra-supercritical boiler. Results The errors of key parameters of water wall outlet mass are all within 3%, which verifies the reliability of the model. The spiral water wall flow distribution shows negative flow characteristics at high loads and positive flow characteristics at ultra-low loads. Vertical water wall always shows negative flow characteristics, and the maximum temperature difference of the vertical water wall outlet mass is 37.60 ℃ at 100% turbine heat acceptance (THA), and increases to 138.33 ℃ and 141.27 ℃ at 40% THA and 30% THA, respectively. The (ultra) low load vertical water wall outlet mass temperature of the front and rear walls is high and the temperature difference is large, while the outlet mass temperature of the left and right side walls is low and the temperature difference is small. Conclusions The research results can provide a reference for the safe operation of the boiler under deep peaking.

Key words: thermal power generation, boiler safety, flow distribution, working fluid temperature, hydrodynamics, boiler-furnace coupling, deep peaking

CLC Number:

TK 17

ZhiHai CHEN, Peng TAN, Fang WU, ShuTao XIE, Cheng ZHANG, QingYang FANG, Gang CHEN. Study of Water Wall Flow Distribution and Mass Outlet Temperature Distribution in Ultra-Supercritical Boiler Based on Pot-Furnace Coupling[J]. Power Generation Technology, 2026, 47(2): 285-294.

Figures/Tables 15

References 37

[1]	许洪华，邵桂萍，鄂春良，等．我国未来能源系统及能源转型现实路径研究[J]．发电技术，2023，44(4)：484-491． doi:10.12096/j.2096-4528.pgt.23002
	XU H H， SHAO G P， E C L，et al ．Research on China’s future energy system and the realistic path of energy transformation[J]．Power Generation Technology，2023，44(4)：484-491． doi:10.12096/j.2096-4528.pgt.23002
[2]	任卓亚，郭宁，解佗，等．我国清洁能源发展规律分析及其与经济系统的协调发展评价[J]．电网与清洁能源，2024，40(12)：128-134．
	REN Z Y， GUO N， XIE T，et al ．A study on the development patterns of clean energy in China and evaluation of its coordinated development with the economic system[J]．Power System and Clean Energy，2024，40(12)：128-134．
[3]	郭婷婷，曹蕃．低碳能源系统发展趋势与应用实践[J]．分布式能源，2025，10(1)：1-13． doi:10.16513/j.2096-2185.DE.(2025)010-01-0001-13
	GUO T T， CAO F ．Development trend and application of low-carbon energy system[J]．Distributed Energy，2025，10(1)：1-13． doi:10.16513/j.2096-2185.DE.(2025)010-01-0001-13
[4]	周太东，王泺，施训鹏．能源清洁转型与全球发展路径[J]．全球能源互联网，2024，7(6)：627-628．
	ZHOU T D， WANG L， SHI X P ．Clean energy transition and international development path[J]．Journal of Global Energy Interconnection，2024，7(6)：627-628．
[5]	国家发展改革委，国家能源局．“十四五”现代能源体系规划[EB/OL]．(2022-01-29)[2024-06-25]．．
	National Development and Reform Commission，National Energy Administration ．The 14th Five-Year Plan for the modern energy system[EB/OL]．(2022-01-29)[2024-06-25]．．
[6]	中国电力企业联合会．2023—2024年度全国电力供需形势分析预测报告[EB/OL]．(2024-01-30)[2024-06-25]．． doi:10.3969/j.issn.1009-5578.2017.02.003
	China Electricity Council ．Analysis and forecast report on national power supply and demand situation for 2023-2024[EB/OL]．(2024-01-30)[2024-06-25]．． doi:10.3969/j.issn.1009-5578.2017.02.003
[7]	MODLIŃSKI N， SZCZEPANEK K， NABAGŁO D，et al ．Mathematical procedure for predicting tube metal temperature in the second stage reheater of the operating flexibly steam boiler[J]．Applied Thermal Engineering，2019，146：854-865． doi:10.1016/j.applthermaleng.2018.10.063
[8]	黄越辉，卢慧，李建华，等．新能源极端出力特性及典型电力电量平衡场景研究[J]．电网与清洁能源，2024，40(2)：1-9．
	HUANG Y H， LU H， LI J H，et al ．A study on the characteristics of renewable energy extreme output and typical power and energy balancing scenarios for new type power systems[J]．Advances of Power System & Hydroelectric Engineering，2024，40(2)：1-9．
[9]	谢菁，吕涛，方德斌．低碳转型目标下的电力社会价值研究[J]．全球能源互联网，2024，7(6)：650-661．
	XIE J，LYU T， FANG D B ．The social value analysis of electric power considering the target of low-carbon transition[J]．Journal of Global Energy Interconnection，2024，7(6)：650-661．
[10]	闫群民，任效煜，宋潇，等．考虑源荷不确定性的电力系统灵活调度策略[J]．电力工程技术，2025，44(2)：172-184． doi:10.12158/j.2096-3203.2025.02.016
	YAN Q M， REN X Y， SONG X，et al ．Flexible scheduling strategy for power systems considering source-load uncertainty[J]．Electric Power Engineering Technology，2025，44(2)：172-184． doi:10.12158/j.2096-3203.2025.02.016
[11]	刘新苗，刘俊磊，娄源媛，等．基于时序模拟的风火打捆送出消纳规划优化方法[J]．南方电网技术，2025，19(8)：53-63． doi:10.13648/j.cnki.issn1674-0629.2025.08.006
	LIU X M， LIU J L， LOU Y Y，et al ．Planning optimization method for transmission and consumption of wind-thermal bundled based on time series simulation[J]．Southern Power System Technology，2025，19(8)：53-63． doi:10.13648/j.cnki.issn1674-0629.2025.08.006
[12]	刘志强，李建锋，潘荔，等．中国煤电机组改造升级效果分析与展望[J]．中国电力，2024，57(7)：1-11． doi:10.11930/j.issn.1004-9649.202402031
	LIU Z Q， LI J F， PAN L，et al ．Analysis and prospect of transformation and upgrading effects of coal-fired power units in China[J]．Electric Power，2024，57(7）：1-11． doi:10.11930/j.issn.1004-9649.202402031
[13]	王志轩，张晶杰，董博，等．“双碳”目标下燃煤电厂灵活性改造及政策建议[J]．电力科技与环保，2024，40(3)：213-220． doi:10.19944/j.eptep.1674-8069.2024.03.001
	WANG Z X， ZHANG J J， DONG B，et al ．Research on technology and policy of flexibility renovation for coal-fired power plants under carbon peaking and carbon neutrality goal[J]．Electric Power Technology and Environmental Protection，2024，40(3)：213-220． doi:10.19944/j.eptep.1674-8069.2024.03.001
[14]	严新荣，胡志勇，张鹏威，等．煤电机组运行灵活性提升技术研究与应用[J]．发电技术，2024，45(6)：1074-1086． doi:10.12096/j.2096-4528.pgt.24170
	YAN X R， HU Z Y， ZHANG P W，et al ．Research and application of operation flexibility improvement technology for coal-fired power unit[J]．Power Generation Technology，2024，45(6)：1074-1086． doi:10.12096/j.2096-4528.pgt.24170
[15]	YUE X， LIAO S， XU J，et al ．Collaborative optimization of renewable energy power systems integrating electrolytic aluminum load regulation and thermal power deep peak shaving[J]．Applied Energy，2024，373：123869． doi:10.1016/j.apenergy.2024.123869
[16]	倪晓滨，周克毅，徐青蓝．30%BMCR工况下超临界锅炉水冷壁水动力安全性评估[J]．发电设备，2021，35(3)：149-156． doi:10.19806/j.cnki.fdsb.2021.03.001
	NI X B， ZHOU K Y， XU Q L ．Hydrodynamic calculation and safety evaluation for the water wall in a supercritical boiler under 30% BMCR[J]．Power Equipment，2021，35(3)：149-156． doi:10.19806/j.cnki.fdsb.2021.03.001
[17]	聂鑫，杨冬，吕宏彪，等．某1 000 MW对冲燃烧超超临界锅炉水冷壁汽温偏差分析及设计运行对策[J]．中国电机工程学报，2019，39(3)：744-753． doi:10.13334/j.0258-8013.pcsee.180582
	NIE X， YANG D， LÜ H B，et al ．Analysis on the steam temperature deviation of water wall and the countermeasures of design and operation for a 1 000 MW ultra supercritical boiler with opposed firing[J]．Proceedings of the CSEE，2019，39(3)：744-753． doi:10.13334/j.0258-8013.pcsee.180582
[18]	邓启刚，吕卓，石友，等．不带外置床的700 MW超超临界循环流化床锅炉失电后水冷壁安全计算分析[J]．发电技术，2024，45(2)：240-249． doi:10.12096/j.2096-4528.pgt.23134
	DENG Q G， LÜ Z， SHI Y，et al ．Safety calculation and analysis of water wall for a 700 MW ultra-supercritical circulating fluidized bed boiler without external bed after power failure[J]．Power Generation Technology，2024，45(2)：240-249． doi:10.12096/j.2096-4528.pgt.23134
[19]	王为术，郭会军，上官闪闪，等．超临界锅炉螺旋水冷壁流量分配和壁温特性的研究[J]．热能动力工程，2016，31(1)：59-65． doi:10.16146/j.cnki.rndlgc.2016.01.010
	WANG W S， GUO H J， SHANGGUAN S S，et al ．Study of the flow rate distribution and wall temperature characteristics of the spirally-coiled tube water wall in a supercritical boiler[J]．Journal of Engineering for Thermal Energy and Power，2016，31(1)：59-65． doi:10.16146/j.cnki.rndlgc.2016.01.010
[20]	MAGNUSSEN B F， HJERTAGER B H ．On mathematical modeling of turbulent combustion with special emphasis on soot formation and combustion[J]．Symposium (International) on Combustion，1977，16(1)：719-729． doi:10.1016/S0082-0784(77)80366-4
[21]	董乐，辛亚飞，李娟，等．660 MW超超临界循环流化床锅炉水动力及流动不稳定特性计算分析[J]．中国电机工程学报，2020，40(5)：1545-1554． doi:10.13334/j.0258-8013.pcsee.191718
	DONG L， XIN Y F， LI J，et al ．Computational analysis on thermal-hydraulic characteristics and flow instability of a 660 MW ultra-supercritical circulating fluidized bed boiler[J]．Proceedings of the CSEE，2020，40(5)：1545-1554． doi:10.13334/j.0258-8013.pcsee.191718
[22]	唐斌，顾君苹，张缦，等．350 MW超临界循环流化床锅炉水冷壁流量分配及壁温计算[J]．煤炭学报，2016，41(10)：2560-2567． doi:10.13225/j.cnki.jccs.2016.8016
	TANG B， GU J P， ZHANG M，et al ．Calculation on distribution of flow rate and temperature in water wall of 350 MW supercritical circulating fluidized bed boiler[J]．Journal of China Coal Society，2016，41(10)：2560-2567． doi:10.13225/j.cnki.jccs.2016.8016
[23]	滕敏华，胡卿，万李，等．1 000 MW宽负荷超超临界机组锅炉水动力特性计算及分析[J]．热力发电，2019，48(4)：60-67． doi:10.19666/j.rlfd.201809193
	TENG M H， HU Q， WAN L，et al ．Calculation and analysis on hydrodynamic characteristics of an ultra-supercritical unit boiler with 1 000 MW broad regulation load[J]．Thermal Power Generation，2019，48(4)：60-67． doi:10.19666/j.rlfd.201809193
[24]	ZIMA W， NOWAK-OCŁOŃ M， OCŁOŃ P ．Simulation of fluid heating in combustion chamber waterwalls of boilers for supercritical steam parameters[J]．Energy，2015，92：117-127． doi:10.1016/j.energy.2015.02.111
[25]	KHAUSTOV S A， ZAVORIN A S， BUVAKOV K V，et al ．Computer simulation of the fire-tube boiler hydrodynamics[J]．EPJ Web of Conferences，2015，82：01039．
[26]	ELGANDELWAR A M， JHA R S， LELE M M ． Steady-state flow distribution analysis of natural circulation in water tube boiler[J]．Computational Thermal Sciences，2020，12(3)：275-288． doi:10.1615/computthermalscien.2020033963
[27]	XUE W， LU Y， WANG Z，et al ．Reconstructing near-water-wall temperature in coal-fired boilers using improved transfer learning and hidden layer configuration optimization[J]．Energy，2024，294：130860． doi:10.1016/j.energy.2024.130860
[28]	姚杨，陈鑫科，马仑，等．某1 000 MW双切圆锅炉燃烧侧和工质侧耦合建模及应用[J/OL]．中国电机工程学报，1-14[2024-06-29]．．
	YAO Y， CHEN X K， MA L，et al ．Coupled modeling and application of combustion-side and mass-side coupling in a 1000 MW double-cut circular boiler[J/OL]．Chinese Journal of Electrical Engineering，1-14[2024-06-29]．．
[29]	安吉华，马庆华，张一帆，等．超超临界1 000 MW二次再热机组塔式锅炉水动力特性及壁温分布规律[J]．热力发电，2018，47(12)：134-140．
	AN J H， MA Q H， ZHANG Y F，et al ．Thermal hydrodynamic characteristics and wall temperature distribution of an ultra-supercritical 1 000 MW unit double-reheat tower type boiler[J]．Thermal Power Generation，2018，47(12)：134-140．
[30]	庞力平，袁虎，丘文生，等．深度调峰锅炉水动力特性分析[J]．化工进展，2023，42(4)：1708-1718． doi:10.16085/j.issn.1000-6613.2022-1143
	PANG L P， YUAN H， QIU W S，et al ．Hydrodynamic characteristics during peaking operation in utility boiler[J]．Chemical Industry and Engineering Progress，2023，42(4)：1708-1718． doi:10.16085/j.issn.1000-6613.2022-1143
[31]	王超，王研凯，陈相如，等．660 MW超临界直流锅炉水冷壁动态特性仿真研究[J]．动力工程学报，2024，44(7)：1001-1009． doi:10.19805/j.cnki.jcspe.2024.230297
	WANG C， WANG Y K， CHEN X R，et al ．Simulation study on dynamic characteristics of water-cooled wall of a 660 MW supercritical once-through boiler[J]．Journal of Chinese Society of Power Engineering，2024，44(7)：1001-1009． doi:10.19805/j.cnki.jcspe.2024.230297
[32]	方庆艳，周怀春，汪华剑，等．W火焰锅炉结渣特性数值模拟[J]．中国电机工程学报，2008，28(23)：1-7． doi:10.3321/j.issn:1000-6761.2008.05.005
	FANG Q Y， ZHOU H C， WANG H J，et al ．Numerical simulation of the ash deposition characteristics in a W-flame boiler furnace[J]．Proceedings of the CSEE，2008，28(23)：1-7． doi:10.3321/j.issn:1000-6761.2008.05.005
[33]	MAJUMDAR A K， SPALDING D B ．Numerical computation of Taylor vortices[J]．Journal of Fluid Mechanics，1977，81(2)：295-304． doi:10.1017/S0022112077002043
[34]	LAUNDER B E， SPALDING D B ．Lectures in mathematical models of turbulence[M]．London，New York：Academic Press，1972：8-11．
[35]	FANG Q， MUSA A A B， WEI Y，et al ．Numerical simulation of multifuel combustion in a 200 MW tangentially fired utility boiler[J]．Energy & Fuels，2012，26(1)：313-323． doi:10.1021/ef201149p
[36]	BAUM M M， STREET P J ．Predicting the combustion behaviour of coal particles[J]．Combustion Science and Technology，1971，3(5)：231-243． doi:10.1080/00102207108952290
[37]	TAN P， MA L， FANG Q，et al ．Application of different combustion models for simulating the co-combustion of sludge with coal in a 100 MW tangentially coal-fired utility boiler[J]．Energy & Fuels，2016，30(3)：1685-1692． doi:10.1021/acs.energyfuels.5b02236

参数	数值
炉膛宽度/mm	22 162.4
炉膛深度/mm	15 456.8
炉膛容积/m³	19 722.0
炉膛断面积/m²	342.6
顶棚拐点标高/mm	72 500.0
相邻燃烧器中心线之间的水平距离/mm	3 048.0
顶层燃烧器至屏底的距离/mm	26 353.5
底层燃烧器至冷灰斗折角的距离/mm	2 397.7
燃尽风至燃烧器的距离/mm	5 980.8
水冷壁下集箱标高/mm	7 500.0

参数	数值
炉膛宽度/mm	22 162.4
炉膛深度/mm	15 456.8
炉膛容积/m³	19 722.0
炉膛断面积/m²	342.6
顶棚拐点标高/mm	72 500.0
相邻燃烧器中心线之间的水平距离/mm	3 048.0
顶层燃烧器至屏底的距离/mm	26 353.5
底层燃烧器至冷灰斗折角的距离/mm	2 397.7
燃尽风至燃烧器的距离/mm	5 980.8
水冷壁下集箱标高/mm	7 500.0

模型类型	主要子模型
湍流流动模型	Realizable k-ε模型^[33-34]
颗粒运动模型	P1模型^[35]
煤粉挥发分模型	单速率方程反应模型^[20]
焦炭燃烧模型	动力-扩散模型^[36]
气相燃烧模型	PDF模型^[37]

模型类型	主要子模型
湍流流动模型	Realizable k-ε模型^[33-34]
颗粒运动模型	P1模型^[35]
煤粉挥发分模型	单速率方程反应模型^[20]
焦炭燃烧模型	动力-扩散模型^[36]
气相燃烧模型	PDF模型^[37]

参数		数值
工业分析	收到基水分质量分数/%	12.7
	收到基灰分质量分数/%	12.54
	收到基挥发分质量分数/%	20.43
	收到基固定碳质量分数/%	54.33
元素分析	收到基碳元素质量分数/%	80.94
	收到基氢元素质量分数/%	4.84
	收到基氧元素质量分数/%	12.47
	收到基氮元素质量分数/%	0.94
	收到基硫元素质量分数/%	0.82
低位发热量Q_net，ar/(MJ/kg)		22.8