Heat Transfer in Furnace of 1 000 MW Coal-fired Unit Under Different Load Conditions

doi:10.12096/j.2096-4528.pgt.19069

Abstract

Abstract:

A 3D coupled mathematical model of 1 000 MW ultra-supercritical tower boiler was established. Based on the design parameters of the boiler, the model calculated the flow and heat transfer process of the boiler in operation. The model was used to simulate different load conditions of the supercritical boiler. The boiler maximum continuous rating (BMCR) condition, 75% BMCR condition and 50% BMCR condition were selected to explore the heat transfer during peak shaving operation. By analyzing the temperature and heat flux distribution in the furnace and the temperature distribution in the tube and on the water cooled wall, it is found that the temperature and heat flux change of the BMCR, 75% BMCR are in the similar trend while the temperature change of the 50% BMCR is irregular, and the heat transfer deterioration is prone to occur in the spiral water cooled wall region.

Key words: ultra-supercritical boiler, 3D coupled simulation, heat transfer, peaking operation

Chu SHI,Ran LI,Zhen YANG,Yuanyuan DUAN. Heat Transfer in Furnace of 1 000 MW Coal-fired Unit Under Different Load Conditions[J]. Power Generation Technology, 2019, 40(3): 213-219.

References

1	方圆, 张万益, 曹佳文. 我国能源资源现状与发展趋势[J]. 矿产保护与利用, 2018, (4): 34- 42, 47.
2	马玉华, 邢长清, 徐君诏, 等. 深度调峰负荷时亚临界自然循环锅炉水循环安全计算与分析[J]. 热力发电, 2018, 47 (10): 108- 114.
3	马世英, 王青. 大规模新能源集中外送系统源网协调风险及仿真评估[J]. 发电技术, 2018, 39 (2): 112- 117.
4	史洁, 刘晓飞. 新能源功率预测算法优化研究[J]. 发电技术, 2019, 40 (1): 78- 82.
5	张广才, 周科, 鲁芬, 等. 燃煤机组深度调峰技术探讨[J]. 热力发电, 2017, 46 (9): 17- 23.
6	顾煜炯, 徐婧, 李倩倩, 等. 燃煤发电机组调峰能力模糊综合评估方法[J]. 热力发电, 2017, 46 (2): 15- 21.
7	邹兰青.规模风电并网条件下火电机组深度调峰多角度经济性分析[D].北京:华北电力大学, 2017.
8	谢冰瑶.1000 MW超超临界塔式褐煤锅炉炉内燃烧过程的数值研究[D].哈尔滨:哈尔滨工业大学, 2013.
9	蔡晓辉.600 MW超临界锅炉炉内燃烧过程数值模拟[D].保定:华北电力大学, 2010.
10	申春梅.1000 MW单炉膛双切圆锅炉炉内燃烧过程的数值模拟[D].哈尔滨工业大学, 2006.
11	武进猛.1000 MW超超临界锅炉炉内燃烧过程数值模拟[D].北京:华北电力大学, 2011.
12	Maidanik M N , Verbovetskii E K , Dekterev A A , et al. Mathematical simulation of the furnace and turning gas conduit of a P-50R boiler during joint combustion of solid and gaseous fuel[J]. Thermal Engineering, 2011, 58 (6): 483- 488.
13	方庆艳, 汪华剑, 陈刚, 等. 超超临界锅炉磨煤机组合运行方式优化数值模拟[J]. 中国电机工程学报, 2011, 31 (5): 1- 6.
14	丘全科.1000 MW超临界塔式锅炉传热模拟[D].北京:清华大学, 2016.
15	Senior C L , Srinivasachar S . Viscosity of ash particles in combustion systems for prediction of particle sticking[J]. Energy and Fuels, 1995, 9 (2): 209.
16	Wies?aw Z , Marzena N O . A new 1D/3D model of conjugate heat transfer in water wall tubes of power boiler combustion chamber[J]. Procedia Engineering, 2016, (157): 200- 206.
17	Vuthaluru R , Vuthaluru H B . Modelling of a wall fired furnace for different operating conditions using FLUENT[J]. Fuel Processing Technology, 2006, 87 (7): 633- 639.
18	Wang S Y , Yang D , Liu D , et al. Experimental and theoretical analysis on the safety and efficiency of an ultra-supercritical pulverized coal-fired boiler with low mass flux vertical water wall[J]. Applied Thermal Energy, 2019, (146): 440- 449.
19	Wang S Y , Yang D , Zhao Y J , et al. Heat transfer characteristics of spiral water wall tube in a 1000 MW ultra-supercritical boiler with wide operating load mode[J]. Applied Thermal Energy, 2018, (130): 501- 514.
20	Schuhbauer C , Angerer M , Spliethoff H , et al. Coupled simulation of a tangentially hard coal fired 700℃ boiler[J]. Fuel, 2014, (122): 149- 163.
21	Drosatos P , Nikolopoulos N , Agraniotis M , et al. Decoupled CFD simulation of furnace and heat exchangers in a lignite utility boiler[J]. Fuel, 2014, 117 (Part A): 633- 648.
22	国建刚, 孙宏, 孙冠男, 等. 超(超)临界锅炉与亚临界锅炉热控设计的区别[J]. 电站系统工程, 2012, 28 (5): 60- 62, 64.
23	岑可法. 高等燃烧学[M]. 杭州: 浙江大学出版社, 2002.
24	Baum M M , Street P J . Predicting the combustion behaviour of coal particles[J]. Combustion Science and Technology, 1971, 3 (5): 231- 43.
25	Field M A . Rate of combustion of size-graded fractions of char from a low-rank coal between 1200K and 2000K[J]. Combust Flame, 1969, 13 (3): 237- 52.
26	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.
27	叶新涛.浓淡旋流煤粉燃烧器的数值模拟与改进[D].郑州:郑州大学, 2009.
28	卢欢, 杨冬, 周旭, 等. 超临界直流锅炉水冷壁压降及出口汽温计算[J]. 西安交通大学学报, 2011, 45 (1): 38- 42.
29	王为术, 徐维晖, 李帅帅, 等. 1000 MW超超临界锅炉高热负荷区垂直水冷壁温度特性研究[J]. 电站系统工程, 2011, 27 (6): 9- 12.
30	何洪浩, 李文军, 曾俊, 等. 超超临界直流锅炉垂直管屏水冷壁壁温分布特性[J]. 动力工程学报, 2017, 37 (4): 257- 260, 292.
31	Chu Y , Lou C , Cheng Q , et al. Distributed parameter modeling and simulation for the evaporation system of a controlled circulation boiler based on 3-D combustion monitoring[J]. Applied Thermal Engineering, 2008, 28 (2/3): 164- 177.

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