Furnace Structure Design Optimization of 300MW S-CO2 Single Reheat Coal-fired Boiler

被引：0
|
作者：
Tong Y. [1 ]
Duan L. [1 ]
Pang L. [1 ]
机构：
[1] School of Energy Power and Mechanical Engineering, North China Electric Power University, Changping District, Beijing
来源：
Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering | 2020年 / 40卷 / 17期
关键词：
Coal-fired boiler; Furnace structure design; Non-uniformity coefficient; Supercritical CO[!sub]2[!/sub](S-CO[!sub]2[!/sub]) cycle;
D O I：
10.13334/j.0258-8013.pcsee.200100
中图分类号：
学科分类号：
摘要：
On the base of 300 MW split-flow recompression and single reheat supercritical CO2 (S-CO2) Brayton cycle, the layout of boiler heating surface optimized. In order to solve the problems of large pressure drop of working fluid and high temperature of furnace tube wall, the furnace structure of S-CO2 boiler was optimized. In the optimization scheme, furnace of S-CO2 boiler adopts the single furnace double-tangential circle and the vertical tube structure. The system performance analysis model was built, and both the working fluid pressure drop of furnace side and the temperature of tube wall were calculated and compared with those of the original scheme. The results show that under the design load, the pressure drops of both the superheated cooling wall and the reheated cooling wall in the optimization scheme are obviously reduced. After optimization, due to the decrease of working fluid pressure loss, the power generation efficiency increases and the standard coal consumption of power generation decreases. Under the design load, the system standard coal consumption of power generation is reduced by 2.8g/(kW∙h). Along the furnace height direction, the maximum temperature of the tube outer wall in the optimization scheme is obviously lower than that of the original scheme, which shows that the optimization scheme has a wider safety margin, so as to ensure the safe operation of the unit. © 2020 Chin. Soc. for Elec. Eng.
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页码：5557 / 5565
页数：8
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