Design and Economic Analysis of Adjustable Ten-Stage Heat Regeneration System for 1 000-MW Ultra-Supercritical Unit

doi:10.11930/j.issn.1004-9649.2015.12.74.4

Abstract

Abstract: In this paper, the in-depth study is conducted on the feasibility and economics of the adjustable ten-stage heat regeneration system for the two 1 000-MW ultra-supercritical units with one reheat cycle in Shenhua Guohua Yongzhou Power Plant (2×1 000 MW) Phase I Project. The serial No.0 high-pressure heater, equipped with the control valve to regulate the extraction pressure, is placed upstream the outer steam cooler. Under the partial load conditions, compared with the ten-stage heat regeneration system with nonadjustable stage, the initial steam pressure of the No.0 HP heater and the feedwater temperature are both improved, which lowers the turbine heat rate by 12~38 kJ/kWh, showing significant decrease of coal consumption. As a result, the total comprehensive benefit of the two units in 20 years can be as much as 53.08 million yuan.

Key words: thermal generation unit, ultra-supercritical unit, ten-stage heat regeneration system, heat rate, coal consumption

CLC Number:

TM521

XU Hongbo, CHEN Qing. Design and Economic Analysis of Adjustable Ten-Stage Heat Regeneration System for 1 000-MW Ultra-Supercritical Unit[J]. Electric Power, 2015, 48(12): 74-78.

Add to citation manager EndNote|Ris|BibTeX

URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.2015.12.74.4

https://www.electricpower.com.cn/EN/Y2015/V48/I12/74

References

[1] 彭泽英. 独特结构是提高汽轮机效率的关键因素[J]. 热力透平,2008,37（4）：225-229.
PENG Zeying. Unique advanced structure design is key to improve turbine efficiency[J]. Thermal Turbine, 2008, 37(4): 225-229.
[2] 叶勇健,申松林. 欧洲高效燃煤电厂的特点及启示[J]. 电力建设,2011,32（1）：54-58.
YE Yongjian, SHEN Songlin. Characteristics of european high- efficiency coal fired units and their implications for Chinese power plant [J]. Electric Power Construction, 2011, 32(1): 54-58.
[3] 乌若思. 超超临界发电技术研究与应用[J]. 中国电力,2006,39（6）：34-37.
WU Ruosi. Research and application of ultra supercritical power generation technology in China[J]. Electric Power, 2006, 39(6):34-37.
[4] 王卫良,李永生. 大型汽轮机组2次再热回热系统关键技术研究[J]. 热力发电,2013,42（11）： 49-53.
WANG Weiliang, LI Yongsheng. Key technologies of double reheat & heat regeneration systems for large scale steam turbines[J]. Thermal Power Generation, 2013, 42(11): 49-53.
[5] 沈邱农,陈文辉. 超超临界汽轮机的技术特点[J]. 动力工程,2002,22（2）：1659-1663.
SHEN Qiunong, CHEN Wenhui. Technical characters for ultra- supercritical steam turbine[J]. Power Engineering, 2002, 22(2): 1659-1663.
[6] 冯德明,付焕兴. 新一代1 000 MW高效一次再热机组技术在神华重庆万州工程中的应用[C]//超超临界机组技术交流2013年会. 天津,2013：43-49.
[7] 牛中敏,丁一雨. 超超临界1 000 MW机组设置外置蒸汽冷却器的经济性分析[J]. 热力发电,2011,40（12）：67-69.
NIU Zhongmin, DING Yiyu. Analysis of thermal economy of installing external steam cooler for ultra-supercritical 1 000 MW unit [J]. Thermal Power Generation, 2011, 40(12): 67-69.
[9] 朱光明,焦庆丰,李明,等. 大型火电机组低负荷运行经济性研究[J]. 湖南电力,2008,28（1）：24-34.
ZHU Guangming, JIAO Qingfeng, LI Ming, et al . Research on economic efficiency of low load operation in large thermal power units [J]. Hunan Electric Power, 2008, 28(1): 24-34.
[9] 孙伟鹏,孙叶柱. 超超临界机组瞬变负荷对供电煤耗率的影响[J]. 中国电力,2012,45（1）：20-24.
SUN Weipeng, SUN Yezhu. The influence of instantaneously variable load on coal consumption rate in ultra supercritical unit[J]. Electric Power, 2012, 45(1): 20-24.
[10] 杜和冲,吴克锋,申建东,等. 烟气深度冷却系统在1 000 MW超超临界机组的应用[J]. 中国电力,2014,47（4）：32-37.
DU Hechong, WU Kefeng, SHEN Jiandong, et al . Application of flue gas deep cooling system in 1 000-MW ultra-supercritical units [J]. Electric Power, 2014, 47(4): 32-37.

[1]	LI Zhangyi, MA Xin, PEI Wei, ZHANG Liang, LIU Mingshuang, LIANG Qiuhong. Leader-Follower Game Mechanism and Strategy of Industrial Park Demand Response with User Aggregator [J]. Electric Power, 2020, 53(8): 40-49.
[2]	TENG Da, LI Tielin, LI Ang, AN Liansuo, CHEN Haiping, SHEN Guoqing. System Characteristic Analysis of Waste Heat Recovery and Cascade Utilization of Tail Flue Gas of Power Boiler [J]. Electric Power, 2020, 53(7): 189-196.
[3]	LI Yikun, CHE Quan, ZHAO Huirong, PENG Daogang. PSO-SVM-Based Rolling Forecast of Coal Consumption Reference Value for the Power Plants Dispatched by Power Grid [J]. Electric Power, 2020, 53(2): 142-149.
[4]	LUN Tao, E Zhijun, ZHANG Li, WANG Xin, ZHAO Yongliang, YAN Junjie. Thermo-economic Analysis on Four Regulation Schemes with Different Flexibilities for Primary Frequency Regulation Control in a Coal-Fired Power Plant [J]. Electric Power, 2019, 52(8): 164-172.
[5]	HU Jian, LIU Chao. Application Study on CPSO-FLN Model in the Steam Turbine Heat Rate Forecast [J]. Electric Power, 2019, 52(8): 179-184.
[6]	ZHAO Yongliang, DIAO Baosheng, HAN Xiang, LIU Ming, WANG Zhu, CHONG Daotong, YAN Junjie. Simulation Study on the Dynamic Characteristics of a 660 MW Supercritical Coal-Fired Power Unit During AGC Processes [J]. Electric Power, 2019, 52(5): 13-20.
[7]	ZHANG Jinying, SUN Jiguang. Centralized Coordination Control of Ultra-supercritical Unit Based on Control-Constrained MIMO Predictive Control [J]. Electric Power, 2019, 52(5): 21-28.
[8]	LIU Fuguo, ZHANG Xuhui, WU Ju, CUI Fuxing. Diagnostic Analysis of Daily Coal Consumption Rate in Coal Fired Unit Based on Data Reconciliation [J]. Electric Power, 2019, 52(11): 118-124.
[9]	WANG Ya'ou, TAO Qian, XIAO Jie, CHEN Bo. Water-Wall Temperature Control of a 1 000 MW Dual Circle Tangential Firing Boiler during Wet-Dry Transferring Period [J]. Electric Power, 2019, 52(1): 161-165,173.
[10]	YAN Xiaokun, JIAO Kaiming, XU Cheng. Thermo-economic Analysis of a Blending Coal-fired Power Plant [J]. Electric Power, 2018, 51(9): 8-14.
[11]	MU Chunhua, LV Kai, XU Pengjiang, SUN Dawei, WU Pengyue, MA Tingshan, JU Wenping, LI Dongquan. Application of Unified Power-Regulating System of Auxiliary Equipment on a 660 MW Unit [J]. Electric Power, 2018, 51(9): 65-72.
[12]	YU Baoqing, PENG Xingna, CONG Xiangzhou, PENG Xiankuan, DU Zhanjiang, GAO Zhi. Cause Analysis and Prevention of Drainage-Tank Leakage in Ultra-supercritical Power Plant [J]. Electric Power, 2018, 51(9): 83-87,150.
[13]	ZUO Zhike, CHEN Guobin, LIU Chao, NIU Peifeng. Prediction Model of Steam Turbine Heat Rate Based on CNGWO-LSSVM [J]. Electric Power, 2018, 51(8): 148-153.
[14]	XIAO Jiafan, TAN Houzhang, LIU Hexin, WANG Yibin, DONG Kun. Analysis on Ammonium Sulfate Deposition in Tail Flue of a 1 000-MW Ultra-supercritical Coal-Fired Unit [J]. Electric Power, 2018, 51(4): 67-74.
[15]	ZHANG Lei, ZHANG Junjie, FENG Liguo, QIAO Jiafei, XU Yatao. Research and Application of Flow Path Retrofit Upgrade of the Subcritical 600 MW Turbine in Ninghai Power Plant [J]. Electric Power, 2018, 51(4): 89-95.