|
|
|
| Analysis and modification of 600MW super-critical thermal power unit’s feed-water heat recovery system |
| Li Tao |
| CLP Business Management (Beijing) Co., Ltd, Beijing 100004 |
|
|
|
|
Abstract The performance of domestic coal fired units’ single reheat system also has space to be improved. Main reason is that the third section steam extraction of the unit has super high superheat, resulting in excessive heat exchange temperature difference and unreasonable utilization of energy level, and resulting in the increase of irreversible loss. The current reform measures more common with outside steam cooler, and lower pressure heat exchanger design, to improve the thermal efficiency by improving the efficiency of power generation units in general. Based on 600 MW the supercritical unit of a coal-fired power plant, the comprehensive analysis of the technical improvement measures and the thermal economy of the unit can be used to improve the efficiency of the unit, which could provide important theoretical basis for steam turbine design and retrofit of units.
|
|
Received: 23 November 2017
Published: 17 July 2018
|
|
|
|
| Cite this article: |
|
Li Tao. Analysis and modification of 600MW super-critical thermal power unit’s feed-water heat recovery system[J]. Electrical Engineering, 2018, 19(7): 78-82.
|
|
|
|
| URL: |
|
http://dqjs.cesmedia.cn/EN/Y2018/V19/I7/78
|
[1] 蒋松含, 李中豪, 张沛超, 等. 燃气-蒸汽联合循环机组的实时数字仿真建模[J]. 电力系统保护与控制, 2015, 43(20): 137-142.
[2] 肖浩, 裴玮, 邓卫, 等. 分布式电源对配电网电压的影响分析及其优化控制策略[J]. 电工技术学报, 2016, 31(S1): 203-213.
[3] 沈鑫, 曹敏. 分布式电源并网对于配电网的影响研究[J]. 电工技术学报, 2015, 30(S1): 346-351.
[4] 范士雄, 蒲天骄, 刘广一, 等. 主动配电网中分布式发电系统接入技术及其进展[J]. 电工技术学报, 2016, 31(S2): 92-101.
[5] 马芳礼, 孙君秣. 采用串联独立抽汽冷却器和加大给水加热焓升提高大型汽轮机组热效率[J]. 中国电机工程学报, 1981(1): 59-66.
[6] 刘志真, 李岩, 程新华. 装设外置式蒸汽冷却器的再热机组再热之后第一级抽汽位置对热经济性的影响[J]. 汽轮机技术, 2004, 46(5): 382-384, 387.
[7] 王汝武, 曹猛. 提高热电厂效率的几项措施[J]. 节能, 2007, 26(3): 41-44.
[8] 张书迎, 高永芬, 李琳, 等.火力发电厂给水加热系统中的外置并联式蒸汽冷却器: CN203478195U[P]. 2014.
[9] 付旭, 丁建设, 潘军民, 等. 基于模型预测控制的火电厂主蒸汽温度优化[J]. 电气技术, 2014, 15(1): 126-127.
[10] 东方电气研制的国内首台超超临界二次再热机组成功投运[J]. 电气技术, 2015, 16(7): 10.
[11] 李帅, 沈翔宇, 尹金亮. 哈汽1000MW汽轮机快冷方法应用研究[J]. 能源与节能, 2017(10): 169-171.
[12] 赵振宁, 张清峰, 赵振宙. 电站锅炉性能试验原理,方法及计算[M]. 北京: 中国电力出版社, 2010.
[13] 徐传海. 1000MW机组高压加热器上端差取值建议[J]. 电力建设, 2007, 28(7): 48-49.
[14] 廖军林, 党小建. 220MW机组低压加热器疏水不畅分析及改造[J]. 电力建设, 2012, 33(11): 46-48. |
|
|
|
2018, Vol. 19 
