Research on the Method of Depth Peaking at Full Load of Supercritical Circulating Fluidized Bed Unit

doi:10.12096/j.2096-4528.pgt.20024

Abstract

Abstract:

With the expansion of installed capacity of new energy power generation, the thermal power market has been severely squeezed. To meet the needs of grid flexibility, thermal power plants are required to undertake the task of deep peak shaving. Circulating fluidized bed units can be used without shutdown. It takes a supercritical 350MW circulating fluidized bed unit in a power plant in Shanxi Province as the research object. Two kinds of deep peak shaving methods of supercritical circulating fluidized bed unit's typical steam-water systems were analyzed. Some problems that might be encountered during operation were analyzed. Corresponding prevention and control measures were provided. Finally, the analysis shows that the supercritical circulating fluidized bed unit can use two typical steam-water systems to achieve full load deep peak shaving. The investment of adding boiler water circulating pump system is large, and the operation is complex. The investment of adding water storage tank to deaerator pipeline is small, and the operation is simple. However, when the boiler water circulating pump system is added to participate in full load deep peak shaving, the stability of each system is better.

Key words: supercritical circulating fluidized bed unit, depth peaking, separator, water storage tank, deaerator

CLC Number:

TK175

Bin NIU, Lifeng LI, Qian SUN, Peihua ZHANG. Research on the Method of Depth Peaking at Full Load of Supercritical Circulating Fluidized Bed Unit[J]. Power Generation Technology, 2021, 42(2): 273-279.

Figures/Tables 3

References 16

1	张广才, 周科, 柳宏刚. 某超临界600MW机组直流炉深度调峰实践[J]. 热力发电, 2018, 47 (5): 83- 88.
	ZHANG G C , ZHOU K , LIU H G , et al. Practice of deep peak load regulation or a 600MW supercritical concurrent boiler[J]. Thermal Power Generation, 2018, 47 (5): 83- 88.
2	王林, 伍刚, 张亚夫, 等. 1000 MW深度调峰机组热力系统优化研究[J]. 发电技术, 2019, 40 (3): 265- 269.
	WANG L , WU G , ZHANG Y F , et al. Thermodyna-mic system optimization research on 1000 MW deep peak-regulating unit[J]. Power Generation Technology, 2019, 40 (3): 265- 269.
3	董民中, 任瑞利. 如何延长流化床锅炉的压火维持时间[J]. 节能与环保, 2001, 2 (2): 43- 44.
	DONG M Z , REN R L . How to extend the pressure maintenance time of a fluidized bed boiler[J]. Energy Conservation and Environmental Protection, 2001, 2 (2): 43- 44.
4	陈文成. 带炉水循环泵直流炉启动阶段给水流量控制[J]. 热力发电, 2014, 43 (2): 100- 103. DOI
	CHEN W C . Water flow control start-up of an ultra supercritical 600MW unit once-through boiler with circulating pump[J]. Thermal Power Generation, 2014, 43 (2): 100- 103. DOI URL
5	张磊. 炉水循环泵运行及故障分析[J]. 华电技术, 2017, 39 (6): 62- 64.
	ZHANG L . Operation and failure analysis of boiler-water circulating pump[J]. Huadian Technology, 2017, 39 (6): 62- 64.
6	卢靖国. 循环流化床锅炉压火及热态启动过程中防汽温超温的措施[J]. 现代工业经济和信息化, 2015, 5 (4): 65- 66. DOI
	LU J G . Circulating fluidized bed boiler pressure fire and hot steam overtemperature measures in the process of hot start-up[J]. Modern Industrial Economy and Informationization, 2015, 5 (4): 65- 66. DOI
7	李建军, 魏智诚, 李自强, 等. 300MW锅炉压火及热态启动[J]. 内蒙古科技与经济, 2012, 253 (3): 105- 109. DOI
	LI J J , WEI Z C , LI Z Q , et al. Pressure and hot start of 300MW boiler[J]. Inner Mongolia Science Technology and Economy, 2012, 253 (3): 105- 109. DOI
8	赵峰, 周红梅, 宁罡. 不带炉水循环泵直流炉增加冷凝水箱至除氧器管道的结构改造[J]. 电站系统工程, 2012, 28 (4): 49- 52. DOI
	ZHAO F , ZHOU H M , NING G . Reformation of adding a pipe between condensate water tank and deaerator for to boiler without boiler water circulating pump[J]. Power System Engineering, 2012, 28 (4): 49- 52. DOI
9	刘占春, 李琳娜. 提高除氧器排汽回收量[J]. 冶金设备, 2017, 239 (2): 422- 425.
	LIU Z C , LI L N . Increasing the recovery of deaerator exhaust steam[J]. Metallurgical Equipment, 2017, 239 (2): 422- 425.
10	郭君. 浅析600MW超临界直流火电机组深度调峰技术措施及运行注意事项[J]. 电气工程与自动化, 2018, 27 (4): 7- 8.
	GUO J . Brief analysis of technical measures and operational precautions for deep peak regulation of 600MW supercritical DC thermal power units[J]. Electrical Engineering and Automation, 2018, 27 (4): 7- 8.
11	刘大猛, 罗小鹏, 陈玉忠, 等. 超临界无炉水循环泵机组启动初期屏式过热器超温分析及控制[J]. 锅炉技术, 2015, 46 (4): 77- 80.
	LIU D M , LUO X P , CHEN Y Z , et al. The analysis and control of platen superheater over temperature for supercritical unit without BCP at initial stage of start-up[J]. Boiler Technology, 2015, 46 (4): 77- 80.
12	胡乃威. 浅析循环流化床锅炉结焦事故原因及预防[J]. 山东工业技术, 2018, 6 (6): 9- 10.
	HU N W . Analysis on the causes and prevention of coking accidents in circulating fluidized bed boilers[J]. Shandong Industrial Technology, 2018, 6 (6): 9- 10.
13	陶树成, 高子义, 曹献波, 等. 220t/h循环流化床锅炉的安全压火及热态启动探讨[J]. 内蒙古电力技术, 2009, 27 (5): 100- 104.
	TAO S C , GAO Z Y , CAO X B , et al. Discussion of safety fire blanking and boiler hot start-up to 220t/h circulating fluidized bed boiler[J]. Inner Mongolia Electric Power, 2009, 27 (5): 100- 104.
14	李寿军, 刘卫强. 300MW循环流化床锅炉及热态启动操作方法探讨[J]. 内蒙古电力技术, 2011, 29 (3): 102- 104.
	LI S J , LIU W Q . Discussion of operation method for 300MW CFB boiler banked fire and hot start-up[J]. Inner Mongolia Electric Power, 2011, 29 (3): 102- 104.
15	许明, 王少静, 徐瑞. 浅谈低速循环流化床锅炉的结焦与灭火的现象及预防措施[J]. 化学工程与装备, 2012, 10 (1): 172- 174.
	XU M , WANG S J , XU R . Talking about the phenomenon of coking and fire suppression in low-speed circulating fluidized bed boilers and preventive measures[J]. Chemical Engineering & Equipment, 2012, 10 (1): 72- 174.
16	孙献斌, 戚峰, 辛以振, 等. 330 MW循环流化床锅炉燃烧调整试验研究[J]. 发电技术, 2019, 40 (3): 281- 285.
	SUN X B , QI F , XIN Y Z , et al. Test study on combustion adjustment of 330 MW circulating fluidized bed boiler[J]. Power Generation Technology, 2019, 40 (3): 281- 285.

名称	BMCR	BRL
过热器出口压力/MPa	25.31	25.31
过热器出口温度/℃	571	571
锅炉蒸发量/(t/h)	1 184	1 127.94
再热器出口压力/MPa	4.54	4.298
再热器出口温度/℃	568	568

名称	BMCR	BRL
过热器出口压力/MPa	25.31	25.31
过热器出口温度/℃	571	571
锅炉蒸发量/(t/h)	1 184	1 127.94
再热器出口压力/MPa	4.54	4.298
再热器出口温度/℃	568	568

[1]	Shuaishuai YAN, Yang LU, Wenhui HOU, Kai LIU. Smart Separator Materials of Intrinsic Safe Lithium Battery for Large-scale Electric Energy Storge [J]. Power Generation Technology, 2022, 43(5): 792-800.
[2]	Feng ZHAO, Mingxing SUN, Zhefeng HAO, Deyong CHE. Structure Optimization of Cyclone Separator Based on Computational Particle Fluid Dynamics [J]. Power Generation Technology, 2021, 42(5): 637-642.
[3]	Li PENG, Zhansheng SHI, Fang DONG. Structure Optimization of Cyclone Separator Based on CFD-DPM [J]. Power Generation Technology, 2021, 42(3): 343-349.
[4]	Xiuqiang CUI. Experimental Investigations and Application of Operational Characteristics for Bowl Pulverizer [J]. Power Generation Technology, 2019, 40(2): 187-191.
[5]	MA Long-xin, SUN Ke, HE Jun, ZHENG Jian. Application Analysis of Dynamic Separator in a Power Plant Unit Reformation [J]. Power Generation Technology, 2017, 38(3): 40-42.
[6]	ZHANG Shi-long, LIU Qing-chao, ZHANG Jun, WEI Chao, FENG Yi-ming, YANG Yu, TANG Zi-peng, ZHANG Yin-long, ZHANG Yong-ming. A Deaerator Automatic Regulating Oxygen Concentration Device and Method Research [J]. Power Generation Technology, 2017, 38(1): 66-68.