Research and Application of Deep Peak Shaving of 350 MW Supercritical Fluidized Bed Unit

doi:10.12096/j.2096-4528.pgt.22134

Abstract

Abstract:

Objectives In order to master the deep peak shaving capability of supercritical circulating fluidized bed units and scientifically participate in the auxiliary service market, it is necessary to conduct in-depth research on the deep peak shaving performance of existing units. Methods From the three dimensions of safety, economy and environmental protection, 40% and 30% of rated load continuous trial operation, boiler combustion optimization adjustment, boiler efficiency and steam turbine heat consumption rate performance tests were carried out, respectively.More than 10 optimization measures such as single pump operation of feed water pump, pressure curve optimization, boiler oxygen amount, bed pressure adjustment, etc., were implemented. Results The continuous operation of 30% rated load for 12 consecutive days was realized, 40% and 30% rated load depth peak-monasizing the peaks affected coal consumption by about 52%, 72 g/(kW·h), respectively. Conclusions The 350 MW supercritical circulating fluidized bed unit has good deep peak shaving ability. There is no need to transform 30% rated load conditions, and inject oil to stabilize combustion and maintain high efficiency of the boiler. Monitoring parameters for the steam turbine generator unit body, thermal system and auxiliary equipment are normal. The main flue gas pollutants are ultra-low emission.

Key words: circulating fluidized bed, deep peak shaving, operation optimization, flexibility retrofit, safety, economy

CLC Number:

TK 227

Huasong DAI, Shaoxu PU, Guoxu CHAI, Li JIN, Weiping CHEN, Mingliang XIE. Research and Application of Deep Peak Shaving of 350 MW Supercritical Fluidized Bed Unit[J]. Power Generation Technology, 2024, 45(3): 401-411.

Figures/Tables 16

References 22

1	岳光溪，吕俊复，徐鹏，等．循环流化床燃烧发展现状及前景分析[J]．中国电力，2016，49(1)：1-13．
	YUE G X， LV J F， XU P，et al ．Development status and prospect analysis of circulating fluidized bed combustion[J]．China Electric Power，2016，49(1)：1-13．
2	张少强，陈露，刘子易，等．大型燃煤锅炉深度调峰关键问题探讨[J]．南方能源建设，2022，9(3)：16-28． doi:10.16516/j.gedi.issn2095-8676.2022.03.003
	CHEN S Q， CHEN L， LIU Z Y，et al ．Discussion on key problems of depth peak adjustment for large coal-fired boilers[J]．Southern Energy Construction，2022，9(3)：16-28． doi:10.16516/j.gedi.issn2095-8676.2022.03.003
3	刘云锋，李宇峰，王健，等．汽轮机深度调峰的水蚀问题研究[J]．发电技术，2021，42(4)：473-479． doi:10.12096/j.2096-4528.pgt.21012
	LIU Y F， LI Y F， WANG J，et al ．Research on water erosion in deep peak shaving of steam turbines[J]．Power Generation Technology，2021，42(4)：473-479． doi:10.12096/j.2096-4528.pgt.21012
4	王林，伍刚，张亚夫，等．1 000 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． doi:10.12096/j.2096-4528.pgt.18178
	WANG L， WU G， ZHANG Y F，et al ．Research on thermal system optimization of 1 000 MW deep peak-shaving units[J]．Power Generation Technology，2019，40(3)：265-269． doi:10.12096/j.2096-4528.pgt.18178
5	李伟，蔡勇，张晓磊，等．深度调峰工况锅炉主要辅机运行安全性分析[J]．广东电力，2019，32(11)：63-69． doi:10.3969/j.issn.1007-290X.2019.011.008
	LI W， CAI Y， ZHANG X L，et al ．Operational safety analysis of main auxiliary boilers in deep peak shaving conditions[J]．Guangdong Electric Power，2019，32(11)：63-69． doi:10.3969/j.issn.1007-290X.2019.011.008
6	郭君．浅析600 MW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． doi:10.3969/j.issn.1671-0797.2018.27.004
	GUO J ．Analysis of deep peak shaving technical measures and operation precautions for 600 MW supercritical DC thermal power unit[J]．Electrical Engineering and Automation，2018，27(4)：7-8． doi:10.3969/j.issn.1671-0797.2018.27.004
7	牛斌，李丽锋，孙倩，等．超临界循环流化床机组全负荷段深度调峰方法研究[J]．发电技术，2021，42(2)：273-279． doi:10.12096/j.2096-4528.pgt.20024
	NIU B， LI L F， SUN Q，et al ．Research on deep peak shaving method in full load section of supercritical circulating fluidized bed units[J]．Power Generation Technology，2021，42(2)：273-279． doi:10.12096/j.2096-4528.pgt.20024
8	王鹏程，邓博宇，蔡晋，等．超临界循环流化床锅炉深度调峰技术难点及控制策略[J]．中国电力，2021，54(5)：206-212． doi:10.11930/j.issn.1004-9649.202011107
	WANG P C， DENG B Y， CAI J，et al ．Technical difficulties and control strategies for deep peak regulation of supercritical circulating fluidized bed boilers[J]．China Electric Power，2021，54(5)：206-212． doi:10.11930/j.issn.1004-9649.202011107
9	石友，尹莉，杨虎，等．2×350 MW超临界循环流化床机组锅炉说明书[Z]．成都：东方锅炉电气集团，2017：7．
	SHI Y， YIN L， YANG H，et al ．2×350 MW supercritical circulating fluidized bed unit boiler specification[Z].Chengdu：Dongfang Boiler Electric Group，2017：7．
10	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:10.3969/j.issn.1002-3364.2014.02.100
	CHEN W C ．The control of the feed water flow in the start-up stage of the once-through furnace with the boiler water circulating pump[J]．Thermal Power Generation，2014，43(2)：100-103． doi:10.3969/j.issn.1002-3364.2014.02.100
11	郭馨，王婷，黄莺，等．660 MW等级超超临界锅炉低负荷水动力安全性分析[J]．电站系统工程，2021，37(5)：16-18．
	GUO X， WANG T， HUANG Y，et al ．Low-load hydrodynamic safety analysis of 660 MW ultra-supercritical boiler[J]．Power Station System Engineering，2021，37(5)：16-18．
12	中华人民共和国国家发展和改革委员会．循环流化床锅炉性能试验规程： [S]．北京：中国电力出版社，2005．
	National Development and Reform Commission ． Performance test code for circulating fluidized bed boiler： [S]．Beijing：China Electric Power Press，2005．
13	中华人民共和国国家质量监督检验检疫总局，中国国家标准化管理委员会．电站锅炉性能试验规程： [S]．北京：中国标准出版社，2015．
	General Administration of Quality Supervision， Inspection and Quarantine of the People’s Republic of China，China National Standardization Management Committee ． Performance test code for utility boiler： [S]．Beijing：China Standard Press，2015．
14	于浩洋，高明明，张缦，等．循环流化床机组深度调峰性能分析与评价[J]．热力发电，2020，49(5)：65-72． doi:10.19666/j.rlfd.202002035
	YU H Y， GAO M M， ZHANG M，et al ．Analysis and evaluation of deep peak shaving performance of circulating fluidized bed units[J]．Thermal Power Generation，2020，49(5)：65-72． doi:10.19666/j.rlfd.202002035
15	何志瞧，陈巍文，张江丰．660 MW超临界机组深度调峰试验及低负荷段经济性分析[J]．浙江电力，2020，39(6)：68-73． doi:10.19585/j.zjdl.202006012
	HE Z Q， CHEN W W， ZHANG J F ．In-depth peak shaving test of 660 MW supercritical unit and economic analysis of low load section[J]．Zhejiang Electric Power，2020，39(6)：68-73． doi:10.19585/j.zjdl.202006012
16	程伟，周旭，郭强，等．350 MW超临界循环流化床锅炉运行特性研究[J]．东方电气评论，2016(4)：38-42．
	CHENG W， ZHOU X， GUO Q，et al ．Research on the operating characteristics of a 350 MW supercritical circulating fluidized bed boiler[J]．Dongfang Electric Review，2016(4)：38-42．
17	杨俏发．循环流化床机组深度调峰试验研究[J]．山西电力，2018(6)：51-53． doi:10.3969/j.issn.1671-0320.2018.06.014
	YANG Q F ．Experimental study on deep peak shaving of circulating fluidized bed units[J]．Shanxi Electric Power，2018(6)：51-53． doi:10.3969/j.issn.1671-0320.2018.06.014
18	李竞岌，杨海瑞，吕俊复，等．节能型循环流化床锅炉低氮氧化物排放的分析[J]．燃烧科学与技术， 2013，19(4)：293-298． doi:10.11715/rskxjs201304002
	LI J J， YANG H R， LV J F，et al ．Analysis of low nitrogen oxide emissions from energy-saving circulating fluidized bed boilers[J]．Combustion Science and Technology，2013，19(4)：293-298． doi:10.11715/rskxjs201304002
19	国家能源局．燃煤电厂烟气脱硝装置性能验收试验规范： [S]．北京：国家能源局，2012．
	National Energy Administration ． Specification for performance acceptance test of flue gas denitrification device in coal-fired power plants： [S]．Beijing：National Energy Administration，2012．
20	巩李明，邓启刚，刘杰，等．东方350 MW超临界CFB锅炉灵活性改造技术研究[J]．节能，2021，8(2)：39-41． doi:10.3969/j.issn.1004-7948.2021.08.010
	GONG L M， DENG Q G， LIU J，et al ．Research on flexibility transformation technology of Dongfang 350 MW supercritical CFB boiler[J]．Energy Conservation，2021，8(2)：39-41． doi:10.3969/j.issn.1004-7948.2021.08.010
21	冯荣荣，田亮．柔性Smith预估控制在循环流化床机组协调控制系统中的应用设计[J]．广东电力，2021，34(2)：108-114． doi:10.3969/j.issn.1007-290X.2021.002.014
	FENG R R， TIAN L ．Application design of flexible Smith prediction control in the coordinated control system of circulating fluidized bed units[J]．Guangdong Electric Power，2021，34(2)：108-114． doi:10.3969/j.issn.1007-290X.2021.002.014
22	刘吉臻，洪烽，高明明，等．循环流化床机组快速变负荷运行控制策略研究[J]．中国电机工程学报，2017，37(14)：4130-4137． doi:10.13334/j.0258-8013.pcsee.161055
	LIU J Z， HONG F， GAO M M，et al ．Research on control strategy for rapidly variable load operation of circulating fluidized bed units[J]．Chinese Journal of Electrical Engineering，2017，37(14)：4130-4137． doi:10.13334/j.0258-8013.pcsee.161055

序号	参数	40%负荷工况	30%负荷工况
1	有功功率/MW	142.1	101.4
2	主汽压力/MPa	11.427	10.872
3	主汽温度/℃	567.3	556.2
4	再热压力/MPa	1.891	1.362
5	再热温度/℃	559.9	540.3
6	低排压力/kPa	4.541	3.835
7	排烟氧量/%	4.7	5.0
8	排烟温度/℃	115.0	112.6
9	给水压力/MPa	12.37	12.36

序号	参数	40%负荷工况	30%负荷工况
1	有功功率/MW	142.1	101.4
2	主汽压力/MPa	11.427	10.872
3	主汽温度/℃	567.3	556.2
4	再热压力/MPa	1.891	1.362
5	再热温度/℃	559.9	540.3
6	低排压力/kPa	4.541	3.835
7	排烟氧量/%	4.7	5.0
8	排烟温度/℃	115.0	112.6
9	给水压力/MPa	12.37	12.36

参数	4.5%	5.0%	5.5%
一次风总量/(m³/h)	282 000	271 000	274 000
二次风总量/(m³/h)	92 000	116 000	150 000
平均床温/℃	850	853	833
A排烟温度/℃	118.0	113.9	119.4
B排烟温度/℃	120.6	111.3	117.0
A飞灰含碳质量分数/%	1.31	1.06	1.14
B飞灰含碳质量分数/%	0.70	0.54	0.70
炉渣含碳质量分数/%	0.86	0.58	0.47

参数	4.5%	5.0%	5.5%
一次风总量/(m³/h)	282 000	271 000	274 000
二次风总量/(m³/h)	92 000	116 000	150 000
平均床温/℃	850	853	833
A排烟温度/℃	118.0	113.9	119.4
B排烟温度/℃	120.6	111.3	117.0
A飞灰含碳质量分数/%	1.31	1.06	1.14
B飞灰含碳质量分数/%	0.70	0.54	0.70
炉渣含碳质量分数/%	0.86	0.58	0.47

参数	床压工况
参数	8.5 kPa	7.0 kPa
A一次风机电流/A	77.6	75.4
B一次风机电流/A	78.9	77.1
平均床温/℃	835	852
最高床温/℃	908	918
最低床温/℃	766	792
A排烟温度/℃	123.7	125.2
B排烟温度/℃	127.5	131.2
飞灰含碳质量分数/%	0.60	1.32
炉渣含碳质量分数/%	0.39	0.32