四角切圆锅炉温度场闭环控制研究

doi:10.11930/j.issn.1004-9649.2017.02.088.07

摘要/Abstract

摘要： 电站锅炉炉膛温度场与煤粉燃烧、工质吸热、NO_x生成及积灰结渣的形成等密切相关,易受到某些未知因素的影响而遭到破坏,进而影响锅炉的安全、稳定运行。对某电厂2号锅炉在300 MW、270 MW、240 MW 3个工况下进行了燃烧调整试验,利用声波测温系统实时采集温度,并将数据处理结果以偏置信号的形式加在原有的信号上,通过控制二次风门开度的大小对温度场均衡性和NO_x排放浓度进行闭环控制优化。试验结果显示,锅炉温度场均衡性变好,NO_x排放浓度降低。该研究解决了温度场只能依据操作人员经验进行调整的不灵活性问题,提高了锅炉控制的智能化程度,对优化燃烧有着重要参考价值。

关键词: 声波测温, DCS, 闭环控制, 温度场, 二次风, NOx排放

Abstract: The boiler furnace temperature field is determined by coal combustion, working medium heat absorption, NO_x generation, as well as fouling and slagging, etc. It tends to be damaged by some uncertain factors, which will eventually affect the safe and stable operation of boilers. Therefore, the combustion adjustment experiment is performed at the load level of 300 MW, 270 MW and 240 MW respectively on Unit 2 of a power plant, and the real-time temperature data are collected by the acoustic temperature measurement system. Then, the processed data results are superimposed onto the original signals in the form of bias signals. By controlling the secondary air door opening size, the balance of temperature field and NO_x emission concentration are optimized in closed-loop control. The experiment results show that the temperature field balance has been improved and the NO_x emission concentration is also reduced effectively. Through this study the issue of lacking flexibility in manual adjustment based on operators’ experience is resolved. The intelligent level of the boiler control is also improved, which is very helpful for combustion optimization.

Key words: acoustic temperature measurement, DCS, closed-loop control, temperature field, secondary air, NOx emissions

中图分类号:

TM62

马平, 刘南南, 王真, 赵倩. 四角切圆锅炉温度场闭环控制研究[J]. 中国电力, 2017, 50(2): 88-94.

MA Ping, LIU Nannan, WANG Zhen, ZHAO Qian. Study on Tangential Boiler Temperature Field Using Closed-Loop Control[J]. Electric Power, 2017, 50(2): 88-94.

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链接本文: https://www.electricpower.com.cn/CN/10.11930/j.issn.1004-9649.2017.02.088.07

https://www.electricpower.com.cn/CN/Y2017/V50/I2/88

参考文献

[1] 张力,赵亮宇. 基于证据理论的炉膛火焰中心高度判别[J]. 电站系统工程,2014,30（3）：21-23.
ZHANG Li, ZHAO Liangyu. Diagnosis of furnace flame core height based on dempster-shafer evidence theory [J]. Power System Engineering, 2014, 30(3): 21-23.
[2] 龚和,刘安堂,方晓东,等. 600 MW超临界机组锅炉燃烧优化调整方法[J]. 华东电力,2010,38（9）：1463-1465.
GONG He, LIU Antang, FANG Xiaodong, et al . Combustion optimization adjustment method for 600 MW supercritical unit [J]. East China Electric Power, 2010, 38(9): 1463-1465.
[3] 曹慎腾,刘定坡,马瑞,等. 四角切圆煤-气浑烧锅炉炉膛出口烟温偏差的控制[J]. 锅炉制造,2015,5（3）：1-4.
CAO Shenteng, LIU Dingpo, MA Rui, et al . The control of the gas temprature deviation in furnace outlet of the tangentially coal-gas dual-fired boiler [J]. Boiler Manufacturing, 2015, 5(3): 1-4.
[4] 周俊虎,宋国良,陈寅彪,等. 2 008 t/h四角切圆燃烧锅炉炉膛出口烟温偏差的试验研究[J]. 热力发电,2003（6）：31-35.
ZHOU Junhu, SONG Guoliang, CHEN Yinbiao, et al . Experimental study on 2 008 t/h tangentially fired boiler furnace outlet flue gas temperature deviation [J]. Thermal Power Generation, 2003(6): 31-35.
[5] 应明良,潘国清,戴成峰,等. 600 MW机组四角切圆锅炉低氮燃烧改造及运行调整[J]. 中国电力,2012,45（4）：54-58.
YING Mingliang, PAN Guoqing, DAI Chengfeng, et al . Low NO x combustion reformation and operation adjustment in 600 MW unit tangential firing boiler [J]. Electric Power, 2012, 45(4): 54-58.
[6] 樊泉桂,阎维平,闫顺林,等. 锅炉原理[M]. 北京：中国电力出版社,2008：101-103.
[7] 倪煜,李德波. 660 MW超超临界旋流对冲燃煤锅炉二次风配风方式对 NO x 分布影响的数值模拟[J]. 电力建设,2014,35（1）：109-113.
NI Yu, LI Debo. Numerical simulation of second air distribution influence on concentration of NO x distribution for swirl opposed wall firing pulverized coal boiler in 660 MW ultra supercritical unit [J]. Electric Power Construction, 2014, 35(1): 109-113.
[8] 宋兆龙,金键. 煤质成分在线检测技术的最新进展[J]. 热能动力工程,2002,17（5）：458-461.
SONG Zhaolong, JIN Jian. Recent advances in the on-line detection technology of coal elemental composition[J]. Journal of Engineering for Thermal Energy and Power, 2002, 17(5): 458-461.
[9] KYCHAKOFF G P, BOYD S P. Enertechnix Ietal. Acoustic measurement [J]. Measuring Devices, 2005(8): 75-80.
[10] 朱晓莉. 电站锅炉炉膛温度场重建算法研究[D]. 杭州：中国计量学院,2012：11-16.
ZHU Xiaoli. Algorithm research of boiler furnace temperature field in power station [D]. Hangzhou: China Jiliang University, 2012: 11-16.
[11] 吴英,林显敏,陈林国. 600 MW四墙切圆燃烧超临界锅炉炉膛出口烟温偏差试验研究[J]. 电站系统工程,2012,11（6）：32-34.
WU Ying, LIN Xianmin, CHEN Linguo. Test and study on furnace exit flue gas temperature deviation of 600 MW supercritical boiler with tangential firing[J]. Power System Engineering, 2012, 11(6): 32-34.
[12] 岑可法,姚强,骆仲泱,等. 燃烧理论与污染控制[M]. 北京：机械工业出版社,2004.
[13] EDGAR T F. Coal processing and pollution control[M]. Houston: Gulf Publishing Company, 1993: 409-478.
[14] MARTIN A E. Emission control technology for industrial boiler[M]. New Jerser: Noyes Data Corporation, 1981: 222-239.
[15] VASQUEZ E, SEARS R. Combustion control techniques achieve 0.15 LB/MMBtu NO x levels without SCR[J]. Power Engineering, 2003, 107(1): 39-42.
[16] 费洪晓,黄勤径,戴弋,等. 基于SVM与遗传算法的燃煤锅炉燃烧多目标优化系统[J]. 计算机应用研究,2008,25（3）：811-813.
FEI Hongxiao, HUANG Qinjing, DAI Yi, et al . Multi objective optimization system of coal-fired boiler combustion based on SVM and genetic algorithm[J]. Application Research of Computers,2008, 25(3): 811-813.
[17] 肖海平,张千,王磊,等. 燃烧调整对NO x 排放及锅炉效率的影响[J]. 中国电机工程学报,2011,31（8）：1-6.
XIAO Haiping, ZHANG Qian, WANG Lei, et al . Effect of combustion adjustment on NO x emission and boiler efficiency [J].Proceedings of the CSEE, 2011, 31(8): 1-6.
[18] 王学栋,辛洪昌,栾涛,等. 330 MW机组锅炉燃烧调整对NO x 排放浓度影响的试验研究[J]. 电站系统工程,2007,23（3）：7-10.
WANG Xuedong, XIN Hongchang, LUAN Tao, et al . Research ant test on influence of boiler combustion adjusting on NO x emission of 330 MW unit[J]. Power System Engineering, 2007, 23(3): 7-10.
[19] 刘海峰. 电站燃烧锅炉燃烧优化系统研究[D]. 保定：华北电力大学,2013：33-37.
LIU Haifeng. Research on coal-fired utility boiler combustion optimization system[D]. Baoding: North China Electric Power University, 2013: 33-37.