孙晖,方国权,郭向健,张喜来
SUN Hui,FANG Guoquan,GUO Xiangjian,ZHANG Xilai

• 1:浙能阿克苏热电有限公司
• 2:西安热工研究院有限公司

摘要(Abstract)：

某超临界燃煤锅炉掺烧准东系列煤，出现渣块掉落引起捞渣机过载跳闸。从煤质分析、落渣位置、炉膛吹灰试验、空气动力场、燃烧器喷口5个方面进行诊断分析，推断结渣和落渣原因，并停炉检查验证结论。结果表明，掺烧准东系列煤后，入炉煤具有中等结渣倾向，在燃烧器周界风口变形堵塞的诱导下，燃烧后的煤灰在侧边水冷壁结渣，渣块积聚后掉落引起捞渣机跳闸。结合掺烧准东系列煤的煤质特性，从运行和检修的角度提出防控措施，为相似情况的锅炉运行提供参考。
Given the overload trip of a slag conveyor caused by slag falling in a critical coal-fired boiler using blended Zhundong coal, the diagnosis and analysis were carried out from five aspects of coal quality analysis, slag falling location, furnace soot blowing test, aerodynamics field and burner nozzle. The causes of slagging and its falling were deduced. Moreover, the furnace was shut down and inspected to verify the inference. The results indicate that the blended Zhundong leads to a moderate slagging tendency. Under the influence of deformation and blockage of the peripheral air nozzles of the burner, ash from combustion deposits as slag on the side water-cooled wall, accumulating into slags that, upon falling, trigger the overload trip of the conveyor. In view of the coal quality characteristics of the blended Zhundong coal, the paper proposes preventive measures from both operational and maintenance perspectives, providing insights for the operation of boilers facing similar situations.

关键词(KeyWords)： 准东煤掺烧;结渣倾向;捞渣机过载;燃烧器烧损;吹灰调整
blended Zhundong coal;slagging tendency;conveyor overload;burner burnout;soot blowing adjustment

Abstract:

Keywords:

基金项目(Foundation): 国家重点研发计划（2020YFC1910000）

作者(Author): 孙晖,方国权,郭向健,张喜来
SUN Hui,FANG Guoquan,GUO Xiangjian,ZHANG Xilai

DOI: 10.19585/j.zjdl.202403015

参考文献(References)：

• [1]杨志忠.高钙劣质煤矿物的炉内特性机理研究[J].电站系统工程，1995,11(5):56-60.YANG Zhizhong.Investigation on fireside behavior of minerals in high-calcium low-rank coals[J].Power System Engineering,1995,11(5):56-60.
• [2]王智化，李谦，刘敬，等.准东煤中碱金属的赋存形态及其在热解过程中的迁移规律[J].中国电机工程学报，2014,34（增刊1):130-135.WANG Zhihua,LI Qian,LIU Jing,et al.Occurrence of alkali metals in Zhundong coal and its migration during pyrolysis process[J].Proceedings of the CSEE,2014,34(S1):130-135.
• [3]陶玉洁，张彦威，周俊虎，等.准东煤在燃烧过程中的矿物演变过程及Na、Ca释放规律[J].中国电机工程学报，2015,35(5):1169-1175.TAO Yujie,ZHANG Yanwei,ZHOU Junhu,et al.Mineral conversion regularity and release behavior of Na,Ca during Zhundong coal’s combustion[J].Proceedings of the CSEE,2015,35(5):1169-1175.
• [4]杨燕梅，张海，吴玉新，等.不同灰化温度下准东煤碱/碱土金属的析出特性[J].燃烧科学与技术，2015,21(4):297-300.YANG Yanmei,ZHANG Hai,WU Yuxin,et al.Release of alkali/alkaline earth metal species in Zhundong coal at different ashing temperatures[J].Journal of Combustion Science and Technology,2015,21(4):297-300.
• [5]刘炎泉.循环流化床燃用新疆准东煤结渣沾污机理及防止研究[D].杭州：浙江大学，2019.LIU Yanquan.Research on prevention and mechanism of slagging and fouling during Zhundong coal combustion in A circulating fluidized bed[D].Hangzhou:Zhejiang University,2019.
• [6]唐诗，傅培舫，刘洋，等.准东煤及配煤的矿物相变及熔融机理[J].燃烧科学与技术，2019,25(4):324-330.TANG Shi,FU Peifang,LIU Yang,et al.Mineral phase transformation and ash melting mechanism of Zhundong coal and blended coal[J].Journal of Combustion Science and Technology,2019,25(4):324-330.
• [7]魏博，谭厚章，王学斌，等.准东煤燃烧过程中Na/Ca/Fe对结渣行为影响的机理研究[J].动力工程学报，2017,37(9):685-690.WEI Bo,TAN Houzhang,WANG Xuebin,et al.Effect of Na/Ca/Fe on slagging behavior of Zhundong coal during combustion process[J].Journal of Chinese Society of Power Engineering,2017,37(9):685-690.
• [8]史航，吴玉新，郭前鑫，等.准东煤碱金属在350 MW煤粉炉内的沿程分布特性[J].中国电机工程学报，2018,38(23):6981-6986.SHI Hang,WU Yuxin,GUO Qianxin,et al.Distribution characteristics of the alkali in Zhundong coal along the flue gas of a 350 MW pulverized coal furnace[J].Proceedings of the CSEE,2018,38(23):6981-6986.
• [9]杨国旗.大型电站锅炉燃用神府煤结焦分析及其防止措施[J].陕西电力，2007,35(9):30-34.YANG Guoqi.Analysis on coking in large-scale power plant boiler fueled with Shenfu coal[J].Shaanxi Electric Power,2007,35(9):30-34.
• [10]王洪健，王海洋，孔皓，等.135 MW循环流化床锅炉纯燃准东煤改造策略与运行技术研究[J].发电技术，2022,43(6):918-926.WANG Hongjian,WANG Haiyang,KONG Hao,et al.Retrofitting strategy and operating technology of pure burning Zhundong coal in a 135 MW circulating fluidized bed boiler[J].Power Generation Technology,2022,43(6):918-926.
• [11]赵刚，吕洪坤，张明，等.1 000 MW机组锅炉内结渣物的理化分析[J].浙江电力，2014,33(9):36-40.ZHAO Gang,LYU Hongkun,ZHANG Ming,et al.Physical and chemical analysis on slag of 1 000 MW unit boilers[J].Zhejiang Electric Power,2014,33(9):36-40.
• [12]刘胜利，张海军，程建，等.1 000 MW超超临界双切圆燃烧锅炉结焦与高温腐蚀防控研究[J].发电技术，2023,44(2):171-182.LIU Shengli,ZHANG Haijun,CHENG Jian,et al.Research on slagging and high temperature corrosion prevention and control of a 1 000 MW ultra supercritical double tangentially fired boiler[J].Power Generation Technology,2023,44(2):171-182.
• [13]黄镇宇，李燕，赵京，等.不同灰成分的低熔点煤灰熔融性调控机理研究[J].燃料化学学报，2012,40(9):1038-1043.HUANG Zhenyu,LI Yan,ZHAO Jing,et al.Ash fusion regulation mechanism of coal with low melting point and different ash compositions[J].Journal of Fuel Chemistry and Technology,2012,40(9):1038-1043.
• [14]李金芳，吕洪坤，谢娜，等.飞灰中硫酸钠铝硅酸化过程SO3生成机理[J].浙江电力，2021,40(6):92-98.LI Jinfang,LYU Hongkun,XIE Na,et al.Generation mechanism of SO3 during aluminosilicate reaction of sodium sulfate in fly ash[J].Zhejiang Electric Power,2021,40(6):92-98.
• [15]王林，王红雨，韩瑞，等.超临界热电联产锅炉结焦机理分析与工程调整措施[J].燃烧科学与技术，2019,25(1):37-44.WANG Lin,WANG Hongyu,HAN Rui,et al.Mechanism analysis and engineering adjustment of coking problem in cogeneration super critical boiler[J].Journal of Combustion Science and Technology,2019,25(1):37-44.
• [16]章良利，李敏，赵敏，等.对冲燃烧锅炉低氮燃烧器改造后煤种适应性试验研究[J].浙江电力，2016,35(11):37-41.ZHANG Liangli,LI Min,ZHAO Min,et al.Experimental research on coal applicability after low-NOX burner retrofit of opposed firing boiler[J].Zhejiang Electric Power,2016,35(11):37-41.
• [17]高岩峰.锅炉结焦的原因、危害和解决办法[J].赤峰学院学报（自然科学版），2009,25(11):161-162.GAO Yanfeng.Causes,harms and solutions of boiler coking[J].Journal of Chifeng University (Natural Science Edition),2009,25(11):161-162.
• [18]王志强.煤种性质对煤粉工业锅炉结焦的影响[J].洁净煤技术，2020,26(2):137-144.WANG Zhiqiang.Influence of coal properties on coking of pulverized coal industrial boilers[J].Clean Coal Technology,2020,26(2):137-144.