1000 MW机组锅炉内结渣物的理化分析Physical and Chemical Analysis on Slag of 1000 MW Unit Boilers
赵刚,吕洪坤,张明,熊建国,应明良,王磊
ZHAO Gang,LYU Hongkun,ZHANG Ming,XIONG Jianguo,YING Mingliang,WANG Lei
摘要(Abstract)：
为了控制炉膛内部的结渣,在对某燃年轻煤种的1 000 MW机组锅炉内部典型渣样进行照相表观分析的基础上,对渣样几处典型区域的切割碾磨物质进行了可燃物、XRF及XRD的分析,结果表明:切割碾磨物中的可燃物含量极低,锅炉内形成的块状物质主要为渣而非焦;第二级过热器区域渣样主要可以分为4个层区,中部为最厚也最致密的烧结层,是导致渣层不断增长的重要层区;应通过适当的吹灰措施确保换热器管道外表面底层附近不形成疏松状渣样。
On the basis of camera investigation on representative slag of a young coal used in 1 000 MW unit boilers, un-burned carbon, XRF and XRD analysis of milled matters from some representative locations in the slag are carried out for the purpose of controlling slag in the furnace. The investigation result shows that the un-burned carbon of milled matters from some representative locations in the slag is very low, which means the nubby matter formed inner this boiler is not coke but slag; slag formed in area of the second stage superheater may be divided into four parts mostly, the middle part of which is the thickest and the most sintered and is a key area resulting in continuing growth of slag layer; appropriate soot blowing measures should be adopted to ensure that loose slag can not be formed near the bottom slag outside the tube of exchanger.
关键词(KeyWords)：
1 000 MW;锅炉;结渣;理化分析
1 000 MW;boiler;slag;physical and chemical analysis
基金项目(Foundation):
作者(Author):
赵刚,吕洪坤,张明,熊建国,应明良,王磊
ZHAO Gang,LYU Hongkun,ZHANG Ming,XIONG Jianguo,YING Mingliang,WANG Lei
DOI: 10.19585/j.zjdl.2014.09.011
参考文献(References)：
- [1]兰泽全,曹欣玉,周俊虎,等.锅炉受热面沾污结渣的危害及其防治措施[J].电站系统工程,2003,19(1):31-33.
- [2]池作和,周昊,蒋啸,等.锅炉结渣机理及防结渣技术措施研究[J].热力发电,1999,28(4):26-30.
- [3]撒应禄,张军.锅炉结渣机理及其防止措施研究[J].锅炉技术,1989(4):1-8.
- [4]蒋月美,苏艺,冯莉莉.锅炉结渣机理分析[J].锅炉技术2001,32(6):9-11.
- [5]陈立军,文孝强,王恭,等.燃煤锅炉结渣特性预测方法综述[J].热力发电2006,35(6):1-5.
- [6]肖隽,吕震中,王军,等.基于改进BP算法的煤灰结渣特性诊断模型[J].热能动力工程,2002,17(3):271-274.
- [7]WEE HL,WU H,ZHANG D.Heterogeneity of Ash Deposits Formed in a Utility Boiler during PF Combustion[J].Energy Fuels,2007,21(2):441-450.
- [8]KOSTAKIS G.Mineralogical composition of boiler fouling and slagging deposits and their relation to fly ashes:The case of Kardia power plant[J].Journal of Hazardous Materials,2011,185(2-3):1012-1018.
- [9]赵晓辉.基于矿物质赋存形态与转变过程的炉内灰渣沉积研究[D].杭州:浙江大学,2007.
- [10]董明钢.高钠煤对锅炉受热面结渣、沾污和腐蚀的影响及预防措施[J].热力发电,2008,37(9):35-39.