高碱煤燃烧过程中屏式过热器分层结渣机理研究

doi:10.11930/j.issn.1004-9649.2016.08.167.05

中国电力 ›› 2016, Vol. 49 ›› Issue (8): 167-171.DOI: 10.11930/j.issn.1004-9649.2016.08.167.05

高碱煤燃烧过程中屏式过热器分层结渣机理研究

谭厚章，魏博，王学斌，王毅斌，阮仁晖，胡中发

西安交通大学热流科学与工程教育部重点实验室，陕西西安 710049

收稿日期:2016-03-16 出版日期:2016-08-10 发布日期:2016-08-12
通讯作者: 国家自然科学基金资助项目（51376147，91544108，51306142）
作者简介:谭厚章（1965—），男，江西吉安人，教授，博士生导师，从事固体颗粒燃烧的着火、结渣、污染物控制等方面的研究工作。

Study on Layered Slagging Mechanism at Platen Superheater during High Alkali Coal Combustion

TAN Houzhang, WEI Bo, WANG Xuebin, WANG Yibin, RUAN Renhui, HU Zhongfa

MOE Key Laboratory of Thermo-Fluid Science and Engineering, Xi’an Jiaotong University, Xi’an 710049, China

Received:2016-03-16 Online:2016-08-10 Published:2016-08-12
Contact: This work is supported by National Natural Science Fund of China (No. 51376147, No. 91544108, No. 51306142).

摘要/Abstract

摘要： 中国的准东煤储量巨大，但由于其Na、Ca含量较高，燃烧准东煤的锅炉炉膛出口过热器表面上结渣和沾污问题严重。为了阐明其结渣机理，对某350 MW锅炉出口屏式过热器（烟气温度1 000 ℃左右）的焦样进行分析，发现焦体内部存在明显的分层结构，不同层焦样中元素含量明显不同，化合物形态也存在较大差异。这是由于在焦体发展过程中，随着沉积表面温度逐渐升高，焦体的灰颗粒之间发生差异较大的物理化学反应而形成的。通过对不同层焦样的化合物形态进行整理并详细分析，最终提出了各层不同化合物的形成机理。

关键词: 高碱煤, 屏式过热器, 分层结构, 结渣机理

Abstract: The reserves of Zhundong(ZD) coal in China are huge. However, due to its high contents of Na and Ca, slagging and fouling are serious on the surface of the platen superheater at the furnace outlet area(at the flue gas temperature of around 1 000 °C). In this paper, to explore the mechanism of the slagging in the high alkali coal combustion process, study is conducted on the slag samples from the platen superheater of a 350-MW boiler. With the study, an obvious layered structure is observed in the slag, and the element compositions and compounds in each layer are very different. This is because in the developing of slags, with the deposite temperature rising, different physical-chemical reactions happen in the ash particles. Through the classification and the detailed analysis on the compounds in each layer, the formation mechanisms of those different compounds are proposed.

Key words: high alkali coal, platen superheater, layered structure, slagging mechanism

中图分类号:

谭厚章，魏博，王学斌，王毅斌，阮仁晖，胡中发. 高碱煤燃烧过程中屏式过热器分层结渣机理研究[J]. 中国电力, 2016, 49(8): 167-171.

TAN Houzhang, WEI Bo, WANG Xuebin, WANG Yibin, RUAN Renhui, HU Zhongfa. Study on Layered Slagging Mechanism at Platen Superheater during High Alkali Coal Combustion[J]. Electric Power, 2016, 49(8): 167-171.

导出引用管理器 EndNote|Ris|BibTeX

链接本文: https://www.electricpower.com.cn/CN/10.11930/j.issn.1004-9649.2016.08.167.05

https://www.electricpower.com.cn/CN/Y2016/V49/I8/167

参考文献

[1] BLOCH H, RAFIQ S, SALIM R. Economic growth with coal, oil and renewable energy consumption in China: Prospects for fuel substitution [J]. Economic Modelling, 2015, 44: 104-115.
[2] ZHOU J, ZHUANG X, ALASTUEY A, et al. Geochemistry and mineralogy of coal in the recently explored Zhundong large coal field in the Junggar basin, Xinjiang province, China [J]. International Journal of Coal Geology, 2010, 82（1-2）: 51-67.
[3] 张守玉，陈川，施大钟，等. 高钠煤燃烧利用现状[J]. 中国电机工程学报，2013，33（5）：1－12．
ZHANG Shouyu, CHEN Chuan, SHI Dazhong, et al. Situation of Combustion Utilization of High sodium coal [J]. Proceedings of the CSEE, 2013, 33(5): 1-12.
[4] 魏博，王学斌，张利孟，等. 掺烧废弃硅粉对准东煤钠迁徙及灰熔融影响的实验研究[J]. 中国电力，2014，47（10）：98－102．
WEI Bo, WANG Xuebin, ZHANG Limeng, et al. Experimental research on the impacts of zhundong coal blending waste silicon powder on sodium transformation and ash fusion[J]. Electric Power, 2014, 47(10): 98-102.
[5] 范建勇，周永刚，李培，等. 准东煤灰熔融温度表征结渣特性的试验研究[J]. 煤炭学报，2013，38（Ｓ2）：478－482．
FAN Jianyong, ZHOU Yonggang, LI Pei, et al. Research on Zhundong coal’s ash melting temperature characterizing its slagging characteristics [J]. Journal of China Coal Society, 2013, 38(S2): 478-482.
[6] 刘敬，王智化，项飞鹏，等. 准东煤中碱金属的赋存形式及其在燃烧过程中的迁移规律实验研究[J]. 燃料化学学报，2014，42（3）：316-322.
LIU Jing, WANG Zhihua, XIANG Feipeng, et al. Modes of occurrence and transformation of alkali metals in Zhundong coal during combustion [J]. Journal of Fuel Chemistry and Technology, 2014, 42(2): 316-322.
[7] LI G, LI S, HUANG Q, et al. Fine particulate formation and ash deposition during pulverized coal combustion of high-sodium lignite in a down-fired furnace [J]. Fuel, 2015, 143: 430-437.
[8] WANG X, XU Z, WEI B, et al. The ash deposition mechanism in boilers burning Zhundong coal with high contents of sodium and calcium: A study from ash evaporating to condensing [J]. Applied Thermal Engineering, 2015, 80: 150-159.
[9] DAI B, WU X, DE GIROLAMO A, et al. Inhibition of lignite ashslagging and fouling upon the use of a silica-based additive in an industrial pulverised coal-fired boiler: Part 2. Speciation of iron in ash deposits and separation of magnetite and ferrite [J]. Fuel, 2015, 139: 733-745.
[10] WEBER R, MANCINI M, SCHAFFEL-MANCINI N, et al. On predicting the ashbehaviour using Computational Fluid Dynamics [J]. Fuel Processing Technology, 2013, 105: 113-128.
[11] LI G, WANG C, YAN Y, et al. Release and transformation of sodium during combustion of Zhundong coals[J]. Journal of the Energy Institute, 2016, 89(1): 48-56.
[12] WANG C, JIN X, WANG Y, et al. Release and Transformation of Sodium during Pyrolysis of Zhundong Coals[J]. Energy & Fuels, 2015, 29(1): 78-85.
[13] FERNANDEZ-TURIEL J L, GEORGAKOPOULOS A, GIMENO D, et al. Ash deposition in a pulverized coal-fired power plant after high-calcium lignite combustion[J]. Energy & Fuels, 2004, 18(5): 1512-1518.
[14] VAN EYK P J, ASHMAN P J, ALWAHABI Z T, et al. The release of water-bound and organic sodium from Loy Yang coal during the combustion of single particles in a flat flame [J]. Combustion and Flame, 2011, 158(6): 1181-1192.
[15] LI H, XIONG J, TANG Y, et al. Mineralogy study of the effect of iron-bearing minerals on coal ash slagging during a high- temperature reducing atmosphere[J]. Energy & Fuels, 2015, 29(11): 6948-6955.
[16] MATSUOKA K, ROSYADI E, TOMITA A. Mode of occurrence of calcium in various coals [J]. Fuel, 2002, 81(11): 1433-1438.
[17] 俞海淼，曹欣玉，周俊虎，等. 高碱灰渣烧结熔融过程中的物相变化[J]. 煤炭学报，2007，32（12）：1316－1319．
YU Haimiao, CAO Xinyu, ZHOU Junhu, et al. Phase transformation of high alkaline ash residue on the process of sintering and fusion [J]. Journal of China Coal Society, 2007, 32(12): 1316-1319.
[18] XUAN W, WHITTY K J, GUAN Q, et al. Influence of Fe2O3 and atmosphere on crystallization characteristics of synthetic coal slags [J]. Energy & Fuels, 2015, 29(1): 405-412.
[19] ZHANG Z, WU X, ZHOU T, et al. The effect of iron-bearing mineral melting behavior on ash deposition during coal combustion [J]. Proceedings of the Combustion Institute, 2011, 33(2): 2853-2861.

高碱煤燃烧过程中屏式过热器分层结渣机理研究

Study on Layered Slagging Mechanism at Platen Superheater during High Alkali Coal Combustion

PDF (PC)

可视化

被引次数

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 1

编辑推荐

Metrics

模态框（Modal）标题

高碱煤燃烧过程中屏式过热器分层结渣机理研究

Study on Layered Slagging Mechanism at Platen Superheater during High Alkali Coal Combustion

PDF (PC)

可视化

被引次数

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 1

编辑推荐

Metrics