Ash fusion regulation mechanism of coal with low melting point and different ash compositions

HUANG Zhen-yu; LI Yan; ZHAO Jing; ZHOU Zhi-jun; ZHOU Jun-hu; CEN Ke-fa

Volume 40 Issue 09

Sep. 2012

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Article Navigation > Journal of Fuel Chemistry and Technology > 2012 > 40(09): 1038-1043

HUANG Zhen-yu, LI Yan, ZHAO Jing, ZHOU Zhi-jun, ZHOU Jun-hu, CEN Ke-fa. Ash fusion regulation mechanism of coal with low melting point and different ash compositions[J]. Journal of Fuel Chemistry and Technology, 2012, 40(09): 1038-1043.

Citation:

HUANG Zhen-yu, LI Yan, ZHAO Jing, ZHOU Zhi-jun, ZHOU Jun-hu, CEN Ke-fa. Ash fusion regulation mechanism of coal with low melting point and different ash compositions[J]. Journal of Fuel Chemistry and Technology, 2012, 40(09): 1038-1043.

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Ash fusion regulation mechanism of coal with low melting point and different ash compositions

1.
State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China;
2.
Nuclear Power Institute of China, Chengdu 410041, China

Received Date: 2012-01-11
Rev Recd Date: 2012-04-11
Publish Date: 2012-09-29

Abstract

Abstract

Two coals (Ninglu and Xiaotun) with low and close ash fusion temperature were selected and blended with Tianchi coal having a high fusion temperature. The results show that the ash fusion temperature of the blended coal with Xiaotun increases more significantly with increasing ratio of Tianchi coal; and that with Ninglu coal varies little. Mineral transformation processes of blended coal-ashes were examined by XRD. The combustion residue of Ninglu coal contains lots of minerals such as hematite and anhydrite which have negative effects on the formation of mullite. The ash fusion temperature could not increase dramatically for the lack of mullite with high fusion temperature and playing a key supporting role in coal-ash melting. Some experiments of blended coals were carried out in a drop tube furnace to simulate slagging process in power plant boilers. SEM was applied to analyze the surface morphology of different residues. It is proved that Xiaotun coal blended with Tianchi coal could remarkably improve slagging characters.
- coal blending,
- ash composition,
- ash fusion regulation,
- mullite,
- drop tube furnace

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References(14)

References

李帆, 邱建荣, 郑瑛, 郑楚光. 混煤煤灰在加热过程中矿物质行为研究[J]. 燃料化学学报, 1997, 25(5): 400-403. (LI Fan, QIU Jian-rong, ZHENG Ying, ZHENG Chu-guang. Study on behavior of minerals in blended coal ash during heating process[J]. Journal of Fuel Chemistry and Technology, 1997, 25(5): 400-403.)

李帆, 邱建荣, 郑楚光, 胡宇. 混煤煤灰熔融特性及矿物质形态的研究[J]. 工程热物理学报, l998, 19(1): 112-116. (LI Fan,QIU Jian-rong, ZHENG Chu-guang, HU Yu. The fusion characteristics and mineral species of blended coal ash[J]. Journal of Engineering Thermophysics, l998, 19(1): l12-l16.)

杨建国, 刘志, 赵虹, 岑可法. 配煤煤灰内矿物质转变过程与熔融特性规律[J]. 中国电机工程学报, 2008, 28(14): 61-66. (YANG Jian-guo, LIU Zhi, ZHAO Hong, CEN Ke-fa.Minerals transition process and melting characteristics of blended coal-ashes[J].Proceedings of the CSEE, 2008, 28(14): 61-66.)

禹立坚, 黄镇宇, 程军, 潘华引, 周俊虎, 岑可法. 配煤燃烧过程中煤灰熔融性研究[J]. 燃料化学学报, 2009, 37(2): 139-144. (YU Li-jian, HUANG Zhen-yu, CHENG Jun, PAN Hua-yin, ZHOU Jun-hu, CEN Ke-fa. Study on the coal ash fusibility during blending coal combustion[J].Journal of Fuel Chemistry and Technology, 2009, 37(2): 139-144.)

HUFFMAN G P, HUGGINS F E, DUNMYRE G R. Investigation of the high-temperature behavior of coal ash in reducing and oxidizing Atmospheres[J].Fuel, 1981, 60(7): 585-597.

VUTHALURUA H B.Ash chemistry and mineralogy of an Indonesian coal during combustion[J].Fuel Process Technol, 2008, 89(6): 595-607.

修洪雨. 燃煤灰渣主要成分的熔融特性研究. 杭州:浙江大学, 2005. (XIU Hong-yu. Study on the melting characteristic of main component in the slagging of coal combustion. Hangzhou: Zhejiang University, 2005.)

高福烨, 李帆. 煤的高温灰在加热过程中的行为研究[J]. 燃料化学学报, 1989, 17(2): 175-182. (GAO Fu-ye, LI Fan. Study on the behavior of coal ash at high temperature[J].Journal of Fuel Chemistry and Technology, 1989, 17(2): 175-182.)

陈江峰, 邵龙义, 魏思民. 高铝粉煤灰合成莫来石的SEM和XRD研究[J]. 矿物岩石地球化学通报, 2007, 26(2): 144-148. (CHEN Jiang-feng, SHAO Long-yi, WEI Si-min. Research on mullite synthesized from high-alumina fly ash by SEM and XRD[J]. Bulletin of Mineralogy,Petrology and Geochemistry, 2007, 26(2):144-148.)

杜晶, 薛群虎, 周永生, 王秀芬. 高纯煤系高岭土合成莫来石研究[J]. 非金属矿, 2006, 29(1): 32-34. (DU Jing, XUE Qun-hu, ZHOU Yong-sheng, WANG Xiu-fen. Study on synthesis of mullite by high-purity Kaolin in coal[J]. Non-metallic Mines. 2006, 29(1): 32-34.)

程军, 周俊虎, 刘建忠, 范红宇, 曹欣玉, 李震宇, 岑可法. 添加剂催化洁净煤燃烧的动态特性研究[J]. 中国电机工程学, 2002, 22(9): 128-131. (CHENG Jun, ZHOU Jun-hu, LIU Jian-zhong, FAN Hong-yu, CAO Xin-yu, LI Zhen-yu, CEN Ke-fa. Dynamic characteristics of catalytic clean coal combustion with additives[J].Proceedings of the CSEE, 2002, 22(9): 128-131.)

李帆, 邱建荣, 郑瑛, 郑楚光. 煤燃烧过程矿物质行为研究[J]. 工程热物理学报, 1999, 20(2): 258-260. (LI Fan, QIU Jian-rong, ZHENG Ying, ZHENG Chu-guang.Study on behavior of mineral matters in coal during burning process[J].Journal of Engineering Thermophysics, 1999, 20(2): 258-260.)

程军, 周俊虎, 刘建忠, 周志军, 曹欣玉, 岑可法. 大型电站煤粉炉自身固硫灰渣的微观晶相分析[J]. 燃料化学学报, 2005, 33(1): 38-42. (CHENG Jun, ZHOU Jun-hu, LIU Jian-zhong, ZHOU Zhi-jun, CAO Xin-yu, CEN Ke-fa.Crystal compositions of self-desulfurization residues from a pulverized coal fired boiler[J].Journal of Fuel Chemistry and Technology, 2005, 33(1): 38-42.)

周俊虎, 赵晓辉, 杨卫娟, 曹欣玉, 刘建忠, 岑可法. 神华煤结渣倾向和结渣机制研究[J]. 中国电机工程学报, 2007, 27(8): 31-36. (ZHOU Jun-hu, ZHAO Xiao-hui, YANG Wei-juan, CAO Xin-yu, LIU Jian-zhong, CEN Ke-fa. Slagging propensity and mechanism of Shenhua coal[J]. Proceedings of the CSEE, 2007, 27(8): 31-36.)

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