准东高钠煤热解过程中钠的迁移特性实验研究

宋维健; 宋国良; 张海霞; 范金龙; 吕清刚

准东高钠煤热解过程中钠的迁移特性实验研究

1.
中国科学院工程热物理研究所, 北京 100190;
2.
中国科学院大学, 北京 100049

基金项目: 国家自然科学基金(21306193); 中国科学院战略性先导科技专项(XDA07030100).

详细信息

通讯作者:
宋国良,男,副研究员,博士,Tel:13699186030;E-mail:songgl@iet.cn.

中图分类号: TQ530.2
计量
- 文章访问数: 556
- HTML全文浏览量: 15
- PDF下载量: 720
- 被引次数: 0
出版历程
- 收稿日期: 2014-08-07
- 修回日期: 2014-10-15
- 刊出日期: 2015-01-30

Experimental study on alkali metal transformation during high-sodium Zhundong coal pyrolysis

1.
Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, China;
2.
University of Chinese Academy of Sciences, Beijing 100049, China

摘要

摘要: 针对新疆准东煤田高钠煤(简称准东高钠煤)在发电锅炉燃烧时遇到结渣黏污严重的问题,基于立式管式炉热解,利用电感耦合等离子体-原子发射光谱(ICP-AES)、X射线衍射(XRD)以及扫描电镜-能谱(SEM-EDX)等检测手段,分析了准东高钠煤在不同热解温度下碱金属钠的析出特性、赋存形态以及热解半焦的微观形貌.利用Fact sage 6.1化学热力学平衡计算软件分析了碱金属的析出形式.结果表明,准东高钠煤中的碱金属钠在热解过程中有部分析出,开始的析出温度为600 ℃,当热解温度达900 ℃时,碱金属钠的析出率为40.2%;碱金属钠在热解过程中主要以NaCl的形式析出;热解温度低于900 ℃时,没有熔融态物质生成.
- 高钠煤 /
- 热解 /
- 钠迁移特性 /
- 热力学平衡计算
Abstract: The alkali metal transformation during high-sodium Zhundong coal pyrolysis was investigated in a vertical tubular furnace reactor. The release characteristics, modes of occurrence of Na, the microstructure of char samples after pyrolysis at different temperatures were examined by using inductive coupled plasma equipped with atomic emission spectrometer(ICP-AES), X-ray diffractometry (XRD) and scanning electron microscopy with an energy dispersive X-ray spectrometer(SEM-EDX), respectively. Meanwhile, the release forms of alkali metal from coal were simulated by Fact sage 6.1. The results show that a part of sodium in high-sodium coal is released during pyrolysis, starting to release at 600 ℃ and reaching to 40.2% of release at 900 ℃. It is concluded that Na in the coal is released as NaCl, and no molten matter is found when the pyrolysis temperature is below 900 ℃.
- high sodium coal /
- pyrolysis /
- transformation of Na /
- thermodynamic equilibrium calculation

HTML全文

参考文献(21)

张守玉, 陈川, 施大钟, 吕俊复, 王健, 郭熙, 董爱霞, 熊绍武. 高钠煤燃烧利用现状[J]. 中国电机工程学报, 2013, 33(5): 1-12.(ZHANG Shou-yu, CHEN Chuan, SHI Da-zhong, LV Jun-fu, WANG Jian, GUO Xi, DONG Ai-xia, XIONG Shao-wu. Situation of combustion utilization of high sodium coal[J]. Proc CSEE, 2013, 33(5): 1-12.)

杨忠灿, 刘家利, 何红光. 新疆准东煤特性研究及其锅炉选型[J]. 热力发电, 2010, 39(8): 38-40.(YANG Zhong-can, LIU Jia-li, HE Hong-guang. Study on properties of Zhundong coal in Xinjiang region and type-section for boilers burning this coal sort[J]. Therm Power Gener, 2010, 39(8): 38-40.)

李勇. 燃煤过程中碱金属赋存、迁移规律数值模拟及试验研究[D].南京: 东南大学, 2006.(LI Yong. The experimental study and numerical simulation on the occurrence and migration mechanism of alkali during coal-fired process[D]. Nanjing: Southeast University, 2006.)

FURIMSKY E, ZHENG L. Quantification of chlorine and alkali emissions from fluid bed combustion of coal by equilibrium calculations[J]. Fuel Process Technol, 2003, 81(1): 7-21.

THOMPSON D, ARGENT B B. The mobilisation of sodium and potassium during coal combustion and gasification[J]. Fuel, 1999, 78(14): 1679-1689.

陈川, 张守玉, 刘大海, 郭熙, 董爱霞, 熊绍武, 施大钟, 吕俊复. 新疆高钠煤中钠的赋存形态及其对燃烧过程的影响[J]. 燃料化学学报, 2013, 41(7): 832-838.(CHEN Chuan, ZHANG Shou-yu, LIU Da-hai, GUO Xi, DONG Ai-xia, XIONG Shao-wu, SHI Da-zhong, LV Jun-fu. Existence form of sodium in high sodium coals from Xinjiang and its effect on combustion process[J].J Fuel Chem Technol, 2013, 41(7): 832-838.)

于强, 张健强. 燃用高钠煤对锅炉受热面的影响[J]. 锅炉制造, 2012, (4): 4-6.(YU Qiang, ZHANG Jian-qiang. Effect of burning high-sodium coal on boiler heating surface[J]. Boiler Manufact, 2012, (4): 4-6.)

LI C Z, SATHE C, KERSHAW J R, PANG Y. Fates and roles of alkali and alkaline earth metals during the pyrolysis of a Victorian brown coal[J]. Fuel, 2000, 79(3): 427-438.

QUYN D M, WU H, LI C Z. Volatilisation and catalytic effects of alkali and alkaline earth metallic species during the pyrolysis and gasification of Victorian brown coal. Part I. Volatilisation of Na and Cl from a set of NaCl-loaded samples[J]. Fuel, 2002, 81(2): 143-149.

WU H, HAYASHI J, CHIBA T, TAKAYUKI T, LI C Z. Volatilisation and catalytic effects of alkali and alkaline earth metallic speciesduringthepyrolysis andgasificationof Victorianbrown coal. Part V. Combined effects of Na concentration and char structure on char reactivity[J]. Fuel, 2004, 83(1): 23-30.

刘敬, 王智化, 项飞鹏, 黄镇宇, 刘建忠, 周俊虎, 岑可法. 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 Zhi-hua, XIANG Fei-peng, HUANG Zhen-yu, LIU Jian-zhong, ZHOU Jun-hu, CEN Ke-fa. Modes of occurrence and transformation of alkali metals in Zhundong coal during combustion[J]. J Fuel Chem Technol, 2014, 42(3): 316-322.)

卫小芳, 刘铁峰, 黄戒介, 房倚天, 王洋. 澳大利亚高盐煤中钠在热解过程中的形态变迁[J]. 燃料化学学报, 2010, 38(2): 144-148.(WEI Xiao-fang, LIU Tie-feng, HUANG Jie-jie, FANG Yi-tian, WANG Yang.Transformation of Na in an Australian high-sodium coal during pyrolysis[J]. J Fuel Chem Technol, 2010, 38(2): 144-148.)

郭瑞霞. 煤热解过程中若干微量有害元素转化行为的研究[D]. 太原: 中国科学院山西煤炭化学研究所, 2003.(GUO Rui-xia. Study on behavior of several trace elements during pyrolysis of coals[D]. Taiyuan: Institute of Coal Chemistry, Chinese Academy of Sciences, 2003.)

王珲, 宋蔷, 姚强, 陈昌和, 俞非漉. ICP-OES/ICP-MS测定煤中多种元素的微波消解方法研究[J]. 光谱学与光谱分析, 2012, 32(6): 1662-1665.(WANG Hui, SONG Qiang, YAO Qiang, CHEN Chang-he, YU Fei-lu. Study on microwave digestion of coal for the determination of multi-element by ICP-OES and ICP-MS[J]. Spectrosc Spect Anal, 2012, 32(6): 1662-1665.)

张军营, 任德贻, 赵峰华, 许德伟. 煤中微量元素赋存状态研究方法[J]. 煤炭转化, 1998, 21(4): 14-19.(ZHANG Jun-ying, REN De-yi, ZHAO Feng-hua, XU De-wei. Research methods of occurrence of trace elements in coal[J]. Coal Conver, 1998, 21(4): 14-19.)

ZHANG X Y, ZHANG H X, NA Y J. Transformation of sodium during the ashing of Zhundongcoal[C]. The 7^th World Congress of Particle Technology, 2014: 5.

GLAZER M P, KHAN N A, DE JONG W, SPLIETHOFF H, SCHVRMANN H, MONKHOUSE P. Alkali metals in circulating fluidized bed combustion of biomass and coal: Measurements and chemical equilibrium analysis[J]. Energy Fuels, 2005, 19(5): 1889-1897.

WEI X, HUANG J, LIU T, FANG Y, WANG Y. Transformation of alkali metals during pyrolysis and gasification of a lignite[J]. Energy Fuels, 2008, 22(3): 1840-1844.

SUGAWARA K, ENDA Y, INOUE H, SUGAWARA T, SHIRAI M. Dynamic behavior of trace elements during pyrolysis of coals[J]. Fuel, 2002, 81(11): 1439-1443.

陈安合, 杨学民, 林伟刚. 生物质热解和气化过程Cl及碱金属逸出行为的化学热力学平衡分析[J]. 燃料化学学报, 2008, 36(5): 539-547.(CHEN An-he, YANG Xue-min, LIN Wei-gang. Release characteristics of chlorine and alkali metals during pyrolysis and gasification of biomass by thermodynamicalequilibrium analysis[J]. J Fuel Chem Technol, 2008, 36(5): 539-547.)

WEI X, SCHNELL U, HEIN K R G. Behaviour of gaseous chlorine and alkali metals during biomass thermal utilisation[J]. Fuel, 2005, 84(7): 841-848.

施引文献

资源附件(0)

访问统计