高钠煤水热脱钠处理及其对燃烧特性的影响

赵冰; 王嘉瑞; 陈凡敏; 王小悦; 李小江

高钠煤水热脱钠处理及其对燃烧特性的影响

华电电力科学研究院, 浙江杭州 310030

基金项目: 浙江省钱江人才项目(2013R10080); 国家科技部国际科技合作项目(2013DFG61490)。

详细信息

通讯作者:
王嘉瑞, Tel: 0571-85246729, E-mail: jiarui-wang@chder.com。

中图分类号: TQ536.1
计量
- 文章访问数: 713
- HTML全文浏览量: 23
- PDF下载量: 584
- 被引次数: 0
出版历程
- 收稿日期: 2014-07-08
- 修回日期: 2014-09-13
- 刊出日期: 2014-12-30

Hydrothermal treatment to remove sodium from high sodium coal and its influence on combustion characteristics

Hua Dian Electric Power Research Institute, Hangzhou 310030, China

摘要

摘要: 以五彩湾高钠煤为研究对象,根据煤中钠的赋存形态,分别研究了不同条件下水洗和水热处理两种方式对碱金属的脱除效果,同时考察了水热处理对煤燃烧特性的影响。结果表明,五彩湾煤中钠主要以水溶性钠盐存在;单纯水洗对Na的脱除效果不理想,并且工艺耗时长、耗水量大;水热处理脱钠效率高,钠脱除率高达90.5%,处理后的煤灰中Na₂O含量降至0.7%,属于低钠煤范围;水热处理后煤样的燃烧速率曲线移向低温区,燃烧特性优于原煤。
- 高钠煤 /
- 赋存形态 /
- 脱钠 /
- 燃烧特性
Abstract: Considering the form of sodium existing in coal, series of water washing and hydrothermal treatments were used to remove alkali metals from a high sodium coal from Wucaiwan. The variation of combustion characteristics of coal after pretreatment was investigated. The results show that the sodium in the coal mainly exists as water-soluble form. The Na removal ratio by water washing treatment does not reach the expectation with the characteristics of time consuming and high water consumption. The hydrothermal treatment is effective in sodium removal as high as 90.5%, and Na₂O content in the ash decreases to 0.7% which belongs to the scope of low sodium level in coal ash. The burning curves of coal samples after hydrothermal treatment move to the low temperature zone, and the combustion characteristics is improved compared with raw coal.
- high sodium coal /
- existing form /
- sodium remove /
- combustion characteristics

HTML全文

参考文献(20)

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 preperties of Zhundong coal in Xinjiang region and type-selection for boilers burning this coal sort[J]. Thermal Power Generation, 2010, 39(8): 38-40.)

陈川, 张守玉, 施大钟, 刘大海. 准东煤脱钠提质研究[J]. 煤炭转化, 2013, 36(4): 14-18. (CHEN Chuan, ZHANG Shou-yu, SHI Da-zhong, LIU Da-hai. Study on sodium removal for Zhundong coal upgrading[J]. Coal Conversion, 2013, 36(4): 14-18.)

张守玉, 陈川, 施大钟, 王健. 一种高钠煤固钠方法: 中国, 103421575A[P]. 2013-12-04. (ZHANG Shou-yu, CHEN Chuan, SHI Da-zhong, WANG Jian. A method to fix sodium from the high sodium content coal: CN, 103421575A[P]. 2013-12-04.)

常家星, 杨忠灿. 能够保证锅炉安全运行的准东煤灰沾污指标研究[J]. 锅炉技术, 2013, 44(6): 17-20. (CHANG Jia-xing, YANG Zhong-can. Study on Zhundong coal's ash fouling indicator to ensure safe operation of boilers[J]. Boiler Technology, 2013, 44(6): 17-20.)

刘小伟, 徐明厚, 姚洪, 于敦喜, 吕当振, 张会兴. 煤中钠元素赋存形态对亚微米颗粒物形成的影响研究[J]. 工程热物理学报, 2009, 30(9): 1589-1592. (LIU Xiao-wei, XU Ming-hou, YAO Hong, YU Dun-xi, LV Dang-zhen, ZHANG Hui-xing. Study of occurrence mode of sodium effect on the submicron ash paticle formtion during coal combustion[J]. Journal of Engineering Thermophysics, 2009, 30(9): 1589-1592.)

SHEVKOPLYAS V N, SARANCHUK V I. The impregnation effect on low and middle rank coals structure reorganization and their behavior during pyrolysis[J]. Fuel, 2000, 79(5): 557-565.

LI C Z. Some recent advances in the understanding of the pyrolysis and gasification behaviour of Victorian brown Coal[J]. Fuel, 2007, 86(12/13): 1664-1683.

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(3/4): 427-438.

FAVAS G, JACKSON W R. Hydrothermal dewatering of lower rank coals. 1. Effects of process conditions on the properties of dried product[J]. Fuel, 2003, 82(1): 53-57.

FAVAS G, JACKSON W R. Hydrothermal dewatering of lower rank coals. 2. Effects of coal characteristics for a range of Australian and international coals[J]. Fuel, 2003, 82(1): 59-69.

FAVAS G, JACKSON W R, MARSHALL M. Hydrothermal dewatering of lower rank coals. 3. High-concentration slurries from hydrothermally treated lower rank coals[J]. Fuel, 2003, 82(1): 71-79.

刘红缨, 郜翔, 张明阳, 朱彦敏, 朱书全. 水热法改性褐煤及含氧官能团与水相互作用的研究[J]. 燃料化学学报, 2014, 42(3): 284-289. (LIU Hong-ying, GAO Xiang, ZHANG Ming-yang, ZHU Yan-min, ZHU Shu-quan. Study on lignite modified by hydrothermal and the interaction between the oxygen containing functional groups and water[J]. Journal of Fuel Chemistry and Technology, 2014, 42(3): 284-289.)

赵卫东, 刘建忠, 周俊虎, 曹晓哲, 张光学, 岑可法. 低阶煤高温高压水热处理改性及其成浆特性[J]. 化工学报, 2009, 60(6): 1560-1567. (ZHAO Wei-dong, LIU Jian-zhong, ZHOU Jun-hu, CAO Xiao-zhe, ZHANG Guang-xue, CEN Ke-fa. Hot water treatment of low rank coal in high temperature and high pressure reactor and its slurry ability[J]. Journal of Chemistry Industry, 2009, 60(6): 1560-1567.)

张守玉, 陈川, 施大钟, 吕俊复, 王建, 郭熙, 董爱霞, 熊邵武. 高钠煤燃烧利用现状[J].中国电机工程学报, 2013, 33(5): 1-11. (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]. Proceedings of the CSEE, 2013, 33(5): 1-11.)

贺业光, 杨天华, 孙洋, 魏砾宏, 李润东. 钾对秸秆混煤燃烧特性影响的研究[J]. 燃料化学学报, 2011, 39(7): 507-512. (HE Ye-guang, YANG Tian-hua, SUN Yang, WEI Li-hong, LI Run-dong. Influence of potassium on co-combustion characteristic of coal and straw[J]. Journal of Fuel Chemistry and Technology, 2011, 39(7): 507-512.)

孙学信. 燃煤锅炉燃烧试验技术与方法[M]. 北京: 中国电力出版社, 2001. (SUN Xue-xin. Combustion test technology and method of coal-fired boiler[M]. Beijing: China Electric Power Press, 2001.)

卫小芳, 黄戒介, 房倚天, 王洋. 外加NaC1和NaAc褐煤在气化过程中钠的形态变迁规律研究[J]. 燃料化学学报, 2009, 37(1): 6-10. (WEI Xiao-fang, HUANG Jie-jie, FANG Yi-tian, WANG Yang. Transformation of sodium during gasification of a lignite with addition of NaCl and NaAc[J]. Journal of Fuel Chemistry and Technology, 2009, 37(1): 6-10.)

ENDERS M, WILLENBORG W, ALBRECHT J, PUTNIS A. Alkali retention in hot slag under controlled oxidizing gas atmospheres[J]. Fuel Process Technol, 2000, 68(1): 57-73.

汉春利, 张军, 颜峥, 顾璠, 刘坤磊, 徐益谦. 钠在煤燃烧初期释放特性的多元相关分析[J]. 燃烧科学与技术, 2002, 8(5): 395-398. (HAN Chun-1i, ZHANG Jun, YAN Zheng, GU Fan, LIU Kun-lei, XU Yi-Qian. Multivariate stafstical analysis on the behaviour of sodium of coal in the initial stage of combustion[J]. Journal of Combustion Science and Technology, 2002, 8(5): 395-398.)

谢克昌. 煤的结构与反应性[M]. 北京, 科学出版社, 2002. (XIE Ke-chang. Coal structure and its reactivity[M]. Beijing: Science Press, 2002.)

施引文献

资源附件(0)

访问统计