压力对加压煤气化过程中氮释放的影响

刘安琪; 赵增立; 武宏香; 王小波; 郑安庆; 李海滨; 张尚武; 黄戒介

压力对加压煤气化过程中氮释放的影响

1.
中国科学院广州能源研究所中国科学院可再生能源与天然气水合物重点实验室, 广东广州 510640;
2.
中国科学院山西煤炭化学研究所山西省粉煤气化工程研究中心, 山西太原 030001

基金项目: 国家高技术研究发展计划(863计划, 2008AA050302-06); 中国科学院广州能源所所长基金(o807pk1001)。

详细信息

通讯作者:
赵增立(1972-),Tel:020-87057721,Fax:020-87057737,E-mail:zhaozl@ms.giec.ac.cn。

中图分类号: TQ53
计量
- 文章访问数: 1704
- HTML全文浏览量: 12
- PDF下载量: 624
- 被引次数: 0
出版历程
- 收稿日期: 2012-05-21
- 修回日期: 2012-07-25
- 刊出日期: 2013-01-31

Influence of pressure on the release of nitrogen during pressurized gasification of coal

1.
Key Laboratory of Renewable Energy and Gas Hydrate, Guangzhou Institute of Energy Conversion, Chinese Academy of Science, Guangzhou 510640, China;
2.
Shanxi Coal Gasification Engineering Research Center, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China

摘要

摘要: 为了解大型加压煤气化过程中污染物分布状态及其影响因素,着重研究了压力对加压大型煤气化过程中氮释放的影响。对晋城无烟煤在φ800 mm加压灰熔聚流化床煤气化实验进行跟踪采样分析,水蒸气和氧气作为气化介质(Steam/O₂≈3/1, 体积比),气化炉内反应温度为1 000℃,考察0.6、1.0、1.5、2.0 MPa四种气化压力下氮化物在产物中的分布。结果表明,氮元素主要分布在气相产物中,随着气化压力增大固相产物中的氮含量增加,气相产物的氮含量先增加,在1.0 MPa以后呈现略微下降的趋势,并通过对比分析晋城无烟煤和气化底渣的氮赋存形态,从微观层面进一步探讨压力对氮分布规律的影响方式。
- 煤气化 /
- 压力 /
- 氮
Abstract: A comprehensive knowledge of the release characteristics of inorganic compounds is required by the designing of gas scrubbing and hot gas cleaning technology. The principal objective of this work was to examine the influence of pressure on the release of nitrogen during pressurized coal gasification in a pilot-scale pressurized ash agglomerating fluidized bed facility with 800 mm i.d.. Jincheng anthracite was gasified at gage pressures of 0.6, 1.0, 1.5 and 2.0 MPa with steam/O₂ (3/1, volume ratio) at 1 000℃. The analysis of nitrogen content and form in hot gas and solid by-product was carried out. The quantitative analysis results show that most of nitrogen is transferred into gas phase, which is slightly changed after 1.0 MPa coupled with an enrichment of nitrogen in solid phase with the increase in pressure. The discussion on the mechanism of nitrogen release at pressure was carried out by contrast analysis of nitrogen form in the coal and bottom ash at microcosmic level.
- coal gasification /
- pressure /
- nitrogen

HTML全文

参考文献(21)

曹征彦. 中国洁净煤技术[M]. 北京: 中国物质出版社, 1998. (CAO Zheng-yan. Clean coal technology in China[M]. Beijing: China Material Press, 1998.)

黄南, 典富, 盛宏至. 煤部分气化技术及半焦燃烧的研究现状与展望[J]. 江西能源, 2002, (2): 1-4,9. (HUANG Nan, DAN Fu, SHENG Hong-zhi. Development and expectation on parcel gasification and the combustion of the semicoal[J]. Jiangxi Energy, 2002, (2): 1-4,9.)

XU C, DONALD J, BYAMBAJAV E, OHTSUKA Y. Recent advances in catalysts for hot-gas removal of tar and NH₃ from biomass gasification[J]. Fuel, 2010, 89(8): 1784-1795.

SOLOMON P R, COLKET M B. Evolution of fuel nitrogen in coal devolatilization[J]. Fuel, 1978, 57(12): 749-755.

NELSON P F, KELLY M D, WORNAT M J. Conversion of fuel nitrogen in coal volatiles to NOx precursors under rapid heating conditions[J]. Fuel, 1991, 70(3): 403-407.

KAMBARA S, TAKARAADA T, TOYOSHIMA M, KATO K. Relation between functional forms of coal nitrogen and NOx emission from pulverized coal combustion[J]. Fuel, 1995, 74(9): 1247-1253.

LI Chunzhu, PANG Yanyuan, LI Xiguang. Formation of NH₃ during the pyrolysis of a brown coal[C]// 15th Annual International Pittsburth Coal Conference, Proc. Taiwan: 1998.

袁帅, 李军, 陈雪莉, 代正华, 周志杰, 王辅臣. 吡咯型氮快速热解中NH₃和HCN生成机理研究[J]. 燃料化学学报, 2011, 39(11): 801-805. (YUAN Shuai, LI Jun, CHEN Xue-li, DAI Zheng-hua, ZHOU Zhi-jie, WANG Fu-chen. Study on NH₃ and HCN formation mechanisms during rapid pyrolysis of pyrrolic nitrogen[J]. Jourual of the Journal of Fuel Chemistry and Technology, 2011, 39(11): 801-805.)

JOHNSSON J E. Formation and reduction of nitrogen oxides in fluidized-bed combustion[J]. Fuel, 1994, 73(9): 1398-1415.

PARK D C, DAY S J, NELSON P F. Formation of N-containing gas-phase species from char gasification in steam[J]. Fuel, 2008, 87(6): 807-814.

赵浮, 李定凯, 吕子安, 崔琳. 水蒸气流化下煤气化气态污染物释放研究: 1 污染物生成与脱硫实验研究[J]. 环境科学学报, 1998, 18(3): 225-229. (ZHAO Fu, LI Ding-kai, LV Zi-an, CUI Lin. Gaseous pollutants emission during coal gasification in a steam fluidised bed: 1 Experimental study on pollutants formation and sulphur capture[J]. Acta Scientiae Circumstantiae, 1998, 18(3): 225-229.)

房倚天, 王洋, 马小云, 黄戒介, 吴晋沪, 程中虎, 陈寒石. 灰熔聚流化床粉煤气化技术加压大型化研发新进展[J]. 煤化工, 2007, 28(1): 11-15. (FANG Yi-tian, WANG Yang, MA Xiao-yun, HUANG Jie-jie, WU Jin-hu, CHENG Zhong-hu, CHEN Han-shi. New progress in development of pressurized ash agglomerating fluidized bed coal gasification technology[J]. Coal Chemical Industry, 2007, 28(1): 11-15.)

POCHAN M J, MASSEY M J. Design and operation of a sampling train for the analysis of effluents in coal gasification gas-phase process streams. Pittsburgh: Carnegie-Mellon Univ, 1978.

徐奕丰, 陈寒石, 黄戒介, 张建民, 张海生, 王洋. 灰熔聚流化床粉煤气化技术[J]. 化肥工业, 1997, 24(5):27-29. (XU Yi-feng, CHEN Han-shi, HUANG Jie-jie, ZHANG Jian-min, ZHANG Hai-sheng, WANG Yang. Fluid-bed pulverized coal gasification technology with ash fusion agglomeration[J]. Chemical Fertilizer Industry, 1997, 24(5): 27-29.)

HAIFENG Z, THOMAS H F. Nitrogen transformations during secondary coal pyrolysis[J]. Energy Fuels, 2001, 15(6): 1512-1522.

WALL T F, LIU G S, WU H W, ROBERTS D G, BENFELL K E, GUPTA S, LUCAS J A, HARRIS D J. The effects of pressure on coal reactions during pulverised coal combustion and gasification[J]. Prog Energy Combust Sci, 2002, 28(5): 405-433.

张树国, 刘海峰, 高洪培. 煤中氮元素迁徙规律的研究进展[J]. 洁净煤技术, 2008, 14(1): 89-91. (ZHANG Shu-guo, LIU Hai-feng, GAO Hong-pei. Advanced research of the conversion law of coal nitrogen[J]. Clean Coal Technology, 2008, 14(1): 89-91.)

KELEMEN S R, GORBARY M L, KWIATEK P J. Quantification of nitrogen forms in Argonne premium coals[J]. Energy Fuels, 1994, 8(4): 896-906.

THOMAS K M. The release of nitrogen oxides during char combustion[J]. Fue1, 1997, 76(6): 457-473.

WÓJTOWICZ M A, PELS J R, MOULIJN J A. The fate of nitrogen functionalities in coal during pyrolysis and combustion[J]. Fuel, 1995, 74(4): 507-516.

刘艳华. 煤中氮/硫的赋存形态及其变迁规律研究[D]. 西安: 西安交通大学能源与动力工程学院热能工程系, 2002. (LIU Yan-hua. An investigation on the forms and their fates of coal nitrogen/sulfur functionalities[D], Xi'an: Xi'an Jiaotong University, 2002.)

施引文献

资源附件(0)

访问统计