Please wait a minute...
J4  2009, Vol. 43 Issue (5): 942-947    DOI: 10.3785/j.issn.1008-973X.2009.05.030
能源与环境工程     
煤粉燃烧过程中汞析出过程的数值模拟
朱燕群,周劲松,何胜,岑可法
(浙江大学 能源清洁利用国家重点实验室,浙江 杭州 310027)
Numerical simulation on mercury emission during coal combustion
ZHU Yan-qun, ZHOU Jin-song, HE Sheng, CEN Ke-fa
(State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China)
 全文: PDF(1695 KB)   HTML
摘要:

利用计算流体动力学(CFD)对一台410 t/h四角切圆煤粉燃烧锅炉进行数值模拟研究,在CFD计算基础上加入了Hg反应的子模型,计算得出在燃煤过程中Hg的生成、形态转化以及不同Hg形态在炉内的空间分布.结果表明,通过对整个三维炉膛体积的Hg形态的摩尔分数积分,炉内气相Hg0占94.22%,HgO占4.96%,HgCl2仅有0.82%;HgO、HgCl2在炉内分布较均匀,HgO主要分布在燃烧器区域,HgCl2主要分布在燃烧器和炉膛出口区域;HgO和HgCl2在燃煤过程中的生成途径是相同的,HgO和O2之间存在强烈的关联;HgCl2和Cl2之间存在强烈的关联,而与HCl和Cl的关联性不强;温度仅是促使HgCl2摩尔分数升高的间接因素.

Abstract:

Numerical simulation of a 410 t/h tangentially coal fired furnace was performed on a computational fluid dynamics (CFD) software platform, into which a sub model of mercury was introduced. The mercury formation, distribution and transformation during the coal combustion were simulated. The results show that the gaseous Hg0 is 94.22% of the total, HgO is 4.96%, HgCl2 is 0.82% in the furnace, according to the integration of mercury mole fraction of the three-dimensional furnace; HgO, HgCl2 are well distributed, HgO distributed in the burner area, HgCl2 distributed in the burner area and the exit of furnace; the formation mechanism of HgO is same as HgCl2, and HgO has close relation with O2, while HgCl2 relates with Cl2 instead of HCl and Cl. High flue gas temperature improves HgCl2 mole fraction indirectly.

出版日期: 2009-11-18
:  X511  
基金资助:

国家杰出青年基金资助项目(50525620);教育部博士点基金资助项目(20050335057);浙江省自然科学基金人才资助项目(R10753240).

通讯作者: 周劲松,男,教授,博导.     E-mail: zhoujs@cmee.zju.edu.cn
作者简介: 朱燕群(1981-),女,浙江武义人,助工,从事污染物控制研究.
服务  
把本文推荐给朋友
加入引用管理器
E-mail Alert
RSS
作者相关文章  

引用本文:

朱燕群, 周劲松, 何胜, 等. 煤粉燃烧过程中汞析出过程的数值模拟[J]. J4, 2009, 43(5): 942-947.

SHU Yan-Qun, ZHOU Jin-Song, HE Qing, et al. Numerical simulation on mercury emission during coal combustion. J4, 2009, 43(5): 942-947.

链接本文:

http://www.zjujournals.com/eng/CN/10.3785/j.issn.1008-973X.2009.05.030        http://www.zjujournals.com/eng/CN/Y2009/V43/I5/942

[1] HALL R E, LEE C W, SRIVASTAVA R K, et al. Mercury control technology—a review [C]∥ 4th International Conference on Combustion, Incineration/Pyrolysis and Emission Control (i-CIPEC). Kyoto: [s.n.], 2006: 1316.
[2] MERCEDES D S, UNTERBERGER S, HEIN K R G. Mercury emission control in coal-fired plants: the role of wet scrubbers [J]. Fuel Processing Technology, 2007, 88(1): 259263.
[3] 赵毅,于欢欣,贾吉林. 烟气脱汞技术研究进展[J]. 中国电力, 2006, 39(12): 5962.
ZHAO Yi, YU Huan-xin, JIA Ji-lin. Development of flue gas mercury control technology [J]. Electric Power, 2006, 39(12): 5962.
[4] HU Chang-xing, ZHOU Jin-song, LUO Zhong-yang, et al. Effect of oxidation treatment on the adsorption and the stability of mercury on activated carbon [J]. Journal of Environmental Science, 2006, 16(6): 11611166.
[5] 韩军,徐明厚,詹靖,等. 煤燃烧过程中汞排放的模拟[J]. 中国电机工程学报, 2003, 23(12): 208211.
HAN Jun, XU Ming-hou, ZHAN Jing, et al. Predicting the emission of mercury during coal combustion [J]. Proceedings of the CSEE, 2003, 23(12): 208211.
[6] 何杰,蒋旭光,岑可法. 煤燃烧过程中氯化氢的析出试验研究 [C]∥ 中国工程热物理学会燃烧学术会议. 青岛:CSET, 2001: 405410.
HE Jie, JIANG Xu-guang, CEN Ke-fa. Experiment of HCl precipitation during coal combustion [C]∥ Proceedings of Chinese Society of Engineering Thermophysics. Qingdao: CSET, 2001: 405410.
[7] 李寒旭,潘伟平,JENNIFFER K. TGA-MS联用技术对煤燃烧过程中氯的脱除特性研究[J]. 煤炭转化, 1996, 19(3): 3439.
LI Han-xu, PAN Wei-ping, JENNIFFER K. Study on emission of chlorine during coal combustion by TGA-MS [J]. Coal Conversion, 1996, 19(3): 3439.
[8] HALL B, SCHAGER P, LINDQVIST O. Chemical reactions of mercury in combustion flue gases [J]. Water, Air and Soil Pollution, 1991, 56(4): 314.
[9] SLIGER R N, LICH J C K, MARINOV N M. Towards the development of a chemical kinetic model for the homogeneous oxidation of mercury by chlorine species [J]. Fuel Processing Technology, 2000, 65/66: 423438.
[10] 高洪亮,周劲松,骆仲泱,等. SO2对模拟燃煤烟气中汞形态分布影响的实验[J]. 环境科学学报, 2004, 24(2): 204209.
GAO Hong-liang, ZHOU Jin-song, LUO Zhong-yang, et al. Effect of sulfur dioxide on the speciation of mercury in flue gases [J]. Acta Scientiae Circumstantiate, 2004, 24(2): 204209.
[11] 朱燕群,周劲松,蔡小舒,等. 燃煤过程中不同烟气组分对汞形态转化的影响[J]. 浙江大学学报:工学版, 2007, 41(2): 356360.
ZHU Yan-qun, ZHOU Jin-song, CAI Xiao-shu, et al. Effect of various flue gas compositions on mercury speciation transformation during coal combustion [J]. Journal of Zhejiang University: Engineering Science, 2007, 41(2): 356360.

No related articles found!