[1]黄亚继,金保升,仲兆平,等.煤燃烧过程中痕量元素的分类研究[J].东南大学学报(自然科学版),2003,33(2):148-152.[doi:10.3969/j.issn.1001-0505.2003.02.008]
 Huang Yaji,Jin Baosheng,Zhong Zhaoping,et al.Study on groups of trace elements during coal combustion[J].Journal of Southeast University (Natural Science Edition),2003,33(2):148-152.[doi:10.3969/j.issn.1001-0505.2003.02.008]
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煤燃烧过程中痕量元素的分类研究()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
33
期数:
2003年第2期
页码:
148-152
栏目:
能源与动力工程
出版日期:
2003-03-20

文章信息/Info

Title:
Study on groups of trace elements during coal combustion
作者:
黄亚继 金保升 仲兆平 周宏仓
东南大学洁净煤发电及燃烧技术教育部重点实验室,南京 210096
Author(s):
Huang Yaji Jin Baosheng Zhong Zhaoping Zhou Hongcang
Key Laboratory of Clean Power Generation and Combustion Technology of Ministry of Education, Southeast University, Nanjing 210096, China
关键词:
痕量元素 元素分类 相对富集系数
Keywords:
trace elements group of elements relative enrichment factor
分类号:
TK16
DOI:
10.3969/j.issn.1001-0505.2003.02.008
摘要:
采用原子吸收分光光度计(带测汞装置)、石墨炉原子吸收光谱仪和X射线荧光光谱仪,测定了一台220 t/h煤粉炉中原煤、底渣和飞灰中9种痕量元素的质量分数.除As因质量分数低不能归类外,其他痕量元素按照在飞灰中相对富集系数不同,可分成3类:第1类是Pb,Zn; 第2类是Mn,Cr,Se,Hg; 第3类是Ba,Cd.按照飞灰相对于底渣痕量元素富集程度不同,可分成两类:第1类是Mn,Cr; 第2类是Pb,Ba,Se,Zn,Cd,Hg.按照痕量元素挥发性和在燃烧产物中的分布规律,可分成3类:第1类是Hg; 第2类是Pb,Ba,Zn,Cd; 第3类是Mn. Se介于第1类元素和第2类元素之间.Cr同时表现出第1类和第3类元素性质.研究还发现除Mn外,其他元素在飞灰中的富集程度随粒径减小而增加; Pb比Cd更容易挥发.
Abstract:
Groups of trace elements during coal combustion are summarized at the beginning of this paper. By using two kinds of atomic absorption spectroscopy and X-ray fluorescence, the contents of nine trace elements in raw coal, bottom ash and fly ashes were measured in a 220 t/h pulverized coal boiler. As content in coal and particle ash is too low to be classified. Other elements may be classified into three groups according to the contents in fly ash: group 1: Pb, Zn; group 2: Mn, Cr, Se, Hg; group 3: Ba, Cd. According to the different relative enrichment degree of trace elements in fly ash compared with that in bottom ash, these elements may be classified into two groups: group 1:Mn, Cr and group 2: Pb, Ba, Se, Zn, Cd, Hg. In addition, these trace elements may also be classified into three groups according to their occurrence and volatility during combustion: group 1: Hg; group 2: Pb, Ba, Zn, Cd; group 3:Mn. Se may be located between group 1 and group 2. Cr has properties of both group 1 and group 3. It is also found that the relative enrichments of trace elements(except Mn)increase with decreasing fly ash particle size. Pb has a stronger volatilization than Cd.

参考文献/References:

[1] Nraigu J O,Pacyna J M.Quantitative assessment of worldwide contamination of air water and soils by trace metals [J].Nature,1988,333:134-139.
[2] Nraigu J O.A global assessment of natural sources of atmospheric trace metals [J].Nature,1989,338:47-49.
[3] Meij R.Trace elements behavior at coal-fired power plants[J].Fuel Process Technology,1994,39:199-217.
[4] Clarke L,Sloss L.Trace elements:emissions from coal combustion and gasification[R].London:IEA Coal Research.IEACR/49,1992.
[5] Yan Rong,Gauthier Daniel,Flamant Gilles.Volatility and chemistry of trace element in a coal combustor [J].Fuel,2001,80:2217-2226.
[6] Klein D H,Andren A W,Carter J A,et al.Pathways of thirty-seven trace elements through coal-fired power plant[J].Environment Science Technology,1975,9(10):973-979.
[7] Aunela-Tapola,Hatanpaa E,Hoffren H,et al.A study of trace elements behavior in two modern coal-fired power plants:Ⅱ trace element balances in two plants equipped with semi-dry flue gas desulphurication facilities[J].Fuel Process Technology,1998,55:13-34.
[8] Markowski G R,Ensor D S,Hooper R C,et al.A submicron aerosol mode in flue gas from a pulverized coal utility boiler[J].Environ Sci Technol,1980,14(11):1400-1402.
[9] Querol X,Fernandez-Truiel J L,Lopez-Soler A.Trace elements in coal and their behavior during combustion in a large power station[J].Fuel, 1995,17(3):331-343.
[10] 欧阳中华,曾汉才,陆晓华,等.煤燃烧产生的细微粒子中重金属元素富集性的实验研究[J].燃烧科学与技术,1996,2(2):111-120.
  Ouyang Zhonghua,Zeng Hancai,Lu Xiaohua,et al.The investigation of the enrichment of heavy metals in fine particles in coal combustion[J]. Journal of Combustion Science and Technology,1996,2(2):111-120.(in Chinese)
[11] Constance L,Senior,Lawrence E,et al.Pilot scale study of trace element vaporization and condensation during combustion of a pulverized sub-bituminous coal[J]. Fuel Processing Technology,2000,63:149-165.
[12] Vassilev Stanislaw V,Eskenazy Greta M,Vassileva Christina G.Behaviour of elements and minerals during preparation and combustion of the Pernik coal [J].Bulgaria Fuel Processing Technology,2001,72:103-129.

相似文献/References:

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备注/Memo

备注/Memo:
基金项目: 国家重点基础研究发展规划资助项目子课题(G19990221053)、教育部跨世纪优秀人才基金资助项目(K980026)、教育部骨干教师基金江苏“青蓝工程”基金资助项目(JS9808).
作者简介: 黄亚继(1975—),男,博士生; 金保升(联系人),男,教授,博士生导师,heyyj@sina.com.
更新日期/Last Update: 2003-03-20