A back analysis of the temperature field in the combustion volume space during underground coal gasification

被引：1

作者：

Chen, Liang ^{[1
]}

Chaohu, Hou ^{[1
]}

Chen, Jiansheng ^{[2
]}

Jiting, Xu ^{[1
]}

机构：

[1] Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Geotechnical Engineering Research Institute, Hohai University

[2] School of Geoscience and Engineering, Hohai University

来源：

Mining Science and Technology | 2011年 / 21卷 / 04期

关键词：

Back analysis; Combustion space area; Gasification channel; Temperature field; Underground coal gasification;

D O I：

10.1016/j.mstc.2011.06.018

中图分类号：

学科分类号：

摘要：

The exact shape and size of the gasification channel during underground coal gasification (UGC) are of vital importance for the safety and stability of the upper parts of the geological formation. In practice existing geological measurements are insufficient to obtain such information because the coal seam is typically deeply buried and the geological conditions are often complex. This paper introduces a cylindrical model for the gasification channel. The rock and soil masses are assumed to be homogeneous and isotropic and the effect of seepage on the temperature field was neglected. The theory of heat conduction was used to write the equation predicting the temperature field around the gasification channel. The idea of an excess temperature was introduced to solve the equations. Applying this model to UCG in the field for an influence radius, r, of 70 m gave the model parameters, u1,2,3. . ., of 2.4, 5.5, 8.7. . . By adjusting the radius (2, 4, or 6 m) reasonable temperatures of the gasification channel were found for 4 m. The temperature distribution in the vertical direction, and the combustion volume, were also calculated. Comparison to field measurements shows that the results obtained from the proposed model are very close to practice. © 2011 Published by Elsevier B.V. on behalf of China University of Mining & Technology.

引用

页码：581 / 585

页数：4

共 17 条

[1]

Liang J., Liu S.-Q., Yu L., Chang J., Method of stably controlling the process of underground coal gasification, Zhongguo Kuangye Daxue Xuebao/Journal of China University of Mining & Technology, 31, 5, pp. 358-361, (2002)

[2]

Anil K., Mohammed Q., Sanjay M., Preeti A., Underground coal gasification: A new clean coal utilization technique for india, Energy, 32, pp. 2061-2271, (2007)

[3]

Liu S.Q., Li J.G., Mei M., Dong G.L., Groundwater pollution from underground coal gasification, J China Univ Mining Technol, 17, 4, pp. 467-472, (2007)

[4]

Yang L.-H., Liu Y.-G., Jiang G., Model test study on underground coal gasification in inclined coal seams, Zhongguo Kuangye Daxue Xuebao/Journal of China University of Mining & Technology, 31, 1, pp. 10-13, (2002)

[5]

Yang L.H., Liang J., Tem detection method of combustion space area in underground coal gasification, Nanjing Univ Sci Technol, 25, 2, pp. 200-204, (2001)

[6]

Shen F., Liang X.X., Mao W.Z., Li Y.L., Li W.J., Liang J., The present research and development of underground coal gasification in china, Energy Source Eng, 1, pp. 5-10, (2008)

[7]

Sateesh D., Ramesh N.M., Laboratory studies on combustion cavity growth in lignite coal blocks in the context of ucg, Energy, 35, pp. 2374-2386, (2010)

[8]

Britten J.A., Thorsness C.B., Model for cavity growth and resource recovery during underground coal gasification, Situ Oil Coal Shale Miner, 13, pp. 1-53, (1989)

[9]

Perkins G., Sahajwalla V., A numerical study of the effects of operating condition sand coal properties on cavity growth in cavity growth in lignite coal blocks in the context of ucg, Energy, 35, pp. 2374-2386, (2010)

[10]

Yang L.H., Liu S.Q., Liang J., Numerical analysis of dynamic temperature field and concentration field in the process of underground coal gasification, J China Univ Mining Technol, 32, 4, pp. 349-353, (2003)

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