Academic Center

All Issues
Latest Issue
Most Download Articles
Most Read Articles
Full Text Download
2015 Issue 01

Analysis on reaction process of underground coal gasification and stable control technique


LIU Shu-qin CHEN Feng PANG Xu_-lin DU Ming-hua ZHANG Ming

Author Unit:

China University of Mining and Technology( Beijing) ENN Gasification and Mining Company Limited

Key Words:

underground coal gasification; precipitation process; technique control; moving bed gasification; chemical coal mining;
  • Abstract
  • Paper Chart
  • Related Articles
  • Citation Format
To know clearly the reaction process of underground coal gasification was the theoretical base to set up the stable control technique. In comparison with the moving bed gasification,an expression of the underground coal gasification was a fixed seam,but the reaction area was in moving,the reaction process was limited by the h eat spalling and thermal fragmentation of the two side seams along the gasified channel. The essence was a percolation channel reaction with different size lump coal,sea m parting,roof falling rock mixed. With the analysis,the precipitation process of the underground coal gasification could explain gas precipitation process in the radial coal wall along the gasification channel,an axial gasification process along the gasification channel,secondary combustion of the combustible components in the aerobic area of the gasification channel and a water-gas exchanging reaction process in the air flow channel. As for a single reaction period,with the coal consumption,gasification channel expanded,secondary combustion enhanced and gas quality reduced,the stable period would be terminated. With an application of a control technique,such as the retreated gasification at an injection point,the parameters adjustment could be applied to control the fluctuation scope of single periodic gas components and could realize the conne ction of multi production periods in order to realize the stable production of the underground coal gasification.
No Content Yet
May 15th,2022

Contact Us

  • All Rights of Website Desige Reserved©《COAL SCIENCE AND TECHNOLOGY》Editorial Department
  • 京ICP备05086979号-19

  • Address:8th Floor, Coal Building, District 13, Heping Street, Chaoyang District, Beijing:Ad & Finance Department(Room 1204),Editorial Department(Room 811)
  • Telephone:010-87986431(Ad Consult)
  • Mailbox: