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Citation: YANG Guang, ZHANG Yan-wei, KOU Xi-wen, ZHOU Zhi-jun, WANG Zhi-hua, ZHOU Jun-hu, CEN Ke-fa. Mineral conversion and thermodynamic simulation of ash deposition during Zhundong coal combustion in boiler of thermal power plant[J]. Journal of Fuel Chemistry and Technology, ;2015, 43(10): 1182-1187. shu

Mineral conversion and thermodynamic simulation of ash deposition during Zhundong coal combustion in boiler of thermal power plant

  • 1.

    State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China

  • Corresponding author: ZHANG Yan-wei, 
  • Received Date: 12 May 2015
    Available Online: 8 July 2015

    Fund Project: 国家重点基础研究发展规划(973计划,2012CB214906)资助项目 (973计划,2012CB214906)

  • Zhundong coal blending was combusted in a 350 MW boiler. Ash deposits samples at different heat transfer surface (HTS) were collected to investigate mineral conversion of each sample. Thermodynamic equilibrium calculation was carried out to give theoretical support by virtue of Factsage 5.2. Different mechanism of each HTS was concluded as follows. At high temperature HTS, albite, anorthite and other phases help eutectics precipitate take shape, which adheres to fly ash particles and forms indurate bulk ash deposits. At low temperature HTS, sulphur-containing species are condensed from flue gas to form deposits with evidence that the main crystalline phase is anhydrite. At economizer HTS, The deposits consisted of amorphous phases carried by flue gas are loosely bonded. Calculated results by Factsage basically agreed with the phase composition of actual samples and are of assistance to mineral conversion analyses.
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