CHENG Jun, ZHOU Jun-hu, LIU Jian-zhong, ZHOU Zhi-jun, CAO Xin-yu, CEN Ke-fa. 大型电站煤粉炉自身固硫灰渣的微观晶相分析[J]. Journal of Fuel Chemistry and Technology, 2005, 33(01): 38-42.
Citation: CHENG Jun, ZHOU Jun-hu, LIU Jian-zhong, ZHOU Zhi-jun, CAO Xin-yu, CEN Ke-fa. 大型电站煤粉炉自身固硫灰渣的微观晶相分析[J]. Journal of Fuel Chemistry and Technology, 2005, 33(01): 38-42.

大型电站煤粉炉自身固硫灰渣的微观晶相分析

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  • Corresponding author: CHENG Jun
  • Received Date: 2004-04-08
  • Rev Recd Date: 2005-01-05
  • Publish Date: 2005-02-28
  • The crystal compositions of self-desulfurization residues produced in a 1 025 t/h pulverized coal fired boiler using Shenmu coal were studied, which had the self-desulfurization efficiencies of 27%~33% at the full steam load. It is found by XRD analysis that the amorphous phase content is 91.2% and the CaCO3 content is 2.1% in the feed coal. In the fly ash derived from coal combustion at the full steam load, the vitreous phase content is 70.5% and the sulfation product CaSO4 content is 3.4%, while the CaCO3 and CaO contents are 4.7% and 2.2%, respectively. In the bottom ash, the albite content is 59.2% and the vitreous phase content is 25.7%, but none of CaSO4, CaCO3 and CaO phase is detected. With a decreaseof steam load of the boiler, the vitreous phase content in fly ash decreases but that in bottom ash increases.
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