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Slag properties of blending coal in an industrial OMB coal water slurry entrained-flow gasifier

机译：工业OMB水煤浆气流床气化炉中混煤的矿渣特性。

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摘要

Blending coal as feedstock is a potential cost-effective way to reduce the gasifier operation cost. Slag properties of blending coal from an industrial Opposed Multi-Burner (OMB) coal water slurry entrained-flow gasifier was investigated in this paper. Experimental data from an OMB entrained-flow gasifier using a blend of high quality coal with a relatively high ash content coal as feedstock were analyzed. The transformation behaviors of the slag from an industrial gasifier were investigated by viscosity analysis and thermodynamic calculation with assistance of FactSage software and validated by the industrial data. The results show that the slag properties were diversified and differ based on the coal blending ratios. It was discovered that the optimized blending ratio (high quality coal/high ash content coal) was in the range of 0.3-0.5. Most of the mineral matter was transformed into Ca aluminosilicates with relatively high liquidus temperatures around 1500℃. As the proportion of coal with higher ash and SiO_2 content increases, the slag shows a trend of transformation to mullite. The liquidus temperature decreased at first and then increased gradually as the ratio was increased, which provided a minimum blending ratio of ～0.3, consequently with about 8% reduction of feeding cost. Meanwhile, the viscosity of the slag also increased as the blending ratio of higher ash and SiO_2 content coal increased. At this point it should be noted that the loading and operating temperature of the gasifier had to be adjusted as the blending ratio fluctuated in order to maintain proper operation.
机译：混合煤炭作为原料是降低气化炉运行成本的一种潜在的经济有效方式。研究了工业对置多燃烧器（OMB）水煤浆气流床气化炉的掺混煤渣性能。分析了OMB气流床气化炉的实验数据，该气化炉使用高品质煤和较高灰分的煤作为原料进行了混合。在FactSage软件的帮助下，通过粘度分析和热力学计算研究了工业气化炉炉渣的转化行为，并通过工业数据进行了验证。结果表明，炉渣性能因煤配比而异。发现最佳混合比（优质煤/高灰分煤）在0.3-0.5的范围内。大部分矿物物质都转变为液相线温度在1500℃左右的较高温度的硅铝酸钙。随着灰分和SiO_2含量较高的煤的比例增加，矿渣呈现出向莫来石的转变趋势。液相线温度首先降低，然后随着比例的增加而逐渐升高，这使得最低混合比达到约0.3，从而使进料成本降低了约8％。同时，随着较高灰分和SiO 2含量煤的混合比增加，矿渣的粘度也增加。在这一点上，应该注意的是，随着混合比的变化，气化炉的负载和工作温度必须进行调整，以保持正常运行。

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  • 来源
    《Energy Conversion & Management》 |2014年第10期|683-688|共6页
  • 作者

    Qinghua Guo; Zhijie Zhou; Fuchen Wang; Guangsuo Yu;

  • 作者单位

    Key Laboratory of Coal Gasification and Energy Chemical Engineering of Ministry of Education, Shanghai Engineering Research Center of Coal Gasification, East China University of Science and Technology, Shanghai 200237, PR China;

    Key Laboratory of Coal Gasification and Energy Chemical Engineering of Ministry of Education, Shanghai Engineering Research Center of Coal Gasification, East China University of Science and Technology, Shanghai 200237, PR China;

    Key Laboratory of Coal Gasification and Energy Chemical Engineering of Ministry of Education, Shanghai Engineering Research Center of Coal Gasification, East China University of Science and Technology, Shanghai 200237, PR China;

    Key Laboratory of Coal Gasification and Energy Chemical Engineering of Ministry of Education, Shanghai Engineering Research Center of Coal Gasification, East China University of Science and Technology, Shanghai 200237, PR China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Entrained-flow gasification; Blending coal; Slag; Viscosity;

    机译：气流床气化;混合煤;矿渣;黏度;

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