The Experts below are selected from a list of 15 Experts worldwide ranked by ideXlab platform

Shigang Kang - One of the best experts on this subject based on the ideXlab platform.

  • caking and Coking properties of the thermal dissolution soluble fraction of a fat coal
    Fuel Processing Technology, 2014
    Co-Authors: Hengfu Shui, Zhicai Wang, Tao Shui, Wenjuan Zhao, Chuanjun Shan, Shigang Kang
    Abstract:

    Abstract In the coal blending for coke-making, fat coal has a very important role for the caking and Coking properties of the coal blends. In this study, a fat coal was thermally dissolved, and the caking and Coking properties of the thermal dissolution soluble factions (TDSFs) from different solvents and temperatures were characterized. It was found that the caking properties of TDSFs were better than that of fat raw coal. The TDSFs obtained from non-polar solvents have a higher caking Property than those obtained from polar solvents at the same thermal dissolution (TD) temperature. During TD process, polar solvents can thermally dissolve more polyaromatic compounds into TDSF, thus increasing the softening temperature and decreasing the caking Property of the TDSF. For the same TD solvent, the TDSFs obtained from higher temperatures have a lower caking Property compared to those obtained from lower temperatures because of more aromatic components and oxygen functional groups entering them. Crucible Coking determinations were carried out to evaluate the Coking Property of the TDSFs. The result suggests that when 5% of TDSF and 5% of non-caking sub-bituminous coal were used instead of the same amount of fat coal and gas coal, respectively in the coal blends, the quality of the coke obtained could get to the level of the coke obtained from the standard coal blends (i.e. without TDSF and sub-bituminous coal). Therefore, the use of TDSF in coal blending for coke-making is one of the effective methods for opening the Coking coal resources.

Hengfu Shui - One of the best experts on this subject based on the ideXlab platform.

  • caking and Coking properties of the thermal dissolution soluble fraction of a fat coal
    Fuel Processing Technology, 2014
    Co-Authors: Hengfu Shui, Zhicai Wang, Tao Shui, Wenjuan Zhao, Chuanjun Shan, Shigang Kang
    Abstract:

    Abstract In the coal blending for coke-making, fat coal has a very important role for the caking and Coking properties of the coal blends. In this study, a fat coal was thermally dissolved, and the caking and Coking properties of the thermal dissolution soluble factions (TDSFs) from different solvents and temperatures were characterized. It was found that the caking properties of TDSFs were better than that of fat raw coal. The TDSFs obtained from non-polar solvents have a higher caking Property than those obtained from polar solvents at the same thermal dissolution (TD) temperature. During TD process, polar solvents can thermally dissolve more polyaromatic compounds into TDSF, thus increasing the softening temperature and decreasing the caking Property of the TDSF. For the same TD solvent, the TDSFs obtained from higher temperatures have a lower caking Property compared to those obtained from lower temperatures because of more aromatic components and oxygen functional groups entering them. Crucible Coking determinations were carried out to evaluate the Coking Property of the TDSFs. The result suggests that when 5% of TDSF and 5% of non-caking sub-bituminous coal were used instead of the same amount of fat coal and gas coal, respectively in the coal blends, the quality of the coke obtained could get to the level of the coke obtained from the standard coal blends (i.e. without TDSF and sub-bituminous coal). Therefore, the use of TDSF in coal blending for coke-making is one of the effective methods for opening the Coking coal resources.

Yitian Fang - One of the best experts on this subject based on the ideXlab platform.

  • insight into the effects of additive water on caking and Coking behaviors of coal blends with low rank coal
    Fuel, 2019
    Co-Authors: Zhirong Yang, Jiejie Huang, Shuangshuang Song, Zhiqing Wang, Yitian Fang
    Abstract:

    Abstract Additive water is usually needed to preserve 9–11% moisture content of blended coal in the stamp-charging Coking process, which in fact is unfavorable for Coking Property. An insight into the improvement of Coking Property of coal blends with much low-rank coal (long flame coal SFC, lignite HLH) by regulating additive water was proposed in terms of its effects on the metaplast fluidity and the particle agglomeration behavior. The results indicate that the cohesiveness of gas coals (GC) can be properly enhanced by adding water. The restrictions on the condensation of aromatic structures and the break-up of –CH2– structure and the development of the polyhydroxy groups in aromatic structures are favorable to increase the fluidity of metaplast after adding water, as demonstrated by the optical texture and FTIR analysis of the semicoke (450 °C). The great difference in the hydrophilic properties for various rank coals leads to the particle agglomeration of gas coal and fat coal (GC and FC), which makes them difficult to mix uniformly with SFC after adding water, thus reduces the Coking Property. A reasonable approach of adding water suggests that H2O and SFC should be well mixed prior to blending with caking coals, which can lead to a uniform particle distribution and a better Coking Property. This approach promotes the direct and efficient utilization of low-rank coal (especially lignite) by the blending Coking with no or less drying and dewatering processes.

Chen Gang - One of the best experts on this subject based on the ideXlab platform.

  • study and actualization of burning bituminous coal in lean coal fired boiler of the 300 mw unit
    Southern Power System Technology, 2009
    Co-Authors: Chen Gang
    Abstract:

    As the coal market changing, it is more and more popular for boiler to burn off-design coal, and how to combust bituminous coal safely and economically in the lean coal-fired boiler of 300 MW unit at the condition of not reconstructing the burning system and boiler body is worthy of study.This paper provides feasibility analysis in theory and test study in laboratory and power station on burning bituminous coal in lean coal-fired boiler of 300 MW unit with multi-function boat type burner and hot air feed pulverized coal system, resulting in a conclusion that only by setting a cold primary air bypass duct and adjusting combustion it is realized to combust bituminous coal of middle percentage volatile and slight Coking Property safely in the lean coal-fired boiler of 300 MW unit and more effectively than original lean coal or blended coal.The method has advantages of investing money less and yielding benefits quickly, and obvious effects of saving energy and reducing emission.

Wenjuan Zhao - One of the best experts on this subject based on the ideXlab platform.

  • caking and Coking properties of the thermal dissolution soluble fraction of a fat coal
    Fuel Processing Technology, 2014
    Co-Authors: Hengfu Shui, Zhicai Wang, Tao Shui, Wenjuan Zhao, Chuanjun Shan, Shigang Kang
    Abstract:

    Abstract In the coal blending for coke-making, fat coal has a very important role for the caking and Coking properties of the coal blends. In this study, a fat coal was thermally dissolved, and the caking and Coking properties of the thermal dissolution soluble factions (TDSFs) from different solvents and temperatures were characterized. It was found that the caking properties of TDSFs were better than that of fat raw coal. The TDSFs obtained from non-polar solvents have a higher caking Property than those obtained from polar solvents at the same thermal dissolution (TD) temperature. During TD process, polar solvents can thermally dissolve more polyaromatic compounds into TDSF, thus increasing the softening temperature and decreasing the caking Property of the TDSF. For the same TD solvent, the TDSFs obtained from higher temperatures have a lower caking Property compared to those obtained from lower temperatures because of more aromatic components and oxygen functional groups entering them. Crucible Coking determinations were carried out to evaluate the Coking Property of the TDSFs. The result suggests that when 5% of TDSF and 5% of non-caking sub-bituminous coal were used instead of the same amount of fat coal and gas coal, respectively in the coal blends, the quality of the coke obtained could get to the level of the coke obtained from the standard coal blends (i.e. without TDSF and sub-bituminous coal). Therefore, the use of TDSF in coal blending for coke-making is one of the effective methods for opening the Coking coal resources.