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昭通褐煤气力输送临界水分含量研究

DOI: 10.13334/j.0258-8013.pcsee.2014.11.002, PP. 1725-1734

Keywords: 气力输送,临界水分含量,昭通褐煤,水分赋存,形态

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Abstract:

研究昭通褐煤水分含量对其气力输送的影响,获得了其输送临界水分含量,并从煤粉流动性出发,对临界水分进行了初步解释,得到了初步判别标准。进一步从褐煤水分赋存形态出发,对临界水分问题进行了探讨。结果表明:昭通褐煤全水分约29%时,输送表观气速出现大幅度增大,全水分约30%时无法正常输送,判断其输送临界水分为29%~30%。煤粉流动性测量可为临界水分判别提供初步参考标准。在临界水分附近,煤粉流动性发生区域转变,流动性变差。粒间水是影响煤粉流动和输送的主要水分因素,粒内水对输送的影响很小。虽然褐煤全水分较高,但大量水分以粒内水形式存在,粒间水含量较少。昭通褐煤输送临界水分附近,粒间水含率约为6%,粒间水占粒间空隙体积的比率约为7%。

References

[1]  周永刚, 李培, 杨建国, 等.褐煤中不同水分析出的能耗研究[J].中国电机工程学报, 2011, 31(增刊):114-118. Zhou Yonggang, Li Pei, Yang Jianguo, et al.Research on energy consumption for different moisture evaporation of lignite[J].Proceedings of the CSEE, 2011, 31(S1):114-118(in Chinese).
[2]  谢晓旭, 沈湘林, 汤雪美, 等.煤粉流动特性若干影响因素的研究[J].煤炭学报, 2008, 33(1):85-88. Xie Xiaoxu, Shen Xianglin, Tang Xuemei, et al.Study on some factors impacting flowability of pulverized coal[J].Journal of China Coal Society, 2008, 33(1):85-88(in Chinese).
[3]  王川红, 郭晓镭, 龚欣, 等.粒度、湿含量对神府烟煤煤粉流动性参数的影响[J].华东理工大学学报:自然科学版, 2008, 34(3):377-382, 456. Wang Chuanhong, Guo Xiaolei, Gong Xin, et al.Effects of particle size and moisture content of Shenfu soft coal powder on its fluidity parameters[J].Journal of East China University of Science and Technology:Natural Science Edition, 2008, 34(3):377-382, 456(in Chinese).
[4]  Liang Cai, Zhao Changsui, Chen Xiaoping, et al.Flow characteristics and Shannon entropy analysis of dense-phase pneumatic conveying of pulverized coal with variable moisture content at high pressure[J].Chemical Engineering and Technology, 2007, 30(7):926-931.
[5]  许盼, 陈晓平, 梁财, 等.不同外水含量下煤粉高压密相输送试验研究[J].煤炭学报, 2010, 35(8):1359-1363. Xu Pan, Chen Xiaoping, Liang Cai, et al.Study on dense-phase conveying experiments of pulverized coal with various external moisture contents at high pressure[J].Journal of China Coal Society, 2010, 35(8):1359-1363(in Chinese).
[6]  Lu Haifeng, Guo Xiaolei, Gong xin, et al.Study of the flowability of pulverized coals[J].Energy Fuels, 2009, 23(11):5529-5535.
[7]  Geldart D, Abdullah E C, Verlinden A.Characterisation of dry powders[J].Powder Technology, 2009, 190(1/2):70-74.
[8]  李英华.谈谈煤中的各种水分[J].煤质技术, 2000, (5):10-12. Li Yinghua.Talk about a variety of moisture in the coal[J].Coal Quality Technology, 2000, (5):10-12(in Chinese).
[9]  Koyo Norinaga, Haruo Kumagai, Jun-ichiro Hayashi, et al.Classification of water sorbed in coal on the basis of congelation characteristics[J].Energy & Fuels, 1998, 12(3):574-579.
[10]  Norinaga K, Hayashi J I, Kudo N, et al.Evaluation of effect of predrying on the porous structure of water-swollen coal based on the freezing property of pore condensed water[J].Energy & Fuels, 1999, 13(5):1058-1066.
[11]  Allardice D J, Clemow L M, Favas G., et al.The characterisation of different forms of water in low rank coals and some hydrothermally dried products[J].Fuel, 2003, 82(6):661-667.
[12]  Deevi S C, Suuberg E M.Physical changes accompanying drying of western US lignites[J].Fuel, 1987, 66(4):454-460.
[13]  肖宝清, 周小玲.煤的孔隙特性与煤中水分关系的研究[J].矿冶, 1995, 4(l):90-93, 104. Xiao Baoqing, Zhou Xiaoling.Study on relationship of porous characters of coal and moisture in coal[J].Mining & Metallurgy, 1995, 4(1):90-93(in Chinese).
[14]  Wang H H.Kinetic analysis of dehydration of a bituminous coal using the TGA technique[J].Energy & Fuels, 2007, 21(6):3070-3075.
[15]  虞育杰.褐煤水热脱水提质制备高浓度水煤浆的基础研究[D].杭州:浙江大学, 2013. Yu Yujie.Fundamental research of upgrading brown coal by hydrothermal dewatering to prepare coal water slurry with high solid concentration[D].Hangzhou:Zhejiang University, 2013(in Chinese).
[16]  Li C Z.Some recent advances in the understanding of the pyrolysis and gasification behaviour of Victorian brown coal[J].Fuel, 2007, 86(12-13):1664-1683.
[17]  胡荣泽.颗粒测试基础知识100问[M].北京:中国建材工业出版社, 2011:34. Hu Rongze.100 questions of basic knowledge of particle test[M].Beijing:China Building Materials Industry Press, 2011:34(in Chinese).
[18]  Unsworth J F, Fowler C S, Jones L F.Moisture in coal:2.Maceral effects on pore structure[J].Fuel, 1989, 68(1):18-26.
[19]  Jones J C, Hewitt R G.Innes R A.Swelling of a German brown coal in acetone-water and methanol-water mixtures[J].Fuel, 1997, 76(7):575-577.
[20]  Kaji R, Muranaka Y, Otsuka K, et al.Water absorption by coals:effects of pore structure and surface oxygen[J].Fuel, 1986, 65(2):288-291.
[21]  谢可昌.煤的结构与反应性[M].北京:科学出版社, 2002:43-45. Xie Kechang.Coal structure and its reactivity[M].Beijing:Science Press, 2002:43-45(in Chinese).
[22]  李培.蒙东褐煤热压脱水机理与经济性研究[D]:杭州:浙江大学, 2011. Li Pei.Mechanism and economy research on thermal- pressure dewatering for east of Inner-Mongolia lignite[D].Hangzhou:Zhejiang University, 2011(in Chinese).
[23]  赵卫东, 刘建忠, 周俊虎, 等.褐煤等温脱水热重分析[J].中国电机工程学报, 2009, 29(14):74-79. Zhao Weidong, Liu Jiangzhong, Zhou Junhu, et al.Investigation on the isothermal dewatering of brown coal by thermobalance[J].Proceedings of the CSEE, 2009, 29(14):74-79(in Chinese).
[24]  Abou-Chakra H.Microstructural blending of coal to enhance flowability[J].Powder Technology, 2000, 1113):200- 209.
[25]  贺春辉, 沈湘林, 胥宇鹏, 等.CO2/N2作输送载气对煤粉高压密相气力输送特性的影响[J].中国电机工程学报, 2012, 32(29):38-44. He Chunhui, Shen Xianglin, Xu Yupeng, et al.Influences of CO2/N2 as carrier gas on dense phase pneumatic conveying of pulverized coal at high pressure[J].Proceedings of the CSEE, 2012, 32(29):38-44(in Chinese).
[26]  程克勤.粉粒状物料性能与其气力输送特性(待续)[J].硫磷设计与粉体工程, 2004, (6):13-25. Cheng Keqin.Performance of powder and granular material and their pneumatic conveying characteristics (to be continued)[J].Sulphur Phosphorus & Bulk Materials Handling Related Engineering, 2004, (6):13-25(in Chinese).
[27]  Geldart D, Abdullah E C, Hassanpour A, et al.Characterization of powder flowability using measurement of angle of repose[J].China Particuology, 2006, 4(3-4):104-107.

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