气固搅拌空气重介质流化床中细粒煤分层规律研究

发布时间：2018-05-14 00:25

本文选题：空气重介质流化床 + 流化特性　；参考：《煤炭科学技术》2016年09期

【摘要】：为了研究气固搅拌空气重介质流化床中细粒煤分层规律以及其分选粒度下限,对气固搅拌空气重介质流化床的流化特性进行了研究。结果表明,气固搅拌空气重介质流化床在转速为100 r/min时有较为稳定的流化特性;6~3 mm粒级的原煤灰分随着流化床床层高度的增加而减小,表现出良好的密度分层规律和分选特性。原煤分级分选结果表明:普通流化床对13~6 mm粒级有较为明显的分选效果,灰分离析标准差达到1.56;气固搅拌空气重介质流化床对13~6、6~5、5~4 mm三个粒级都有明显的分选效果,灰分离析标准差分别为1.74、1.36、1.35。气固搅拌空气重介质流化床分选细粒煤的下限介于4~3 mm,且对3~1 mm的细粒煤没有分选效果。
[Abstract]:The fluidization characteristics of gas-solid stirred air heavy medium fluidized bed (GASB) were studied in order to study the stratification of fine coal in gas-solid stirred air heavy medium fluidized bed and its lower limit of separation granularity. The results show that the fluidization characteristics of gas-solid agitated air heavy medium fluidized bed are more stable when the speed is 100 r/min. The ash content of raw coal with 6mm particle size decreases with the increase of bed height, showing good density stratification and separation characteristics. The results of classification and separation of raw coal show that the standard deviation of ash segregation is 1.56 in the ordinary fluidized bed for 136mm particles, and in the gas-solid agitated air heavy medium fluidized bed, the separation effect of the three grained grades is obvious. The standard deviation of ash segregation is 1.74 ~ 1.36 ~ 1.35 respectively. The lower limit of separating fine coal in gas-solid agitated air heavy medium fluidized bed is 4 ~ 3 mm, and it has no separation effect for 3 ~ 1 mm fine coal.
【作者单位】：中国矿业大学化工学院;
【分类号】：TD94

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