首页|卧式沉降离心机参数对固体回收率的影响研究

卧式沉降离心机参数对固体回收率的影响研究

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  • 国家科技期刊平台
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煤炭领域细粒煤泥处理属于行业煤泥处理的主要难题，卧式沉降离心机在煤炭领域上具有广泛的应用，其适用于各种固液分离，尤其应用于细粒级煤炭回收以及降低煤炭水分。为有效降低部分细煤泥处理费用，增加回收后细煤泥的增值利用，以河北、山西、内蒙古地区3个洗煤厂细煤泥为试验对象并开展离心机参数变量对固体回收率的试验研究，重点探究转鼓转速、转速差、堰高、入料质量分数和粒度组成对回收率的影响规律。试验结果表明:转速增加将提高回收率、降低分级粒径，极限转速后变化不显著;随着速度差的增加则回收率逐步增加，较高的入料质量分数下则回收率变化较小;一定范围内增加堰高有利于回收，需调整堰高至合理区间;随着入料质量分数上升则回收率逐步上升，其质量分数超过40％，回收率上升趋势变化较小;回收率随物料粒度变大而增加，而分级粒径变化很小。
Research on the influence of parameters of horizontal settling centrifuge on solid recovery rate
The treatment of fine-grained coal slurry in the coal industry is the main challenge in coal slurry treatment.Horizontal settling centrifuges have a wide range of applications in the coal field,suitable for various solid-liquid sep-arations,especially for the recovery of fine-grained coal and the reduction of moisture.In order to effectively reduce the processing cost of some fine coal slurry and increase the value-added utilization of recovered fine coal slurry,fine coal slurry from three coal washing plants in Hebei,Shanxi,and Inner Mongolia was taken as the experimental ob-ject,and experimental research was conducted on the effect of centrifuge parameter variables on solid recovery rate,especially the influence of drum speed,speed difference,weir height,feed concentration,and particle size compo-sition on recovery rate.The experimental results show that increasing the rotational speed will improve the recovery rate,reduce the particle size of the classification,and the change after the maximum rotational speed is not signifi-cant;The increase in speed difference gradually increases the recovery rate,and the change in recovery rate is relative-ly small at higher feed concentrations;Increasing the weir height within a certain range is beneficial for recycling,and it is necessary to adjust the weir height to a reasonable range;As the feed concentration increases,the recovery rate gradually increases.When the concentration exceeds 40％,the trend of recovery rate increase is relatively small;The recovery rate increases with the increase of material particle size,while the grading particle size changes very little.

horizontal settling centrifugesolid recovery rateparameters of centrifugesolid-liquid separation experimentdrum speedparticle size composition

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中煤科工集团唐山研究院有限公司,河北 唐山 063012

河北省煤炭洗选工程技术研究中心,河北 唐山 063012

卧式沉降离心机 固体回收率 离心机参数 固液分离试验 转鼓转速 粒度组成

中国煤炭科工集团创新基金资助项目中国煤炭科工集团创新基金资助项目

BJHY-BJ-TS2021-182018-TD-QN042

2024

10.3969/j.issn.1007-7677.2024.04.013

煤质技术
煤炭科学研究总院

煤质技术

影响因子：0.393
ISSN：1007-7677
年,卷(期)：2024.39(4)