陶瓷干法造粒机造粒立柱个数对混料效果的数值模拟
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摘要
针对陶瓷干法造粒机造粒立柱个数对混料效果的影响,结合实验与数值模拟对比分析混料过程造粒立柱个数对混料堆积度的影响。基于CFD方法建立造粒立柱的数学物理模型,模拟混料过程中造粒立柱数目变化情况,并实验测得颗粒堆积度随造粒立柱个数变化的情况。仿真结果与实验数据对比表明:当造粒立柱个数为6,仿真结果显示颗粒堆积度占整体颗粒体积的20%-23%,实验测得颗粒堆积度占整体颗粒体积的19%-24%;当造粒立柱个数为8,仿真结果显示颗粒堆积度占整体颗粒体积的5%-7%,实验测得颗粒堆积度占整体颗粒体积的6%-9%;当造粒立柱个数为10,仿真结果显示颗粒堆积度占整体颗粒体积的11%-14%,实验测得颗粒堆积度占整体颗粒体积的13%-15%。仿真结果与实验数据对比分析说明:当造粒机造粒立柱个数为8时,混料效果最好。
In order to investigate the mixing effect of granulation columns, the influence of granulation column numbers on the accumulation degree was analyzed by experiment and numerical simulation. The mathematical and physical models of the granulation columns were established based on CFD to simulate the change of the granulation column numbers in the mixing process. The accumulation degree that varied with the granulation column number was measured. The simulation results and experimental data showed: when the number of granulation columns were 6, the simulated accumulation volume accounted for 20-23% of the total of all particles while the tested made up 19-24%; when the number of granulation columns were 8, the simulated accumulation volume accounted for 5%-7% of the total of all particles while the tested made up 6-9%; when the number of granulation columns were 10, the simulated accumulation volume accounted for 11-14% of the total of all particles while the tested made up 13-15%; The comparison between the simulation results and the experimental data indicated that when the number of granulation columns was 8, the mixing effect was the best.
In order to investigate the mixing effect of granulation columns, the influence of granulation column numbers on the accumulation degree was analyzed by experiment and numerical simulation. The mathematical and physical models of the granulation columns were established based on CFD to simulate the change of the granulation column numbers in the mixing process. The accumulation degree that varied with the granulation column number was measured. The simulation results and experimental data showed: when the number of granulation columns were 6, the simulated accumulation volume accounted for 20-23% of the total of all particles while the tested made up 19-24%; when the number of granulation columns were 8, the simulated accumulation volume accounted for 5%-7% of the total of all particles while the tested made up 6-9%; when the number of granulation columns were 10, the simulated accumulation volume accounted for 11-14% of the total of all particles while the tested made up 13-15%; The comparison between the simulation results and the experimental data indicated that when the number of granulation columns was 8, the mixing effect was the best.
引文
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[2] SHU Z, ZHOU J, WANG Y. A novel approach of preparing press-powders for cleaner production of ceramic tiles[J]. Journal of Cleaner Production, 2010, 18(10-11):1045-1051.
[3]吴南星,廖达海,占甜甜.陶瓷干法制粉机搅拌轴偏心距对颗粒分散性的影响[J].硅酸盐通报, 2014,(12):3300-3303.WU N X, LIAO D H, ZHAN T T. Bull Chin Ceram Soc, 2014,(12):3300-3303.
[4]黄剑锋,张博烨,汪庆刚,等.一种建筑陶瓷坯料干法造粒装置及其方法:CN103566818A[P]. 2014.
[5]王斌,郑伍魁,李辉,等.我国陶瓷墙地砖制粉工艺的进展[J].硅酸盐通报, 2015,(05):1312-1319.WANG B, ZHENG W K, LI H, et al. Bull Chin Ceram Soc, 2015,(05):1312-1319.
[6]杨嵩,郑洲顺,曹稳,等.Ⅰ型拉伸试样金属注射成形多相流动的三维数值模拟[J].数学理论与应用, 2012,(1):37-42.YANG S, ZHENG Z S, CAO W, et al. Mathematical Theory and Application, 2012,(1):37-42.
[7]周国忠,王英琛,施力田.用CFD研究搅拌槽内的混合过程[J].化工学报, 2003,(07):886-890.ZHOU G Z, WANG Y C, SHI L T. Journal of Chemical Industry,2003,(07):886-890.
[8]梁瑛娜,高殿荣.双层直斜叶及其组合桨搅拌槽三维流场数值模拟[J].机械工程学报, 2008, 44(11):290-297.LIANG Y N, GAO D R. Journal of Mechanical Engineering,2008, 44(11):290-297.
[9] SINCLAIR J L. Multiphase flow and fluidization:Continuum and kinetic theory descriptions:By Dimitri Gidaspow, published by Academic Press, San Diego, 1994, pp. 467,$69.50, ISBN0-12-282470-9[J]. Powder Technology, 1995, 83(95):287.
[10] WUCL,NANDAKUMARK,BERROUKAS,etal.Enforcing mass conservation in DPM-CFD models of dense particulate flows[J]. Chemical Engineering Journal, 2011,174(174):475-481.
[11] HIRT B C, NICHOLS B. Volume of fluid(VOF)method for the dynamics of free boundaries[J]. Journal of Computational Physics, 2010, 39(81):201-225.
[12] PFLEGER D, GOMES S, GILBERT N, et al. Hydrodynamic simulations of laboratory scale bubble columns fundamental studies of the Eulerian-Eulerian modeling approach[J].Chemical Engineering Science, 1999, 54(21):5091-5099.
[13] WU Z, ZONG Z, SUN L. A Mie-Grüneisen mixture Eulerian model for underwater explosion[J]. Engineering Computations,2014, 31(3):425-452(28).
[14] HIGUERA F J. Eulerian model of a dilute spray of charged droplets[J]. Journal of Aerosol Science, 2012, 48(4):34-45.
[15]吴南星,廖达海,肖志锋.陶瓷干法造粒机的数值模拟及其优化设计[J].陶瓷学报, 2014, 35(01):82-87.WU N X, LIAO D H, XIAO Z F. Journal of Ceramics, 2014,35(01):82-87.
[16]赵斌娟,袁寿其,刘厚林,等.基于Mixture多相流模型计算双流道泵全流道内固液两相湍流[J].农业工程学报, 2008,24(1):7-12.ZHAO B J, YUAN S Q, LIU H L, et al. Journal of Agricultural Engineering, 2008, 24(1):7-12.
[17] CASTRO J A D, SAZAKI Y, YAGI J I. Three dimensional mathematical model of the iron ore sintering process based on multiphase theory[J]. Materials Research, 2012, 15(15):848-858.