低填充比下混合滚筒粉体混合特性数值模拟

doi:10.16085/j.issn.1000-6613.2017.01.014

化工进展 ›› 2017, Vol. 36 ›› Issue (01): 107-113.DOI: 10.16085/j.issn.1000-6613.2017.01.014

低填充比下混合滚筒粉体混合特性数值模拟

张哲, 苏杨, 马宁, 陈松, 秦能, 刘晶

西安近代化学研究所, 氟氮化工资源高效开发与利用国家重点实验室, 陕西西安 710065

收稿日期:2016-05-12 修回日期:2016-08-29 出版日期:2017-01-05 发布日期:2017-01-05
通讯作者: 张哲(1989-),男,工程师,硕士,从事特种设备研究开发。E-mail:327307049@qq.com。
作者简介:张哲(1989-),男,工程师,硕士,从事特种设备研究开发。E-mail:327307049@qq.com。
基金资助:
国防科技工业基础产品创新计划火炸药科研重大专项。

Simulation of mixing characteristics of rotary drum with low packing ratio of powder

ZHANG Zhe, SU Yang, MA Ning, CHEN Song, QIN Neng, LIU Jing

State Key Laboratory of Fluorine & Nitrogen Chemicals, Xi'an Modern Chemistry Research Institute, Xi'an 710065, Shaanxi, China

Received:2016-05-12 Revised:2016-08-29 Online:2017-01-05 Published:2017-01-05

摘要/Abstract

摘要： 对于易燃易爆粉体的混合安全性，低填充比具有重要意义，目前尚未见混合滚筒在低填充比条件下混合特性的研究报道。本文采用气固三相流模型对两种粉体在混合滚筒中的混合过程进行建模。粉体与空气间相互作用系数采用Syamlal-O'Brien公式，粉体与粉体之间相互作用系数采用Syamlal-O'Brien-Symmetric公式。采用加权的组分配比分布方差对混合均匀性进行判断。计算结果表明混合滚筒在低填充比下具有较高的混合效率以及混合质量，并初步计算了不同填充比、转速、滚筒结构参数条件下的混合特性，对计算结果进行了分析。最后利用一个直径1000mm的混合滚筒，在低填充比条件下进行了实验，记录了混合过程中物料流过抄板的流态，对样品均匀性进行了化学分析。实验结果证明了仿真计算结果的准确性。低填充比下使用滚筒，有利于保证易燃易爆粉体混合工艺安全性，具有较好的应用前景。

关键词: 滚筒, 低填充比, 多相流, 混合, 数值模拟

Abstract: Mixing flammable and explosive powder at a low packing ratio has great significance for safety mixing. Research on mixing characteristics of rotary drum at a low packing ratio has not been reported yet. A gas-solid three-phase flow model was built to simulate the mixing progress of two kinds of powder in rotary drum at low packing ratio. Syamlal-O'Brien formula was used to compute the force between the particle and the air and Syamlal-O'Brien-Symmetric formula for the force between particles. The weighted components proportion variance was used to evaluate the uniformity of the mixture. Calculation results showed that the rotary drum at a low packing ratio exhibits high efficiency mixing characteristics and excellent mixing uniformity. Changing powder packing ratio,rotating speeds,numbers and length of the fins,several preliminary simulation were investigated and calculation results was analyzed. Finally,experiment of a 1000mm-diameter rotary drum at a low packing ratio was carried out. The distributions of the particle when they flowed past the fins were recorded and the samples were analyzed by chemical. The accuracy of the calculation results was verified by the experiment data,proving the accuracy of the gas-solid three-phase flow model. Rotary drum at a low packing ratio is safe for flammable and explosive powder and has a good prospect in industrial production.

Key words: rotary drum, low packing ratio, multiphase flow, mixing, numerical simulation

中图分类号:

TQ021.5

张哲, 苏杨, 马宁, 陈松, 秦能, 刘晶. 低填充比下混合滚筒粉体混合特性数值模拟[J]. 化工进展, 2017, 36(01): 107-113.

ZHANG Zhe, SU Yang, MA Ning, CHEN Song, QIN Neng, LIU Jing. Simulation of mixing characteristics of rotary drum with low packing ratio of powder[J]. Chemical Industry and Engineering Progree, 2017, 36(01): 107-113.

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低填充比下混合滚筒粉体混合特性数值模拟

Simulation of mixing characteristics of rotary drum with low packing ratio of powder

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