| 郗元， 姜文文， 代岩， 王国际， 闫志刚， 任福良， 牛凤娟.基于CFD的锥形散射器强化清灰特性数值模拟及优化[J].轻工机械,2021,39(1):98-103 |
| 基于CFD的锥形散射器强化清灰特性数值模拟及优化 |
| Numerical Simulation and Optimal of Conical Diffuser for Ash Removal Characteristics Based on CFD |
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| DOI：10.3969/j.issn.1005 2895.2021.01.019 |
| 中文关键词: 除尘器 脉冲清灰 锥形散射器 计算流体力学 正交试验 |
| 英文关键词:dust collector pulse jet cleaning conical diffuser CFD(computational fluid dynamics) orthogonal experiment |
| 基金项目:营口市企业·博士双创计划；中国博士后科学基金（2020M672084）；中国博士后科学基金（2018M631167）；国家自然科学基金（21706023）；辽宁省化学助剂合成与分离省市共建重点实验室开放课题（ZJKF2005）；辽宁省化学助剂合成与分离省市共建重点实验室开放课题（ZJKF2002）。 |
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| 中文摘要: |
| 针对外滤式滤筒除尘器作业时，尘粒附着在滤料表面，导致过滤效率低、系统阻力高等问题，课题组提出加装锥形散射器，辅助提升压缩气体喷吹压力，干扰流场实现清灰；并采用计算流体力学数值方法对除尘器清灰过程的流场进行模拟。研究结果表明：无散射器的喷吹清灰过程中，滤筒上、中、下的侧壁正压峰值随着喷吹距离的变化，无明显规律呈现；加装锥形散射器后，3个测点位置的侧壁正压峰值呈现出规律变化，随着喷吹距离增加，压力先提升后降低。对散射器顶点距入口距离、底面直径和高度3个因素进行了优化设计，得出最佳结构参数为：散射器顶点距入口10 mm，散射器底面直径60 mm，散射器高度40 mm。 |
| 英文摘要: |
| In order to solve the problems of that the dust particles sticking sticks to the surface of filter material when the dust collector is working, which result in reducing the low filtration efficiency and high increasing system resistance, a conical diffuser was proposed to help increase the injection pressure of compressed gas and interfere with the cleaning flow field for ash removal.The flow field of the dust removal process of the dust collector was numerically simulated. It was found that in the process of pulse jet cleaning without diffuser,the positive pressure peaks on the upper, the middle and the lower side walls of the filter cartridge showed no obvious regularity with the change of the blowing distance. With the addition of the conical diffuser, the positive pressure peaks on the three test positions showed regular changes.The pressure increased first and then decreased with the increase of the blowing distance. The distance between the diffuser′s vertices and the inlet, the diameter of the bottom surface and the height of the diffuser were optimized, and the optimal structural parameters were obtained as follows: the vertex of the diffuser is 10 mm from the inlet,the diameter of the bottom surface of the diffuser is 60 mm and the height of the diffuser is 40 mm. |
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