除尘风机用折流板除雾器的数值模拟及应用

发布时间：2018-02-04 18:35

本文关键词： 折流板除雾器数值模拟矿山除尘湿式除尘风机除尘效率　出处：《煤矿安全》2015年11期 　论文类型：期刊论文

【摘要】：针对目前对折流板除雾器的风流场和雾滴颗粒场描述规律不清晰,采用SST k-ω湍流模型并运用气液两相流理论,建立相关数学模型,对折流板除雾器三维空间风流-雾滴运移规律进行了数值模拟,模拟结果表明,除雾器的除雾效果明显,除雾率高达94.36%。结合现有湿式除尘风机出风口逃逸粉尘以雾滴包裹形式存在的特点,提出将折流板除雾器安装在湿式除尘风机上,用以除雾降尘,并进行了现场应用,结果表明,安装折流板除雾器的湿式除尘风机的全尘和呼尘平均除尘率由未安装时的84.3%和80.4%提高到96.6%和91.3%。由此表明折流板除雾器应用于湿式除尘风机的除尘效果良好,具有较好的推广前景。
[Abstract]:In view of the unclear description of wind flow field and droplet field of baffle plate demister, SST k- 蠅 turbulence model and gas-liquid two-phase flow theory are used to establish the relevant mathematical model. Numerical simulation was carried out on the three-dimension air-droplet migration law of baffle plate mist eliminator. The simulation results show that the fogging effect of the defoiler is obvious. The fog removal rate is as high as 94.36. Combined with the existing characteristics that the dust escaping from the outlet of the wet dust collector exists in the form of droplets, it is put forward that the baffle plate fogger can be installed on the wet dust collector for the purpose of defogging and dedusting. The field application shows that. The average dust removal rate of wet dust collector installed with baffle plate demister increased from 84.3% and 80.4% without installation to 96.6% and 91.3 percent, indicating the application of baffle plate demister. The dust removal effect of wet dust removal fan is good. It has a good prospect of popularization.
【作者单位】：山东科技大学矿业与安全工程学院;山东科技大学省部共建矿山灾害预防控制国家重点实验室培育基地;
【基金】：国家自然科学基金重点资助项目(U1261205);国家自然科学基金资助项目(51474139);国家自然科学基金青年基金资助项目(51204103,51404147)
【分类号】：TD714.4
【正文快照】： 现阶段矿山采掘面采取的主要防尘措施有煤体预注水防尘、喷雾降尘、除尘风机抽尘、通风排尘和密闭控尘5类[1-2]。除尘风机抽尘是解决煤矿采掘工作面粉尘污染问题最为有效的技术途径之一,目前被广泛应用,然而其除尘效果仍不能满足现场生产的需要,同时会产生大量的雾气,降低了矿

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