基于CFD的丝网印刷工位毒物扩散模拟研究

发布时间：2018-07-02 08:10

  本文选题：丝网印刷 + CFD模拟　； 参考：《首都经济贸易大学》2016年硕士论文

【摘要】：近几年来,随着计算机技术的发展,CFD(即计算流体力学)技术得到广泛的应用,用CFD技术模拟预测室内的气流组织以及优化室内通风设计方案成为可能。目前,我国对丝网印刷车间VOC浓度分布情况的CFD模拟研究比较少。因此,本研究立足于某企业丝网印刷工位的毒物扩散的实际情况,利用FLUENT公司推出的专业软件FLUENT14.5对该企业丝网印刷工位的毒物的扩散情况进行模拟,为下一步设置车间内通风口位置提供参考；通过对比不同通风量对有机挥发物浓度场的影响,找出更为有效的毒物控制对策措施。希望研究结果能对实际印刷车间控制污染物扩散的决策具有指导意义。本文在对丝网印刷行业的现状以及丝网印刷技术进行简单介绍以及CFD软件的计算原理和方法进行了全面阐释的基础之上,结合某企业丝网印刷车间实际情况,对该丝网印刷车间内的VOC的浓度场进行了CFD模拟。本文的具体研究内容如下：(1)对丝网印刷车间进行了数据采集,包括丝网印刷车间、门窗、印刷机的位置、尺寸,采样点的位置数据,释放源的VOC浓度等数据,以及作业人员的工时记录等资料。(2)利用Gambit建立了该丝网印刷车间的空间几何模型,将记录参数导入FLUENT软件,进行数值模拟,得出丝网印刷工位在该车间正常工作工况下的VOC浓度场模拟结果。(3)根据丝网印刷车间VOC浓度场的模拟结果,在该车间设置通风装置,在该车间正常工作情况下,改变丝网印刷车间内送风量和排风量,利用CFD技本模拟不同送风量和排风量条件下丝网印刷车间内VOC的浓度分布状况,以期找出较为经济合理的排风量和送风量,使得丝网印刷工位人体呼吸带水平断面上VOC的浓度值降为标准要求以内,为最优送风量和排风量组合。
[Abstract]:In recent years, with the development of computer technology, CFD (computational fluid dynamics) technology has been widely used, it is possible to use CFD technology to simulate and predict indoor air distribution and optimize indoor ventilation design. At present, the CFD simulation of VOC concentration distribution in screen printing workshop in China is less. Therefore, this study is based on the actual situation of poison diffusion of screen printing station in an enterprise, and simulates the spread of poison in screen printing station of the enterprise by using fluent's professional software fluent 14.5. Through comparing the effect of different ventilation amount on the concentration field of organic volatile, the more effective measures of poison control were found out. It is hoped that the research results will be helpful to the decision of controlling pollutant diffusion in printing workshop. Based on the brief introduction of screen printing industry and screen printing technology as well as the calculation principle and method of CFD software, this paper combines the actual situation of screen printing workshop in a certain enterprise. The concentration field of VOC in the screen printing workshop was simulated by CFD. The specific contents of this paper are as follows: (1) the data collection of screen printing workshop, including screen printing shop, doors and windows, printing machine position, size, sampling point position data, release source VOC concentration data, etc. (2) the spatial geometric model of the screen printing workshop is established by Gambit, and the recording parameters are imported into fluent software, and the numerical simulation is carried out. The simulation results of VOC concentration field of screen printing station under normal working conditions are obtained. (3) according to the simulation results of VOC concentration field in screen printing workshop, ventilation device is installed in the workshop, and under the normal working condition of the workshop, The distribution of VOC concentration in screen printing workshop was simulated by CFD technique in order to find out the more economical and reasonable air supply and air supply. The concentration of VOC on the horizontal section of breath belt of human body in screen printing station is reduced to the standard requirement, which is the optimal combination of air supply and exhaust air.
【学位授予单位】：首都经济贸易大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TS871.1;R135
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本文编号：2089481