下吸罩结构参数对木粉尘控制模拟及正交优化  

Simulation and Orthogonal Optimization of Wood Dust Control by Structural Parameters of Downdraft Hood

作　　者：林大建[1] 张志丹 黄小路 LIN Da-jian;ZHANG Zhi-dan;HUANG Xiao-lu(School of Emergency Management and Safety Engineering,Jiangxi University of Science and Technology,Ganzhou 341000,China)

机构地区：[1]江西理工大学应急管理与安全工程学院,赣州341000

出　　处：《科学技术与工程》2023年第12期5358-5366,共9页Science Technology and Engineering

基　　金：江西省教育厅资助科研项目(GJJ150665)。

摘　　要：打磨车间产生的木粉尘具有粒径小、危害大、粉尘浓度超过国家卫生限值等特点。为探究某家具厂打磨车间木粉尘污染情况,及分析该打磨车间下吸罩的较优结构参数。采用数值模拟方法,以30μm粒径木粉尘为研究对象,对多打磨作业点进行单因素模拟,再通过正交试验及模拟验证得到较为合适的下吸罩结构参数。结果表明:在自然通风时,呼吸区域高度的粉尘浓度大于国家卫生限值,接近4.5 mg/m^(3);各单因素模拟情况下的最优工况分别为:三角形罩口、0.6 m罩口高度及通风量2600 m^(3)/h;通过正交试验及模拟验证得到下吸罩优化方案参数为:通风量2000 m^(3)/h、三角形罩口、罩口高度0.6 m。The wood dust generated in grinding workshops is featured by small particle size,great harm,and dust concentration over the national health limit.To research the wood dust pollution in the grinding workshop of a furniture factory,and analyze the optimal structural parameters of the downdraft hood in the grinding workshop,a numerical simulation method was adopted,taking wood dust with 30μm particle size as the research object,a single factor simulation of multiple grinding operation points was carried out,and then suitable structural parameters of the downdraft hood were obtained through the orthogonal test and simulation verification.The results show that during natural ventilation,the dust concentration at the height of the breathing area is greater than the national health limit,close to 4.5 mg/m 3.The optimal working conditions under each single factor simulation are:triangular hood,with hood height of 0.6 m and ventilation volume of 2600 m 3/h.The parameters of the optimization scheme of the downdraft hood are obtained through the orthogonal test and simulation verification as follows:the ventilation volume is 2000 m 3/h,the triangular hood and the hood height is 0.6 m.

关 键 词：下吸罩 木粉尘 数值模拟 优化方案 

分 类 号：X942[环境科学与工程—安全科学]