摘要
目的:基于计算流体动力学(computational fluid dynamics,CFD)方法,分析生物安全型高效排风过滤装置的消毒接口位置、接口管径和消毒剂浓度对装置原位消毒效果的影响。方法:首先,基于ANSYS DesignModeler搭建4个消毒接口位于箱体侧端(管径分别为70、100、150、260 mm)和1个消毒接口位于箱体上端(管径为260 mm)的高效排风过滤装置模型;其次,采用标准k-ε湍流模型模拟高效排风过滤装置内部的速度场、浓度场,分析装置内涡流位置及装置结构对消毒效果的影响,并确定装置的最优结构;最后,选择H_(2)O_(2)溶液为消毒剂(溶液浓度为0.45、0.35和0.30 mol/L),分析最优结构下消毒剂浓度对消毒效果的影响。结果:经仿真模拟得出,在高效排风过滤装置的过滤器压紧结构与过滤器之间的空腔位置存在涡流。当消毒接口位于箱体侧端时,消毒效果优于消毒接口位于箱体上端;消毒接口的管径对消毒效果同样有影响,当管径为100 mm时,高效排风过滤装置内消毒剂浓度较高。最终确定消毒接口置于箱体侧端、管径为100 mm为最优结构。对高效排风过滤装置进行原位消毒时,在不腐蚀破坏装置的情况下,H_(2)O_(2)浓度的提高有利于改善消毒效果。结论:该研究揭示了高效排风过滤装置内部流场特性及原位消毒效果的影响因素,为装置优化设计提供了理论依据。
Objective To explore the effects of the disinfection port position and diameter and disinfectant concentration on the in-situ decontamination of the flow field-based biosafety high efficiency particulate air filter device with the computational fluid dynamics(CFD)method.Methods ANSYS DesignModeler was used to construct five models for the high efficiency particulate air filter device with the disinfection port at the side end in four ones and upper end in the remained one model,with the diameter being 70,100,150,260 and 260 mm respectively;secondly,a standard k-εturbulence model was applied to simulating the velocity field and concentration field inside the high efficiency particulate air filter device,so as to analyze the influence of the vortex position inside the device and the structure of the device on the disinfection effect and to determine the optimal structure of the device;finally,H_(2)O_(2)with the concentration of 0.45,0.35 or 0.30 mol/L was selected as the disinectant to investigate the effect of the disinfectant concentration on the disinfection under the optimal device structure.Results Simulation showed that there were vortexes existed the cavity between the filter compression structure and the filter of the high efficiency particulate air filter device.The disinfection effect in case of the disinfection port at the side end was higher than that in case of the disinfection port at the upper end;the diameter of the disinfection port had influences on the disinfection effect,and high-concentration disinfectant was found in the device when the diameter was 100 mm.The optimal structure with the disinfection port at the side end and the diameter of 100 mm was determined for the high efficiency particulate air filter device.An increase in H_(2)O_(2)concentration was beneficial to improve disinfection without corroding and damaging the device when the in-situ decontamination of the flow field-based biosafety high efficiency particulate air filter device was carried out.Conclusion The characteristics of the internal flow field of the flow field-based biosafety high efficiency particulate air filter device and the influencing factors of the in-situ disinfection effect are revealed,and theoretical references are provided for the optimal design of the device.
作者
李艳菊
崔冀新
鲍昀利
杨雪龙
LI Yan-ju;CUI Ji-xin;BAO Yun-li;YANG Xue-long(School of Energy and Safety Engineering,Tianjin Chengjian University,Tianjin 300384,China;Tianjin Changte Purification Technology Co.,Ltd.,Tianjin 300409,China)
出处
《医疗卫生装备》
2025年第9期22-27,共6页
Chinese Medical Equipment Journal
基金
天津市技术创新引导专项(21YDTPJC00560)。
关键词
生物安全
高效排风过滤装置
计算流体动力学
原位消毒
生物安全防护设备
biosafety
high efficiency particulate air filter device
computational fluid dynamics
in-situ decontamination
biosafety protective equipment
