动物实验室通风熏蒸过程的模拟研究

Simulation Study of Ventilation Fumigation Process in Animal Laboratory

动物实验室在启用前需要进行熏蒸彻底灭菌消毒以保证室内洁净.通风系统熏蒸是在送风管与排风管之间加入熏蒸气体发生设备,通过室内空气循环来促进熏蒸气体扩散.为了研究通风系统熏蒸过程气体浓度分布的影响因素,用icem建模以及fluent软件对该过程的不同的时间、换气次数、送风形式及温度分布状态下多工况的气流组织进行瞬态模拟,预测并分析熏蒸气体浓度和湿度的分布规律.得出使熏蒸气体快速达到灭菌程度的最小换气次数随时间延长而减小,改变送风形式可以减少实验台附近的涡流,室内温度随高度降低有利于熏蒸气体快速扩散的结论,以便对熏蒸灭菌进行更有效的控制,对于指导动物实验的安全进行有重要意义.

The animal laboratory needs to be fumigated and disinfected thoroughly before starting using in order to ensure the cleanness of the room.Ventilation system fumigation provides the fumigation gas generating equipment between air supply pipe and air discharge pipe to promote the fumigation gas diffusion through indoor air circulation.In order to study the influencing factors of gas concentration distribution in the fumigation process of the ventilation system,icem modeling and fluent software were used to carry out the transient simulation of air distribution in different conditions under different times,ventilation times,air supply modes and temperature distribution conditions,and to predict and analyze the distribution law of fumigation gas concentration and humidity.It is concluded that the minimum ventilation rate to quickly reach the sterilization degree decreases with time,the change of the air supply mode can reduce the vortex near the test bench,and the indoor temperature decreases with the height to facilitate the rapid diffusion of fumigation gas,so as to control the fumigation more effectively,which is of great significance to guide the safety of animal experiment.