论文部分内容阅读
目的通过对炼油装置工作场所采用计算流体动力学(CFD)技术进行苯扩散模拟,探讨FLUENT软件在建设项目职业病危害评价中的应用,实现跑冒滴漏的浓度场分布的计算机模拟,从而提高评价技术水平。方法以某石油化工原油炼制的常减压装置为对象,对原油炼制工艺进行工程分析及职业暴露调查,采用FLUENT软件进行有害物质苯的扩散模拟。结果在有风气象条件下,当轻石脑油采样口发生少量泄漏时,可对下风向装置区造成较大的污染;上风向污染较小,在风力作用下,污染区域相对较小,没有无风的影响范围大;在无风状态下采样泄漏对装置区造成的影响更为严重,其影响范围更大,但是对外操室的影响不如有风时严重。结论采用基于CFD方法的FLU-ENT软件可以实现在巡检、采样、跑冒滴漏等复杂条件下的职业有害物质暴露评估及定量分析,并实现职业暴露评估的可视化。
The purpose of this paper is to simulate the benzene diffusion in the workplace of the refinery using Computational Fluid Dynamics (CFD) technology, to explore the application of FLUENT software in the evaluation of occupational hazards in construction projects and to realize the computer simulation of concentration field distribution of drip and drip, so as to improve the evaluation technology Level. Methods The atmospheric and vacuum distillation unit of a petrochemical crude oil refinery was used as an object to carry out engineering analysis and occupational exposure investigation on crude oil refining process. FLUENT software was used to simulate the diffusion of benzene. Results In windy weather conditions, when there was a small amount of leakage from the light naphtha sampling port, it could cause more pollution to the downwind installation area; the pollution in the upwind direction was less and the pollution area was relatively smaller under wind force. There was no The influence range of no wind is large. In the absence of wind, the influence of sampling leakage on the installation area is more serious and the impact scope is greater, but the impact on the external operation room is not as severe as the windy time. Conclusion The FLU-ENT software based on CFD method can realize the exposure and quantitative analysis of occupational hazardous substances under the complex conditions of inspection, sampling, dripping, etc., and realize the visualization of occupational exposure assessment.