摘要
采用分子动力模拟计算方法,对装卸过程中液化天然气泄漏扩散情况进行分析.采用火焰离子化侦测器对泄漏进行检测,建立泄漏扩散模型,在分子模拟条件下,对该模型进行结构性优化,并设立周期性边界条件,完成泄漏扩散分子动力计算.分析了泄漏时间和泄漏口位置对液化天然气扩散的影响,结果表明,随着泄漏时间的增加,天然气扩散高度呈现先上升后下降趋势;天然气泄漏口位置越低,浓度越大,产生的危害越大.
The leakage and diffusion of liquefied natural gas(LNG) during loading and unloading were analyzed by molecular dynamic simulation method. Liquefied natural gas leakage was detected by using a flame ionization detector.And the leakage diffusion model of liquefied natural gas(LNG) was established. Under the condition of molecular simulation, the structural optimization of the model was carried out, and the periodic boundary conditions were set up to complete the molecular dynamic calculation of the leakage and diffusion of liquefied natural gas(LNG). The effect of leakage time and leakage location on LNG diffusion was analyzed. The results showed that the gas diffusion height increased first and then decreased with the increase of leakage time. The lower the location of natural gas leak, the greater the concentration, and the greater the harm.
作者
程新求
李振泉
CHENG Xin-qiu;LI Zhen-quan(PetroChina Kunlun Gas Co., Ltd. Guangdong Branch, Guangdong Guangzhou 510308, China;Kunlun Energy Co., Ltd. Security Oversight Center, Tianjin 300457, China)
出处
《当代化工》
CAS
2019年第8期1797-1800,共4页
Contemporary Chemical Industry
基金
国家级课题，在线教育研究基金(全通教育)重点课题，天然气管道输送安全技术问题探讨：ZXJYKTY492
关键词
装卸
液化天然气
泄漏扩散
分子动力模拟
loading and unloading
liquefied natural gas
leakage and diffusion
molecular dynamic simulation
