液化烃球罐泄漏温度场及材料适应性研究  

Study on Leakage Temperature Field and Material Adaptability of Liquefied Hydrocarbon Spherical Tanks

作　　者：凌晓东[1] 党文义[1] 韩中枢[1] 于安峰[1] 万古军[1] 

机构地区：[1]中国石化青岛安全工程研究院化学品安全控制国家重点实验室,山东青岛266071

出　　处：《安全、健康和环境》2017年第3期9-13,共5页Safety Health & Environment

摘　　要：针对高压储存的液化烃一旦发生泄漏,会迅速气化并吸热,使得球罐温度降低,严重时温度可能低于标准中允许的球罐材质最低适应温度的问题,建立球罐三维物理模型,基于CFD模拟的方法,采用雷诺时均的Navier-Stokes方程和k-ε湍流模型,分析球罐管线发生泄漏时球罐本体及周围环境的温度分布情况,探讨了不同泄漏孔径对球罐温度的影响。研究结果表明球罐发生泄漏时,球罐外部温度会明显降低,由于保温层的存在,球罐本体温度降幅不大。但在泄漏孔附近会形成较小的低温区,超过了16MnR材质的低温承受能力,存在较大的风险。Liquefied hydrocarbon was normally stored under high pressure in the spherical tank. Once leak- age occurs, the liquefied hydrocarbon will quickly gasify and absorb a great deal of heat, making tem- perature of spherical tank decrease, the temperature may be lower than the standard spherical tank materi- al is allowed in the lowest temperature. In order to investigate this process, physical model of spherical tank with liquefied hydroearbon was established, and the Reynolds time averaged Navier - Stokes equation and k -ε turbulent model as the CFD simulation method were utilized in this study. The temperature distribution of the spherical tank and the surrounding environment after spherical tank pipeline leaking was calculated based on which the influence of leak area on the spherieal tank temperature distribution was an- alyzed. Researeh results show that during the leaking scenario, the external temperature of spherical tank will decrease. Because of the existence of the thermal insulation layer, the spherieal tank temperature de- crease slightly. However, around the point of exit there will form a small low temperature zone; lower than the low temperature tolerance of 16 MnR materi- als, there is great risk to the spherical tank.

关 键 词：液化烃球罐 泄漏 温度场 CFD 模拟 材料适应性 

分 类 号：TQ053.2[化学工程]