基于CFD的套管式高压反应器夹套入口结构优化  

Optimization of Jacket Inlet Structure of High Pressure Tubular Reactor Based on CFD

作　　者：杜嘉敏 刘伟 DU Jiamin;LIU Wei(College of Machinery and Electronic Engineering,Guangdong University of Petrochemical Technology,Maoming 525000,China)

机构地区：[1]广东石油化工学院机电工程学院,广东茂名525000

出　　处：《广东石油化工学院学报》2021年第1期63-67,共5页Journal of Guangdong University of Petrochemical Technology

摘　　要：针对套管式高压反应器夹套的泄漏失效,为探寻夹套的合理入口结构,采用CFD数值模拟方法,对原入口结构、等径正交入口结构、切向入口结构及锥管入口结构进行了研究。结果表明,原结构入口管位置和收缩环之间存在流动死区,靠近入口管位置的下游流域出现涡旋区,使得脱盐水不能及时将反应器产生的热量带走,因此形成高温区,脱盐水处于沸腾状态引起汽蚀,使得夹套减薄而失效。等径正交结构、夹套切向进水结构能使死区内和涡流区内的脱盐水不再滞留,流速有明显提高,温度有明显下降,可以解决脱盐水汽蚀的问题,但锥管进口结构的效果不明显。依据效果来看,切向入口结构效果最好,等径正交入口结构次之,锥管入口结构无明显的效果。Aiming at the leakage failure of the jacket in a high-pressure tubular reactor,the CFD numerical simulation method is used to compare the original inlet structure,equal diameter orthogonal inlet structure,tangential inlet structure and cone inlet structure.The results show that there is a dead zone between the inlet pipe position and the contraction ring of the original structure,and the vortex area appears in the downstream drainage area near the inlet pipe position,which makes the desalted water unable to take away the heat generated by the reactor in time,thus forming a high temperature zone.The desalted water is in boiling state,causing steam erosion,which makes the jacket thinner and invalid.The equal diameter orthogonal structure and jacket tangential inlet structure can make the desalted water no longer stay in the dead zone and vortex zone,the flow rate is significantly increased and the temperature is obviously decreased,which can solve the problem of desalted water cavitation,but the effect of cone tube inlet structure is not obvious.According to the effect,the tangential inlet structure has the best effect,the equal diameter orthogonal inlet structure takes the second place,and the cone tube inlet structure has no obvious effect.

关 键 词：套管式高压反应器 汽蚀 CFD 夹套入口 

分 类 号：TE966[石油与天然气工程—石油机械设备]