摘要
为了解决乙二醇回收(MEG Reclamation Unit, MRU)系统中传统换热器存在的换热效率不高、体积大占空间、易结垢等问题,分别针对全焊接板式换热器、螺旋板式换热器的内部液固两相流开展数值模拟研究,重点关注换热器内盐颗粒的运动与分布规律,并对可能发生的颗粒沉积甚至堵塞换热器的状况进行预测。模拟研究结果显示:全焊接板式换热器内由于凹槽(肋片)和凸台构成的波纹结构产生扰流作用,MEG循环液和盐颗粒在板对流道内的流场分布不均匀;螺旋板式换热器内流道光滑,无扰流结构和局部流通面积的突变,盐颗粒在其中的运动分布状态均匀,有利于随MEG贫液排出换热器;螺旋板式换热器作为MRU系统循环加热器的效果更好。研究结果可对MRU系统循环加热器的选型和参数设计提供理论参考。
This research studies the problems of the traditional heat exchanger of MRU system that has low heat exchange efficiency, occupies large plot size and is prone to scaling. The liquid-solid two-phase flow in detachable all-welded plate heat exchanger and spiral plate heat exchanger was numerically simulated, focusing on the movement and distribution of salt particles in the heat exchanger, and the possible particle deposition and even blockage of the heat exchanger were predicted. The simulation results show that the distribution of MEG circulating fluid and salt particles in counter current flow passage of the all-welded plate heat exchanger is uneven due to the disturbance caused by grooves(rib) and corrugated boss-type structure. The flow field in the spiral plate heat exchanger is smooth without the turbulent flow and the sudden change in localized flow area. The salt particle movement is in uniform distribution, which facilitates the discharge of lean MEG from heat exchanger. It is concluded that spiral plate heat exchanger is more suitable and effective in MRU system. The results can provide reference for selection and parameter design of recirculation heater in MRU system.
作者
胡凯
吴巍
邹迪
杨宝安
朱晓丽
刘宗园
HU Kai;WU Wei;ZOU Di;YANG Baoan;ZHU Xiaoli;LIU Zongyuan(Tianjin Chemical Research and Design Institute Co.,Ltd of CNOOC,Tianjin,300131,China;Anjie Fluid Management Co.,Ltd.,Chengdu,Sichuan,610207,China;China University of Petroleum(East China),Qingdao,Shandong,266555,China)
出处
《天然气与石油》
2022年第4期39-45,共7页
Natural Gas and Oil
基金
中国海洋石油集团有限公司天津化工研究设计院有限公司“MRU预处理单元的技术开发及工艺流程模拟项目”(TJYWW004-2021)。
关键词
MRU系统
全焊接板式换热器
螺旋板式换热器
盐颗粒运动与分布
MRU system
Detachable all-welded plate heat exchanger
Spiral type heat exchanger
Movement and distribution of salt particles
作者简介
胡凯(1988-),男,山东济南人,工程师,硕士,主要从事化工过程装备技术开发工作。E-mail:93725571@qq.com。
