柱状气液分离器分离效果的数值模拟分析  

Numerical Simulation Analysis of Separation Performance of Columnar Gas-Liquid Separator

作　　者：马粤 朱红钧 傅剑峰 张德政 杨佳奇 Ma Yue;Zhu Hongjun;Fu Jianfeng;Zhang Dezheng;Yang Jiaqi(CNOOC Zhanjiang Company;Southwest Petroleum University Petroleum Engineering School;SCIMEE Tech.& Sci.Co.,Ltd.)

机构地区：[1]中海石油(中国)有限公司湛江分公司,广东省湛江市524000 [2]西南石油大学石油与天然气工程学院 [3]环能科技股份有限公司

出　　处：《石油机械》2019年第10期49-55,87,共8页China Petroleum Machinery

摘　　要：为了降低海管输送压力,减轻FPSO终端生产水处理负担,在采油平台新增一套油气水处理流程,流程中的气液分离器采用GLCC+立式分离器的设计。为探究处理量及液位控制等因素对其分离效果的影响,建立了新增系统中气液分离器的三维模型。借助ANSYS FLUENT的Mixture多相流模型对分离器内流场进行数值模拟,分析了在不同处理量工况下和液位控制对分离效率的影响。研究结果表明:将分离器液位控制在80~100 cm,可以保证在平台采取各种增产措施的处理量工况下,液相出口的含气体积分数在2%以下,避免对下游油水分离设备产生影响,同时,气相出口携液体积分数控制在5%左右,含油体积分数在0.5%以下;分离器气相出口气体的洁净度未达到气浮选装置气源气的要求。研究结果可为海上采油平台油气水处理设备的选型、设计及工作参数的优化提供参考。To reduce the pressure of marine pipe transportation and reduce the produced water treatment burden of FPSO terminal,a new oil,gas and water treatment process is added to the production platform.The gas-liquid separator in the process adopts the design of GLCC+vertical separator.To investigate the influence of treatment volume and liquid level control on separation performance,a three-dimensional model of gas-liquid separator in the new system is established.The numerical simulation of the flow field in the separator is carried out by means of ANSYS FLUENT’s Mixture multiphase flow model.The influences of different processing conditions and liquid level control on the separation efficiency are analyzed.The results show that the liquid level of the separator controlled at 80~100 cm could ensure that the gas content of the liquid phase outlet is below 2%under various stimulation resulted treatment on the platform,eliminating the influences on downstream oil-water separation equipment.Meanwhile,the gas phase outlet liquid volume content is controlled at about 5%,and the oil volume content is below 0.5%.Studies also show that the gas from the gas phase outlet of the separator cannot be directly used as the source gas of the gas flotation device due to the cleanliness.The research results can provide references for the selection,design and optimization of working parameters of oil,gas and water treatment equipment for offshore oil production platforms.

关 键 词：气液分离 分离效果 数值模拟 处理量 液位控制 GLCC 

分 类 号：TE868[石油与天然气工程—油气储运工程]