气浮循环泵机械密封抗气蚀优化设计  

Optimization Design of Mechanical Seal for Air Floatation Circulating Pump Against Cavitation Erosion

作　　者：程政皓 于浩 辜强 高景辉 陈汝泽 Cheng Zhenghao;Yu Hao;Gu Qiang;Gao Jinghui;Chen Ruze(Wenchang 13-1/2 Oilfield Operation Company of CNOOC(China)Co.,Ltd,Zhanjiang 524057)

机构地区：[1]中海石油(中国)有限公司文昌13-1/2油田作业公司,广东湛江524057

出　　处：《石化技术》2024年第2期44-45,6,共3页Petrochemical Industry Technology

摘　　要：气浮装置通常运用在海上石油平台上,设计之初的目的是为了处理海上石油生产过程中产生的含油废水,其原理是通过向含油废水中通入氮气,使水中充盈大量微细气泡,这些气泡会附着于杂质颗粒上,形成比重小于水的漂浮体,并逐渐往水面上浮。气浮循环离心泵必须不间断工作,但是由于气浮循环离心泵所运输的介质为含有大量细微气泡的混合双相流,这必然会发生空化进而导致气蚀,而本气浮循环泵所使用的机械密封是通过引流运输介质对气机械密封内部进行冷却润滑,故机械密封轴向压力补偿装置经常性受到破坏,本文通过对现场气蚀装置进行流固耦合模拟并结合现场安装实验结果对气浮循环泵的机械密度进行抗气蚀设计。Airflotation devices are usually used on offshore oil platforms,and their initial design was to treat oily wastewater generated during offshore oil production.The principle is tofill the water with a large number offine bubbles by injecting nitrogen into the oily wastewater.These bubbles will attach to impurity particles,forming afloating body with a specific gravity smaller than water,and graduallyfloat upwards towards the water surface.The air flotation circulating centrifugal pump must work continuously.However,since the medium transported by the airflotation circulating centrifugal pump is a mixed two-phaseflow containing a large number offine bubbles,This will inevitably lead to cavitation,leading to cavitation.The mechanical seal used in this airflotation circulating pump cools and lubricates the internal part of the air mechanical seal by draining the transportation medium.Therefore,the axial pressure compensation device of the mechanical seal is often damaged.This article conductsfluid solid coupling simulation of the on-site cavitation installation and combines the results of on-site installation experiments to design the mechanical density of the airflotation circulating pump for cavitation resistance.

关 键 词：气浮装置 机械密封 气蚀 液气两相流 

分 类 号：TE95[石油与天然气工程—石油机械设备]