采出水中乙二醇回收工艺模拟与能耗优化  

Recycling process simulation and energy consumption optimization of ethylene glycolin produced water

作　　者：石洋 SHI Yang(No.5 Oil Production Plant of Daqing Oilfield Co.,Ltd.)

机构地区：[1]大庆油田有限责任公司第五采油厂,黑龙江省大庆市163414

出　　处：《石油石化节能与计量》2024年第5期46-50,共5页Energy Conservation and Measurement in Petroleum & Petrochemical Industry

摘　　要：针对当前采出水中乙二醇回收工艺存在运行效率低、能耗高的问题,结合HYSYS工艺软件建立了稳态模拟流程,基于控制变量法,分析了不同工艺参数对能耗和乙二醇损失量的影响,并结合现场实际工况对换热流程进行了优化。结果表明,贫液浓度、再沸器操作压力、回流比与总能耗呈正相关;再生塔进料温度、冷凝器操作压力与总能耗呈负相关。确定进料温度为70℃,进料位置为第15块塔板,再沸器和冷凝器的操作压力分别为140 kPa、100 kPa时,可以满足贫液浓度的需求且能耗较低。建议将塔顶气相中的热量充分利用,优化流程只需新增一个塔顶气/富液换热器,优化后每年可减少运行成本17.16万元,投资回收期为2.33 a。In view of the problems of low operating efficiency and high energy consumption in the cur-rent ethylene glycol recovery process of produced water,the steady-state simulation process is estab-lished,combined with the process software of HYSYS.Based on the control variable method,the influ-ences of different process parameters on energy consumption and glycol loss are analyzed and the heat trans-fer process is optimized according to the actual working conditions on site.The results show that the lean liquid concentration,the reboiler operating pressure and the reflux ratio are positively correlated with total energy consumption,while the feed temperature of regeneration tower and condenser operating pressure are negatively correlated with total energy consumption.When the feed temperature is 70℃,the feed po-sition is the 15th tray.When the operating pressure of reboiler and condenser is 140 kPa and 100 kPa re-spectively,the demand of lean liquid concentration can be met and the energy consumption is low.It is suggested that the heat of tower top gas phase should be fully utilized,and only one additional top gas or rich liquid heat exchanger is needed to optimize the process,which can reduce the operating cost by 171600 yuan per year after optimization.The investment payback period is 2.33 years.

关 键 词：采出水 乙二醇回收工艺 再生塔 HYSYS 冷凝器 

分 类 号：TQ223.162[化学工程—有机化工] TE39[石油与天然气工程—油气田开发工程]