天然气脱轻烃装置制冷剂循环系统的多参数优化  

Multi-parameter optimization of mixed refrigerant circulation system in natural gas light hydrocarbon removal system

作　　者：李开宇 钟伟 李建刚 严志强 陈颖 曹改瑜 刘桂莲[1] LI Kai-yu;ZHONG Wei;LI Jian-gang;YAN Zhi-qiang;CHEN Ying;CAO Gai-yu;LIU Gui-lian(School of Chemical Engineering and Technology,Xi′an Jiaotong University,Xi′an 710049,China;Oil and Gas Co Ltd,Changqing Oilfield(Yulin),PetroChina,Yulin 719000,China)

机构地区：[1]西安交通大学化学工程与技术学院,陕西西安710049 [2]中国石油长庆油田(榆林)油气有限公司,陕西榆林719000

出　　处：《石化技术与应用》2023年第6期448-455,共8页Petrochemical Technology & Application

基　　金：国家自然科学基金资助项目(项目编号:22078259)。

摘　　要：为降低制冷装置区能耗及确保主冷箱最大传热温差低于25.00℃的综合控制目标,使用化工稳态流程模拟软件Aspen Hysys V 10版,对中国石油长庆油田(榆林)油气有限公司1.09万t/a天然气脱轻烃装置混合制冷剂制冷循环供冷(MRC)系统进行了建模,并构建了主冷箱冷热复合曲线,进行了多参数灵敏度分析优化。结果表明:该MRC系统关键控制参数的制冷剂分离器温度、主冷箱高压制冷剂流量最优值分别为1.75℃,64 960.00 m^(3)/h,制冷剂压缩机入口、出口压力的最优值分别为270.00,2 940 kPa;在该最优工况下运行的主冷箱内最大传热温差为23.47℃,较优化前降低了2.37℃,制冷装置区能耗为5 799.17 kW,较优化前降低了2 256.82 kW,降幅为28.01%。In order to reduce the energy consumption in the refrigeration device area and ensure that the maximum heat transfer temperature difference of the main cold box was lower than 25.00℃,the chemical steady-state process simulation software Aspen Hysys V10 was used to model the mixed refrigerant circulation cooling(MRC)system of the 10.9 kt/a natural gas light hydrocarbon removal unit of Oil and Gas Co Ltd of Changqing Oilfield(Yulin),PetroChina,and the cold-heat compound curve of the main cold box was constructed after simulation.Then the multi-parameter sensitivity analysis and optimization were carried out.The results showed that the optimal values of the temperature of the refrigerant separator and the high-pressure refrigerant flow rate of the main cold box related to the key control parameters of the MRC system were 1.75℃and 64960.00 m3/h respectively,and the optimal inlet and outlet pressure of the refrigerant compressor were 270.00,2940.00 kPa,respectively.Comparing with that before optimization,under the optimal operation conditions,the maximum heat transfer temperature difference in the main cold box was 23.47℃by the decrement of 2.37℃,and the energy consumption in the refrigeration device area was 5799.17 kW by the reduction of 28.01%.

关 键 词：混合制冷剂制冷循环供冷系统 天然气脱轻烃装置 主冷箱 最大传热温差 多参数优化 节能降耗 

分 类 号：TQ021.8[化学工程]