天然气液化与凝液回收工艺联用能耗研究  

Research on combined energy consumption of natural gas liquefaction and condensate recovery process

作　　者：姚丹 YAO Dan(No.9 Oil Production Plant of Daqing Oilfield Co.,Ltd.)

机构地区：[1]大庆油田有限责任公司第九采油厂,黑龙江省大庆市163000

出　　处：《石油石化节能与计量》2024年第10期71-75,共5页Energy Conservation and Measurement in Petroleum & Petrochemical Industry

摘　　要：为提高天然气液化工艺的能量利用率和设备集成度,将天然气液化工艺和凝液回收工艺集成在同一流程,两者共用换热器和制冷循环流程。基于模拟软件进行工艺建模,分析了联用工艺较单独工艺的区别和优势,通过建立目标函数、约束条件和决策变量等实现了联用工艺参数的持续优化,从能耗和?损失两方面分析了优化效果。结果表明,联用工艺可省去脱甲烷塔塔顶冷凝器和分离器的设置,降低塔底重沸器的能耗,减少设备投资和运行成本,联用工艺优化后,混合冷剂流量、配比及压力参数均有所变化,单位能耗从0.421 kWh/kg降至0.375 kWh/kg,降幅10.92%。In order to improve the energy utilization rate and equipment integration of natural gas liquefaction process,the natural gas liquefaction process and condensate recovery process are integrated in the same process,and they shared the heat exchanger and refrigeration cycle process.Based on the sim-ulation software,the process modeling is carried out,and the combined process are analyzed compared with the differences and advantages of separate process.Through establishing the objective function,constraint conditions and decision variables,the continuous optimization of combined process parameters is realized,and the optimization effect is analyzed from energy consumption and exergy loss.The results show that the combined process can reduce the setting of condenser and separator at the top of the demethanization tower,reduce the energy consumption of reboiler at the bottom of the tower,reduce the equipment investment and operation cost.After the optimization of combined process,the flow rate,ratio and pressure parameters of the mixed refrigerant are changed,and the unit energy consumption is reduced from 0.421 kWh/kg to 0.375 kWh/kg with a decrease of 10.92%.

关 键 词：天然气液化 凝液回收 联用工艺 单位能耗 ?损 

分 类 号：TE64[石油与天然气工程—油气加工工程]