干气浅冷油吸收技术中甲烷解吸压力分析与优化  

Analysis and optimization of methane desorption pressure in dry gas shallow-cool oil-absorption technology

作　　者：贾继龙 叶昊天 常文畅 董宏光[1] Jia Jilong;Ye Haotian;Chang Wenchang;Dong Hongguang(School of Chemical Engineering,Dalian University of Technology,Dalian Liaoning 116024,China)

机构地区：[1]大连理工大学化工学院,辽宁大连116024

出　　处：《石油化工》2022年第12期1450-1457,共8页Petrochemical Technology

基　　金：国家自然科学基金项目(21276039)。

摘　　要：对干气浅冷油吸收技术的传统工艺进行分析,将C_(4)吸收塔下部的甲烷解吸过程单独设置一座低压甲烷解吸塔的工艺进行改进,并提出了利用炼厂低温余热替代蒸汽的方案。采用Aspen Plus流程模拟软件,研究了甲烷解吸塔压力对塔釜温度、压缩机负荷、解吸能耗和综合能耗的影响。模拟结果表明,甲烷解吸塔压力在2.7 MPa时综合能耗最低,为2 148.32 kg/h(标准油),比传统工艺降低了13.62%,其中蒸汽用量减少了40.25%,节能效果显著,较传统工艺需增加一座汽提塔,具有较高的推广价值。The traditional dry gas shallow-cool oil-absorption technology was analyzed,and it was brought up that setting up a separate low-pressure methane desorption tower for methane desorption process in the lower part of the C_(4) absorption tower,and using the low-temperature waste heat to replace steam.Aspen Plus software was used to simulate the effects of the pressure of the methane desorption column on the temperature of the column kettle,compressor duty,desorption energy consumption and total energy consumption.The results show that the total energy consumption is the lowest when the pressure of methane desorption tower is 2.7 MPa,which is 2148.32 kg/h(standard oil),and lower than the traditional process by 13.62%,while the steam consumption is reduced by 40.25%.The energy saving effect is remarkable,and a stripping tower should to be added,which demonstrated high promotion potential.

关 键 词：干气 浅冷油吸收 甲烷解吸塔 炼厂低温余热 流程模拟 

分 类 号：TQ028.1[化学工程]