丙烷脱氢分离工艺的模拟与分析  

Simulation and Analysis of Separation Process in Propane Dehydrogenation to Propylene

作　　者：张琦[1] 隋志军[1] 顾雄毅[1] 周兴贵[1] 

机构地区：[1]华东理工大学化学工程联合国家重点实验室,上海200237

出　　处：《石油化工》2015年第4期421-428,共8页Petrochemical Technology

基　　金：国家高技术研究发展计划项目(2012AA040306);中央高校基本科研业务费专项资金项目(222201313006);国家自然科学基金项目(21376076)

摘　　要：对300 kt/a丙烷脱氢装置的分离工艺流程采用Aspen Plus化工流程模拟软件进行模拟,通过比较不同操作条件下各单元的模拟结果并分析各单元的能耗,确定急冷、压缩、深冷分离、脱C2、丙炔加氢和丙烯精馏等单元的操作条件,考察了在已确定的操作条件下各分离单元的能耗。模拟结果表明,丙烷脱氢分离工艺主要操作条件为:压缩机出口压力1.10 MPa、深冷分离温度-95℃、脱乙烷塔操作压力0.90 MPa、丙烯精馏塔顶操作压力0.75 MPa,使用热泵精馏塔;丙烷脱氢分离工艺中,主要耗能单元是压缩和深冷分离单元及丙烯精馏单元,其能耗分别占分离工艺总能耗的50.4%和35.6%,脱C2单元和急冷单元的能耗分别占总能耗的11.8%和2.2%。The separation process in a 300 kt/a plant for the dehydrogenation of propane to propylene was simulated by means of Aspen Plus software. The simulation results for quenching unit, compression unit, cryogenic separation unit, deethanizer unit, propyne hydrogenation unit and propylene rectification unit, and the energy consumptions of the units were investigated to determine the operation parameters. It was showed that the main operation parameters for the separation process were compressor discharge pressure 1.10 MPa, cryogenic separation temperature -95 ℃, deethanizer operating pressure 0.90 MPa and propylene rectification tower operating pressure 0. 75 MPa with heat pump disti- llation. In the separation process, the main energy consumption units are compression unit, cryogenic separation unit and propylene rectification unit. The energy consumptions of the compression and cryogenic separation units, propylene rectification unit, deethanizer unit and quenching unit are 50. 4%, 35.6%, 11.8% and 2.2% of the total energy-consumption, respectively.

关 键 词：丙烷脱氢 分离工艺 丙烯 级联制冷 热泵精馏 

分 类 号：TQ021.8[化学工程]