干气回收碳三、碳四模拟研究  

Simulation of C_3 and C_4 recovery from dry gas in C_4

作　　者：郑拥军 成洁[2] 刘辉[2] ZHENG Yong-jun CHENG Jie LIU Hui(Hebei Xinqiyuan Energy-technology Developing Company Ltd. , Cangzhou 061108, China College of Chemical Engineering, Tianjin University, Tianjin 300072, China)

机构地区：[1]河北新启元能源技术开发股份有限公司,河北沧州061108 [2]天津大学化工学院,天津300072

出　　处：《精细与专用化学品》2017年第9期19-23,共5页Fine and Specialty Chemicals

摘　　要：碳四精细化工一体化装置的干气含有H_2、C_1~C_3等轻组分和少量C_4组分。目前干气主要作为燃料气,其中具有较高经济价值的C_3、C_4组分被直接烧掉,造成浪费。本文分析了干气夹带C_3、C_4组分的原因,提出了利用气体分离膜技术脱除干气中的一部分H_2,然后再冷凝分离的回收方案,并采用ASPEN PLUS软件对回收工艺进行了模拟计算。考察了H_2脱除率和冷凝温度对C_3、C_4回收率的影响。结果表明,综合考虑经济因素,当干气中的H_2脱除率为70%、使用30~40℃循环水冷凝时,C_3的回收率达到30%以上,C_4的回收率达到90%以上。The dry gas in C4 hydrocarbons refinery-chemical integrated process includes H2 ,C1 ,C3 hydrocar bons and a small amount C4. Mostly, this dry gas is burned as fuel gas, the Ca and C4 , which have high economic value, are wasted. The reasons of earring Ca and C4 from dry gas were analysed. The recovery process, which re moves a part of He from dry gas with gas separation membrane and then condensing posterior membrane dry gas to recover Ca and C4, was proposed. Process simulation software ASPEN PLUS was used to investigate the influence of H2 removal rate and condensational temperature on C3/C4 recovery rate. The simulation results indicated that in considering the economic factors when the H2 removal rate was 70% and the temperature of condensing water was 30~40℃ , C3 recovery rate was up to 30% and C4 recovery rate was more than 90%.

关 键 词：碳四综合利用 干气 C3、C4回收 气体分离膜 流程模拟 

分 类 号：TQ211[化学工程—有机化工]