天然气脱硫脱碳工艺的模拟优化  

Simulation and optimization for desulfurization and decarburization of natural gas

作　　者：季洪强[1] JI Hong - qiang(Petroleum Engineering Corporation, SINOPEC, Dongying 257026, Chin)

机构地区：[1]中国石化石油工程设计有限公司,山东东营257026

出　　处：《石化技术与应用》2017年第1期32-36,共5页Petrochemical Technology & Application

摘　　要：为了解决某天然气净化厂天然气硫、碳含量超标的问题,采用HYSYS模拟软件,对吸收塔的胺液进料量、吸收塔塔板数、胺液进料方式及再生塔的塔板数进行模拟。结果表明:在脱硫脱碳过程中,混合胺溶液m(H_2O)∶m(甲基二乙醇胺)∶m(二乙醇胺)为52∶45∶3最佳;吸收塔最优操作条件为:贫胺液总进料量为1 600 kmol/h,吸收塔塔板数为12块,贫胺液Ⅰ由吸收塔第1块塔板进料,贫胺液Ⅱ由吸收塔第5块塔板进料,m(贫胺液Ⅰ)/m(贫胺液Ⅱ)为7∶3时,吸收过程具有良好的脱酸气效果,天然气中H_2S的质量浓度为2 mg/m^3,CO_2的体积分数为2.32%。再生塔宜选用14或15块塔板。In order to solve the problems of excee- ding standard of sulfur and carbon contents in a natu- ral gas purification plant,HYSYS simulation software was adopted, and the amine amount and tray numbers of absorption tower, amine feeding modes, tray num- ber＇s of regeneration tower were simulated. The results showed that the optimum mixed amine solution ratio was m （ H2 O） ： m （MDEA） ： m （DEA） 52：45：3 for desulfurization and decarburization. The optimum operation conditions for absorption tower were as follows： poor amine molar flow 1 600 kmol/h ,tray numbers of absorption tower 12 ,poor amine Ⅰ entering absorption tower at the first tray, poor amine Ⅱ entering absorption tower at the fifth tray, and the ratio of poor amine Ⅰ to poor amine Ⅲ7：3,which had the better deacidification gas effects in the absorption process. The mass concentration of H2S 2 mg/m3 ,the volume fraction of CO2 2.32%, the tray number of regeneration tower 14 or 15.

关 键 词：天然气 脱硫 脱碳 HYSYS软件 吸收塔 再生塔 模拟 

分 类 号：TE644[石油与天然气工程—油气加工工程]