摘要
基于Aspen HYSYS软件,针对天然气中的烃类和胺类组分分别选用Peng-Robinson状态方程和Acid Gas-Chemical Solvents状态方程,对处理量为100×10^(4) m^(3)/d的天然气脱酸装置进行模拟,分别考察胺液中哌嗪质量分数、胺液循环量、吸收塔和再生塔理论板数、贫胺液进吸收塔温度等操作参数对天然气脱酸的影响,并进行模拟优化。结果表明:天然气脱酸装置吸收塔塔顶的CO_(2)体积分数为23×10^(-6),H_(2)S体积分数小于1×10^(-6)。优化模拟后的操作条件为:胺液闪蒸罐操作压力500 kPa,再生塔塔底压力100 kPa,再生塔塔底再生的贫胺液中N-甲基二乙醇胺(MDEA)中CO_(2)质量分数0.3%,其塔底再沸器的热负荷4891 kW,贫胺液进吸收塔温度50℃,MDEA的循环量80 m^(3)/h,MDEA的质量分数36%,哌嗪质量分数4%,吸收塔和再生塔理论板数均为10块。
The Peng-Robinson equation of state and the Acid Gas-Chemical Solvents equation of state were selected for the hydrocarbon and amine components in natural gas in Aspen HYSYS software to simulate the natural gas deacidification unit of which the processing capacity was 100×10^(4) m^(3)/d.The effects such as piperazine mass fraction in amine liquid,circulating volume of amine liquid,theoretical plate number of absorption tower and regeneration tower,and operating parameters of lean amine liquid entering absorption tower temperature on natural gas deacidification were investigated and simulation optimization was carried out.The results showed that the CO_(2) volume fraction at the top of the absorption tower of the natural gas deacidification unit was 23×10^(-6) and the H_(2)S volume fraction was less than 1×10^(-6).The simulated and optimized operating conditions were as followed:the operating pressure of the amine liquid flash tank was 500 kPa,the bottom pressure of the regeneration tower was 100 kPa,the mass fraction of CO_(2) in N-methyldiethanolamine(MDEA)in the lean amine liquid regenerated at the bottom of the regeneration tower was 0.3%,the heat load of the bottom reboiler was 4891 kW,the temperature of the lean amine liquid entering the absorption tower was 50℃,the circulation rate of MDEA was 80 m^(3)/h,the mass fraction of MDEA was 36%,the mass fraction of piperazine was 4%and the theoretical plates of the absorption tower and the regeneration tower were both 10 pieces.
作者
朱晓艳
ZHU Xiao-yan(Beijing Petrochemical Engineering Co Ltd,Beijing 100107,China)
出处
《石化技术与应用》
CAS
2022年第2期102-107,共6页
Petrochemical Technology & Application
基金
陕西延长石油(集团)有限责任公司资助项目(项目编号:12008.0000.E 000.01-01)。
