摘要
运用HYSYS软件对天然气脱酸工艺流程进行了模拟,分析了贫液进入吸收塔的温度、循环量、组分以及各组分的浓度对整个系统脱酸效果和能耗的影响。模拟结果表明:提高贫液的进塔温度会使系统的脱酸效果变差,温度对H_2S吸收的影响要大于CO_2,而对系统总能耗的影响并不明显;提高胺液循环量会使系统脱酸效果增强,但对于MDEA+MEA混合液,系统能耗会升高,对于MDEA+DEA混合液,系统能耗会降低;在相同条件下,MDEA+MEA吸收剂的脱酸效果要强于MDEA+DEA吸收剂,但MDEA+MEA吸收剂产生的系统能耗要远高于MDEA+DEA吸收剂;对于一定浓度的混合胺液,提高MDEA的浓度虽然会使脱酸效果减弱,但可以缩短反应时间,降低系统能耗。该成果为天然气脱酸工艺的改进和优化提供了参考。
The software HYSYS is used to simulate the deacidification process of natural gas,the influence of the temperature,circulating volume,components and the concentration of every component of barren liquid when it enters the absorption tower on the deacidification effect and energy consumption of the whole system.The simulation results show that improving the tower entering temperature of barren liquid will make the deacidification effect of the system worse,temperature influence on the absorption of H_2S is more obvious than that on the absorption of CO_2,and has no obvious influence on the energy consumption of the whole system; improving the amine liquid volume will make the deacidification effect of the system enhanced,but for the MDEA+MEA mixed liquid,the energy consumption of the system will increase and for the MDEA+DEA mixed liquid the result will decrease; under the same condition,the deacidification effect of the MDEA+MEA absorber is better than that of the MDEA+DEA absorber,but the energy consumption of the MDEA+MEA absorber is much higher than that of the MDEA+DEA absorber; for a mixed amine liqiud with a certain concentration,increasing MDEA content will make the deacidification effect decreased,but the reaction time will be shorten,thus reducing the energy consumption of the system.The results provide a reference for improving and optimizing the deacidification process of natural gas.
出处
《油气田地面工程》
2017年第11期50-54,82,共6页
Oil-Gas Field Surface Engineering
关键词
MDEA
MEA
DEA
脱酸
温度
循环量
组分
浓度
MDEA
MEA
DEA
deacidification
temperature
circulating volume
component
concentration
