MDEA+MEA天然气脱碳工艺影响因素

doi:10.11949/j.issn.0438-1157.20150698

化工学报 ›› 2015, Vol. 66 ›› Issue (S2): 250-256.DOI: 10.11949/j.issn.0438-1157.20150698

MDEA+MEA天然气脱碳工艺影响因素

陈杰¹, 张新军², 褚洁¹, 史泽林², 唐建峰²

1. 中海石油气电集团技术研发中心, 北京 100027;
2. 中国石油大学(华东)储运与建筑工程学院, 山东青岛 266580

收稿日期:2015-05-25 修回日期:2015-06-25 出版日期:2015-08-31 发布日期:2015-08-31
通讯作者: 陈杰
基金资助:
国家工信部浮式液化天然气生产储卸(LNG-FPSO)总体设计关键技术项目(工信部联装[2012]534号);中央高校基本科研业务费专项资金资助项目(14CX05033A)。

Factors affecting decarbonization of natural gas with MDEA+MEA

CHEN Jie¹, ZHANG Xinjun², CHU Jie¹, SHI Zelin², TANG Jianfeng²

1. Research and Devolopment Center, CNOOC Gas & Power Group, Beijing 100027, China;
2. College of Pipeline and Civil Engineering, China University of Petroleum, Qingdao 266580, Shandong, China

Received:2015-05-25 Revised:2015-06-25 Online:2015-08-31 Published:2015-08-31
Supported by:
supported by the National Ministry of Key Technologies of Floating Liquefied Natural Gas Production, Storage and Offloading (LNG-FPSO) Overall Design (Ministry-Mounted [2012] 534) and the Fundamental Research Funds for the Central Universities of Ministry of Education of China (14CX05033A).

摘要/Abstract

摘要：

基于自主设计建设的胺法脱酸中试实验装置,针对目前常用的天然气脱碳方法醇胺法,利用工业中应用较多的N-甲基二乙醇胺(MDEA)+一乙醇胺(MEA)的前期优选配方(2 mol·L^-1+1 mol·L^-1),进行醇胺法脱碳装置工艺参数优化实验研究,结果用于指导工业生产。本文在CO₂含量6%和4%两种原料气气质下,采用控制变量法,分析了吸收和再生参数对胺法脱碳工艺的影响规律,优选出操作参数。结果显示:在本实验操作参数范围内提高吸收温度、吸收压力和胺液循环流量有利于提高胺液吸收性能,提高再生温度、降低再生压力有利于提高胺液再生性能,但各参数受到反应机理、气液平衡、装置能耗、胺液性质等影响,存在最优值;本实验装置系统下,原料气处理量为50 Nm³·h^-1时,MDEA+MEA脱碳的优化工艺操作参数为:吸收温度55℃,吸收压力3.5~4 MPa,胺液循环流量0.25 m³·h^-1,再生温度120℃,再生压力50 kPa。

关键词: 天然气, 脱碳, 醇胺法, 中试装置, MDEA+MEA, 参数优化

Abstract:

Based on the independently designed amine deacidification experimental device, the experiment adopted the common-used oxyamine process and preliminary preferred amine formulation (2 mol·L^-1+1 mol·L^-1) to study the optimization of operating parameters of alcohol amine gas decarbonization.The result are will be used to guide the industrial production.This paper analyzed the influence of the operating parameters on the amine decarbonization process under the control variable method with 6% and 4% CO₂ content and get the optimizing operating parameter.The results show that: the increase of the absorption temperature, the absorption pressure, and the amine solution circulation flow can improve amine absorption performance, the increase of the performance.However, all the parameters are influenced by the reaction mechanism,vapor-liquid equilibrium, the energy consumption, the nature of the amine solution and other factors, there is an optimal value; Under this experimental system, when the raw gas processing capacity is 50 Nm³·h ^-1,The optimization results of operating parameters are as follows: the absorption temperature is 55℃,the absorption pressure is 3.5-4 MPa, the amine solution circulation flow is 0.25 m³·h^-1, the regeneration temperature is 120℃ and the regeneration pressure is 50 kPa.

Key words: natural gas, decarbonization, alcohol amine, pilot plant, MDEA+MEA, parameters optimization

中图分类号:

TE644

陈杰, 张新军, 褚洁, 史泽林, 唐建峰. MDEA+MEA天然气脱碳工艺影响因素[J]. 化工学报, 2015, 66(S2): 250-256.

CHEN Jie, ZHANG Xinjun, CHU Jie, SHI Zelin, TANG Jianfeng. Factors affecting decarbonization of natural gas with MDEA+MEA[J]. CIESC Journal, 2015, 66(S2): 250-256.

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MDEA+MEA天然气脱碳工艺影响因素

Factors affecting decarbonization of natural gas with MDEA+MEA

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