井口天然气醇胺法脱酸系统的模拟优化  

Optimization of the Miniature Wellhead Natural Gas Alkanolamine Process Deacidification Units

作　　者：李梅[1,2] 程逵炜[1,2] 孙兆虎[1] 公茂琼[1] 吴剑峰[1] 

机构地区：[1]中国科学院理化技术研究所低温工程学重点实验室,北京100190 [2]中国科学院大学,北京101408

出　　处：《工程热物理学报》2015年第9期1853-1857,共5页Journal of Engineering Thermophysics

基　　金：国家自然科学基金(No.51106171);国家重点基础研究发展计划项目(No.2011CB710701)

摘　　要：井口天然气中除含低分子饱和烃类外,还含有二氧化碳（CO2）和硫化氢（H_2S）等酸性气体,它们对环境危害较大、管道腐蚀较为严重,在后续集输前需脱除。本文运用流程模拟软件ASPEN PLUS,对二乙醇胺（DEA）法脱除小型井口天然气中CO_2和H_2S的工艺体系进行模拟,介绍了建立模型过程中模块选取、物性方法的选择、工艺参数的输入以及灵敏度分析功能,考察了吸收剂浓度、天然气流量、液气比等工艺参数对脱碳效果的影响。灵敏度分析模拟给出了最佳操作参数,即：吸收塔塔板数为20~23块,吸收塔压力为4.43~5.00 MPa.,液气比为0.9885~1.10（mol/mol）,贫液中CO_2的摩尔分数为0.0009~0.001。The miniature wellhead natural gases contain not only low molecular hydrocarbons, but also some acidic gases, such as CO2 and H2S. These gases are harmful to the environment. Besides, they will lead to the pipeline corrosion. In this thesis, the process simulation software Aspen Plus was used to simulate the diethanolamine （DEA） method to remove the CO2 and H2S from the small wellhead natural gas. The process module selection, thermodynamic method selection, parameters input were introduced in this paper. Furthermore, factors that influence the decarburization such as the absorbent concentration, gas flow, the ratio of liquid to gas were analyzed. The sensitivity analysis results give the optimum operation parameters： 1） the plate number of the absorption tower is 20 to 23; 2） the absorption tower pressure is 4.43 ~ 5.00 MPa; 3） the ratio of liquid to gas is 0.9885 ,- 1.10 （mol/mol）; 4） the mole fraction of CO2 in the barren solution is 0.0009~0.001.

关 键 词：天然气 CO2、H2S 二乙醇胺(DEA) ASPEN PLUS 

分 类 号：TK123[动力工程及工程热物理—工程热物理]