长岭天然气净化站能耗优化研究
发布时间：2018-11-12 14:21
【摘要】：针对富含CO2天然气脱除CO2技术现状和现有净化技术存在的问题进行研究,并在活化剂、工艺及运行条件优化、变压吸附和膜分离集成技术等方面指明新的研发方向,希望富含CO2天然气净化的整体技术得以成熟,从而促进我国富含CO2天然气的大力开发。活化MDEA法是富含CO2天然气脱除CO2的重要方法,且技术成熟。但是,为了降低能耗,提高经济效益,还需进一步优化工艺流程及运行参数。本文通过对长岭气田富含CO2天然气净化装置的研究,对经济运行指标进行分析,结果表明,可把综合能耗作为优化目标,装置实际单位综合能耗为1.028×104 MJ/104天然气,高于设计值,存在节能空间,可根据自身的生产特点挖掘节能潜力。于是运用Aspen HYSYS软件模拟,通过运行数据与模拟数据的对比来考察两个模型的准确性,结果表明,Li-Mather模拟结果与运行数据更为吻合,因此选定Li-Mather为模型进行模拟。并且,讨论了脱CO2方法和工艺流程对能耗的影响。同时,本文对富含CO2天然气脱CO2工艺运行参数(原料气温度、原料气处理负荷、MDEA贫液流率、吸收塔塔板数、吸收塔压力、温度、再生塔塔板数)对脱CO2能耗的影响进行了重点研究。通过单因素实验,确定了活化MDEA溶液脱除天然气中CO2过程的关键操作参数(原料气温度、原料气处理负荷、MDEA贫液流率、吸收塔压力、吸收塔温度、再生塔塔板数)和优化区间。最后,通过响应面法对实验方案进行设计,并通过实验结果的分析获得最佳的过程参数:原料气温度25℃,原料气处理负荷82.12%,MDEA贫液流率16150 kmol/h,吸收塔压力4.21 MPa,吸收塔温度54.8℃,再生塔塔板数19,总能耗3.55315×107 kJ/h,相比模拟实验值,误差极小,仅为0.02%。相比净化站现阶段MDEA脱CO2工段实际能耗,优化后总能耗降低了26.97%。
[Abstract]:The present situation of CO2 rich natural gas CO2 removal technology and the problems existing in existing purification technologies are studied, and a new research direction is pointed out in the aspects of activator, optimization of process and operation conditions, pressure swing adsorption and membrane separation integration technology, etc. It is hoped that the whole technology of purifying rich CO2 natural gas will be mature and promote the development of rich CO2 natural gas in China. Activated MDEA method is an important method for removing CO2 rich in CO2 natural gas, and the technology is mature. However, in order to reduce energy consumption and improve economic efficiency, it is necessary to further optimize the technological process and operation parameters. Based on the research of CO2 rich gas purification unit in Changling gas field, the economic operation index is analyzed. The results show that the comprehensive energy consumption can be taken as the optimization goal, and the actual unit comprehensive energy consumption of the unit is 1.028 脳 10 ~ 4 MJ/104 natural gas. Higher than the design value, there is energy saving space, according to their own production characteristics can tap the potential of energy conservation. The accuracy of the two models is investigated by comparing the running data with the simulated data by using Aspen HYSYS software. The results show that the simulation results of Li-Mather are more consistent with the running data, so Li-Mather is selected as the model to simulate. In addition, the influence of CO2 removal method and technological process on energy consumption is discussed. At the same time, the operating parameters (raw gas temperature, raw gas treatment load, lean liquid flow rate of MDEA, plate number of absorber, pressure of absorber, temperature of absorber, etc. The influence of regeneration tower plate number on the energy consumption of CO2 was studied. Through single factor experiments, the key operating parameters of CO2 removal from natural gas by activated MDEA solution (raw gas temperature, raw gas treatment load, MDEA lean liquid flow rate, absorption tower pressure, absorption tower temperature, etc.) were determined. Regeneration tower plate number) and optimization interval. Finally, the experimental scheme was designed by response surface method, and the optimum process parameters were obtained through the analysis of experimental results: raw gas temperature 25 鈩，
本文编号：2327362
[Abstract]:The present situation of CO2 rich natural gas CO2 removal technology and the problems existing in existing purification technologies are studied, and a new research direction is pointed out in the aspects of activator, optimization of process and operation conditions, pressure swing adsorption and membrane separation integration technology, etc. It is hoped that the whole technology of purifying rich CO2 natural gas will be mature and promote the development of rich CO2 natural gas in China. Activated MDEA method is an important method for removing CO2 rich in CO2 natural gas, and the technology is mature. However, in order to reduce energy consumption and improve economic efficiency, it is necessary to further optimize the technological process and operation parameters. Based on the research of CO2 rich gas purification unit in Changling gas field, the economic operation index is analyzed. The results show that the comprehensive energy consumption can be taken as the optimization goal, and the actual unit comprehensive energy consumption of the unit is 1.028 脳 10 ~ 4 MJ/104 natural gas. Higher than the design value, there is energy saving space, according to their own production characteristics can tap the potential of energy conservation. The accuracy of the two models is investigated by comparing the running data with the simulated data by using Aspen HYSYS software. The results show that the simulation results of Li-Mather are more consistent with the running data, so Li-Mather is selected as the model to simulate. In addition, the influence of CO2 removal method and technological process on energy consumption is discussed. At the same time, the operating parameters (raw gas temperature, raw gas treatment load, lean liquid flow rate of MDEA, plate number of absorber, pressure of absorber, temperature of absorber, etc. The influence of regeneration tower plate number on the energy consumption of CO2 was studied. Through single factor experiments, the key operating parameters of CO2 removal from natural gas by activated MDEA solution (raw gas temperature, raw gas treatment load, MDEA lean liquid flow rate, absorption tower pressure, absorption tower temperature, etc.) were determined. Regeneration tower plate number) and optimization interval. Finally, the experimental scheme was designed by response surface method, and the optimum process parameters were obtained through the analysis of experimental results: raw gas temperature 25 鈩，
本文编号：2327362
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