Abstract
This study is aimed at carrying out investigations on a domestic gas field, located in Yanchang, China, with a view to optimize the natural gas purification process. The main objectives of this work are (i) to reduce the natural gas purification system’s energy consumption and (ii) improve the existing purification levels. Process simulations were carried out using Aspen Plus™ software, and a comprehensive technical and economic analysis was carried out. The single-factor sensitivity analysis method was used to determine the parameters of absorption, such as the reflux ratio and number of stages. The heat transfer process was analyzed using the energy-saving method of the energy system, and a modified process was recommended. The optimization results show that the recommended system has better purification performance, the comprehensive energy consumption is effectively reduced, and the energy efficiency is improved by 9%.
Highlights
To promote a healthy, sustainable, and stable development of our national economy, the energy requirements of highenergy-consuming systems should be reduced
Based on a summary of the optimization schemes employed in the previous works, a multidimensional optimization and a comprehensive and systematic analysis of natural gas purification systems have been conducted in this study from the perspectives of process and technology
This study was conducted at the Yanchang gas field in China
Summary
Sustainable, and stable development of our national economy, the energy requirements of highenergy-consuming systems should be reduced. In the field of natural gas purification, high-energy consumption and complex processes are widely prevalent [1], which makes it a potential candidate for carrying out an energy-saving analysis and reducing the energy consumption. Based on a summary of the optimization schemes employed in the previous works, a multidimensional optimization and a comprehensive and systematic analysis of natural gas purification systems have been conducted in this study from the perspectives of process and technology. The second step involved the improvement of the deacidification process, for which there were two options, the poor/rich liquid circulation system and the semipoor liquid circulation system. The final step involved the optimization of the heat exchanger network from the perspective of exergy analysis, which improves energy efficiency and saves energy
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