The Comprehensive Analysis And Optimization Of Energy Consumption In High Sour Gas Purification Of Puguang Gas Field

With the gradual development of high sour gas fields in China, the high sour gas purification device plays a more and more important position in the Chinese natural gas industry. For the high sulfur in natural gas, a large proportion of the purification device energy consumption accounts for the entire process of natural gas exploitation.In order to evaluate the purification device of energy utilization and energy saving potential of Puguang natural gas purification plant correctly, this paper has done following works:1. Using purifier ProMax process model, establishing energy consumption evaluation index system of high sulfur purification device, developing to measure method of purification device energy consumption level through consumption factors overall, pointing out that main reasons of high energy consumption:feed gas load, MDEA solution circulation, the steam of amine regenerator reboiler, fuel gas of tail gas incinerator and steam pipe network loss, and put forward for corresponding optimization measures and suggestions, which can make the comprehensive energy consumption reduced by more than 20%.2.At the same time, the exergy analysis method can be used to establish energy consumption model, and using this model to evaluate the energy of high sulfur natural gas purification device. based on datas of the first complex, the exergy loss mainly occurs in the heat transfer process and mass transfer process, and the rate is about 78% and 17% respectively.3.The whole process parameter optimization model is established by the meta modeling and genetic algorithm, which is applied to optimize operation parameters. Take the first complex as example, the result shows the exergy efficiency of the whole process is increased by about 6%, the comprehensive energy consumption is reduced by about 11%, operating cost can be saved by ￥8,520,000 every year.