小型撬装LNG装置的研究与开发

发布时间：2018-04-18 20:42

本文选题：LNG + 液化工艺　；参考：《西安石油大学》2016年硕士论文

【摘要】：天然气液化技术在国内外越来越受到重视,液化天然气工业必然会进入一个迅速发展的时期。进行天然气液化流程的理论分析,对分析和设计流程具有重要的意义。根据我国的具体情况,中、小型的撬装型LNG装置无疑具有较大的优势。小型LNG装置因其具有体积小、开停灵活、转移方便、便于撬装的优势而备受关注。在小型LNG装置的研究状况进行扼要分析比较的基础上,对天然气气液相平衡的计算方法进行了一定的分析探讨:主要包括气液相平衡计算和焓、熵计算;对三种代表性的液化流程进行了分析,并对选定的单级混合制冷剂天然气液化流程用Aspen Hysys进行物料和能量的衡算,在稳态的模拟情况下对流程中压缩机功耗进行分析。研究分析得到以下结论:在稳态模拟中随着压缩机出口压力的升高,压缩机功耗的功耗也随之升高。在稳态模拟中随着天然气压力的升高,压缩机功耗随之降低,天然气压力的升高有利于减少压缩机功耗。在稳态模拟中天然气进口温度越低,压缩机相应的功耗也就越小,天然气温度的降低对减少天然气功耗有积极作用。水冷器后制冷剂的温度越低,相应压缩机功耗也就越小。
[Abstract]:Natural gas liquefaction technology has been paid more and more attention at home and abroad. The liquefied natural gas industry is bound to enter a period of rapid development.Theoretical analysis of natural gas liquefaction process is of great significance to analysis and design of natural gas liquefaction process.According to the concrete situation of our country, the small scale pry type LNG device undoubtedly has the big superiority.Small LNG device has attracted much attention because of its advantages of small size, flexible opening and stopping, convenient transfer and easy prying.Based on the brief analysis and comparison of the research situation of the small LNG plant, the calculation method of gas-liquid phase equilibrium of natural gas is analyzed and discussed to a certain extent: the calculation of gas-liquid phase equilibrium and the calculation of enthalpy and entropy are mainly included;Three representative liquefaction processes are analyzed, and Aspen Hysys is used to calculate the material and energy of the selected single-stage mixed refrigerant natural gas liquefaction process. The compressor power consumption is analyzed under steady state simulation.The conclusions are as follows: in steady state simulation, the power consumption of compressor increases with the increase of compressor outlet pressure.In steady-state simulation, the compressor power consumption decreases with the increase of natural gas pressure, and the increase of natural gas pressure is helpful to reduce compressor power consumption.In steady-state simulation, the lower the inlet temperature of natural gas, the smaller the power consumption of compressor, and the lower the temperature of natural gas has a positive effect on reducing the power consumption of natural gas.The lower the refrigerant temperature behind the water cooler, the smaller the power consumption of the compressor.
【学位授予单位】：西安石油大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TE972

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