| At present,natural gas,liquefied petroleum gas and diesel as the main clean fuels are widely used in China and some developed countries.However,natural gas and liquefied petroleum gas are both chemical raw materials with a certain reserve,and the added value after deep processing is very high,so there is no good substitute for resources,so they can only be burned as ordinary fuel.In the process of oil and gas field exploitation,by-products consisting of C4,C5 and C6 have appeared.This part of hydrocarbon has become light hydrocarbon.This part of by-product can get light hydrocarbon gas through gasification and air mixing.Light hydrocarbons not only have large reserves,but also have high calorific value after gasification.Safe and pollution-free civil and industrial gas can be produced by reasonable technical means,which can replace natural gas and liquefied petroleum gas as a new supplementary gas source.Firstly,the light hydrocarbon market is analyzed,and the utilization and development of light hydrocarbon energy by domestic and foreign scholars are shown.The foreign scholars mainly focus on the refined distillation and extraction,the purification and theoretical research of C4 and C5 are more comprehensive,and the application of research is less.Domestic scholars have analyzed the light hydrocarbon gas formed after gasification of light hydrocarbons before 2000,which has laid a certain foundation for the application of gas.Secondly,the physical parameters of light hydrocarbon oil suitable for gasification to produce light hydrocarbon gas are analyzed and described,and the gasification process of light hydrocarbon from liquid to gas is analyzed theoretically,which provides technical support for the design and optimization of light hydrocarbon gas production equipment.The application market of mixed air light hydrocarbon gas was investigated and analyzed,and the heat transfer theory analysis and heat transfer improvement design of light hydrocarbon gas boiler were carried out.Then,the gas making equipment and process of light hydrocarbon gas are introduced,and the gasification process is simulated by Aspen Plus software.Byanalyzing the technical parameters such as mixing-air ratio,calorific value,pressure and dew point temperature,the influence of mixing-air ratio on calorific value and the influence of mixing-air ratio and pressure change on dew point temperature are explored.Then the light hydrocarbon gas supply system is introduced,including gas stations,transportation and distribution,and feasibility study is carried out.The operation of the whole light hydrocarbon supply system under automatic control is also analyzed.Finally,the load of Shentou village residential buildings in Shexian County of Handan City is calculated by DeST simulation software,and the total heat load of villagers in heating season is obtained.The economic analysis and comparison of light hydrocarbon gas,natural gas and electricity heating are made.The conclusions drawn in this paper will provide technical and economic basis for light hydrocarbon as a supplementary gas source which can replace natural gas and liquefied petroleum gas,and have certain significance for the development and popularization of light hydrocarbon gas. |
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