The Research And Development Of The LNG Device For Small Lever

Natural gas liquefaction technology has get 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 important for the analysis and design process.According to China's specific conditions,medium and small skid-type LNG plant will undoubtedly have a greater advantage.Because of its small size,flexible and open-stop,easy transfer to facilitate skid,small LNG plant was great concerned.Basic research topics in the situation of small LNG plant will be relatively brief analysis on the calculation method of gas-liquid equilibrium of natural gas,which must be analyzed and discussed: including vapor and liquid equilibrium and enthalpy,entropy calculation.The three representatives of liquefaction processes were analyzed,and selected single-stage mixed refrigerant natural gas liquefaction processes for material and energy was accounted using Aspen Hysys.The compressor power consumption of the process was analyzed under steady-state simulations.This paper analyzes the following conclusions: In the steady state simulation,with the increase of the compressor outlet pressure of the compressor,the power consumption also increased.With the increase in the steady-state simulation of gas pressure,the compressor power consumption decreases,showing the increase of gas pressure compressor helps to reduce power consumption.The lower the steady-state simulation of gas inlet temperature,the smaller the power consumption of the compressor corresponding visible,reducing the temperature of the gas to reduce gas consumption has a positive effect.The lower temperature of the refrigerant in water coolers,the smaller the corresponding compressor power consumption is.