一种液－液－汽三相平衡新算法

摘要

A new algorithm for calculating LLV equilibrium based on phase-stability test has been presented.Two ternary systems of methanol/ethylacetate/water and ethanol/ethylacetate/water have been taken as examples to carry out the calculation of the liquid-liquid-vapor three phase flash process.The estimation of the initial values of composition for the two equilibrium liquids by using the principles of the key component is proved effective for the calculation satisfactorily converging to the practical solution.%根据相稳定性判据设计了液-液-汽（LLV）三相平衡的算法。基于关键组分的概念确定两平衡液相组成的初值，液液平衡计算表明算法可靠。对乙醇-乙酸乙酯-水和甲醇-乙酸乙酯-水二个物系进行了LLV三相闪蒸计算，结果表明利用该算法较好地收敛于实际解。