摘要
This paper presents a flexible model and a robust algorithm for simulation of multi-stage multi-component separation processes in which multiple feeds, side streams, strippers and/or side heat exchangers are involved. The improved algorithm effectively accelerates the speed of convergence and offers better stability by introducing a damping factor for updating the stripping factor, and also reduces the requirement on the initial estimates by updating the Joacobian matrix directly with the stripping factor and enthalpy. On the other hand, an efficient algorithm was proposed to solve the approximate tri-diagonal matrix (containing the off-band elements) derived from the material balance equations (M equations) and phase equilibrium equations (E equations), the advantages and simplicity of the “insideout” technique of the Russell are retained. The present algorithm was demonstrated to be effective in simulating complex separation columns with typical case studies.
This paper presents a flexible model and a robust algorithm for simulation of multi-stage multi-component separation processes in which multiple feeds, side streams, strippers and/or side heat exchangers are involved. The improved algorithm effectively accelerates the speed of convergence and offers better stability by introducing a damping factor for updating the stripping factor, and also reduces the requirement on the initial estimates by updating the Joacobian matrix directly with the stripping factor and enthalpy. On the other hand, an efficient algorithm was proposed to solve the approximate tri-diagonal matrix （containing the off-band elements） derived from the material balance equations （M equations） and phase equilibrium equations （E equations）, the advantages and simplicity of the ＂inside-out＂ technique of the Russell are retained. The present algorithm was demonstrated to be effective in simulating complex separation columns with typical case studies,
出处
《过程工程学报》
EI
CAS
CSCD
北大核心
2006年第2期247-254,共8页
The Chinese Journal of Process Engineering
关键词
分离
蒸馏
数值模拟
算法
separation
distillation
multi-component
simulation
algorithm
