Numerical Simulation Of Mixing And Heat Transfer Performance Of Static Mixer In Polyester Melt Pipeline

In the polyester processing process,the melt transport process is the most important part of determining melt quality.In order to improve the quality of the melt,it is crucial to solve the problems caused by the melt during the conveying process.In this regard,most companies choose to add a static mixer to the melt transport line to improve the temperature uniformity and mixing uniformity of the melt in the pipeline.However,the results of the static mixer's mixing ability cannot be obtained by direct measurement,and the finite element numerical simulation method can solve the calculation-related problems.In this paper,the finite element numerical simulation method is used to evaluate the mixing performance and heat transfer performance of different types of static mixers.Based on this,the structure of the static mixer was optimized to achieve a more excellent mixing effect and transmission and thermal effect.The first was optimized and reorganized the two types of static mixers and evaluate their mixing performance.The mixing ability of different types of static mixers has been confirmed by simulation results.Simulation results confirm that changes in component structure can have an impact on mixing capabilities,and different types of static mixers have different effects.After combining the two mixer elements,the new static mixer combines the advantages of two static mixers to make up for the shortcomings of the original static mixer,and the mixing performance was more excellent.It makes sense to put forward the combined static mixer to improve the mixing performance of static mixers.Second,considering the use of static mixers as heat exchangers,the heat transfer capabilities of different types of static mixers need to be evaluated.The simulation results of different component structures confirmed that the static mixer with optimized components has stronger heat transfer capability and higher temperature dispersion uniformity.The static mixer combining the two components improves the temperature uniformity of the melt at the exit position and compensates for the shortcomings of the two static mixers.It proves that the combined static mixer has better heat transfer performance.Finally,the process conditions of the combined static mixer were changed to explore the influence of pipe diameter on its mixing and heat transfer performance.By analyzing the variation of mixing and heat transfer performance of static mixers with different pipe diameters,it has been confirmed that excessively increasing pipe diameter will weaken the mixing ability.While appropriate increase of pipe diameter can reduce the weakening of mixing ability while improving the uniformity of melt temperature distribution.This has guiding significance for pipe design and pipe diameter selection of static mixer,and plays an important role in improving melt quality.