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Study on the Process of Decentralized Heating of Batch Stripping Distillation

Author: BiWei
Tutor: BaiPeng
School: Tianjin University
Course: Pharmaceutical Engineering
Keywords: Intermittent stripping Tower decentralized heating Heat-sensitive materials Simulation
CLC: TQ028.31
Type: Master's thesis
Year: 2007
Downloads: 56
Quote: 2
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Abstract


Now , the heat-sensitive substances is widely encountered in industrial production and daily life of many organic monomer and intermediates , fine chemical products , pharmaceuticals , spices , etc. , have heat-sensitive . Thermal material system itself thermal instability has brought great difficulties to the separation and purification , and therefore , more and more attention has been paid for separation of heat-sensitive substances . This paper presents a new thermal material separation intermittent mode of operation - stripping tower dispersed heated stripping operation . The operation mode on the tower in the distributed heating , it is possible to effectively shorten the heating time of the light components and lighter components in the distillation process , and can effectively reduce the liquid holdup of the tower reactor , will help to shorten the operation time , these advantages is very conducive to the thermal material was separated , Therefore, this method is a useful application of the value of the operating way . This article tower decentralized heating experiments using two different nature of the physical system : n-propanol - isopropyl alcohol and ethanol - acetic acid . The use of n-propanol - isopropanol Mixtures verified preliminarily the decentralized heating mode of operation to shorten the operation time and reduce the liquid holdup on the advantages , and the use of acetic acid - ethanol Mixtures further verified from the reaction conversion dispersed heating operation the the separation of the validity of the heat-sensitive substances . Heating operation simulation of the tower dispersed stripping column into the condenser - save tank , tower , tower kettle a few parts of the material balance and heat balance , combined with two points implicit method and θ correction method , and n-propanol - isopropanol Mixtures simulation and effects of the top of the tower kept tank tower reactor , tower concentration trend throughout the heavies , and with the experimental results comparison. The results show that the simulation results in good agreement with experimental data .

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CLC: > Industrial Technology > Chemical Industry > General issues > Chemical processes ( physical processes and physical and chemical processes ) > Separation process > Single-phase system liquid mixture separation process > Distillation and rectification
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