Dissertation > Industrial Technology > Chemical Industry > Non-metallic elements and their inorganic compounds, the chemical industry > Oxygen > Peroxide

The CFD Simulation of Liquid-Liquid Flow Field of Sieve Tray Extraction Column for Production of Hydrogen Peroxide by Anthraquinone Process

Author LiuHuiBin
Tutor XuSongLin
School Tianjin University
Course Chemical Engineering
Keywords Anthraquinone Hydrogen peroxide Sieve plate extraction column Liquid-liquid extraction Injection Sieve CFD simulations
CLC TQ123.6
Type Master's thesis
Year 2007
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Sieve plate liquid-liquid extraction column is one of the important equipment the anthraquinone method of hydrogen peroxide production , although it has been used for many years , but the research and application of it is very scarce . The subject on the basis of previous research work on the sieve the extraction tower sieve liquid Flow Field simulation studies and sieve pore structure to improve simulation selected scene working fluid as mimics Department , so the subject of the research on the design of theoretical research and sieve sieve plate extraction column of fluid dynamics has a certain significance . Solving software subject to commercial software FLUENT , GAMBIT pre-processor , Laminar model and VOF multiphase flow model , generate and optimize the subjects using two-dimensional grid , using both experimental and literature data model do the analysis of the turn -depth study of the simulation of three different height to diameter ratio mesh sieve and improved flow field . Subject assuming the initial moment of the continuous phase is still , and single-hole as the research object . By examining sieve ago speed distribution, the velocity distribution of the cross section within the jet column injector column surface velocity changes in the axial position , stability curves and droplet diameter with the average velocity variation of sieve export of different height to diameter than sieve sieve internal and jet column flow field , and then design improved the sieve , and its the same investigation to prove its advantages . The results of the analysis of the effectiveness of the model showed , subject the model to be able to more accurately simulate the study Mixture , and the following conclusions : the sieve diameter and height increase can be weakened the sieve internal radial velocity fluctuations , thereby enabling the formation of injection column cross-section adjacent points speed difference is reduced so that the surface speed of the jet column fluctuations become even improve the stability of the jet column . Improved sieve strengthened the sieve internal radial movement of the fluid particles , so that the growth rate and wavelength of the disturbance wave is reduced , so that the ejection column length increases , the droplet diameter is reduced , increasing the sieve plate extraction column ( s ) in the two phases contact area, to enhance the interphase mass transfer .

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