| In recent years,the rapid development of china's aviation industry has driven the growth of the aviation kerosene's demand and consumption.According to statistics,in 2020,China's aviation demand will reach 40 million tons.However,sewage in aviation kerosene mainly come from shipping transportation process,if the sewage discharged directly without any treatment,it will cause serious environmental pollution and tremendous waste of resources.Thusly,techniques of gravity separation and coalescence are combined to design and manufacture the corrugated board oil-water separator,and the optimal design are conducted for the interior components.Aiming at the treatment of sewage with aviation kerosene,series of experiments and simulation research are carried out to provide a theoretical basis for the further development of a compact and efficient oil-water separator.Initially,a static experimental analysis was carried out for the properties of separation of corrugated board.The experimental results showed that the addition of corrugated board can accelerate the oil-water two phase separation and improve the efficiency of oil and water separation;the lipophilic polypropylene material has better oil and water separation characteristics than the hydrophilic stainless steel material.Secondly,a dynamic experimental analysis was carried out for the properties of separation of corrugated board showed that by methods of improving inlet oil concentration,reducing the inlet flow rate and increasing the length of the board,reducing the plate spacing,opening oil hole and submerged hole,etc.efficiency of separation can be improved to some extent;the oil-water separation characteristic of 250 Y type corrugated board group are better than those of 350 Y type;the arrangement form of corrugated plate has a certain effect on the oil-water separation efficiency;among which,the orthogonally placed form can provide higher separation efficiency than horizontally and vertically placed form.Furthermore,the effect of residence time of oil phase and water phase on oil-water separation efficiency was conducted.Results showed that there exists an optimum oil-water interface position and where the separation efficiency is the highest;the thickness and inlet oil phase volume fraction in separator has certain influence on oil-water separation efficiency.Finally,the characteristics of oil-water two-phase flow in the separator were studied by experiment and simulation.Results showed that,there exists a certain degree of turbulence and back mixing phenomenon at the entrance region;while turbulent extent get significantly improved after the liquid distributor;in the calescence region,irregular flow path of corrugated board increase the possibility of oil droplets collision,fluid showed irregular movement;in separation region,the flow is relatively stable;the separation efficiency of separator is influenced by the diameter of oil droplets,when the oil droplet diameter is less than 40?m,it is hard to achieve separation process.And the size of the corrugated board's hole should be chosen according to the main particle size of the oil droplets.In the practical industrial application,the structure of the separator should be optimized according to the characteristics of the oil properties and the requirements of technologies,proper material and structure of corrugated board should be chosen to meet the requirements of separation indexes. |
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