Development And Research Of Gas-Liquid Separation Component In Combined Three-Phase Separator

According to the requirements of gas-liquid separation in combined three-phase separator,this paper presents the development and research on a kind of natural gas coalescence filtration and separation device with one filter components.Experimental studies are carried out using several filter components of different structural parameters to do the researches on resistance characteristics,separation efficiency and droplet diameter distribution of entrance and exit.By studying the gas-liquid two phase flow in benchmark structure with the Fluent software,we get the gas phase flow state,droplet escape rule,and optimized the structure.The result shows that: operating parameters and structural parameters will influence the natural gas coalescent filter on resistance characteristics or separation efficiency.As the filtering area reduces,the pressure drop will increase.When the entrance flow is low,gas-liquid separation efficiency increases with the increase of flow rate.But it will decline rapidly if exceeds the critical flow rate.The influence of droplet diameter on the separation efficiency is significant.The separation efficiency of droplet with median diameter of 8.7?m is significantly higher than that of 40?m.Gas-liquid separation efficiency increases with the increase of liquid concentration of 30~75g/m3.The main reason is the higher liquid concentration,the higher probability of coalescence.Large droplets are easier to be trapped.When the filtering precision is improved from 10?m to 2?m,the separation efficiency will increase,so do the resistance characteristics.The smaller filter component is more suitable for low flow rate.Using the Winner318 B laser particle analyzer to measure droplet diameter,and it is found that there is no droplet larger than 8 ?m at the exit of separator.We get the relationship between the filtering precision and the ultimate separation particle diameter.By using Fluent to simulate the flow field,we find volume go through the filter component is not uniform.67.7% of the volume goes through the upper region of the filter component.By optimizing different entrance structures,the volume of distribution is greatly improved with no increase in energy consumption.