Research Of The Influence Of Vertical Separator Dehumidification Efficiency Factors And Structure Optimization

With the deepening of Shuguang oil production plant fire flooding, while produced gas of production wells in the process of delivery to the desulfurization tower through the pipeline contains a lot of water vapor. Exhaust gas recycling pipe network at the end of the desulfurization tower exists the problems of high humidity intake air and high flow rate, which cause the inner wall of the separator erodes severely, low separation efficiency of the separator and desulfurization tower flooding, they will affect the efficiency and safety of fire flooding production. Focusing on the above problems, in this paper, based on the theory of gas-liquid two phase flow, utilizing the numerical simulation software of FLUENT, simulation and analysis the effects of daily capacity, water content and the droplet diameter on the separation efficiency and separated pressure drop. The research shows that with the increase of daily processing capacity, the separation efficiency decreases, when the inlet flow rate less than 10.4 × 104m3/d, the separator outlet water cut may meet the outlet requirements; the larger the amount of liquid in gas, the higher separation efficiency, while the amount of fluid containing more than 3%, the separation efficiency is significantly improved with the increasing of the liquid content. When the liquid water cuts exceeds 5.5 percent, the separation efficiency of separator increases smoothly. However, the high inlet fluid amount will result in the outlet liquid content can’t meet field requirements. Droplet diameter has a great impact on the separation efficiency of the separation zone and the overall separation efficiency of the separator, the larger droplet diameter; the smaller the depth separation zone load and the overall separation efficiency of the separator is also higher. Through the transformation of the separator inlet structure, the erosion of inner wall surface of the gas separator is reduced greatly, and it also can drain the gas and reduce the speed of gas, improving the overall separation efficiency of separator maximum up to 23.7%; pre-separation region and the first separation region obtain more fully utilized, the depth separation zone load is reduced. Water content of desulfurization tower intake also meets the field requirements. The research provides theoretical support for improving gas-liquid separation efficiency during the process of fire flooding in the field and has important guiding value in field applications.