The Technical Research On MEE Drived By SAGD Waste Heat

According to the principle of thermal desalting, evaporator achieve the recycling of the oilfield sewage and waste heat at oilfield ground. It reduced the consumption of heat and water of steam-injection boiler in heavy reservoir thermal recovery production. Fistly, it introduces the sewage water desalination systems, designs the technological process, establishes the model of mass and energy conservation for MVC, by the simulation analysis of the system’s properties, studies the influence of design parameters, points out advantages and disadvantages of each system; secondly, applying the MVC into the real oilfield ground, calculating the consumption of 7 different systems, at the end achieving the economical system; However, as the bad wastewater quality of oil field, fouling is easily to form in the evaporator. In this paper, we analysis water quality and fouling trend of oilfield sewage, then described the heat transfer and mass transfer model of fouling process in heat exchange surface during sub-cooled flow boiling and convective heat transfer. At last we achieved the crystallization fouling quantity and fouling resistances of wastewater similar to the experimental results during evaporation process. It disclosed the fouling process of oilfield sewage and also important to make sure the safety of oil field water and heat recycling process.