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. However

as the bad wastewater quality of oil field

fouling is easily to form in the evaporator. In this paper

water quality and fouling trend of oilfield sewage is analysed

then the heat transfer and mass transfer model of fouling process in heat exchange surface are described during sub-cooled flow boiling and convective heat transfer. At last the crystallization fouling quantity and fouling resistances of wastewater are achieved 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.