| With the aggravating trend of heavier and deteriorated of the crude oil, the electric desalting wastewater containing over-standard oil has become a pressing problem for refining industry. To solve this problem, a new process of oil removal based on centrifugal extraction separator is designed and an industrial sidetrack tester was set up. The effects of rotor speed, inlet flow rate, temperature and oil content on oil removal efficiency were studied. The oil content in purified wastewater can keep below550mg/L and the oil removal efficiency can keep above95%at optimized operating conditions. The separated waste oil can be fed into the primary tower.The water-air two-phase flow in the φ50mm rotor was simulated with RSM model and SST model respectively. The volume distribution, pressure distribution and velocity distribution were analysed. The results of the RSM model are more close to the PIV results.The water-air two-phase flows in the rotor at different rotor speeds and flow rates were simulated with RSM model. The rotor speed has great influence on the water-air two-phase flow, while the flow rate has less influence. When the rotor speed was raised from1000r/min to2000r/min, with the increase of the rotor speed, the water volume in the rotor decreased, the negative pressure in rotor decreased, the positive pressuer in rotor increased, the velocity of water increased and the water-air interface moved towards the rotor wall. |
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