The effects of process conditions such as temperature,emulsion breaker addition,water injection,electric field strength and mixing strength on the electrodesalting effect of crude oil were investigated by a small pilot device of electrodesalting,and the state of crude oil before and after desalting was observed by optical microscopy.The experimental results showed that the optimum operating conditions were 135℃,15 μg·g-1 of emulsion breaker addition,7%of water injection,1150 V·cm-1 and 3 min of electric field strength and action time,respectively,and 350 V·cm-1 and 2 min of weak electric field strength and action time,respectively.The salt mass concentration in the crude oil was 1.9 mg·L-1 after the three-stage electric desalination and dehydration.
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