The invention discloses a device and method for evaluating dynamic demulsification and
dehydration characteristics of a
crude oil emulsion. The device comprises an
emulsion feeding tank,
electric heating devices, a high-speed shearing dispersion
machine, an
emulsion metering pump, a
thermometer, a demulsification box, an emulsion
recovery tank, a
demulsifier feeding tank, a medicament feeding pump, a high-
voltage power supply and an
oscilloscope, wherein the emulsion feeding tank and the emulsion
recovery tank are connected with an inlet of the emulsion
metering pump through a three-way valve; an outlet of the emulsion
metering pump is connected with an inlet of the demulsification box; an outlet of the demulsification box is connected with the emulsion feeding tank and the emulsion
recovery tank through a three-way valve; a front sampling port and a rear sampling port are formed in an inlet pipeline and an outlet pipeline of the demulsification box respectively; the high-
voltage power supply and the
oscilloscope are sequentially connected to apply a high-
voltage electric field to the demulsification box, and the
demulsifier feeding tank and the medicament feeding pump are arranged on the inlet pipeline, in front of the front sampling port, of the demulsification box. The structure is compact, few
crude oil emulsions are consumed, continuous flowing is realized, observation is convenient due to the fact that a box body of the demulsification box is made of a transparent material, and the device and the method can be used for quickly evaluating the dynamic demulsification and
dehydration characteristics of the
crude oil emulsion in a laboratory or a
project site.