The invention relates to the technical field of
crude oil dehydration, and particularly discloses a folded
plate electrode for
crude oil dynamic electrocoalescence
dehydration and an application method thereof. The
electrode comprises an
electrode base material formed by a 304 stainless steel net structure, the base material is folded along the central axis of the base material to form a
folded structure, the folding angle is 18-22 degrees (preferably 20 degrees), the Z-direction projection area is 230mm * 100mm, and the plate spacing is 30mm. During application, the
electrode is mounted in a dynamic coalescence unit, and a high-frequency
pulse electric field is applied to the upper electrode, so that water drops of emulsified
crude oil are directionally migrated, coalesced and settled under the synergistic effect of a non-uniform
electric field formed by the electrode and a gravity field, and high-efficiency
dehydration is realized. By optimizing the folding angle and structural parameters of the electrode, the
electric field gradient is remarkably enhanced, and the droplet migration speed and coalescence efficiency are improved. Experiments show that according to the technology, the dehydration rate can be increased to be larger than or equal to 96%, the unit dehydration
energy consumption can be reduced to be smaller than or equal to 0.85 kW.h.m, the
water content of treated crude oil is smaller than or equal to 0.5%, the
oil content of separated water is smaller than or equal to 5 mg / L, the
critical voltage is reduced by 18% compared with that of a traditional
plate electrode, and the
plate electrode is suitable for the large-flow working condition larger than or equal to 500 mL. Min and has the advantages of being efficient, capable of saving energy, stable in structure and easy to industrially popularize.