Novel crude oil emulsion electrostatic dehydrator

Abstract

The invention relates to an electrostatic coalescer with high efficiency, which is a piece of compact equipment for the electrostatic dehydration of crude oil emulsion with high efficiency, and is applied for the crude oil dehydration in the production process of oil fields. The invention is characterized in that: the invention comprises a housing, which comprises a coalescence part arranged vertically and a sedimentation and separation part arranged horizontally; the coalescence part is a vertical cylinder shaped structure with a cylinder shaped electrode assembly arranged inside; the sedimentation and separation part is a horizontal tank structure arranged below a dehydrator, with an emulsion distribution device, a spoiler and a staggered corrugated coalescing plate arranged inside. A high voltage transformer is arranged on the sedimentation and separation part and is connected with the cylinder shaped electrodes by a high voltage insulated cable. The cylinder shaped electrodes are covered by a compact insulation layer which can reduce leakage current and prevent the short circuit among the electrodes. The distance among the cylinder shaped electrodes is small, so a narrow runner is formed, and high strength electric field is formed in the narrow runner. The invention has the advantages that: the crude oil emulsion successively experiences the effects of electrostatic coalescence, staggered corrugated coalescing plate coalescence and the eddy current coalescence of the spoiler; the contained water drops grow bigger; the settling velocity is accelerated, and the rapid separation between crude oil and water is realized.

Description

Technical field: [0001] The invention relates to a high-efficiency compact crude oil emulsion electrostatic dehydration equipment, which can promote the coalescence of water droplets in the water-in-oil emulsion, and separate the free water formed after the coalescence, and is mainly used for oil and gas gathering and transportation systems Crude oil dehydration and refinery electrical desalination. Background technique: [0002] At present, most typical electric dehydrators are horizontal tank structures. The mesh-shaped bare metal electrodes are arranged in layers on the upper part of the tank with a distance of 20-50 cm. Different voltages are applied to adjacent electrodes, forming an electric field between them. After the water-in-oil emulsion enters the tank, it passes through the electrodes from bottom to top. Under the action of the electric field, the water droplets undergo electrophoretic coalescence, dipole coalescence and oscillation coalescence, and the volume...

AI Technical Summary

Problems solved by technology

The electrostatic coalescence part and the settling part of this layout are together, so that the flow direction of the emulsion is opposite to the sinking direction of the water droplets, which increases the settling time of the water droplets and reduces the dehydration efficiency, which is not conducive to the high efficiency and miniaturization of the electric dehydrator. direction of development

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