Electric desalting dewatering device for crude oil

Abstract

The present invention is one electric raw oil desalting and dewatering apparatus for petrochemical industry. The present invention features the direct material feeding under strong electric field and the horizontal flow of raw oil. The electric raw oil desalting and dewatering apparatus has a tank with oil-water mixture inlet, axial strong electric field coagulation area with at least two layers of parallel planar electrode plates perpendicular to the axis of the tank, purified raw oil outlet with oil outlet pipe, material distributor inside the tank with nozzles to jet oil-water mixture into the strong electric fields between every two adjacent electrode plates, and depositing separation area set between the strong electric field coagulation area and the purified raw oil outlet.

Description

[0001] This application is a divisional application of a patent application with an original application date of July 18, 2003, an original application number of 03126263.5, and an original invention title of "a crude oil electric desalination and dehydration device". technical field [0002] The invention relates to a crude oil electric desalination and dehydration equipment used in the petrochemical industry. Background technique [0003] Chinese patent CN2159833Y discloses a squirrel-cage electrode assembly and an electric desalination and dehydration device and process for horizontal flow of crude oil. The oil-water mixture enters the tank from the oil-water mixture inlet of the electric desalination dehydrator tank, flows horizontally through the distribution plate, and passes through the weak electric field area, transitional electric field area and strong electric field area in sequence. The coalesced water droplets settle to the bottom of the tank in a parabolic traj...

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Problems solved by technology

[0008] The present invention is mainly used to simultaneously solve the following technical problems in the various existing crude oil electric desalination and dehydration devices: the oil-water mixture sequentially passes through the weak electric field region, the transition electric field region and the strong electric field region to make the electric coalescence of the strong electric field region The effect is weakened, which affects and reduces the efficiency of electric desalination and dehydration of crude oil; the crude oil in the tank of the electric desalination dehydrator flows from bottom to top, thereby retarding the settlement of water droplets in crude oil and reducing the efficiency of oil-water separation; using a strong electric field to directly feed multi-stage Electric desalination and dehydration equipment, there are back-mixing of oil-water mixtures with different salt and water contents between the electric fields at all levels; electric desalination and dehydration devices using squirrel-cage electrode assemblies or electrode assemblies with multi-layer electrodes with circular cross-sections, The radial distribution of the electric field intensity of the formed annular electric field is uneven, which affects the effect of electric desalination and dehydration of crude oil, and the power consumption is high

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