Efficient electric desalting and dewatering equipment

Abstract

The invention provides efficient electric desalting and dewatering equipment. The efficient electric desalting and dewatering equipment comprises a tank body, a three-phase power supply and a verticalhanging type electrode plate, wherein the tank body is grounded, an oil inlet pipe, an oil outlet pipe and a drain pipe are arranged on the tank body, and an inlet oil distributor, an outlet oil collector and a backwashing system are arranged in the tank body. After electric desalting, the salt content of crude oil is generally not larger than 3 mg / L, the water content is not larger than 0.2%, the oil content of discharged water is not larger than 150 mg / L, and for crude oil which is large in density and high in impurity content and has difficulty in demulsifying and dehydrating oil-water emulsion, by adopting the scheme, the desalting effect is improved, and the situation that discharged water carries oil can be avoided.

Description

technical field [0001] The invention relates to the field of petrochemical crude oil pretreatment, in particular to a high-efficiency electric desalination and dehydration equipment. Background technique [0002] The metal salt compounds contained in crude oil will cause corrosion of subsequent processing equipment and catalyst poisoning of secondary processing equipment. Therefore, crude oil must first pass through electric desalting equipment to remove the salt contained in it before being processed in the refinery. At present, domestic and foreign oil refineries basically use horizontal electric desalination equipment, and the electrode forms used mainly include horizontal plate electrodes and vertical suspension electrodes. Due to different power supplies, AC electric fields, AC and DC electric fields, pulse electric fields, high-frequency electric fields, etc. can be formed in the electric desalination and dehydration tank. Washing water and crude oil are mixed by a mi...

AI Technical Summary

Problems solved by technology

Since the oil-water mixture is directly sprayed between the two lower electrode plates, it is easy to cause instability of the electric field between the lower electrode plates and affect the desalination and dehydration effect

At the same time, due to the short residence time of the raw materials in the high-speed electric desalination and dehydration equipment, the emulsion at the oil-water interface is not easy to completely demulsify, so that the equipment drains with oil, resulting in waste of resources and environmental pollution

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