Electric desalting equipment and method for crude oil

A technology for electric desalination and crude oil, which is applied in the fields of electric/magnetic dehydration/emulsification, petroleum industry, and hydrocarbon oil treatment. It can solve problems such as electrode short circuit, solve poor stability, solve the effect of electric field effect, and reduce oil content. effect of concentration

Active Publication Date: 2020-03-24
BEIJING INSTITUTE OF PETROCHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the electric field used by most electric desalters in service is still power frequency / high voltage AC electric field, but a large number of engineering operation results so far show that the short circuit between electrodes is very easy to occur when treating high water content emulsion under power frequency / high voltage AC electric field Phenomenon

Method used

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  • Electric desalting equipment and method for crude oil
  • Electric desalting equipment and method for crude oil
  • Electric desalting equipment and method for crude oil

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Effect test

specific Embodiment approach

[0028] The crude oil electric desalting equipment of the present invention, its preferred embodiment is:

[0029] include:

[0030] High-frequency / high-voltage pulsed AC power supply system, electric desalter, floating emulsified oil collector, oil incoming pipeline, oil pumping pipeline, reinjection pipeline, chemical dosing pipeline, heating equipment and compact tubular electric field demulsifier;

[0031] The high-frequency / high-voltage pulsed AC power system is used in conjunction with the electric desalter and the compact tubular electric field demulsifier;

[0032] The incoming oil pipeline is arranged on the upper part of the electric desalter, and is connected to the top distributor in the electric desalter, and a demulsification electrode is arranged below the top distributor;

[0033] The electric desalter consists of an oil phase layer, an emulsion layer, and a water phase layer from top to bottom, and the floating emulsified oil collector is set in the emulsion l...

specific Embodiment

[0060] Such as figure 1 As shown, the crude oil to be treated in the crude oil pipeline 4 and the dilution water in the water injection pipeline 5 are mixed through the static mixer 8 and the mixing valve 9. An appropriate amount of demulsifier is added to the mixed solution, and then the temperature of the mixed solution is moderately raised through the heat exchange device 7 . The mixed liquid is directly distributed to the electric field action area through the top distributor 10, and the demulsification occurs in the electric field area formed between the high voltage electrode 11 and the ground electrode 12 of the electric desalter, and then sedimentation and stratification occur under the action of gravity, from the top From bottom to bottom, it is divided into oil phase layer 1, emulsion layer 2 and water phase layer 3. During the working process of the electric desalter, the emulsion at the oil-water interface is extracted by the floating emulsified oil collector 16, ...

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Abstract

The invention discloses electric desalting equipment and method for crude oil. The electric desalting equipment for crude oil comprises a high-frequency / high-voltage pulse alternating-current power supply system, an electric desalter, a floating emulsified oil collector, an oil incoming pipeline, an oil pumping pipeline, a reinjection pipeline, a dosing pipeline, heating equipment and a compact tubular electric field emulsion breaker, wherein the oil incoming pipeline is arranged at the upper part of the electric desalter, and the floating emulsified oil collector is arranged in an emulsifiedliquid layer and is connected with a bottom inlet of the compact tubular electric field emulsion breaker; and a top outlet of the compact tubular electric field emulsion breaker is connected with thebottom of the electric desalter. According to the invention, crude oil desalting efficiency can be effectively improved; the problems that a conventional electric desalter is poor in operation stability and not obvious in electric field effect are solved; an inevitable oil-water emulsifying layer in an electric desalting tank can be accurately extracted and fully demulsified and then reinjected, so it is guaranteed that the quality of crude oil at the outlet reaches the standard, the oil content of electric desalting cut water is reduced, and chemical cost and heating cost can be greatly reduced.

Description

technical field [0001] The invention relates to a crude oil electric desalting technology, in particular to a crude oil electric desalting equipment and method, which are used to remove the water phase and salt substances in the crude oil, so that the crude oil meets the export sales standards in the mine or meets the requirements in the refinery workshop. Relevant requirements of subsequent processing standards. Background technique [0002] Crude oil extracted from the formation often contains a certain amount of water and inorganic salts, so dehydration (salt) operation of crude oil is required in oilfields and mines, so that the exported crude oil meets the requirements of water content ≤ 0.5%, salt content ≤50mg / L and other standard requirements. At the same time, in order to avoid a series of problems such as corrosion of equipment and pipelines and catalyst poisoning in the process of crude oil refining and processing, oil refining companies have stricter requirement...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G53/02C10G33/02
CPCC10G33/02C10G53/02C10G2300/202C10G2300/205
Inventor 陈家庆董建宇石熠姬宜朋黄松涛刘帆白春禄
Owner BEIJING INSTITUTE OF PETROCHEMICAL TECHNOLOGY
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