Method and apparatus for high-efficient crude oil desalination / dehydration

A crude oil dehydration and desalination technology, which is applied in the field of petrochemical industry, can solve the problems of electric field collapse, transformer tripping, desalination/dehydration effect deterioration, etc., and achieve the elimination of stabilization effect, reduction of crude oil water content, desalination/dehydration rate and stable operation improvement Effect
CN102226100BInactive Publication Date: 2014-04-30GUANGZHOU BOXENERGY TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
GUANGZHOU BOXENERGY TECH
Publication Date
2014-04-30
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention belongs to the technical field of petrochemical industry, and particularly relates to a method and an apparatus for high-efficient crude oil desalination / dehydration by a combined filtration-electric field coalescence method. The apparatus for high-efficient crude oil desalination / dehydration of the invention comprises a raw material conveying system, a mixing device, a dehydration filtration device, and an electrical desalting device which are connected in order. The method for high-efficient crude oil desalination / dehydration of the invention is realized by using the apparatus for high-efficient crude oil desalination / dehydration of the invention and through the steps of raw material preheating, mixing, preliminary demulsification, and electrical desalination / dehydration. The invention adopts a combined filtration-electric field coalescence method for crude oil desalination / dehydration, which can overcome respective disadvantages of performing desalination / dehydration process by a filtration method or an electric field coalescence method, decrease running severity of both the two methods, not only improves the adaptability of the crude oil desalination process, the desalination / dehydration rate, and the stable running rate, but also reaches the purposes of energy saving and consumption reduction.
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Description

technical field

[0001] The invention belongs to the technical field of petrochemical industry, and in particular relates to a method and equipment for high-efficiency crude oil desalination / dehydration combined by filtration and electric field coalescence method. Background technique

[0002] Crude oil inevitably contains a certain amount of salt and water, and contains trace amounts of heavy metals. The salts are mainly dissolved in the tiny water droplets contained in crude oil in the form of alkali metal and alkaline earth metal hydrochloride, and these water droplets are mostly suspended in the oil phase in the form of "water-in-oil" (W / O) emulsion , particle diameter of 10 ~ 20nm, with high stability. The salt contained in crude oil is the main cause of equipment corrosion and scaling, so the first process of crude oil processing is desalination / dehydration.

[0003] At present, there are more than ten kinds of crude oil desalination / dehydration methods: mechanical me...

Claims

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