Crude oil desalting method and device using rotational flow breakaway technology

A cyclone separation and crude oil technology, which is applied to cyclone devices, devices whose axial direction of cyclone remains unchanged, and refining by centrifugal force, etc. To solve the problems of large land and other problems, it can achieve the effect of easy implementation, simple structure and overcoming high energy consumption.

Inactive Publication Date: 2005-09-21
EAST CHINA UNIV OF SCI & TECH
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Problems solved by technology

The primary technical problem to be solved by the present invention is to overcome the disadvantages of existing electric desalting equipment, such as large energy consumption, large occupation of land, centrifugation, filtration, and complicated desalting operations of DC electric swirling, and provide a new technology for crude oil desalting

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  • Crude oil desalting method and device using rotational flow breakaway technology
  • Crude oil desalting method and device using rotational flow breakaway technology
  • Crude oil desalting method and device using rotational flow breakaway technology

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specific Embodiment approach 2

[0039] When the salt content at the inlet of the crude oil cyclone desalter is greater than 8mg / L, a secondary cyclone desalter device is used, and the process flow is shown in the attached figure 2. Utilize the primary cyclone desalter (2-1) to separate the crude oil into oil phase and oily sewage; the oily sewage enters the settling tank (3-3) to separate into sewage oil and salty sewage, and the sewage oil is discharged into the sewage tank, containing The salt water is discharged; the separated oil phase is injected into water and demulsifier and enters the secondary cyclone desalter (2-2), and then separated into oil phase and oily sewage by cyclone, and the oil phase enters the settling tank (3-1 ), the settled crude oil enters the downstream device, the oily sewage and the oily sewage from the secondary cyclone desalter (2-2) enter the settling tank (3-2) together, and the settled dirty oil is discharged into the dirty oil tank , the saline sewage is reinjected into t...

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Abstract

The invention relates to a method and device for removing salts in crude oil by using cyclone technology, which is characterized in that crude oil injected with water and demulsifier is separated into oil phase and For oily sewage, the oil phase is settled and separated by the settling tank, and enters the downstream device; the oily sewage is settled and separated into dirty oil and salty sewage by the settling tank, the dirty oil enters the dirty oil tank, and the salty sewage is discharged. One-stage, two-stage or multi-stage cyclone desalting devices can be determined according to the actual salt content of crude oil and the required separation effect. The device can reduce the salt content of crude oil to less than 3mg / L, and the water content in the oil can be reduced to 0.1% (volume ratio), which can replace the traditional thermochemical sedimentation dehydrator and electric dehydrator, and is suitable for popularization and use in the petrochemical industry .

Description

technical field [0001] The invention relates to a method and a device for removing salts in crude oil by cyclone technology, which can be widely used in the field of petroleum refining. Background technique [0002] Crude oil contains salts and impurities, which have adverse effects on crude oil processing, equipment and products, and desalination is required before refining. With the development of secondary processing technology in recent years, more specific requirements have been put forward for the salt content of crude oil after desalination: for the purpose of anti-corrosion, the salt content of crude oil after desalination must not exceed 5mg / L; The catalyst in the processing process requires deep desalination. The salt content of the desalted crude oil is not more than 3mg / L, and the water content is not more than 0.3% (volume ratio). [0003] Industrial devices usually use electrostatic desalination methods or chemical desalination methods. Although the use of ele...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B04C3/00C10G31/10
Inventor 汪华林白志山王建文
Owner EAST CHINA UNIV OF SCI & TECH
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