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Crude oil electric desalting process

An electric desalination and crude oil technology, which is applied in the petroleum industry, electric/magnetic dehydration/emulsification, and hydrocarbon oil treatment, can solve the problems of high power consumption, long crude oil residence time, poor running stability, etc., and achieve power saving , save the residence time, the effect of smooth operation

Inactive Publication Date: 2015-03-18
LUOYANG PETROCHEMICAL ENG CORP SINOPEC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a crude oil electric desalting process to meet the desalination and dehydration purpose of oil fields and refineries under the condition of meeting the desalination and dehydration purposes of oil fields and refineries, and can Make the operation smooth, the crude oil stays in the electric field for a short time and save electricity

Method used

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  • Crude oil electric desalting process
  • Crude oil electric desalting process
  • Crude oil electric desalting process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] as attached figure 1 , using a first-stage electric desalination process, a pipeline demulsifier 5. Crude oil desalting process is as follows: raw material oil 1 enters heat exchanger 3 through crude oil pump 2 for heat exchange to about 100-160 °C, demulsifier and washing water 8 are mixed with heat exchanged raw material oil through mixing equipment 4, so that The washing water is dispersed in the crude oil to form water droplets with a diameter of about 10 microns, and through contact with the salt in the crude oil, the salt in the crude oil is dissolved in the washing water, and the mixed crude oil enters the upper part of the pipeline type demulsifier 5, and the transformer 9 Supply power to the internal electrodes of pipeline-type demulsifier 5 to form a high-voltage electrostatic field for demulsification treatment. The diameter of water droplets in the emulsion after demulsification increases from 10 microns to about 100-300 microns, and the demulsified crude oi...

Embodiment 2

[0034] as attached figure 2 , using a first-stage electric desalination process, two pipeline demulsifiers 5. Crude oil desalination process is as follows: raw oil 1 enters heat exchanger 3 through crude oil pump 2 for heat exchange to about 100-160°C, demulsifier and washing water 8 are mixed with heat exchanged raw oil through mixing equipment 4, mixed The final crude oil enters the upper part of the first pipeline-type demulsifier 5, and the transformer 9 supplies power to the internal electrodes of the first pipeline-type demulsifier 5 to form a high-voltage electrostatic field to perform a demulsification treatment. The bottom of one demulsifier 5 flows out and then enters the upper part of the second pipeline demulsifier, and the transformer 9 supplies power to the internal electrodes of the second pipeline demulsifier 5 to form a high-voltage electrostatic field for secondary demulsification treatment. The crude oil after the first demulsification flows out from the b...

Embodiment 3

[0038] as attached image 3 , a two-stage electric desalination process is adopted, and a pipeline type demulsifier 5 is used in each electric desalination process. Crude oil desalting process is as follows: raw material oil 1 passes through crude oil pump 2 and enters heat exchanger 3 for heat exchange to about 100-160°C, and then enters the first stage electric desalting process, that is, demulsifier and washing water 8 and raw material after heat exchange The oil is mixed through the mixing equipment 4, and the mixed crude oil enters the upper part of the pipeline-type demulsifier 5, and the transformer 9 supplies power to the internal electrodes of the pipeline-type demulsifier 5 to form a high-voltage electrostatic field. The crude oil flows out from the bottom of the pipeline type demulsifier 5 and then enters the bottom of the settling tank 6, where oil-water separation is carried out in the settling tank 6, the separated water 7 flows out from the bottom of the settlin...

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Abstract

The invention discloses a crude oil electric desalting process, which overcomes the disadvantages of long retention time, large electricity consumption, and poor operation stability for crude oil in an electric field in the prior art. The process comprises: allowing crude oil to enter a device through a crude oil pump, heating to 100-160 DEG C, and then performing at least one stage of desalting process; each stage of desalting process comprises: mixing the crude oil with washing water and a demulsifier in a mixing apparatus, allowing the mixture to enter at least one tubular demulsification device for demulsification, allowing the demulsified crude oil to enter the bottom of a settling tank, performing oil-water separation in the settling tank, allowing the separated crude oil to flow out from the upper part of the settling tank or to enter the next stage of desalting process, wherein the tubular demulsification device is connected with a transformer, the electric field intensity of each tubular demulsification device is 1500-3000 V / cm, and the electric field action time is 5-30 S.

Description

technical field [0001] The invention belongs to the field of petrochemical industry, and relates to a process for desalting and dehydrating water-containing oil materials in oil fields and refineries. Background technique [0002] Electric desalination and dehydration of crude oil is the first step to improve the long-term operation of refining and chemical equipment. It can effectively reduce NaCl, CaCl 2 , MgCl 2 Such as inorganic salts, corrosive substances dissolved in water (some organic acids, sulfur) and water content, and at the same time protect the catalyst activity in the subsequent process, which is an important process in crude oil processing. [0003] The crude oil electric desalting process is to inject appropriate water into the crude oil to dissolve the salts in the crude oil, inject a demulsifier to chemically demulsify the oil-water emulsion, enter the electric desalting device, and further destroy it under the action of a certain electric field and a cer...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G32/02
CPCC10G32/02C10G33/02C10G33/04C10G2300/201C10G2300/80
Inventor 刘家国崔新安汪实彬袁海欣申明周刘英
Owner LUOYANG PETROCHEMICAL ENG CORP SINOPEC
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