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Electric dewatering apparatus for crude oil

An electric dehydrator, crude oil technology, applied in the direction of electricity/magnetic dehydration/demulsification, etc., can solve the problems of crude oil dehydration difficult to meet requirements, overcurrent tripping, destroying process operation, etc., to achieve smooth operation, avoid overcurrent tripping, Effect of stable operating process

Inactive Publication Date: 2002-12-25
CHINA PETROCHEMICAL CORP +1
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AI Technical Summary

Problems solved by technology

Using a good metal conductor as the electrode of the crude oil electric dehydrator can well meet the needs of crude oil dehydration under the condition of normal crude oil properties, but when the conductivity of the crude oil medium is high or the water content increases, such as when the water content is greater than 20%, the supply current will be reduced A sharp increase will easily cause over-current tripping, damage the process operation, and make it difficult to meet the requirements of crude oil dehydration

Method used

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Examples

Experimental program
Comparison scheme
Effect test

experiment example

[0008] Add 20ml of crude oil containing 5%, 10%, 20%, 30%, 50%, 70% or 90% of water into a 20ml glass test tube, then add 30ppm of LY-AB demulsifier, mix well, and put it in a constant temperature water bath , the constant temperature is 50°C, insert two semiconductor electrodes or metal electrodes with semiconductor coating in the test tube, the distance between the electrodes is 1CM, after the temperature is constant, apply an 800V / CM electric field for 6 minutes, settle for 24 minutes under constant temperature conditions, oil and water layer, analyze the water content of the oil layer, and end the test. By dehydrating the above-mentioned crude oils with different water contents, it was analyzed that the water content of the crude oils after dehydration was all less than 2%, and there was no overcurrent trip phenomenon during the dehydration process.

[0009] Repeat the above test with a metal electrode. When the water content is 10%, there will be an over-current tripping ...

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Abstract

An electric dewatering device for pretreating high-water crude oil in oil field is characterized by use of semiconductor electrode or the metal electrode coated with semiconductor layer for preventing the over-current caused by the high electric conductivity of crude oil due to high water content and the over-drop of voltage. Its advantages are high effect on removing water and salt, and saving electric energy by 50%.

Description

technical field [0001] The invention relates to a crude oil electric dehydrator, which is suitable for dehydration of crude oil in oil field and desalination and dehydration of crude oil in refinery. Background technique [0002] In the prior art, the crude oil electric dehydrator includes a tank body and a metal electrode arranged in the tank body, and the water-containing crude oil passes through the electric field area generated by the electrode, so that the water in the crude oil is electrocoagulated, and finally the oil and water are separated. The technical improvement of the crude oil electric dehydrator focuses on the shape and setting of the electrodes, and the electrode materials are all metals with good conductors, such as Chinese patents 96224362.0, 98207272.4 and 00125911.3. In the electric dehydrator disclosed in US Pat. No. 4,252,631, a layer of hydrophilic cellulose material is coated on the surface of the metal electrode, and the electrode is still a metal g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G33/02
Inventor 李根照戴琳李建留
Owner CHINA PETROCHEMICAL CORP
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