Crude oil electric desalting dewatering process
A technology for electrical desalination and dehydration, crude oil, applied in the field of ultrasonic and pulse removal of salt and water in hydrocarbon oil, can solve the problems of high electric field strength, easy to produce emulsification, unable to handle low-quality high-density crude oil, etc., to enhance the mixing effect , Improve the oil-water separation efficiency, the effect of fast oil-water separation
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[0020] Example 1
[0021] The density of crude oil is 934.1Kg / m 3 , Water content is 0.05%, salt content is 132.6mgNaCl / L, demulsifier is water-soluble ERI1160, water injection is fresh water PH=7, and desalination temperature is 135℃.
[0022] The dosage of the first-grade desalting and demulsifier is 20μg / g, the water injection is 8%, the frequency is 20kHz after mixing, and the sound intensity is 0.6w / cm 2 Ultrasonic for 1 minute, plus electric field strength 800V / cm, duty ratio 50%, pulse frequency 100Hz pulse electric field for 40 minutes; the amount of secondary desalting demulsifier added is 10μg / g, water injection is 6%, and the frequency is 20kHz after mixing , The sound intensity is 0.6w / cm 2 Ultrasonic for 1 minute, then add electric field strength 800V / cm, duty ratio 50%, pulse frequency 100Hz pulse electric field for 40 minutes; three-stage desalting and demulsifier adding amount is 10μg / g, water injection is 5%, and the frequency is 20kHz after mixing , The sound int...
Example Embodiment
[0025] Example 2
[0026] The density of a certain crude oil is 934.1Kg / m 3 , Water content is 0.05%, salt content is 132.6mgNaCl / L, demulsifier is water-soluble ERI1160, water injection is fresh water PH=7, and desalination temperature is 135℃.
[0027] The dosage of the first-level desalting and demulsifier is 15μg / g, the water injection is 8%, the frequency is 20kHz after mixing, and the sound intensity is 0.6w / cm 2 Ultrasonic for 1 minute, plus electric field strength 800V / cm, duty ratio 50%, pulse frequency 100Hz pulse electric field for 40 minutes; the amount of secondary desalting demulsifier added is 8μg / g, water injection is 6%, and the frequency is 20kHz after mixing , The sound intensity is 0.6w / cm 2 Ultrasonic for 1 minute, then add electric field strength 800V / cm, duty ratio 50%, pulse frequency 100Hz pulsed electric field for 40 minutes; three-stage desalting demulsifier adding amount is 5μg / g, water injection is 5%, and the frequency is 20kHz after mixing , The soun...
Example Embodiment
[0030] Example 3 (comparative example)
[0031] The desalination of this embodiment uses a common full impedance transformer to apply an electric field to the crude oil, and compares with the new combined electric desalination technology, mainly comparing the injection amount of the demulsifier, the desalination rate and the power consumption.
[0032] The density of a certain crude oil is 934.1Kg / m 3 , Water content is 0.05%, salt content is 132.6mgNaCl / L, demulsifier is water-soluble ERI1160, water injection is fresh water PH=7, and desalination temperature is 135℃.
[0033] The amount of first-level desalting and demulsifier is 20μg / g, 8% of water is injected, and the electric field strength is 800V / cm AC for 40 minutes after mixing; the amount of second-level desalting and demulsifier is 10μg / g, and 6% of water is injected, and the electric field is applied after mixing. AC power with an intensity of 800V / cm for 40 minutes; the addition of three-stage desalting demulsifier is ...
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