Effect and mechanism of ultrasonic demulsification of petroleum

1. Oil containing water in ultrasonic oil demulsification is a common phenomenon in the development of oil and gas fields, and water containing crude oil must be dehydrated and desalted before processing. Ultrasonic oil demulsification is a new demulsification method that can effectively solve such problems.

2, ultrasonic wave is a kind of elastic mechanical wave propagating in the medium, with mechanical vibration, cavitation and thermal action. The sound of ultrasonic crude oil demulsification must be below the cavitation threshold.

3, therefore, ultrasonic crude oil demulsification is mainly the use of ultrasonic mechanical vibration and thermal action.

4, ultrasonic wave is a kind of elastic mechanical wave propagating in the medium, with mechanical vibration, cavitation and thermal action. Theoretical derivation and visualization experiment prove that the sound of ultrasonic demulsification must be below the threshold of cavitation. Therefore, ultrasonic demulsification of crude oil mainly uses ultrasonic mechanical vibration and thermal action.

5, vibration effect to promote the condensation of water "particles". When the ultrasonic wave passes through the crude oil medium with suspended water "particles", it causes the suspended water "particles" to vibrate with the crude oil. Because the water "particles" of different sizes have different relative vibration speeds, the water "particles" will collide with each other and bond, making the volume and mass of the particles increase, and then settling and separating.

6, the vibration effect can make the paraffin, gum, asphalt and other natural emulsifiers in crude oil dispersed evenly, increase its solubility, reduce the mechanical degree of the oil-water interface film, is conducive to the settlement and separation of water phase. Thermal action reduces the degree of oil - water interfacial film and oil viscosity.

7. On the one hand: boundary friction increases the temperature at the oil-water boundary, which is conducive to the fracture of the interface film.

8, on the other hand: crude oil absorbs part of the acoustic energy into heat energy, can reduce the viscosity of crude oil, is conducive to the water "particles" of oil and water gravity settlement separation. Summary: The role of ultrasonic oil demulsification and mechanism of small make up to share this, after reading this article you should have a basic understanding and understanding I believe we all understand it! Overall, I hope it was helpful.