A method based on changing the relative dielectric constant of oil to promote the coalescence of emulsified oil droplets

Abstract

The invention relates to a method for promoting coalescence of emulsified oil droplets base on changing a relative dielectric constant of oil, which comprises the following steps: 1) according to a nonlinear vibration dynamic model of oil-coated water-type emulsified oil droplets in a pulse electric field, a droplet deformation vibration amplitude function shown in the description is obtained; 2)analysis is performed according to the function formula: the droplet deformation vibration amplitude is proportional to the relative dielectric constant epsilon 2 of the oil, which shows that the droplet deformation vibration amplitude in the pulse electric field increases with the increase of the relative dielectric constant of the oil; 3) the relative dielectric constant of the oil-coated water-type emulsified oil is increased before applying a pulse electric field to the oil-coated water-type emulsified oil for demulsification and dehydration; 4) carrying out demulsification and dehydrationon the oil-coated water-type emulsified oil by using a pulse electric field method. According to the invention, the junction poly-increasing speed of the particle diameter of the oil-coated water-type emulsified oil droplet can be further accelerated on the basis of the existing pulse electric field demulsification, and the demulsifiction and dehydration efficiency can be improved without the addition of new equipment facilities; the function formula provides theoretical support and increases the feasibility.

Description

technical field [0001] The invention belongs to the technical field of physical measurement and testing, and in particular relates to a method for promoting the coalescence of emulsified oil droplets based on changing the relative dielectric constant of oil. Background technique [0002] At present, the method of electric field demulsification and dehydration and related technologies are widely used in W / O (water-in-oil) emulsion demulsification and dehydration purification treatment. According to the research status at home and abroad, the pulsed electric field method is a new method of demulsification and dehydration. It is based on the fact that the emulsified droplets in the oil are generally tiny water droplets, which are polar media, while oil is a non-polar medium. The droplet will be polarized, and the principle of the electric field force generated by the external electric field on the polarized droplet can cause the droplet phase in the oil to undergo periodic stre...

AI Technical Summary

Problems solved by technology

Among them, the high-voltage unidirectional pulsed square wave electric field has attracted much attention due to its advantages of high instantaneous voltage, simple structure, and avoiding short circuit. , High efficiency, occupies an important position in the field of electric field demulsification technology, but the investment in corresponding equipment and facilities is also relatively high

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