Crude oil dehydration device with ultrasonic wave and electric field and dehydration method

Abstract

The invention discloses a crude oil dehydration device with ultrasonic waves and an electric field and a dehydration method and belongs to the technical field that a high voltage is applied to a dehydration procedure of high-water-content high-viscosity crude oil. The invention aims to solve the problems that high-water-content crude oil cannot be deeply purified or dehydrated after being fed intoan electric dehydrator and secondary emulsification can be easily caused to low-water-content crude oil by ultrasonic waves. The device comprises an emulsification device, a dehydration device and arecycling device which are connected in sequence, wherein the emulsification device comprises an emulsification blending tank; the dehydration device comprises a dehydration tank; a liquid inlet, a water outlet and an oil outlet are formed in the side wall of the dehydration tank; an electrode component is mounted inside the dehydration tank; an ultrasonic component is mounted outside the dehydration tank; the emulsification blending tank is connected with the liquid inlet of the dehydration tank through a pipeline; and the water outlet and the oil outlet of the dehydration tank are respectively connected with a recycling device. By adopting the crude oil dehydration device, the crude oil demulsification dehydration effect can be improved, the dehydration efficiency can be improved, the amount of a demulsifier can be reduced, pollution can be reduced, and in addition, the applicability of the dehydrator to different types of crude oil can be improved.

Description

technical field [0001] A crude oil dehydration device and method, belonging to the technical field of high voltage applied to the dehydration link of high water content and high viscosity crude oil, in particular to a crude oil dehydration device and method with ultrasonic combined electric field. Background technique [0002] In the process of oil production and transportation, due to the wide application of tertiary oil recovery technology and the comprehensive effects of temperature, water, microorganisms, bacteria, etc., the physical and chemical properties of oil have changed to a large extent, and the composition of oil is complex. , contains more macromolecular groups such as asphaltene and colloid, which leads to high viscosity and poor fluidity of crude oil, and the water content of crude oil is as high as 50% to 90% in the middle and late stages of oilfield production. Conventional crude oil is more difficult to process. In addition, due to the limited environment...

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Problems solved by technology

At present, most of the combined stations adopt the method of electric field plus demulsifier, which is the method with the highest efficiency and the strongest processing capacity so far. Although this crude oil treatment process is relatively mature, the following outstanding problems still exist: the crude oil that has been settled in the settling tank The water content is still high, and most of it is emulsified water. After entering the electric dehydrator, the electric field will not be easily established, and a penetrating water chain will be formed between the electrodes to cause breakdown. The dehydration current is large, which will affect the efficient and stable operation of the dehydrator in the oilfield combined station. The dehydration efficiency is reduced, and the high-viscosity crude oil cannot be deeply purified and dehydrated after entering the electric dehydrator. The quality of the high-viscosity and high-water content oil treated by this treatment process can no longer meet the industrial requirements and export indicators.

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