Simulation And Optimization Design Of Crude Oil Electric Dehydration Device Based On High Frequency Electric Field

In recent years,as the water cut of produced fluids from major domestic onshore oilfields and some offshore oilfields has increased year by year,the water cut of produced fluids in some blocks has reached more than 95%,making conventional crude oil processing and refining processes difficult.Adapt to the processing of high water-cut crude oil.Therefore,crude oil electric dehydration devices based on electric field demulsification technology have begun to be used in the technological process of petroleum refining and processing.In the tertiary oil recovery application based on water flooding and multi-element mixed flooding,the electrode structure used in conventional crude oil dehydration devices is mostly bare metal electrodes,and the frequency of the power supply used is not high,so during operation Frequent occurrences of substandard treatment and even short-circuiting of electrodes have severely affected domestic crude oil production and the quality of exported oil,and it is difficult to ensure the stable operation of the production process,which further increases the difficulty of crude oil refining and processing.In view of the above research background,this paper proposes a crude oil electric dehydration device based on high-frequency electric field demulsification technology,which is used to treat crude oil emulsions with high impurity content and high water content,so as to improve the crude oil refining process and increase crude oil production.And oil quality.The research content of this paper includes: the demulsification effect verification experiment of a small experimental prototype of high-frequency electric field demulsification,the design of the electrode structure of the crude oil electric dehydrator based on the mechanism of high-frequency electric field demulsification,and the overall structure design of the crude oil electric dehydrator.First,throughtheoretical calculation and numerical simulation,the internal electric field form and field intensity distribution of the device are optimized,and the key structure and characteristic dimensions of the device are determined by combining the calculation results and simulation results;then,the droplet sedimentation rate and the separator phase interface equation are used As a basis,determine the installation position of the electric field demulsification module and the separation module in combination with the appropriate hydraulic retention time,and at the same time select the functional components inside the electric dehydrator,and gradually optimize the performance and structure of the device to complete the high-frequency electric dehydration device The whole machine structure design;finally,through the design of the demulsification performance experiment of the small electric dehydration device,the demulsification and separation effect of the high-frequency electric field dehydration technology on the oil-water emulsion with different water content is verified,which proves that the designed electric dehydration device has the feasibility of engineering application At the same time,the optimal values of electric field parameters under different water content and the corresponding suitable adjustment ranges are given.The use of a new type of high-frequency electric dehydration device can increase the electric field strength between the plates by 20 times compared with conventional electric dehydrators without short-circuit breakdown,and the use of high-frequency electric fields can make the crude oil to be processed achieve better treatment The effect is that for oil-water mixtures with a water content greater than 10%,the new electric dehydration device can especially show the working efficiency of surpassing the conventional electric dehydrator.