Oil-water separation system with high-efficiency electromagnetic synchronous synergy

Abstract

The invention relates to an oil-water separation system with high-efficiency electromagnetic synchronous synergy. It includes an enhanced coalescence device and a sedimentation separation device. It is characterized in that a pipe-type liquid distributor is installed at the bottom of the sedimentation separation device, and the enhanced coalescence device is equipped with an electromagnetic coalescence component, and a There is a liquid distribution orifice, and the electromagnetic coalescing component includes a coaxially distributed electric field generating component and a magnetic field exciting component, and the electric field and the magnetic field are orthogonally distributed and synchronously act together. The electric field generating component includes a grounded external electrode and an electrode wrapped with an insulating cylinder at the center of the axis, allowing the electric field strength to be increased to 350kV / m; the magnetic field excitation component includes an outer layer and an inner layer coil coaxially sheathed on the outer electrode, and the outer layer coil is larger than The number of turns of the inner coil, the two are contained in the self-circulating cooling jacket. The invention significantly improves the efficiency and scope of oil-water separation, and can handle oil-water emulsions with a water content as high as 40%, so it is widely applicable to efficient and stable devices and facilities for oil-water separation on land and at sea.

Description

technical field [0001] The invention belongs to the technical field of multiphase separation of oil and gas gathering and transportation systems, and in particular relates to an oil-water separation system with high-efficiency electromagnetic synchronous synergy. Background technique [0002] As major oilfields enter the middle and later stages of development, enhanced oil recovery methods such as water injection, agent injection and polymer injection are more and more widely used, and the emulsification of oil-water mixture produced from the wellhead is becoming more and more serious. The water content in crude oil increases the proportion of ineffective work in the power system, increases the proportion of ineffective heat energy in the thermal system, and easily causes corrosion and scaling of storage and transportation equipment. Therefore, it is of great significance to study the efficient separation technology of oil-water emulsion to improve the safe and stable operat...

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Problems solved by technology

Therefore, the lower end of the electrode of this device is located at the water outlet, and the lower end of the electrode will be in the water layer for a long time, which has a great impact on the life of the electrode insulation material.

In addition, after the emulsion is treated by the electric field and magnetic field, it still takes a considerable time for gravitational settling to separate the water. Therefore, in order to ensure the gravitational settling time, the axial dimension of the device is relatively large, which will also seriously affect its installation and maintenance. fixed

[0006] The magnetoelectric dehydration device disclosed in the above-mentioned patent mainly has four problems: first, when the water content of the emulsion is high on the bare metal electrode plate, the collapse electric field effect caused by the conduction of the water droplet chain may appear in the emulsion flow channel, and the voltage is relatively high When the high voltage breakdown medium may occur between the plates, the electric field collapse may occur. Therefore, this type of device is only suitable for emulsions with low water content, and the electric field strength is limited; second, the size of the device, the separation of coalescence and sedimentation The one-piece vertical design will increase the axial size of the device, which is not conducive to installation and fixing; third, the electromagnet generates heat, and when excited to generate a high-intensity magnetic field, it is accompanied by a large amount of heat release. The overheating of the coil makes it difficult to increase the magnetic field strength and may even cause a short circuit accident

More importantly, the separation efficiency of the existing technology is low, especially for the treatment of high-water emulsions. Obviously, it is necessary to achieve efficient separation of oil-water emulsions and improve the stability and safety of device operation.

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