SU1480848A1 - Electric dehydrator - Google Patents

Abstract

The invention relates to the technique and technology of dewatering oil and other water-in-oil emulsions. The purpose of the invention is to increase the efficiency of the destruction of the emulsion in the electrohydrator. The electrohydrator includes a housing with nozzles for entering the emulsion, water and oil output. A high-potential electrode in the form of a perforated pipe, hydraulically connected to the input nozzle, is installed in the housing. A spiral dielectric insert and an axial grounded rod electrode are installed in the pipe. Deflectors in the form of dielectric conical plates are installed between the pipe and the housing with a gap. 1 hp ff, 2 ill.

Description

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The invention relates to devices for dewatering petroleum and other emulsions such as water in oil in an electric field and can be used for dewatering petroleum and petroleum products in fields and petrochemical plants.

The purpose of the invention is to increase the efficiency of the destruction of the emulsion in the electrodehydrator.

FIG. 1 shows an electric dehydrator; a section; FIG. 2 - the same, with a conical high potential electrode.

The dehydrator contains a housing 1 with nozzles input emulsion 2 output dehydrated emulsion 3 and water discharge 4. Inside the housing 1 axially installed high potential electrode made in the form of a pipe 5 with perforation 6 and connected to the nozzle 2 input emulsion using

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the dielectric sleeve 7. A high voltage is applied to the electrode 5 through the bushing 8, and the housing 1 is grounded. Inside the electrode 5 there is a dielectric spiral insert 9 and an axial grounded rod electrode 10.

Fig. 2 shows an embodiment of an electric dehydrator with a high potential electrode 5 made in the form of a conical tube with a cross section that decreases along the flow of the emulsion introduced through the nozzle 2.

Between the case 1 and the electrode 5 there are placed deflectors 11, made in the form of dielectric plates, which are installed perpendicular to the axis of the case 1 so that gaps 12 form between them and the case, and gaps 13 between them and the electrode 5.

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Electrodehydrator works as follows.

The emulsion being processed through the pipe 2 enters the spiral channel formed by the spiral insert 9, pipe 5 and rod 10. Due to the swirling flow of the emulsion in the spiral channel the water globules enlarged under the action of the electric field are thrown by centrifugal forces to the inner wall of the pipe 5 and through the perforation 6 the space between tube electrode 5 and grounded housing 1, where the destruction of the emulsion also occurs under the action of an electric field. At the same time, the flow of the emulsion in the settling volume between the housing 1 and the electrode 5 moves to the outlet nozzle 3 up due to the presence of baffles 11 along the periphery of the settling volume through the gaps 13, and the water released from the electrode 5 flows down through the gaps 12, due to which - fluid is circulated in the settling volume (the direction of the flow is shown by arrows), the accumulation of water near the outer surface of the electrode 5 is intensified and, as a result, the efficiency of emulsion destruction in the proposed electro-dehydrator increases e.

Due to the implementation of a high-potential electrode in the form of a perforated pipe and the placement of a spiral insert and a grounded rod electrode in it, the destruction of the emulsion in an electric field occurs not only in the flow-twisting zone, but also in the settling volume between the perforated pipe and the grounded body of the dehydrator. The implementation of the deflectors in the form of dielectric plates installed with a gap between the pipe and the body perpendicular to the axis ensures the circulation of fluid in the settling volume

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with the accumulation of water near the perforated pipe. The electrical effect on the emulsion in the settling volume and the concentration of water on the outer surface of the perforated pipe provide a high efficiency of destruction of the emulsion in the proposed electrode for the eductor.

The efficiency of emulsion destruction will increase if the high potential electrode is made in the form of a conical tube with a cross section that decreases along the emulsion flow, as this increases the electric field strength as the watering of the processed emulsion decreases both in the electrical centrifugal zone and in the sump volume.

Claims (2)

1. Electrodehydrator, which includes a grounded cylindrical body with an emulsion injection pipe, an axially located high potential electrode, a dielectric spiral insert, and a baffle for recirculating a liquid, characterized in that, in order to increase the efficiency of emulsion destruction into the ehydrator electrode, the high potential electrode is in the form of a hydraulically connected with a perforated tube inlet with an axially grounded electrode, with a spiral dielectric insert placed inside the perforated th e pipes, and baffles are formed as conical dielectric plates and are installed with a gap between the tube and the housing. 2. Electrodehydrator according to claim 1, characterized in that the high-potential electrode is made in the form of a conical tube with a cross section that decreases along the flow of the processed emulsion. 7 t Phie.1 Y