Electric desalting/dewatering device with efficient combined electrode

A combined electrode and electric desalination technology, applied in the direction of electric/magnetic dehydration/emulsification, etc., can solve the problems of electric dehydration desalters that are not suitable for large diameters, excessive water content after dehydration, and uneven electric field, etc., to achieve increased space , Reduce the back-mixing effect and improve the effect of floating time

Inactive Publication Date: 2009-10-28
UNIV OF SCI & TECH BEIJING
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although this structure improves the separation efficiency, it is not suitable for large-diameter electric dehydration desalters because the electrode is a single layer, the processing capacity is limited, and the electric field is uniformly distributed on the cross section, which is not reasonable enough
Chinese patent ZL93216713.6 (authorized announcement number CN 2159533Y) discloses an oil-water separator. The electrodes are multi-layer ring-shaped, and the electric field formed between the lower part and the oil-water interface is uneven, and the floating time of the oil in the water is too short, resulting in oily drainage. Seriously, the water content exceeds the standard after removal

Method used

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  • Electric desalting/dewatering device with efficient combined electrode
  • Electric desalting/dewatering device with efficient combined electrode
  • Electric desalting/dewatering device with efficient combined electrode

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Embodiment Construction

[0015] The operation of this embodiment is as follows: the oil-water mixture enters the tank body 1 from the inlet pipe 2, enters the electrode assembly 4 through the distributor 3, dehydrates and desalts in the annular electric field of the electrode assembly 4, and passes through the electrode assembly at the outlet end. The arcuate mesh of piece 11 is perpendicular to the strong electric field between the cross-section plates for further dehydration. In the electric field, the oil-water mixture material flows horizontally from the inlet end to the outlet end; the falling water droplets descend along the oil flow direction in a horizontal parabolic trajectory, pass through the gaps of electrodes of each layer, and deposit on the bottom of the tank body 1 and in the water bag 6, and then It is discharged from the water bag 6. The dehydrated and desalted oil is extracted through the outlet pipe 7. Since the oil may contain solid impurities, a water flushing device can be inst...

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Abstract

The present invention belongs to the field of petrochemical technology, and is especially one kind of electric wet oil desalting and dewatering device with efficiency combined electrode and its application technology. The present invention features that the combined electrode in the raw oil inlet consists of at least two layers of electrodes with arched cross section to form several combined electric fields. The interval between two adjacent electrode layers is downwards increased gradually to make the electric field strength gradually reduced from the upper annular electric field to the bottom horizontal electric field. The last section in the raw oil outlet has strong electric field with arced grid suspended vertical plate. The present invention has increased effective electric field space, proper electric field distribution, high electric desalting and dewatering efficiency and other advantages.

Description

Technical field: [0001] The invention belongs to the field of petrochemical industry and relates to a high-efficiency combined electrode electric desalination / dehydration device used for dehydration and desalination of water-containing oil. Background technique [0002] Crude oil is pretreated to remove salt and water before it is processed in a refinery. Most of the salt in crude oil dissolves in the contained water, so desalination and dehydration are carried out simultaneously. For a long time, there are two main types of electric dehydration desalters used in oil fields and refineries at home and abroad. One is to use horizontal horizontal electrodes, and the other is to use horizontal vertical suspension electrodes. In these two types of electric dehydration desalters, the mixture of oil and water enters from the lower part of the tank, the upper part discharges oil, and the lower part drains water. During the process of falling water droplets, they are mixed with oil...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G33/02
Inventor 娄世松李晓刚范洪波
Owner UNIV OF SCI & TECH BEIJING
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