Combined electrode electric desalting dewatering equipment

Abstract

The invention discloses a high efficient compound electrode electrical desalting and dehydrating device. An electrode assembly of the invention comprises a compound electrode with at least two arched cross-section to form a plurality of combined electric fields. The spacing between two adjacent electrode layers can be gradually increased from the top down, which allows the electric field intensity of the annular electric field on the upper part to be gradually weakened from the electric field on the top to the electric field on the bottom. The invention can ensure that the space of the effective electric field in the tank is increased and the distribution of the electric field intensity can adapt to the requirement of each area in the tank to the change of the electric field intensity. Compared with the prior electrical desalting and dehydrating device, the invention has the characteristics of large processing capacity, high separation efficiency and steady interface level.

Description

Technical field [0001] The invention relates to a salt and water separation technology for crude oil pretreatment, in particular to a high-efficiency combined electrode electric desalination and dehydrator for the dehydration and desalination of water-containing oils. Background technique [0002] Crude oil needs to be pre-treated before being processed in the refinery to remove the salt and water it contains. Most of the salt in crude oil is soluble in the water contained, so desalination and dehydration are carried out at the same time. For a long time, there are mainly two 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 hanging electrodes. In these two forms of electric dehydration desalinizers, the mixture of oil and water enters from the lower part of the tank body, the upper part discharges the oil, the lower part drains, and it mixes w...

AI Technical Summary

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 CN2159533Y) discloses an oil-water separator. The electrode adopts a multi-layer ring, and the electric field formed between the lower part and the oil-water interface is not uniform, and the floating time of the oil in the water is too short, resulting in severe oily drainage.

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