Intelligent response control electrical desalting and dewatering electric field device

Abstract

The invention relates to an intelligent response control electrical desalting and dewatering electric field device belonging to the technical field of crude oil processing. The device comprises an oil inlet distributor and at least two layers of horizontal high-voltage electrode plates, wherein the high-voltage electrode plates are connected with a voltage output circuit controlled by a PLC, the oil inlet distributor is formed by branch pipelines which are mutually isolated, oil inlet spray nozzles are arranged on the branch pipelines and are positioned between the adjacent horizontal high-voltage electrode plates, the ejection direction of the oil inlet spray nozzles is parallel to the horizontal high-voltage electrode plates, and annular electrode plates surrounding the oil inlet spray nozzles are respectively and oppositely extended out on the two adjacent horizontal high-voltage electrode plates, so that a dispersion mixed area positioned between the two opposite annular electrode plates and an accumulating sedimentation area positioned at the periphery of annular electrodes are formed, and the electric-field intensity of the dispersion mixed area is greater than that of the accumulating sedimentation area. The invention realizes the organic combination of an electric dispersion mixed technique and an accumulating sedimentation technique, enables the mixing of crude oil and water droplets to reach a best effect and obviously improves the desalting effect; and compared with the traditional electrical desalting technique, the invention can save water by more than 50%.

Description

[0001] Intelligent response control electric field device of electric desalination and dehydration equipment Technical field [0002] The invention relates to an electric field device for crude oil desalination and dehydration, in particular to an intelligent response control electric desalination and dehydration electric field device, which belongs to the technical field of crude oil processing. Background technique [0003] With the rapid development of the world economy, the demand for crude oil is also increasing, and the price of crude oil is also getting higher and higher. The oilfields have adopted various new oil extraction technologies to increase the intensity and depth of extraction, making the nature of the extracted crude oil more and more difficult. In addition, in order to reduce costs, refineries will also refine some low-quality crude oils with high specific gravity, high viscosity, high acid value, high water content, high salt content and easy emulsification. Wh...

AI Technical Summary

Problems solved by technology

Although high-speed electric desalination achieves the purpose of large processing capacity in a small tank, it will also be difficult to process heavy and inferior crude oil with high specific gravity, high viscosity, high acid value, high water content, high salt content, and easy emulsification. After desalination, the salt and water content is relatively high, the electric desalination operation current is large, and the drainage oil content is high.

[0008] In addition, the electrical desalting equipment imported in recent years has poor adaptability to various crude oils, and is often only suitable for processing one or several types of crude oil. However, Chinese refineries process many types of crude oil, and frequently switch between different types of crude oil. Due to the violent fluctuations in the supply market, some refineries are exploring to change the high-quality crude oil originally designed to process high-quality crude oil to process low-quality crude oil to reduce the purchase cost of crude oil, which increases the difficulty of electric desalting pretreatment. There will be problems such as high salt and water content after desalination, high operating current of electric desalination, even short circuit, oily drainage, etc.

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