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Raw oil dewatering and desalting process

A crude oil dehydration and process technology, which is applied in the field of crude oil dehydration and desalination, can solve the problems of failing to meet the corresponding technical standards and requirements, and achieve the effects of saving energy, avoiding mutual interference, and saving costs

Inactive Publication Date: 2006-05-17
YANGZI PETROCHEM +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome that the existing conventional methods of desalination and dehydration of oil products cannot meet the corresponding technical standards and requirements, and propose a new method that combines the standing wave or traveling wave sound field with the electric field. Process, improve and strengthen the existing oil dehydration and desalination process, improve the adaptability of dehydration and desalination sections to oil products, further reduce the water content and salt content in oil products, and meet the needs of oil refining production

Method used

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  • Raw oil dewatering and desalting process

Examples

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Embodiment 1

[0021] This process is used to dehydrate and desalt Luning crude oil. The treatment temperature is 70-90°C, the ultrasonic frequency is 10kHz, the magnetostrictive transducer is used, the residence time is 7.5min, the initial water content is less than 0.4%, and the salt content before removal is 39.5mgNaCl / L, water injection is about 5.0%. After a single standing wave ultrasonic-electric field combined action, the water content of crude oil after dehydration is 0.13%, and the desalt content of crude oil is 2.2mgNaCl / L.

Embodiment 2

[0023] This process is used to dehydrate and desalt Luning crude oil. The treatment temperature is 70-90°C, the ultrasonic frequency is 20kHz, the piezoelectric ceramic transducer is used, the residence time is 5min, the initial water content is less than 0.4%, and the salt content before desalination is 39.5mgNaCl / L, about 5.0% water injection, after a single standing wave ultrasonic-electric field combined action, the water content of the crude oil after dehydration is 0.28%, and the desalt content of the crude oil is 3.5mgNaCl / L.

Embodiment 3

[0025] This process is used to dehydrate and desalt Luning crude oil, the treatment temperature is 70-90°C, the ultrasonic frequency is 10kHz, the magnetostrictive transducer, the residence time is 9.4min, the initial water content is less than 0.4%, and the salt content before desalination is 39.5mgNaCl / L, water injection is about 4.0%. After a single standing wave ultrasonic-electric field combined action, the water content of crude oil after dehydration is 0.12%, and the desalt content of crude oil is 2.5mgNaCl / L.

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Abstract

The present invention relates to raw oil dewatering and desalting process, and is especially combined stationary ultrasonic wave-electric field process of dewatering and desalting various kinds of oil product. The technological scheme is that stationary ultrasonic wave field and electric field are combined for oil dewatering and desalting aim. That is, raw oil is first added with fresh water and demulsifier and mixed in static mixer or other mixer, then acted with stationary or traveling ultrasonic wave, and finally dewatered and desalted in a conventional electric desalter. The present invention is one improved and reinforced oil product dewatering and desalting process and has raised oil product adapting capacity and low water and salt content of product.

Description

technical field [0001] The invention relates to a crude oil dehydration and desalination process, in particular to a standing wave or traveling wave ultrasonic-electric field combined process for dehydration and desalination of various oil products. Background technique [0002] With the in-depth development of oil fields, crude oil is getting heavier and worse in quality. Therefore, conventional demulsification and dehydration methods cannot effectively remove impurities such as water and salt in crude oil, thereby affecting the subsequent processing of oil refining. The water content of the crude oil delivered from the oil field is ≤1.0%. After the desalination and dehydration of the crude oil in the refinery, the salt content (calculated as NaCl) is required to be ≤3.0mg / L and the water content ≤0.3%. The decalcification of crude oil with high calcium content is treated by conventional methods, which is also difficult to meet the needs of refineries. [0003] Convention...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G33/02
Inventor 吕效平彭飞叶国祥尤侯平韩萍芳谢伟
Owner YANGZI PETROCHEM
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