A kind of low-quality residual oil solvent extraction device and its processing technology
A solvent and residual oil technology, which is applied in the field of inferior residual oil solvent extraction equipment, can solve problems such as out of control and affecting the quality of deasphalted oil, and achieve the effects of low energy consumption, prolonged residence time and good quality
Active Publication Date: 2018-01-16
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology
These asphaltenes will be deposited in large quantities at pipeline bends, valves, control points of constant pressure equipment, and solvent tanks. When the accumulation reaches a certain amount, the entire extraction system will be out of control, and it will also seriously affect the quality of deasphalted oil.
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[0042] The present invention will be described in detail below in conjunction with specific embodiments, but it should be understood that the specific embodiments herein are only specific examples and do not constitute limitations on the protection scope of the present invention.
[0043] The invention is a method for removing asphaltenes from inferior residual oil and improving the quality of deoiled asphalt. This residue is typically the leftover product from the distillation of crude oil used on a large scale in refineries. This residual oil has poor aging resistance and high asphaltene content. At the extraction temperature, the residual oil is miscible with the solvent.
[0044] As the residual oil contains a large amount of asphaltenes, a large amount of asphaltene will be deposited at the corners of the pipeline and the control points of the constant pressure equipment. When the accumulation reaches a certain amount, the entire extraction system will be out of control,...
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Abstract
The invention discloses a low-quality residual oil solvent extraction device and a processing technology thereof. The solvent extraction process is to extract most of the asphaltenes from the residual oil with a solvent several times its own volume, and then use another solvent for secondary extraction of the obtained light components to ensure that the asphaltenes are not Bring it into the subsequent pipeline to ensure the quality of deasphalted oil. The extraction tower is equipped with multi-layer fillers. Due to the installation of multi-layer fillers in the extraction tower, it can prevent the asphaltene from rising with the mixed solution, keep the asphaltene in the extraction tower, prevent it from entering the subsequent pipeline, and affect the constant pressure equipment. normal work.
Description
technical field [0001] The invention relates to a low-quality residual oil solvent extraction device and a processing technology thereof. Background technique [0002] Solvent deasphalting technology is to extract the oil in the petroleum atmospheric residue or vacuum residue, and remove the asphalt in the residue. Deasphalted oil is mainly used to produce lubricating oil base oil or as a raw material for catalytic cracking or hydrocracking (not limited to) subsequent processing. The bitumen removed can be used as road asphalt, construction asphalt or fuel. [0003] Both OPEC and non-OPEC countries have increased supplies of heavy crude over the past 10 years. In the four years from 2000 to 2004 alone, non-OPEC countries provided a 23% increase in the amount of heavy oil covering high-acid and high-sulfur crude oil to the market, while the supply of light crude oil decreased by 10%. The deterioration trend of global crude oil resources is changing from high sulfur to heavy...
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IPC IPC(8): C10G53/04
Inventor 范思远宁爱民高鲜会陈闯陈保莲张静
Owner CHINA PETROLEUM & CHEM CORP