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Method for realizing heavy oil deep-step separation by coupled residue granulating

一种重质油、残渣的技术，应用在耦合萃余残渣造粒同时低温分离溶剂的重油深度梯级分离领域，能够解决影响过程操作、差DAO质量的调节问题、不能有效解决等问题，达到降低投资、尺寸调控、简化流程的效果

Active Publication Date: 2009-07-15
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the implementation of this patented technology still has its limitations. On the one hand, although the patent can separate asphalt at a relatively low temperature, the effect of asphalt dispersion and granulation is mainly controlled by the properties of the raffinate asphalt phase and the operating conditions of the extraction tower. Independent adjustment means, the size of asphalt particles is not easy to control, and even affects the process operation; on the other hand, the patented method still cannot effectively solve the problem of adjusting the quality of DAO for the treatment of more "heavy" raw materials, so in practical applications There are certain restrictions in

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  • Method for realizing heavy oil deep-step separation by coupled residue granulating
  • Method for realizing heavy oil deep-step separation by coupled residue granulating
  • Method for realizing heavy oil deep-step separation by coupled residue granulating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] China Shengli Crude Vacuum Residue (boiling point >520°C) is used as the raw material for deasphalting extraction process. Pentane distillate is used as solvent, and the residual oil is separated into deasphalted oil and hard asphalt powder by two-stage separation method.

[0044] The solvent composition is as follows:

[0045] Component Isobutane n-butane n-pentane n-hexane

[0046] Composition, mol% 1.00 0.057 8.05 20.90

[0047]Critical temperature, °C 135.0 152.0 196.6 234.4

[0048] The pseudocritical temperature of the mixed solvent is 199.1°C.

[0049] The raw material is mixed with the main solvent with a flow rate of 100kg / h and 350kg / h in the mixer 01 (that is, the main solvent ratio is 3.5), and enters the extraction tower 02 to separate the deasphalted oil phase and the asphalt phase, and from the lower part of the extraction tower 02 Input the auxiliary solvent, whose mass flow ratio is 0.8, to further extract the oil in the asphalt phase, so as to incre...

Embodiment 2

[0057] China Shengli Crude Vacuum Residue (boiling point >520°C) is used as the raw material for the deasphalting extraction process. The solvent composition is the same as in Example 1. The residue is separated into deasphalted oil, colloid and hard asphalt powder by using a three-stage separation method.

[0058] The raw material is mixed with the main solvent of the flow rate of 10kg / h and the flow rate of 35kg / h in the mixer 01 (that is, the main solvent ratio is 3.5), and enters the extraction tower 02 to separate the deasphalted oil phase and the asphalt phase, and the secondary solvent (secondary solvent) The solvent ratio is 0.8) entering from the lower part of the extraction tower to further extract the oil in the asphalt phase. up to 200°C.

[0059] The asphalt phase coming out of the bottom of the extraction tower 02 is mixed with the enhanced dispersion solvent and enters the gas-solid separator 07. The mixing ratio is that the mass flow ratio of the enhanced dispe...

Embodiment 3

[0065] Canada Athabasca Bitumen ATB is the bottom product (atmospheric residue) obtained from the atmospheric distillation of oil sand bitumen extracted from Athabasca oil sands, with a boiling point of >350°C and a density of >1.0g / cm at 20°C 3 (API<10), is a heavy raw material that is difficult to handle. Using pentane as solvent, it implements secondary extraction, the method is the same as in Example 1. The raw material flow rate is 100kg / h, the main solvent ratio is 3.0, the secondary solvent ratio is 0.5, the extraction tower temperature is 160°C, the pressure is 5.0MPa, and the asphalt softening point is 180°C.

[0066] The asphalt phase is mixed with the enhanced dispersion solvent, the mass flow ratio of the enhanced dispersion solvent to the asphalt is 0.02:1, and enters the gas-solid separator 07, and the rapid phase change separation of the asphalt and the solvent is realized under normal pressure conditions, and the residual solvent in the asphalt particles is 0.2...

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Abstract

The invention discloses a method and a separation system for realizing deep stepwise separation of heavy oil by coupling extraction residue granulation. The rapid phase change in the gas-solid separator is strengthened by introducing a dispersing solvent into the asphalt phase after solvent extraction and separation. Dispersed into solid particles, and the solvent is vaporized into gas, realizing the low-temperature separation of asphalt and solvent, and the size of asphalt particles is easy to control; the separation method of the present invention also includes three-stage separation of heavy oil raw materials, and the separation of heavy oil raw materials The separated deasphalted oil phase is treated with a supercritical solvent to further separate the colloidal components in the light deoiling (DAO), so as to maximize the yield and quality of the light deoiling. The process and system of the present invention use an atmospheric-pressure low-temperature gas-solid separator instead of a high-temperature and high-pressure heating furnace, and omit a colloidal separation tower feed heating or heat exchange device, thereby simplifying the process and reducing investment.

Description

technical field [0001] The invention relates to a petroleum heavy oil deep processing technology and equipment thereof, in particular to a heavy oil deep cascade separation method coupled with raffinate residue granulation and low temperature separation of solvent. Background technique [0002] Solvent deasphalting is a technology to remove the heavy component asphalt in petroleum heavy oil, which is suitable for heavy oil and oil sand bitumen obtained from mining, and various normal pressure and vacuum residues obtained in the process of petroleum processing Oil treatment, the density of this type of heavy oil (20°C)>0.934g / cm 3 Or a boiling point higher than 350°C. The deasphalted oil after deasphalting 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 deasphalted oil can be used as road asphalt, construction asphalt or fuel. [0003] Solvent deasphalting technolo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10C1/18C10G21/00
CPCC10C3/16
Inventor 赵锁奇徐春明王仁安许志明孙学文庄庆发
Owner CHINA UNIV OF PETROLEUM (BEIJING)