Method and system for modifying heavy oil through hydrodynamic cavitation

A hydraulic cavitation and heavy oil technology, which is applied in the petroleum industry, refining hydrocarbon oil, etc., can solve the problems of low saturated steam pressure, high viscosity and high flow velocity of heavy oil, and meet the upgrading requirements, save energy consumption and applicability Good results

Active Publication Date: 2016-04-20
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this extreme environment can crack macromolecules, the saturated vapor pressure of heavy oil is low, and the flow velocity required to vaporize heavy oil is high, and the viscosity of heavy

Method used

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  • Method and system for modifying heavy oil through hydrodynamic cavitation
  • Method and system for modifying heavy oil through hydrodynamic cavitation
  • Method and system for modifying heavy oil through hydrodynamic cavitation

Examples

Experimental program
Comparison scheme
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Example Embodiment

[0037] Example 1

[0038] Such as figure 1 As shown, the hydraulic cavitation device 1 of this embodiment includes a heavy oil inlet section 11, a throat section 12, and a stabilizing section 13 arranged in sequence. The flow area of ​​the throat section 12 is smaller than the flow at the inlet end of the heavy oil inlet section 11 and the inlet end of the stabilizing section 13 In terms of area, the throat section 12 is respectively connected with the heavy oil inlet section 11 and the stabilizing section 13 and communicates axially. The throat section 12 is radially provided with an auxiliary agent inlet section 14 communicating with the throat section 12. Specifically, the heavy oil inlet section 11, the throat section 12, and the stabilizing section 13 are all cylindrical and have axial through holes, and flanges are provided at both ends of the heavy oil inlet section 11 and the stabilizing section 13. 12 can be provided with threaded holes, the heavy oil inlet section 11, t...

Example Embodiment

[0043] Example 2

[0044] The hydraulic cavitation device of Example 1 is used for heavy oil upgrading. The difference is: D1 is 40mm, D2 / D1 is 0.2, D3 / D2 is 0.3, L1 / D1 is 1, L2 / D2 is 1.5, L3 / D1 is 5. The inner diameter of the stabilizing section is 40mm, and the heavy oil inlet section, throat section and stabilizing section are integrally formed.

[0045] After the heavy oil is heated to about 60°C, it is pressurized to about 5.1MPa by a high-pressure pump, and then sent to the heavy oil inlet section of the hydraulic cavitation device. When the heavy oil reaches the throat section, trimethylamine (cavitating aid) is passed through the auxiliary agent inlet The stage is sucked into the hydraulic cavitation device, the trimethylamine is vaporized, and the heavy oil and trimethylamine undergo hydraulic cavitation in the stable stage. The amount of trimethylamine added is controlled so that the weight ratio of the heavy oil to the trimethylamine is 100:5; hydraulic cavitation After...

Example Embodiment

[0046] Example 3

[0047] Such as figure 2 As shown, the hydraulic cavitation device 1 of this embodiment includes a heavy oil inlet section 11, a throat section 12, an enlarged section 15 and a stabilizing section 13 sequentially arranged. The heavy oil inlet section 11, the throat section 12, and the enlarged section 15 are integrally formed, and the heavy oil Both the inlet section 11 and the enlarged section 15 have horn-shaped through holes, and the small ends of the horn-shaped through holes are both set toward the throat section 12. The throat section 12 and the enlarged section 15 are both cylindrical and have through holes. The diameter of the small end is the same as the inner diameter of the throat section 12. The through holes of the heavy oil inlet section 11, the throat section 12, and the enlarged section 15 are coaxially arranged; the enlarged section 15 is connected to the stable section 13 and communicates axially, on the throat section 12 An auxiliary agent in...

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Abstract

The invention provides a method and a system for modifying heavy oil through hydrodynamic cavitation. The method is carried out through a hydrodynamic cavitation apparatus including, in a successively manner, a heavy oil inlet section, a throat pipe section and a stable section, wherein the flow area of the throat pipe section is less than those of both the other two sections. The throat pipe section is connected to and axially communicated with the heavy oil inlet section and the stable section. An additive inlet section communicated with the throat pipe section is arranged radially on the throat pipe section. The method includes the steps of: pressurizing heavy oil and feeding the heavy oil into the heavy oil inlet section of the apparatus, sucking a cavitation additive through the additive inlet section when the heavy oil flows through the throat pipe section to perform the hydrodynamic cavitation to the heavy oil and the cavitation additive in the stable section; and feeding a hydrodynamic cavitation reaction to a gas-liquid separation apparatus to perform gas-liquid separation. The method and the system achieve modification on the heavy oil through the hydrodynamic cavitation at a low temperature with excellent modification and viscosity reducing effects achieved.

Description

technical field [0001] The invention relates to a method for upgrading heavy oil, in particular to a method and system for upgrading heavy oil by using hydraulic cavitation. Background technique [0002] Heavy oil is a density greater than 0.93g / cm 3 , Crude oil with a boiling point higher than 350°C under normal pressure. Due to the high content of long-chain macromolecules, colloids and asphaltenes, heavy oil has high viscosity and poor fluidity, which has adverse effects on crude oil transportation. Therefore, heavy oil needs to be modified such as viscosity reduction. At present, the commonly used heavy oil viscosity reduction methods at home and abroad can be divided into two categories: physical methods and chemical methods. [0003] Physical viscosity reduction methods mainly include heating viscosity reduction method, thin oil viscosity reduction method, low viscosity liquid ring viscosity reduction method, etc. The heating visbreaking method is mainly to obtain e...

Claims

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Application Information

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IPC IPC(8): C10G29/20C10G29/22C10G29/28
Inventor 郭绪强孙厚刚张永学
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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