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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 oil is very high, so it is quite difficult to achieve cavitation
At present, there is no report on the upgrading of heavy oil by hydrodynamic cavitation of heavy oil at low temperature (below 70 °C)

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
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Embodiment 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. area, the throat section 12 is respectively connected with the heavy oil inlet section 11 and the stabilizing section 13 and communicated axially, and an auxiliary agent inlet section 14 communicating with the throat section 12 is arranged radially on 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 arranged at both ends of the heavy oil inlet section 11 and the stabilizing section 13, and the throat section 12 can be provided with threaded holes, and the heavy oil inlet section 11, the throat section 12 and the stabilizing section 13 can be fixed through flange screw connections, and the through holes of each section are axially connected, and e...

Embodiment 2

[0044] Adopt the hydraulic cavitation device of embodiment 1 to carry out heavy oil reforming, 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, the throat section and the stabilizing section are integrally formed.

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

Embodiment 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 expanding section 15, and a stabilizing section 13 arranged in sequence. The heavy oil inlet section 11, the throat section 12, and the expanding section 15 are integrally formed, and the heavy oil The inlet section 11 and the enlarged section 15 all have a trumpet-shaped through hole, and the small ends of the trumpet-shaped through-hole are all arranged towards the throat section 12, and the throat section 12 and the enlarged section 15 are all cylindrical and have a through hole, and the trumpet-shaped through hole The diameters of the small ends are the same as the inner diameter of the throat section 12, and the through holes of the heavy oil inlet section 11, the throat section 12, and the expansion section 15 are arranged coaxially; An auxiliary agent inlet section 14 communicating with the throat section 12 is arranged r...

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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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