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A method for reducing viscosity of heavy oil

A heavy oil and visbreaking technology, which is applied in the treatment of hydrocarbon oil, petroleum industry, cracking, etc., can solve the problems of prolonging the production cycle, achieve the effects of increasing liquid yield, increasing liquid product yield, and reducing coking

Active Publication Date: 2021-02-09
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method only prolongs the production cycle by optimizing the process conditions, and does not fundamentally solve the problem of coking in the furnace tube of the visbreaking heating furnace

Method used

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  • A method for reducing viscosity of heavy oil
  • A method for reducing viscosity of heavy oil
  • A method for reducing viscosity of heavy oil

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Experimental program
Comparison scheme
Effect test

Embodiment approach

[0053] According to a preferred embodiment of the present invention, the included angle β of the herringbone baffle 20 is 10-150°, preferably 30-100°.

[0054] According to a preferred embodiment of the present invention, the cone angle α of the lower cone collection zone 22 is 10-150°, preferably 70-120°; more preferably, the aspect ratio of the straight cylinder reaction zone (21) is 2-10:1, more preferably 2-8:1.

[0055] In the present invention, it is not limited to the form of the spray visbreaking tower, as long as the heavy oil visbreaking unit conforms to the direct contact heat transfer form of liquid droplets and hot air.

[0056] According to the method of the present invention, the equipment further includes a fractionation unit d connected in series with the heavy oil visbreaker unit c, and the fractionation unit d is used for separating the visbroken product from the heavy oil visbreaker unit c.

[0057] According to the method of the present invention, the equ...

Embodiment

[0101] Three groups of tests were carried out on the heavy oil visbreaking medium-scale test device, namely Example 1, Example 2, and Example 3. The test device flow chart of embodiment sees figure 1 .

[0102] Follow the steps below (eg figure 1 ):

[0103] 1. After the heavy oil is preheated to 150-350°C through the heat exchanger f (200°C in Example 1, 250°C in Example 2, and 280°C in Example 3), it enters from the top of the spray vis-reducing tower, and is sprayed by atomization The nozzle disperses into small droplets of 20-600μm.

[0104] 2. The small droplets are in contact with 400-900°C high-temperature deoxygenation hot air (450°C in embodiment 1, 500°C in embodiment 2, and 600°C in embodiment 3) in the spray vis-reducing tower for 0.01-60min (the embodiment 1 is 600°C). 10min, embodiment 2 is 8min, embodiment 3 is 5min), the liquid droplet takes place thermal cracking reaction rapidly in the hot blast, after the reaction, the remaining viscosity-reducing residu...

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Abstract

The invention relates to the field of cracking, and specifically provides a method for visbreaking heavy oil, the method comprising: (1) heating the gas medium, and then removing oxygen to obtain deoxygenated hot gas; (2) contacting the deoxygenated hot gas with heavy oil raw materials Heat to the required temperature for cracking and carry out visbreaking reaction to obtain oil and gas products and visbreaking residue. The heavy oil visbreaking method provided by the present invention overcomes the traditional method of directly heating the heavy oil raw material to the temperature required for cracking by heating the gas medium, removing oxygen and then using it to contact the heavy oil raw material for heat exchange to the required temperature for cracking The severe coking caused by the phenomenon can not only reduce the coking in the heating unit such as the furnace tube of the heating furnace, but also increase the liquid yield.

Description

technical field [0001] The invention relates to a method for visbreaking heavy oil. Background technique [0002] At present, more than 70% of the remaining oil resources in the world are heavy oil resources. In my country, onshore heavy oil and asphalt resources account for more than 20% of the total petroleum resources. Oil sands are estimated to have more than 6 billion tons of geological resources and more than 3 billion tons of recoverable resources. The proportion of unconventional oil (such as various heavy oil, oil sand bitumen, etc.) will gradually increase, and will become one of the important strategic alternative resources in my country. [0003] Visbreaking is a mild thermal cracking process, the main purpose is to reduce the viscosity of residual fuel oil and improve the pour point of oil products, so as to facilitate transportation and subsequent processing. It is an important process of heavy oil processing. The conventional process flow is as follows: the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G9/36
CPCC10G9/007C10G9/36C10G2300/1033C10G2300/1037C10G2300/302
Inventor 吕庐峰张翊李学锋何金龙田志鸿刘亚林
Owner CHINA PETROLEUM & CHEM CORP
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