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Thermal plasma cracking treatment method of asphaltenes

A thermal plasma and cracking treatment technology, which is applied in the field of plasma cracking treatment process, can solve the problems affecting the overall benefit of solvent deasphalting and difficult to use efficiently, and achieve the effect of improving cooling efficiency and avoiding decomposition reaction

Active Publication Date: 2020-08-07
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the large amount of deoiled asphalt (DOA) produced by this process is difficult to be efficiently utilized by traditional chemical conversion methods.

Method used

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  • Thermal plasma cracking treatment method of asphaltenes

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Asphaltenes produced by heavy oil solvent deasphalting process, in the form of high-temperature liquid phase, pass through CH 4 The atomized transport enters the thermal plasma reactor. The reactor is a down-bed reactor with a diameter of 100 mm and a length of 600 mm. The thermal plasma torch uses hydrogen as the working gas, the input power is 2.0MW, the torch hydrogen flow rate is 75kg / h, the average temperature of the hydrogen plasma exceeds 3000K, and the temperature in the central area is 5000K. The pyrolysis product temperature is 1800K, and the pyrolysis product enters the rapid separation device (the gas-solid separation device disclosed in the prior art patent ZL00105781.2), the gas residence time is 80ms, and the solid phase residence time is 75% of the separation efficiency. The gas separated from the gas outlet, that is, the gas-phase intermediate product, enters the quenching device, and is physically and rapidly cooled by circulating water, and is lowere...

Embodiment 2

[0026] The asphaltenes produced by solvent deasphalting of heavy oil are transported into the thermal plasma reactor through Ar atomization in the form of high-temperature liquid phase. The thermal plasma torch uses hydrogen as the working gas, the input power is 2.5MW, the hydrogen flow rate is 80kg / h, the average temperature of the hydrogen plasma exceeds 3000K, and the temperature in the central area is 6000K. The pyrolysis product temperature is 2000K, and the pyrolysis product enters the rapid separation device (the gas-solid separation device disclosed in the prior art patent ZL00105781.2), the gas residence time is 80ms, and the solid phase residence time is 75% of the separation efficiency. The gas separated from the gas outlet, that is, the gas phase intermediate product, enters the quenching device, is rapidly cooled with propane, and is lowered to room temperature (thereby terminating the thermal decomposition of the product, increasing the content of acetylene in th...

Embodiment 3

[0028] Asphaltenes produced by heavy oil solvent deasphalting process, in the form of high-temperature liquid phase, pass through CH 4 The atomized transport enters the thermal plasma reactor. The thermal plasma torch uses hydrogen as the working gas, the input power is 1.5MW, the hydrogen flow rate of the torch is 70kg / h, the average temperature of the hydrogen plasma exceeds 3000K, and the temperature in the central area is 5000K. The pyrolysis product temperature is 1600K, and the pyrolysis product enters the rapid separation device (the gas-solid separation device disclosed in the prior art patent ZL00105781.2), the gas residence time is 80ms, and the solid phase residence time is 75% of the separation efficiency. The gas separated from the gas outlet, that is, the gas phase intermediate product, enters the quenching device, and is rapidly cooled with a mixture of propane and ethane (50% mole fraction each), and is lowered to room temperature (thus terminating the thermal ...

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Abstract

An asphaltene thermal plasma cracking processing method comprises the following steps: a) asphaltene produced by an inferior heavy oil solvent deasphalting process is sprayed into a thermal plasma reactor through an atomization device; b) in the thermal plasma reactor, the asphaltene undergoes a mixed reaction with a hydrogen thermal plasma jet flow, and a crackate is obtained from the reaction; c) the crackate passes through a gas-solid fast separation device, and a solid phase product and a gas phase product with the temperature of 1600-2000 K are obtained, wherein the solid phase product is a solid carbon material; and d) the gas phase product enters a quenching device, and cracked gas containing acetylene, hydrogen gas and methane is obtained. The method is suitable for processing the asphaltene produced by the inferior heavy oil solvent deasphalting process, can realize high efficiency conversion of the asphaltene, and produces high-added-value products such as the solid carbon material, acetylene, hydrogen gas and the like.

Description

technical field [0001] The invention relates to a thermal plasma cracking treatment process for asphaltenes produced in a solvent deasphalting process of inferior heavy oil, and belongs to the field of petrochemical industry. Background technique [0002] With the heavy and inferior quality of global oil resources, the technical demand for deep processing and efficient utilization of heavy oil is increasing. Solvent deasphalting technology is an effective means of lightening heavy oil: by separating impurities such as asphaltenes and heavy metals in heavy oil raw materials, deasphalted oil (DAO) can be obtained, so as to achieve the purpose of upgrading oil products. However, the large amount of deoiled asphalt (DOA) produced by this process is difficult to be efficiently utilized by traditional chemical conversion methods. [0003] Thermal plasma can provide ultra-high temperature extreme reaction conditions, so that it can realize the efficient conversion of raw materials...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C4/02C07C11/24C07C9/04C10B55/06C01B3/24
CPCC01B3/24C01B2203/0272C07C4/02C10B55/06C07C11/24C07C9/04
Inventor 张上程易胡长禄程炎颜彬航龚奇菡李天阳李知春李金吕雉
Owner PETROCHINA CO LTD
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