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A method of coal liquefaction to produce light oil

A technology for light oil and coal, which is applied in the field of coal liquefaction and coal liquefaction to produce light oil. It can solve the problems of increasing energy consumption and hydrogen consumption, and achieve the effects of less energy and material loss, short process, and large operating flexibility.

Active Publication Date: 2017-03-22
SHAANXI YANCHANG PETROLEUM GRP
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Problems solved by technology

However, the process uses off-line hydrogenation, which increases the energy consumption and hydrogen consumption of the reaction.

Method used

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  • A method of coal liquefaction to produce light oil

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Embodiment Construction

[0029] The method for producing light oil by coal liquefaction of the present invention specifically comprises the following steps:

[0030] a. Mix and stir coal powder, solvent oil and catalyst to make oil-coal slurry, and mix with H 2 Mixed into the suspension bed hydrocracking unit for hydrocracking reaction to obtain gas, liquid and solid three-phase mixed products, the operating pressure of the suspension bed reaction unit is 16-25MPa, the temperature is 440-500°C, and the gas-liquid ratio is 500-1500L / kg. The air speed is 0.2~1.5h -1. The coal powder, solvent oil and catalyst are mixed and stirred in the raw material tank, the stirring time is 2-6 hours, and the stirring temperature is 120°C-180°C. The mass content of the coal powder in the oil-coal slurry is 30-55%, the particle size is 20-200 μm, the mass content of water is not higher than 2%, and the mass content of ash is not higher than 8%. The solvent oil is composed of heavy oil, the side cut oil of the vacuum...

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Abstract

The invention discloses a method for producing light oil through coal liquefaction. According to the method, the cascade conversion principle that coal is converted from coal slurry into macromolecule former asphaltene / asphaltene and then into micromolecule oil in the direct coal liquefaction process is fully utilized, a plug flow suspension bed reactor which is high in solid content adaptability, an internal circulation suspension bed reactor which is high in mass and heat transfer efficiency and a fixed bed reactor which is good in hydrogenation effect are optimized and combined, and high-efficient conversion of the coal is achieved; meanwhile, heavy aromatic oil laterally drawn by a vacuum distillation tower, tower bottom oil processed through hydrogenation and internal heavy oil are used as coal powder solvent oil, and not only are the sufficient sources and the hydrogenation performance of the solvent oil guaranteed, but also the operation elasticity is improved. According to the method, the process route is short, raw materials are flexible, the energy consumption is low, the conversion rate and the liquid yield is high, and not only can direct coal liquefaction operation be performed, but also the coal-oil coprocessing operation can be achieved to produce high-quality liquid fuel.

Description

technical field [0001] The invention belongs to the technical field of coal application, and relates to a coal liquefaction treatment method, in particular to a coal liquefaction method for producing light oil. Background technique [0002] With the steady growth of China's economy, the increase of energy consumption, the change of geopolitics and the intensification of the contradiction between global oil supply and demand. my country's oil and gas resources are insufficient, oil production is less than half of the demand, and the remaining recoverable reserves per capita are only 6% of the world's average level. Oil security issues are prominent. Moreover, according to my country's resource endowment, the coal-based energy consumption structure will not change significantly for a considerable period of time. However, only the clean and efficient conversion and utilization of coal will be conducive to the healthy development of the coal chemical industry, and will also hel...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G1/00C10G67/00
Inventor 黄传峰李大鹏王明峰杨永佳杨天华李晓宏李伟韩磊高伟焦友军
Owner SHAANXI YANCHANG PETROLEUM GRP
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