Hydrogenation reaction system

A technology of hydrogenation reaction and reaction unit, which is applied in the fields of hydrotreating process, petroleum industry, processing of hydrocarbon oil, etc., can solve the problems such as the inability to directly integrate the circulating hydrogen purification process and the large floor area, and achieves the reduction of process complexity, The effect of improving utilization efficiency and reducing process energy consumption

Active Publication Date: 2019-06-25
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

Due to the shortcomings of the existing hydrogen purification technology in terms of operating pressure, floor space and process control, it cannot be directly integrated into the recycling hydrogen purification process
[0005] In the patent CN 1642860A, the method of feeding the flash gas obtained from the high-pressure separator into an absorption zone is used to improve the purity of circulating hydrogen. The method used to improve the purity of circulating hydrogen is the solvent absorption method. The solvent absorption method occupies a large area of ​​equipment. It is necessary to continuously regenerate the solvent and replenish fresh solvent. Due to the use of multiple solution high-pressure pumps, the operating cost of the solvent absorption method is much higher than that of the adsorption separation method.

Method used

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Embodiment 1

[0051] A 500,000-ton / year hydrocracking plant uses VGO as the main raw material to produce middle distillates (jet fuel + diesel), and the operating pressure of the unit is 10MPa. After the modification of the device, an adsorption separation unit is added, such as figure 1 Hydrogenation system shown.

[0052] Before the transformation, the molar concentration of new hydrogen in the original device was 95%, the molar concentration of circulating hydrogen was 78%, and the replenishment of new hydrogen was 20,000Nm 3 / h, circulating hydrogen 50000Nm 3 / h, the amount of hydrogen-containing gas discharged from the high-pressure separator is 1200Nm 3 / h.

[0053] The hydrogen circulation system of the device is reformed by adopting the present invention. After the reformation, the purity of the hydrogen circulation can be increased from 78% to 85%-95% through the adsorption separation unit. The hydrogen recovery rate of the adsorption separation unit is 95%-85%. Taking hydroge...

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Abstract

The invention discloses a hydrogenation reaction system, which is provided with a reaction unit, a separation unit, a desulfurization unit, a circulating hydrogen liquid separation tank, an adsorptionseparation unit and a compression unit. According to the present invention, by arranging the adsorption separation unit, the purification of the circulating hydrogen in the apparatus can be achieved,and the purified circulating hydrogen can be reused in the hydrogenation process, such that the external discharge of the circulating hydrogen of the system can be eliminated while the pressure reducing generated in the external discharge of the circulating hydrogen and the energy consumption caused by the pressure increasing in the reusing process can be eliminated.

Description

technical field [0001] The invention relates to the field of oil refining and chemical industry, in particular to a hydrogenation reaction system with a gas adsorption separation unit. Background technique [0002] With the deterioration of crude oil, the upgrading of oil quality and the continuous improvement of environmental protection requirements. The demand for hydrogen in refining and chemical processes is increasing. Hydrogen has been widely used in oil refining fields such as hydrocracking, hydrofinishing, and residual oil hydrogenation, as well as in chemical processes such as butyl octanol and xylene isomerization. Hydrogen plays an important role in the production of low-sulfur, low-nitrogen, and low-metal fuel oil while maximizing the efficient use of limited petroleum resources. At the same time, it plays an irreplaceable role in ensuring the long-term operation of refining units and prolonging the life of catalysts. effect. [0003] In the refining hydrogena...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G67/00
Inventor 张胜中范得权孟凡忠王阳峰张龙
Owner CHINA PETROLEUM & CHEM CORP
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