A hydrogenation reaction system

A hydrogenation reaction and reaction unit technology, applied in the field of oil refining and chemical industry, can solve the problems of inability to directly integrate the circulating hydrogen purification process and occupy a large area, and achieve the effects of reducing process complexity, improving utilization efficiency, and reducing process energy consumption

Active Publication Date: 2021-06-04
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
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  • Claims
  • Application Information

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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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  • A hydrogenation reaction system
  • A hydrogenation reaction system
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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. The hydrogenation reaction system is provided with a reaction unit, a separation unit, a desulfurization unit, a circulating hydrogen separation tank, an adsorption separation unit and a compression unit; Unit, which can realize the purification of circulating hydrogen in the device, and reuse it in the hydrogenation process, so that the discharge of circulating hydrogen in the system can be eliminated, and at the same time, the pressure reduction generated during the discharge of circulating hydrogen and the pressure increase in the process of reuse can be eliminated resulting in energy consumption.

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. effect. [0003] In the refining hydrogenation process, due to the constant pressure of the hydrogenation system, the hydrogen partial pressure of the system will continue to decrease...

Claims

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Application Information

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Patent Type & Authority Patents(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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