A hydrogenation reaction system

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...

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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.

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