Start-up presulfidation method of hydrogenation catalyst

Abstract

The invention discloses a startup presulfurization method of a hydrogenation catalyst. The method consists of: collecting the sulfur-containing effluent gas of a refinery plant, first conducting light hydrocarbon absorption to remove the light hydrocarbon with a high content of C1-C4, and enhancing the hydrogen purity and hydrogen sulfide concentration; then mixing the effluent gas with a circulating gas in a high pressure separator, and passing the gas generated in the high pressure separator through a circulating hydrogen desulfurization tower; and adjusting the operations on the desulfurization tower to control the concentration of hydrogen sulfide in circulating hydrogen, thus finishing sulfurization of the hydrogenation catalyst. The method provided in the invention can, on the one hand, cancel the consumption of a sulfurization agent, and on the other hand can perform optimization treatment on the sulfur-containing effluent gas, so that a more convenient and economical approach can be found for governance of sulfur-containing exhaust gases from refinery plants while startup sulfurization of hydrogenation equipment is completed.

Description

technical field [0001] The invention relates to a start-up vulcanization method of a hydrocracking catalyst, which mainly uses the low fraction gas and tail gas of an industrial hydrogenation device as a source of hydrogen sulfide to carry out start-up vulcanization of the catalyst, so as to achieve the purpose of not using a vulcanizing agent, and is suitable for Principled start-up process for hydrocracking catalysts in various oxidation states. Background technique [0002] At present, due to the increasingly heavy crude oil in the world and the strict requirements of environmental protection regulations, the hydrogenation type devices have grown rapidly at a rapid rate. The amount of waste gas is also increasing day by day. For this kind of gas, the treatment methods have always been relatively simple, the utilization rate is not high, and the waste is serious, which has caused a serious burden on the energy saving, emission reduction, and efficiency enhancement of enter...

AI Technical Summary

Problems solved by technology

Carbon disulfide (CS 2 ) has high sulfur content, low decomposition temperature, and relatively cheap price; because of its low boiling point, high relative density (1.26), and almost insoluble in water, it is generally stored in a storage tank with water and sealed, which is relatively safe to use, but toxic Larger; although the sulfur content of DMDS is low, the decomposition temperature is high, and the toxicity is slightly small, it still has certain harmfulness to the human body and should not be excessively contacted with it.

[0006] CN101003749A introduces a hydrocracking start-up method that does not require the use of vulcanizing agents in the whole process. Although the operation is simple and the process is easy, it is difficult to ensure the oxidation state and the cracking activity and activity stability of the elemental metal catalyst

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