Residual oil hydrogenation method

Abstract

The invention provides a residual oil hydrogenation method which comprises the steps of: firstly carrying out a hydrogenating protective reaction on raw material residual oil in a hydrogenating protective device to obtain a hydrogenating protective product; then carrying out a hydrogenating treatment reaction on the obtained hydrogenating protective product in a hydrogenating treatment device to obtain a hydrogenating treatment product; and finally, separating the hydrogenating treatment product in a separating unit to obtain recycle hydrogen and a product. The method is characterized in that the recycle hydrogen does not pass through a hydrogenating treatment product-mixed hydrogen raw material heat exchanger, a heating furnace and a hydrogenating protective reactor but is directly mixed with the hydrogenating protective product flowing out of the hydrogenating protective reactor after heat exchange with the hydrogenating treatment product and the mixture is sent to the inlet of the hydrogenating treatment reactor. The method provided by the invention is low in equipment cost and simple to operate; the pressure difference of a recycle hydrogen system is reduced, the energy consumption level of the device is reduced, or the treatment quantity of a uniserial device is increased on the premise that the pressure difference of the recycle hydrogen system is constant.

Description

technical field [0001] The invention relates to a method for hydrogenation of residual oil. Background technique [0002] Today, as the whole society calls for sustainable development and green environmental protection, oil refining companies are facing the competitive pressure of rising crude oil prices, heavier and worse crude oil properties, rising demand for light oil products, and stricter fuel oil and environmental protection standards. It is also getting bigger and bigger, and the advanced processing of crude oil and clean fuel production technology will be further developed rapidly, and will still be the main direction of the world's refining technology development. [0003] In terms of deep processing of crude oil, it is the main purpose of refiners to convert residual oil into light transportation fuel oil and chemical raw materials to the maximum extent. The deep processing of residual oil requires vigorous development of hydrogenation devices to increase the yie...

AI Technical Summary

Problems solved by technology

However, the gas phase volume fraction of this scheme is much greater than the liquid phase volume fraction, so that the average flow rate of the mixed phase increases significantly, and the pressure drop of the circulating hydrogen system in the heat exchanger and heating furnace tube is increased. The pressure drop in the reactor and other equipment, the total pressure difference of the circulating hydrogen system often becomes the main limiting factor for the large-scale single series of the device

At the same time, due to the large flow rate of circulating hydrogen, if the pressure drop of the system is too high, the energy consumption level of the device will be greatly increased

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