High dry point heavy distillate oil hydrotreating method

Abstract

The present invention relates to a high dry point heavy distillate oil hydrotreating method. According to the method of the present invention, high dry point heavy distillate oil and hydrogen gas are mixed and then enter a first-stage reaction zone to carry out a hydrotreating reaction; the first-stage reaction zone effluent is subjected to gas-liquid separation to obtain a liquid phase, the liquid phase and hydrogen gas enter a second-stage reaction zone to carry out a hydrotreating reaction, and the second-stage reaction zone uses a hydrorefining catalyst; and the second-stage reaction zone effluent enters a separation system to obtain the hydrotreating reaction product. Compared with the hydrotreating technology in the prior art, the method of the present invention has the following advantages that: the product quality and the processing capability of the device can be substantially improved, or the operating pressure can be reduced and the operating cost can be reduced under the same product quality and processing capability condition.

Description

technical field [0001] The invention discloses a hydrogenation treatment method, in particular to a two-stage hydrogenation treatment method for processing heavy distillate oil with high dry point. Background technique [0002] With the rapid development of my country's national economy, the oil processing capacity has grown rapidly. At the same time, the price of crude oil remains high, so that the proportion of crude oil purchase cost in the total refining cost has risen sharply, and the profit margin of refiners has been greatly reduced. In addition, due to the deterioration of crude oil quality year by year, the substantial increase in the processing volume of imported high-sulfur and high-nitrogen crude oil, the increasingly stringent requirements for environmental protection on the refining process and the quality of petroleum products, and the increasing market demand for clean oil products and chemical raw materials, making The market has put forward higher requirem...

AI Technical Summary

Problems solved by technology

In addition to slowing down the diffusion of raw oil into the catalyst due to the increase in viscosity, thereby reducing the reaction rate, it also brings more non-hydrocarbon compounds with more complex structures, polycyclic aromatic hydrocarbons, gums, asphaltenes, and heavy metals. and other impurities, greatly increasing the difficulty of hydrogenation

However, when the existing hydrogenation treatment method handles the hydrogenation raw material with high dry point, higher reaction temperature, higher reaction pressure or lower operating space velocity are required, the processing capacity of the device decreases, and the energy consumption increases simultaneously, and the operation cycle shorten

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