Method for producing high-quality fuel oil by heavy oil hydrocracking

Abstract

The invention discloses a method for producing high-quality fuel oil by heavy oil hydrocracking. The method comprises the following steps: heavy oil, a catalyst and hydrogen gas are mixed to enter a plug-flow suspension bed hydrocracking reactor; the gas-liquid mixture product is separated in a hot high-pressure separator and a cold high-pressure separator, the gas-phase product directly enters a two-stage fixed-bed reactor, and the liquid-phase product enters a vacuum distillation tower; the residues on the bottom of the vacuum tower are directly discharged out of the device, and the gas phase enters a fixed-bed reactor; and the fixed bed reaction product is subjected to hydrogen gas and light hydrocarbon separation to enter a fractionating tower so as to obtain high-grade gasoline and diesel, and the bottom oil is circulated to enter the fixed-bed reactor. By combining the plug-flow suspension bed, fixed-bed reactor and on-line hydrogenation, the method enhances the adaptability of the raw materials and the yield and quality of the liquid product, and lowers the reaction energy consumption and operation difficulty.

Description

technical field [0001] The invention belongs to the field of petrochemical industry, and relates to a method for producing high-quality fuel oil, in particular to a method for producing high-quality fuel oil by hydrocracking heavy oil. Background technique [0002] With the development of the global economy, the demand for energy is increasing day by day. Especially in the face of China's increasing shortage of oil resources, crude oil tends to be heavy, oil products are constantly upgraded, and environmental protection requirements are becoming increasingly stringent. How to convert heavy oil into light liquid fuel efficiently and cleanly has become a challenge for the petrochemical industry. It is an important topic and an important direction for oil refining enterprises to improve their efficiency in the future. The current relatively mature residual oil hydrogenation technology is fixed-bed residual oil hydrogenation, but the fixed bed has high requirements for raw oil....

AI Technical Summary

Problems solved by technology

Due to the difference in the hydrogenation and cracking reaction capabilities of the suspended bed hydrogenation reactor and the ebullated bed hydrogenation reactor in the reaction process, especially the low hydrogenation capacity of the suspended bed reactor, the product quality is relatively low. low, further processing required

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