Hydrogenation process

Abstract

The invention relates to a hydrogenation process. The hydrogenation process includes: a step of feeding high-sulfur high-nitrogen heavy distillate oil adopted as a raw material through a hydrofining reaction zone and a hydrocracking reaction zone, wherein the raw material is mainly subjected to desulphurization, denitrification, deoxidation and aromatic saturation in the hydrofining reaction zone, a hydrocracking reaction is mainly performed in the hydrocracking reaction zone, and reaction products are fed into a hot high-pressure separator; a step of reducing pressure of hot high-pressure separation oil, mixing the hot high-pressure separation oil with hydrogen-containing gas, feeding the mixture into a hot low-pressure separator, feeding hot high-pressure separation gas into a cold high-pressure separator after the hot high-pressure separation gas is cooled by an air cooler to perform gas-oil-water three-phase separation, and injecting demineralized water before the hot high-pressure separation gas is fed into the air cooler; and a step of reducing the pressure of cold high-pressure oil, feeding the cold high-pressure oil into a cold low-pressure separation, feeding cold low-pressure separation oil to a distillation system after the cold low-pressure oil and the hot high-pressure gas are subjected to heat exchange, feeding hot low-pressure gas into the cold low-pressure separator after the hot low-pressure gas is cooled by the air cooler, and directly feeding hot low-pressure oil into the distillation system. The process can effectively solve a problem that operation stability is influenced by blocking of the air cooler of the hot low-pressure separation gas in a hydrocracking process for processing the high-sulfur high-nitrogen heavy distillate oil.

Description

technical field [0001] The invention discloses a hydrogenation process method, in particular to a hydrogenation process method for processing high-sulfur, high-nitrogen low-quality raw materials. Background technique [0002] As the quality of crude oil is deteriorating year by year, the processing volume of high-sulfur and high-nitrogen crude oil has increased significantly, environmental protection has increasingly stringent requirements for refining processes and the quality of petroleum products, and the market's increasing demand for clean fuel and chemical raw materials has made the market's demand for hydrogenation technology The advancement of the level puts forward higher requirements. [0003] In order to reduce energy consumption, most of the current hydrocracking units are designed with a hot high-pressure separator (hot high fraction) process. In order to prevent NH in hot high fraction gas 3 and H 2 S forms ammonium salt crystallization at low temperature, b...

AI Technical Summary

Problems solved by technology

Compared with the existing hydrocracking process, it can solve the problem of hot and low gaseous ammonium salt crystallization blocking the air cooler and corrosion of the fractionation tower when the hydrogenation unit processes high-sulfur and high-nitrogen raw materials, ensuring long-term stable operation of the unit

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