Coking full-distillate oil hydrocracking method

Abstract

The present invention discloses a coking full-distillate oil hydrocracking method. According to the method, coking full-distillate and a hydrocracking gas phase heated by a heating furnace are mixed and then enter an upflow type reactor, and the hydrorefining product is separated on the upper portion of the reactor to obtain a gas phase and a liquid phase; the gas phase enters a separator to separate to obtain gas and a liquid phase; the pressure-increasing hydrorefining liquid and hydrogen gas are mixed and then enter a hydrocracking reactor from the bottom portion of the reactor, and the cracking reaction product is separated in the reactor; the obtained cracking gas phase is heated and then is mixed with raw material oil; and the obtained cracking liquid phase is mixed with the liquid phase obtained through the separator, and then fractionation is performed to obtain the hydrocracking product. With the method of the present invention, the problem of the non-uniform material distribution is well solved, the problem that the direct mixing heat exchange of the raw material oil and the hydrocracking gas phase heated by the heating furnace at the low temperature causes the sharply-increased pressure drop due to the coking deposition of the unsaturated hydrocarbon in the equipment is solved, the operating period is effectively prolonged, and the energy consumption of the equipment is reduced.

Description

technical field [0001] The invention relates to a processing method for coking whole distillate oil, in particular to a method for processing coker whole distillate oil by using a combined hydrogenation process. Background technique [0002] Due to the slow growth of crude oil production and increasingly heavy quality, the demand for clean oil products in today's world is increasing, and the product quality requirements are becoming more and more stringent. Therefore, relatively higher requirements are put forward for the crude oil secondary processing capacity of petroleum refining and chemical enterprises. The secondary processing devices of petroleum refining and chemical enterprises are mainly coking, catalytic cracking, hydrogenation and catalytic reforming devices. [0003] In petroleum processing, coking is the abbreviation of residual oil coking, which refers to the process of deep cracking and condensation reaction of heavy oil at a high temperature of about 500°C ...

AI Technical Summary

Problems solved by technology

The main method is to carry out hydrorefining treatment on coking whole distillate oil, which is not effective in upgrading heavy oil

Some methods are to hydrocrack all the coking distillate oil, which has a great impact on the yield of diesel oil. At the same time, the whole coking fraction, especially the distillate, contains more olefins and dienes. During hydrocracking, these components are easy to coke, which affects the stable operation of the production unit

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