A catalytic cracking naphtha hydrotreating process

Abstract

The invention discloses a hydrogenation refining process of catalytic cracking naphtha, which makes the following improvements on the original catalytic cracking and catalytic stable gasoline hydrofining technological process: the catalytic naphtha is directly fed into the gasoline instead of the original absorption tower. Hydrogen refining unit, other processes remain unchanged. In this way, the catalytic absorption stabilization system only processes rich gas and does not process naphtha, and the load and energy consumption will be greatly reduced; ≤C 4 The components do not affect the hydrogenation operation and will vary with H 2 S, NH 3 The acidic components are pulled out from the stripping tower together, and the original process is returned to catalytic refining, so that the vapor pressure of the product is guaranteed to be stable; a small amount of gasoline that is brought into the stable absorption by the rich gas continues to distill from the bottom of the stabilizing tower, and the heat exchange Afterwards, the original process is mixed with crude gasoline for hydrogenation, so the material balance of the combined device will not be changed.

Description

technical field [0001] The invention belongs to the technical field of petrochemical industry, and particularly relates to a catalytic cracking crude gasoline hydrorefining process. Background technique [0002] Catalytic cracking is one of the main methods of secondary processing of petroleum fractions. It is a process in which heavy distillate oil undergoes cracking reaction under the action of high temperature and catalyst and is converted into diesel, gasoline and gas. It consists of four parts: reaction regeneration, main fractionation, absorption stabilization and flue gas energy recovery. Its absorption and stabilization function is to convert the rich gas and crude gasoline from the main fractionation tower into qualified products, including the rich gas compressor, condensing oil tank, absorption tower, reabsorption tower, desorption tower and stabilization tower. . Among them, the function of the reabsorption tower is to use diesel secondary adsorption to absorb ...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the shortcomings of the existing catalytic cracking unit and catalytically stabilized gasoline hydrofining unit due to the isolated design, resulting in repeated fractionation of stable gasoline, large processing capacity and high energy consumption of the absorption and stabilization system, the present invention provides a catalytic cracking naphtha hydrogenation Refining process, the core is to integrate gasoline stabilization, and directly send catalytic naphtha to hydrorefining

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