A catalytic cracking reaction regeneration method

Abstract

A catalytic cracking reaction regeneration method, which is used in the catalytic reaction process of petroleum hydrocarbon raw materials. The method includes: the regenerated agent and semi-regenerated agent produced by the regenerator respectively enter different positions of the reactor to participate in the reaction, and part of the semi-regenerated agent first passes through the purification cooler. Treatment, remove the carried nitrogen, oxygen, carbon dioxide and impurity gases and then enter the reactor, the spent agent or the purified and cooled semi-regenerated agent enters the catalyst mixing section of the reactor to control the temperature of the catalyst contacted by the gasification of the raw material oil to form a catalyst in the reaction The three-stage circulation in the device and the three-stage control of the raw oil gasification zone, cracking reaction zone, reaction outlet and catalysts participating in the reaction.

Description

technical field [0001] The invention relates to a gas-solid phase catalytic reaction technology in the field of petroleum and chemical industry, in particular to a regeneration method for catalytic reaction of petroleum hydrocarbons. Background technique [0002] Petroleum hydrocarbon catalytic cracking reaction is a secondary processing process of crude oil, the reaction is mainly gas-solid phase cracking reaction, the proportion of raw materials for catalytic cracking reaction is generally greater than 0.9, and the reaction process generally produces coke with a feed amount of 5.5%~10.0%. Adhere to the surface of the catalyst, block the micropores of the catalyst, and must be regenerated. [0003] Regardless of device investment, operating energy consumption, or maintenance costs, the catalyst regeneration process plays an important role in the catalytic cracking reaction process. Reducing the excess oxygen content in the flue gas, reducing the gas pressure drop in the re...

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Problems solved by technology

[0013] In the prior art of reducing the temperature of the regenerant, the catalyst from the external heat extractor carries a certain amount of oxygen and regeneration flue gas. This part of oxygen enters the reactor to react with the reaction medium, and the oxygen entering the reactor will affect the quality of the product. problem; and the flue gas carried by the regenerated catalyst will increase the load of the rich air compressor and increase energy consumption

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