Method and device for circulating cold regenerated catalyst

Abstract

The invention provides a method for circulating a cold regenerated catalyst and application thereof. A regenerated catalyst from a regenerator is cooled by a catalyst cooler to between 200 and 720DEGC, and is not mixed with a hot regenerated catalyst to directly enter a riser reactor, or is mixed with another part of uncooled hot regenerated catalyst into a mixed regenerated catalyst of which thetemperature is not lower than that of the regenerator to enter the riser reactor; and a hydrocarbon raw material undergoes contact reaction with the catalyst in the riser reactor, the reaction material flow enters a settler for the separation of the catalyst and oil gas, the separated catalyst to be regenerated is subjected to steam stripping in a steam stripping section, and then enters the regenerator for coke burning regeneration, and the regenerated catalyst is cooled and returns to the riser reactor for recycling. The method for circulating the cold regenerated catalyst has wide application, can be used for various fluid catalytic cracking processes comprising resid fluid catalytic cracking, wax oil catalytic cracking, gasoline catalytic conversion upgrading and the like, and also can be sued for other gas-solid reaction processes comprising residual oil pretreatment, fluid coking and the like.

Description

technical field [0001] The invention belongs to the field of catalytic cracking, and particularly relates to the catalytic conversion of heavy oil and low-quality gasoline by using a cold regenerated catalyst circulation method and equipment thereof. Background technique [0002] With the worsening of crude oil quality and the increasing trend of heavy quality, the blending ratio of catalytic cracking residual oil continues to increase, and the quality of gasoline produced by catalytic cracking, coking, thermal cracking and other processes has become worse. On the one hand, olefins in gasoline are effective components with high octane number; on the other hand, they produce more pollutants in the combustion process to pollute the environment. Although the olefins in gasoline can be reduced to a very low level by traditional hydrorefining, the octane number is greatly lost. In order to solve the above problems and improve the quality of gasoline products, foreign oil refinin...

AI Technical Summary

Problems solved by technology

The disadvantage of this technology is that the regenerated agent and the spent agent are directly mixed, which reduces the activity of the catalyst entering the riser reactor, which is not conducive to the catalytic cracking reaction

[0008] The current heat extraction technology, that is, the catalyst cooling technology, only has the function of heat extraction because the cold regenerated catalyst returns to the dense phase section of the regenerator, and cannot optimize the operating conditions of the reaction system. Therefore, the current reaction regeneration system technology has its shortcomings

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