Fluidization catalytic conversion feeding and reaction temperature control method

Abstract

The invention provides a fluidization catalytic conversion feeding and reaction temperature control method. One or two or more paths of all or parts of raw material oil which is preheated or not preheated directly enters a reactor without passing through a raw material oil heat exchanger, or / and all or parts exchanges heat for being warmed up or cooled by the raw material oil heat exchanger to enter the reactor so as to carry out catalytic conversion reaction after being mixed with cycling catalyst; when the reaction temperature of the reactor is controlled, one path is independently regulated, or / and the inlet temperature of two or more paths of the raw material oil is regulated simultaneously. The control method of the invention overcomes the defects of the prior art, improves the selectivity and percent conversion of fluidization catalytic conversion reaction, improves product distribution, improves the yield of light fraction and has the characteristics of reliable operation, flexible adjustment, energy saving, investment saving and the like.

Description

technical field [0001] The invention belongs to the field of petroleum refining, and in particular relates to the control technology of feed preheating and reaction temperature for catalytic conversion of hydrocarbon raw materials. Background technique [0002] Fluid catalytic cracking is one of the most important petrochemical processing processes, the purpose is to produce high-quality gasoline and liquefied petroleum gas as petrochemical raw materials from heavy oil. In the catalytic cracking unit, hydrocarbon feedstock undergoes gas-solid phase cracking reaction in the presence of a catalyst, and the high-temperature catalyst enters the catalytic cracking unit to play a catalytic role after being regenerated. The riser reactor is the core equipment of the catalytic cracking unit. The existing riser reactor includes a pre-lift section and a reaction section. The regenerated catalyst enters the pre-lift section from the catalyst inlet, and enters the reaction section to pl...

AI Technical Summary

Problems solved by technology

In this way, controlling the reaction temperature of the riser by adjusting the amount of catalyst circulation will inevitably affect the number of catalyst active centers in the reactor, thereby affecting the selectivity and conversion rate of the reaction, which is unfavorable for improving product distribution and increasing the yield of light fractions.

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