Method and device for fluidized catalytic conversion

Abstract

The invention provides a method for catalytic conversion of heavy oil, which comprises a fluidized catalytic conversion process that: heavy hydrocarbon raw materials contacts a catalyst in a riser reactor or fluidized bed reactor to react; the reaction temperature is 400 to 650 DEG C (preferably 480 to 560 DEG C); the reaction pressure is 0.11 to 0.4MPa; the contact time is 0.05 to 5 seconds (preferably 0.1 to 3 seconds); and the weight ratio of the catalyst to the raw materials ( catalyst to oil ratio) generally is 3 to 15, preferably 5 to 12. The reaction products flow in a settler for catalyst and oil gas separation; the separated catalyst to be regenerated is stripped by a stripping section and enters a regenerator for coke burning regeneration; and the regenerated catalyst is cooled or directly returns to the riser reactor to be recycled. The method can solve the problems encountered in the resid-blend ratio improvement and gasoline upgrade and update processes of the prior catalytic conversion.

Description

Technical field [0001] The invention belongs to the field of catalytic cracking, and relates to a method and a device for the catalytic conversion of heavy oil. The present invention particularly relates to high density (such as more than 920kg / m 3 ) Method and device for catalytic conversion of naphthenic wax oil. Background technique [0002] As the quality of crude oil is deteriorating and the trend of requalification is increasing, the blending ratio of catalytic conversion residues continues to increase, and the quality of gasoline produced by catalytic conversion, coking, and thermal cracking 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 during the combustion process and pollute the environment. Although the use of traditional hydrorefining can reduce the olefins in gasoline to a very low level, the octane number is greatly lost. In order to solve the above...

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 conversion 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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