Contact chamber for catalytic cracking of oil

Abstract

The catalytic cracking oil preparation contact chamber includes the following members: cylinder, inclined partition board, vertical partition board, gas distributing board, gas collecting chamber partition, hydrocarbon oil nozzle and chute reaction section. Of the cylindrical oil preparation contact chamber, the inclined partition board in one angle of 30-60 deg to the central line, the verticalpartition board connected to the inclined partition board and the hydrocarbon oil nozzle are on one side of the central line; the inclined partition board and the vertical partition board separate the space over the gas distributing board inside the contact chamber into two regions; the gas collecting chamber partition fixed below the gas distributing board separates the space below gas distributing board inside the contact chamber into two gas collecting chambers corresponding to the said regions; and the hydrocarbon oil nozzle fixed to the cylinder and via the vertical partition board has an angle of 5-30 to horizontal plane.

Description

technical field [0001] The invention belongs to petroleum hydrocarbon catalytic cracking equipment, more specifically, an oil agent contact chamber used in a downward catalytic cracking process. Background technique [0002] For more than 50 years, catalytic cracking has played a pivotal role in the world oil refining industry. Therefore, there are relatively many researches on catalytic cracking technology and catalyst technology, and the development is rapid. From the fluidized bed reactor to the riser reactor, the reaction time is greatly shortened, the product selectivity is improved accordingly, the gasoline yield is greatly increased, the coke yield is greatly reduced, and the proportion of slag mixed is rapidly increased. At present, catalytic cracking technology is developing in two directions, one is residual oil catalytic cracking, and the other is catalytic cracking that produces more gaseous olefins. With the increase in the quality of raw oil and the improveme...

AI Technical Summary

Problems solved by technology

[0003] 1) The back-mixing of solvent oil contact will lead to colloid and asphaltene adsorption coke formation in residue oil, high coke formation coefficient of residual carbon conversion, insufficient conversion depth of heavy oil, and poor product selectivity

[0004] 2) Catalyst back-mixing and prolongation of residence time intensify the secondary reaction and metal dehydrogenation reaction, increase the carbon deposition on the catalyst, decrease the reaction activity, and increase the light olefins

Although the cross-flow contact strengthens the agent-oil contact, there are still weaknesses such as poor agent-oil contact efficiency

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