Hydrocarbon material catalytic cracking lift pipe reactor

A catalytic cracking and reactor technology, applied in chemical instruments and methods, naphtha catalytic reforming, chemical/physical processes, etc., can solve the problems of poor versatility of equipment and complex engineering, and achieve simple structure, high catalyst density, Reduces the effect of catalyst backmixing
CN1640538AInactive Publication Date: 2005-07-20石宝珍
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
石宝珍
Publication Date
2005-07-20
Estimated Expiration
Not applicable · inactive patent

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Abstract

The present invention relates to a catalytic cracking lift pipe reactor for hydrocarbon raw material. It comprises parallelly-arranged first reactor and second reactor and coaxially series-connected third reactor and fourth reactor, the upper ends of first and second reactors are serial-connected with lower end of third reactor, and is formed from prelift stage of lower portion and cracking reaction stage of upper portion, the bottom portion of its prelift stage is equipped with prelift gas inlet pipe, its lower portion is equipped with a catalyst inlet pipe, and the lower portion of its craking stage respectively is equipped with raw material oil inlet pipe nozzle, recycle oil and slurry oil inlet pipe nozzle. Said invention also provides the concrete structure of third and fourth reactors. Said invention can raise gasoline yield by 1%, and the olefin content in the produced gasoline can be reduced by 10-15%.
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Description

technical field

[0001] The invention belongs to the technical field of petroleum refining equipment, in particular to a hydrocarbon raw material catalytic cracking riser reactor. Background technique

[0002] The catalytic cracking unit is one of the important equipment for the secondary processing of raw oil in the refinery, and the riser reactor is the core equipment of the catalytic cracking unit. The existing riser reactor usually adopts a reactor with equal diameter, and the reaction efficiency in the upper part of the reactor is very low. In recent years, many improvements have been made in the riser reactor. For example, Chinese patent applications 99213769.1 and 00134054.9 have proposed a double riser reactor scheme. The double riser reactor is arranged in two sections, the first section (the first lift tube reactor) is used for raw oil cracking. After the reaction product is separated from gas and solid, gasoline enters the second riser reactor in the upper part, a...

Claims

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