Lift pipe catalytic cracking method and device

A catalytic cracking device and catalytic cracking technology, applied in catalytic cracking, cracking, petroleum industry, etc., can solve the problems that the catalyst activity is not fully utilized, the stripping effect is affected by the amount of stripping steam, and the thermal cracking reaction effect is exacerbated. , to achieve the effect of reducing thermal cracking effect, improving product quality and improving product distribution
CN1226388CActive Publication Date: 2005-11-09SINOPEC LUOYANG PETROCHEM ENG CORP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SINOPEC LUOYANG PETROCHEM ENG CORP
Publication Date
2005-11-09

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Abstract

The invention discloses a method and a device for catalytic cracking of a riser in a petroleum refining process, which are mainly used to solve the problems of poor catalytic effect in the second half of the existing riser reactor, intensified thermal cracking reaction, and the like. The present invention adopts a two-stage riser reactor, the semi-regenerated catalyst and raw oil (401) with higher temperature from the first regenerator (10) enter the bottom of the riser reactor (3), and along the first reaction section (301) carry out catalytic cracking reaction upward; Introduce the regenerated catalyst from the lower temperature of the second regenerator (14) through the catalyst inlet (304) in the middle of the riser reactor (3), and from the first reaction section (301) The upward catalyst is mixed with oil and gas, enters the second reaction section (302) and continues upward to carry out the catalytic cracking reaction. The invention is mainly used for catalytic cracking processing of petroleum heavy distillates to improve the distribution of cracked products and the quality of cracked gasoline in catalytic cracking units.
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Description

technical field

[0001] The invention relates to a method and a device for catalytic cracking of a riser in a petroleum refining process. Background technique

[0002] Catalytic cracking is an important technical method for the processing of heavy fractions of petroleum, and occupies a very important position in the oil refining industry. Petroleum heavy fractions (including vacuum gas oil, coker gas oil, atmospheric residue, vacuum residue, etc.) undergo high-temperature cracking and condensation reactions under the action of catalytic cracking catalysts to produce dry gas, liquefied gas, gasoline, diesel , heavy oil (including recycled oil and oil slurry) and coke. Most of the current fluid catalytic cracking units (FCCU) use riser reactors. The length of the riser is generally between 30 and 36 meters, and the longest is more than 40 meters. In the riser catalytic cracking unit, the raw oil and catalyst enter from the bottom of the riser, react along the riser, and then...

Claims

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