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Catalytic cracker without settler

A catalytic cracking unit, non-settling technology, applied in the field of petrochemical industry, can solve the coking problem can not be solved well, to achieve the effect of eliminating the retention of coking coke, ensuring long-term operation, and reducing the surface area of ​​heat dissipation

Inactive Publication Date: 2007-06-06
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Abstract
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Problems solved by technology

[0009] The catalytic cracking units in Chinese patents CN01144955.1, CN00102723.9 and CN97120272.9 all adopt primary and secondary cyclone separators to separate the catalyst and oil gas after the reaction, and the catalysts separated by the primary and secondary cyclone separators are respectively Enter the settler through the diplegs of the primary and secondary cyclone separators, and then use steam stripping in the stripper at the lower part of the settler to remove the oil and gas adhered and entrained in the catalyst. Due to the large space of the settler, the problem of coking still not well resolved

Method used

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Embodiment Construction

[0042] When using the non-settler fluid catalytic cracking unit of the present invention, the raw oil 12 and the regenerated oil 13 enter the riser 11 to mix with the regenerated catalyst from the regenerator, and mix and flow upward under the action of the lifting steam or the lifting dry gas 14, and at the same time A catalytic cracking reaction occurs. The reaction oil gas and catalyst enter the first-stage cyclone separator 10 at the outlet of the riser 11 for primary separation. The separated oil gas and the oil gas stripped from the stripper 3 are combined with steam, and carry a small amount of unseparated fine catalyst particles through the The ascending pipe of the first-stage cyclone separator enters the air-distributing chamber 9, and then enters the second-stage cyclone separator 6 for separation. The catalyst separated by the primary cyclone separator 10 directly enters the stripper 3 from the cone at the lower part of the primary cyclone separator, while the cata...

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Abstract

The present invention relates to fast oil gas and catalyst separation in hydrocarbon material fluid catalytic cracking, and is especially one catalytic cracker without settler. The catalytic cracker without settler features the stripping unit with lower end connected via a vertical pipe to one regenerator, the first cyclone separator connected to the upper end of the stripping unit, the riser tube with outlet connected to the first cyclone separator via pipeline, and the second cyclone separator connected serially to the upper end of the first cyclone separator and with material feeding structure communicated to the stripping unit. The catalytic cracker can realize the efficient fast gas-solid separation in the separating efficiency up to 99.99 % and average oil gas residence time shortened to 2-3 sec, and has less scaling, compact structure and low cost.

Description

technical field [0001] The invention belongs to the technical field of petrochemical industry, and relates to a fluid catalytic cracking device for hydrocarbon raw materials, in particular to a rapid separation device for oil gas and catalyst in the fluid catalytic cracking process of hydrocarbon raw materials. Background technique [0002] The fluid catalytic cracking process is one of the important oil lightening processes in the oil refining industry. The catalytic cracking process mainly includes three parts: reaction-regeneration system, fractionation system and absorption stabilization system, and the reaction-regeneration system is its core. The main equipment in the typical reaction regeneration part includes riser reactor, settler and regenerator. [0003] The gas-solid rapid separation device is installed at the top outlet of the riser reactor of the fluidized catalytic cracking unit of the refinery to realize the separation of oil gas and catalyst. On the one han...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G11/18B01J8/24B01J8/08
Inventor 魏耀东卢春喜高金森宋健斐时铭显
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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