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Catalytic cracking method and device

A catalytic cracking and catalyst technology, applied in the direction of catalytic cracking, cracking, only multi-stage series refining and cracking process treatment, etc., can solve the problems of complex cooling measures for regenerants and many additional equipment, and achieve the benefits of product distribution and total production. Effects of increased liquid recovery and increased catalyst circulation

Inactive Publication Date: 2012-10-24
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this process is that although the residual activity of the gasoline spent catalyst is relatively high, there is still a certain gap compared with the regenerated catalyst.
This technology plans to add a regeneration inclined pipe and an air lift pipe, and set a catalyst cooler on the newly added regeneration inclined pipe. The cooled catalyst is mixed with the hot catalyst from the original regeneration inclined pipe, and the temperature is lower after mixing. The regenerant reacts with raw materials in contact. This technology can reduce the mixing temperature of the oil agent, increase the ratio of agent to oil, and improve product distribution. However, the cooling measures of the regenerant in this technology are slightly complicated and require more equipment.

Method used

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  • Catalytic cracking method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0035] Example 1 Comparative Example

[0036] The test was carried out on an ordinary riser catalytic cracking test device. The feed oil is a pipeline mixed heavy oil. The main properties are listed in Table 1. The processing capacity is 30 kg / day. The catalyst used in the test is a CDC industrial balancer, which balances the micro-reactive activity of the catalyst. It is 62, and the carbon content is 0.05w%. The main operating conditions, product distribution and main properties of the riser reactor are listed in Tables 2 and 3.

[0037] Example 2 Comparative Example

[0038] According to Example 1, the difference is that the feedstock oil is hydrogenated wax oil, the main properties are listed in Table 1, the processing capacity is 30 kg / day, the catalyst used in the test is RSC-2006 industrial balancer, and the balance catalyst has a micro-reactive activity of 60 , The carbon content is 0.06% by weight. The main operating conditions, product distribution and main properties of ...

Embodiment 3

[0039] Example 3 Comparative Example

[0040] According to Example 1, the difference is that the feedstock oil is hydrogenated heavy oil, the main properties are listed in Table 1, the processing capacity is 30 kg / day, the catalyst used in the test is MLC-500 industrial balancer, and the balance catalyst has a micro-reactive activity of 63. The carbon content is 0.03w%. The main operating conditions, product distribution and main properties of the riser reactor are listed in Table 2 and Table 3.

Embodiment 4

[0042] In such figure 1 The experiment was carried out on the catalytic cracking test device of the present invention, the processing capacity was 30 kg / day, the feed oil and catalyst were the same as in Example 1. The main operating conditions, product distribution and product properties of the riser reactor are listed in the table 4 and Table 5.

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Abstract

The invention discloses a catalytic cracking method and device. The method comprises the following steps: introducing raw oil into a lower part of a riser reactor to contact and react with a catalyst from a catalyst heat exchanger; separating oil gas after the reaction from a coked catalyst; introducing separated reaction oil gas into a fractionating tower; carrying out steam stripping on the separated coked catalyst and sending the coked catalyst into a regenerator for regeneration; carrying out heat transfer and cooling on the regenerated catalyst and part of system prevailing wind within the catalyst heat exchanger; sending part of the regenerated catalyst into the riser reactor from different heights of the riser; and sending the other part of the regenerated catalyst into the lower part of the riser reactor. The method can reduce total yield of dry gas and coke by 0.8-2 percentage, increase total liquid yield of liquefied gas, gasoline and diesel by 1.2 percentage, and reduce volume content of gasoline olefin by 5-15 percentage.

Description

Technical field [0001] The invention belongs to the field of catalytic cracking of hydrocarbon oil in the absence of hydrogen, and particularly relates to a catalytic cracking method and device for improving total liquid yield. Background technique [0002] While paying attention to environmental protection, maximizing economic benefits is always the goal pursued by enterprises. Low dry gas and coke yields and high liquid yield have always been the fundamental means for catalytic cracking technology to improve economic benefits. In recent years, various domestic research institutions have conducted fruitful research on improving the distribution of catalytic cracking products, and the technologies developed mainly include the following: [0003] The "X design" disclosed in US5451313, UOP company invented this new design in 1995, its purpose is to increase the ratio of agent to oil and improve product distribution. Its characteristic is that a catalyst mixer is installed between t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G55/06C10G11/00
Inventor 闫鸿飞王龙延刘昱孟凡东樊麦跃陈曼桥乔立功汤海涛吴辰捷李秋芝
Owner CHINA PETROLEUM & CHEM CORP
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