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Method and device for carrying out partitioning catalytic cracking on coking waxen oil

A technology for coking wax oil and catalytic cracking, which is applied in the field of catalytic conversion of petroleum hydrocarbons, can solve problems such as the influence of catalytic cracking process, achieves excellent product distribution, solves difficult processing, and improves liquid yield.

Inactive Publication Date: 2011-03-30
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] The purpose of the present invention is to solve the problem that the basic nitrogen and aromatic hydrocarbons in the coking gas oil affect the catalytic cracking process, and make full use of the existing catalytic cracking device to effectively process the coking gas oil

Method used

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  • Method and device for carrying out partitioning catalytic cracking on coking waxen oil
  • Method and device for carrying out partitioning catalytic cracking on coking waxen oil

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Experimental program
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Effect test

Embodiment 1

[0040] Embodiment 1 of the method and device for processing coker wax oil proposed by the present invention is as figure 1 shown.

[0041] The method is as follows: at first, the riser reactor 1 of the conventional catalytic cracking unit is divided into upper and lower reaction zones, the upper reaction zone is 2, the lower reaction zone is 3, and the lower reaction zone 3 is divided by an inner pipe 4 and an outer pipe 5. It is two independent areas inside and outside, and the ratio of the cross-sectional area of ​​the inner pipe to the cross-sectional area of ​​the annulus is 1:1-10. The inner pipe 4 is connected to the inclined regeneration pipe 13, and the outer pipe 5 is connected to the inclined regeneration pipe 14. The length of the riser reactor including the upper and lower reaction zones is called the effective length of the riser reactor. The length of the lower reaction zone 3 is 5% to 50% of the effective length of the riser reactor, preferably 10% to 30%. On t...

Embodiment 2

[0047] figure 2 Example 2 showing the method and apparatus for processing coker gas oil according to the present invention.

[0048] The method is firstly dividing the riser reactor 201 of the conventional catalytic cracking unit into upper and lower reaction zones, the upper reaction zone is 202, the lower reaction zone is 203, and the lower reaction zone 203 is divided by an inner pipe 204 and an outer pipe 205. It is two independent areas inside and outside, and the ratio of the cross-sectional area of ​​the inner pipe to the cross-sectional area of ​​the annulus is 1:1-10. The inner pipe 204 is connected to the regeneration inclined pipe 213, and the outer pipe 205 is connected to the regeneration inclined pipe 214. The length of the riser reactor including the upper and lower reaction zones is called the effective length of the riser reactor. The length of the lower reaction zone 203 is 5 to 50% of the effective length of the riser reactor, preferably 10 to 30%. On this...

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Abstract

The invention discloses method and device for partitioning catalytic cracking on coking waxen oil, which are mainly used for solving the problem that the process product distribution becomes poor because alkalic oxides preferentially absorb on the acidic activity center of a catalyst to reduce the activity and the selectivity of the catalyst when the coking waxen oil is mixed and melted in a catalytic cracking process. In the invention, a catalytic cracking lifting pipe reactor is divided into an upper reaction region and a lower reaction region, wherein the lower reaction region is in a vertical sleeve structure which is divided into an inner sleeve region and an outer sleeve region that are independent to ensure that the coking waxen oil enters the inner sleeve region for carrying out catalytic cracking reaction and conventional raw materials enter the bottom of the upper reaction region to be in contact and react with a refresh regenerable catalyst from an annular space region of the vertical sleeve structure of the lower reaction region to ensure that the refresh regenerable catalyst being in contact with the conventional raw materials are free of being damaged by pollutants of basic nitrogen and the like brought in by the coking waxen oil, so as to achieve the purposes that the conventional raw materials are fully cracked and excellent product distribution is obtained. The material flow after the coking waxen oil is subjected to the primary reaction and then joined with the conventional raw materials in the upper reaction region and then passes through the lifting pipe reactor and enters a settling and stripping system together with the conventional raw materials. Compared with the conventional catalytic cracking mixing and melting coking waxen oil, the invention remarkably improves the liquid yield while increasing the mixing amount of the coking waxen oil.

Description

technical field [0001] The invention belongs to the catalytic conversion process of petroleum hydrocarbons, in particular to the catalytic cracking process technology of delayed coking middle distillate coking wax oil. Background technique [0002] Delayed coking is one of the important secondary processing processes of petroleum, and it has strong adaptability to inferior raw materials. As crude oil becomes heavier and the proportion of low-quality imported high-sulfur crude oil continues to increase, the coking process has received greater attention. Domestic refineries have increased the capacity expansion and transformation of coking units. At present, the processing capacity of domestic coking units has reached about 90 million tons. As the share of inferior crude oil continues to increase, the coking processing capacity will also increase. [0003] As the middle distillate product of the coking process, coker gas oil usually accounts for about 20% to 30% of the cokin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G11/00
Inventor 王刚高金森徐春明蓝兴英高浩华文尧顺
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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