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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

Active Publication Date: 2005-11-09
SINOPEC LUOYANG PETROCHEM ENG CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is: the second half of the riser reactor in the existing riser catalytic cracking device has poor catalytic effect, and the temperature is high, which aggravates the problem of thermal cracking reaction effect; and the existing two The activity of the catalyst in the first reaction stage in the stage riser reactor has not been fully utilized, the stripping effect is affected by the limited amount of stripping steam, the process is complicated, and the operation difficulty is increased, etc.

Method used

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  • Lift pipe catalytic cracking method and device

Examples

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Effect test

Embodiment 1

[0042] This example illustrates the results of catalytic cracking using Daqing atmospheric residue as feedstock oil. The distance from the catalyst inlet of the second reaction section (that is, the catalyst inlet in the middle of the riser reactor) to the catalyst inlet at the bottom of the riser reactor is 50% of the total length of the riser reactor. Table 2 gives the specific data of product distribution and gasoline quality, and the comparative data of conventional riser is also given in the table.

[0043]The operating conditions adopted in this embodiment are: the regeneration temperature of the first regenerator is 700°C, the carbon content of the regenerated semi-regenerated catalyst is 0.25w%, and the carbon content of the semi-regenerated catalyst entering the first reaction section from the bottom of the riser reactor is The temperature is 700°C. The regeneration temperature of the second regenerator is 520°C, the carbon content of the regenerated catalyst is 0.05...

Embodiment 2

[0047] This example illustrates the cracking results using Zhongyuan Atmospheric Residue as feedstock oil. The difference from Example 1 is that the distance from the catalyst inlet of the second reaction zone to the catalyst inlet at the bottom of the riser reactor is 40% of the total length of the riser reactor.

[0048] The operating conditions used in this embodiment are: the regeneration temperature of the first regenerator is 705°C, the carbon content of the regenerated semi-regenerated catalyst is 0.20w%, and the carbon content of the semi-regenerated catalyst entering the first reaction section from the bottom of the riser reactor is The temperature was 705°C. The regeneration temperature of the second regenerator is 510°C, the carbon content of the regenerated catalyst is 0.05w%, and the temperature of the regenerated catalyst entering the second reaction section of the riser reactor is 510°C. The reaction conditions of the first reaction section of the riser reactor...

Embodiment 3

[0054] This example illustrates the cracking results of using the atmospheric residual oil from the Luning pipeline as the feedstock. The distance from the catalyst inlet of the second reaction section to the catalyst inlet at the bottom of the riser reactor is 65% of the total length of the riser reactor.

[0055] The operating conditions used in this embodiment are: the regeneration temperature of the first regenerator is 705°C, the carbon content of the regenerated semi-regenerated catalyst is 0.20w%, and the carbon content of the semi-regenerated catalyst entering the first reaction section from the bottom of the riser reactor is The temperature was 705°C. The regeneration temperature of the second regenerator is 510°C, the carbon content of the regenerated catalyst is 0.05w%, and the temperature of the regenerated catalyst entering the second reaction section of the riser reactor is 510°C. The reaction conditions of the first reaction section of the riser reactor are as ...

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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.

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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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G11/00C10G11/18
Inventor 陈俊武王龙延王国良刘现峰张振千汤海涛赵东明刘振军
Owner SINOPEC LUOYANG PETROCHEM ENG CORP
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