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Catalytic cracking fractional and divisional transformation method and device for heavy oil

A technology of catalytic conversion and heavy oil catalysis, applied in the field of petroleum processing, can solve the problems of insufficient reaction depth of inferior raw materials, inferior quality of catalytic cracking raw materials in refineries, retardation and other problems, so as to solve the problem of increasingly inferior quality, avoid vicious adsorption competition, Yield-enhancing effect

Inactive Publication Date: 2011-06-22
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] One object of the present invention is to solve the vicious adsorption competition between the inferior raw material and the high-quality raw material in the conventional catalytic cracking riser reactor and the retardation effect on the reaction, the insufficient reaction depth of the inferior raw material in the conventional riser reactor, and the refinery The problem of increasingly inferior raw materials for catalytic cracking provides a method for catalytic cracking of heavy oil to solve the above problems and increase the yield of light oil and liquid

Method used

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  • Catalytic cracking fractional and divisional transformation method and device for heavy oil
  • Catalytic cracking fractional and divisional transformation method and device for heavy oil
  • Catalytic cracking fractional and divisional transformation method and device for heavy oil

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Embodiment 1

[0047] The present invention provides a method for heavy oil catalytic cracking fractional conversion and a device for implementing the method, please refer to figure 1 As shown, the heavy oil catalytic cracking staged conversion device in this embodiment mainly includes: a riser reactor 1, a combined reactor 2 with a turbulent bed or a fast bed plus a transport bed, an oil-gas separation system, a catalyst regenerator 4, and two Regenerated catalyst coolers 6,8. Wherein, the bottom of the riser reactor 1 is provided with a high-quality catalytic raw material inlet and a catalyst inlet, and the top is provided with a mixed material outlet of the reacted oil gas and catalyst; the combined reactor 2 is a turbulent bed or a fast bed 21 and a transport bed 22 Combined reactors in series, the turbulent bed or fast bed 21 is arranged at the bottom of the combined reactor 2, and the height is 5% to 30% of the overall height of the combined reactor 2, and the turbulent bed or fast bed...

Embodiment 2

[0051] Please refer to figure 2 As shown, wherein, the conventional riser reactor 1 (the regenerated catalyst cooler 6 is arranged between the regenerator 4 and the riser reactor 1) which is set for high-quality raw materials next to the regenerator 4 of the heavy oil catalytic cracking unit and is set for low-quality raw materials The turbulent bed or fast bed plus transport bed combination reactor 2 (regenerated catalyst cooler 8 is arranged between the regenerator 4 and the combination reactor 2) after the catalyst after the reaction and the oil-gas mixture material outlet converge at 121, the catalyst and After the oil and gas are separated by the oil and gas separator 11, the settler 10 and the top spin 13, the oil and gas are led out of the catalytic cracking reaction system, and the catalyst enters the stripping section 5 for stripping, and then enters the regenerator 4 through the catalyst delivery pipe 18 for charring regeneration. Other structures and processes of t...

Embodiment 3

[0053] Please refer to image 3 As shown, among them, the conventional riser reactor 1 set for high-quality raw materials next to the regenerator 4 of the heavy oil catalytic cracking unit and the turbulent bed or fast bed plus transport bed combination reactor 2 set for low-quality raw materials, and in the regenerator 4 A regenerated catalyst cooler 6 is arranged between the riser reactor 1 and the combination reactor 2 . The high-temperature catalyst in the regenerator 4 enters the regenerated agent cooler 6 through the catalyst delivery pipe 70, passes into the cooling medium through 61, and flows out through 62, and reduces a part of the regenerated catalyst with a temperature of 680-710°C to 580-670°C, and then Enter the riser reactor 1 through the regenerated inclined pipe 71 and the regenerated catalyst slide valve 7, and flow upward under the lifting action of the lifting gas 16 to contact and react with high-quality catalytic raw material oil 15 (the carbon residue v...

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Abstract

The invention provides a catalytic cracking fractional and divisional transformation method and device for heavy oil. The method comprises the following steps of: classifying heavy oil raw materials into a high grade catalytic raw material and an ungraded catalytic raw material according to the difference between reaction properties, wherein a riser reactor is taken as the reaction area of the high grade catalytic raw material, and a combined reactor consisting of a turbulent bed or a fast bed and a conveying bed is taken as the reaction area of the ungraded catalytic raw material; undergoing a reaction under respectively optimized process conditions of low-dose oil contact temperature difference and high-dose oil ratio; separating reacted oil gas from a catalyst; leading the oil gas out of a reaction system; and introducing the catalyst into a catalyst regenerator for scorching and regenerating. The invention also provides a device for implementing the catalytic cracking fractional and divisional transformation method. In the method, malignant adsorption competition between the ungraded raw material and the high grade raw material in the conventional riser reactor and retardation on the reactions are effectively avoided, the problem of insufficient reaction deepness of the ungraded raw material is solved, and the yields of clean oil and liquid are remarkably increased.

Description

technical field [0001] The present invention relates to a method for catalytic conversion of heavy oil and a device for implementing the method, in particular to a method and device for performing hierarchical and partitioned conversion of heavy oil to improve the efficiency of catalytic cracking reaction of heavy oil, which belongs to petroleum processing technology field. Background technique [0002] Catalytic cracking process is the main means of lightening heavy oil and an important production process of light oil products such as liquefied petroleum gas, gasoline and diesel. As crude oil becomes heavier and inferior, it has become an important plan for refineries to process heavy feedstock oil such as atmospheric heavy oil, vacuum residue and deasphalted residue by using catalytic cracking technology to improve economic efficiency. [0003] At present, for the processing of heavy raw oil, in addition to the paraffin-based vacuum (such as Daqing vacuum residue) with ex...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G51/06
Inventor 高金森王刚白跃华张兆前徐春明高浩华张冬超文尧顺蓝兴英白光
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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