Coupling equipment for realizing temperature adjustment and stripping of catalytic cracking regenerant

A technology of catalytic cracking and coupled equipment, applied in catalytic cracking, cracking, petroleum industry, etc., can solve the problems of large amount of stripping steam, complex stripper structure, high energy consumption, etc., to improve heat extraction and heat exchange efficiency, Effect of suppressing deactivation effect and enhancing heat transfer efficiency

Inactive Publication Date: 2010-06-30
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be seen that, in order to realize the cooling of the catalyst while efficiently stripping, the above two prior patents require a large amount of stripping steam for the catalyst, and require the stripping process of the catalyst to run through the process of the catalyst passing through the stripper.

Method used

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  • Coupling equipment for realizing temperature adjustment and stripping of catalytic cracking regenerant
  • Coupling equipment for realizing temperature adjustment and stripping of catalytic cracking regenerant
  • Coupling equipment for realizing temperature adjustment and stripping of catalytic cracking regenerant

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0042] Example one

[0043] figure 1 A schematic diagram of a coupling device that can realize temperature adjustment and stripping of a catalytic cracking regenerator is provided. As shown in the figure, the regenerant temperature regulating and stripping coupling device includes a two-stage structure, the upper part is the regenerant temperature regulating section 5, and the lower part is the regenerant stripping section or flue gas degassing section 2. The temperature adjustment section 5 has a cylindrical body in which a number of heat-taking tubes 4 are provided as heat exchange components. The upper part of the cylindrical body is respectively provided with a regenerant inlet 20 and a mixed gas outlet 30. The specific form of the heat pipe 4 can be a commonly used vertical finned tube, a squirrel-cage heat exchange tube or a nail-head heat exchange tube, etc., and you can refer to the description and drawings in the aforementioned Chinese patents 200410083890.3 and 20041008...

Example Embodiment

[0048] Example two

[0049] See figure 2 The difference between the scheme of this embodiment and the first embodiment is that a section of annular flow isolation sleeve 8 is provided in the upper temperature control section 5 of the regenerant temperature control and stripping coupling device, which divides the cross section of the temperature control section 5 into a central flow area (Inner ring area) and outer ring circulation area, image 3 It is a schematic diagram of the cross-sectional structure along the A-direction. The heat pipe is arranged along the wall of the spacer sleeve. The area ratio of the central flow area I and the outer ring flow area II can be 0.5-2. Such as figure 2 As shown, two air distributors are provided at the bottom of the temperature adjustment section 5 to provide fluidized air for the central ring and the outer ring respectively. The central area air distributor 6 can be an annular tube type distributor or a plate type distributor (a plate typ...

Example Embodiment

[0052] Example three

[0053] Refer to the scheme of this embodiment Figure 4 , The difference from the second embodiment is that two annular spacer sleeves 9 and 10 are arranged in the upper temperature regulating section 5 of the regenerant temperature regulating and stripping coupling device. The two stages of spacer sleeves are along the temperature regulating section. The axial direction is set up and down (see section structure image 3 ), leave an appropriate gap d between them, and make the gap 0.1 to 1.0 times the diameter 9 and 10 of the spacer sleeve. Other parameter settings and work flow can be the same as the second embodiment.

[0054] Experimental research shows that the use of two-stage spacer sleeve design has a better effect on improving the heat transfer efficiency of the temperature adjustment section.

[0055] Similarly, this embodiment can also be changed to a three-stage or more-stage flow isolation sleeve structure.

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Abstract

The invention provides coupling equipment for realizing the temperature adjustment and the stripping of catalytic cracking regenerant, which comprises a temperature adjustment section arranged at the upper part and a stripping section arranged at the lower part; the temperature adjustment section is provided with a built-in heat exchange component and at least an air distributor; and the temperature adjustment section extends downwards and reduces the circulation area to form the stripping section. By coupling the stripping area with quite small circulation area at the lower part of the temperature adjustment section, the invention can realize the function of flue gas removal without or only with a small amount of stripping steam, and can best inhibit the inactivation of the regenerant under the steam atmosphere. The coupling equipment of the invention can be arranged in a regenerant circulating pipeline of a catalytic cracker, so that the regenerant directly enters a rise reactor after the temperature is adjusted and the flue gas is removed, thereby not only significantly improving the oil ratio, the regeneration temperature and the raw material pre-heating temperature of the catalytic cracker and facilitating the improvement of product distribution, but also having the function of glue gas removal and reducing the load of a rich gas compressor and the energy consumption of the device.

Description

technical field [0001] The present invention relates to equipment for tempering and stripping a catalytic cracking regenerant in a catalytic cracking reaction, in particular to a coupling equipment for tempering and stripping that integrates the tempering and stripping equipment for a regenerant and using the coupling equipment to The invention relates to a process for implementing temperature regulation and flue gas removal by catalytic cracking regenerant, and the invention belongs to the technical field of petrochemical industry. Background technique [0002] In the petroleum refining industry, the catalytic cracking process is one of the most important petroleum secondary processing processes. In the catalytic cracking process, heavy macromolecular petroleum hydrocarbons are cracked into small Molecular hydrocarbons become the desired light oil products. In my country, catalytic cracking is the most important means of lightening heavy oil. The vast majority of commercia...

Claims

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Application Information

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IPC IPC(8): C10G11/02
Inventor 张永民刘梦溪卢春喜王祝安
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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