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Riser reactor

A reactor and riser technology, which is applied in the field of hydrocarbon feedstock catalytic cracking riser reactors, can solve the problems that cannot meet the cooling requirements of regenerated catalysts, etc.

Inactive Publication Date: 2005-08-03
石宝珍
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The existing riser reactor obviously cannot meet the cooling requirements of the regenerated catalyst in the oil refining process

Method used

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  • Riser reactor

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Embodiment 1

[0013] Embodiment 1. A riser reactor, comprising a reaction section 2, a catalyst heat exchange device 3 is provided in the housing of the pre-lift section 1 below the reaction section 2, a catalyst inlet pipe 4 is provided at the lower part of the side wall of the housing, and a catalyst inlet pipe 4 is provided at the lower end of the housing. There is a lifting medium to enter the pipe 5. The inner diameter of the shell of the pre-lifting section 1 is 1.1 times the inner diameter of the adjacent reaction section 2 . The heat exchange device 3 is a sleeve pipe arranged vertically along the inner side of the shell with uniform intervals, and the upper end of the sleeve pipe passes through the shell; The tube is connected, and the upper end passes through the upper end seal of the outer tube. During use, the low-temperature heat exchange medium enters from the inner tube 10 of the casing, and flows out from the outlet 9 of the outer tube 8 of the casing after absorbing heat. ...

Embodiment 2

[0014] Embodiment 2. In this embodiment, the inner diameter of the casing of the pre-lifting section 1 is 1.5 times the inner diameter of the adjacent reaction section 2 . The heat exchange device 3 is a U-shaped coil vertically arranged along the inner wall of the shell, and the inlet 6 and the outlet 7 of the coil are located on the side wall of the shell of the pre-lift section 1 . During use, the low-temperature heat exchange medium enters from the inlet 6 of the coil, and flows out from the outlet 7 of the coil after absorbing heat. Others are the same as embodiment 1

[0015] In the above two embodiments, the temperature of the regenerant can be regulated by controlling the temperature and flow rate of the low-temperature heat exchange medium.

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Abstract

The riser reactor as one petroleum refining apparatus includes reaction section, catalyst heat exchanger inside the casing below the reaction section, catalyst inlet pipe in the lower part of the casting, and riser medium inlet pipe in the lower end of the casing. The pre-riser section has casing inner diameter of 1.1-2.0 times that of adjacent reaction section. The heat exchanger may be coiled pipe set along the inside of the casing and with inlet and outlet located in the side wall below the reaction section; or vertical sleeves set along the inside of the casing, in homogeneous interval and with upper end extending beyond the casing. The riser reactor of the present invention has several purposes, and when it is used in refining cycle stock, there will be dry gas yield lowered by 50 % and coke yield lowered by 30 %.

Description

technical field [0001] The invention belongs to the technical field of petroleum refining equipment, in particular to a hydrocarbon raw material catalytic cracking riser reactor. Background technique [0002] Catalytic cracking unit is one of the important devices for secondary processing of raw oil in refinery. In the catalytic cracking unit, the gas-solid phase cracking reaction of the hydrocarbon feedstock occurs in the presence of the catalyst, and the high-temperature catalyst reenters the catalytic cracking unit to play a catalytic role after being regenerated. The riser reactor is the core equipment of the catalytic cracking unit. The existing riser reactor includes a pre-lift section and a reaction section. The regenerated catalyst enters the pre-lift section from the catalyst inlet, and enters the reaction section to play a role under the lift of the pre-lift medium. For recycled oil, due to the low boiling point of the components, its gasification is quite easy an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J8/06
Inventor 石宝珍
Owner 石宝珍
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