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Lift-pipe reactor

A reactor and riser technology, applied in the field of riser reactors, can solve the problems that the second reaction zone is difficult to achieve the catalyst density, and the process advantages cannot be fully utilized, so as to increase the catalyst density, increase the catalyst concentration, and circulate The effect of increased strength

Active Publication Date: 2007-09-05
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Industrial experiments using this reactor have shown that this equipment can greatly reduce the olefin content in gasoline, but in industrial practice, it is found that the second reaction zone is difficult to achieve the catalyst density required in the process and design, resulting in the lack of advantages of this process. full play

Method used

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Examples

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Embodiment 1

[0039] This example illustrates the axial variation of the average density of the catalyst in the second reaction section of the riser measured by using the riser reactor shown in FIG. 3 provided by the present invention on the fluidized cold model experimental device.

[0040] The total height of the riser reactor used in the experiment is 13.5 meters, the inner diameter of the pre-lifting section is 0.25 meters, and the height is 2.5 meters; the inner diameter of the first reaction section is 0.2 meters, and the height is 4 meters; the inner diameter of the second reaction section is 0.5 meters, The height is 5 meters; the inner diameter of the outlet section is 0.2 meters, and the height is 2 meters; the cone top of the diameter expansion section between the first reaction section and the second reaction section and the diameter reduction section between the second reaction section and the outlet section The angles are all 60°; the outer diameter of the lower end of the draf...

Embodiment 2

[0042] This example illustrates the axial variation of the average density of the catalyst in the second reaction section of the riser measured through experiments using the riser reactor shown in FIG. 4 provided by the present invention on the fluidized cold model experimental device.

[0043] The total height of the riser reactor used in the experiment is 13.5 meters, the inner diameter of the pre-lifting section is 0.25 meters, and the height is 2.5 meters; the inner diameter of the first reaction section is 0.2 meters, and the height is 4 meters; the inner diameter of the second reaction section is 0.5 meters, The height is 5 meters; the inner diameter of the outlet section is 0.2 meters, and the height is 2 meters; the cone top of the diameter-expanding section between the first reaction section and the second reaction section and the shrinking section between the second reaction section and the outlet section The angles are all 90°; the height of the frustum-shaped draft ...

Embodiment 3

[0045] This example illustrates how the average density of the catalyst in the second reaction section of the riser varies along the axial direction measured through experiments using the riser reactor shown in FIG. 6 provided by the present invention on the fluidized cold model experimental device.

[0046] The total height of the riser reactor used in the experiment is 13.5 meters, the inner diameter of the pre-lifting section is 0.25 meters, and the height is 2.5 meters; the inner diameter of the first reaction section is 0.2 meters, and the height is 4 meters; the inner diameter of the second reaction section is 0.5 meters, The height is 5 meters; the inner diameter of the outlet section is 0.2 meters, and the height is 2 meters; the cone angle of the expanding section connecting the first reaction section and the second reaction section is 60°, and the The cone angles of the reduced diameter sections between them are all 120°; the total height of the combined draft pipe is...

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Abstract

A lift-pipe reactor is composed of such units from bottom to top as pre-lifting segment, the first reaction segment, the second reaction segment, and optional discharging segment. It features that a flow guiding pipe is arranged at lower part of the second reaction segment to decrease the gas flow speed in its wall region for generating a dense phase region of catalyst, so increasing the concentration of catalyst in second reaction segment.

Description

technical field [0001] The invention belongs to the apparatus for the catalytic conversion of hydrocarbon oils in the absence of hydrogen, more specifically, the invention is a riser reactor for fluidized catalytic conversion. Background technique [0002] At present, the conventional catalytic cracking reaction-regeneration system generally adopts the equal-diameter riser reactor. The preheated raw oil enters the riser reactor through the feed nozzle, contacts with the high-temperature catalyst from the regenerator, vaporizes, and reacts. The catalyst flows upwards along the riser at an average linear velocity of about 10 m / s, reacts while flowing, and takes about 3 seconds. During the reaction process, coke is continuously generated and deposited on the surface of the catalyst and the active center, which makes the activity and selectivity of the catalyst drop sharply. For this reason, the coked catalyst must be separated from the reaction oil and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J8/24C10G11/18
Inventor 侯栓弟龙军许克家张久顺张占柱许友好何峻武雪峰
Owner CHINA PETROLEUM & CHEM CORP
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