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Rapid separation equipment for catalytic cracking riser outlet

A catalytic cracking and riser technology, applied in the fields of fluidized catalytic cracking and petrochemical industry, can solve the problems of large system occupied space, low separation efficiency of oil and gas and catalyst, coking and other problems

Active Publication Date: 2017-08-04
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The invention provides a quick separation device at the outlet of the catalytic cracking riser to solve the problems of low separation efficiency of oil gas and catalyst, large system occupation space and serious coking in the existing rapid separation device at the outlet of the catalytic cracking riser

Method used

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  • Rapid separation equipment for catalytic cracking riser outlet
  • Rapid separation equipment for catalytic cracking riser outlet
  • Rapid separation equipment for catalytic cracking riser outlet

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] Such as figure 1 As shown, the oil gas and catalyst particles at the outlet of the riser 13 are sprayed out by the swirl arm with the splitter tube 1 and the splitter baffle 3 swirl quick splitter 2, and then rotate rapidly in the closed cover 10 to quickly separate the two phases of the oil agent , the separated catalyst particles rotate and flow downward along the side wall of the closed cover, and enter the inner ring between the circulating tube 17 of the dense-phase circulating pre-stripping device and the outer wall of the riser through the conical blanking stripping baffle 18, and the inner ring Under the action of the stripping steam air pipe 16, the density difference between the inner and outer rings of the circulation cylinder realizes the dense-phase circulation pre-stripping of the catalyst particles, and the catalyst particles after the pre-stripping enter the lower stripping section and pass through the disc ring baffle. 15 and under the effect of strippi...

Embodiment 2

[0057] Such as figure 2 As shown, the implementation process of the second embodiment is similar to that of the first embodiment. There are two main differences between embodiment two and embodiment one. One is that embodiment two adopts a plurality of slots 90 arranged on the closure cover 10 to replace the balance tube 9 provided in the settler in embodiment one, and the number of slots 90 The axial position is between the conical blanking stripping baffle 18 and the circulation cylinder 17, so that the structure is simpler, the space is more compact, and it is more conducive to reducing coking in the settler. The oil gas and stripping steam from the stripping section enter the closed cover through the slot, and then enter the draft tube after passing through the conical stripping baffle plate and the splitter tube. The second is that embodiment two sets the outer ring stripping steam air duct at the outer ring of the circulating pre-stripping device, and replaces the inne...

Embodiment 3

[0059] Such as image 3 As shown, the implementation technological process of embodiment three is similar to embodiment two, and the two are different: embodiment three is not in the enclosure, and the outer ring of the circulation pre-stripping device is provided with the outer ring stripping steam air duct 19 , the structure is relatively simple. In order to achieve relatively smooth dense-phase circulating flow, the inventor has obtained the inner ring cross-sectional area and the outer ring cross-sectional area (the inner ring cross-sectional area between the circulating tube and the outer wall of the riser) of the dense-phase circulating pre-stripper through long-term experiments and calculations. The ratio of the area to the cross-sectional area of ​​the outer ring between the circulating cylinder and the closed cover) is between 0.3 and 0.4 (this can make the catalyst form a smooth dense-phase circulating flow and improve the operating flexibility of the dense-phase cir...

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Abstract

The invention provides a quick separation device at an outlet of a catalytic cracking riser. The device comprises a reactor shell, the riser extending into the reaction shell, a rotational flow quick separation head arranged in the reactor shell and connected to the top end of the riser, and a gas-solid dense phase circulation pre-stripping device arranged in the reaction shell and connected to the lower side of the rotational flow quick separation head, wherein the riser is sleeved with the gas-solid dense phase circulation pre-stripping device. By the adoption of the device, efficient and quick separation of oil gas and a catalyst, quick extraction of oil gas and efficient pre-stripping of the catalyst can be achieved, the occupied space of the device can be effectively reduced, the size of a settler can be reduced, and the coking area in the settler can be reduced.

Description

technical field [0001] The invention relates to the field of petrochemical technology, in particular to the field of fluidized catalytic cracking technology, in particular to rapid gas-solid separation at the outlet of a catalytic cracking riser in fluidized catalytic cracking equipment and rapid separation at the outlet of a riser with a dense-phase circulation pre-stripping section System, that is, a rapid separation device for the outlet of the catalytic cracking riser. Background technique [0002] The riser outlet of the catalytic cracking unit in oil refining and chemical industry generally has a gas-solid rapid separation device to realize the rapid separation of catalyst and oil and gas, the rapid extraction of oil and gas, stop unnecessary reactions, increase the yield of target products, reduce production costs, and increase benefits. In addition, it is necessary to perform rapid pre-stripping on the catalyst separated from the quick separation device to recover pa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G11/00B01J8/24
CPCB01J8/24B01J2208/00761C10G11/00
Inventor 卢春喜黄世平鄂承林
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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