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Lift pipe reactor

A riser and reactor technology, which is applied in chemical instruments and methods, petroleum industry, cracking, etc., can solve the problems such as the distribution phenomenon of ring nucleus, achieve good industrial practicability, improve dispersion, and make small changes to the device

Inactive Publication Date: 2012-10-31
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is mainly aimed at the fact that solid particles slide down along the side wall of the riser when the existing riser reactor is used for reaction, so that the solid particles appear along the radial direction of the riser. distribution phenomenon, provide a riser reactor that can resist slipping, to basically eliminate the sliding of solid particles along the side wall of the riser during the reaction, and avoid the occurrence of "ring core" distribution phenomenon

Method used

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Embodiment 1

[0033] See Figure 1A and Figure 1B As shown, in the riser reactor of this embodiment, the riser (anti-slip riser) is composed of a riser outer pipe 1 and an inner wall lining 2 . The inner wall lining 2 is prefabricated with an anti-slide inner member 3 formed thereon, and the anti-slide inner member in this embodiment is a plurality of annular ribs 3 arranged in the axial direction. Annular rib 3 can be made of wear-resistant lining, or lining and tortoise shell net molding, also can be made of tortoise shell net and lining plus steel structure or other wear-resistant materials.

[0034] In this embodiment, each annular rib 3 is arranged horizontally along the inner wall of the riser in the riser, and the annular rib 3 can be arranged continuously on the inner wall, such as Figure 1A shown; it can also be arranged one or several intervals at intervals, such as Figure 1B shown. The distance H between the upper and lower adjacent annular ribs 3 can be 0-30 times of the in...

Embodiment 2

[0040] See Figure 3A and Figure 3B As shown, the structure of the anti-slip riser in this embodiment is illustrated, Figure 4 The partial enlarged structure of the anti-slip riser is shown. In the riser reactor in this embodiment, the cross-sectional shape of the rib 3 is an arc composed of a straight line e (dotted line e shown in the figure) and an arc edge f, and the arc edge f can be a circle , a part of the circumference of an ellipse, or any arc shape. The thickness h, height a, and distance H between the upper and lower adjacent ribs 3 and other designs are the same as those in the first embodiment.

Embodiment 3

[0042] Figure 5A , Figure 5B , Figure 5C Another arrangement of the anti-slide inner member (rib) 3 is shown, wherein, Figure 5A It shows the arrangement form of the ribs in the height direction of the riser in the anti-slip riser of this embodiment, Figure 5B and Figure 5C The two cross-sections of the adjacent two layers of ribs in the height direction of the anti-slip riser of this embodiment are shown respectively. It can be seen from the figure that the internal member 3 in this embodiment is a multi-section rib with a certain radian and a substantially triangular cross-section arranged intermittently along the circumference of the riser. The ribs 3 form an unclosed ring, and the convex ribs of each layer are arranged alternately in the height direction of the riser. Also, the effect of basically avoiding the occurrence of ring core structure phenomenon in the riser during the reaction can be achieved. The thickness h, height a, and distance H between the uppe...

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Abstract

The invention relates to a riser reactor. An anti-slide internal component is arranged on the inner wall of the riser of the reactor. The anti-slide internal component comprises ribs along the circumference of the inner wall of the riser, and at least one of the ribs is arranged in the height direction of the riser. Through the structural design, the riser reactor can prevent solid particles fromsliding along the edge and the wall, and prevent the concentration of solid particles on the section of the riser from being too low in the middle, and the concentration of solid particles on the section of the riser from being too high near the edge and the wall when being used in reaction; flat flow is achieved in the riser so that the concentration of the solid particles tends to be consistentwith the dwell time, which facilitates reaction inside the riser reactor.

Description

technical field [0001] The present invention relates to a riser reactor, in particular to a riser that eliminates the "ring core" structure phenomenon in which solid particles in the reaction are concentrated along the radial direction of the riser on the side wall and thin in the middle by setting an anti-slip inner member reactor. Background technique [0002] The riser reactor is one of the most important processes in the refining and chemical process—especially the core component of the catalytic cracking process. The traditional riser reactor usually has a cylindrical riser, and its working process is as follows: the pre-lift steam and the catalyst from the regenerator enter from the lower part of the riser, are driven by the pre-lift steam to move upward, and are injected through the feed section. Atomized raw oil, after gasification, the raw oil flows upward together with the catalyst and enters the main reaction zone. After a certain distance, the vortex generated ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J8/24C10G9/14
Inventor 毛羽高金森徐春明王娟王刚
Owner CHINA UNIV OF PETROLEUM (BEIJING)