Erosion control bend

Abstract

The utility model relates to the field of petroleum chemical industry discloses a kind of anti-scouring elbow, including elbow body and anti-scouring mechanism, anti-scouring mechanism is located in the vulnerable position of the outer wall of elbow body, and anti-scouring mechanism includes the accommodating cavity filled with buffer powder, and anti-scouring elbow can be set as: the vulnerable position of elbow body breaks after breaking, buffer powder can buffer the impact of airflow and particle in elbow body. By the above technical scheme, the anti-scouring mechanism of the vulnerable position of elbow body is set, when the wall of elbow body is broken by airflow and particle scouring, elbow body is communicated with accommodating cavity, and it is impacted with buffer powder in accommodating cavity, so that buffer powder and particle impact and buffer powder is raised and particle collides, partial exchange occurs, continues to discharge along the original airflow and particle movement route, so that anti-scouring elbow can continue to use after elbow body breaks, until buffer powder in accommodating cavity is used up, greatly prolongs service life.

Description

Technical Field

[0001] This utility model relates to the petrochemical field, specifically to an anti-erosion elbow. Background Technology

[0002] In the production of ethylene plants, there is a coking condition, which produces a large amount of coking gas mixed with solid coke particles and steam. When the coking gas is running normally, it will cause severe erosion at the bends of the coking pipeline, resulting in perforation and damage to the bends. The service life of the bends is short, and the pipeline will fail immediately after the bend is damaged. Therefore, there is an urgent need for a method to extend the service life of the pipeline. Utility Model Content

[0003] The purpose of this invention is to overcome the problems in the existing technology where solid coke particles and coking gas from steam cause severe erosion at the bends of pipelines, resulting in short service life of the bends and immediate pipeline failure after bend damage.

[0004] To achieve the above objectives, this utility model provides an anti-erosion elbow, including an elbow body and an anti-erosion mechanism. The anti-erosion mechanism is located at a vulnerable position on the outer wall of the elbow body. The anti-erosion mechanism includes a receiving cavity filled with buffer powder. The anti-erosion elbow can be configured such that after the vulnerable position of the elbow body is damaged, the buffer powder can buffer the impact of airflow and particles in the elbow body.

[0005] In some embodiments, the elbow body includes an inlet and an outlet, and an anti-scouring mechanism is located at the outer arc of the elbow body.

[0006] In some embodiments, the anti-scouring mechanism includes a straight pipe connected to the outer wall of the elbow body and parallel to the flow direction at the inlet of the elbow body, with the internal cavity of the straight pipe forming a receiving cavity.

[0007] In some embodiments, a sealing end cap is provided at the end of the straight pipe away from the elbow body.

[0008] In some embodiments, the buffer powder is corundum powder.

[0009] In some embodiments, the receiving cavity is provided with a support for supporting the buffer powder.

[0010] In some embodiments, the support includes a helical bend.

[0011] In some embodiments, the outer surface of the helical bend is provided with protrusions.

[0012] In some embodiments, a support frame is provided at the end of the receiving cavity away from the elbow body, one end of the spiral bent rod is fixed to the support frame, and the other end extends toward the interior of the receiving cavity.

[0013] In some embodiments, the helical angle of the helical bend gradually increases in the direction toward the bend body.

[0014] Through the above technical solution, this application provides an anti-erosion mechanism at a vulnerable location on the elbow body. When the wall of the elbow body is damaged by airflow and particles, the elbow body connects with the receiving cavity of the anti-erosion mechanism and impacts the buffer powder in the receiving cavity. This causes the buffer powder to collide with the particles, resulting in partial exchange of buffer powder, which then continues to be discharged along the original airflow and particle movement path. The anti-erosion elbow of this invention can continue to be used after the elbow body is damaged until the buffer powder in the receiving cavity is exhausted, greatly extending its service life. Attached Figure Description

[0015] Figure 1 This is an overall view of the anti-scouring elbow of this utility model embodiment; Figure 2 This is a perspective view of the anti-erosion elbow of this utility model embodiment after removing the flange cover.

[0016] Explanation of reference numerals in the attached figures 1. Elbow body; 11. Inlet; 12. Outlet; 2. Anti-erosion mechanism; 21. Receiving cavity; 22. Buffer powder; 23. Straight pipe; 24. Support component; 241. Spiral bent rod; 242. Support frame; 243. Protrusion; 25. Sealing end cap. Detailed Implementation

[0017] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of this utility model.

[0018] In this invention, unless otherwise stated, directional terms such as "up," "down," "left," "right," "inner," and "outer" are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0019] To address the problems in existing technologies where solid coke particles and coking gases from steam cause severe erosion at pipeline bends, resulting in short bend lifespans and immediate pipeline failure upon bend damage, this invention provides an anti-erosion bend, such as... Figure 1As shown, the anti-erosion elbow includes an elbow body 1 and an anti-erosion mechanism 2. The anti-erosion mechanism 2 is located at a vulnerable position on the outer wall of the elbow body 1, and includes a receiving cavity 21 filled with buffer powder 22. The anti-erosion elbow of this invention is configured such that after the vulnerable position of the elbow body 1 is damaged by the impact of airflow and particles, the elbow body 1 connects with the receiving cavity 21 of the anti-erosion mechanism 2. The airflow and particles impact and collide with the buffer powder 22, causing the buffer powder 22 to be lifted. Furthermore, some of the buffer powder 22 exchanges position with the particles and enters the elbow body 1, exiting along the original flow direction of the airflow and particles in the elbow body 1, thereby buffering the impact of the airflow and particles in the elbow body 1.

[0020] Through the above technical solution, this application provides an anti-erosion mechanism 2 at a vulnerable location of the elbow body 1. When the wall of the elbow body 1 is damaged by airflow and particles, the elbow body 1 connects to the receiving cavity 21 of the anti-erosion mechanism 2. The buffer powder 22 in the receiving cavity 21 impacts and buffers the impact of the airflow and particles in the elbow body 1, allowing the elbow body 1 to continue to be used after damage until the buffer powder 22 in the receiving cavity 21 is exhausted. The pipeline will not immediately leak or fail after the elbow body 1 is damaged, greatly extending its service life. It is understood that the anti-erosion elbow of this utility model, taking the coke gas operating pipeline in an ethylene cracking production unit as an example, can extend the service life of the coke gas operating pipeline, but this is not to be construed as a limitation on the application scenarios of the anti-erosion elbow of this utility model. The anti-erosion elbow of this utility model can be applied to any scenario involving the presence of particulate flow and / or airflow erosion in the pipeline.

[0021] In some embodiments, such as Figure 1 and Figure 2 As shown, the elbow body 1 includes an inlet 11 and an outlet 12, and the anti-scouring mechanism 2 is located at the outer arc of the elbow body 1. The outer arc of the elbow body 1 is a position opposite to the bending direction of the elbow body 1. The outer arc of the elbow body 1 is a vulnerable position. When airflow and particles enter the elbow body 1 through the inlet 11, they will continue to move in the original direction, thus impacting the outer arc of the elbow body 1, making it a vulnerable position. Therefore, placing the anti-scouring mechanism 2 at the outer arc of the elbow body 1 can greatly prevent pipeline leakage.

[0022] In some embodiments, such as Figure 1 and Figure 2As shown, the anti-erosion mechanism 2 includes a straight pipe 23, which is connected to the outer wall of the elbow body 1 and parallel to the flow direction at the inlet of the elbow body 1. The internal cavity of the straight pipe 23 forms a receiving cavity 21. When the outer arc of the elbow body 1 is damaged, the airflow and particles directly enter the straight pipe 23 along the original flow direction and impact the buffer powder 22. The straight pipe 23 has a standard shape that is easy to obtain, low in cost, and easy to process. Of course, the shell of the anti-erosion mechanism 2 can also be set to other shapes, such as a spherical or square shape. The connection between the straight pipe 23 and the elbow body 1 can be cut into a saddle-shaped notch that conforms to the shape of the outer wall of the elbow body 1, and then welded to the outer wall of the elbow body 1.

[0023] In some embodiments, such as Figure 1 As shown, a sealing end cap 25 is provided at the end of the straight pipe 23 away from the elbow body 1, forming a closed receiving cavity 21 in the straight pipe 23 to prevent leakage. The sealing end cap 25 is preferably a flange cap, which is convenient to remove when the machine is stopped to observe the usage of the buffer powder 22 in the straight pipe 23. It needs to be replaced and replenished in time when it is used up.

[0024] In some embodiments, the buffer powder 22 is corundum powder. Corundum is heat-resistant and has good chemical stability, thus it can be used in the anti-erosion elbow of this application under high-temperature conditions. In other alternative embodiments, the buffer powder 22 may also be quartz powder.

[0025] In some embodiments, such as Figure 2 As shown, the receiving cavity 21 is provided with a support member 24 for supporting the buffer powder 22. There is friction between the support member 24 and the buffer powder 22, which increases the strength of the buffer powder 22 in the receiving cavity 21, making the buffer powder 22 fill the receiving cavity 21 more compactly, preventing more buffer powder 22 from being lifted and lost under the impact of airflow and particles, and extending the service life of the anti-erosion mechanism 2.

[0026] In some embodiments, such as Figure 2 As shown, the support member 24 includes a support component, which is a helical bent rod 241. Setting the support component in a helical shape increases the contact area and friction with the buffer powder 22, resulting in higher filling strength of the buffer powder 22. The helical bent rod 241 can be made of a high-temperature resistant metal, or materials such as ceramic or glass. In other alternative embodiments, the support component can have other shapes, such as radiating outwards from the central rod.

[0027] In some embodiments, two spiral bends 241 may be provided, with opposite spiral directions, to further increase the filling strength of the buffer powder 22.

[0028] In some embodiments, the outer surface of the helical bent rod 241 is provided with protrusions 243. The protrusions 243 are arranged radially on the outer surface of the helical bent rod 241, and there are multiple protrusions, which can increase the contact area between the helical bent rod 241 and the buffer powder 22, and increase the filling strength of the buffer powder 22.

[0029] In some embodiments, such as Figure 2 As shown, a support frame 242 is provided in the end of the receiving cavity 21 away from the elbow body 1. The support frame 242 is connected to the inner wall of the straight pipe 23 and is used to support and fix the spiral bent rod 241. One end of the spiral bent rod 241 is fixed to the support frame 242, and the other end extends toward the interior of the receiving cavity 21.

[0030] In some embodiments, the spiral bend 241 gradually increases in helix angle along the direction toward the elbow body 1, that is, the spiral gradually becomes sparser. This arrangement makes the buffer powder 22 on the side of the receiving cavity 21 closer to the elbow body 1 relatively loosely filled, making it easy to replenish the buffer powder 22 after use, while the buffer powder 22 on the side farther away from the elbow body 1 is relatively tightly filled, preventing airflow and particles from damaging the anti-erosion mechanism 2.

[0031] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings; however, the present invention is not limited thereto. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, including the combination of various specific technical features in any suitable manner. To avoid unnecessary repetition, the present invention will not describe the various possible combinations separately. However, these simple modifications and combinations should also be considered as the content disclosed in the present invention and are all within the protection scope of the present invention.

Claims

1. An anti-erosion elbow, characterized in that, The elbow includes a body (1) and an anti-erosion mechanism (2). The anti-erosion mechanism (2) is located at a vulnerable position on the outer wall of the elbow body (1). The anti-erosion mechanism (2) includes a cavity (21) filled with buffer powder (22). The anti-erosion elbow can be configured such that after the vulnerable position of the elbow body (1) is damaged, the buffer powder (22) can buffer the impact of airflow and particles in the elbow body (1).

2. The anti-erosion elbow according to claim 1, characterized in that, The elbow body (1) includes an inlet (11) and an outlet (12), and the anti-scouring mechanism (2) is located at the outer arc of the elbow body (1).

3. The anti-erosion elbow according to claim 1, characterized in that, The anti-scouring mechanism (2) includes a straight pipe (23), which is connected to the outer wall of the elbow body (1) and is parallel to the flow direction at the inlet of the elbow body (1). The internal cavity of the straight pipe (23) forms the receiving cavity (21).

4. The anti-erosion elbow according to claim 3, characterized in that, The straight pipe (23) is provided with a sealing end cap (25) at the end away from the elbow body (1).

5. The anti-erosion elbow according to claim 1, characterized in that, The buffer powder (22) is corundum powder.

6. The anti-erosion elbow according to claim 1, characterized in that, The cavity (21) is provided with a support (24) for supporting the buffer powder (22).

7. The anti-erosion elbow according to claim 6, characterized in that, The support member (24) includes a helical bent rod (241).

8. The anti-erosion elbow according to claim 7, characterized in that, The outer surface of the spiral bend (241) is provided with protrusions (243).

9. The anti-erosion elbow according to claim 7, characterized in that, A support frame (242) is provided in one end of the receiving cavity (21) away from the elbow body (1). One end of the spiral bent rod (241) is fixed to the support frame (242), and the other end extends toward the interior of the receiving cavity (21).

10. The anti-erosion elbow according to claim 7, characterized in that, The spiral bend (241) gradually increases in helix angle along the direction toward the bend body (1).

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