A ceramic tube reactor seal assembly

Abstract

The utility model relates to chemical experiment equipment field especially ceramic tubular reactor, specifically ceramic tubular reactor sealing assembly, solve the problem of poor sealing of ceramic tubular reactor shell interlayer cavity and easy leakage in prior art through the clamping sealing ring between the limiting boss and the compression plate, improve the stability of sealing, avoid the hydraulic pressure of heat exchange medium to cause sealing failure, including special ceramic column, the outside wall of special ceramic column is equipped with the shell, the inner wall of shell is equipped with annular limiting boss at the position close to both ends, the area between two limiting bosses is the actual working area of interlayer cavity, each limiting boss is equipped with annular compression plate on the side away from the interlayer cavity, the limiting boss and compression plate are clamped with sealing ring.

Description

Technical Field

[0001] This utility model relates to the field of chemical experimental equipment, and in particular to ceramic tubular reactors, specifically to a sealing assembly for a ceramic tubular reactor. Background Technology

[0002] In the prior art, document CN220780359U discloses a ceramic high-temperature, high-pressure, corrosion-resistant tubular reactor, which includes a reactor body. The reactor body is a special ceramic column, and multiple vertically distributed reaction channels are provided within the reactor body. The beginning and end of all reaction channels are connected in series. The top of the reactor body has a feed pipe connecting to the reaction channels, and the bottom has a discharge pipe connecting to the reaction channels. A jacketed cavity is provided on the outside of the reactor body, with a medium inlet pipe on one side and a medium outlet pipe on the other side. Special ceramic sealing plates are fitted at both the top and bottom of the reactor body. To ensure a tight fit between the special ceramic sealing plates and the reactor body, metal heads are also provided on the outside of the special ceramic sealing plates. Flanges are provided on the outside of both the top and bottom ends of the reactor body, and the metal heads are fastened to the corresponding flanges by multiple bolts. The reactor body is made of a special ceramic material that is resistant to high temperature and corrosion, capable of withstanding almost all corrosive media, and resistant to high temperature and high pressure (around 200℃ and 5MPa).

[0003] However, the existing technology has a drawback: its jacket cavity is formed by the outer shell and the reactor body. The end sealing structure of the outer shell and the reactor body is close to an annular plate. As the heat exchange medium circulates in, the annular plate is prone to deformation under hydraulic impact, which leads to leakage in the jacket cavity and thus affects the reactor's operating progress. Utility Model Content

[0004] This invention provides a sealing assembly for a ceramic tubular reactor, which solves the problem of poor sealing and easy leakage in the outer shell jacket cavity of the existing ceramic tubular reactor. By clamping the sealing ring between the limiting boss and the pressing plate, the sealing stability is improved, and the hydraulic pressure of the heat exchange medium is prevented from causing the seal to fail.

[0005] This utility model is achieved through the following technical solution: A ceramic tubular reactor sealing assembly includes a special ceramic column, an outer shell fitted on the outer wall of the special ceramic column, a sandwich cavity formed between the outer shell and the special ceramic column, sealing plates at both ends of the special ceramic column, and end caps on the outer sides of the sealing plates. The inner wall of the outer shell is provided with annular limiting protrusions near both ends, and the area between the two limiting protrusions is the actual working area of ​​the interlayer cavity. Each limiting boss is provided with an annular clamping plate on the side away from the interlayer cavity, and a sealing ring is clamped between the limiting boss and the clamping plate; The outer ends of the outer shell are provided with first flanges, and the end cap is fixedly connected to the corresponding first flange.

[0006] Furthermore, the end of the clamping plate away from the interlayer cavity is fixed to the inner side of the end cap.

[0007] Furthermore, a second flange is provided between the end cap and the first flange, and the second flange is fixedly connected to the first flange in a detachable manner. The end of the clamping plate away from the interlayer cavity is fixed to the second flange.

[0008] Furthermore, the sealing ring has a circular cross-section, and the clamping surfaces of the limiting boss and the clamping plate are designed as arc-shaped surfaces.

[0009] Furthermore, the end cap is fixedly connected to the corresponding first flange via multiple bolt posts. The second flange is provided with a light hole that allows the bolt posts to pass through. A clamping nut is threaded onto the bolt post, and the clamping nut is used to press the second flange onto the first flange.

[0010] Furthermore, the sealing plate is sintered integrally with the end face of the special ceramic column.

[0011] Furthermore, the inner side of the sealing plate is provided with an annular sealing groove, and a sealing gasket is provided in the annular sealing groove. Under the action of the sealing head, the sealing plate is pressed against the end face of the special ceramic column.

[0012] Furthermore, the special ceramic column is made of silicon carbide material.

[0013] The beneficial effects achieved by this utility model compared with the prior art are as follows: 1. Between the surgical tube and the reactor body, each limiting boss is provided with an annular clamping plate on the side away from the interlayer cavity. A sealing ring is clamped between the limiting boss and the clamping plate, which greatly improves the stability of the seal and avoids the problem of the seal being damaged by the hydraulic pressure of the heat exchange medium, thus preventing failure. This solves the problem of poor sealing performance and easy leakage of the interlayer cavity of the ceramic tube reactor shell in the prior art. 2. The end of the clamping plate away from the interlayer cavity is fixed on the inner side of the end cap. The end cap provides thrust force to the clamping plate to prevent displacement of the clamping plate and ensure the stability of the seal. 3. The second flange is detachably fixed to the first flange. The end of the clamping plate away from the interlayer cavity is fixed to the second flange. The second flange provides thrust force to the clamping plate to prevent displacement of the clamping plate, ensure the stability of the seal, and facilitate the replacement of the clamping plate. 4. The sealing ring has a circular cross-section, and the clamping surfaces of the limiting boss and the clamping plate are designed as arc-shaped surfaces to ensure the stability of the sealing ring and reduce the possibility of deformation and displacement. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the external structure of the ceramic tubular reactor sealing assembly described in Embodiment 1. Figure 2 This is a schematic diagram of the internal structure of the ceramic tubular reactor sealing assembly described in Embodiment 1. Figure 3 for Figure 2 Enlarged schematic diagram of structure A in the middle; Figure 4 This is a schematic diagram of the internal structure of the ceramic tubular reactor sealing assembly described in Embodiment 2. Figure 5 for Figure 4 Enlarged schematic diagram of the B-structure; In the diagram: 1. Special ceramic column, 2. Outer shell, 3. Sealing plate, 4. End cap, 5. Limiting boss, 6. Pressure plate, 7. Sealing ring, 8. First flange, 9. Second flange, 10. Bolt column, 11. Pressure nut. Detailed Implementation

[0015] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0016] In the description of the utility model, it should be understood that the terms "front", "rear", "up", "down", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the utility model 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 the utility model.

[0017] Example 1 This embodiment discloses a ceramic tubular reactor sealing assembly, such as... Figure 1As shown, it mainly includes a special ceramic column 1, a shell 2, and two end caps 4. Both ends of the special ceramic column 1 are fitted with end plates 3. The special ceramic column 1 contains multiple vertically distributed reaction channels. The inner surface of the end plates has multiple connecting grooves that connect the ends of adjacent reaction channels, thus connecting the beginning and end of all reaction channels in series. Several medium channels are arranged along the height direction in the area between adjacent rows of reaction channels, and these medium channels transversely penetrate the special ceramic column 1. This allows liquid materials to enter the reaction channels of the special ceramic column, and heat exchange media to enter the medium channels of the special ceramic column. Its specific structure is prior art (refer to prior art document CN220780359U), and will not be described in detail here.

[0018] In this embodiment, as Figure 2-3 As shown, the special ceramic column 1 and the sealing plate 3 are made of silicon carbide. The inner side of the sealing plate 3 is fixedly connected to the end face of the special ceramic column 1 by sintering. Silicon carbide can withstand almost all corrosive media and is resistant to high temperature and high pressure (temperature 200℃-300℃, pressure 5-10MPa), such as highly corrosive liquids like concentrated sulfuric acid and concentrated nitric acid at 300℃. The outer shell 2 is a cylindrical structure made of 304 stainless steel. The inner wall of the outer shell 2 has annular limiting bosses 5 machined near both ends. The outer shell 2 is fitted onto the outer wall of the special ceramic column 1, forming a sandwich cavity between the outer shell 2 and the special ceramic column 1. The area between the two limiting bosses is the actual working area of ​​the sandwich cavity. Each limiting boss 5 is equipped with an annular clamping plate 6 on the side away from the interlayer cavity. The two end caps 4 are respectively assembled on the outer sides of the end caps 3 at both ends of the special ceramic column 1. The end of the clamping plate 6 away from the interlayer cavity is fixed to the inner side of the end cap 4 by conventional fixing methods such as welding or bolt connection. A sealing ring 7 is clamped between the limiting boss 5 and the clamping plate 6. The sealing ring 7 has a circular cross-section. In order to stably clamp the sealing ring 7, the clamping surface of the limiting boss 5 and the clamping plate 6 is designed as an arc surface.

[0019] First flanges 8 are machined on both outer ends of the outer shell 2. The end cap 4 is fixedly connected to the corresponding first flange 8 by multiple bolts 10. When the bolts 10 are tightened with nuts, the end cap 4 generates a thrust force on the pressure plate 6, thereby clamping the sealing ring 7 in conjunction with the limiting boss 5. A medium inlet and a medium outlet are installed on the side wall of the outer shell 2 to facilitate the circulation of heat exchange medium into and out of the jacket cavity.

[0020] When the ceramic tubular reactor is in operation, the corrosive medium passes through the special ceramic column 1, and the heat exchange medium enters the jacket cavity, where the two media exchange heat. The end cap provides thrust to the clamping plate, preventing displacement of the clamping plate. A sealing ring is clamped between the limiting boss and the clamping plate, greatly improving the stability of the seal and preventing the hydraulic pressure of the heat exchange medium from causing seal deterioration and subsequent failure. This solves the problem of poor sealing and easy leakage in the jacket cavity of the ceramic tubular reactor in the prior art.

[0021] Example 2 This embodiment discloses a ceramic tubular reactor sealing assembly, which differs from Embodiment 1 in that... Figure 4-5 As shown, the end faces of the sealing plate 3 and the special ceramic column 1 are designed separately. Under the force of the end cap, the sealing plate 3 is pressed tightly against the end face of the special ceramic column 1. To improve the sealing performance of the sealing plate, an annular sealing groove can be machined on the inner side of the sealing plate 3, and a corrosion-resistant sealing gasket is provided in the annular sealing groove. This design facilitates the disassembly of the sealing plate 3 for cleaning and avoids blockage.

[0022] The end cap 4 is fixedly connected to the corresponding first flange 8 by multiple bolts 10. A second flange 9 is also assembled between the end cap 4 and the first flange 8. The second flange 9 has a clear hole that allows the bolts to pass through. A clamping nut 11 is threaded onto the bolt 10, and the clamping nut 11 is used to press the second flange 9 onto the first flange 8. The end of the clamping plate 6 away from the interlayer cavity is fixed to the second flange 9. The second flange provides thrust to the clamping plate to prevent displacement of the clamping plate and ensure the stability of the seal. At the same time, the clamping plate can be easily replaced without replacing the end cap, making daily maintenance more convenient.

Claims

1. A ceramic tubular reactor sealing assembly, comprising a special ceramic column (1), wherein an outer shell (2) is fitted on the outer wall of the special ceramic column (1), and a sandwich cavity is formed between the outer shell (2) and the special ceramic column (1), wherein sealing plates (3) are provided at both ends of the special ceramic column (1), and end caps (4) are provided on the outer side of the sealing plates (3). characterized in that The inner wall of the outer shell (2) is provided with annular limiting protrusions (5) near both ends, and the area between the two limiting protrusions is the actual working area of ​​the interlayer cavity. Each limiting boss (5) is provided with an annular pressing plate (6) on the side away from the interlayer cavity, and a sealing ring (7) is clamped between the limiting boss (5) and the pressing plate (6). The outer sides of both ends of the outer shell (2) are provided with first flanges (8), and the end cap (4) is fixedly connected to the corresponding first flange (8).

2. The ceramic tube reactor seal assembly of claim 1, wherein, The end of the clamping plate (6) away from the interlayer cavity is fixed on the inner side of the end cap (4).

3. The ceramic tube reactor seal assembly of claim 1, wherein, A second flange (9) is provided between the end cap (4) and the first flange (8). The second flange (9) is detachably fixed to the first flange (8). The end of the clamping plate (6) away from the interlayer cavity is fixed to the second flange (9).

4. The ceramic tube reactor seal assembly of claim 1, wherein, The sealing ring (7) has a circular cross-section, and the clamping surfaces of the limiting boss (5) and the clamping plate (6) are designed as arc surfaces.

5. The ceramic tube reactor seal assembly of claim 3, wherein, The end cap (4) is fixedly connected to the corresponding first flange (8) by a plurality of bolts (10). The second flange (9) is provided with a light hole that allows the bolts to pass through. A clamping nut (11) is threaded onto the bolt (10). The clamping nut (11) is used to press the second flange (9) onto the first flange (8).

6. The ceramic tube reactor seal assembly of claim 2, wherein, The sealing plate (3) and the end face of the special ceramic column (1) are sintered together.

7. The ceramic tube reactor seal assembly of claim 3, wherein, The inner side of the sealing plate (3) is provided with an annular sealing groove, and a sealing gasket is provided in the annular sealing groove. Under the action of the sealing head (4), the sealing plate (3) is pressed against the end face of the special ceramic column (1).

8. The ceramic tube reactor seal assembly of any one of claims 1-7, wherein, The special ceramic column (1) is made of silicon carbide material.

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