High-sealing preheater ceramic inner cylinder

Abstract

The utility model relates to the technical field of preheater inner cylinders, and discloses a high-sealing preheater ceramic inner cylinder which comprises a cylinder body, connecting holes are formed in the surfaces of the two ends of the cylinder body, the upper end of the cylinder body is connected with an upper connecting flange through the connecting holes and bolts, and the lower end of the cylinder body is connected with a lower connecting flange through the connecting holes and bolts. Sealing rings are annularly arranged at the joints of the upper connecting flange and the lower connecting flange with the cylinder body; the backing ring is fixed to the inner surface of the lower end of the cylinder body, a sliding groove is formed in the inner surface of the upper end of the cylinder body, and an embedding groove is formed in the connecting position of the sliding groove and the upper surface of the cylinder body. According to the high-sealing preheater ceramic inner barrel, the clamping ring is arranged and used for being matched with the backing ring to clamp and fix the silicon carbide inner container, the detachable clamping ring can be detached after the silicon carbide inner container is seriously abraded, the silicon carbide inner container can be conveniently and independently replaced, the whole inner barrel does not need to be replaced, and the maintenance cost of the inner barrel is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of the inner cylinder of a preheater, in particular to a highly sealed ceramic inner cylinder of a preheater. Background Technique

[0002] The inner cylinder of the preheater is an important part of the preheater, and it is mainly made of cast heat-resistant steel. Due to the high-speed scouring of high-temperature alkali vapor, sulfur vapor and powder in the preheater, the hanging pieces installed on the inner cylinder of the preheater are quickly corroded and worn. The failure of the inner cylinder will reduce the decomposition and separation rate and increase the heat loss of the preheater.

[0003] After searching, there is a kind of all-ceramic inner cylinder of a preheater with a publication number of CN211694977U, including a cylinder body. The cylinder body is mainly composed of a first plate and a second plate. Clamping blocks are fixedly connected to the left and right sides of the first plate and the second plate, which is used to solve the problem that when the sealing performance of the ceramic inner cylinder is not very good, it is easy to cause further cracking of the inner cylinder; after the practical cylinder body is damaged, the entire inner cylinder needs to be replaced. The inner wall of the inner cylinder is directly in contact with corrosive hot gas, and the service life is short, resulting in a high later maintenance and replacement cost of the inner cylinder. Summary of the Invention

[0004] The purpose of the utility model is to provide a highly sealed ceramic inner cylinder of a preheater to solve the problems put forward in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical scheme: a highly sealed ceramic inner cylinder of a preheater, including:

[0006] A cylinder body, connection holes are opened on the surfaces at both ends of the cylinder body. The upper end of the cylinder body is connected with an upper connection flange through the connection holes and bolts. The lower end of the cylinder body is connected with a lower connection flange through the connection holes and bolts. Sealing rings are arranged in a ring shape at the connection parts of the upper connection flange and the lower connection flange and the cylinder body;

[0007] A gasket ring, which is fixed on the inner surface at the lower end of the cylinder body. A sliding groove is opened on the inner surface at the upper end of the cylinder body. An embedding groove is opened at the connection part of the sliding groove and the upper surface of the cylinder body. A silicon carbide inner liner is arranged on the inner side surface of the cylinder body through the gasket ring. A clamping ring is arranged on the upper surface of the silicon carbide inner liner, and the clamping ring is connected to the inside of the sliding groove. A clamping block is fixed at the connection part of the clamping ring and the sliding groove. Adjusting grooves are opened on the upper surfaces of both ends of the clamping ring close to the clamping block.

[0008] Preferably, the cylinder body forms an annular structure with the upper connection flange and the upper connection flange through the sealing ring, and the upper connection flange and the lower connection flange are symmetrically arranged about the central axis position of the cylinder body.

[0009] Preferably, the outer shape structures of the clamping blocks and the clamping grooves match each other, and the clamping ring is rotationally connected to the cylinder body through the clamping blocks and the sliding grooves, and the silicon carbide inner liner is snap-connected to the cylinder body through the cushion ring and the clamping ring.

[0010] Preferably, heat dissipation holes are formed in the outer wall of the cylinder body, a cavity is formed in the cylinder body, and supports are fixed on the inner surfaces of both sides of the cavity.

[0011] Preferably, the cavity and the heat dissipation holes are in communication connection, and the supports are evenly distributed at equal intervals along the inside of the cavity.

[0012] Preferably, hanging pieces are installed on the inner walls of the upper connecting flange and the lower connecting flange through bolts.

[0013] Preferably, the hanging pieces are detachably connected to the upper connecting flange and the lower connecting flange, and the hanging pieces are evenly distributed at equal intervals along the inner side surfaces of the upper connecting flange and the lower connecting flange.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0015] The highly sealed preheater ceramic inner cylinder is provided with a clamping ring, which is used to cooperate with the cushion ring to clamp and fix the silicon carbide inner liner, and the detachable clamping ring can be removed after the silicon carbide inner liner is severely worn, facilitating the separate replacement of the silicon carbide inner liner without replacing the entire inner cylinder, reducing the maintenance cost of the inner cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of the combined state of the present utility model;

[0017] Figure 2 is a schematic sectional structural diagram of the cylinder body part of the present utility model;

[0018] Figure 3 is a schematic front view structural diagram of the clamping ring part of the present utility model;

[0019] Figure 4 is a schematic structural diagram of the disassembled state of the cylinder body and the connecting flange of the present utility model.

[0020] In the figure: 1, cylinder body; 2, connection hole; 3, upper connecting flange; 4, lower connecting flange; 5, sealing ring; 6, cushion ring; 7, silicon carbide inner liner; 8, sliding groove; 9, clamping groove; 10, clamping ring; 11, clamping block; 12, adjustment groove; 13, heat dissipation hole; 14, cavity; 15, support; 16, hanging piece. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0022] The present invention provides a highly sealed preheater ceramic inner cylinder through improvement. Please refer to Figure 1 and Figure 4 , including: a cylinder body 1, connection holes 2 are opened on the two end surfaces of the cylinder body 1, and the material of the cylinder body 1 is ceramic material, with excellent corrosion resistance and heat resistance; the upper end of the cylinder body 1 is connected to an upper connection flange 3 through the connection hole 2 and bolts, and the lower end of the cylinder body 1 is connected to a lower connection flange 4 through the connection hole 2 and bolts. Sealing rings 5 are provided in a ring shape at the connection parts of the upper connection flange 3 and the lower connection flange 4 with the cylinder body 1. The cylinder body 1 forms an annular structure with the upper connection flange 3 and the upper connection flange 3 through the sealing ring 5. Moreover, the upper connection flange 3 and the lower connection flange 4 are symmetrically arranged about the central axis position of the cylinder body 1. The upper connection flange 3 and the lower connection flange 4 are connected to the cylinder body 1 through the sealing ring 5. On the basis of not affecting the sealing performance of the cylinder body 1, it is convenient to connect and fix the cylinder body 1 with the installation structure, and it is easy to disassemble, clean and maintain; hanging pieces 16 are installed on the inner walls of the upper connection flange 3 and the lower connection flange 4 through bolts. A detachable structure is formed between the hanging pieces 16 and the upper connection flange 3 and the lower connection flange 4, and the hanging pieces 16 are evenly distributed at equal intervals along the inner side surfaces of the upper connection flange 3 and the lower connection flange 4. The provided hanging pieces 16 are installed on the inner side of the inner cylinder by means of fasteners, which is more stable than the ordinary hanging type hanging pieces 16 after installation. Moreover, both ends of the hanging pieces 16 are installed on the upper connection flange 3 and the lower connection flange 4 through fasteners, and the wear of the middle part of the hanging pieces 16 on the inner surface of the cylinder body 1 is small, which is convenient to extend the service life of the hanging pieces 16.

[0023] Please refer to Figures 2 - 3, A highly sealed preheater ceramic inner cylinder, comprising: a gasket ring 6 fixed to the inner surface of the lower end of the cylinder body 1. A chute 8 is provided on the inner surface of the upper end of the cylinder body 1. A groove 9 is provided at the connection of the chute 8 and the upper surface of the cylinder body 1. A silicon carbide inner liner 7 is arranged on the inner surface of the cylinder body 1 through the gasket ring 6. A snap ring 10 is arranged on the upper surface of the upper end of the silicon carbide inner liner 7, and the snap ring 10 is connected to the inside of the chute 8. And the silicon carbide inner liner 7 is in snap connection with the cylinder body 1 through the gasket ring 6 and the snap ring 10. A snap block 11 is fixed at the connection of the snap ring 10 and the chute 8. The outer shape structure of the snap block 11 is in line with that of the groove 9, and the snap ring 10 is in rotational connection with the cylinder body 1 through the snap block 11 and the chute 8. The provided snap ring 10 is used to cooperate with the gasket ring 6 to snap-fix the silicon carbide inner liner 7, so that the silicon carbide inner liner 7 can be stably arranged on the inner surface of the cylinder body 1. By separately providing the silicon carbide inner liner 7, the wear of the inner surface of the cylinder body 1 is delayed. And the detachable snap ring 10 can be removed after the silicon carbide inner liner 7 is severely worn, which is convenient for separately replacing the silicon carbide inner liner 7 without replacing the entire inner cylinder, reducing the maintenance cost of the inner cylinder; Adjustment grooves 12 are provided on the upper surfaces of both ends of the snap ring 10 close to the snap block 11. The adjustment grooves 12 facilitate the staff to rotate or hook the snap ring 10, and facilitate marking the position where the snap block 11 is located.

[0024] Please refer to Figure 2 and Figure 4 , A highly sealed preheater ceramic inner cylinder, comprising: heat dissipation holes 13 are provided on the outer wall of the cylinder body 1. A cavity 14 is provided inside the cylinder body 1. A communication connection is formed between the cavity 14 and the heat dissipation holes 13. Support columns 15 are fixed on the inner surfaces of both sides of the cavity 14, and the support columns 15 are evenly distributed at equal intervals along the inside of the cavity 14. The provided cavity 14 and the heat dissipation holes 13 are used to increase the heat exchange rate between the outer wall of the cylinder body 1 and the external environment, increase the temperature difference between the inner surface and the outer surface of the cylinder body 1, thereby increasing the air pressure difference inside and outside the cylinder body 1, so that the flow rate of hot air inside the cylinder body 1 increases, and heat can be quickly transferred, reducing heat loss.

[0025] Working principle: For this type of highly sealed preheater ceramic inner cylinder, first, the staff uses fasteners to install the upper connecting flange 3 and the lower connecting flange 4 at the upper and lower ends of the cylinder body 1 through the connecting holes 2 opened on the cylinder body 1. And at the connection between the upper connecting flange 3 and the lower connecting flange 4 and the cylinder body 1, a sealing ring 5 is provided in a ring shape, so that the airtightness at the connection between the upper and lower ends of the cylinder body 1 and the upper and lower connecting flanges 3 and 4 is kept good, and no corrosive hot air leakage will occur. Moreover, the installed upper connecting flange 3 and lower connecting flange 4 facilitate the staff to fix the cylinder body 1 to the installation structure, reduce the installation difficulty, and improve the construction efficiency. Subsequently, a silicon carbide inner liner 7 is arranged on the inner wall of the cylinder body 1 through a spacer ring 6. The silicon carbide inner liner 7 has good corrosion resistance and high temperature resistance and is used to protect the inner wall of the cylinder body 1. And when the silicon carbide inner liner 7 is arranged, a snap ring 10 is arranged at its upper end. The clamping blocks 11 fixed on the outer walls at both ends of the snap ring 10 slide into the sliding grooves 8 through the embedded grooves 9. By the staff pulling the adjustment groove 12, the snap ring 10 can be rotated or lifted. And the position of the adjustment groove 12 is close to that of the clamping block 11, which is convenient for the staff to identify the position where the clamping block 11 is located. Through the easily detachable snap ring 10, the silicon carbide inner liner 7 can be quickly disassembled and assembled. When the silicon carbide inner liner 7 is severely worn, the silicon carbide inner liner 7 can be replaced separately without replacing the entire inner cylinder, reducing the use and maintenance costs. Finally, the cylinder body 1 increases the temperature difference between the inner and outer walls of the cylinder body 1 through the cavity 14 and the heat dissipation holes 13, increases the internal and external air pressure difference through the temperature difference, speeds up the flow rate of the hot air, and improves the preheating efficiency. The support columns 15 in the cavity 14 are used to enhance the structural stability of the cylinder body 1. And ceramic hanging pieces 16 are installed on the inner walls of the upper connecting flange 3 and the lower connecting flange 4 at both ends of the cylinder body 1 through fasteners, which are used to resist the erosion of the corrosive hot air on the inner side of the inner cylinder. And the hanging pieces 16 fixed by fasteners have better stability than the hanging pieces 16 fixed by hanging, are not easy to fall off, and improve the heat exchange efficiency of the preheater.

[0026] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A highly sealed preheater ceramic inner cylinder, characterized in that, Comprising: A cylinder body (1), connection holes (2) are provided on both end surfaces of the cylinder body (1). The upper end of the cylinder body (1) is connected with an upper connection flange (3) through the connection holes (2) and bolts. The lower end of the cylinder body (1) is connected with a lower connection flange (4) through the connection holes (2) and bolts. A sealing ring (5) is annularly arranged at the connection between the upper connection flange (3) and the lower connection flange (4) and the cylinder body (1). A gasket ring (6) is fixed on the inner surface of the lower end of the cylinder body (1). A sliding groove (8) is provided on the inner surface of the upper end of the cylinder body (1). An embedding groove (9) is provided at the connection between the sliding groove (8) and the upper surface of the cylinder body (1). A silicon carbide inner liner (7) is arranged on the inner side surface of the cylinder body (1) through the gasket ring (6). A snap ring (10) is arranged on the upper surface of the silicon carbide inner liner (7), and the snap ring (10) is connected inside the sliding groove (8). A clamping block (11) is fixed at the connection between the snap ring (10) and the sliding groove (8). Adjusting grooves (12) are provided on the upper surfaces of both ends of the snap ring (10) close to the clamping block (11).

2. The high-sealing preheater ceramic inner cylinder according to claim 1, characterized in that: An annular structure is formed between the cylinder body (1) and the upper connection flange (3) through the sealing ring (5), and the upper connection flange (3) and the lower connection flange (4) are symmetrically arranged about the central axis position of the cylinder body (1).

3. A highly sealed preheater ceramic inner cylinder according to claim 1, characterized in that: The shape structure of the clamping block (11) is in line with that of the embedding groove (9), and the snap ring (10) is rotationally connected with the cylinder body (1) through the clamping block (11) and the sliding groove (8). Moreover, the silicon carbide inner liner (7) is snap-fitted with the cylinder body (1) through the gasket ring (6) and the snap ring (10).

4. A highly sealed preheater ceramic inner cylinder according to claim 1, characterized in that: Heat dissipation holes (13) are provided on the outer wall of the cylinder body (1), a cavity (14) is provided inside the cylinder body (1), and support columns (15) are fixed on the inner surfaces of both sides of the cavity (14).

5. A highly sealed preheater ceramic inner cylinder according to claim 4, characterized in that: A communicating connection is formed between the cavity (14) and the heat dissipation holes (13), and the support columns (15) are evenly distributed at equal intervals along the inside of the cavity (14).

6. A highly sealed preheater ceramic inner cylinder according to claim 1, characterized in that: Hanging pieces (16) are installed on the inner walls of the upper connection flange (3) and the lower connection flange (4) through bolts.

7. A highly sealed preheater ceramic inner cylinder according to claim 6, characterized in that: A detachable structure is formed between the hanging pieces (16) and the upper connection flange (3) and the lower connection flange (4), and the hanging pieces (16) are evenly distributed at equal intervals along the inner side surfaces of the upper connection flange (3) and the lower connection flange (4).

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