Sealing structure of ceramic fiber filter tube

Abstract

The utility model relates to a sealing structure of a ceramic fiber filter tube. The sealing structure comprises a pattern plate and the ceramic fiber filter tube, a pattern plate hole is formed in the pattern plate, a first annular bulge is fixed at the top of the pattern plate along the pattern plate hole, and a labyrinth seal lower matching part is arranged at the top of the first annular bulge; a first annular groove is formed in the bottom of a flange of the ceramic fiber filter tube, and a labyrinth seal upper matching part is arranged at the inner top of the first annular groove; the first annular protrusion is sleeved with the first annular groove, and the labyrinth seal lower matching part and the labyrinth seal upper matching part jointly form a labyrinth seal structure. Supporting and limiting of the ceramic fiber filter tube by the pattern plate can be increased through the first annular protrusion, swinging of the filter tube in the operation process is reduced, the phenomenon that safe and stable operation of denitration and dust removal equipment is affected due to the fact that the neck of a filter tube flange is broken is effectively prevented, and the labyrinth seal structure is jointly formed by the labyrinth seal lower matching part and the labyrinth seal upper matching part. And meanwhile, the installation process is simple and convenient, and time and labor are saved.

Description

Technical Field

[0001] This utility model belongs to the field of flue gas purification technology, and in particular relates to a ceramic fiber filter tube sealing structure. Background Technology

[0002] In the field of flue gas purification technology in power plants, chemical plants, and metallurgical industries, integrated dust removal and denitrification technology using ceramic fiber tubes is widely used due to its superior dust removal and denitrification effects and long service life. As a key component in integrated dust removal and denitrification equipment, the performance of ceramic fiber filter tubes directly affects the purification effect of flue gas emissions and the effectiveness of environmental protection.

[0003] When installing traditional ceramic fiber filter tubes, a soft pad is first laid on the annular contact surface above the holes (mounting holes) of the tube sheet. Then, the filter tube is inserted into the holes of the tube sheet, so that the lower surface of the filter tube flange is in contact with the upper surface of the soft pad. Finally, a metal cover plate is placed on top of the filter tube flange, and multiple bolts (usually 8-12 per tube) are passed through the reserved holes in the cover plate and connected to the nuts or threaded holes below the tube sheet to lock the cover plate. The cover plate is used to compress the soft pad, thereby sealing the gap between the tube sheet and the filter tube flange.

[0004] This traditional ceramic fiber filter tube sealing structure and installation method involves many installation steps, is complex to operate, and is time-consuming and labor-intensive. Furthermore, it is prone to problems such as unevenness of the tube sheet and cover plate, or uneven thickness of the ceramic tube flange, which can lead to insufficient sealing of the cover plate and leakage of dusty flue gas during operation. At the same time, the tube sheet only supports the filter tube flange through its top surface, which makes the filter tube prone to swinging during operation. This causes fatigue stress in the neck of the filter tube flange, which can then lead to breakage and affect the safe and stable operation of the denitrification and dust removal equipment. Utility Model Content

[0005] The main objective of this invention is to propose a ceramic fiber filter tube sealing structure that can effectively solve the problems in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A ceramic fiber filter tube sealing structure includes a perforated plate and a ceramic fiber filter tube;

[0008] The flower plate has a flower plate hole, and a first annular protrusion is fixed on the top of the flower plate along the flower plate hole. The top of the first annular protrusion has a labyrinth seal lower mating part.

[0009] The bottom of the flange of the ceramic fiber filter tube is provided with a first annular groove, and the inner top of the first annular groove has a labyrinth seal upper mating part.

[0010] After the ceramic fiber filter tube is inserted into the hole of the perforated plate, the first annular groove is sleeved on the first annular protrusion, and the lower mating part of the labyrinth seal and the upper mating part of the labyrinth seal together form a labyrinth seal structure.

[0011] Preferably, the lower mating part of the labyrinth seal is a plurality of second annular protrusions, and the upper mating part of the labyrinth seal is a plurality of second annular grooves, wherein the plurality of second annular protrusions are respectively inserted into the corresponding plurality of second annular grooves to form a labyrinth seal structure.

[0012] Preferably, the cross-section of the second annular protrusion and the second annular groove is rectangular.

[0013] Preferably, a ceramic fiber pad is fixed to the surface of the first annular protrusion.

[0014] Preferably, the ceramic fiber pad is an aluminum silicate pad.

[0015] This utility model provides a ceramic fiber filter tube sealing structure, which has the following beneficial effects:

[0016] 1. After the ceramic fiber filter tube of this utility model is installed, the first annular groove is fitted on the first annular protrusion. The first annular protrusion can increase the support and limit of the ceramic fiber filter tube by the tube sheet, reduce the swing of the filter tube during operation, and effectively prevent the filter tube flange neck from breaking, which would affect the safe and stable operation of the denitrification and dust removal equipment.

[0017] 2. After the ceramic fiber filter tube of this utility model is installed, the lower mating part of the labyrinth seal and the upper mating part of the labyrinth seal together form a labyrinth seal structure. The high-efficiency sealing effect can be achieved under the weight of the ceramic fiber filter tube alone, effectively preventing the leakage of dusty fumes. At the same time, the installation process is simple and convenient, saving time and effort. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the sealing structure of the ceramic fiber filter tube of this utility model;

[0019] Figure 2 This is a schematic diagram of the labyrinth sealing structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the structure of the ceramic fiber soft pad of this utility model.

[0021] In the figure: 1. Flower plate; 11. First annular protrusion; 12. Lower mating part of labyrinth seal; 2. Ceramic fiber filter tube; 21. Flange; 22. First annular groove; 23. Upper mating part of labyrinth seal; 3. Ceramic fiber pad. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0023] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0024] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0025] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified. Furthermore, the terms "installed," "connected," and "linked" should be interpreted broadly; for example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] Example

[0027] Reference Figure 1 A ceramic fiber filter tube sealing structure includes a perforated plate 1 and a ceramic fiber filter tube 2.

[0028] The flower plate 1 has a flower plate hole, and a first annular protrusion 11 is fixed on the top of the flower plate 1 along the flower plate hole. The top of the first annular protrusion 11 has a labyrinth seal lower mating part 12.

[0029] The bottom of the flange 21 of the ceramic fiber filter tube 2 is provided with a first annular groove 22, and the inner top of the first annular groove 22 has a labyrinth seal upper mating part 23.

[0030] After the ceramic fiber filter tube 2 is inserted into the hole of the tube sheet, the first annular groove 22 is fitted onto the first annular protrusion 11, and the lower mating part 12 of the labyrinth seal and the upper mating part 23 of the labyrinth seal together form a labyrinth seal structure.

[0031] After the ceramic fiber filter tube 2 of this utility model is installed, the first annular groove 22 is fitted on the first annular protrusion 11. The first annular protrusion 11 can increase the support and limit of the ceramic fiber filter tube 2 by the tube plate 1, reduce the swing of the filter tube during operation, and effectively prevent the filter tube flange neck from breaking, which would affect the safe and stable operation of the denitrification and dust removal equipment.

[0032] Labyrinth seals, as an effective sealing method, are widely used in many industrial fields. They utilize a complex channel structure to cause fluid to change direction multiple times during passage, thereby increasing flow resistance and achieving a highly efficient seal. In this invention, after the ceramic fiber filter tube 2 is installed, the lower mating part 12 and the upper mating part 23 of the labyrinth seal together form a labyrinth seal structure. This achieves a highly efficient seal under the weight of the ceramic fiber filter tube 2 alone, effectively preventing leakage of dust-laden fumes. Furthermore, the installation process is simple and convenient, saving time and effort.

[0033] Of course, if you want to achieve the best sealing effect, you can also install a cover plate on the top of the filter tube flange 21 for tightening.

[0034] The structure of a maze seal can take many forms. In a specific implementation plan, refer to... Figure 2 A specific labyrinth seal structure is provided, wherein the lower mating part 12 of the labyrinth seal consists of a plurality of second annular protrusions, and the upper mating part 23 of the labyrinth seal consists of a plurality of second annular grooves. The plurality of second annular protrusions are respectively inserted into the corresponding plurality of second annular grooves, and the gap between the second annular protrusions and the second annular grooves forms a tortuous flow channel, thereby forming a labyrinth seal structure. In this embodiment, there are three second annular protrusions and three second annular grooves.

[0035] In one specific implementation, the cross-section of the second annular protrusion and the second annular groove is rectangular, which minimizes the gap between the second annular protrusion and the second annular groove, further ensuring the sealing effect.

[0036] In a specific implementation plan, refer to Figure 3 The surface of the first annular protrusion 11 is fixed with a ceramic fiber pad 3, and the sealing effect can be further improved by setting the ceramic fiber pad 3.

[0037] In one specific implementation, the ceramic fiber pad 3 is an aluminum silicate pad.

[0038] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A ceramic fiber filter tube sealing structure, characterized in that: Including perforated plates and ceramic fiber filter tubes; The flower plate has a flower plate hole, and a first annular protrusion is fixed on the top of the flower plate along the flower plate hole. The top of the first annular protrusion has a labyrinth seal lower mating part. The bottom of the flange of the ceramic fiber filter tube is provided with a first annular groove, and the inner top of the first annular groove has a labyrinth seal upper mating part. After the ceramic fiber filter tube is inserted into the hole of the perforated plate, the first annular groove is sleeved on the first annular protrusion, and the lower mating part of the labyrinth seal and the upper mating part of the labyrinth seal together form a labyrinth seal structure.

2. The ceramic fiber filter tube sealing structure according to claim 1, characterized in that: The lower mating part of the labyrinth seal consists of several second annular protrusions, and the upper mating part of the labyrinth seal consists of several second annular grooves. The several second annular protrusions are respectively inserted into the corresponding several second annular grooves to form a labyrinth seal structure.

3. The ceramic fiber filter tube sealing structure according to claim 2, characterized in that: The cross-section of the second annular protrusion and the second annular groove is rectangular.

4. The ceramic fiber filter tube sealing structure according to claim 1, characterized in that: A ceramic fiber pad is fixed to the surface of the first annular protrusion.

5. The ceramic fiber filter tube sealing structure according to claim 4, characterized in that: The ceramic fiber cushion is an aluminum silicate cushion.

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