Sealing structure of ceramic fiber filter tube

Abstract

The invention 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. By means of the first annular protrusion, supporting and limiting of the pattern plate on the ceramic fiber filter pipe can be increased, swing of the filter pipe in the operation process is reduced, the situation that the flange neck of the filter pipe is broken, and consequently safe and stable operation of denitration and dust removal equipment is affected is effectively prevented, and the labyrinth seal lower matching part and the labyrinth seal upper matching part jointly form the labyrinth seal structure; and meanwhile, the installation process is simple and convenient, and time and labor are saved.

Description

Technical Field

[0001] The present invention belongs to the technical field of flue gas purification, and particularly relates to a sealing structure for a ceramic fiber filter tube. Background Art

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

[0003] When installing traditional ceramic fiber filter tubes, it is necessary to first lay a soft pad on the annular contact surface above the hole in the flower plate (installation hole), then insert the filter tube into the hole in the flower plate so that the lower surface of the filter tube flange fits the upper surface of the soft pad, and finally place a metal cover plate above the filter tube flange. Pass multiple bolts (usually 8 - 12 per tube) through the reserved holes in the cover plate and connect them to the nuts or threaded holes below the flower plate to lock the cover plate, and compact it through the cover plate, so that the soft pad is compressed to seal the gap between the flower plate and the filter tube flange.

[0004] This traditional ceramic fiber filter tube sealing structure and installation method have many installation procedures, complex operations, time-consuming and laborious, and are also prone to the situation that the cover plate cannot be compacted due to the unevenness of the flower plate and the cover plate, or the uneven thickness of the ceramic tube flange, resulting in poor sealing, which leads to the leakage of dust-containing flue gas during the operation stage. At the same time, the flower plate only supports the filter tube flange through the top surface, and the filter tube is prone to swing during operation, causing fatigue stress in the neck of the filter tube flange and then fracture, affecting the safe and stable operation of the denitrification and dust removal equipment. Summary of the Invention

[0005] The main object of the present invention is to propose a sealing structure for a ceramic fiber filter tube, which can effectively solve the problems in the background art.

[0006] To achieve the above object, the present invention is realized through the following technical solutions:

[0007] A sealing structure for a ceramic fiber filter tube, comprising a flower plate and a ceramic fiber filter tube;

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

[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 an upper mating part of the labyrinth seal;

[0010] After the ceramic fiber filter tube is inserted into the hole of the flower 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 jointly 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. 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-sections of the second annular protrusions and the second annular grooves are rectangular.

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

[0014] Preferably, the ceramic fiber soft pad is a silicon aluminum soft pad.

[0015] The present invention provides a ceramic fiber filter tube sealing structure, which has the following beneficial effects:

[0016] 1. After the ceramic fiber filter tube of the present invention is installed, the first annular groove is sleeved on the first annular protrusion. The first annular protrusion can increase the support and limit of the flower plate on the ceramic fiber filter tube, reduce the swing of the filter tube during operation, and effectively prevent the fracture of the flange neck of the filter tube, thus affecting the safe and stable operation of the denitration and dust removal equipment.

[0017] 2. After the ceramic fiber filter tube of the present invention is installed, the lower mating part of the labyrinth seal and the upper mating part of the labyrinth seal jointly form a labyrinth seal structure, which can achieve the effect of high-efficiency sealing only under the self-weight of the ceramic fiber filter tube, effectively prevent the leakage of flue gas with dust, and at the same time, the installation process is simple and convenient, saving time and effort. Description of the Drawings

[0018] Figure 1 It is a schematic diagram of the ceramic fiber filter tube sealing structure of the present invention;

[0019] Figure 2 It is a schematic diagram of the labyrinth seal structure of the present invention;

[0020] Figure 3 It is a schematic diagram of the structure of the ceramic fiber soft pad of the present invention.

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

[0022] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions in the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the present invention.

[0023] The technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. 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 scope of protection of the present invention.

[0024] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention.

[0025] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless otherwise specifically defined. In addition, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] Embodiment

[0027] Referring to Figure 1 , a sealing structure for a ceramic fiber filter tube, comprising a perforated plate 1 and a ceramic fiber filter tube 2;

[0028] The perforated plate 1 has perforated plate holes, and a first annular protrusion 11 is fixed along the perforated plate holes at the top of the perforated plate 1, and a lower mating part 12 of the labyrinth seal is provided at the top of the first annular protrusion 11;

[0029] At the bottom of the flange 21 of the ceramic fiber filter tube 2, a first annular groove 22 is opened, and an upper mating part 23 of the labyrinth seal is provided at the inner top of the first annular groove 22;

[0030] After the ceramic fiber filter tube 2 is inserted into the hole of the perforated plate, the first annular groove 22 is sleeved on 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 jointly form a labyrinth seal structure.

[0031] After the installation of the ceramic fiber filter tube 2 of the present invention, the first annular groove 22 is sleeved on the first annular protrusion 11. The first annular protrusion 11 can increase the support and limit of the perforated plate 1 on the ceramic fiber filter tube 2, reduce the swing of the filter tube during operation, and effectively prevent the fracture of the neck of the filter tube flange, thus affecting the safe and stable operation of the denitration and dust removal equipment.

[0032] As an effective sealing method, the labyrinth seal structure is widely used in many industrial fields. It uses a complex channel structure to make the fluid change direction multiple times when passing through, thereby increasing the flow resistance and achieving an efficient sealing effect. After the installation of the ceramic fiber filter tube 2 of the present invention, the lower mating part 12 of the labyrinth seal and the upper mating part 23 of the labyrinth seal jointly form a labyrinth seal structure, which can achieve an efficient sealing effect only under the self-weight of the ceramic fiber filter tube 2, effectively prevent the leakage of the dust-laden flue gas, and at the same time, the installation process is simple and convenient, saving time and effort.

[0033] Of course, if the pursuit is an extreme sealing effect, a cover plate can also be provided on the top of the filter tube flange 21 for pressing.

[0034] The structural forms of the labyrinth seal are diverse. In a specific implementation, referring to Figure 2 , a specific labyrinth seal structure is provided. The lower mating part 12 of the labyrinth seal is a plurality of second annular protrusions, and the upper mating part 23 of the labyrinth seal is 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 protrusion and the second annular groove forms a tortuous flow channel, thus forming a labyrinth seal structure. In this embodiment, there are three second annular protrusions and three second annular grooves respectively.

[0035] In a specific implementation, the cross-sections of the second annular protrusion and the second annular groove are rectangular, which can minimize the gap between the second annular protrusion and the second annular groove and further ensure the sealing effect.

[0036] In a specific implementation, referring to Figure 3 , a ceramic fiber soft pad 3 is fixed on the surface of the first annular protrusion 11. By setting the ceramic fiber soft pad 3, the sealing effect can be further improved.

[0037] In a specific implementation, the ceramic fiber soft pad 3 is a silicon aluminum soft pad.

[0038] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

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

2. A ceramic fiber filter tube sealing structure according to claim 1, characterized in that: 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. The plurality of second annular protrusions are respectively inserted into the corresponding plurality of second annular grooves to form a labyrinth seal structure.

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

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

5. A 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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