High-temperature filter element sealing structure

Abstract

The utility model discloses a high-temperature filter element sealing structure which comprises a filter element, a tube plate and a pressing ring, the lower end of the filter element is a filter element cylinder section, the upper end of the filter element is of a special-shaped structure, the pressing ring is arranged over the filter element, and the tube plate is arranged on the outer side of the special-shaped structure and the outer side of the lower end of the pressing ring in a sleeved mode. A first gasket is arranged between the outer side of the special-shaped structure and the inner side wall of the tube plate, and a second gasket is arranged between the pressing ring and the filter element. According to the high-temperature filter element sealing structure, a second sealing structure for connecting the filter element and the pressing ring is optimized and improved, the second gasket is fixed between the filter element and the pressing ring at the same time, the second sealing structure is formed among the filter element, the pressing ring and the tube plate, and inclination and misalignment of the filter element, the pressing plate and the second gasket in the installation process are avoided; transverse displacement caused by high-frequency vibration is avoided, sealing is more reliable, the structural design is compact, the structure is simple, manufacturing is convenient, leakage risk points of the filter element are reduced, and long-period, continuous and stable operation of the filter element is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of coal gasification, coal-to-synthetic natural gas, biomass gasification, high-temperature gas dust removal, in particular to a high-temperature filter core sealing structure. BACKGROUND

[0002] The gas dust removal device is one of the core equipment in the industries of coal gasification, coal-to-synthetic natural gas, biomass gasification, etc. The high-temperature filter core used is for filtering and separating dust and gas in the dust-containing and corrosive crude synthetic gas under high-temperature working conditions (≥ 250℃) to purify the synthetic gas. The gas dust removal device keeps the filter core in a low-pressure differential long-period operation by high-frequency reverse airflow blowing to make the dust on the outer surface of the filter core fall off.

[0003] The high-temperature filter core is usually made of ceramic / metal filter elements and fixed on the tube plate or flower plate of the dust removal device by a sealing gasket. The filter core sealing structure usually adopts a filter core + gasket + pressing plate compression structure. This structure causes the filter core to vibrate during long-term high-frequency reverse airflow blowing, and then repeatedly compresses the gasket, reducing the gasket's resilience effect. When the pressure difference is ≥ 25 kPa, dust is likely to leak from the sealing part, leading to the failure of the filter core sealing.

[0004] In order to enhance the sealing effect, a filter device disclosed in Chinese Patent Publication No. CN106474843A adopts a sealing method that retains the original sealing element between the filter core and the tube plate, processes the outer side of the special-shaped end face of the filter core into a recess, and inclines the inner circumferential surface. A second sealing element, graphite sealing ring, is arranged on the recess, so that the inner side of the graphite sealing ring presses against the inner circumferential surface of the special-shaped end face of the filter core. Chinese Patent Publication No. CN216320717U discloses a high-temperature dust remover filter core sealing structure, which adopts a sealing method that retains the original second sealing element and processes the lower end face of the original pressing seat into an inclined surface. A first sealing element is arranged between the inclined surface and one end of the filter core, realizing double sealing by the first and second sealing elements, which can effectively prevent the single sealing gasket from failing. Although the above two methods both add a second sealing element, they only process the outer side of the special-shaped end face of the filter core or the lower end face of the pressing seat into an inclined surface, while the end face of the pressing seat or the filter core on the other side of the sealing gasket is a flat surface. During installation, the inclined surface is prone to misalignment. In the working condition of high-frequency blowing of the filter core, the high-frequency vibration of the filter core is likely to cause the flat surface of the sealing element to deviate horizontally, changing the sealing position of the filter core. When the deviation is too large, it will lead to sealing failure.

[0005] Therefore, under the working condition of high-frequency blowing of the filter core, an efficient and reliable filter core sealing form is needed, which is easy to install and does not leak during use, thereby prolonging the service life of the filter core. SUMMARY

[0006] In order to overcome the problems existing in the prior art, the utility model discloses a high temperature filter core sealing structure, solves the problem of long -term, continuous, stable operation of high temperature sealing structure under the working condition of high -frequency blowback filter core.

[0007] The technical solutions provided by the utility model are as follows:

[0008] A high temperature filter core sealing structure, including filter core, pipe plate and pressure ring, the lower end of filter core is the filter core cylinder section of cylindrical structure, the upper end of filter core is special-shaped structure, the pressure ring is set in the direct upper of filter core, the pipe plate is set in the special-shaped structure with the lower end outside of pressure ring, and the pipe plate with special-shaped structure cooperation;

[0009] The outside of special-shaped structure with the inside wall of pipe plate is provided with first gasket, and the second gasket is arranged between the pressure ring and the filter core, and the outer end surface of the second gasket is in abutment with the pipe plate, the filter core, the pressure ring and the pipe plate are sealed through the second gasket.

[0010] Further, the pipe plate is provided with a through hole of special-shaped structure, the through hole is respectively through hole large diameter and through hole small diameter from top to bottom, and the through hole large diameter and the through hole small diameter are connected through the through hole inclined surface;

[0011] The outer end surface size of special-shaped structure is greater than the size of filter core cylinder section, the outer end surface size of special-shaped structure is less than the size of the through hole large diameter of pipe plate, and the outer end surface size of special-shaped structure is greater than the size of the through hole small diameter of the lower end of pipe plate, so that the filter core can pass through the through hole of pipe plate from top and can be hung in the through hole of pipe plate.

[0012] Further, the special-shaped structure is provided with a first inclined surface corresponding to the position of the through hole inclined surface, and the first gasket is located between the first inclined surface and the through hole inclined surface.

[0013] The upper surface of the special-shaped structure is a first convex structure, the first convex structure includes a first sealing plane, a filter core upper end surface and a first sealing side surface, and the lower part of the second gasket is sleeved on the first convex structure.

[0014] Further, the upper end of the pressure ring is a pressure ring cylinder section, the lower end of the pressure ring is a flange structure, the flange structure includes an upper end surface, a second sealing plane, a lower end surface, a second sealing side surface and a pressure ring outer diameter, the size of the pressure ring outer diameter is less than the size of the through hole large diameter, and greater than the size of the through hole small diameter.

[0015] The second sealing plane, the lower end surface and the second sealing side surface constitute a downward second convex structure which is arranged opposite to the first convex structure and has a consistent opposite surface size, and the second gasket is sleeved on the second convex structure and the first convex structure.

[0016] Further, a threaded hole is formed in the upper surface of the tube plate, a bolt is mounted in the threaded hole, a pressing plate is fixed on the bolt, the pressing ring cylinder segment penetrates through the pressing plate, and the pressing plate is fastened by a nut matched with the bolt.

[0017] A spring is sleeved on the pressing ring cylinder segment between the pressing plate and the upper end surface of the flange structure.

[0018] Further, the filter core cylinder segment, the pressing ring cylinder segment and the second gasket are coaxially arranged.

[0019] Compared with the prior art, the high-temperature filter core sealing structure has the following beneficial effects:

[0020] The high-temperature filter core sealing structure optimizes and improves the second sealing structure of the connection between the filter core and the pressing ring, fixes the second gasket between the filter core and the pressing ring at the same time, forms the second sealing structure between the filter core, the pressing ring and the tube plate, avoids the inclination and misalignment of the filter core, the pressing plate and the second gasket during the installation process, avoids the transverse displacement caused by high-frequency vibration, and makes the sealing more reliable. The compact design, simple structure and convenient manufacturing reduce the risk points of filter core leakage and ensure the long-period, continuous and stable operation of the filter core. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 FIG. 1 is a cross-sectional structure schematic view of the high-temperature filter core sealing structure in the embodiment of the utility model;

[0022] Figure 2 FIG. 2 is a cross-sectional structure schematic view of the filter core in the embodiment of the utility model;

[0023] Figure 3 FIG. 3 is a cross-sectional structure schematic view of the pressing plate in the embodiment of the utility model.

[0024] The signs are as follows:

[0025] 1-filter core; 2-first gasket; 3-tube plate; 4-second gasket; 5-spring; 6-pressing plate; 7-pressing ring; 8-bolt; 9-nut; 11-filter core cylinder segment; 12-first inclined surface; 13-outer end surface; 14-first sealing plane; 15-filter core upper end surface; 16-first sealing side surface; 31-through hole large diameter; 32-through hole inclined surface; 33-through hole small diameter; 71-pressing ring cylinder segment; 72-upper end surface; 73-second sealing plane; 74-lower end surface; 75-second sealing side surface; 76-pressing ring outer diameter. DETAILED DESCRIPTION

[0026] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the embodiments described below are only a part of the embodiments of the present application, rather than all the embodiments of the present application. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0027] Therefore, the detailed description of the embodiments of the present application provided below in conjunction with the drawings is intended to represent only selected embodiments of the present application and not limit the scope of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts fall within the scope of the present application.

[0028] It should be understood that, in the description of the embodiments of the present application, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the embodiments of the present application. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features limited by "first", "second" can explicitly or implicitly include one or more of the features. In the description of the embodiments of the present application, the meaning of "multiple" is two or more, unless otherwise explicitly specified and limited.

[0029] In the description of the embodiments of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "set", "mount", "connected", "connected" should be understood broadly, for example, can be fixedly connected, or can be detachably connected, or integrally connected; can be mechanically connected, or electrically connected or can communicate with each other; can be directly connected, or indirectly connected through an intermediate medium, or the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0030] As Figure 1As shown in the utility model provides a high temperature filter core sealing structure, including filter core 1, tube sheet 3 and compression ring 7, the lower end of filter core 1 is the filter core cylinder section 11 of cylindrical structure, the upper end of filter core 1 is special-shaped structure, compression ring 7 is set at the top of filter core 1, and tube sheet 3 is sleeved on the outside of the lower end of special-shaped structure and compression ring 7, and tube sheet 3 cooperates with special-shaped structure, and the cooperation between tube sheet 3 and special-shaped structure specifically refers to that the shape of the inner wall of tube sheet 3 is similar to the contour shape of special-shaped structure, and tube sheet 3 is sleeved on the outside of special-shaped structure, and tube sheet 3 is also sleeved on the outside of the lower end of compression ring 7.

[0031] The first gasket 2 is arranged between the outer side of the special-shaped structure and the inner side wall of the tube sheet 3, the second gasket 4 is arranged between the compression ring 7 and the filter core 1, and the outer end surface of the second gasket 4 abuts against the tube sheet 3, and the filter core 1, the compression ring 7 and the tube sheet 3 are sealed through the second gasket.

[0032] In the high temperature filter core sealing structure provided by the utility model, the first gasket 2 is located between the filter core 1 and the tube sheet 3, and serves as the first sealing structure of the filter core sealing structure. The compression ring 7 is located above the filter core 1, and the second gasket 4 is located between the compression ring 7 and the filter core 1, and forms the second sealing structure with the filter core 1, the compression ring 7 and the tube sheet 3.

[0033] Optionally, the tube sheet 3 is provided with a through hole of special-shaped structure, the through hole comprises a through hole large diameter 31 and a through hole small diameter 33 from top to bottom, the size of the through hole large diameter 31 is greater than the size of the through hole small diameter 33, and the through hole large diameter 31 and the through hole small diameter 33 are connected through a through hole inclined surface 32.

[0034] The size of the outer end surface 13 of the special-shaped structure of the filter core 1 is greater than the size of the filter core cylinder section 11, the size of the outer end surface 13 of the special-shaped structure is less than the size of the through hole large diameter 31 of the tube sheet 3, and the size of the outer end surface 13 of the special-shaped structure is greater than the size of the through hole small diameter 33 of the lower end of the tube sheet 3, so that the filter core 1 can pass through the through hole of the tube sheet 3 from top to bottom and can be hung in the through hole of the tube sheet 3.

[0035] Optionally, the filter core 1 is provided with a first inclined surface 12 corresponding to the position of the through hole inclined surface 32, and the first gasket 2 is located between the first inclined surface 12 and the through hole inclined surface 32.

[0036] As shown in the utility model, Figure 2 The upper surface of the special-shaped structure of the filter core 1 is a first convex structure, the first convex structure comprises a first sealing plane 14, a filter core upper end surface 15 and a first sealing side surface 16, and the lower part of the second gasket 4 is sleeved on the first convex structure.

[0037] Specifically, the top end of the filter element 1 is a first convex structure in the shape of a ring-shaped step formed by a first sealing plane 14, an upper end surface 15 of the filter element, and a first sealing side surface 16. The upper end surface 15 of the filter element is the top plane of the first convex structure, the first sealing plane 14 is the bottom plane of the first convex structure, and the first sealing side surface 16 connects the first sealing plane 14 and the upper end surface 15 of the filter element. The second gasket 4 is sleeved on the first sealing side surface 16, the bottom surface of the second gasket 4 abuts against the first sealing plane 14, and the size of the second gasket 4 is adapted to the size of the first sealing side surface 16.

[0038] As shown in Figure 3 , the upper end of the compression ring 7 is a compression ring cylindrical segment 71, and the lower end of the compression ring 7 is a flange structure including an upper end surface 72, a second sealing plane 73, a lower end surface 74, a second sealing side surface 75, and a compression ring outer diameter 76. The size of the compression ring outer diameter 76 is smaller than the size of the large diameter 31 of the through hole and larger than the size of the small diameter 33 of the through hole, so that the tube plate 3 can be sleeved on the compression ring 7.

[0039] The second sealing plane 73, the lower end surface 74, and the second sealing side surface 75 form a downward second convex structure, which is arranged opposite to the first convex structure and has the same size as the opposite surface of the first convex structure. The second gasket 4 is sleeved on the second convex structure and the first convex structure.

[0040] As shown in Figure 1 , the first convex structure and the second convex structure are mirror image arranged. In order to better sleeve the second gasket 4 on the second convex structure and the first convex structure, the opposite surfaces of the first convex structure and the second convex structure are aligned and have the same shape and area, that is, the first convex structure and the second convex structure can be perfectly combined after being extended.

[0041] Optionally, a threaded hole is formed in the upper surface of the tube plate 3, a bolt 8 is installed in the threaded hole, a compression plate 6 is fixed on the bolt 8, the compression ring cylindrical segment 71 penetrates through the compression plate 6, and the compression plate 6 is fastened by a nut 9 matched with the bolt 8. The spring 5 is sleeved on the compression ring cylindrical segment 71 between the compression plate 6 and the upper end surface 72 of the flange structure of the compression ring 7.

[0042] The compression plate 3, the bolt 8, and the nut 9 are used to compress the compression ring 7, so that the first sealing structure and the second sealing structure are effective. At the same time, the spring 5 can eliminate the vibration of the filter element 1 caused by high-frequency backwashing and reduce the influence on the sealing structure of the filter element 1.

[0043] In this embodiment, the first gasket 2 can be a high-temperature-resistant glass fiber or ceramic fiber gasket. The second gasket 4 can be an annular graphite ring or a ceramic fiber ring gasket. The spring 5 is made of Inconle, Monel, or Hastelloy materials which are resistant to high temperature.

[0044] Optionally, the filter core cylinder segment 11, the compression ring cylinder segment 71 and the second gasket 4 are coaxially arranged, so that the first gasket 2 and the second gasket 4 are not easy to deform.

[0045] In summary, the utility model provides a kind of high temperature filter core sealing structure, this high temperature filter core sealing structure optimizes and improves the second sealing structure of filter core and compression ring connection, in second gasket is fixed between filter core, compression ring simultaneously, form second sealing structure between filter core, compression ring and tube sheet, avoid the inclination of filter core, plate and second gasket in installation process, misalignment;And avoid the transverse displacement caused by high-frequency vibration, make sealing more reliable.Design is compact, simple structure, easy to manufacture, reduce filter core leakage risk point, ensure that filter core long period, continuously, stable operation.

[0046] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited to this, any change or replacement within the technical scope disclosed in the present application should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A high-temperature filter element sealing structure, characterized in that: comprising a filter element, a tube plate and a pressure ring, the lower end of the filter element is a cylindrical filter element cylinder section, the upper end of the filter element is a special-shaped structure, the pressure ring is arranged directly above the filter element, the tube plate is sleeved outside the special-shaped structure and the lower end of the pressure ring, and the tube plate cooperates with the special-shaped structure; a first gasket is arranged between the outer side of the special-shaped structure and the inner side wall of the tube plate, a second gasket is arranged between the pressure ring and the filter element, the outer end face of the second gasket abuts against the tube plate, and the filter element, the pressure ring and the tube plate are sealed through the second gasket.

2. The high-temperature filter element sealing structure according to claim 1, characterized in that: the tube plate is provided with a special-shaped through hole, the through hole is provided with a large-diameter through hole and a small-diameter through hole from top to bottom, and the large-diameter through hole and the small-diameter through hole are connected through a through hole inclined surface; the outer end face size of the special-shaped structure is greater than the size of the filter element cylinder section, the outer end face size of the special-shaped structure is less than the size of the large-diameter through hole of the tube plate, and the outer end face size of the special-shaped structure is greater than the size of the small-diameter through hole of the lower end of the tube plate, so that the filter element can pass through the through hole of the tube plate from top to bottom and can be suspended in the through hole of the tube plate.

3. The high-temperature filter element sealing structure according to claim 2, characterized in that: the special-shaped structure is provided with a first inclined surface corresponding to the position of the through hole inclined surface, and the first gasket is located between the first inclined surface and the through hole inclined surface; the upper surface of the special-shaped structure is a first convex structure, the first convex structure comprises a first sealing plane, a filter element upper end face and a first sealing side face, and the lower part of the second gasket is sleeved on the first convex structure.

4. The high-temperature filter element sealing structure according to claim 3, characterized in that: the upper end of the pressure ring is a pressure ring cylinder section, the lower end of the pressure ring is a flange structure, the flange structure comprises an upper end face, a second sealing plane, a lower end face, a second sealing side face and a pressure ring outer diameter, the size of the pressure ring outer diameter is less than the size of the large-diameter through hole and greater than the size of the small-diameter through hole; the second sealing plane, the lower end face and the second sealing side face form a downward second convex structure, the second convex structure is arranged opposite to the first convex structure, and the opposite face sizes are consistent, and the second gasket is sleeved on the second convex structure and the first convex structure.

5. The high-temperature filter element sealing structure according to claim 4, characterized in that: a threaded hole is formed in the upper surface of the tube plate, a bolt is installed in the threaded hole, a pressure plate is fixed on the bolt, the pressure ring cylinder section penetrates through the pressure plate, and the pressure plate is fastened through a nut matched with the bolt.

6. The high-temperature filter element sealing structure according to claim 4 or 5, characterized in that: the filter element cylinder section, the pressure ring cylinder section and the second gasket are coaxially arranged. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​

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