High-temperature dust collector filter element sealing structure

Abstract

The present invention provides a sealing structure for a high-temperature dust collector filter element, including a filter element and a pressure seat. Among them, the pressure seat is located above the filter element, the pressure seat is of a cylindrical structure, one end of the pressure seat faces the filter element, and a first sealing member is arranged between one end of the pressure seat and one end of the filter element. The pressure seat can press the first sealing member to achieve sealing. The head of the filter element of this sealing structure adopts a plane, enabling the filter element to have a complete head, improving the overall strength and service life of the filter element, avoiding secondary processing of the filter element, and not affecting the reuse of the filter element under high-temperature operating conditions. The first sealing member is extruded by the outer inclined surface of the frustum at the lower section of the pressure seat to generate an outward acting force in the radial direction, forming a secondary radial sealing effect. Double sealing is achieved through the first sealing member and the second sealing member, which can effectively prevent the problem of easy failure of a single sealing gasket, and improve the sealing reliability and service life of the filter element under different working conditions.

Description

Technical Field

[0001] The present invention relates to the field of gas, oil and gas, and high-temperature flue gas treatment and filtration, and particularly relates to a sealing structure for a filter element of a high-temperature dust collector. Background Art

[0002] The dust removal filter is one of the key equipment in gasification processes such as SHELL, E-GAS, U-GAS, and circulating fluidized bed, and is used in gas-solid separation processes with harsh process conditions such as high temperature, high pressure, and corrosion. Its main purpose is to filter and intercept the dust in the raw gas generated after coal gasification through a filter element (ceramic or metal).

[0003] The filter element is the core component of the dust removal filter. The quality of the sealing performance of the filter element will directly affect the operation effect of the filter. Generally speaking, the sealing of the filter element mainly adopts a structure of nut tightening + gasket sealing or spring pressing + gasket sealing. The commonly used sealing gaskets are mainly high-temperature-resistant graphite, silicone rubber gaskets, and inorganic ceramic gaskets.

[0004] For the structure of nut tightening + gasket sealing, the connection and sealing are simple, the cost is low, and the operation is convenient. However, when using this gasket sealing method, it is extremely easy for the local resilience of the gasket to weaken during the long-term and frequent impact and vibration of the filter element, resulting in seal failure and leakage. In addition, in high-temperature and corrosive environments, corrosion is likely to occur between the nut and the filter element thread, causing jamming and making it difficult to disassemble. For the structure of spring pressing + gasket sealing, during the operation of the dust removal filter, when the filter element is subjected to instantaneous impact during backwashing or filtration, it is extremely easy to generate a certain angle of deflection, resulting in uneven force on the annular sealing gasket. Under the long-term action of this, the sealing surface will leak due to local failure of the gasket. Along with this is the erosion of the sealing surface of the filter element pipe orifice, generating deep scratches, which will further damage the filter element and the equipment, greatly affecting the normal operation of the filter.

[0005] Chinese Patent with publication number CN106474843A discloses a filter device, and the adopted sealing method is that on the outer side of the special-shaped end face of the filter element is a concave platform, and the inner circumferential surface is inclined. A graphite sealing ring is sleeved on the concave platform, so that the inner side surface of the graphite sealing ring presses against the inner circumferential surface of the special-shaped end face of the filter element. However, when using this structure, since the filter element itself is a porous medium with low overall strength, and the inner wall of the concave platform of the filter element is thin, and the wall thickness of the outer concave platform of the special-shaped end face of the filter element is small, after the filter element runs at high temperature for a period of time, the inner wall of the outer concave platform of the special-shaped end face of the filter element is easily damaged, which will affect the reuse of the filter element. Using the welding sealing method is relatively reliable, but when replacing the filter element, the whole group of filter elements needs to be replaced, and the maintenance operation cost is relatively high.

[0006] Therefore, a simple and efficient filter element sealing form is needed to ensure that the sealing surface of the filter element does not leak, and thus the service life of the filter element can be extended. Summary of the Invention

[0007] The object of the present invention is to provide a sealing structure for a filter element of a high-temperature dust collector. This filter element sealing structure uses a pressing seat to press a first sealing member, and the first sealing member forms a double seal with a second sealing member, effectively preventing problems such as easy damage and failure of a single sealing gasket, easy leakage, difficult maintenance, and low reliability, and improving the sealing reliability and service life of the filter element under different working conditions.

[0008] To achieve the above object, the present invention provides the following technical solutions:

[0009] A sealing structure for a filter element of a high-temperature dust collector, comprising a filter element and a pressing seat. Among them, the pressing seat is located above the filter element, the pressing seat is a cylindrical structure, one end of the pressing seat faces the filter element, and a first sealing member is arranged between one end of the pressing seat and one end of the filter element, and the pressing seat can press the first sealing member to achieve sealing.

[0010] Further, in the above-mentioned sealing structure for a filter element of a high-temperature dust collector, the first sealing member is an O-ring gasket. The O-ring gasket is a ring formed by a cylinder, and the longitudinal section of the first sealing member is circular.

[0011] Further, in the above-mentioned sealing structure for a filter element of a high-temperature dust collector, a tube plate is further included. A through hole is provided on the tube plate, and one end of the pressing seat and one end of the filter element are both located in the through hole.

[0012] Further, in the above-mentioned sealing structure for a filter element of a high-temperature dust collector, the filter element is a cylindrical structure. The filter element includes a head and a trunk connected in sequence. One end of the head faces the pressing seat, the other end of the head is connected to the trunk, the surface of one end of the head is a plane, and the first sealing member is placed on the surface of one end of the head.

[0013] Further, in the above-mentioned sealing structure for a filter element of a high-temperature dust collector, the pressing seat is in a columnar structure. The pressing seat includes an upper section, a middle section, and a lower section connected in sequence from top to bottom. The lower section is a frustum of a cone, the upper end of the lower section is the large end, and the outer diameter of the upper end of the lower section is smaller than the outer diameter of the middle section. A receiving groove is formed between the outer surface of the lower section, the lower surface of the middle section, and the side wall of the through hole. The receiving groove is used to receive the first sealing member, so that the first sealing member is sleeved on the pressing seat, the inner side surface of the first sealing member abuts against the outer surface of the lower section, and the outer side surface of the first sealing member fits against the side wall of the through hole.

[0014] Further, in the above-mentioned high-temperature dust collector filter element sealing structure, the outer diameter of the head is greater than that of the trunk, and there is an outer surface of a first inclined plane in the shape of a ring between the head and the trunk. The outer surface of the head and the outer surface of the trunk are connected by the first inclined plane. The lower end of the through hole has an inner wall of a second inclined plane. The cooperation between the first inclined plane and the second inclined plane can make the head of the filter element be stuck in the through hole.

[0015] Further, in the above-mentioned high-temperature dust collector filter element sealing structure, a second sealing member is arranged between the first inclined plane and the second inclined plane. Preferably, the second sealing member is a sealing gasket; preferably, the inclination angles of the first inclined plane and the second inclined plane are the same.

[0016] Further, in the above-mentioned high-temperature dust collector filter element sealing structure, it further includes a gland. The gland is provided with a mounting hole, and the gland is sleeved on the upper section through the mounting hole. It further includes a bolt. Threaded holes are arranged at positions corresponding to the gland and the tube plate. One end of the bolt passes through the threaded hole on the gland and then reaches the threaded hole of the tube plate and is threadedly connected to the tube plate. The other end of the bolt is located above the gland and is fixed by a nut. Rotating the nut can make the gland move towards the tube plate.

[0017] Further, in the above-mentioned high-temperature dust collector filter element sealing structure, it further includes a pressing member. The outer diameter of the upper section is smaller than that of the middle section. The pressing member is sleeved on the outer surface of the upper section. The top end of the pressing member contacts the gland, and the bottom end of the pressing member contacts the middle section. The movement of the gland can press and adjust the pressing member, and further enable the pressing seat to press the first sealing member.

[0018] Further, in the above-mentioned high-temperature dust collector filter element sealing structure, the pressing member is an elastic member or a non-elastic member; preferably, the pressing member is a spring; preferably, the pressing member is a sleeve.

[0019] Analysis shows that the present invention discloses a sealing structure for the filter element of a high-temperature dust collector. The head of the filter element of this sealing structure adopts a plane, enabling the filter element to have a complete head, improving the overall strength and service life of the filter element, avoiding secondary processing of the filter element, and not affecting the reuse of the filter element under high-temperature operating conditions. This sealing structure can prevent the filter element from tilting during the instantaneous impact in the backwashing or filtering process, ensuring the filtering effect. The first sealing member is extruded by the outer inclined surface of the frustum at the lower section of the pressure seat to generate an outward acting force on the radial direction, forming a secondary radial sealing effect. The first sealing member is evenly stressed, preventing leakage caused by local failure of the first sealing member and ensuring the normal operation of the filter. Double sealing is achieved through the first sealing member and the second sealing member, which can effectively prevent the problem of easy failure of a single sealing gasket, improving the sealing reliability and service life of the filter element under different working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The schematic diagrams in the specification forming a part of this application are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. Among them:

[0021] Figure 1 is a schematic structural diagram of an embodiment of the present invention.

[0022] Figure 2 is a schematic structural diagram of the pressure seat of an embodiment of the present invention.

[0023] Figure 3 is a schematic structural diagram of the filter element of an embodiment of the present invention.

[0024] Description of the reference numerals: 1 filter element; 11 head; 12 trunk; 13 first inclined surface; 2 second sealing member; 3 tube plate; 31 through hole; 32 convex edge; 33 second inclined surface; 4, first sealing member; 5 pressure seat; 51 upper section, 52 middle section; 53 lower section; 6 pressing member; 7 pressing cover; 8 bolt; 9 nut. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] The present invention will be described in detail below with reference to the drawings and in conjunction with the embodiments. Each example is provided by way of explanation of the present invention rather than limitation of the present invention. In fact, those skilled in the art will clearly understand that modifications and variations can be made to the present invention without departing from the scope or spirit of the present invention. For example, the features shown or described as part of one embodiment can be used in another embodiment to generate yet another embodiment. Therefore, it is desirable that the present invention includes such modifications and variations that fall within the scope of the appended claims and their equivalents.

[0026] In the description of the present invention, the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention rather than requiring the present invention to be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. The terms "connected", "connected to", and "disposed" used in the present invention should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection; it can be directly connected or indirectly connected through an intermediate component; it can be a wired connection, a radio connection, or a wireless communication signal connection. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0027] One or more examples of the present invention are shown in the accompanying drawings. The detailed description uses numerical and alphabetical labels to refer to the features in the drawings. Similar or like labels in the drawings and the description have been used to refer to similar or like parts of the present invention. As used herein, terms such as "first", "second", and "third" can be used interchangeably to distinguish one component from another, and are not intended to indicate the position or importance of the individual components.

[0028] As Figures 1 to 3 shown, according to an embodiment of the present invention, a high-temperature dust collector filter element sealing structure is provided, which includes a filter element 1 and a pressing seat 5. Among them, the filter element 1 is used to filter the dust in the raw gas generated after the coal is gasified. The filter element 1 has a hollow structure. The pressing seat 5 is located above the filter element 1. The pressing seat 5 is a cylindrical structure. One end of the pressing seat 5 faces the air outlet of the filter element 1 and is connected to the filter element 1. A first sealing member 4 is provided between one end of the pressing seat 5 and one end of the filter element 1. The pressing seat 5 can press the first sealing member 4 to achieve circumferential sealing. The gas enters the filter element 1 along the outer circumferential direction of the filter element 1 through the wall of the filter element 1, and the wall of the filter element 1 is used to filter the dust in the raw gas. The filtered gas entering the filter element 1 is discharged through the pressing seat 5.

[0029] Furthermore, the first sealing member 4 is an O-ring gasket. The O-ring gasket is a ring formed by a cylinder and is integrally circular. The longitudinal section of the first sealing member 4 is circular; the first sealing member 4 is selected from a soft material and is compressible. Preferably, the material of the first sealing member 4 can be graphite, perfluororubber, etc.

[0030] Furthermore, the sealing structure further includes a tube sheet 3. A through hole 31 is provided on the tube sheet 3. One end of the pressing seat 5 and one end of the filter element 1 are both located in the through hole 31. Such a setting can use the pressing seat 5 to press the head 11 of the filter element 1 in the through hole 31 to prevent the filter element 1 from being deflected during the instantaneous impact in the backwashing or filtering process, ensuring the filtering effect.

[0031] Furthermore, as Figure 3 shown, the filter element 1 is a cylindrical structure. The filter element 1 includes a head 11 and a trunk 12 connected in sequence. One end of the head 11 faces the pressure seat 5, and the other end of the head 11 is connected to the trunk 12. The surface of one end of the head 11 of the filter element 1 is a plane, and the first seal 4 is placed on the surface of one end of the head 11. Since the head 11 of the filter element 1 adopts a plane design, the filter element 1 has a complete head, which improves the overall strength and service life of the filter element 1, avoids secondary processing of the filter element 1, and does not affect the reuse of the filter element 1 under high-temperature operating conditions.

[0032] Furthermore, as Figure 2 shown, the pressure seat 5 is in a columnar structure. The pressure seat 5 is a one-piece metal solid part. The pressure seat 5 includes an upper section 51, a middle section 52, and a lower section 53 connected in sequence from top to bottom. The lower section 53 is a frustum (abnormal end). The upper end of the lower section 53 is the large end. The outer diameter of the upper end of the lower section 53 is smaller than the outer diameter of the middle section 52. A receiving groove is formed between the outer surface of the lower section 53 of the pressure seat 5, the lower surface of the middle section 52, and the side wall of the through hole 31. The receiving groove is used to receive the first seal 4, so that the first seal 4 can be sleeved on the lower section 53 of the pressure seat 5. The inner side surface of the first seal 4 presses against the outer surface of the lower section 53 of the pressure seat 5, and the outer side surface of the first seal 4 fits against the side wall of the through hole 31. That is, the upper section 51 of the pressure seat 5 is columnar. The outer surface of the abnormal end at the bottom of the pressure seat 5 (the outer surface of the lower section 53 of the pressure seat 5) is a concave platform (the outer diameter of the upper end of the lower section 53 of the pressure seat 5 is smaller than the outer diameter of the middle section 52 to form a concave platform). The inner circumferential surface of the concave platform is the outer surface of the lower section 53 (the outer surface of the frustum is the inclined surface). One end of the pressure seat 5 is inserted into the hole of the tube sheet 3. The middle section 52 and the lower section 53 of the pressure seat 5 are both placed in the through hole 31 of the tube sheet 3, so that the inner side surface of the first seal 4 presses against the outer surface of the end face of the abnormal end of the pressure seat 5, and the outer side surface of the first seal 4 fits against the side wall of the through hole 31 on the tube sheet 3. Preferably, the included angle between the outer side surface of the lower section 53 of the pressure seat 5 and the vertical direction is 5° to 45°. When the pressure seat 5 presses the first seal 4 downward, the first seal 4 will first be deformed by force to form the first seal; as the force increases, the outer side surface of the lower section 53 squeezes the inner side surface of the first seal 4, so that the first seal 4 will be pressed on the lower section 53 of the pressure seat 5. The inner side wall of the first seal 4 is closely attached to the outer surface of the lower section 53, and the outer side surface of the first seal 4 is closely attached to the side wall of the through hole 31. The outer inclined surface of the frustum of the lower section 53 squeezes to generate an outward acting force on the radial direction to form a secondary radial sealing effect.

[0033] Furthermore, as Figure 3As shown, the outer diameter of the head 11 of the filter element 1 is greater than that of the trunk 12. There is an outer surface of a first inclined surface 13 in the shape of a ring between the head 11 and the trunk 12 of the filter element 1. The outer surface of the head 11 and the outer surface of the trunk 12 are connected by the first inclined surface 13. The lower end of the through hole 31 has an inner wall of a second inclined surface 33. A convex edge 32 extending into the through hole 31 is provided on the side wall of the bottom of the through hole 31. The cross section of the convex edge 32 is a right triangle structure. One right side of the right triangle is connected to the tube plate 3, the hypotenuse of the right triangle faces into the through hole 31, and the hypotenuse of the right triangle is the second inclined surface 33. The cooperation between the first inclined surface 13 of the filter element 1 and the second inclined surface 33 of the tube plate 3 can make the head 11 of the filter element 1 be stuck in the through hole 31. Such a setting can use the pressing seat 5 to press the first seal 4 and the filter element 1 to realize the pressing of the filter element 1. During the instantaneous impact in the backwashing or filtering process, it can prevent the filter element 1 from being tilted, the first seal 4 is evenly stressed, prevent leakage caused by local failure of the first seal 4, and ensure the normal operation of the filter.

[0034] Further, as Figure 3 shown, a second seal 2 is provided between the first inclined surface 13 of the filter element 1 and the second inclined surface 33 of the tube plate 3. The second seal 2 is a ring structure. When the pressing seat 5 is pressed downward, the second seal 2 can seal the gap between the first inclined surface 13 and the second inclined surface 33. Preferably, the second seal 2 is a sealing gasket; preferably, the inclination angles of the first inclined surface 13 and the second inclined surface 33 are the same. Such a setting can achieve double sealing through the first seal 4 and the second seal 2, effectively prevent the problem of easy failure of a single sealing gasket, and improve the sealing reliability and service life of the filter element 1 under different working conditions.

[0035] Further, as Figure 1As shown in the figure, the sealing structure further includes a gland 7. The gland 7 is provided with a mounting hole, and the gland 7 is sleeved on the upper section 51 of the pressure seat 5 through the mounting hole. The sealing structure further includes a bolt. Corresponding positions of the gland 7 and the tube sheet 3 are both provided with screw holes. One end of the bolt passes through the screw hole on the gland 7 and then reaches the screw hole of the tube sheet 3 and is threadedly connected to the tube sheet. The other end of the bolt is located above the gland and is fixed by a nut. The nut 9 is arranged above the gland 7. Rotating the nut can make the gland 7 move towards the tube sheet 3. The sealing structure further includes a pressing member 6. The outer diameter of the upper section 51 of the pressure seat 5 is smaller than the outer diameter of the middle section 52, so that a step is formed at the connection between the upper section 51 and the middle section 52 of the pressure seat 5. The pressing member 6 is sleeved on the outer surface of the upper section 51 of the pressure seat 5. The top end of the pressing member 6 contacts the gland 7, and the bottom end of the pressing member 6 contacts the middle section 52 at the step formed by the upper section 51 and the middle section 52. The movement of the gland 7 can compress and adjust the extrusion of the pressing member 6. The pressing member 6 is arranged between the gland 7 and the pressure seat 5. The gland 7 acts on the pressure seat 5 through the pressing member 6. The downward pre-tightening force generated by the pressing member 6 is vertically transmitted to the first seal 4, the filter element 1 and the second seal 2 through the pressure seat 5, and then the first seal 4 and the second seal 2 can be compressed by the downward movement of the pressure seat 5. The gland 7 is the pressing plate for the filter element 1. Tightening the nut 9 above the gland 7 downward can squeeze the pressing member 6. The downward force generated by the pressing member 6 is vertically transmitted to the pressure seat 5. The first seal 4 will first be deformed under force to form the first seal; as the force increases, the first seal 4 will press on the lower section 53 of the pressure seat 5 and be extruded by the conical outer slope of the lower section 53 of the pressure seat 5 to generate an outward acting force in the radial direction to form a secondary radial sealing effect. The filter element 1 moves downward under force and squeezes the second seal 2 to seal the gap between the first inclined surface 13 of the filter element 1 and the second inclined surface 33 of the tube sheet 3, forming a double sealing effect.

[0036] Furthermore, the pressing member 6 is an elastic member or a non-elastic member; in an embodiment of the present invention, the pressing member 6 is a spring, and in another embodiment of the present invention, the pressing member 6 is a sleeve.

[0037] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0038] A sealing structure for a high-temperature dust collector filter element. The head 11 of the filter element 1 of this sealing structure adopts a flat surface, enabling the filter element 1 to have a complete head, enhancing the overall strength and service life of the filter element 1, avoiding secondary processing of the filter element 1, and not affecting the reuse of the filter element 1 under high-temperature operating conditions. This sealing structure can prevent the filter element 1 from tilting during instantaneous impacts in the backwashing or filtering process, ensuring the filtering effect. The first seal 4 is extruded by the outer inclined surface of the frustum of the lower section 53 of the pressure seat 5 to generate an outward acting force in the radial direction, forming a secondary radial sealing effect. The first seal 4 is uniformly stressed, preventing leakage caused by local failure of the first seal 4 and ensuring the normal operation of the filter. Double sealing is achieved through the first seal 4 and the second seal 2, which can effectively prevent the problem of easy failure of a single sealing gasket, improving the sealing reliability and service life of the filter element 1 under different working conditions.

[0039] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A sealing structure for a filter element of a high-temperature dust collector, characterized in that, It includes a filter element and a pressure seat. Among them, the pressure seat is located above the filter element. The pressure seat is of a cylindrical structure. One end of the pressure seat faces the filter element. A first seal is arranged between one end of the pressure seat and one end of the filter element. The pressure seat can press the first seal to achieve sealing. It further includes a tube sheet. Through holes are provided on the tube sheet. One end of the pressure seat and one end of the filter element are both located in the through holes. The pressure seat is of a columnar structure. The pressure seat includes an upper section, a middle section and a lower section which are connected in sequence from top to bottom. The lower section is a frustum of a cone. The upper end of the lower section is the large end. The outer diameter of the upper end of the lower section is smaller than the outer diameter of the middle section. A receiving groove is formed between the outer surface of the lower section, the lower surface of the middle section and the side wall of the through hole. The receiving groove is used to receive the first seal, so that the first seal is sleeved on the pressure seat. The inner side surface of the first seal presses against the outer surface of the lower section. The outer side surface of the first seal fits with the side wall of the through hole. The included angle between the outer side surface of the lower section of the pressure seat and the vertical direction is 5° to 45°.

2. The high-temperature dust collector filter element sealing structure according to claim 1, wherein the first seal is an O-ring gasket. The O-ring gasket is a ring formed by a cylinder. The longitudinal section of the first seal is circular.

3. The high-temperature dust collector filter element sealing structure according to claim 1, wherein the filter element is of a cylindrical structure. The filter element includes a head and a trunk which are connected in sequence. One end of the head faces the pressure seat. The other end of the head is connected to the trunk. The surface of one end of the head is a plane. The first seal is placed on the surface of one end of the head.

4. The high-temperature dust collector filter element sealing structure according to claim 3, wherein the outer diameter of the head is larger than the outer diameter of the trunk. There is an outer surface with a first inclined surface in a ring shape between the head and the trunk. The outer surface of the head and the outer surface of the trunk are connected by the first inclined surface. The lower end of the through hole has an inner wall with a second inclined surface. The cooperation of the first inclined surface and the second inclined surface can make the head of the filter element be stuck in the through hole.

5. The high-temperature dust collector filter element sealing structure according to claim 4, wherein a second seal is arranged between the first inclined surface and the second inclined surface.

6. The high-temperature dust collector filter element sealing structure according to claim 5, wherein the second seal is a sealing gasket.

7. The high-temperature dust collector filter element sealing structure according to claim 5, wherein the inclination angles of the first inclined surface and the second inclined surface are the same.

8. The high-temperature dust collector filter element sealing structure according to claim 1, wherein it further includes a gland. The gland is provided with a mounting hole. The gland is sleeved on the upper section through the mounting hole. It further includes bolts. At the corresponding positions of the gland and the tube sheet, screw holes are provided. One end of the bolt passes through the screw hole on the gland and reaches the screw hole on the tube sheet and is threadedly connected to the tube sheet. The other end of the bolt is located above the gland and is fixed by a nut. Rotating the nut can make the gland move towards the tube sheet.

9. The high-temperature dust collector filter element sealing structure according to claim 8, wherein it further includes a pressing member. The outer diameter of the upper section is smaller than the outer diameter of the middle section. The pressing member is sleeved on the outer surface of the upper section. The top end of the pressing member contacts the gland, and the bottom end of the pressing member contacts the middle section. The movement of the gland can press and adjust the pressing member, and further enable the pressing seat to press the first sealing member.

10. The high-temperature dust collector filter element sealing structure according to claim 9, wherein the pressing member is an elastic member or a non-elastic member.

11. The high-temperature dust collector filter element sealing structure according to claim 10, wherein the pressing member is a spring.

12. The high-temperature dust collector filter element sealing structure according to claim 10, wherein the pressing member is a sleeve.

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