External composite expansion joint and desulfurization flue
Through the design of the external composite expansion joint, the detachable arc corrugated plate is used to connect to the outer periphery of the desulfurized flue, which solves the problem of the expansion joint being damaged and needs to be replaced by shutdown, and achieves rapid maintenance and efficient operation.
Patent Information
- Application Number
- CN202422865313.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-22
- Publication Date
- 2025-08-22
- Estimated Expiration
- 2034-11-22
AI Technical Summary
The existing desulfurization flue expansion joints are prone to damage during long-term use, resulting in shutdown and replacement during replacement, affecting the power supply efficiency of the power plant.
The external composite expansion joint is adopted, including multiple removable arc-shaped corrugated plates, connected to the outer periphery of the desulfurization flue, forming an annular structure, allowing the single corrugated plate to be disassembled and replaced, and avoiding shutdown and maintenance.
The rapid maintenance of expansion joints is achieved, the maintenance workload is reduced, the losses caused by shutdown are avoided, and the working efficiency of the desulfurization flue is improved.
Smart Images
Figure CN223257809U_ABST
Abstract
Description
Technical Field
[0001] The present disclosure relates to the technical field of desulfurization flues in power plants, and in particular to an externally mounted composite expansion joint and a desulfurization flue. Background Art
[0002] Current power plants produce waste gas containing sulfur during operation, and desulfurization flues need to be set up to desulfurize the waste gas.
[0003] Existing desulfurization flue expansion joints are usually made of rubber or metal + polytetrafluoroethylene lining. They will be damaged after long-term use and need to be replaced. In addition, since the diameter of the desulfurization flue of a power plant is usually around 10 meters, the internal polytetrafluoroethylene lining of the expansion joint needs to be pressed under the acid-resistant bricks inside the flue during replacement / installation. Therefore, once the expansion joint is broken, the flue must be stopped during replacement, causing the boiler to shut down, seriously affecting the power supply efficiency. Utility Model Content
[0004] A technical problem to be solved by the present disclosure is: how to make the maintenance of expansion joints more convenient and quick, so as to reduce the downtime losses of power plants caused by the maintenance of expansion joints.
[0005] In order to solve the above technical problems, the embodiment of the present disclosure provides an externally mounted composite expansion joint, which includes a plurality of arc-shaped corrugated plates, which can be detachably connected to the outer periphery of the desulfurization flue. The plurality of arc-shaped corrugated plates can be connected in sequence to form an annular structure arranged at the outer periphery of the desulfurization flue to absorb the expansion and contraction deformation of the desulfurization flue.
[0006] In some embodiments, the arcuate corrugated plate includes a metal layer located radially outside the annular structure and a first anti-corrosion layer located radially inside the annular structure.
[0007] In some embodiments, the desulfurization flue includes a first flue and a second flue, and the externally mounted composite expansion joint also includes a first flange and a second flange that can be fixed to the outer periphery of the first flue and the second flue, respectively, and the arc-shaped corrugated plate is detachably connected to the first flange and the second flange at both ends along the axial direction of the annular structure.
[0008] In some embodiments, a second anti-corrosion layer is provided on the first flange and the second flange.
[0009] In some embodiments, the arcuate corrugated plate is connected to the first flange and the second flange by bolts.
[0010] In some embodiments, the arc-shaped corrugated plate is provided with a plurality of corrugations extending along the circumference of the annular structure.
[0011] In some embodiments, the annular structure can adapt to desulfurization flues of different diameters by increasing or decreasing the number of arc-shaped corrugated plates.
[0012] In some embodiments, two adjacent curved corrugated plates are connected by bolts.
[0013] In some embodiments, a sealing strip is provided between two adjacent curved corrugated plates.
[0014] The present disclosure also provides a desulfurization flue, on which the above-mentioned externally mounted composite expansion joint is installed.
[0015] Through the above technical solution, the externally mounted composite expansion joint and desulfurization flue provided by the present invention connect multiple arc-shaped corrugated plates in sequence to form an annular structure that can be set on the periphery of the desulfurization flue. When the expansion joint is partially damaged, the single arc-shaped corrugated plate can be disassembled and replaced. Since the arc-shaped corrugated plate is connected to the periphery of the flue, maintenance can be carried out without shutting down the boiler, which not only reduces the maintenance workload of the expansion joint, but also avoids the occurrence of shutdown maintenance. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.
[0017] Figure 1 It is a cross-sectional schematic diagram of a desulfurization flue expansion joint and a desulfurization flue in the prior art;
[0018] Figure 2 It is a cross-sectional schematic diagram of the externally mounted composite expansion joint and the desulfurization flue disclosed in the embodiment of the present disclosure;
[0019] Figure 3 is a partial cross-sectional schematic diagram of the curved corrugated plate disclosed in an embodiment of the present disclosure;
[0020] Figure 4 is a front view of the curved corrugated plate disclosed in an embodiment of the present disclosure;
[0021] Figure 5 is a top view of the curved corrugated plate disclosed in an embodiment of the present disclosure;
[0022] Figure 6 It is a schematic diagram of the local structure of the connection between the expansion joint and the desulfurization flue disclosed in the embodiment of the present disclosure.
[0023] Description of reference numerals:
[0024] 1. Externally mounted composite expansion joint; 101. Curved corrugated plate; 102. Metal layer; 103. First anti-corrosion layer; 104. First flange; 105. Second flange; 106. Second anti-corrosion layer; 107. Sealing strip; 2. Desulfurization flue; 201. First flue; 202. Second flue; 203. Anti-corrosion glass lining brick; 3. Existing expansion joint. DETAILED DESCRIPTION
[0025] The following embodiments of the present disclosure are further described in detail with reference to the accompanying drawings and examples. The detailed description of the following examples and the accompanying drawings are intended to illustrate the principles of the present disclosure, but are not intended to limit the scope of the present disclosure. The present disclosure can be implemented in many different forms and is not limited to the specific embodiments disclosed herein, but rather includes all technical solutions within the scope of the claims.
[0026] The present disclosure provides these embodiments in order to make this disclosure thorough and complete, and to fully convey the scope of the present disclosure to those skilled in the art. It should be noted that: unless otherwise specifically stated, the relative arrangement of parts and steps, the composition of materials, numerical expressions and numerical values set forth in these embodiments should be interpreted as merely exemplary, and not as limiting.
[0027] It should be noted that, in the description of this disclosure, unless otherwise specified, "plurality" means greater than or equal to two; terms such as "upper," "lower," "left," "right," "inner," and "outer" indicating directions or positional relationships are intended solely to facilitate and simplify the description of this disclosure, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this disclosure. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.
[0028] In addition, the terms "first," "second," and similar terms used in this disclosure do not denote any order, quantity, or importance, but are merely used to distinguish different parts. "Perpendicular" does not mean perpendicular in the strict sense, but rather means within the tolerance range. "Parallel" does not mean parallel in the strict sense, but rather means within the tolerance range. "Include" or "comprising" and similar terms mean that the elements preceding the term include the elements listed after the term, and do not exclude the possibility of also including other elements.
[0029] It should also be noted that, in the description of this disclosure, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to direct connections or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in this disclosure depending on the specific circumstances. When a specific device is described as being located between a first device and a second device, there may or may not be an intervening device between the specific device and the first or second device.
[0030] All terms used in this disclosure have the same meaning as understood by one of ordinary skill in the art to which this disclosure belongs, unless otherwise specifically defined. It should also be understood that terms defined in, for example, common dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant art, and should not be interpreted in an idealized or highly formal sense, unless explicitly defined as such herein.
[0031] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.
[0032] like Figure 1-6 As shown, the present disclosure provides an externally mounted composite expansion joint. The externally mounted composite expansion joint 1 includes a plurality of arcuate corrugated plates 101. The arcuate corrugated plates 101 can be detachably connected to the periphery of the desulfurization flue 2. The plurality of arcuate corrugated plates 101 can be connected in sequence to form an annular structure arranged at the periphery of the desulfurization flue 2 to absorb the expansion and contraction deformation of the desulfurization flue 2.
[0033] Specifically, a plurality of arc-shaped corrugated plates 101 are sequentially connected along their own arc direction to form a closed ring structure, and the ring structure is arranged on the periphery of the desulfurization flue 2. Figure 1 Compared with the existing expansion joint 3 pressed into the anti-corrosion glass lining brick 203 inside the desulfurization flue 2 as shown in the figure, when a single or multiple curved corrugated plates 101 are damaged, the staff can directly dismantle and replace them from the outside without shutting down the boiler, which effectively reduces the maintenance workload of the expansion joint and avoids losses caused by shutdown.
[0034] It can be seen that the external composite expansion joint 1 is a flexible connecting component in the flue system, and its two ends are respectively connected to two positions on the flue system with relative displacement to absorb the expansion and contraction deformation of the flue system. Figure 2As shown, the two axial ends of the annular structure can be connected to the two desulfurization flues 2 to absorb the relative displacement between them. In other embodiments, the two ends of the annular structure can be connected to the desulfurization flue 2 and the desulfurization tower or other fixed structure to absorb the relative displacement between them.
[0035] like Figure 3 As shown, in some embodiments, the arcuate corrugated plate 101 includes a metal layer 102 located radially outside the annular structure and a first anti-corrosion layer 103 located radially inside the annular structure.
[0036] Specifically, the metal layer 102 with multiple corrugations serves as the base layer of the curved corrugated plate 101, providing it with good elasticity and stability. The first anti-corrosion layer 103, which is arranged on the radially inner side of the annular structure, is in direct contact with the flue gas in the desulfurization flue 2, providing the curved corrugated plate 101 with good corrosion resistance and protecting the metal layer 102 from being corroded by the flue gas. The two are firmly bonded together, allowing the first anti-corrosion layer 103 to deform along with the deformation of the metal layer 102. The metal layer 102 here can be made of materials such as stainless steel or nickel-based alloy, and the first anti-corrosion layer 103 can be made of a good corrosion-resistant material such as cross-linked polyethylene, polypropylene, high-density polyethylene or polytetrafluoroethylene.
[0037] like Figure 2 As shown, in some embodiments, the desulfurization flue 2 includes a first flue 201 and a second flue 202, and the externally mounted composite expansion joint 1 also includes a first flange 104 and a second flange 105 that can be fixed to the outer periphery of the first flue 201 and the second flue 202, respectively, and the arc-shaped corrugated plate 101 is detachably connected to the first flange 104 and the second flange 105 at both ends along the axial direction of the annular structure.
[0038] Specifically, the first flange 104 and the second flange 105 are connected to the opposite ends of the first flue 201 and the second flue 202, respectively. The annular structure composed of multiple arc-shaped corrugated plates 101 is connected between the two flues to facilitate the relative displacement between the two. In other embodiments, when the externally mounted composite expansion joint 1 is connected to the desulfurization flue 2 and the desulfurization tower or other fixed structure, one end of the externally mounted composite expansion joint 1 is provided with a flange for connecting to the outer periphery of the desulfurization flue 2, and the other end can be connected to the desulfurization tower or other fixed structure via a detachable support.
[0039] like Figure 6 As shown, in some embodiments, a second anti-corrosion layer 106 is provided on the first flange 104 and the second flange 105 .
[0040] Specifically, since the arc-shaped corrugated plate 101 is connected to the outer periphery of the desulfurization flue 2 through the first flange 104 and the second flange 105, the surface of the flange between the arc-shaped corrugated plate 101 and the desulfurization flue 2 will be in direct contact with the corrosive flue gas. In order to avoid corrosion damage to the flange, a second anti-corrosion layer 106 is provided on the surface of the first flange 104 and the second flange 105. The second anti-corrosion layer 106 can be made of good corrosion-resistant materials such as cross-linked polyethylene, polypropylene, high-density polyethylene or polytetrafluoroethylene.
[0041] like Figure 2 and Figure 6 As shown, in some embodiments, in order to save materials, a second anti-corrosion layer 106 can be provided on the two opposite surfaces of the first flange 104 and the second flange 105. At the same time, the second anti-corrosion layer can extend inward to intersect with the anti-corrosion glass lining bricks 203 inside the desulfurization flue 2, which can also protect the pipe wall of the desulfurization flue 2.
[0042] like Figure 4 and Figure 6 As shown, in some embodiments, the arcuate corrugated plate 101 is connected to the first flange 104 and the second flange 105 by bolts.
[0043] Specifically, corresponding bolt holes are provided on the curved corrugated plate 101, the first flange 104, and the second flange 105. Bolted connection between the two facilitates replacement of damaged curved corrugated plates 101, improving maintenance efficiency. In other embodiments, the two can be connected using self-tapping screws or slots. To improve sealing, sealing material can be placed in the slots.
[0044] like Figure 2-Figure 5 As shown, in some embodiments, the arcuate corrugated plate 101 is provided with a plurality of corrugations extending along the circumference of the annular structure.
[0045] Specifically, in order to improve the axial expansion and contraction capability of the externally mounted composite expansion joint 1 along the desulfurization flue 2, multiple corrugations are provided on the arc-shaped corrugated plate 101, which can effectively eliminate the vibration generated by the desulfurization flue 2 during operation or the axial expansion and contraction caused by temperature changes.
[0046] like Figure 2 and Figure 5 As shown, in some embodiments, the annular structure can adapt to desulfurization flues 2 of different diameters by increasing or decreasing the number of arc-shaped corrugated plates 101 .
[0047] Specifically, based on the elasticity brought by the metal layer 102 of the arc-shaped corrugated plate 101, when facing desulfurization flues 2 of different diameters, the diameter of the desulfurization flue 2 can be changed by changing the number of arc-shaped corrugated plates 101 so that it can fit the outer periphery of the desulfurization flue 2, thereby improving the applicability of the externally mounted composite expansion joint 1.
[0048] like Figure 4 As shown, in some embodiments, two adjacent curved corrugated plates 101 are connected by bolts.
[0049] Specifically, the curved corrugated plates 101 are provided with corresponding bolt holes at both ends along their own arcs. Two adjacent curved corrugated plates 101 are connected by bolts, which facilitates the replacement of a single or multiple curved corrugated plates 101 on the annular structure. In other embodiments, two adjacent curved corrugated plates 101 can also be connected by snap fastening or rivets.
[0050] like Figure 4 and Figure 5 As shown, in some embodiments, a sealing strip 107 is provided between two adjacent curved corrugated plates 101 .
[0051] Specifically, the sealing strip 107 provided at the connection between the two arc-shaped corrugated plates 101 can be made of rubber material, so that the sealing strip 107 can absorb the vibration between the two adjacent arc-shaped corrugated plates 101 while providing sealing performance, thereby extending the service life of the externally mounted composite expansion joint 1 and improving the stability and economy of the flue system during operation.
[0052] The present disclosure also provides a desulfurization flue, on which the above-mentioned externally mounted composite expansion joint is installed. A plurality of curved corrugated plates 101 are sequentially connected to form an annular structure that can be installed on the periphery of the desulfurization flue 2. When the externally mounted composite expansion joint 1 is partially damaged, a single curved corrugated plate 101 can be removed and replaced. Since the curved corrugated plates 101 are connected to the periphery of the flue, maintenance can be carried out without shutting down the boiler, which not only reduces the maintenance workload of the externally mounted composite expansion joint 1, but also avoids the need for shutdown for maintenance, effectively improving the working efficiency of the desulfurization flue 2.
[0053] Thus far, various embodiments of the present disclosure have been described in detail. To avoid obscuring the concept of the present disclosure, some details known in the art have not been described. Based on the above description, those skilled in the art can fully understand how to implement the technical solutions disclosed herein.
[0054] Although some specific embodiments of the present disclosure have been described in detail through examples, those skilled in the art will understand that the above examples are for illustrative purposes only and are not intended to limit the scope of the present disclosure. Those skilled in the art will understand that the above embodiments may be modified or some technical features may be replaced with equivalents without departing from the scope and spirit of the present disclosure. In particular, as long as there are no structural conflicts, the various technical features mentioned in the various embodiments may be combined in any manner.
Claims
1. An externally mounted composite expansion joint, characterized in that: The externally mounted composite expansion joint (1) comprises a plurality of arcuate corrugated plates (101), wherein the arcuate corrugated plates (101) can be detachably connected to the outer periphery of the desulfurization flue (2), and the plurality of arcuate corrugated plates (101) can be sequentially connected to form an annular structure arranged on the outer periphery of the desulfurization flue (2) to absorb the expansion and contraction deformation of the desulfurization flue (2).
2. The externally mounted composite expansion joint according to claim 1, characterized in that: The arc-shaped corrugated plate (101) comprises a metal layer (102) located radially outside the annular structure and a first anti-corrosion layer (103) located radially inside the annular structure.
3. The externally mounted composite expansion joint according to claim 1, characterized in that: The desulfurization flue (2) includes a first flue (201) and a second flue (202), and the externally mounted composite expansion joint (1) also includes a first flange (104) and a second flange (105) that can be fixed to the outer periphery of the first flue (201) and the second flue (202), respectively. The arcuate corrugated plate (101) is detachably connected to the first flange (104) and the second flange (105) at both ends along the axial direction of the annular structure.
4. The externally mounted composite expansion joint according to claim 3, characterized in that: A second anti-corrosion layer (106) is provided on the first flange (104) and the second flange (105).
5. The externally mounted composite expansion joint according to claim 3, characterized in that: The arc-shaped corrugated plate (101) is connected to the first flange (104) and the second flange (105) by bolts.
6. The externally mounted composite expansion joint according to claim 1, characterized in that: The arc-shaped corrugated plate (101) is provided with a plurality of corrugations extending along the circumference of the annular structure.
7. The externally mounted composite expansion joint according to claim 1, characterized in that: The annular structure can adapt to the desulfurization flue (2) of different diameters by increasing or decreasing the number of the arc-shaped corrugated plates (101).
8. The externally mounted composite expansion joint according to claim 1, characterized in that: Two adjacent arc-shaped corrugated plates (101) are connected by bolts.
9. The externally mounted composite expansion joint according to claim 1, characterized in that: A sealing strip (107) is provided between two adjacent arc-shaped corrugated plates (101).
10. A desulfurization flue, characterized in that: The desulfurization flue is installed with an externally mounted composite expansion joint as described in any one of claims 1 to 9.