Flexible connection structure for butt joint of flues of high-temperature furnace
Through the combination of high-temperature resistant cloth and high-temperature thermal protection coating and the design of the support frame, the eccentric connection problem between the flue of the high-temperature calcinerator and the heat exchanger interface is solved, and the stable and accurate connection effect is achieved, and the high-temperature hot smoke is ensured. sealability.
Patent Information
- Application Number
- CN202421118296.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-22
- Publication Date
- 2025-02-11
- Estimated Expiration
- 2034-05-22
AI Technical Summary
When the flue of the high-temperature calciner is connected to the reserved interface of the heat exchanger, the two pipe ports cannot be connected concentrically due to site restrictions, size of the pipe port, and the connecting flange of the pipe port. It is difficult to achieve bolted connection.
A soft connection structure with high temperature resistant cloth is adopted, including the cavity between the inner layer cloth and the outer layer cloth, high temperature thermal protection coating is injected and cured to form a stable connection structure, and a support frame is installed at both ends of the high temperature resistant cloth to achieve stability soft connection.
The eccentric and stable and accurate connection between the flue interface and the heat exchanger interface is achieved, which prevents high-temperature hot smoke from overflowing from the connection, and ensures the stability and sealing of the soft connection structure.
Smart Images
Figure CN222460317U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of waste heat utilization of high-temperature furnaces, and in particular to a high-temperature furnace flue butt-jointed soft connection structure. Background Art
[0002] High temperature calcining furnace is a main equipment of thermal equipment that heat treats raw materials at high temperature to improve the performance of raw materials. It has the characteristics of low energy consumption, good calcination quality, long furnace life, easy operation, etc. When the calcining furnace is working, a large amount of high temperature flue gas directly enters the chimney through the flue. In the existing technology, the waste heat in the flue gas is usually absorbed by the heat exchanger, so as to realize the reuse of waste heat and achieve the purpose of energy saving and environmental protection.
[0003] However, when the flue of the high-temperature calcining furnace is connected to the reserved interface of the heat exchange component, the two pipe openings cannot be connected concentrically due to site limitations, pipe opening size, pipe opening position and other reasons, and the connecting flanges of the pipe openings are difficult to achieve bolt connection.
[0004] Therefore, in view of the above technical problems, how to ensure the stable connection of the two pipe openings is a technical problem that technical personnel in this field need to solve. Utility Model Content
[0005] The purpose of the present application is to provide a high-temperature furnace flue butt joint soft connection structure, which adopts a soft connection form of high-temperature resistant cloth, so that the flue interface and the heat exchange component interface can be more conveniently and accurately connected, and after the high-temperature thermal protection coating is cured, a relatively stable connection structure is formed, so that the two pipe openings can be connected more stably.
[0006] To achieve the above-mentioned purpose, the present application provides a high-temperature furnace flue butt joint soft connection structure, which is used to connect the flue interface and the heat exchange component interface, including:
[0007] The high temperature resistant cloth comprises an inner cloth and an outer cloth located at the periphery of the inner cloth, a cavity is provided between the inner cloth and the outer cloth, and the inner cloth surrounds to form a flue;
[0008] A high temperature heat protection coating is injected into the cavity and cured in the cavity;
[0009] The support frames are located at both ends of the high temperature resistant cloth, and are used to connect the inner layer cloth and the outer layer cloth. The two support frames are respectively connected to the flue interface and the heat exchange component interface.
[0010] Preferably, the inner layer of cloth and the outer layer of cloth are both arranged in an annular shape to form an annular cavity between the inner layer of cloth and the outer layer of cloth.
[0011] Preferably, the support frame is an annular support frame, each of which is used to connect the inner layer of cloth and the outer layer of cloth at the same end to form an annular cavity closed at both ends, the middle opening of one annular support frame is used to connect the flue interface and the flue, and the middle opening of another annular support frame is used to connect the flue and the heat exchange component interface.
[0012] Preferably, the inner ring of the annular support frame is fixedly connected to the inner layer of cloth, the inner ring of one annular support frame is coaxially arranged with the flue interface, and the inner diameters of the two are the same; the inner ring of the other annular support frame is coaxially arranged with the heat exchanger interface, and the inner diameters of the two are the same.
[0013] Preferably, the outer ring of the annular support frame is provided with a raised ring extending toward the cavity, one raised ring is coaxially arranged with the flue interface, and the two have the same outer diameter; the other raised ring is coaxially arranged with the heat exchanger interface, and the two have the same outer diameter.
[0014] Preferably, the side of the annular support frame facing away from the cavity is attached to and sealed and fixed to the end surface of the flue interface or the heat exchange component interface.
[0015] Preferably, an angle steel flange for connecting to the flue interface or the heat exchanger interface is provided on the outer periphery of the raised ring, and the outer layer of cloth is fixed to the raised ring through the angle steel flange and bolts.
[0016] Preferably, the high temperature resistant cloth is ceramic fiber cloth, and the high temperature resistant cloth is fixed on the support frame through ceramic fiber yarn.
[0017] Preferably, the outer layer of cloth is provided with an injection port for injecting the high-temperature thermal protective coating and an exhaust port for exhausting the air inside the cavity.
[0018] Preferably, the outer circumference of the outer layer of cloth is covered with an aluminum skin, and the aluminum skin is provided with avoidance holes corresponding to the injection port and the exhaust port.
[0019] Compared with the above background technology, the soft connection structure of the present application utilizes the soft material of the high temperature resistant cloth to realize the eccentric stable and accurate connection of the flue interface and the heat exchanger interface. The high temperature resistant cloth includes an inner layer of cloth and an outer layer of cloth, and there is a cavity between the inner layer of cloth and the outer layer of cloth, and the inner layer of cloth is arranged in an annular manner to form a flue inside it for high temperature hot smoke to pass through. The high temperature heat protection coating is injected into the cavity, and after the high temperature resistant cloth is softly connected with the flue interface and the heat exchanger interface, the high temperature heat protection coating is cured in the cavity to form a stable connection structure. A support frame is set at both ends of the high temperature resistant cloth, one side of the support frame connects the inner layer of cloth and the outer layer of cloth, and the other side is connected to the flue interface or the heat exchanger interface, thereby forming a stable soft connection structure. The present application utilizes the flexible characteristics of the high temperature resistant cloth to realize the staggered connection of the non-concentric flue interface and the heat exchanger interface, ensure the connection effect of the two interfaces, and ensure stable and accurate docking. The high temperature heat protection coating after curing can prevent the high temperature hot smoke from overflowing from the connection, and ensure that the soft connection structure has a good stability effect. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.
[0021] FIG1 is a schematic diagram of a high-temperature furnace flue butt joint flexible connection structure provided in an embodiment of the present application.
[0022] In the figure: 1, flue interface 2, heat exchanger interface 3, inner cloth 4, outer cloth 5, support frame 6, angle steel flange 7, raised ring 8, high-temperature thermal protective coating 9, injection port 10, exhaust port. DETAILED DESCRIPTION
[0023] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.
[0024] It should be noted that in this embodiment, the directions or positional relationships indicated by "upper", "lower", "front", "back", etc. are based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present application. In addition, "first", "second", "third", and "fourth" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.
[0025] In order to enable those skilled in the art to better understand the present application, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.
[0026] As shown in FIG1 , in this embodiment, a high-temperature furnace flue flexible connection structure is provided, which is used to connect a flue interface 1 and a heat exchanger interface 2. The flue interface 1 can be an existing flue main pipe, or an opening on the main pipe, thereby leading out a bypass pipe to facilitate the connection with the heat exchanger interface 2. The heat exchanger can be a heat exchange device such as a thermal oil furnace, which can utilize the waste heat of high-temperature hot smoke to achieve heat exchange.
[0027] The soft connection structure includes high temperature resistant cloth, high temperature heat protection coating 8 and support frame 5. For the high temperature resistant cloth, it has the flexibility of cloth and high temperature resistance, meeting the high temperature requirements of high temperature hot smoke. The high temperature resistant cloth includes an inner cloth 3 and an outer cloth 4 located on the outer periphery of the inner cloth 3. Please refer to Figure 1. The inner cloth 3 is arranged in an annular shape as a whole, that is, a flue is formed inside it, so that the flue interface 1 and the heat exchange component interface 2 are connected through the flue. On this basis, the outer cloth 4 surrounding the outer periphery of the inner cloth 3 can form a cavity between the inner cloth 3.
[0028] The high temperature heat protection coating 8 is injected into the cavity and can be cured in the cavity. It should be noted that before the high temperature heat protection coating 8 is injected, since the main part of the soft connection structure is only the high temperature resistant cloth, the high temperature resistant cloth can be adaptively adjusted according to the position of the flue interface 1 and the heat exchanger interface 2, so that the two ends of the high temperature resistant cloth can correspond to the flue interface 1 and the heat exchanger interface 2 respectively, and fixed by the support frame 5. After the high temperature resistant cloth is fixed, the high temperature heat protection coating 8 can be injected into the cavity and fixed, thereby forming a soft connection structure with stable shape.
[0029] It should be noted that the support frame 5 is located at both ends of the high temperature resistant cloth, so that the two ends of the high temperature resistant cloth can be stably connected to the flue interface 1 and the heat exchange component interface 2 respectively. In order to make the inner layer cloth 3 and the outer layer cloth 4 have a cavity structure, it is necessary to fix the inner layer cloth 3 and the outer layer cloth 4 at two different positions of the support frame 5, so that a certain gap is left between the outer layer cloth 4 and the inner layer cloth 3 to form a cavity.
[0030] The two support frames 5 can be connected to the flue interface 1 and the heat exchanger interface 2 by flanges or the like, thereby forming a stable soft connection structure. It should be noted that in order to improve the sealing performance of the soft connection structure with the flue interface 1 and the heat exchanger interface 2, a high temperature resistant sealing ring can be added at the connection between the support frame 5 and the flue interface 1 and the heat exchanger interface 2 to ensure that hot smoke does not overflow from the connection.
[0031] In summary of the above embodiments, the soft connection structure of the present application utilizes the soft material of the high temperature resistant cloth to achieve eccentric stable and accurate connection of the flue interface 1 and the heat exchanger interface 2. The high temperature resistant cloth includes an inner cloth 3 and an outer cloth 4, with a cavity between the inner cloth 3 and the outer cloth 4, and the inner cloth 3 is arranged in an annular manner to form a flue inside it for high temperature hot smoke to pass through. The high temperature thermal protective coating 8 is injected into the cavity, and after the high temperature resistant cloth is softly connected to the flue interface 1 and the heat exchanger interface 2, the high temperature thermal protective coating 8 is cured in the cavity, thereby forming a stable connection structure. A support frame 5 is provided at both ends of the high temperature resistant cloth, one side of the support frame 5 is connected to the inner cloth 3 and the outer cloth 4, and the other side is connected to the flue interface 1 or the heat exchanger interface 2, thereby forming a stable soft connection structure. The present application utilizes the flexibility of the high-temperature resistant cloth to achieve staggered connection of the unequal flue interface 1 and the heat exchange component interface 2, ensuring the connection effect of the two interfaces and ensuring stable and accurate docking. The cured high-temperature thermal protective coating 8 can prevent high-temperature hot smoke from overflowing from the connection and ensure that the soft connection structure has a better stability effect.
[0032] In addition, since the flue interface 1 and the heat exchanger interface 2 are usually annular structures, the inner cloth 3 and the outer cloth 4 of the present application are both arranged in an annular shape to adapt to the annular structure of the interface, and an annular cavity will be formed between the inner cloth 3 and the outer cloth 4. Of course, there are also square interfaces or interfaces of other shapes, and the setting shapes of the inner cloth 3 and the outer cloth 4 can be adjusted according to the shape of the interface, so that the inner cloth 3 and the outer cloth 4 can roughly match the shape of the interface. Similarly, for different interface shapes, the contour of the support frame 5 can also be adaptively adjusted to ensure that the high temperature resistant cloth is stably connected to the flue interface 1 and the heat exchanger interface 2, and does not affect the circulation of hot smoke in the flue.
[0033] This application is introduced by taking the flue interface 1 and the heat exchanger interface 2 as an annular structure as an example. On this basis, the support frame 5 is an annular support frame 5, that is, the outer ring of the annular support frame 5 is set in a circular shape, and the inner ring of the annular support frame 5 is provided with a central opening, which is also circular. Each annular support frame 5 is used to connect the inner layer cloth 3 and the outer layer cloth 4 at the same end, so as to form an annular cavity with both ends closed, so as to prevent the high-temperature thermal protection coating 8 from overflowing from both ends of the cavity when it is injected.
[0034] It is pointed out above that the inner circle of the annular support frame 5 has a circular opening, so the two annular support frames 5 can be connected to the flue interface 1 and the flue, and the flue and the heat exchange component interface 2 respectively.
[0035] In addition, in order to prevent the annular support frame 5 from causing turbulence to the hot smoke in the flue and affecting the conveying efficiency, the inner ring of the annular support frame 5 is fixedly connected to the inner layer cloth 3, and the inner ring of the annular support frame 5 is coaxially arranged with the flue interface 1, and the inner diameters of the two are the same, so that the hot smoke can smoothly transition from the flue interface 1 to the flue, preventing the airflow from swirling due to high wind speed. Similarly, the inner ring of another support frame 5 is coaxially arranged with the heat exchanger interface 2, and the inner diameters of the two are the same, so that the hot smoke can smoothly transition from the flue to the heat exchanger interface 2, preventing the airflow from swirling and improving the conveying efficiency.
[0036] Please refer to Figure 1. The outer ring of the annular support frame 5 of the present application is provided with a raised ring 7 extending toward the cavity square. One raised ring 7 is coaxially arranged with the flue interface 1, and the two have the same outer diameter; the other raised ring 7 is coaxially arranged with the heat exchanger interface 2, and the two have the same outer diameter. On this basis, an angle steel flange 6 can be arranged on the outer periphery of the raised ring 7. The number of angle steel flanges 6 at each connection is two, and the two angle steel flanges 6 are arranged back to back. Here, the connection at the flue interface 1 is taken as an example. The two angle steel flanges 6 can cover the flue interface 1 and the raised ring 7, so that the two angle steel flanges 6 are fixed by bolts respectively, and the two fixed angle steel flanges 6 are connected to the flue interface 1 and the raised ring 7 respectively by bolts, so as to form a stable connection structure. It should be pointed out that in order to further improve the sealing of the connection, a high temperature resistant sealing ring can also be added between the angle steel flange 6 and the flue interface 1 and the raised ring 7. Similarly, the heat exchanger interface 2 and the raised ring 7 can also be fixedly connected in the above manner, which will not be repeated here.
[0037] After the annular support frame 5 is fixed, in order to improve the setting stability of the annular support frame 5, the side of the annular support frame 5 facing away from the cavity is attached to the end surface of the flue interface 1 or the heat exchanger interface 2 and sealed and fixed, so that the end surface of the flue interface 1 and the heat exchanger interface 2 can provide certain support for the annular support frame 5, and reduce the gap between the two as much as possible to improve the sealing performance. Similarly, a high temperature resistant sealing ring can also be added between the annular support frame 5 and the end surface of the flue interface 1 and the heat exchanger interface 2, which will not be repeated here.
[0038] It should be pointed out that the angle steel flange 6 used above has the advantages of good fixing effect and easy disassembly and assembly. If the advantages of easy disassembly and assembly are not considered, welding and other methods can also be used for fixing to ensure that the two support frames 5 can be fixedly connected to the flue interface 1 and the heat exchange component interface 2 respectively. No more restrictions will be made here.
[0039] As for the above-mentioned high temperature resistant cloth, ceramic fiber cloth is preferred here, which has excellent high temperature strength, corrosion resistance to acid, oil, and water vapor, and excellent thermal insulation performance. The high temperature thermal protective coating 8 can be made of aluminum silicate coating made of aluminum oxide and silicon dioxide, which has good anti-cracking performance, no cracks in high-position long-term use, and also has excellent anti-ablation performance and anti-alkali chemical erosion performance. Please refer to the prior art for details, which will not be repeated here.
[0040] It should be noted that, for the method of fixing the inner layer cloth 3 and the outer layer cloth 4 to the support frame 5, ceramic fiber yarn can be used to fix them on the support frame 5, that is, a plurality of weaving holes are opened at corresponding positions on the support frame 5, and the inner layer cloth 3 and the outer layer cloth 4 are sewn to the support frame 5 by ceramic fiber yarn. Ceramic fiber yarn also has excellent high temperature strength and thermal insulation properties.
[0041] In addition, since the angle steel flange 6 is used, the outer layer cloth 4 can also be crimped between the angle steel flange 6 and the raised ring 7 and then tightened and fixed by bolts, which also has high stability.
[0042] Since high-temperature thermal protective coating 8 needs to be injected into the cavity, an injection port 9 for injecting high-temperature thermal protective coating 8 is opened on the outer layer of cloth 4, and an exhaust port 10 is opened at another position of the outer layer of cloth 4 to facilitate the discharge of air inside the cavity and make the injection of high-temperature thermal protective coating 8 smoother.
[0043] It should be pointed out that since the cured high-temperature heat protection coating 8 has a certain sealing performance, it can prevent the hot smoke from overflowing, but it cannot completely guarantee that the hot smoke will not overflow to the outside of the soft connection structure through some gaps inside the high-temperature heat protection coating 8. Here, the outer layer of the outer cloth 4 is covered with aluminum, and the aluminum is provided with avoidance holes corresponding to the injection port 9 and the exhaust port 10. At the same time, the aluminum can also play a protective role to prevent the outer layer of the cloth 4 from being damaged by collision with external objects.
[0044] It should be noted that, in this specification, relational terms such as first and second are merely used to distinguish one entity from other entities, but do not necessarily require or imply any actual relationship or order between these entities.
[0045] Specific examples are used herein to illustrate the principles and implementation methods of the present application, and the description of the above embodiments is only used to help understand the method and core ideas of the present application. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the scope of protection of the claims of the present application.
Claims
1. A high-temperature furnace flue butt joint soft connection structure, used to connect the flue interface and the heat exchange component interface, characterized in that: include: The high temperature resistant cloth comprises an inner cloth and an outer cloth located at the periphery of the inner cloth, a cavity is provided between the inner cloth and the outer cloth, and the inner cloth surrounds to form a flue; A high temperature heat protection coating is injected into the cavity and cured in the cavity; The support frames are located at both ends of the high temperature resistant cloth, and are used to connect the inner layer cloth and the outer layer cloth. The two support frames are respectively connected to the flue interface and the heat exchange component interface.
2. The high temperature furnace flue butt joint flexible connection structure according to claim 1, characterized in that: The inner layer cloth and the outer layer cloth are both arranged in an annular shape to form an annular cavity between the inner layer cloth and the outer layer cloth.
3. The high temperature furnace flue butt joint flexible connection structure according to claim 1, characterized in that: The support frame is an annular support frame, and each of the annular support frames is used to connect the inner layer of cloth and the outer layer of cloth at the same end to form an annular cavity closed at both ends. The middle opening of one annular support frame is used to connect the flue interface and the flue, and the middle opening of another annular support frame is used to connect the flue and the heat exchange component interface.
4. The high temperature furnace flue butt joint flexible connection structure according to claim 3, characterized in that: The inner ring of the annular support frame is fixedly connected to the inner layer of cloth, the inner ring of one annular support frame is coaxially arranged with the flue interface, and the inner diameters of the two are the same; the inner ring of the other annular support frame is coaxially arranged with the heat exchange component interface, and the inner diameters of the two are the same.
5. The high temperature furnace flue butt joint flexible connection structure according to claim 4, characterized in that: The outer ring of the annular support frame is provided with a raised ring extending toward the cavity, one of the raised rings is coaxially arranged with the flue interface, and the two have the same outer diameter; the other raised ring is coaxially arranged with the heat exchange component interface, and the two have the same outer diameter.
6. The high temperature furnace flue butt joint flexible connection structure according to claim 4, characterized in that: The side of the annular support frame facing away from the cavity is attached to and sealed and fixed to the end surface of the flue interface or the heat exchange component interface.
7. The high temperature furnace flue butt joint flexible connection structure according to claim 5, characterized in that: An angle steel flange for connecting the flue interface or the heat exchange component interface is arranged on the outer periphery of the raised ring, and the outer layer of cloth is fixed to the raised ring through the angle steel flange and bolts.
8. The high temperature furnace flue butt joint flexible connection structure according to any one of claims 1 to 7, characterized in that: The high temperature resistant cloth is a ceramic fiber cloth, and the high temperature resistant cloth is fixed on the support frame through ceramic fiber yarns.
9. The high temperature furnace flue butt joint flexible connection structure according to claim 8, characterized in that: The outer layer of cloth is provided with an injection port for injecting the high-temperature heat protection coating and an exhaust port for exhausting the air inside the cavity.
10. The high temperature furnace flue butt joint flexible connection structure according to claim 9, characterized in that: The outer circumference of the outer layer of cloth is covered with an aluminum skin, and the aluminum skin is provided with avoidance holes corresponding to the injection port and the exhaust port.