Horizontal organic heat carrier furnace rear cover sealing structure
Patent Information
- Application Number
- CN202522578253.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-04
- Publication Date
- 2026-10-30
- Estimated Expiration
- 2035-12-04
AI Technical Summary
[0003]然而，这种卧式有机热载体炉后盖密封结构在实际使用过程中存在以下两个方面的缺点：一方面，由于壳体后部的耐火棉在长时间使用后容易被高温烟气吹离脱落，导致密封失效，从而引发烟气泄漏；另一方面，壳体后部直接暴露于高温烟气中，缺乏有效的隔热保护，在长时间高温烟气冲刷下容易过热、变形甚至烧穿，严重影响设备的安全与运行
本实用新型设置第一后盖筒节和第二后盖筒节、后盖环板、炉管包圈、第一壳体环板和第二壳体环板、壳体短节；第二后盖筒节水平布置，且第二后盖筒节后端与后盖面板满焊固定连接，后盖环板竖直布置，且后盖环板外端与第二后盖筒节前端满焊固定连接，第一后盖筒节水平布置，且第一后盖筒节后端与后盖环板内端满焊固定连接，在由第一后盖筒节、后盖环板、第二后盖筒节与后盖面板围成的空间内填充有第一密封填料；炉管包圈包覆在外圈炉管后部外侧管壁上且与外圈炉管满焊固定连接，第一壳体环板竖直布置，且第一壳体环板内端与炉管包圈满焊固定连接，第二壳体环板竖直布置，且第二壳体环板内端后壁面与第一壳体环板外端前壁面相贴合，第二壳体环板内端与壳体后端满焊固定连接，第一壳体环板外端与壳体后端及第二壳体环板内端满焊固定连接，壳体短节水平布置且位于壳体与后盖面板之间，壳体短节前端与第二壳体环板外端满焊固定连接，在壳体短节内壁面上设有圆筒形的第二密封填料，第二密封填料及壳体短节与第一密封填料、第一后盖筒节、后盖环板及第二后盖筒节之间为迷宫式密封结构。本实用新型优选第一密封填料由从前至后依次布置的第一耐火浇注料层和第一密封隔热层构成，第二密封填料由从前至后依次布置的第二密封隔热层和第二耐火浇注料层构成。这样的结构，一方面，本实用新型第二密封填料及壳体短节与第一密封填料、第一后盖筒节、后盖环板及第二后盖筒节之间为迷宫式密封结构，使得后盖密封性能良好，烟气不易泄露，本实用新型优选在迷宫式密封面之间的间隙内即第二台阶面与第一台阶面之间的间隙内设置密封垫，密封垫在这个间隙内压紧，长时间使用后不易吹离脱落，使得后盖密封性能更好，进一步提高了后盖密封性能，确保高温烟气不会窜到壳体外；另一方面，本实用新型在壳体短节内壁面上设置圆筒形的第二密封填料，第二密封填料对壳体短节起高效隔热保护作用，防止壳体短节即壳体后部在长时间高温烟气冲刷下变形、烧穿，也降低了外部结构的温度，保障了设备长期稳定运行。
Smart Images
Figure CN224919795U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to an organic heat carrier furnace for industrial heat exchange, and in particular to a sealing structure for the rear cover of a horizontal organic heat carrier furnace, belonging to the field of industrial boiler technology. Background Technology
[0002] Horizontal organic heat carrier furnaces are widely used in industrial heating systems. Existing horizontal organic heat carrier furnaces include a cylindrical, horizontally arranged shell, inner and outer ring furnace tubes installed sequentially from the inside to the outside of the shell cavity, and a disc-shaped rear cover panel installed on the rear side of the shell. The outer wall of the shell is covered with an external insulation layer, while the inner rear wall is covered with refractory cotton. The rear cover panel is sealed by directly pressing the refractory cotton.
[0003] However, this type of horizontal organic heat carrier furnace rear cover sealing structure has the following two disadvantages in actual use: First, the refractory cotton at the rear of the shell is easily blown off by high-temperature flue gas after long-term use, resulting in seal failure and flue gas leakage; Second, the rear of the shell is directly exposed to high-temperature flue gas and lacks effective heat insulation protection. Under the long-term scouring of high-temperature flue gas, it is prone to overheating, deformation or even burn-through, which seriously affects the safety and operation of the equipment. Summary of the Invention
[0004] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a sealing structure for the rear cover of a horizontal organic heat carrier furnace with good sealing performance, good flue gas leakage, and stable operation for a long time.
[0005] To solve the above-mentioned technical problems, this utility model adopts a horizontal organic heat carrier furnace rear cover sealing structure, including a cylindrical horizontally arranged shell, an inner ring furnace tube and an outer ring furnace tube installed sequentially from the inside to the outside of the shell cavity, and a disc-shaped rear cover panel installed on the rear side of the shell; an outer insulation layer is covered on the outer wall of the shell, and it also includes a cylindrical first rear cover section and a second rear cover section, an annular rear cover ring plate, a cylindrical furnace tube ring, an annular first shell ring plate and a second shell ring plate, and a cylindrical shell short section; the second rear cover section is horizontally arranged, and its rear end is fully welded and fixedly connected to the rear cover panel; the rear cover ring plate is vertically arranged, and its outer end is fully welded and fixedly connected to the front end of the second rear cover section; the first rear cover section is horizontally arranged, and its rear end is fully welded and fixedly connected to the inner end of the rear cover ring plate; the first rear cover section, the rear cover ring plate, the second rear cover section, and the rear cover panel are connected together. The space enclosed by the plate is filled with a first sealing filler; the furnace tube ring covers the outer wall of the rear part of the outer ring furnace tube and is fully welded and fixedly connected to the outer ring furnace tube; the first shell ring plate is arranged vertically, and the inner end of the first shell ring plate is fully welded and fixedly connected to the furnace tube ring; the second shell ring plate is arranged vertically, and the rear wall surface of the inner end of the second shell ring plate is in contact with the front wall surface of the outer end of the first shell ring plate; the inner end of the second shell ring plate is fully welded and fixedly connected to the rear end of the shell; the outer end of the first shell ring plate is fully welded and fixedly connected to the rear end of the shell and the inner end of the second shell ring plate; the shell short section is arranged horizontally and located between the shell and the rear cover panel; the front end of the shell short section is fully welded and fixedly connected to the outer end of the second shell ring plate; a cylindrical second sealing filler is provided on the inner wall surface of the shell short section; the second sealing filler and the shell short section form a labyrinth seal structure with the first sealing filler, the first rear cover cylindrical section, the rear cover ring plate and the second rear cover cylindrical section.
[0006] In a preferred embodiment of this utility model, the first sealing filler is composed of a first refractory castable layer and a first sealing and heat insulation layer arranged sequentially from front to back, and the second sealing filler is composed of a second sealing and heat insulation layer and a second refractory castable layer arranged sequentially from front to back. The second sealing and heat insulation layer is disposed within the annular space formed by the furnace tube ring, the first shell ring plate, the second shell ring plate, and the shell short section. The first sealing filler, the first rear cover cylinder, the rear cover ring plate, and the second rear cover cylinder have a concave first step surface, and the second refractory castable layer and the shell short section have a convex second step surface. The second step surface and the first step surface are opposite to each other and spaced apart, and a sealing gasket is provided in the gap between the second step surface and the first step surface.
[0007] In a preferred embodiment of this utility model, a plurality of foot nails are fixedly installed on the inner wall of the shell section, and the foot nails are located inside the second refractory castable layer; the gap between the second step surface and the first step surface is 2-3 cm; the first refractory castable layer and the second refractory castable layer are made of high alumina castable, and the first sealing and heat insulation layer, the second sealing and heat insulation layer and the sealing gasket are made of aluminum silicate cotton.
[0008] In a preferred embodiment of the present invention, a manhole for maintenance is provided on the rear cover panel and the first sealing filler, and a cover plate for closing the manhole is provided.
[0009] In a preferred embodiment of this utility model, a cylindrical outer shell plate made of metal is wrapped around the outer wall of the outer insulation layer, and a flange is fixedly installed at the rear end of the outer shell plate. The rear cover panel is fixedly connected to the outer shell plate through the flange. The horizontal organic heat carrier furnace is provided with an oil outlet manifold, and the outlet end of the outer ring furnace tube is connected to the oil outlet manifold through a pipe passing through the shell short section.
[0010] By adopting the above structure, this utility model has the following beneficial effects: This utility model comprises a first rear cover cylindrical section and a second rear cover cylindrical section, a rear cover ring plate, a furnace tube shroud, a first shell ring plate and a second shell ring plate, and a shell short section. The second rear cover cylindrical section is horizontally arranged, and its rear end is fully welded and fixedly connected to the rear cover panel. The rear cover ring plate is vertically arranged, and its outer end is fully welded and fixedly connected to the front end of the second rear cover cylindrical section. The first rear cover cylindrical section is horizontally arranged, and its rear end is fully welded and fixedly connected to the inner end of the rear cover ring plate. A first sealing filler is filled in the space enclosed by the first rear cover cylindrical section, the rear cover ring plate, the second rear cover cylindrical section, and the rear cover panel. The furnace tube shroud covers the outer wall of the rear part of the outer ring furnace tube and is fully welded and fixedly connected to the outer ring furnace tube. The first shell ring plate... The first shell ring plate is vertically arranged, with its inner end fully welded and fixedly connected to the furnace tube circumference. The second shell ring plate is also vertically arranged, with its inner rear wall surface fitting against the outer front wall surface of the first shell ring plate. The inner end of the second shell ring plate is fully welded and fixedly connected to the rear end of the shell, and the outer end of the first shell ring plate is fully welded and fixedly connected to both the rear end of the shell and the inner end of the second shell ring plate. A shell short section is horizontally arranged between the shell and the rear cover panel, with its front end fully welded and fixedly connected to the outer end of the second shell ring plate. A cylindrical second sealing packing is provided on the inner wall surface of the shell short section. The second sealing packing and the shell short section form a labyrinthine sealing structure with respect to the first sealing packing, the first rear cover section, the rear cover ring plate, and the second rear cover section. Preferably, the first sealing packing consists of a first refractory castable layer and a first sealing and heat insulation layer arranged sequentially from front to back, and the second sealing packing consists of a second sealing and heat insulation layer and a second refractory castable layer arranged sequentially from front to back. This structure has two advantages. First, the second sealing packing and the short section of the shell are connected to the first sealing packing, the first rear cover cylinder, the rear cover ring plate, and the second rear cover cylinder in a labyrinthine sealing structure. This ensures good sealing performance of the rear cover and prevents flue gas leakage. Preferably, a sealing gasket is placed in the gap between the labyrinthine sealing surfaces, i.e., the gap between the second step surface and the first step surface. The sealing gasket is pressed tightly in this gap and is not easily blown off after long-term use, which further improves the sealing performance of the rear cover and ensures that high-temperature flue gas does not escape to the outside of the shell. Second, a cylindrical second sealing packing is provided on the inner wall of the short section of the shell. The second sealing packing provides efficient heat insulation protection for the short section of the shell, preventing the short section of the shell, i.e., the rear part of the shell, from deforming and burning through under the long-term scouring of high-temperature flue gas. It also reduces the temperature of the external structure and ensures long-term stable operation of the equipment.
[0011] This utility model provides a manhole for maintenance and a cover plate for sealing the manhole on the rear cover panel and the first sealing packing. This structure facilitates the inspection and maintenance of the interior of the horizontal organic heat carrier furnace and improves the maintainability of the equipment.
[0012] This utility model has an outer shell panel covering the outer wall of the outer insulation layer, and a flange is fixedly installed at the rear end of the outer shell panel. The rear cover panel is fixedly connected to the outer shell panel through the flange. In this way, the rear cover panel is not only easy to disassemble and assemble, but also more secure and reliable to install.
[0013] This utility model has a simple structure, is easy to maintain, has low manufacturing cost, and good sealing performance, ensuring long-term stable operation of the equipment. Attached Figure Description
[0014] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings.
[0015] Figure 1 This is a schematic diagram of a sealing structure for the rear cover of a horizontal organic heat carrier furnace according to this utility model.
[0016] Figure 2 for Figure 1 A magnified schematic diagram of the structure at point A in the middle.
[0017] Figure 3 This is a partial structural schematic diagram of the horizontal organic heat carrier furnace of this utility model, with the rear cover panel not shown.
[0018] Figure 4 This is a schematic diagram of an installation structure of the rear cover panel and the first sealing filler in this utility model. Detailed Implementation
[0019] See Figures 1 to 4The diagram illustrates a horizontal organic heat carrier furnace rear cover sealing structure, comprising a cylindrical, horizontally arranged shell 1, spiral inner ring furnace tubes 2 and outer ring furnace tubes 3 sequentially installed from the inside out within the shell 1, and a disc-shaped rear cover panel 4 installed on the rear side of the shell 1. The shell 1 is made of carbon steel plate, and the rear cover panel 4 is made of stainless steel plate or carbon steel plate. An external insulation layer 5 is covered on the outer wall of the shell 1, typically using insulation cotton such as aluminum silicate refractory fiber cotton. The structure also includes a cylindrical first rear cover section 6 and a second rear cover section 7, an annular rear cover ring plate 8, and a circular... The furnace tube surround 9, the first and second shell ring plates 10 and 11, and the cylindrical shell short section 12 are all made of carbon steel plate. The first rear cover section 6, the second rear cover section 7, the rear cover ring plate 8, the furnace tube surround 9, the first shell ring plate 10, the second shell ring plate 11, and the shell short section 12 are all made of carbon steel plate. The second rear cover section 7 is horizontally arranged, and its rear end is fully welded to the rear cover panel 4. The rear cover ring plate 8 is vertically arranged, and its outer end is fully welded to the front end of the second rear cover section 7. The first rear cover section 6 is horizontally arranged, and the first rear cover... The rear end of the cylindrical section 6 is fully welded and fixedly connected to the inner end of the rear cover ring plate 8. A first sealing filler is filled in the space enclosed by the first rear cover cylindrical section 6, the rear cover ring plate 8, the second rear cover cylindrical section 7, and the rear cover panel 4. The furnace tube shroud 9 covers the outer rear wall of the outer ring furnace tube 3 and is fully welded and fixedly connected to the outer ring furnace tube 3. The first shell ring plate 10 is vertically arranged, and its inner end is fully welded and fixedly connected to the furnace tube shroud 9. The second shell ring plate 11 is vertically arranged, and its inner rear wall surface is in contact with the outer front wall surface of the first shell ring plate 10. The inner end of the ring plate 11 is fully welded and fixedly connected to the rear end of the housing 1. The outer end of the first housing ring plate 10 is fully welded and fixedly connected to the rear end of the housing 1 and the inner end of the second housing ring plate 11. The housing short section 12 is arranged horizontally and located between the housing 1 and the rear cover panel 4. The front end of the housing short section 12 is fully welded and fixedly connected to the outer end of the second housing ring plate 11. A cylindrical second sealing packing is fixedly provided on the inner wall surface of the housing short section 12. The second sealing packing and the housing short section 12 form a labyrinth sealing structure with the first sealing packing, the first rear cover cylindrical section 6, the rear cover ring plate 8, and the second rear cover cylindrical section 7.
[0020] As a preferred embodiment of this utility model, such as Figures 1 to 4As shown, the first sealing filler consists of a first refractory castable layer 13 and a first sealing and heat insulation layer 14 arranged sequentially from front to back. The second sealing filler consists of a second sealing and heat insulation layer 15 and a second refractory castable layer 16 arranged sequentially from front to back. The second sealing and heat insulation layer 15 is disposed within the annular space formed by the furnace tube ring 9, the first shell ring plate 10, the second shell ring plate 11, and the shell short section 12. The first sealing filler, the first rear cover cylinder 6, the rear cover ring plate 8, and the second rear cover cylinder 7 have a concave first step surface 17. The second refractory castable layer 16 and the shell short section 12 have a convex second step surface 18. The second step surface 18 is opposite to and spaced apart from the first step surface 17. A sealing gasket 19 is provided in the gap between the second step surface 18 and the first step surface 17.
[0021] As a preferred embodiment of this utility model, such as Figure 1 , 2 As shown in Figure 3, a plurality of foot nails 12a are fixedly installed on the inner wall surface of the shell section 12, and the foot nails 12a are located inside the second refractory castable layer 16; the gap between the second step surface 18 and the first step surface 17 is 2-3 cm; the first refractory castable layer 13 and the second refractory castable layer 16 are made of high alumina castable, and the first sealing and heat insulation layer 14, the second sealing and heat insulation layer 15 and the sealing gasket 19 are made of aluminum silicate cotton.
[0022] As a preferred embodiment of this utility model, such as Figure 1 , 4 As shown, a manhole 20 for maintenance is provided on the rear cover panel 4 and the first sealing filler, and a cover plate 21 for sealing the manhole 20 is provided. The cover plate 21 is made of carbon steel plate, and the cover plate 21 is usually fixedly connected to the flange provided at the manhole 20 by bolts and sealing rings. Preferably, this utility model also provides a high-alumina refractory castable layer and an aluminum silicate cotton sealing and heat insulation layer arranged sequentially from front to back inside the cover plate 21.
[0023] As a preferred embodiment of this utility model, such as Figure 1 , 2 As shown in Figure 3, a cylindrical outer shell plate 22 made of metal is wrapped around the outer wall of the outer insulation layer 5. The outer shell plate 22 is made of carbon steel plate. A flange 23 is welded and fixedly installed at the rear end of the outer shell plate 22. The rear cover panel 4 is fixedly connected to the outer shell plate 22 through the flange 23 and the sealing ring. Preferably, insulation cotton such as aluminum silicate refractory fiber cotton is also provided between the shell section 12 and the outer shell plate 22. The horizontal organic heat carrier furnace is provided with an oil outlet manifold 24. The outlet end of the outer ring furnace tube 3 is connected to the oil outlet manifold 24 through a pipe 25 passing through the shell section 12.
[0024] After trial use, this utility model has been found to have good sealing performance, eliminating smoke leakage and shell deformation. Its simple structure ensures long-term stable operation of the equipment and has achieved good practical results.
Claims
1. A sealing structure for the rear cover of a horizontal organic heat carrier furnace, comprising a cylindrical horizontally arranged shell (1), an inner ring furnace tube (2) and an outer ring furnace tube (3) sequentially installed from the inside to the outside of the shell (1), and a disc-shaped rear cover panel (4) installed on the rear side of the shell (1); an outer insulation layer (5) is provided on the outer wall of the shell (1), characterized in that: It also includes a cylindrical first rear cover section (6) and a second rear cover section (7), an annular rear cover ring plate (8), a cylindrical furnace tube ring (9), an annular first shell ring plate (10) and a second shell ring plate (11), and a cylindrical shell short section (12); the second rear cover section (7) is arranged horizontally, and the rear end of the second rear cover section (7) is fully welded to the rear cover panel (4); the rear cover ring plate (8) is arranged vertically, and the outer end of the rear cover ring plate (8) is connected to the second rear cover. The front end of the cylindrical section (7) is fully welded and fixedly connected. The first rear cover cylindrical section (6) is arranged horizontally, and the rear end of the first rear cover cylindrical section (6) is fully welded and fixedly connected to the inner end of the rear cover ring plate (8). The space enclosed by the first rear cover cylindrical section (6), the rear cover ring plate (8), the second rear cover cylindrical section (7), and the rear cover panel (4) is filled with a first sealing filler. The furnace tube ring (9) covers the outer wall of the rear part of the outer ring furnace tube (3) and is fully welded and fixedly connected to the outer ring furnace tube (3). The first shell The ring plate (10) is arranged vertically, and the inner end of the first shell ring plate (10) is fully welded and fixedly connected to the furnace tube ring (9). The second shell ring plate (11) is arranged vertically, and the rear wall surface of the inner end of the second shell ring plate (11) is in contact with the front wall surface of the outer end of the first shell ring plate (10). The inner end of the second shell ring plate (11) is fully welded and fixedly connected to the rear end of the shell (1). The outer end of the first shell ring plate (10) is fully welded to the rear end of the shell (1) and the inner end of the second shell ring plate (11). The housing section (12) is horizontally arranged and located between the housing (1) and the rear cover panel (4). The front end of the housing section (12) is fully welded to the outer end of the second housing ring plate (11). A cylindrical second sealing packing is provided on the inner wall surface of the housing section (12). The second sealing packing and the housing section (12) are connected to the first sealing packing, the first rear cover section (6), the rear cover ring plate (8) and the second rear cover section (7) in a labyrinth sealing structure.
2. The sealing structure of the rear cover of the horizontal organic heat carrier furnace according to claim 1, characterized in that: The first sealing filler is composed of a first refractory castable layer (13) and a first sealing heat insulation layer (14) arranged sequentially from front to back. The second sealing filler is composed of a second sealing heat insulation layer (15) and a second refractory castable layer (16) arranged sequentially from front to back. The second sealing heat insulation layer (15) is set in the annular space formed by the furnace tube ring (9), the first shell ring plate (10), the second shell ring plate (11) and the shell short section (12). The first sealing filler, the first rear cover cylinder (6), the rear cover ring plate (8) and the second rear cover cylinder (7) have a concave first step surface (17). The second refractory castable layer (16) and the shell short section (12) have a convex second step surface (18). The second step surface (18) and the first step surface (17) are opposite to each other and spaced apart. A sealing gasket (19) is provided in the gap between the second step surface (18) and the first step surface (17).
3. The sealing structure of the rear cover of the horizontal organic heat carrier furnace according to claim 2, characterized in that: A number of foot nails (12a) are fixedly installed on the inner wall of the shell section (12), and the foot nails (12a) are located inside the second refractory castable layer (16); the gap between the second step surface (18) and the first step surface (17) is 2-3cm; the first refractory castable layer (13) and the second refractory castable layer (16) are made of high alumina castable, and the first sealing and heat insulation layer (14), the second sealing and heat insulation layer (15) and the sealing gasket (19) are made of aluminum silicate cotton.
4. The sealing structure of the rear cover of the horizontal organic heat carrier furnace according to claim 1, characterized in that: A manhole (20) for maintenance is provided on the rear cover panel (4) and the first sealing packing, and a cover plate (21) for closing the manhole (20) is provided.
5. The sealing structure of the rear cover of the horizontal organic heat carrier furnace according to any one of claims 1 to 4, characterized in that: A cylindrical metal outer shell plate (22) is wrapped around the outer wall of the outer insulation layer (5). A flange (23) is fixedly installed at the rear end of the outer shell plate (22). The rear cover panel (4) is fixedly connected to the outer shell plate (22) through the flange (23). The horizontal organic heat carrier furnace is equipped with an oil outlet manifold (24). The outlet end of the outer ring furnace tube (3) is connected to the oil outlet manifold (24) through a pipe (25) passing through the shell short section (12).