Installation structure of furnace duct and installation method thereof
By setting inner, middle, and outer ring guide tubes in the blast furnace, combined with cover plates and triangular support structures, the problem of uneven baking of the hearth sidewalls caused by excessively low cover plates was solved, achieving uniform baking inside the blast furnace and extending its service life.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- RIZHAO STEEL HLDG GROUP
- Filing Date
- 2023-11-18
- Publication Date
- 2026-07-28
AI Technical Summary
In existing technologies, a cover plate that is too low leads to uneven and incomplete baking of the blast furnace hearth sidewalls, affecting the blast furnace's service life.
The inner ring guide tube, middle ring guide tube, and outer ring guide tube are evenly distributed in a ring shape. A 600mm gap is left between the cover plate and the inner wall of the furnace. The guide tube is fixed with triangular supports and gaskets, and connected with bolts and channel steel. Temperature sensors are set up for monitoring and fixing the ring stabilizing guide tube.
It achieves uniform baking inside the furnace, extends the furnace life, reduces installation risks, and improves furnace baking efficiency and safety.
Smart Images
Figure CN117568542B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the technical field of oven duct installation structure, specifically to an oven duct installation structure and its installation method. Background Technology
[0002] The blast furnace drying guide pipe is an important device for preheating the furnace and baking and dehumidifying refractory carbon bricks and castables before the blast furnace is put into operation. It is also an important method for high-temperature shaping of the furnace cooling wall, refractory carbon bricks and castables before the blast furnace is put into operation.
[0003] For example, Chinese patent CN112981026B discloses a method for arranging hot blast ducts for blast furnace drying. It takes into account the changing characteristics of the heat flow field during the blast furnace drying process, and provides a clear method to determine the number of hot blast duct rings and the distribution principle of hot blast ducts on each ring. In this way, hot blast ducts are reasonably arranged on the cross section of the blast furnace hearth to achieve uniform heating of the hearth brick lining during the drying process.
[0004] In the above scheme, the hot air ducts are distributed in four rings. In actual use, a cover plate needs to be installed at the bottom of the furnace to allow the hot air to rise along the furnace wall. However, this can easily lead to uneven distribution of the ducts in the outer two rings, resulting in the following disadvantages: uneven heating of the hearth refractory and carbon bricks, uneven dehumidification of carbon bricks and uneven strength of the refractory after drying, and uneven and incomplete baking of the hearth sidewalls due to the cover plate being too low, which directly affects the service life of the blast furnace. Summary of the Invention
[0005] The purpose of this invention is to provide an installation structure and method for the furnace drying guide tube, so as to solve the problem that the uneven and incomplete baking of the hearth sidewall caused by the cover plate being too low, which directly affects the service life of the blast furnace.
[0006] To achieve the above-mentioned objectives, the present invention adopts the following technical solution: an installation structure for an oven guide tube, comprising an oven body, wherein a plurality of outer ring guide tubes are arranged inside the oven body, the plurality of outer ring guide tubes being evenly distributed in a ring shape, a plurality of middle ring guide tubes are arranged inside the ring formed by the plurality of outer ring guide tubes, the plurality of middle ring guide tubes being evenly distributed in a ring shape, a plurality of inner ring guide tubes are arranged inside the ring formed by the plurality of middle ring guide tubes, the inner ring guide tubes being evenly distributed in a ring shape, a cover plate is provided above the oven body, the bottom surface of the cover plate is in contact with the outer wall surfaces of the inner ring guide tubes, the middle ring guide tubes and the outer ring guide tubes, a 600mm gap is left between the cover plate and the inner wall of the oven body, and the thickness of the cover plate is 3mm.
[0007] Preferably, the bottom ends of the inner ring conduit, the middle ring conduit, and the outer ring conduit are all fixed with triangular supports, the bottom surface of the triangular supports is fixed with a gasket, the bottom surface of the gasket is fixed with a fixing block, and the bottom surface of the fixing block is fixed to the inner bottom surface of the furnace body.
[0008] Preferably, the top surface of the cover plate is provided with a channel steel, and mounting blocks are fixedly distributed on both sides of the channel steel. The top surface of the mounting blocks is provided with a connecting hole, and the top surface of the cover plate is provided with a plurality of threaded holes. The connecting holes communicate with the threaded holes, and a bolt is rotatably installed inside the connecting hole. The bottom end of the bolt passes through the connecting hole and is threadedly connected to the threaded hole.
[0009] Preferably, the outer circular wall of the furnace body has two feed holes, and two feed pipes are fixed on the outer wall of the furnace body. The feed pipes are connected to the feed holes, and a cover is hinged to the end of the feed pipe away from the furnace body.
[0010] Preferably, the furnace body has an installation cavity inside, and a heat insulation layer is fixed inside the installation cavity.
[0011] Preferably, a fixing ring is provided above the furnace body, the fixing ring is in contact with the outer wall surface of the inner ring guide tube, the middle ring guide tube and the outer ring guide tube, and a connecting block is fixed to the bottom surface of the fixing ring, the connecting block is fixed to the top surface of the furnace body.
[0012] Preferably, two pull rings are fixed on the top surface of the cover plate.
[0013] Preferably, a first temperature sensor is fixed to the inner wall of the furnace body, and a second temperature sensor is fixed to the bottom surface of the cover plate.
[0014] The present invention also provides an installation method for an oven duct installation structure, comprising the following steps:
[0015] S1: The staff first fixes several fixing blocks in three concentric rings on the inner bottom surface of the furnace body. Then, the triangular support and shims are fixed on the fixing blocks. The inner ring pipe, middle ring pipe and outer ring pipe are fixed on the triangular support. According to the distribution of the fixing blocks, the three types of pipes will be distributed to form three concentric rings, and the distance between the pipes in each ring is maintained at 1.5m for uniform arrangement.
[0016] S2: The staff places the cover plate on the top of the furnace, so that the bottom surface of the cover plate fits against the outer circular wall of the guide tube. There is a 600mm gap between the cover plate and the inner wall of the furnace body. Then, the channel steel is installed on the top surface of the cover plate through bolts and threaded holes, so that the channel steel can compact the cover plate.
[0017] S3: After the conduit and cover plate are installed, the workers install the first temperature sensor and the second temperature sensor on the inner wall of the furnace body and the bottom surface of the cover plate, respectively.
[0018] S4: Afterwards, the staff installed a fixing ring at the top of the furnace, fixing the bottom surface of the fixing ring to the outer circular wall of the guide tube, and then fixing the fixing ring to the top surface of the furnace body through the connecting block.
[0019] Compared with existing technologies, the installation structure of the oven duct using the above technical solution has the following advantages:
[0020] 1. During use, the staff sequentially introduces the inner ring duct, middle ring duct, and outer ring duct into the furnace body, arranging them into three concentric rings. The distance between the ducts in each ring is maintained at 1.5m for uniform distribution. The cover plate is placed on top of the ducts, leaving a 600mm gap between the cover plate and the inner wall of the furnace body. This allows the hot air to flow out along the edge of the cover plate, focusing on baking the carbon bricks and castables on the side walls of the furnace body. This can fully dry the castables and carbon bricks inside the furnace body. The arrangement of the three-ring furnace drying duct with the upper cover and lower pipe allows for more uniform and thorough baking inside the furnace body, extending the service life of the blast furnace. The improved method of upper cover and lower pipe arrangement of the furnace drying duct and cover plate greatly reduces the risk to the installation personnel and lays the foundation for the stable and smooth operation of the blast furnace.
[0021] 2. During use, by fixing triangular supports and gaskets at the bottom of the duct, the hot air blows along the side of the triangular supports onto the gaskets when the duct is vented, preventing the hot air from blowing directly onto the furnace bottom and thus preventing the hot air from damaging the bottom lining. The fixing block can use the gaskets and triangular supports to fix and position the duct inside the furnace body. When the cover plate covers the duct, the workers can place the channel steel on the top surface of the cover plate to compact the cover plate. The threaded connection of the bolts and threaded holes allows the bolts to fix the channel steel to the top surface of the cover plate through the mounting block, which is convenient for removal after the furnace is dried.
[0022] Third, during use, workers can feed the refractory material into the furnace through the feed hole and feed pipe, eliminating the need to feed the refractory material from the top of the furnace, which is more convenient for workers. The cover can prevent heat from the furnace from escaping through the feed pipe. When the furnace is being baked, the internal temperature of the furnace rises, and the insulation layer can prevent heat from escaping through the inner wall of the furnace to the outside, thus ensuring that the heat inside the furnace is focused on baking the furnace wall. Workers can fix the guide tube at the top of the furnace with the fixing ring, which makes the guide tube more stable during use.
[0023] Fourth, during use, when the staff removes the cover plate, they can connect it to the lifting equipment through the pull ring to remove the cover plate. This makes it convenient for the staff to remove the cover plate. The staff can monitor the temperature of the inner wall of the furnace body through the first temperature sensor and monitor the temperature of the furnace core inside the furnace body through the second temperature sensor. Attached Figure Description
[0024] Figure 1 This is a perspective view of an embodiment.
[0025] Figure 2This is an exploded view of an example.
[0026] Figure 3 This is a cross-sectional view of the furnace body in an embodiment.
[0027] Figure 4 This is an exploded view of the triangular support in an embodiment.
[0028] Figure 5 This is an exploded view of the cover plate in an embodiment.
[0029] Figure 6 This is an exploded view of the fixing ring in an embodiment.
[0030] Figure 7 This is an exploded view of the furnace body in an embodiment.
[0031] In the diagram: 1. Furnace body; 2. Outer ring guide tube; 3. Middle ring guide tube; 4. Inner ring guide tube; 5. Cover plate; 6. Triangular support; 7. Gasket; 8. Fixing block; 9. Channel steel; 10. Mounting block; 11. Connecting hole; 12. Threaded hole; 13. Bolt; 14. Feed hole; 15. Feed pipe; 16. Cover door; 17. Mounting cavity; 18. Insulation layer; 19. Fixing ring; 20. Connecting block; 21. Pull ring; 22. First temperature sensor; 23. Second temperature sensor. Detailed Implementation
[0032] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
[0033] like Figures 1-5 As shown, an installation structure for an oven guide tube includes an oven body 1. The oven body 1 contains several outer ring guide tubes 2, which are evenly distributed in a ring shape. Within the ring formed by the outer ring guide tubes 2, several middle ring guide tubes 3 are evenly distributed in a ring shape. Within the ring formed by the middle ring guide tubes 3, several inner ring guide tubes 4 are evenly distributed in a ring shape. A cover plate 5 is installed above the oven body 1. The bottom surface of the cover plate 5 is in contact with the outer wall surfaces of the inner ring guide tubes 4, middle ring guide tubes 3, and outer ring guide tubes 2. A 600mm gap is left between the cover plate 5 and the inner wall of the oven body 1. The cover plate 5 has a thickness of 3mm.
[0034] During operation, the workers sequentially introduced four inner ring guide tubes (4), eleven middle ring guide tubes (3), and fifteen outer ring guide tubes (2) into the furnace body (1), arranging them into three concentric rings. The guide tubes in each ring were evenly spaced at 1.5m intervals. A cover plate (5) was placed over the guide tubes, leaving a 600mm gap between the cover plate (5) and the inner wall of the furnace body (1). This allowed the hot air to flow out along the edge of the cover plate (5), focusing on baking the carbon bricks and castable refractory on the side walls of the furnace body (1). This effectively dried the castable refractory and carbon bricks inside the furnace body (1). The arrangement of the three-ring furnace baking guide tubes with an upper cover and lower tubes allowed for more uniform and thorough baking inside the furnace body (1), extending the blast furnace's service life. The improved method of the upper cover and lower tube arrangement of the furnace baking guide tubes and cover plate greatly reduced the risks for installation personnel and laid the foundation for the stable and smooth operation of the blast furnace.
[0035] like Figures 3-5 As shown, the bottom ends of the inner ring guide tube 4, the middle ring guide tube 3, and the outer ring guide tube 2 are all fixed with triangular supports 6. The bottom surface of the triangular support 6 is fixed with a gasket 7. The bottom surface of the gasket 7 is fixed with a fixing block 8. The bottom surface of the fixing block 8 is fixed to the inner bottom surface of the furnace body 1. The top surface of the cover plate 5 is provided with a channel steel 9. The two sides of the channel steel 9 are fixed with mounting blocks 10. The top surface of the mounting block 10 is provided with a connecting hole 11. The top surface of the cover plate 5 is provided with several threaded holes 12. The connecting hole 11 communicates with the threaded hole 12. The bolt 13 is rotatably installed inside the connecting hole 11. The bottom end of the bolt 13 passes through the connecting hole 11 and is threadedly connected to the threaded hole 12.
[0036] During use, by fixing the triangular support 6 and the gasket 7 at the bottom of the duct, the hot air blows along the side of the triangular support 6 onto the gasket 7 when the duct is vented, so that the hot air does not blow directly onto the furnace bottom, thus preventing the hot air from damaging the bottom lining. The fixing block 8 can fix and position the duct inside the furnace body 1 through the gasket 7 and the triangular support 6. When the cover plate 5 covers the duct, the operator can place the channel steel 9 on the top surface of the cover plate 5 to compact the cover plate 5. The threaded connection between the bolt 13 and the threaded hole 12 allows the bolt 13 to fix the channel steel 9 to the top surface of the cover plate 5 through the mounting block 10, which facilitates removal after the furnace is dried.
[0037] like Figures 2-3 and Figures 6-7 As shown, two feed holes 14 are opened on the outer circular wall of the furnace body 1. Two feed pipes 15 are fixed on the outer wall of the furnace body 1. The feed pipes 15 are connected to the feed holes 14. A cover door 16 is hinged to the end of the feed pipe 15 away from the furnace body 1. An installation cavity 17 is opened inside the furnace body 1. A heat insulation layer 18 is fixed inside the installation cavity 17. The heat insulation layer 18 is made of rock wool. A fixing ring 19 is set on the top of the furnace body 1. The fixing ring 19 is in contact with the outer wall of the inner ring guide tube 4, the middle ring guide tube 3 and the outer ring guide tube 2. A connecting block 20 is fixed on the bottom surface of the fixing ring 19. The connecting block 20 is fixed to the top surface of the furnace body 1.
[0038] During use, workers can feed the refractory material into the furnace body 1 through the feed hole 14 and the feed pipe 15, eliminating the need to feed the refractory material from the top of the furnace, which is convenient for workers. The cover door 16 can prevent the heat inside the furnace body 1 from being lost through the feed pipe 15. When the furnace body 1 is being baked, the temperature inside the furnace body 1 rises, and the heat insulation layer 18 can prevent the heat from being lost to the outside through the inner wall of the furnace body 1, thus ensuring that the heat inside the furnace body 1 is concentrated on baking the furnace wall. Workers can fix the conduit at the top of the furnace through the fixing ring 19, which makes the conduit more stable during use.
[0039] like Figures 1-3 and Figure 5 As shown, two pull rings 21 are fixed on the top surface of the cover plate 5, a first temperature sensor 22 is fixed on the inner wall of the furnace body 1, and a second temperature sensor 23 is fixed on the bottom surface of the cover plate 5.
[0040] During use, when the staff removes the cover plate 5, they can connect it to the lifting equipment through the pull ring 21 to remove the cover plate 5. This makes it convenient for the staff to remove the cover plate 5. The staff can monitor the temperature of the inner wall of the furnace body 1 through the first temperature sensor 22 and monitor the temperature of the furnace core inside the furnace body 1 through the second temperature sensor 23.
[0041] The present invention also provides an installation method for an oven duct installation structure, comprising the following steps:
[0042] S1: The staff first fixes several fixing blocks 8 in three concentric rings on the bottom surface of the furnace body 1. Then, the triangular support 6 and the gasket 7 are fixed on the fixing blocks 8. The inner ring guide tube 4, the middle ring guide tube 3 and the outer ring guide tube 2 are fixed on the triangular support 6. According to the distribution of the fixing blocks 8, the three types of guide tubes will be distributed to form three concentric rings, and the distance between the guide tubes in each ring is maintained at 1.5m for uniform arrangement.
[0043] S2: The staff places the cover plate 5 on the top of the furnace, so that the bottom surface of the cover plate 5 fits against the outer circular wall of the guide tube. The cover plate 5 leaves a gap of 600mm between itself and the inner wall of the furnace body 1. Then, the channel steel 9 is installed on the top surface of the cover plate 5 through bolts 13 and threaded holes 12, so that the channel steel 9 can compact the cover plate 5.
[0044] S3: After the conduit and cover plate 5 are installed, the workers install the first temperature sensor 22 and the second temperature sensor 23 on the inner wall of the furnace body 1 and the bottom surface of the cover plate 5, respectively.
[0045] S4: Then, the staff installs the fixing ring 19 at the top of the furnace, so that the bottom surface of the fixing ring 19 is fixed to the outer circular wall of the guide tube, and the fixing ring 19 is fixed to the top surface of the furnace body 1 through the connecting block 20.
[0046] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.
Claims
1. An installation structure of a furnace duct, comprising a furnace body (1), characterized in that, The furnace body (1) is provided with a number of outer ring guide tubes (2), which are evenly distributed in a ring shape. The ring formed by the outer ring guide tubes (2) is provided with a number of middle ring guide tubes (3), which are evenly distributed in a ring shape. The ring formed by the middle ring guide tubes (3) is provided with a number of inner ring guide tubes (4), which are evenly distributed in a ring shape. A cover plate (5) is provided on the top of the furnace body (1). The bottom surface of the cover plate (5) is in contact with the outer wall of the inner ring guide tubes (4), the middle ring guide tubes (3) and the outer ring guide tubes (2). A 600mm gap is left between the cover plate (5) and the inner wall of the furnace body (1). The thickness of the cover plate (5) is 3mm. The bottom ends of the inner ring conduit (4), the middle ring conduit (3) and the outer ring conduit (2) are all fixed with triangular supports (6), the bottom surface of the triangular support (6) is fixed with a gasket (7), the bottom surface of the gasket (7) is fixed with a fixing block (8), and the bottom surface of the fixing block (8) is fixed to the inner bottom surface of the furnace body (1). The top surface of the cover plate (5) is provided with a channel steel (9), and mounting blocks (10) are fixed on both sides of the channel steel (9). The top surface of the mounting block (10) is provided with a connecting hole (11), and the top surface of the cover plate (5) is provided with a plurality of threaded holes (12). The connecting hole (11) communicates with the threaded hole (12). A bolt (13) is rotatably provided inside the connecting hole (11). The bottom end of the bolt (13) passes through the connecting hole (11) and is threadedly connected to the threaded hole (12). Two feed holes (14) are opened on the outer circular wall of the furnace body (1). Two feed pipes (15) are fixed on the outer wall of the furnace body (1). The feed pipes (15) are connected to the feed holes (14). A cover door (16) is hinged to the end of the feed pipe (15) away from the furnace body (1). The furnace body (1) has an installation cavity (17) inside, and a heat insulation layer (18) is fixed inside the installation cavity (17). A fixing ring (19) is provided above the furnace body (1). The fixing ring (19) is in contact with the outer wall of the inner ring conduit (4), the middle ring conduit (3) and the outer ring conduit (2). A connecting block (20) is fixed on the bottom surface of the fixing ring (19). The connecting block (20) is fixed to the top surface of the furnace body (1).
2. The installation structure of a furnace duct according to claim 1, characterized by: Two pull rings (21) are fixed on the top surface of the cover plate (5).
3. The installation structure of a furnace duct according to claim 1, characterized by: A first temperature sensor (22) is fixed on the inner wall of the furnace body (1), and a second temperature sensor (23) is fixed on the bottom surface of the cover plate (5).
4. A method of installing a furnace duct mounting structure, which is adapted to a furnace duct mounting structure according to any one of claims 1 to 3, characterized by, The steps include the following: S1: The staff first fixes several fixed blocks (8) in three concentric rings on the bottom surface of the furnace body (1). Then, the triangular support (6) and the gasket (7) are fixed on the fixed blocks (8). The inner ring conduit (4), the middle ring conduit (3) and the outer ring conduit (2) are fixed on the triangular support (6). According to the distribution of the fixed blocks (8), the three conduits will be distributed to form three concentric rings, and the distance between the conduits in each ring is kept at 1.5m and evenly arranged. S2: The staff puts the cover plate (5) on the top of the furnace, so that the bottom surface of the cover plate (5) fits against the outer circular wall of the guide tube. The cover plate (5) leaves a gap of 600mm between itself and the inner wall of the furnace body (1). Then, the channel steel (9) is installed on the top surface of the cover plate (5) through bolts (13) and threaded holes (12) so that the channel steel (9) can compact the cover plate (5). S3: After the conduit and cover plate (5) are installed, the workers install the first temperature sensor (22) and the second temperature sensor (23) on the inner wall of the furnace body (1) and the bottom surface of the cover plate (5), respectively. S4: Then the staff installed a fixing ring (19) at the top of the furnace, so that the bottom surface of the fixing ring (19) was fixed to the outer wall of the guide tube, and the fixing ring (19) was fixed to the top surface of the furnace body (1) through the connecting block (20).