Blast furnace air supply energy-saving device for stainless steel manufacturing
By installing multiple high-temperature compensators on the periphery of the middle-pass pipe of the blast furnace air supply device, the combination of metal pipes, corrugated pipes and high-temperature ceramics can achieve angle and axial self-adjustment, which solves the problem that the existing blast furnace air supply device cannot perform axial compensation, avoid damage to the refractory lining, and ensure the normal and safe production of blast furnace smelting.
Patent Information
- Application Number
- CN202420858259.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-15
- Publication Date
- 2025-03-25
- Estimated Expiration
- 2035-01-15
AI Technical Summary
The existing blast furnace air supply device cannot perform axial compensation in high temperature and high pressure environments, resulting in cracks in refractory lining, air leakage, redness and other problems, affecting the normal and safe production of blast furnace smelting.
A blast furnace air supply and energy-saving device for stainless steel manufacturing is designed. By installing multiple high-temperature compensators on the periphery of the middle pipe, the combination of metal pipes, corrugated pipes and high-temperature ceramics can achieve angle and axial self-regulation to protect the refractory lining.
The device can self-adjust when temperature and pressure change, avoid damage to the refractory lining, prevent air leakage, redness and other problems, ensure the normal and safe production of blast furnace smelting, and extend the service life of the device.
Smart Images
Figure CN222665889U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of stainless steel related equipment, in particular to a blast furnace air supply energy-saving device for stainless steel material manufacturing. Background Art
[0002] The main ironmaking methods include blast furnace method, direct reduction method, molten reduction method, etc. The principle is that the ore is reduced to pig iron through physical and chemical reactions in a specific atmosphere (reducing substances CO, H2, C; suitable temperature, etc.). Except for a small part of pig iron used for casting, most of it is used as raw material for steelmaking. The blast furnace is an equipment used in the blast furnace method, and the air supply device is a crucial component of the blast furnace front equipment. It is also a weak link in the hot air duct system. It is easy for special conditions to occur and is the key to whether the blast furnace can produce normally.
[0003] One end of the air supply device in the prior art is composed of a gooseneck tube, a central tube, an elbow and a straight blowing tube with a refractory lining in the tube. Among them, the connection between the tubes, the cross ingot chain structure air supply device currently used generally adopts a spherical connection method. This connection method not only has the hidden danger of air leakage, but also has a fatal defect that it can only make angular compensation but not axial compensation, that is, when the air supply branch pipe expands due to heat, the pipe fittings can make a small angular offset between the pipe fittings, so as to fine-tune the branch pipe shape, thereby avoiding damage to the refractory lining; and this change is of no benefit to the axial deformation of the central tube fitting itself. However, in a high temperature and high pressure environment, the axial deformation of the central tube is the main factor causing cracks in the refractory lining. In actual production, it is precisely because of the various cracks in the lining of the air supply branch pipe that the air supply branch pipe has air leakage, redness, and excessive surface temperature. This affects the technical requirements for the tuyere in blast furnace smelting, and also affects normal and safe production, thereby affecting the service life of the device itself. Utility Model Content
[0004] In view of the deficiencies in the prior art, the utility model provides a blast furnace air supply energy-saving device for stainless steel manufacturing, which solves the problems existing in the background technology.
[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:
[0006] A blast furnace air supply energy-saving device for stainless steel manufacturing comprises a hot blast surrounding pipe, a noise reduction device and a high-temperature compensator. The bottom end of the hot blast surrounding pipe is equipped with a noise reduction device, and the noise reduction device is threadedly fixedly connected to a central tube through a threaded column. Two high-temperature compensators are installed on the periphery of the central tube. The central tube is fixedly connected through flanges, elbows and straight blowing pipes connected on one side and the middle respectively. Two fixing plates are fixedly installed on one side of the central tube, a tensioning device is hinged on one side of the fixing plate, a connecting rod is hinged on one side of the tensioning device, a connecting rod is welded to the middle of one side of the straight blowing pipe, an observation hole is fixedly installed on one side of the elbow, and a coal injection pipe is provided above the straight blowing pipe.
[0007] Preferably, an inner cavity is installed in the noise reduction device, a plurality of first silencers and second silencers are installed on the inner cavity, a plurality of diamond-shaped silencer holes are opened on the surface of the noise reduction device, and a threaded column is fixedly installed at the bottom end of the noise reduction device.
[0008] Preferably, the high-temperature compensator includes a metal tube, an upper flange is fixedly installed on the top of the metal tube, the upper flange is fixedly connected to the lower flange by bolts, a bellows is provided between the upper flange and the lower flange via a connecting pipe, and high-temperature ceramsite is provided in the cavity inside the bellows.
[0009] Preferably, the tensioning device is in the shape of a through hole, springs are fixedly mounted on inner walls on both sides of the tensioning device, a pressure plate is fixedly mounted on one side of the spring, and a pull rod is fixedly mounted on one side of the pressure plate.
[0010] Preferably, a pipeline is installed in the direct blowing pipe, a water injection layer is provided in the direct blowing pipe, one end of the water injection layer penetrates through the side wall of the direct blowing pipe to open a water injection pipe, and a pipe plug is installed on the top of the water injection pipe.
[0011] Compared with the prior art, the beneficial effects achieved by the utility model are:
[0012] The utility model provides a blast furnace air supply energy-saving device for stainless steel manufacturing, which is provided with a plurality of high-temperature compensators. The high-temperature compensators adopt the gap between two metal pipes, the refractory lining, the bellows and the high-temperature ceramsite, so that the whole pipeline not only has the angle compensation function but also has the axial compensation function, so that no matter how the temperature and pressure in the pipeline change, the refractory lining can be protected intact by the self-adjusting function of the high-temperature compensator, thereby avoiding the occurrence of air leakage, reddening, excessive surface temperature and the like, thereby ensuring the technical requirements of blast furnace smelting on the tuyere, and also ensuring normal and safe production, thereby increasing the service life of the device itself;
[0013] The utility model provides a plurality of first and second sound-reducing parts in the noise reduction device, so that the sound energy of the sound waves entering the noise reduction device is gradually reduced during the process of reflection or collision with the first and second sound-reducing parts, thereby achieving the effect of noise reduction. The diamond-shaped sound-reducing holes are provided to further improve the noise reduction effect. At the same time, a detachable structure is formed by threaded connection, which is convenient for installation and removal of the noise reduction device.
[0014] The utility model can reduce the surface temperature of the direct blowing pipe by arranging a water injection layer, a water injection pipe and a pipe plug in the direct blowing pipe, thereby increasing the service life of the direct blowing pipe.
[0015] The utility model is provided with an observation hole, so that the situation inside the elbow can be further observed, which is convenient for making adjustments when problems occur, thereby increasing its practicality. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model.
[0017] Figure 2 It is a schematic diagram of the internal structure of the noise reduction device of the utility model.
[0018] Figure 3 This is a schematic diagram of the structure of the low temperature compensator of the utility model.
[0019] Figure 4 It is a schematic diagram of the structure of the tensioning device of the utility model.
[0020] Figure 5 This is a schematic diagram of the internal structure of the direct blowing tube of the utility model.
[0021] In the figure: 1. hot air surrounding pipe; 2. noise reduction device; 2.1. diamond-shaped silencer hole; 2.2. inner cavity; 2.3. first silencer; 2.4. second silencer; 2.5. threaded column; 3. high temperature compensator; 3.1. refractory lining; 3.2. upper flange; 3.3. bolts; 3.4. metal pipe; 3.5. lower flange; 3.6. connecting pipe; 3.7. bellows; 3.8. high temperature ceramsite; 4. middle through pipe; 5. flange; 6. fixing plate; 7. tensioning device; 7.1. pull rod; 7.2. pressure plate; 7.3. spring; 8. connecting rod; 9. elbow; 10. straight blowing pipe; 11. water injection layer; 12. coal injection pipe; 13. water injection pipe; 14. pipe plug; 15. observation hole. DETAILED DESCRIPTION
[0022] To further illustrate each embodiment, the present invention provides drawings, which are part of the disclosure of the present invention and are mainly used to illustrate the embodiments. They can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, ordinary technicians in the field should be able to understand other possible implementation methods and advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.
[0023] According to an embodiment of the utility model, a blast furnace air supply energy-saving device for stainless steel manufacturing is provided.
[0024] Embodiment 1:
[0025] As shown in the attached figure of the instruction manual Figure 1 As shown, a blast furnace air supply energy-saving device for stainless steel manufacturing includes a hot blast surrounding pipe 1, a noise reduction device 2, and a high-temperature compensator 3. The bottom end of the hot blast surrounding pipe 1 is installed with the noise reduction device 2, and the noise reduction device 2 is threadedly fixedly connected with a central tube 4 through a threaded column 2.5. Two high-temperature compensators 3 are installed on the periphery of the central tube 4. The central tube 4 is fixedly connected through a flange 5, an elbow 9, and a straight blowing pipe 10 connected on one side and the middle respectively. Two fixing plates 6 are fixedly installed on one side of the central tube 4, a tensioning device 7 is hinged on one side of the fixing plate 6, a connecting rod 8 is hinged on one side of the tensioning device 7, a connecting rod 8 is welded to the middle of one side of the straight blowing pipe 10, an observation hole 15 is fixedly installed on one side of the elbow 9, and a coal injection pipe 12 is provided above the straight blowing pipe 10.
[0026] An inner cavity 2.2 is installed in the noise reduction device 2, and a plurality of first silencers 2.3 and second silencers 2.4 are installed on the inner cavity 2.2, so that the sound energy of the sound waves entering the noise reduction device 2 is gradually reduced during the process of reflection or collision with the first silencers 2.3 and the second silencers 2.4, thereby achieving the noise reduction effect; a plurality of diamond-shaped silencer holes 2.1 are opened on the surface of the noise reduction device 2, which further improves the noise reduction effect; a threaded column 2.5 is fixedly installed at the bottom end of the noise reduction device 2, which is convenient for installing and disassembling the noise reduction device 2.
[0027] The cavity in the bellows 3.7 is provided with high temperature ceramsite 3.8, and the high temperature ceramsite 3.8 can withstand 1450-1550°C.
[0028] A water injection layer 11 is provided in the direct blowing pipe 10, and a water injection pipe 13 is provided at one end of the water injection layer 11 through the side wall of the direct blowing pipe 10. A pipe plug 14 is installed at the top of the water injection pipe 13, which can reduce the surface temperature of the direct blowing pipe 10, thereby increasing the service life of the direct blowing pipe 10.
[0029] An observation hole 15 is fixedly installed on one side of the elbow 9, which can further observe the situation inside the elbow 9, facilitate adjustment when problems occur, and increase its practicality.
[0030] Embodiment 2:
[0031] As shown in the attached figure of the instruction manual Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, a blast furnace air supply energy-saving device for stainless steel manufacturing is firstly fixed to the central tube 4 by threaded columns 2.5 with a hot blast surrounding pipe 1 equipped with a noise reduction device 2, and then the central tube 4, the bent pipe 9 and the straight blowing pipe 10 are connected and fixed by flange 5, and the straight blowing pipe 10 is connected to the blast furnace, and all the tensioning devices 7 are adjusted and locked in place, and the hot blast sent from the hot blast surrounding pipe 1 is firstly subjected to noise reduction treatment by the noise reduction device 2, and then sent into the furnace of the blast furnace, so as to provide thermal energy for the blast furnace.
[0032] The utility model is provided with a plurality of high-temperature compensators 3, which adopt the gap between two metal tubes 3.4, the coordination between the refractory lining 3.1, the bellows 3.7 and the high-temperature ceramsite 3.8, so that the overall pipeline not only has an angle compensation function but also has an axial compensation function, so that no matter how the temperature and pressure in the pipeline change, the refractory lining 3.1 can be protected intact by the self-adjusting function of the high-temperature compensator, thereby avoiding the occurrence of air leakage, reddening, excessive surface temperature and the like, thereby ensuring the technical requirements of blast furnace smelting for the tuyere, and also ensuring normal and safe production, thereby increasing the service life of the device itself.
[0033] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.
[0034] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.
Claims
1. A blast furnace air supply energy-saving device for stainless steel production, characterized in that: The invention comprises a hot air surrounding pipe (1), a noise reduction device (2), and a high temperature compensator (3). The bottom end of the hot air surrounding pipe (1) is provided with a noise reduction device (2). The noise reduction device (2) is threadedly fixedly connected to a central through pipe (4) through a threaded column (2.5). Two high temperature compensators (3) are installed on the periphery of the central through pipe (4). The central through pipe (4) is fixedly connected through a flange (5) connected at one side and the middle, a bend pipe (9), and a straight blowing pipe (10) respectively. Two fixing plates (6) are fixedly installed on one side of the central through pipe (4). A tensioning device (7) is hingedly connected to one side of the fixing plate (6). A connecting rod (8) is hingedly connected to one side of the tensioning device (7). A connecting rod (8) is welded to the middle of one side of the straight blowing pipe (10). An observation hole (15) is fixedly installed on one side of the bend pipe (9). A coal injection pipe (12) is arranged above the straight blowing pipe (10).
2. The blast furnace air supply energy-saving device for stainless steel production according to claim 1, characterized in that: An inner cavity (2.2) is installed in the noise reduction device (2), a plurality of first silencers (2.3) and a second silencer (2.4) are installed on the inner cavity (2.2), a plurality of diamond-shaped silencer holes (2.1) are opened on the surface of the noise reduction device (2), and a threaded column (2.5) is fixedly installed at the bottom end of the noise reduction device (2).
3. The blast furnace air supply energy-saving device for stainless steel production according to claim 1, characterized in that: The high temperature compensator (3) comprises a metal tube (3.4), an upper flange (3.2) is fixedly mounted on the top of the metal tube (3.4), the upper flange (3.2) is fixedly connected to a lower flange (3.5) via bolts (3.3), a bellows (3.7) is provided between the upper flange (3.2) and the lower flange (3.5) via a connecting pipe (3.6), and a cavity in the bellows (3.7) is provided with high temperature ceramsite (3.8).
4. The blast furnace air supply energy-saving device for stainless steel production according to claim 1, characterized in that: The tensioning device (7) is in the shape of a through hole, and springs (7.3) are fixedly mounted on the inner walls on both sides of the tensioning device (7), a pressure plate (7.2) is fixedly mounted on one side of the spring (7.3), and a pull rod (7.1) is fixedly mounted on one side of the pressure plate (7.2).
5. The blast furnace air supply energy-saving device for stainless steel production according to claim 1, characterized in that: A pipeline is installed in the direct blowing pipe (10), a water injection layer (11) is provided in the direct blowing pipe (10), one end of the water injection layer (11) penetrates through the side wall of the direct blowing pipe (10) to open a water injection pipe (13), and a pipe plug (14) is installed at the top end of the water injection pipe (13).