Tuyere medium sleeve with protection enhancing function

Abstract

The tuyere medium sleeve with the protection enhancing function comprises a cylindrical body, and the front end and the rear end of the body are used for being connected with a small tuyere sleeve and a large tuyere sleeve correspondingly to form a hollow sleeve body used for clamping an air supply channel; a cooling cavity is formed in the body wall of the body, and a side grouting opening penetrating through the body wall is formed in the thickness direction of the body wall. A grouting channel penetrating from the rear end to the front end is formed in the length direction of the body wall, a grouting outlet is formed towards the surface of the outer wall of the tuyere small sleeve, and the grouting channel can be repeatedly drilled and dredged so that slurry can flow through the grouting channel many times and can be repeatedly used. According to the tuyere medium sleeve, the grouting channel from the rear end to the front end is designed, so that the grouting material can form a protection layer on the outer wall of the tuyere small sleeve, the protection effect of the tuyere small sleeve is enhanced, and the wear resistance and erosion resistance are improved. The grouting channel can be dredged by drilling, multiple grouting operations are allowed, the maintainability of the structure is improved, and the service life is prolonged.

Description

Technical Field

[0001] The present application relates to the technical field of blast furnace cooling equipment, and in particular to a tuyere sleeve with enhanced protection. Background Art

[0002] The tuyere middle sleeve is a crucial cooling device in blast furnace production. It connects to the large and small tuyere sleeves, forming an air inlet channel. Traditionally, the grouting location for the tuyere middle sleeve is located on the sidewalls of the sleeve. Grouting is performed immediately after installation to fill the gaps between the ends of the sleeve and the connections between the large and small tuyere sleeves.

[0003] However, the side wall of the tuyere sleeve is more likely to be burned through due to dripping slag iron during actual use, and the traditional grouting method cannot cover the outer side of the tuyere sleeve to protect the tuyere sleeve.

[0004] Therefore, it is a technical problem to be solved urgently to propose a tuyere middle sleeve that can continuously protect the outer side surface of the tuyere small sleeve and extend the service life of the tuyere small sleeve. Utility Model Content

[0005] In response to the technical problems existing in the prior art, the present application proposes a tuyere middle sleeve with enhanced protection, which is used to solve at least one of the above technical problems, so that the outer side of the tuyere small sleeve can be continuously protected and the tuyere component has a long service life.

[0006] The present application includes a cylindrical body, the front and rear ends of the body are respectively used to be connected with the air outlet small sleeve and the air outlet large sleeve to form a hollow sleeve for clamping the air supply channel; wherein, the air outlet direction of the hollow sleeve is taken as the front; a cooling cavity is provided inside the body wall of the body, and a penetrating side grouting port is provided in the body wall of the body along its thickness direction, and a grouting channel is provided from the rear end to the front end along the length direction of the body wall of the cylindrical body, the grouting channel is located on one side of the rear end as a grouting inlet, and on the side of the front end as a grouting outlet, and the grouting outlet is opened toward the outer wall surface of the air outlet small sleeve so that the slurry flows out from the grouting outlet and condenses on the outer wall surface of the air outlet small sleeve to form a protective layer; wherein, the cooling cavity and the side grouting port and the grouting channel are each isolated from each other and not connected; the grouting channel is a reusable channel that can be drilled and dredged so that the slurry can flow through it multiple times.

[0007] Optionally, according to an embodiment of the present application, the cooling chamber includes a high-speed water channel chamber close to the front end and a main cooling chamber connected to the high-speed water channel chamber, the high-speed water channel chamber is surrounded by the inner wall of the front end and the annular high-speed water channel baffle; the rear end is provided with a water inlet and a water outlet connected to the cooling chamber, the water inlet is connected to the first water channel, the first water channel includes a first baffle and a second baffle, one end of the first baffle and the second baffle are respectively arranged on the inner wall of the rear end, the other end of the first baffle is connected to one end of the high-speed water channel baffle, and the other end of the second baffle is arranged on the inner wall of the front end, and the other end of the high-speed water channel baffle is arranged at a certain distance from the second baffle to form a connecting port between the high-speed water channel chamber and the main cooling chamber; wherein, the cooling water flows along the first water channel to the front end and enters the high-speed water channel chamber, and enters the main cooling chamber from the connecting port after circulating along the high-speed water channel chamber for a circle.

[0008] Optionally, according to an embodiment of the present application, the main cooling cavity includes a plurality of guide plates, and the cooling water flows along the plurality of guide plates until it flows to the water outlet.

[0009] Optionally, according to an embodiment of the present application, the plurality of guide plates are arranged in a direction surrounding the center line of the tuyere sleeve, and the cooling water flows spirally around the tuyere sleeve.

[0010] Optionally, according to an embodiment of the present application, the plurality of guide plates are arranged along the tangential direction of the main body, and the cooling water flows back and forth along the guide plates along the length direction of the main body until it flows toward the water outlet.

[0011] Optionally, according to an embodiment of the present application, the grouting inlet is provided with a removable grouting pipe plug.

[0012] The tuyere sleeve with enhanced protection proposed in this application features a grouting channel extending from the rear end to the front end, allowing the grouting material to form a protective layer on the outer wall of the tuyere sleeve. This enhances the sleeve's protective function, improves its resistance to wear and erosion, reduces wear on the tuyere assembly, and extends its service life. The grouting channel flows out from the front end, allowing the grouting material to evenly cover the outer wall of the tuyere sleeve, improving grouting efficiency and effectiveness. The grouting channel can be drilled and unblocked, allowing for multiple grouting operations, increasing the structure's maintainability and extending its service life. The protective layer formed by the grouting material on the outer wall of the tuyere sleeve enhances the overall structural strength and stability of the tuyere sleeve. This application also features a high-speed cooling chamber near the front end, enhancing the cooling effect of the tuyere sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Below, the preferred embodiments of the present application will be further described in detail with reference to the accompanying drawings, wherein:

[0014] Figure 1 This is a schematic diagram of the overall structure of the tuyere sleeve of one embodiment of the present application;

[0015] Figure 2 yes Figure 1 Axial cross-sectional view;

[0016] Figure 3 This is a schematic diagram of the connection relationship between the middle tuyere sleeve and the small tuyere sleeve in one embodiment of the present application;

[0017] Figure 4 This is a schematic diagram of the overall assembly relationship between the large tuyere sleeve, the medium tuyere sleeve, the small tuyere sleeve and the air supply channel in one embodiment of the present application;

[0018] Figure 5 This is a schematic diagram of the internal water channel structure of an embodiment of the present application;

[0019] Figure 6 This is a schematic diagram of the internal waterway structure of another embodiment of the present application.

[0020] Reference numerals:

[0021] 10. Main body; 11. Front end; 12. Rear end; 90. Small air outlet sleeve; 100. Large air outlet sleeve; 110. Air supply channel; 19. Hollow sleeve; 21. High-speed water channel cavity; 217. Connecting port; 22. Main cooling cavity; 25. High-speed water channel baffle; 26. First water channel; 261. First baffle; 262. Second baffle; 226. Guide plate; 27. Water outlet; 28. Water inlet; 30. Side grouting port; 40. Grouting channel; 41. Grouting inlet; 42. Grouting outlet; 43. Grouting pipe plug; 45. Protective layer. DETAILED DESCRIPTION

[0022] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0023] In the detailed description that follows, reference may be made to the various drawings that form part of this application and illustrate specific embodiments of the present application. In the drawings, similar reference numerals describe substantially similar components in different figures. Each specific embodiment of the present application is described below in sufficient detail to enable a person of ordinary skill in the art to implement the technical solutions of the present application. It should be understood that other embodiments may be utilized or that structural, logical, or electrical changes may be made to the embodiments of the present application.

[0024] like Figures 1-4 As shown, the present application proposes a tuyere sleeve with enhanced protection. The sleeve comprises a cylindrical body 10. The front end 11 and rear end 12 of the body 10 are respectively connected to the small tuyere sleeve 90 and the large tuyere sleeve (not shown) to form a hollow sleeve 19 that holds an air supply channel 110. The air outlet direction of the hollow sleeve 19 is considered the front. The body 10 defines a cooling cavity (not shown) within its wall. The body 10 also defines side grouting ports 30 extending through its thickness. The cooling cavity is used to allow cooling water to flow into the tuyere sleeve. The side grouting ports are primarily used for grouting to achieve a seal. Specifically, grouting material injected through the side grouting ports fills the gap between the tuyere sleeve and the small tuyere sleeve, effectively preventing leakage of gas transported by the hollow sleeve 19 and ensuring stable pressure within the blast furnace. After the grouting material solidifies, it secures the position of the small tuyere sleeve, forming a solid, integrated whole with the tuyere sleeve, enhancing structural stability. The cooling chamber is isolated from the side grouting port 30 and the grouting channel 40 and is not connected to each other. This isolation prevents grouting material from entering the cooling chamber, preventing it from clogging the cooling water channel or affecting the cooling effect, thereby ensuring the normal operation of the cooling system. Because the cooling chamber is independent of the grouting channel, the cooling water can effectively absorb the heat in the tuyere jacket without being interfered with by the grouting material, maintaining the cooling efficiency of the blast furnace operation. This design not only ensures the key functions of the blast furnace tuyere area (i.e., cooling and sealing), but also improves the overall performance of the system and the convenience of operation.

[0025] See also Figure 4 As shown, the front end 11 of the middle air outlet sleeve of the present application is connected to the small air outlet sleeve 90, and the rear end 12 of the middle air outlet sleeve is connected to the large air outlet sleeve 70. The three sleeves together form a hollow pipe along the axial direction, which is used to clamp the air supply channel 110 and protect the outer surface of the air supply channel 110.

[0026] Continue as Figures 1-4As shown, the present application proposes an air vent sleeve with enhanced protective effect, and a grouting channel 40 is provided along the length direction of the body wall of the cylindrical main body 10, which runs from the rear end 12 to the front end 11. The grouting channel 40 is located on one side of the rear end 12 as a grouting inlet 41, and is located on one side of the front end 11 as a grouting outlet 42. The grouting outlet 42 is opened toward the outer wall surface of the air vent sleeve so that the slurry flows out from the grouting outlet 42 and condenses on the outer wall surface of the air vent sleeve to form a protective layer 45. In the embodiment of the present application, the grouting channel 40 is a reusable channel that can be repeatedly drilled and dredged so that the slurry can flow through it multiple times.

[0027] The drillable dredging of the grouting channel in the tuyere sleeve proposed in this application means that when the grouting material fails or needs to be resealed, the channel can be cleaned by drilling and then re-grouting without replacing the entire tuyere sleeve, which greatly improves the reusability of the components and reduces maintenance costs and downtime.

[0028] During actual use, the side walls of the tuyere sleeve are easily burned through by dripping slag. In this application, a protective layer can be formed by grouting the channel to cover the outer surface of the tuyere sleeve to protect the sleeve. The protective layer can effectively reduce the wear on its surface caused by furnace charge and coal gas, extending the service life of the tuyere sleeve. It can also isolate some heat, lower the operating temperature of the tuyere sleeve, reduce the impact of thermal stress on the material, and prevent material performance degradation caused by high temperature. Due to the presence of the protective layer, the maintenance and replacement frequency of the tuyere sleeve is reduced, reducing downtime and maintenance costs, and improving the overall operating efficiency of the blast furnace.

[0029] Therefore, the grouting channel of the present application that can repeatedly grout to continuously form a protective layer on the surface of the tuyere sleeve not only improves the service life of the tuyere middle sleeve of the present application, but also improves the service life of the tuyere small sleeve connected to the tuyere middle sleeve of the present application, extends the service life of the blast furnace, reduces material consumption, and realizes the effective utilization and conservation of resources.

[0030] like Figure 5-Figure 6As shown, the cooling chamber includes a high-speed water channel chamber 21 near the front end 11 and a main cooling chamber 22 connected to the high-speed water channel chamber 21. The high-speed water channel chamber 21 is surrounded by the inner side wall of the front end 11 and the annular high-speed water channel baffle 25; the rear end 12 is provided with a water inlet 27 and a water outlet 28 communicating with the cooling chamber 20, the water inlet 27 is connected to the first water channel 26, and the first water channel 26 includes a first baffle 261 and a second baffle 262. One end of the first baffle 261 and the second baffle 262 are respectively arranged in the rear end 12 On the side wall, the other end of the first baffle 261 is connected to one end of the high-speed water channel baffle 25, and the other end of the second baffle 262 is arranged on the inner wall of the front end 11. The other end of the high-speed water channel baffle 25 is arranged at a certain distance from the second baffle 262 to form a connecting port 217 between the high-speed water channel cavity 21 and the main cooling cavity 22; wherein, the cooling water flows along the first water channel 26 to the front end 11 and enters the high-speed water channel cavity 21, and after circulating along the high-speed water channel cavity 21 for a circle, enters the main cooling cavity 22 from the connecting port 217.

[0031] As water flows from the larger diameter rear end 12 of a conical cylindrical tuyere to the smaller diameter front end 11, the diameter changes and influences the flow rate according to hydrodynamics. According to the continuity equation (also known as the mass conservation equation) in fluid mechanics, for incompressible fluids, the flow rate through any cross-section of the pipe is equal at all times. This equation can be expressed as: A1v1 = A2v2.

[0032] Where A1 and A2 are the cross-sectional areas at the rear and front ends of the cylinder, respectively; v1 and v2 are the water flow velocities at the rear and front ends, respectively. Because A1 > A2, to maintain flow continuity, the water flow velocity v1 at the front end must be greater than the flow velocity v2 at the rear end.

[0033] In some embodiments, the water flow velocity in the high-speed water channel cavity at the front end of the tuyere sleeve is about 6 m / s, and the water flow velocity in the main cooling cavity is about one or two meters per second. Moreover, the flow velocity in the main cooling cavity is uneven, with some areas having fast flow velocity and some areas having slow flow velocity.

[0034] The increase in flow velocity in the high-speed water channel cavity has a direct positive impact on the cooling effect for the following reasons:

[0035] Enhanced heat transfer: An increase in flow rate means that the contact time of the cooling water with the surface being cooled is reduced, but due to fluid dynamics effects such as increased turbulence, the heat exchange efficiency can be improved.

[0036] Reducing boundary layer thickness: Under high flow conditions, the boundary layer of the fluid (the layer of fluid near the solid surface where the velocity gradually decreases to zero) becomes thinner, thereby increasing the heat transfer coefficient at the surface.

[0037] In this application, the high-speed water channel cavity is designed at the front end of the tuyere sleeve, which can more effectively cool the tuyere sleeve, as this is the area where heat exchange is most intense. The high-speed water flow can remove more heat, reducing the operating temperature of the tuyere sleeve of this application. Furthermore, the high-speed water channel cavity near the front end helps prevent material degradation or thermal damage to the tuyere sleeve connected to the tuyere sleeve of this application due to high temperatures, thereby extending the service life of the tuyere sleeve.

[0038] Continue as Figure 5-Figure 6 As shown, according to an embodiment of the present application, the main cooling cavity 22 includes a plurality of guide plates 226 , and the cooling water flows along the plurality of guide plates 226 until it flows to the water outlet 28 .

[0039] In some embodiments, the plurality of guide plates are arranged in a direction surrounding the center line of the tuyere sleeve, and the cooling water flows spirally around the tuyere sleeve.

[0040] Optionally, according to an embodiment of the present application, the plurality of guide plates 226 are arranged along the tangential direction of the main body 10, and the cooling water flows back and forth along the guide plates along the length direction of the main body until it flows to the water outlet.

[0041] Regardless of the setting method adopted, the function of the guide plate is to guide the cooling water to flow along the guide plate, and flow in the direction of the guide plate until it flows to the water outlet.

[0042] Optionally, according to an embodiment of the present application, the grouting inlet is provided with a removable grouting pipe plug 43.

[0043] The tuyere sleeve with enhanced protection proposed in this application features a grouting channel extending from the rear end to the front end, allowing the grouting material to form a protective layer on the outer wall of the tuyere sleeve. This enhances the sleeve's protective function, improves its resistance to wear and erosion, reduces wear on the tuyere assembly, and extends its service life. The grouting channel flows out from the front end, allowing the grouting material to evenly cover the outer wall of the tuyere sleeve, improving grouting efficiency and effectiveness. The grouting channel can be drilled and unblocked, allowing for multiple grouting operations, increasing the structure's maintainability and extending its service life. The protective layer formed by the grouting material on the outer wall of the tuyere sleeve enhances the overall structural strength and stability of the tuyere sleeve. This application also features a high-speed cooling chamber near the front end, enhancing the cooling effect of the tuyere sleeve.

[0044] The above embodiments are only used to illustrate the present application and are not intended to limit the present application. Ordinary technicians in the relevant technical field can make various changes and modifications without departing from the scope of the present application. Therefore, all equivalent technical solutions should also fall within the scope disclosed in the present application.

Claims

1. A tuyere sleeve with enhanced protection, comprising a cylindrical body, the front end of which is connected to a small tuyere sleeve, and the rear end of which is connected to a large tuyere sleeve to form a hollow sleeve for clamping an air supply channel; wherein, The air outlet direction of the hollow casing is the front; a cooling cavity is provided inside the body wall of the body, and a side grouting port penetrating the body wall is provided along the thickness direction of the body wall, characterized in that: A grouting channel is provided along the length direction of the body wall of the main body, which runs from the rear end to the front end. The side of the grouting channel located at the rear end is a grouting inlet, and the side located at the front end is a grouting outlet. The grouting outlet is opened toward the outer wall surface of the tuyere sleeve so that the slurry flows out of the grouting outlet and condenses on the outer wall surface of the tuyere sleeve to form a protective layer; wherein, The cooling cavity, the side grouting port and the grouting channel are isolated from each other and are not connected.

2. The tuyere cover with enhanced protection according to claim 1, characterized in that: The grouting channel is a reusable channel that can be repeatedly drilled and dredged so that the slurry can flow through it multiple times.

3. The tuyere cover with enhanced protection according to claim 1, characterized in that: The cooling chamber includes a high-speed water channel chamber near the front end and a main cooling chamber connected thereto. The high-speed water channel chamber is surrounded by the inner side wall of the front end and the annular high-speed water channel baffle. The rear end is provided with a water inlet and a water outlet connected to the cooling chamber. The water inlet is connected to the first water channel. A baffle assembly is provided in the first water channel for guiding cooling water into the high-speed water channel chamber.

4. The tuyere cover with enhanced protection according to claim 3, characterized in that: The baffle assembly includes a first baffle and a second baffle, one end of the first baffle and the second baffle are respectively arranged on the inner side wall of the rear end, the other end of the first baffle is connected to one end of the high-speed water channel baffle, and the other end of the second baffle is arranged on the inner side wall of the front end, and the other end of the high-speed water channel baffle is arranged at a certain distance from the second baffle to form a communication port between the high-speed water channel cavity and the main cooling cavity; wherein, The cooling water flows along the first water channel to the front end and enters the high-speed water channel cavity, and then flows along the high-speed water channel cavity for a circle and enters the main cooling cavity from the communication port.

5. The tuyere cover with enhanced protection according to claim 3, characterized in that: The cooling cavity includes a plurality of guide plates, and the cooling water flows along the plurality of guide plates until it flows to the water outlet.

6. The tuyere cover with enhanced protection according to claim 5, characterized in that: The plurality of guide plates are arranged in a direction surrounding the center line of the tuyere sleeve, and the cooling water flows spirally around the tuyere sleeve.

7. The tuyere cover with enhanced protection according to claim 5, characterized in that: The plurality of guide plates are arranged along the tangential direction of the main body, and the cooling water reciprocates along the guide plates along the length direction of the main body until it flows toward the water outlet.

8. The tuyere cover with enhanced protection according to claim 1, characterized in that: The grouting inlet is provided with a removable grouting pipe plug.

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