Gas flow guiding device and blast furnace distributing equipment
By introducing a gas flow guide device into the blast furnace burden distribution equipment, the gas flow trajectory is changed, the temperature in the center of the blast furnace empty area is reduced, the high-temperature erosion problem is solved, the service life of the drive arm and burden distribution equipment is extended, and efficient production and economic benefits are achieved.
Patent Information
- Application Number
- CN202422777322.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-14
- Publication Date
- 2025-09-16
- Estimated Expiration
- 2034-11-14
AI Technical Summary
The central coking technology of blast furnaces causes the distribution equipment to face harsh environments such as high temperature, high pressure, material impact and corrosive media, which seriously shortens its service life and affects production stability and continuity.
A coal gas flow guiding device is designed, including a water-cooling component and a connecting component. The guide plate is set at an angle to the driving arm, and cooling channels are arranged at intervals along the length or width of the guide plate. The cooling channels are connected to the driving arm through the connecting component, thereby changing the movement trajectory of the coal gas flow, reducing the center temperature of the blast furnace empty area, and reducing high-temperature erosion of the driving arm.
Significantly improve the service life of material distribution equipment, reduce wear and tear, reduce the number of abnormal operating conditions, achieve good economic benefits, and support online replacement and maintenance.
Smart Images
Figure CN223342732U_ABST
Abstract
Description
Technical Field
[0001] The present application belongs to the technical field of blast furnaces, and specifically relates to a coal gas flow guiding device and blast furnace charging equipment. Background Art
[0002] With the rapid development of the steel industry, the structure of blast furnace charges has undergone significant changes. In recent years, the grade of imported ore has steadily declined, directly impacting the efficiency and cost of blast furnace ironmaking. To meet this challenge and improve the overall grade of incoming charge, the proportion of pelletized ore in the charge structure has continued to increase. This change has led to the development of a new blast furnace charge distribution method—center coking. This method involves adding coke to the center of the charge to optimize charge distribution and increase its calorific value.
[0003] However, the implementation of central coking technology has led to changes in the temperature distribution in the upper part of the blast furnace, particularly a significant increase in the temperature at the center of the furnace's dead zone. This temperature increase significantly exceeds the design operating temperature of the blast furnace's charging equipment, posing a severe challenge. In the bellless blast furnace's top charging system, the charging chute is the final and crucial link. Connected to the charging device via a drive arm, the charging chute operates at the top of the blast furnace cavity, at the interface between the hot and cold parts of the blast furnace and the equipment. Under normal operating conditions, the charging chute operates at a pressure of 0.25-0.28 MPa and a temperature between 150°C and 250°C. However, under abnormal operating conditions, temperatures can briefly reach 600°C, with transient highs reaching as high as 900°C.
[0004] With the implementation of central coking technology in blast furnaces, the temperature at the center of the furnace roof has further increased. This has exposed the charge distribution chute and drive arm to a harsh operating environment characterized by high temperature, high pressure, material impact, and corrosive media. These harsh conditions have severely shortened the service life of the charge distribution equipment and posed a significant threat to the stability and continuity of blast furnace production. Summary of the Invention
[0005] In order to solve the above technical problems, the present application provides a coal gas flow guiding device and blast furnace charging equipment.
[0006] The technical solution adopted to achieve the purpose of this application is a gas flow guiding device applied to blast furnace charging equipment, comprising:
[0007] A water-cooling assembly comprising a guide plate and a cooling channel, wherein the guide plate is arranged at an angle to the drive arm of the blast furnace charging device, the guide plate has an internal accommodating cavity, the cooling channel is located in the accommodating cavity, and the cooling channel has pipes arranged at intervals along the length or width of the guide plate; or has chambers separated along the length or width of the guide plate and connected to each other;
[0008] Two sets of connecting components, one end of the connecting component is connected to the guide plate, and the other end of the connecting component is used to connect the driving arm corresponding to the blast furnace distribution equipment.
[0009] In some embodiments, the cooling channel forms a serpentine structure along the length direction or the width direction of the guide plate.
[0010] In some embodiments, the guide plate is provided with an arc-shaped notch in the direction of rotation of the distribution chute of the blast furnace distribution equipment.
[0011] In some embodiments, the water cooling assembly further includes an inlet water pipe and an outlet water pipe both in communication with the cooling channel.
[0012] In some embodiments, the water cooling assembly further includes an inlet joint and an outlet joint provided on the guide plate, the inlet water pipe is detachably connected to the inlet joint, and the outlet water pipe is detachably connected to the outlet joint.
[0013] In some embodiments, the connecting assembly includes a suspension plate connected to the guide plate, the suspension plate is rotatably connected to the driving arm, and the suspension plate is arranged at an angle to the guide plate.
[0014] In some embodiments, the guide plate is further provided with a connecting plate connected to the suspension plate, the connecting plate is provided with a first connecting hole, the suspension plate is provided with a second connecting hole corresponding to the first connecting hole, and the suspension plate and the connecting plate are fixedly connected by fasteners passing through the first connecting hole and the second connecting hole.
[0015] In some embodiments, the connecting plate is triangular in shape, a long side of the connecting plate is fixedly connected to the guide plate, and the first connecting hole is located on a side corresponding to the long side of the connecting plate.
[0016] In a second aspect of the present application, a blast furnace charge distribution device is provided, comprising:
[0017] two spaced-apart drive arms;
[0018] The above-mentioned gas flow guiding device, wherein the driving arm is connected to the water cooling assembly via the corresponding connecting assembly;
[0019] The material distribution chute is installed between the two driving arms.
[0020] In some embodiments, the blast furnace charging equipment further comprises a support shaft, a first mounting hole is provided on a side of the driving arm close to the guide plate, and a second mounting hole is provided on the suspension plate of the connecting assembly;
[0021] Both ends of the support shaft pass through the corresponding first mounting hole and second mounting hole in sequence, and the suspension plate is connected to the driving arm through threaded fasteners.
[0022] As can be seen from the above technical solution, the present application provides a gas flow guiding device and a blast furnace charging equipment. The gas flow guiding device is applied to the blast furnace charging equipment. The gas flow guiding device includes a water-cooling assembly and two sets of connecting assemblies. The water-cooling assembly includes a guide plate and a cooling channel. The guide plate is arranged at an angle to the driving arm of the blast furnace charging equipment. A receiving cavity is provided inside the guide plate. The cooling channel is located in the receiving cavity. The cooling channel is provided with pipes spaced apart along the length or width of the guide plate; or is provided with spaced and connected chambers separated along the length or width of the guide plate; one end of the connecting assembly is connected to the guide plate, and the other end of the connecting assembly is used to connect to the corresponding driving arm of the blast furnace charging equipment. The present application connects the driving arm to the water-cooling assembly through the connecting assembly. The guide plate can change the motion trajectory of the gas flow in the center of the blast furnace, prevent the driving arm from being directly eroded by the gas flow in the center of the blast furnace, reduce the temperature of the center of the blast furnace empty area, and significantly improve the service life of the charging equipment. At the same time, the driving arm is connected to the water-cooling assembly through the connecting assembly, which is convenient for disassembly and replacement, and obtains good economic benefits in blast furnace production and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] Figure 1 Schematic diagram of the structure of the gas flow guiding device in the embodiment of the present application.
[0024] Figure 2 This is a schematic diagram of the connection structure between the gas flow guiding device, the material distribution chute and the drive in the embodiment of the present application.
[0025] Figure 3 This is a schematic diagram of the water cooling component structure in an embodiment of the present application.
[0026] Explanation of the reference numerals: 100-gas flow guiding device, 110-water cooling assembly, 111-guide plate, 112-cooling channel, 113-pipeline, 114-arc-shaped notch, 115-inlet joint, 116-outlet joint, 117-inlet water pipe, 118-outlet water pipe, 120-connecting assembly, 121-suspension plate, 122-connecting plate, 123-positioning nut, 124-locking nut, 125-pin bolt, 200-material distribution chute, 210-support shaft, 300-driving arm. DETAILED DESCRIPTION
[0027] In order to enable those skilled in the art to which this application belongs to understand this application more clearly, the technical solution of this application is described in detail below through specific embodiments in conjunction with the accompanying drawings.
[0028] In the first aspect of the present application, a coal gas flow guiding device 100 is provided, which is applied to a blast furnace charging device, as shown in FIG. Figure 1 and attached Figure 3 As shown, the gas flow guiding device 100 includes a water-cooling component 110 and two sets of connecting components 120. The water-cooling component 110 includes a guide plate 111 and a cooling channel 112. The guide plate 111 is set at an angle to the driving arm 300 of the blast furnace charging equipment. An accommodating cavity is opened inside the guide plate 111. The cooling channel 112 is located in the accommodating cavity. The cooling channel 112 is provided with pipes 113 arranged at intervals along the length or width direction of the guide plate 111; or is provided with chambers separated and connected along the length or width direction of the guide plate 111; one end of the connecting component 120 is connected to the guide plate 111, and the other end of the connecting component 120 is used to connect to the corresponding driving arm 300 of the blast furnace charging equipment.
[0029] As attached Figure 1 and attached Figure 2 As shown, there are two driving arms 300 of the blast furnace charging equipment, and the two driving arms 300 are connected to the water-cooling assembly 110 through a corresponding set of connecting components 120. The water-cooling assembly 110 includes a guide plate 111 and a cooling channel 112, wherein the guide plate 111 is arranged at an angle to the driving arm 300, and the guide plate 111 is arranged below the driving arm 300. When the central coal gas flow flushes the blast furnace, the guide plate 111 can block the coal gas flow to prevent the central coal gas flow from directly flushing the driving arm 300. The guide plate 111 can reduce the temperature of the coal gas flow through the water-cooling assembly 110, thereby reducing the central temperature of the blast furnace empty area, reducing the flushing of the driving arm 300 by the high-temperature coal gas flow, and significantly improving the service life of the driving arm 300 and the charging equipment.
[0030] The driving arm 300 is connected to the guide plate 111 via the connecting assembly 120 . The connecting assembly 120 is easy to disassemble and replace, thereby achieving good economic benefits in blast furnace production and maintenance.
[0031] The cooling channel 112 is provided with pipes 113 spaced apart along the length or width direction of the guide plate 111; or is provided with spaced and connected chambers separated along the length or width direction of the guide plate 111, and the pipes 113 or chambers form a cooling path.
[0032] As attached Figure 1 and attached Figure 2As shown, the guide plate 111 can be annular in structure. In some embodiments, the guide plate 111 is a box-shaped structure. In this case, the two drive arms 300 are spaced apart along the length of the guide plate 111. In some embodiments, the guide plate 111 is composed of a shell and a refractory material. The shell is an entire box-shaped structure. The refractory material is cast on the outer surface of the entire shell, ensuring the high temperature resistance of the guide plate 111. The casting thickness of the refractory material is 60 to 100 mm. The thickness can be 60 mm, 65 mm, 72 mm, 79 mm, 83 mm, 86 mm, 91 mm, 97 mm, or 100 mm.
[0033] As attached Figure 1 and attached Figure 2 As shown, to facilitate the swinging of the distribution chute 200 connected to the drive arm 300, in some embodiments, the guide plate 111 is provided with an arcuate notch 114 in the direction of rotation of the distribution chute 200 of the blast furnace distribution equipment. In this case, the arcuate notch 114 is located on the side of the guide plate 111 that is closest to the direction of rotation of the distribution chute 200. The arcuate notch 114 in the guide plate 111 creates a clearance space to prevent the distribution chute 200 from colliding with the guide plate 111 during swinging.
[0034] As attached Figure 1 and attached Figure 3 As shown, to increase the flow area of the cooling channel 112, in some embodiments, the cooling channel 112 is formed in a serpentine structure along the length of the guide plate 111. After cooling water is passed through the cooling channel 112, the heat dissipation capacity of the guide plate 111 can be effectively enhanced, thereby increasing the service life of the guide plate 111 in high-temperature working environments.
[0035] As attached Figure 1 and attached Figure 3 As shown, in other embodiments, the cooling channel 112 forms a serpentine structure along the width direction of the guide plate 111. After cooling water is passed into the cooling channel 112, the heat dissipation capacity of the guide plate 111 can be effectively enhanced, thereby increasing the service life of the guide plate 111 under high-temperature working conditions.
[0036] As attached Figure 1 and attached Figure 3 As shown, in some embodiments, the inner diameter of the pipe 113 of the cooling channel 112 or the cooling channel 112 can be 40 to 70 mm, which can be 40 mm, 43 mm, 50 mm, 57 mm, 64 mm, 69 mm or 70 mm; the distance between the pipe 113 or the cooling channel 112 is 100 to 200 mm, which can be 100 mm, 121 mm, 148 mm, 162 mm, 173 mm, 187 mm, 191 mm or 200 mm.
[0037] As attached Figure 1 and attached Figure 3 As shown, in some embodiments, the water-cooling assembly 110 further includes an inlet water pipe 117 and an outlet water pipe 118 that are both connected to the cooling channel 112. Specifically, the inlet water pipe 117 and the outlet water pipe 118 provide an environment for cooling water to be injected into and out of the cooling channel 112. In certain embodiments, both the inlet water pipe 117 and the outlet water pipe 118 are metal hoses. When cooling water is passed through the metal hoses, they effectively enhance the heat dissipation capacity of the guide plate 111 and extend the service life of the guide plate 111 in high-temperature operating conditions. Furthermore, since the guide plate 111 will move with the distribution chute 200, both the inlet water pipe 117 and the outlet water pipe 118 are metal hoses, eliminating the need for a rigid connection. The metal hoses can twist with the movement of the guide plate 111.
[0038] As attached Figure 1 and attached Figure 3 As shown, in some embodiments, the water cooling assembly 110 further includes an inlet connector 115 and an outlet connector 116 disposed on the guide plate 111. An inlet water pipe 117 is detachably connected to the inlet connector 115, and an outlet water pipe 118 is detachably connected to the outlet connector 116. The inlet connector 115 and the outlet connector 116 are disposed on the guide plate 111. This facilitates communication between the guide plate 111 and the corresponding pipe 113 via the inlet connector 115 and the outlet connector 116, thereby creating a cooling environment for the cooling channel 112. In certain embodiments, the inlet water pipe 117 is detachably connected to the inlet connector 115, and the outlet water pipe 118 is detachably connected to the outlet connector 116. The inlet water pipe 117 and the inlet connector 115 can be threaded, and the outlet water pipe 118 and the outlet connector 116 can be threaded. It is convenient to disassemble and install the inlet water pipe 117 and the outlet water pipe 118. If the inlet water pipe 117 and the outlet water pipe 118 need to be maintained or replaced, the inlet water pipe 117 and the inlet joint 115 can be directly disassembled, and the outlet water pipe 118 and the outlet joint 116 can be disassembled.
[0039] As attached Figure 1 and attached Figure 3 As shown, in some embodiments, the connecting assembly 120 includes a suspension plate 121 connected to the guide plate 111. The suspension plate 121 is rotatably connected to the drive arm 300 and is disposed at an angle to the guide plate 111. In some embodiments, the suspension plate 121 is made of heat-resistant stainless steel. In other embodiments, to enhance the strength of the suspension plate 121, the outer side of the suspension plate 121 further includes reinforcing ribs.
[0040] As attached Figure 1 and attached Figure 3As shown, in some embodiments, the guide plate 111 further includes a connecting plate 122 connected to the suspension plate 121. The connecting plate 122 has a first connecting hole, and the suspension plate 121 has a second connecting hole corresponding to the first connecting hole. The suspension plate 121 and the connecting plate 122 are fixedly connected by fasteners that pass through the first and second connecting holes. In certain embodiments, the fasteners are a pin bolt 125 and a lock nut 124, both of which are made of heat-resistant stainless steel. The connecting plate 122 is also made of heat-resistant stainless steel.
[0041] As attached Figure 1 and attached Figure 2 As shown, in some embodiments, the connecting plate 122 is triangular in shape, and the long side of the connecting plate 122 is fixedly connected to the guide plate 111, which can be connected by welding. The first connecting hole is located on the side corresponding to the long side of the connecting plate 122. To further enhance the strength of the connecting plate 122, a reinforcing rib is provided on the outer side of the connecting plate 122. The reinforcing rib is arranged at an angle to the long side of the connecting plate 122. In some embodiments, two connecting plates 122 are provided to connect to the guide plate 111 on one side, and a mounting space for the connecting suspension plate 121 is provided between the two connecting plates 122. The two connecting plates 122 and the connecting suspension plate 121 are detachably connected.
[0042] As attached Figure 1 and attached Figure 2 As shown, the present application provides a second aspect, a blast furnace charging equipment, comprising two spaced-apart drive arms 300, the aforementioned gas flow guiding device 100, and a charging chute 200. The drive arms 300 are connected to a water-cooling assembly 110 via corresponding connecting assemblies 120; the charging chute 200 is installed between the two drive arms 300. During blast furnace operation, the guide plate 111 in the gas flow guiding device 100 can guide the gas flow to change its trajectory, preventing the high-temperature gas flow from directly impacting the charging equipment.
[0043] As attached Figure 1 and attached Figure 2 As shown, in some embodiments, the blast furnace charging equipment also includes a support shaft 210, a first mounting hole is provided on the side of the driving arm 300 close to the guide plate 111, and a second mounting hole is provided on the suspension plate 121 of the connecting assembly 120; both ends of the support shaft 210 pass through the corresponding first mounting hole and the second mounting hole in sequence and the suspension plate 121 is connected to the driving arm 300 by threaded fasteners.
[0044] As attached Figure 1 and attached Figure 2As shown, in some embodiments, the blast furnace charging equipment further includes a support shaft 210. A mounting hole is defined on the side of the drive arm 300 proximate to the guide plate 111. Both ends of the support shaft 210 extend through the corresponding mounting holes of the drive arm 300 and are rotatably connected via fasteners. In some embodiments, the drive arm 300 is integrally cast, with a mounting hole defined at the bottom thereof. The mounting hole and the support shaft 210 are provided with a clearance fit.
[0045] Through the above embodiments, the present application has the following beneficial effects or advantages:
[0046] 1) The present application can change the movement trajectory of the central gas flow of the blast furnace by arranging a water-cooling component under the driving arm. When the central gas flow of the blast furnace is flushing, the central gas flow can be prevented from directly flushing the driving arm. The guide plate can reduce the temperature of the gas flow through the water-cooling component, thereby reducing the central temperature of the blast furnace empty area, reducing the flushing of the driving arm by the high-temperature gas flow, reducing the wear of the distribution equipment, reducing the number of abnormal furnace conditions, and improving the service life of the driving arm and the distribution equipment.
[0047] 2) The driving arm of the present application is connected to the water-cooling assembly through a connecting assembly, and has a quick replacement function, which can be replaced online during the production process, saving maintenance time and achieving good economic benefits in blast furnace production and maintenance.
[0048] Although the preferred embodiments of the present application have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present application.
[0049] Obviously, those skilled in the art may make various changes and modifications to this application without departing from the spirit and scope of this application. Thus, if these modifications and variations of this application fall within the scope of the claims of this application and their equivalents, this application is intended to include these modifications and variations.
Claims
1. A gas flow guiding device, applied to blast furnace charging equipment, characterized in that: include: A water-cooling assembly comprising a guide plate and a cooling channel, wherein the guide plate is arranged at an angle to the drive arm of the blast furnace charging device, the guide plate has an internal accommodating cavity, the cooling channel is located in the accommodating cavity, and the cooling channel has pipes arranged at intervals along the length or width of the guide plate; or has chambers separated along the length or width of the guide plate and connected to each other; Two sets of connecting components, one end of the connecting component is connected to the guide plate, and the other end of the connecting component is used to connect the driving arm corresponding to the blast furnace distribution equipment.
2. The gas flow guiding device according to claim 1, characterized in that: The cooling channel forms a serpentine structure along the length direction or the width direction of the guide plate.
3. The gas flow guiding device according to claim 1, characterized in that: The guide plate is provided with an arc-shaped notch in the direction in which the distribution chute of the blast furnace distribution equipment rotates.
4. The coal gas flow guiding device according to any one of claims 1 to 3, characterized in that: The water cooling assembly further includes an inlet water pipe and an outlet water pipe both in communication with the cooling channel.
5. The gas flow guiding device according to claim 4, characterized in that: The water cooling assembly further includes an inlet joint and an outlet joint provided on the guide plate, the inlet water pipe is detachably connected to the inlet joint, and the outlet water pipe is detachably connected to the outlet joint.
6. The coal gas flow guiding device according to any one of claims 1 to 3, characterized in that: The connecting assembly includes a suspension plate connected to the guide plate, the suspension plate is rotatably connected to the driving arm, and the suspension plate is arranged at an angle to the guide plate.
7. The gas flow guiding device according to claim 6, characterized in that: The guide plate is also provided with a connecting plate connected to the suspension plate, the connecting plate is provided with a first connecting hole, the suspension plate is provided with a second connecting hole corresponding to the first connecting hole, and the suspension plate and the connecting plate are fixedly connected by fasteners passing through the first connecting hole and the second connecting hole.
8. The gas flow guiding device according to claim 7, characterized in that: The connecting plate is triangular in shape, the long side of the connecting plate is fixedly connected to the guide plate, and the first connecting hole is located on a side corresponding to the long side of the connecting plate.
9. A blast furnace charging equipment, characterized in that: include: two spaced-apart drive arms; The coal gas flow guiding device according to any one of claims 1 to 8, wherein the driving arm is connected to the water cooling assembly via the corresponding connecting assembly; The material distribution chute is installed between the two driving arms.
10. The blast furnace charge distribution equipment according to claim 9, characterized in that: The blast furnace charging equipment further includes a support shaft, a first mounting hole is provided on a side of the driving arm close to the guide plate, and a second mounting hole is provided on the suspension plate of the connecting assembly; Both ends of the support shaft pass through the corresponding first mounting hole and second mounting hole in sequence, and the suspension plate is connected to the driving arm through threaded fasteners.