A smoke collecting cover for a top-blown furnace residual electrode discharge port

Abstract

The utility model discloses a kind of for top-blown converter residual pole discharge port fume collecting hood, including the fume collecting cavity of bucket shape, fume collecting cavity top is connected with air collecting pipeline, and outer periphery is fixedly connected with installation component;Valve is equipped in the pipeline of one end of fume collecting pipeline close to fume collecting cavity, and other end is communicated with the negative pressure pipeline of factory;The top of installation component is maintenance platform, maintenance platform can also movably set maintenance ladder, and valve can be overhauled by moving maintenance ladder.The utility model is close-range high-efficiency residual pole discharge port overflow flue gas by bucket shape fume collecting cavity, effectively inhibits flue gas diffusion;With the air collecting pipeline of factory negative pressure pipeline intercommunication forms stable negative pressure suction force, improves fume collecting efficiency;Bottom is provided with high-temperature resistant shielding curtain, while realizing physical barrier reduces external air inhalation, reduces system energy consumption;Overall structure is reasonable, convenient to install and overhaul, can significantly improve working environment, guarantee personnel health, prolong equipment service life, satisfy environmental protection and efficient production requirement.

Description

Technical Field

[0001] This utility model relates to the field of top-blown furnace technology, specifically to a smoke hood for the residual electrode feeding port of a top-blown furnace. Background Technology

[0002] The residual electrode feeding port is a key connection structure that enables the residual electrode chute to connect with the furnace body during the top-blown furnace process of treating electrolytic residual electrodes. It is usually formed by welding a bottom hanging water jacket and a steel plate to form a rectangular channel, ensuring that the electrolytic residual electrodes can smoothly enter the top-blown furnace. It is an important process link to maintain the continuous and stable treatment of residual electrodes in the top-blown furnace.

[0003] However, in actual operation, the feed port frequently experiences flue gas overflow and even flashover, seriously affecting the working environment and equipment lifespan. The reasons for this are mainly multifaceted: Firstly, during full-load operation of the side-blown furnace, a sudden increase in siphon flow causes a violent instantaneous reaction between sulfides and oxides inside the furnace, generating a large amount of gas and causing a sudden increase in furnace pressure, which in turn forms backflow through the residual electrode feed port. Secondly, the operating conditions of the top-blown furnace are affected by fluctuations in copper matte grade—when the grade is below 74% and the unstable slag surface of the side-blown furnace—which easily leads to a large amount of cold copper matte entering the top-blown furnace, causing underblowing. To adjust the furnace... Furthermore, the need to significantly increase the air volume leads to increased airflow disturbance within the furnace. Simultaneously, adhesion easily occurs between the toothed water jacket of the rising flue and the throat, affecting the normal discharge of flue gas and further exacerbating negative pressure fluctuations within the furnace. This causes flue gas to escape from the relatively weakly sealed residual electrode discharge port. In addition, since the discharge port is located in the fifth-floor work area, backdraft and flame propagation not only worsen the on-site operating environment and release harmful fumes, posing a direct threat to the occupational health of workers, but also cause long-term thermal erosion and chemical corrosion to the feeding equipment, accelerating equipment aging, increasing the failure rate, and affecting production continuity and safety. Therefore, it is urgent to design a fume hood to solve the above problems.

[0004] It also features a residual electrode feeding port fume collection device adapted to high-temperature operating conditions to ensure personnel health, extend equipment service life, and meet the dual requirements of modern smelting processes for environmental protection and efficient operation. Summary of the Invention

[0005] In response to the aforementioned issues of flue gas overflow and fire escaping at the residual electrode discharge port of a top-blown furnace, this invention provides a fume hood for the residual electrode discharge port of a top-blown furnace that can effectively suppress flue gas overflow, has a good fume collection effect, and improves the quality of the working environment.

[0006] To achieve the above objectives, the technical solution of this utility model is as follows: A fume hood for the feed port of a top-blown furnace residual electrode includes a bucket-shaped fume collection chamber. The top of the fume collection chamber is connected to an air collection pipe, and an installation assembly is fixedly connected to its outer periphery. A valve is installed in one end of the air collection pipe near the fume collection chamber, and the other end is connected to the negative pressure pipe of the plant. The top of the installation assembly is a maintenance platform, and the maintenance platform can also be equipped with a movable maintenance ladder, which can be used to maintain the valve.

[0007] Furthermore, the installation assembly includes an annular connecting plate and a supporting back plate, wherein the top of the annular connecting plate is the maintenance platform; the annular connecting plate has a connecting hole in the middle, and the smoke collection chamber passes through the connecting hole and is welded for fixation; the top of both sides of the supporting back plate are respectively fixedly connected to support rods, and several bolt holes are provided in the middle; the top of the support rods is fixedly connected to the bottom surface of the annular connecting plate, and an inclined support rod is also provided between the supporting back plate and the support rods. During installation, the support back plate is first fixed to the pre-set mounting base around the feed port of the top-blown furnace through the bolt holes in its center. The inclined support rod is then fixed at an angle between the support back plate and the support rod to form a stable triangular support structure. Next, the annular connecting plate is placed on top of the support rod and fixed. Then, the smoke collection chamber is passed through the connecting holes of the annular connecting plate and welded to complete the overall installation of the smoke hood. After that, the air collection pipe at the top of the smoke hood is connected to the negative pressure pipe of the factory, and then it can be put into use. The welding and fixing of the annular connecting plate and the smoke collection chamber ensures the connection sealing and concentricity. The support back plate achieves flexible and reliable installation positioning through multiple bolt holes. The inclined support structure formed by the support rod and the inclined support rod significantly enhances the overall rigidity, effectively resists thermal deformation and operating vibration caused by high temperature, extends service life, and ensures long-term stable operation of the smoke hood in harsh environments.

[0008] Furthermore, a baffle plate is fixedly installed along the outer perimeter of the top of the annular connecting plate. The top of the annular connecting plate serves as a maintenance platform, and the baffle plate fixed to its outer perimeter forms a protective railing during maintenance operations, preventing personnel or tools from accidentally slipping and improving maintenance safety, while not affecting valve operation and smoke collection functions. The integrated design of the baffle plate and the maintenance platform achieves safety protection without the need for an additional independent platform. The structure is compact, saves space, and ensures operational safety in high-temperature and high-altitude environments.

[0009] Furthermore, a movable rail is fixedly installed on the air collection duct below the valve; a movable block is fixedly installed on the back of the maintenance ladder, and the movable block is movably mounted on the movable rail. By pushing the maintenance ladder to move the movable block along the movable rail, the maintenance ladder can be easily moved to directly below the valve or away from the work area, enabling access and operation of the valve at different angles. After maintenance is completed, the maintenance ladder can be returned to its original position. The cooperation between the movable rail and the movable block enables flexible movement and precise positioning of the maintenance ladder, significantly improving the convenience and operational safety of valve maintenance.

[0010] Furthermore, stops are connected to both sides of the movable rail to prevent the movable block from sliding off. The stops are fixedly installed on both sides of the movable rail to form a physical limit, preventing the movable block from leaving the rail during sliding, ensuring that the maintenance ladder moves safely and smoothly within a predetermined range, preventing the maintenance ladder from accidentally slipping or overturning, and enhancing the safety and reliability of the mobile maintenance process.

[0011] Furthermore, a high-temperature resistant shielding curtain is provided along the bottom edge of the smoke collection chamber. The shielding curtain provided along the bottom edge can adapt to high-temperature operating conditions, reducing the mixing of external air while achieving smoke isolation and collection, improving smoke collection efficiency and reducing the load during use.

[0012] How to use this utility model: The equipment connected to the factory's negative pressure pipeline is a dust removal device, such as a bag filter. First, the fume hood is installed above the residual electrode discharge port of the top-blown furnace and fixed in place by the mounting components, so that the bottom of the fume collection chamber is directly opposite the residual electrode discharge port. During operation, the valve in the fume collection pipeline is opened, so that the negative pressure generated by the factory's negative pressure pipeline acts on the inside of the fume collection chamber, forming a stable suction force, effectively capturing the overflowing flue gas, and sending the captured overflowing flue gas into the dust collector. Through the maintenance platform on the top of the mounting components and the movable maintenance ladder, the valve can be conveniently operated and maintained daily, ensuring the continuous and stable operation of the device.

[0013] Compared with the prior art, the present invention has the following advantages and beneficial effects: 1. This utility model captures the overflowing flue gas from the residual electrode discharge port at close range and efficiently through a bucket-shaped flue gas collection chamber, effectively suppressing the diffusion of flue gas; it forms a stable negative pressure suction force by means of a collection air duct connected to the factory's negative pressure pipeline, improving the flue gas collection efficiency; a high-temperature resistant shielding curtain is set at the bottom, which reduces the intake of external air while achieving physical isolation, thereby reducing system energy consumption; the overall structure is reasonable, easy to install and maintain, can significantly improve the working environment, protect personnel health, extend the service life of equipment, and meet the requirements of environmental protection and high-efficiency production.

[0014] 2. This utility model uses a ring-shaped connecting plate, a supporting back plate, a supporting rod, and an inclined supporting rod to form a stable installation assembly, improving the overall rigidity and resistance to deformation, and ensuring stable operation of the smoke hood under high-temperature and vibration environments; a baffle plate is set on the top of the ring-shaped connecting plate to form a safe maintenance platform, ensuring safety for high-altitude operations; a movable rail is set on the air collection duct, which, together with the movable block of the maintenance ladder and the side blocks, enables the maintenance ladder to slide flexibly and prevent detachment, facilitating valve operation and maintenance; a high-temperature resistant shielding curtain is set at the bottom of the smoke collection chamber, effectively blocking the overflow of smoke and reducing the mixing of cold air, thereby improving smoke collection efficiency. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0016] Figure 2 This is an enlarged schematic diagram of a partial structure of this utility model.

[0017] Attached image labels: Smoke collection chamber-1, air collection duct-2, installation components-3, annular connecting plate-31, enclosure plate-311, support back plate-32, support rod-321, diagonal support rod-322, valve-4, maintenance ladder-5, movable rail-61, movable block-62, stop block-63, shielding curtain-7. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings.

[0019] Example 1: A fume hood for the feed port of a top-blown furnace residual electrode includes a bucket-shaped fume collection chamber 1, with an air collection pipe 2 connected to the top of the fume collection chamber 1 and an installation assembly 3 fixedly connected to its outer periphery; a valve 4 is installed in the air collection pipe 2 near one end of the fume collection chamber 1, and the other end is connected to the negative pressure pipe of the plant; the top of the installation assembly 3 is a maintenance platform, and the maintenance platform can also be equipped with a movable maintenance ladder 5, which can be used to maintain the valve 4.

[0020] How to use this utility model: The equipment connected to the factory's negative pressure pipeline is a dust removal device, such as a bag filter. First, the fume hood is installed above the residual electrode discharge port of the top-blown furnace and fixed in place by the installation component 3, so that the bottom of the fume collection chamber 1 is directly opposite the residual electrode discharge port. During operation, the valve 4 inside the air collection pipeline 2 is opened, so that the negative pressure generated by the factory's negative pressure pipeline acts on the inside of the fume collection chamber 1, forming a stable suction force, effectively capturing the overflowing flue gas, and sending the captured overflowing flue gas into the dust collector. Through the maintenance platform on the top of the installation component 3 and the movable maintenance ladder 5, the valve 4 can be conveniently operated and maintained daily, ensuring the continuous and stable operation of the device.

[0021] Example 2: Unlike Example 1, the installation assembly 3 includes an annular connecting plate 31 and a supporting back plate 32, wherein the top of the annular connecting plate 31 is the maintenance platform; the annular connecting plate 31 has a connecting hole in the middle, and the smoke collection chamber 1 passes through the connecting hole and is welded for fixation; the top of both sides of the supporting back plate 32 are respectively fixedly connected to support rods 321, and several bolt holes are provided in the middle; the top of the support rods 321 is fixedly connected to the bottom surface of the annular connecting plate 31, and an inclined support rod 322 is also inclinedly arranged between the supporting back plate 32 and the support rods 321. During installation, the support back plate 32 is first fixed to the pre-set mounting base around the feed port of the top-blown furnace through the bolt holes in its middle. The inclined support rod 322 is then fixed at an angle between the support back plate 32 and the support rod 321 to form a stable triangular support structure. Then, the annular connecting plate 31 is placed on top of the support rod 321 and fixed. After that, the smoke collection chamber 1 is passed through the connecting hole of the annular connecting plate 31 and welded to complete the overall installation of the smoke hood. Then, the air collection pipe 2 at the top of the smoke hood is connected to the negative pressure pipe of the factory, and then it can be used. The welding and fixing of the annular connecting plate 31 and the smoke collection chamber 1 ensures the connection sealing and concentricity. The support back plate 32 achieves flexible and reliable installation positioning through multiple bolt holes. The inclined support structure formed by the support rod 321 and the inclined support rod 322 significantly enhances the overall rigidity, effectively resists thermal deformation and operating vibration caused by high temperature, extends service life, and ensures long-term stable operation of the smoke hood in harsh environments.

[0022] The bottom edge of the smoke collection chamber 1 is provided with a high-temperature resistant shielding curtain 7. The shielding curtain 7 provided at the bottom edge can adapt to high-temperature working conditions, and while achieving smoke isolation and collection, it reduces the mixing of external air, improves smoke collection efficiency, and reduces the load during use.

[0023] Example 3: The difference from Example 2 is that a baffle 311 is fixedly provided along the outer periphery of the top of the annular connecting plate 31. The top of the annular connecting plate 31 serves as a maintenance platform, and the baffle 311 fixed to its outer periphery forms a protective railing during maintenance operations to prevent personnel or tools from accidentally slipping, thereby improving maintenance safety. At the same time, it does not affect the operation of valve 4 or the smoke collection function. The baffle 311 and the maintenance platform are integrated into a single design, achieving safety protection without the need for an additional independent platform. The structure is compact, saves space, and ensures operational safety in high-temperature and high-altitude environments.

[0024] A movable rail 61 is fixedly installed on the air collection duct 2 below the valve 4; a movable block 62 is fixedly installed on the back of the maintenance ladder 5, and the movable block 62 is movably mounted on the movable rail 61. By pushing the maintenance ladder 5 to move the movable block 62 along the movable rail 61, the maintenance ladder 5 can be conveniently moved to directly below the valve 4 or moved away from the work area, enabling access and operation of the valve 4 at different angles. After maintenance is completed, the maintenance ladder 5 can be returned to its original position. The cooperation between the movable rail 61 and the movable block 62 enables the flexible movement and precise positioning of the maintenance ladder 5, significantly improving the convenience and operational safety of valve 4 maintenance.

[0025] The movable rail 61 is connected to two stops 63 on both sides to prevent the movable block 62 from sliding out. The stops 63 are fixedly installed on both sides of the movable rail 61 to form a physical limit, preventing the movable block 62 from leaving the rail during sliding, ensuring that the maintenance ladder 5 moves safely and smoothly within a predetermined range, preventing the maintenance ladder 5 from accidentally slipping or overturning, and enhancing the safety and reliability of the mobile maintenance process.

[0026] Numerous specific details are set forth in this specification. However, it will be understood that embodiments of this invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this specification.

[0027] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model.

Claims

1. A fume hood for the discharge port of a top-blown furnace residual electrode, characterized in that: It includes a bucket-shaped smoke collection chamber (1), the top of which is connected to an air collection pipe (2), and an installation component (3) is fixedly connected to its outer periphery; the air collection pipe (2) has a valve (4) inside one end near the smoke collection chamber (1), and the other end is connected to the negative pressure pipe of the factory; the top of the installation component (3) is a maintenance platform, and the maintenance platform can also be equipped with a maintenance ladder (5), and the valve (4) can be maintained by moving the maintenance ladder (5).

2. A fume hood for the feed inlet of a top-blown furnace residual electrode as described in claim 1, characterized in that: The installation assembly (3) includes an annular connecting plate (31) and a support back plate (32), wherein the top of the annular connecting plate (31) is the maintenance platform; the annular connecting plate (31) has a connecting hole in the middle, and the smoke collection chamber (1) passes through the connecting hole and is welded for fixation; the top of both sides of the support back plate (32) are respectively fixedly connected to support rods (321), and several bolt holes are provided in the middle; the top of the support rods (321) is fixedly connected to the bottom surface of the annular connecting plate (31), and an inclined support rod (322) is also inclinedly arranged between the support back plate (32) and the support rods (321).

3. A fume hood for the feed inlet of a top-blown furnace residual electrode as described in claim 2, characterized in that: The top of the annular connecting plate (31) is fixedly provided with a baffle plate (311) along the outer periphery.

4. A fume hood for the feed inlet of a top-blown furnace residual electrode as described in any one of claims 1-3, characterized in that: A movable rail (61) is fixedly installed on the air collection pipe (2) below the valve (4); a movable block (62) is fixedly installed on the back of the maintenance ladder (5), and the movable block (62) is movably installed on the movable rail (61).

5. A fume hood for the feed inlet of a top-blown furnace residual electrode as described in claim 4, characterized in that: The movable rail (61) is connected to two stops (63) on both sides to prevent the movable block (62) from sliding out.

6. A fume hood for the feed inlet of a top-blown furnace residual electrode as described in claim 1, characterized in that: The bottom of the smoke collection chamber (1) is provided with a high-temperature resistant shielding curtain (7) along the edge.

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