Submerged arc furnace waste heat recovery device
Through the design of grid-type waste heat recovery pipes and curved pipes, combined with heat conducting sheets and insulation strips, the problem of heat loss in the waste heat recovery device of the submerged arc furnace is solved, efficient heat recovery and utilization is achieved, and energy consumption is reduced.
Patent Information
- Application Number
- CN202422681442.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-05
- Publication Date
- 2025-09-19
- Estimated Expiration
- 2034-11-05
AI Technical Summary
The waste heat recovery device of the submerged arc furnace suffers from heat loss during the heat transfer process, resulting in a reduced heat recovery rate.
The design of grid-type waste heat recovery pipes, curved pipes and interlaced heat exchange pipes, combined with heat conducting sheets and insulation strips, increases the heat contact area and reduces heat loss.
It improves the recovery efficiency and utilization rate of heat energy, reduces energy consumption, and achieves significant energy-saving and emission-reduction effects.
Smart Images
Figure CN223361114U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of waste heat recovery of submerged arc furnaces, in particular to a waste heat recovery device for submerged arc furnaces. Background Art
[0002] As a highly efficient energy recovery system, the core function of the submerged arc furnace waste heat recovery device is to capture and convert the waste heat released during the submerged arc furnace production process into reusable electricity or thermal energy. This system not only greatly improves energy efficiency and effectively reduces energy consumption and production costs for enterprises, but also plays a significant role in environmental protection by reducing thermal pollution and carbon emissions, contributing to the green, low-carbon and sustainable development path.
[0003] However, in actual applications, the waste heat recovery device of the electric arc furnace also faces challenges. In particular, during the heat transfer process between the waste heat recovery pipe and the heat exchange pipe, heat loss is inevitable due to the influence of various factors such as the pipe material, wall thickness, fluid flow rate, and the insulation performance of the surrounding environment, thereby affecting the overall heat recovery rate. Specifically, when the high-temperature waste heat medium flows through the recovery pipe and enters the heat exchanger, during the heat exchange process with the cold medium, if the thermal resistance of the pipe wall is high or the insulation effect of the surrounding environment is poor, a large amount of heat will be lost to the outside world, thereby reducing the heat recovery efficiency of the system. Utility Model Content
[0004] The main purpose of the utility model is to provide a waste heat recovery device for a submerged arc furnace, which can effectively solve the problems raised in the background technology.
[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:
[0006] A waste heat recovery device for a submerged arc furnace comprises a support frame, side pipes, an inlet pipe, and a waste heat recovery assembly. The waste heat recovery assembly is distributed in the upper and lower parts of the support frame. A first side pipe and a second side pipe are located on both sides of the support frame. The inlet pipe is installed at the upper end of the support frame and communicates with the first side pipe to achieve transmission.
[0007] A plurality of groups of grille-type waste heat recovery pipes are provided between the two waste heat recovery components. A single group of grille-type waste heat recovery pipes is in an "S" design. A curved pipe is provided on the single group of grille-type waste heat recovery pipes. The relatively arranged curved pipes form an interpenetrating hole, and an interpenetrating heat exchange pipe is inserted into the interpenetrating hole.
[0008] A heat conducting sheet and a heat insulating strip are provided between the interpenetrating heat exchange pipe and the arc-shaped pipe, and the heat conducting sheet transfers the heat of the arc-shaped pipe to the interpenetrating heat exchange pipe.
[0009] As a further preferred embodiment of the present invention, support feet are provided at the four corners of the lower end of the support frame, and the upper support tubes of the support feet extend to the top of the support frame, the support feet and the support frame are fixed by bolts, and the lower ends of the support feet are provided with anti-slip rubber gaskets;
[0010] As a further preferred embodiment of the present invention, the first side pipe and the second side pipe are designed in a "U" shape, and the first side pipe and the second side pipe are connected to the waste heat recovery component, and the waste heat recovery component is mounted on the support frame by bolts;
[0011] As a further preferred embodiment of the present invention, a cavity is formed between two adjacent groups of the grid-type waste heat recovery pipes, and a heat-insulating material is installed in the cavity. The grid-type waste heat recovery pipes and the arc-shaped pipes are designed as one piece.
[0012] As a further preferred embodiment of the present invention, the arc-shaped pipe is designed in a "C" shape, and the "C"-shaped arc-shaped pipe is symmetrically distributed on the pipe wall of the interpenetrating heat exchange pipe. The symmetrical arc-shaped pipe is designed in an elliptical shape and is adapted to the interpenetrating heat exchange pipe.
[0013] As a further preferred embodiment of the present invention, a plurality of the through holes are equidistantly distributed on the grid-type waste heat recovery pipe, and the pipe walls of the through heat exchange pipe, the first side pipe and the second side pipe are sheathed with thermal insulation material.
[0014] Compared with the prior art, the present invention has the following beneficial effects:
[0015] In this utility model, the waste heat recovery device for a submerged arc furnace achieves efficient heat recovery and utilization through the interaction of grid-type waste heat recovery pipes, curved pipes, and interlaced heat exchange pipes. Its unique design and ingenious layout not only increase the contact area for heat energy but also, through the assistance of heat conducting plates and insulation strips, ensure the efficiency and stability of heat transfer. Specifically, the "S"-shaped design of the grid-type waste heat recovery pipes allows the flue gas to change direction multiple times during flow, thereby extending the heat exchange time and improving heat recovery efficiency.
[0016] The curved pipes are symmetrically distributed in a "C" shape on the walls of the interpenetrating heat exchange pipes. This not only creates an aesthetically pleasing design but also allows for a tight connection with the interpenetrating heat exchange pipes through interpenetrating holes, further enhancing heat exchange efficiency. Furthermore, the use of insulation effectively reduces heat loss, allowing for greater heat recovery and utilization. The combined effect of these designs and measures enables this submerged arc furnace waste heat recovery device to significantly reduce energy consumption and improve energy efficiency in industrial production, making a significant contribution to energy conservation and emission reduction. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1It is a schematic diagram of the overall structure of the utility model;
[0018] Figure 2 This is a front view of the overall structure of the utility model;
[0019] Figure 3 This is a side view of the overall structure of the utility model;
[0020] Figure 4 This is a diagram showing the grid-type waste heat recovery pipe and the interpenetrating heat exchange pipe of the utility model;
[0021] Figure 5 for Figure 4 Enlarged schematic diagram of point A in the middle.
[0022] In the figure: 1. Support frame; 2. Support legs; 3. First side pipe; 4. Inlet pipe; 5. Waste heat recovery component; 6. Grid-type waste heat recovery pipe; 7. Interpenetrating heat exchange pipe; 8. Arc pipe; 9. Interpenetrating hole; 10. Second side pipe. DETAILED DESCRIPTION
[0023] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.
[0024] like Figure 1 - Figure 5 As shown, a specially designed waste heat recovery device for a submerged arc furnace comprises a stable support frame 1, flanked by a first side pipe 3 and a second side pipe 10. These are cleverly designed in a U-shape and positioned on either side of the support frame 1. An inlet pipe 4 is strategically installed at the top of the support frame 1, tightly connected to the first side pipe 3 to ensure smooth heat transfer.
[0025] Inside the support frame 1, crucial waste heat recovery components 5 are located at both the top and bottom. These components are securely bolted to the frame, ensuring efficient and stable recovery. Even more ingenious, multiple sets of grid-like waste heat recovery pipes 6 are strategically placed between the two waste heat recovery components 5. Each set of pipes exhibits a unique "S" shape, which not only increases the contact area of the heat energy but also improves heat recovery efficiency.
[0026] Each set of grid-type waste heat recovery pipes 6 is cleverly fitted with curved pipes 8. These curved pipes 8 are designed in a "C" shape and symmetrically distributed along the walls of the interpenetrating heat exchange pipes 7. This symmetrical elliptical design is not only aesthetically pleasing but also ensures a perfect fit with the interpenetrating heat exchange pipes 7. More crucially, interpenetrating holes 9 are formed between the opposing curved pipes 8. These holes cleverly accommodate the interpenetrating heat exchange pipes 7, enabling efficient heat transfer between the two.
[0027] To further improve heat exchange efficiency, a heat conducting sheet and insulation strips are provided between the interpenetrating heat exchange pipe 7 and the curved pipe 8. The heat conducting sheet is responsible for efficiently transferring heat from the curved pipe 8 to the interpenetrating heat exchange pipe 7, while the insulation strips provide good insulation and reduce heat loss.
[0028] Furthermore, sturdy support legs 2 are located at the four corners of the lower end of support frame 1. These legs not only provide stable support for the entire device but are also securely bolted to support frame 1. The upper support tubes of these legs cleverly extend to the top of support frame 1, enhancing overall stability. Furthermore, non-slip rubber pads are located at the lower ends of these legs, ensuring the device's safety and stability during operation.
[0029] Between two adjacent sets of grid-type waste heat recovery pipes 6, a cavity is cleverly created, filled with insulation material. This design not only improves the device's thermal insulation performance but also ensures efficient heat recovery. The integrated design of the grid-type waste heat recovery pipes 6 and the curved pipes 8 further enhances the overall heat recovery efficiency and stability of the device.
[0030] Insulation material is applied to the multiple through-holes 9, as well as to the walls of the interpenetrating heat exchange pipes 7, the first side pipe 3, and the second side pipe 10. This insulation effectively reduces heat loss and ensures that heat energy is efficiently transferred to where it is needed. Through its unique design and ingenious layout, this submerged arc furnace waste heat recovery device achieves efficient recovery and utilization of heat energy, contributing to energy conservation and emission reduction in industrial production.
[0031] Installation process: Check the integrity and quality of all components (interpenetrating heat exchange pipes 7, curved pipes 8, heat conducting sheets, insulation strips, etc.). Confirm that the support frame 1 and waste heat recovery assembly 5 are securely installed, and check the installation position of the grid-type waste heat recovery pipe 6.
[0032] Install the arc pipe 8 symmetrically in a "C" shape on the pipe wall of the grille-type waste heat recovery pipe 6 according to the design drawings. Ensure that the arc pipe 8 is installed flat and fits tightly with the grille-type waste heat recovery pipe 6. Use special tools to open the insertion hole 9 at the relative position of the arc pipe 8. For example, use a pry bar to expand the diameter of the insertion hole 9 at the arc pipe 8, and fill it with insulation material after expansion. Insert the interpenetrating heat exchange pipes 7 into the insertion holes 9 one by one to ensure that the insertion depth of the pipes is consistent and stable. Install a heat conducting plate between the interpenetrating heat exchange pipe 7 and the arc pipe 8 to ensure that the heat conducting plate is in close contact with both; install insulation strips at the insertion holes 9 and the pipe joints to reduce heat loss.
[0033] Conduct a comprehensive inspection of all installed components to ensure that nothing is missing or loose. Conduct preliminary commissioning to check the heat transfer efficiency and pipeline sealing to ensure the normal operation of the waste heat recovery device.
[0034] In Use: When the submerged arc furnace begins operation, the high-temperature flue gas generated enters the waste heat recovery device through the inlet pipe 4. The hot flue gas first enters the first side pipe 3 and then undergoes preliminary heat exchange through the grid-type waste heat recovery pipe 6. Within the grid-type waste heat recovery pipe 6, the hot flue gas efficiently exchanges heat with the curved pipes 8 and the interlaced heat exchange pipes 7, transferring heat energy to these pipes. The heat conducting fins accelerate the heat transfer process, ensuring that the heat energy is quickly and evenly distributed to the interlaced heat exchange pipes 7.
[0035] The heat energy in the interpenetrating heat exchange pipe 7 can be recovered through circulating water or other media and used for preheating raw materials, heating or other heat energy demand scenarios. Insulation materials reduce heat loss and ensure heat recovery efficiency. Regularly monitor the waste heat recovery device to check the operating status and heat exchange efficiency of each component. Perform regular maintenance and replace damaged parts to ensure long-term stable operation of the device. When the submerged arc furnace is shut down, close the flue gas inlet entering the pipe 4 to prevent external air from entering the waste heat recovery device and causing corrosion or damage. Clean and maintain the waste heat recovery device and prepare it for the next use.
[0036] The standard parts used in this utility model can all be purchased from the market, and special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the existing technology. The machinery, parts and equipment all adopt conventional models in the existing technology, and the electric fusion connection adopts the conventional connection method in the existing technology, which will not be described in detail here.
[0037] The above are only preferred specific implementation methods of the present invention, but the protection scope of the present invention is not limited to them. Any technician familiar with the technical field can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention within the technical scope disclosed by the present invention, and they should be covered by the protection scope of the present invention.
Claims
1. A waste heat recovery device for a submerged arc furnace, comprising a support frame (1), a side pipe and an inlet pipe (4) and a waste heat recovery assembly (5), wherein the waste heat recovery assembly (5) is distributed in the upper and lower parts of the support frame (1), a first side pipe (3) and a second side pipe (10) are located on both sides of the support frame (1), and the inlet pipe (4) is installed at the upper end of the support frame (1) and communicated with the first side pipe (3) to realize transmission, characterized in that: A plurality of groups of grid-type waste heat recovery pipes (6) are provided between the two waste heat recovery components (5), and a single group of grid-type waste heat recovery pipes (6) is in an "S" design. An arc-shaped pipe (8) is provided on the single group of grid-type waste heat recovery pipes (6), and the arc-shaped pipes (8) arranged opposite to each other form an interpenetrating hole (9), and an interpenetrating heat exchange pipe (7) is inserted into the interpenetrating hole (9); A heat conducting sheet and a heat insulating strip are provided between the interpenetrating heat exchange pipe (7) and the arc-shaped pipe (8), and the heat conducting sheet transfers heat from the arc-shaped pipe (8) to the interpenetrating heat exchange pipe (7).
2. The submerged arc furnace waste heat recovery device according to claim 1, characterized in that: Support legs (2) are provided at the four corners of the lower end of the support frame (1), and the upper end support tubes of the support legs (2) extend to the top of the support frame (1). The support legs (2) and the support frame (1) are fixed by bolts, and the lower ends of the support legs (2) are provided with anti-slip rubber pads.
3. The waste heat recovery device for a submerged arc furnace according to claim 2, characterized in that: The first side pipe (3) and the second side pipe (10) are designed in a "U" shape, and the first side pipe (3) and the second side pipe (10) are connected to the waste heat recovery component (5), and the waste heat recovery component (5) is mounted on the support frame (1) by bolts.
4. The waste heat recovery device for a submerged arc furnace according to claim 3, characterized in that: A cavity is formed between two adjacent groups of the grid-type waste heat recovery pipes (6), and a heat-insulating material is installed in the cavity. The grid-type waste heat recovery pipes (6) and the arc-shaped pipes (8) are designed as an integral whole.
5. The submerged arc furnace waste heat recovery device according to claim 4, characterized in that: The arc-shaped pipe (8) is designed in a "C" shape, and the "C"-shaped arc-shaped pipe (8) is symmetrically distributed on the pipe wall of the interpenetrating heat exchange pipe (7). The symmetrical arc-shaped pipe (8) is designed in an elliptical shape and is adapted to the interpenetrating heat exchange pipe (7).
6. The submerged arc furnace waste heat recovery device according to claim 5, characterized in that: The plurality of interpenetrating holes (9) are equidistantly distributed on the grid-type waste heat recovery pipe (6), and the pipe walls of the interpenetrating heat exchange pipe (7), the first side pipe (3), and the second side pipe (10) are sheathed with thermal insulation material.