Low-loss underground electric furnace capable of recycling waste heat

Abstract

The utility model discloses a low-loss underground electric furnace capable of recycling waste heat, which belongs to the technical field of underground electric furnaces and comprises an underground electric furnace, the right side of the underground electric furnace is fixedly connected with a dust removal box, and the lower end of the front side of the dust removal box is fixedly connected with a storage assembly. The lower end of the left side of the storage assembly is connected with an inner cavity of the underground electric furnace through a connecting pipeline, and a motor is fixedly connected to the upper surface of the dust removal box. The output end of the motor is fixedly connected with a rotating shaft. According to the low-loss underground electric furnace capable of conducting waste heat recovery, by arranging the dust removal box and the filtering assembly, smoke at different positions in the dust removal box can be filtered, it is ensured that smoke flowing through the dust removal box is more comprehensively and meticulously purified, and the abrasion degree of smoke particles to all parts of the device is effectively reduced; and meanwhile, the overall dust removal efficiency is improved, so that the dust content of discharged flue gas is greatly reduced, and a stricter environmental protection standard can be met.

Description

Technical Field

[0001] This utility model relates to the field of underground electric furnace technology, specifically a low-loss underground electric furnace capable of waste heat recovery. Background Technology

[0002] Submerged arc reduction electric furnaces are key equipment in metallurgical engineering used to produce ferroalloys (such as ferrosilicon and ferromanganese), calcium carbide, and yellow phosphorus. They are large-scale resistance arc furnaces, characterized by inserting electrodes into the furnace charge layer for submerged arc operation, utilizing resistance heat and the electric arc to heat the ore for a reduction reaction. Low-loss waste heat recovery underground electric furnaces can achieve energy-saving goals through efficient heat exchange technology, cascade utilization of flue gas waste heat, optimized system sealing and insulation, and intelligent control and maintenance mechanisms. They are suitable for high-temperature industrial scenarios such as metallurgy and chemical industries. During electric furnace production, a large amount of dust-laden gas is generated. Direct entry of this dust-laden gas into the waste heat recovery device will affect its service life. The gas produced by the electric furnace often has high pressure, which also affects the service life of the waste heat recovery device and reduces its operating efficiency.

[0003] To overcome the above-mentioned defects, the prior art (Chinese patent application number CN213300877U, application date 2021-05-28) provides an electric furnace waste heat recovery device, which includes a buffer tank, a cooling tank, a water storage tank, an air inlet pipe, a water inlet pipe, an air outlet pipe, and a water pump. One end of the air inlet pipe is connected to the buffer tank, and the other end of the air inlet pipe is connected to the cooling tank. The water pump is connected to both the water storage tank and the cooling tank through the water inlet pipe. This electric furnace waste heat recovery device effectively prevents incomplete cooling by setting a cooling layer and a detection layer, and by controlling the solenoid valve with a thermal sensor. By setting a buffer tank, the gas achieves buffering through a sliding push plate and a buffer spring. By setting a second dust filter, convenient dust prevention is achieved.

[0004] Thorough filtration removes particulate matter from flue gas, preventing it from impacting critical components of waste heat recovery equipment, such as the inner walls of heat exchanger pipes, at high speeds. Long-term scouring by particulate matter can thin and perforate pipe walls, shortening equipment lifespan and increasing maintenance and replacement costs. Furthermore, if the aforementioned devices cannot ensure adequate filtration of the flue gas during operation, a large amount of particulate matter can cause wear and blockages to the waste heat recovery equipment, reducing heat exchange efficiency and directly leading to a decrease in recovered heat. A significant amount of usable waste heat is lost with the flue gas, increasing energy waste and ultimately resulting in a significant decline in the overall energy efficiency of the underground electric furnace. Utility Model Content

[0005] The purpose of this invention is to provide a low-loss underground electric furnace capable of waste heat recovery, in order to solve the problem mentioned in the background art that the flue gas cannot be adequately filtered, resulting in a large amount of particulate matter causing wear and blockage to the waste heat recovery equipment, reducing heat exchange efficiency, and directly leading to a reduction in the recovered heat. A large amount of originally usable waste heat is lost with the flue gas, thereby increasing energy waste and causing a significant decrease in the overall energy utilization efficiency of the underground electric furnace.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a low-loss underground electric furnace capable of waste heat recovery, comprising an underground electric furnace, a dust collector fixedly connected to the right side of the underground electric furnace, and a storage component fixedly connected to the lower front end of the dust collector, with the lower left end of the storage component connected to the inner cavity of the underground electric furnace via a connecting pipe; a motor fixedly connected to the upper surface of the dust collector; a rotating shaft fixedly connected to the output end of the motor, the rotating shaft being rotatably disposed inside the dust collector, and a connecting plate being disposed on the inner wall of the dust collector via a reciprocating swing assembly, with a transmission shaft rotatably disposed inside the connecting plate; an integrated water tank fixedly connected to the lower right end of the dust collector, and a fixing plate fixedly connected to the inner wall of the dust collector, with a limit rod fixedly connected to the upper surface of the fixing plate, and a filter component slidably connected through the limit rod; the filter component being slidably disposed inside the dust collector, and a smoke exhaust pipe fixedly connected to the upper surface of the storage component.

[0007] Preferably, a connecting rod is fixedly connected to the surface of the rotating shaft, and the connecting rod is rotatably disposed inside the dust collection box, and an upper protrusion is fixedly connected to the lower surface of the connecting rod near the end of the filter assembly.

[0008] Preferably, the upper protrusions are symmetrically distributed about the center of the connecting rod, a fixing post is fixedly connected to the surface of the filter assembly, and a lower protrusion is fixedly connected to the upper surface of the fixing post.

[0009] Preferably, the filter components are evenly distributed on the surface of the fixed column, the surface of the filter components is inclined, and a movable plate is fixedly connected to the end of the fixed column.

[0010] Preferably, a baffle is fixedly connected to the inner wall of the dust collection box, and a sliding rod is fixedly connected to the upper surface of the baffle. The sliding rod is slidably connected through the movable plate. Meanwhile, one end of a fixed spring is fixedly connected to the lower surface of the movable plate, and the other end of the fixed spring is fixedly connected to the baffle.

[0011] Preferably, a fixed gear is fixedly connected to the surface of the rotating shaft, and the fixed gear is a half-gear structure. The reciprocating oscillating assembly includes a connecting gear fixedly connected to the surface of the transmission shaft, and the connecting gear and the fixed gear are meshed.

[0012] Preferably, one end of a torsion spring is fixedly connected to the surface of the connecting gear, and the other end of the torsion spring is fixedly connected to the connecting plate. A nozzle is fixedly connected to the surface of the transmission shaft, and the nozzle is slidably disposed at the lower end of the connecting plate. At the same time, the surface of the nozzle is connected to the inner cavity of the integrated water tank through a connecting pipe that penetrates the outer wall of the connecting plate.

[0013] Compared with the prior art, the beneficial effects of this utility model are: the low-loss underground electric furnace capable of waste heat recovery adopts a novel structural design, the specific details of which are as follows:

[0014] This low-loss underground electric furnace, capable of waste heat recovery, is equipped with a dust collector and filter components. It can filter flue gas at different locations within the dust collector, ensuring that the flue gas flowing through the dust collector receives more comprehensive and meticulous purification treatment. This effectively reduces the wear and tear on various components of the device caused by smoke particles, thereby extending the service life of the device. At the same time, the overall dust removal efficiency is improved, resulting in a significant reduction in the dust content of the emitted flue gas, which can meet more stringent environmental protection standards.

[0015] Furthermore, it can reduce the accumulation of particulate matter on the filter components, maintain the good air permeability and filtration performance of the filter components, thereby ensuring the continuity and stability of the dust removal effect and improving the production efficiency of the equipment.

[0016] This low-loss underground electric furnace, capable of waste heat recovery, utilizes an integrated water tank and nozzles to ensure full contact between the water flow and high-temperature flue gas, significantly improving heat exchange efficiency. This not only ensures the continuity and stability of the waste heat recovery process but also reduces energy waste, thereby enhancing the overall energy utilization efficiency of the underground electric furnace system.

[0017] Furthermore, it can ensure that the waste heat recovery device operates within a suitable temperature range, improve waste heat recovery efficiency, reduce the underground electric furnace's dependence on external energy, and reduce the device's energy consumption.

[0018] (3) The low-loss underground electric furnace that can recover waste heat improves the stability of the device during operation by setting the connecting plate and the fixing plate, and can effectively avoid the failure caused by the relative displacement of each component, so that the impact force generated is evenly distributed inside the fixing plate and the connecting plate, thereby ensuring the efficient and stable operation of the device. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the connection structure between the underground electric furnace and the dust removal box of this utility model.

[0020] Figure 2 This is a schematic diagram of the connection structure between the storage component and the exhaust pipe of this utility model.

[0021] Figure 3This is a schematic diagram of the connection structure between the integrated water tank and the dust collector of this utility model.

[0022] Figure 4 This is a schematic diagram of the connection structure between the connecting rod and the upper protrusion of this utility model.

[0023] Figure 5 This is a schematic diagram of the connection structure between the fixed column and the lower protrusion of this utility model.

[0024] Figure 6 This is a schematic diagram of the connection structure between the rotating shaft and the fixed gear of this utility model.

[0025] Figure 7 This is a schematic diagram of the connection structure between the torsion spring and the connecting gear of this utility model.

[0026] In the diagram: 1. Underground electric furnace; 2. Dust collection box; 3. Storage component; 4. Smoke exhaust pipe; 5. Electric motor; 6. Rotating shaft; 7. Connecting rod; 8. Upper protrusion; 9. Fixing plate; 10. Limiting rod; 11. Fixing column; 12. Lower protrusion; 13. Filter component; 14. Moving plate; 15. Sliding rod; 16. Fixing spring; 17. Baffle; 18. Fixing gear; 19. Connecting plate; 20. Drive shaft; 21. Connecting gear; 22. Torsion spring; 23. Nozzle; 24. Integrated water tank. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Example 1: By using the fixed plate 9, the limiting rod 10, and the connecting plate 19, the stability of the device during operation is improved, and malfunctions caused by relative displacement of components are effectively avoided. Figures 1-2As shown: It includes an underground electric furnace 1, a dust collector 2 fixedly connected to the right side of the underground electric furnace 1, and a storage component 3 fixedly connected to the lower front end of the dust collector 2. The lower left end of the storage component 3 is connected to the inner cavity of the underground electric furnace 1 through a connecting pipe. At the same time, a motor 5 is fixedly connected to the upper surface of the dust collector 2, and a rotating shaft 6 is fixedly connected to the output end of the motor 5. The rotating shaft 6 is rotatably disposed inside the dust collector 2. A connecting plate 19 is provided on the inner wall of the dust collector 2 through a reciprocating swing component. A transmission shaft 20 is rotatably disposed inside the connecting plate 19. An integrated water tank 24 is fixedly connected to the lower right end of the dust collector 2, and a fixing plate 9 is fixedly connected to the inner wall of the dust collector 2. A limit rod 10 is fixedly connected to the upper surface of the fixing plate 9. A filter component 13 is slidably connected to the limit rod 10. The filter component 13 is slidably disposed inside the dust collector 2. A smoke exhaust pipe 4 is fixedly connected to the upper surface of the storage component 3.

[0029] Workers use a conveyor system to transport the inspected and qualified raw materials into the underground electric furnace 1. The materials are then heated using resistance heat generated by the current passing through them. During the heating and smelting process, chemical reactions and fuel combustion occur, producing a large amount of high-temperature flue gas (such as...). Figure 1 and Figure 2 As shown), the flue gas enters the dust collection box 2 through the pipe at the top of the underground electric furnace 1 (as shown). Figure 3 As shown, the filter can filter the flue gas at different locations within the dust collector 2, ensuring that the flue gas flowing through the dust collector 2 receives more comprehensive and detailed purification treatment. At this time, the operator starts the motor 5, causing the filter component 13 to slide back and forth in the dust collector 2. At the same time, the drive shaft 20 drives the end nozzle 23 to swing back and forth in the dust collector 2, which greatly improves the heat exchange efficiency. This not only ensures the continuity and stability of the waste heat recovery process, but also reduces energy waste. The pre-treated flue gas enters the storage component 3, thereby realizing the effective recovery and utilization of waste heat. At the same time, when all the monitoring indicators of the flue gas meet the national and local environmental emission standards, the flue gas can be discharged into the atmosphere through the exhaust pipe 4.

[0030] In Example 2, unlike Example 1, the filter assembly 13, baffle 17, and moving plate 14 are used to filter the flue gas at different locations within the dust collector 2, ensuring that the flue gas flowing through the dust collector 2 receives more comprehensive and detailed purification treatment. Figures 4-5As shown: A connecting rod 7 is fixedly connected to the surface of the rotating shaft 6, and the connecting rod 7 is rotatably set inside the dust collection box 2. An upper protrusion 8 is fixedly connected to the lower surface of the connecting rod 7 near the end of the filter assembly 13. The upper protrusion 8 is symmetrically distributed about the center of the connecting rod 7. A fixing column 11 is fixedly connected to the surface of the filter assembly 13, and a lower protrusion 12 is fixedly connected to the upper surface of the fixing column 11. The filter assemblies 13 are evenly distributed on the surface of the fixing column 11, and the surface of the filter assembly 13 is inclined. A moving plate 14 is fixedly connected to the end of the fixing column 11. A baffle 17 is fixedly connected to the inner wall of the dust collection box 2, and a sliding rod 15 is fixedly connected to the upper surface of the baffle 17. The sliding rod 15 slides through the moving plate 14. At the same time, one end of a fixing spring 16 is fixedly connected to the lower surface of the moving plate 14, and the other end of the fixing spring 16 is fixedly connected to the baffle 17.

[0031] When the motor 5 is working, it drives the output shaft 6 to rotate inside the dust collector 2, and the shaft 6 drives the connecting rod 7 on the surface to rotate inside the dust collector 2. When the upper protrusion 8 at the lower end of the connecting rod 7 contacts the lower protrusion 12 at the upper end of the fixed column 11, the upper protrusion 8 pushes the fixed column 11, and at the same time drives the filter assembly 13 on the surface of the fixed column 11 to slide on the surface of the limiting rod 10 (e.g., Figure 4 As shown), and causes the movable plate 14 at the end of the fixed column 11 to slide on the surface of the sliding rod 15, and drives the fixed spring 16 on the surface of the movable plate 14 to retract towards the surface of the baffle 17 (as shown). Figure 5 As shown, when the upper protrusion 8 moves away from the lower protrusion 12 at the upper end of the fixed column 11, the fixed spring 16 pushes the moving plate 14 at the end of the fixed column 11 to reset, thereby causing the fixed column 11 to drive the filter assembly 13 on the surface to slide back and forth inside the dust collection box 2. This can reduce the accumulation of particulate matter on the filter assembly 13, maintain the good air permeability and filtration performance of the filter assembly 13, thereby ensuring the continuity and stability of the dust removal effect and improving the production efficiency of the device.

[0032] In Example 3, unlike Example 2, the use of a drive shaft 20, connecting gear 21, and torsion spring 22 allows for sufficient contact between the water flow and the high-temperature flue gas, significantly improving heat exchange efficiency. Figures 6-7 As shown: A fixed gear 18 is fixedly connected to the surface of the rotating shaft 6, and the fixed gear 18 is a half gear structure. The reciprocating swing assembly includes a connecting gear 21 fixedly connected to the surface of the transmission shaft 20. The connecting gear 21 and the fixed gear 18 are meshed. One end of a torsion spring 22 is fixedly connected to the surface of the connecting gear 21, and the other end of the torsion spring 22 is fixedly connected to a connecting plate 19. A nozzle 23 is fixedly connected to the surface of the transmission shaft 20, and the nozzle 23 is slidably disposed at the lower end of the connecting plate 19. The surface of the nozzle 23 is connected to the inner cavity of the integrated water tank 24 through a connecting pipe that penetrates the outer wall of the connecting plate 19.

[0033] As the motor 5 drives the output shaft 6 to rotate inside the dust collector 2, the fixed gear 18 on the surface of the shaft 66 meshes with the connecting gear 21 on the surface of the transmission shaft 20, causing the transmission shaft 20 to rotate inside the connecting plate 19 (e.g., Figure 6 As shown), and while the drive shaft 20 rotates, the torsion spring 22 on the surface of the connecting gear 21 contracts towards the surface of the connecting plate 19, causing the nozzle 23 on the surface of the drive shaft 20 to swing inside the dust collection box 2. Because the fixed gear 18 is a half-gear structure, when the fixed gear 18 and the connecting gear 21 are not meshed, the torsion spring 22 recovers its deformation, causing the drive shaft 20 to rotate in the opposite direction, causing the nozzle 23 to swing back and forth (as shown). Figure 7 As shown in the figure, uniform spraying is achieved inside the dust collection box 2. At the same time, the nozzle 23 is connected to the inner cavity of the integrated water tank 24 through the pipe, and a water source is continuously provided during the spraying process to ensure that the water is evenly sprayed into the dust collection box 2 through the nozzle 23. This not only ensures the continuity and stability of the waste heat recovery process, but also reduces energy waste, thereby improving the energy utilization efficiency of the entire underground electric furnace 1 system.

[0034] The above is the entire working process of the device, and all contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A low-loss underground electric furnace capable of waste heat recovery, comprising an underground electric furnace (1), wherein a dust collection box (2) is fixedly connected to the right side of the underground electric furnace (1), and a storage component (3) is fixedly connected to the lower front end of the dust collection box (2), and the lower left end of the storage component (3) is connected to the inner cavity of the underground electric furnace (1) through a connecting pipe, and an electric motor (5) is fixedly connected to the upper surface of the dust collection box (2); Its features are: The output end of the motor (5) is fixedly connected to a rotating shaft (6), and the rotating shaft (6) is rotatably arranged inside the dust collector (2). The inner wall of the dust collector (2) is provided with a connecting plate (19) through a reciprocating swing assembly, and a transmission shaft (20) is rotatably arranged inside the connecting plate (19). The dust collector (2) is fixedly connected to the lower right side of the integrated water tank (24), and the inner wall of the dust collector (2) is fixedly connected to the fixing plate (9), and the upper surface of the fixing plate (9) is fixedly connected to the limiting rod (10), while the limiting rod (10) is slidably connected to the filter assembly (13). The filter assembly (13) is slidably disposed inside the dust collection box (2), and the upper surface of the storage assembly (3) is fixedly connected to the exhaust pipe (4).

2. The low-loss underground electric furnace capable of waste heat recovery according to claim 1, characterized in that: A connecting rod (7) is fixedly connected to the surface of the rotating shaft (6), and the connecting rod (7) is rotatably disposed inside the dust collection box (2), and an upper protrusion (8) is fixedly connected to the lower surface of the connecting rod (7) near the end of the filter assembly (13).

3. A low-loss underground electric furnace capable of waste heat recovery according to claim 2, characterized in that: The upper protrusion (8) is symmetrically distributed about the center of the connecting rod (7), and a fixing post (11) is fixedly connected to the surface of the filter assembly (13), and a lower protrusion (12) is fixedly connected to the upper surface of the fixing post (11).

4. A low-loss underground electric furnace capable of waste heat recovery according to claim 3, characterized in that: The filter components (13) are evenly distributed on the surface of the fixed column (11), and the surface of the filter components (13) is inclined. A movable plate (14) is fixedly connected to the end of the fixed column (11).

5. A low-loss underground electric furnace capable of waste heat recovery according to claim 4, characterized in that: The dust collector (2) is fixedly connected to a baffle (17) on its inner wall, and a sliding rod (15) is fixedly connected to the upper surface of the baffle (17). The sliding rod (15) is slidably connected to the moving plate (14). At the same time, one end of a fixing spring (16) is fixedly connected to the lower surface of the moving plate (14), and the other end of the fixing spring (16) is fixedly connected to the baffle (17).

6. A low-loss underground electric furnace capable of waste heat recovery according to claim 2, characterized in that: A fixed gear (18) is fixedly connected to the surface of the rotating shaft (6), and the fixed gear (18) is a half gear structure. The reciprocating swing assembly includes a connecting gear (21) fixedly connected to the surface of the transmission shaft (20), and the connecting gear (21) and the fixed gear (18) are meshed.

7. A low-loss underground electric furnace capable of waste heat recovery according to claim 6, characterized in that: One end of a torsion spring (22) is fixedly connected to the surface of the connecting gear (21), and the other end of the torsion spring (22) is fixedly connected to the connecting plate (19). A nozzle (23) is fixedly connected to the surface of the transmission shaft (20), and the nozzle (23) is slidably disposed at the lower end of the connecting plate (19). At the same time, the surface of the nozzle (23) is connected to the inner cavity of the integrated water tank (24) through a connecting pipe that penetrates the outer wall of the connecting plate (19).

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