Waste gas treatment device of metallurgical electric furnace

Abstract

The invention relates to the technical field of waste gas treatment, in particular to a metallurgical electric furnace waste gas treatment device which comprises a gas inlet chamber, a gas outlet chamber, purification pipes fixedly mounted between the gas inlet chamber and the gas outlet chamber and corona wires arranged in the purification pipes. A first spraying mechanism, a second spraying mechanism and a supporting frame are arranged in the air outlet chamber, the supporting frame is fixedly mounted in the air outlet chamber, a plurality of uniformly distributed mounting seats are fixedly mounted at the top of the supporting frame, and two flow guide plates and mounting brackets are arranged on the outer sides of the corona wires. An adjusting mechanism is arranged at one end of each mounting base, and a connecting mechanism and a pushing mechanism are arranged in each mounting support. The device has the beneficial effects that the problems that in the prior art, a spraying type spray head cannot effectively wash the corona wire, so that impurities outside the corona wire are gradually accumulated, discharge of the corona wire is inhibited, and the dust removal efficiency is reduced are solved.

Description

Technical Field

[0001] This invention relates to the field of waste gas treatment technology, specifically to a waste gas treatment device for a metallurgical electric furnace. Background Technology

[0002] Metallurgical electric furnaces (such as electric arc furnaces, induction furnaces, and submerged arc furnaces) generate waste gases containing dust, harmful gases, and heavy metals during the smelting process. These require multi-stage combined treatment devices to achieve compliant emissions. Some metallurgical electric furnaces (such as electric arc furnaces and induction furnaces) utilize wet electrostatic precipitators in the final stage of flue gas purification. These precipitators efficiently capture fine dust, preventing secondary dust re-entrainment and ensuring compliance with workshop operating conditions and waste gas emissions standards. Wet electrostatic precipitators primarily work by releasing charges through corona wires, causing dust particles to become negatively charged. These negatively charged dust particles are then driven by the electric field and adsorbed onto the positively charged inner wall of the purification tube. A spray system at the top of the wet electrostatic precipitator washes the purification tube and corona wires, preventing the formation of thick sludge from dust, sticky substances, and other impurities on the inner wall of the purification tube during prolonged operation. This prevents the buildup of sludge, which would otherwise impede airflow, hinder charge release, and cause a sharp decline in dust removal efficiency.

[0003] The spray system in a wet electrostatic precipitator typically uses spray nozzles. The water droplets sprayed from these nozzles are distributed downwards in a conical shape. For a vertical purification pipe, the water flow can effectively cover the entire pipe wall. However, for the corona wire, which is also vertically positioned and located in the center of the purification pipe, only a very small amount of water flows onto the corona wire. As a result, the water flow cannot effectively clean the corona wire. The small amount of impurities captured on the corona wire will gradually accumulate. Under long-term operation, this will inhibit the discharge of the corona wire, leading to a decrease in dust removal efficiency. Summary of the Invention

[0004] The purpose of this invention is to provide a waste gas treatment device for metallurgical electric furnaces to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a waste gas treatment device for a metallurgical electric furnace, comprising an inlet chamber, an outlet chamber, a purification pipe fixedly installed between the inlet chamber and the outlet chamber, and corona wires disposed inside multiple purification pipes. The outlet chamber is provided with a first spray mechanism, a second spray mechanism, and a support frame. The support frame is fixedly installed inside the outlet chamber. The tops of the multiple corona wires are all fixedly connected to the support frame. Multiple evenly distributed mounting seats are fixedly installed on the top of the support frame. Two guide plates and mounting brackets are provided on the outer sides of the multiple corona wires. An adjustment mechanism is provided at one end of each of the multiple mounting seats. A connecting mechanism and a pushing mechanism are provided in each of the multiple mounting brackets.

[0006] Preferably, the first spraying mechanism includes a spray pipe and a plurality of spray nozzles. The spray pipe is fixedly installed inside the air outlet chamber, and the plurality of spray nozzles are fixedly installed at the bottom of the spray pipe. A water injection pipe is connected to one side of the spray pipe.

[0007] Preferably, the second spraying mechanism includes multiple spray pipes II, with two flexible hoses connecting each adjacent spray pipe II. Multiple evenly distributed clustered nozzles are connected to one side of each of the multiple spray pipes II, and a water injection pipe II is connected to one side of one of the spray pipes II. The multiple clustered nozzles correspond to multiple corona wires respectively. Grooves are provided at both ends of the multiple mounting bases, and both ends of the multiple spray pipes II are fixedly installed in their respective grooves by bolts.

[0008] Preferably, the adjusting mechanism includes a threaded rod and a limiting rod. The threaded rod is rotatably installed at one end inside the corresponding mounting base, and the limiting rod is fixedly installed at one end inside the corresponding mounting base near the threaded rod. A bearing block is threadedly connected to the outside of the threaded rod. The end of the bearing block away from the threaded rod is slidably sleeved on the outside of the limiting rod. Multiple evenly distributed L-shaped top plates are fixedly installed at the bottom of the bearing block.

[0009] Preferably, the connecting mechanism includes a threaded rod II, a threaded connecting hole, and a limiting bracket. The threaded rod II is threadedly connected to one end of the top of the mounting bracket. The threaded connecting hole is opened in the support frame and cooperates with the threaded rod II. A transmission bracket is rotatably sleeved on the outside of one end of the threaded rod II. A transmission rod is fixedly installed at the bottom of the transmission bracket. The limiting bracket is rotatably installed inside the mounting bracket. A strip groove is opened at one end of the limiting bracket, and the transmission rod is disposed inside the strip groove.

[0010] Preferably, four positioning blocks are fixedly installed on one side of the top of each of the multiple mounting brackets, and multiple positioning slots are provided on the top and bottom of the support frame, with each of the multiple positioning slots cooperating with its corresponding positioning block.

[0011] Preferably, the pushing mechanism includes two guide rods and a transmission assembly. The two guide rods are fixedly installed inside the corresponding mounting brackets. The two ends of the two guide rods are slidably fitted with mounting side plates. The ends of the two mounting side plates away from the guide rods are respectively fixedly connected to their respective guide plates. Springs are fitted on the outside of one end of each of the two guide rods. Multiple L-shaped top plates and multiple limiting brackets cooperate with their respective mounting side plates.

[0012] Preferably, the transmission assembly includes a flip plate and four slide grooves. The flip plate is rotatably installed inside the mounting bracket. Sliding plates are rotatably installed at both ends of the flip plate. The four slide grooves are symmetrically opened in two groups at both ends of the two mounting side plates. Two sliders are fixedly installed on the side of the two sliding plates that are far apart from each other. The four sliders are slidably disposed inside their respective slide grooves.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] 1. By setting up a second spray mechanism and two guide plates on the outside of each corona wire, the cleaning water sprayed from the cluster nozzles in the second spray mechanism flows between the two guide plates. The water flow covers the outside of multiple corona wires and flows vertically downwards, effectively washing away impurities on the outside of the multiple corona wires. This solves the problem in the prior art that the spray nozzles cannot effectively wash away the corona wires, resulting in the gradual accumulation of impurities on the outside of the corona wires, inhibiting the discharge of the corona wires, and reducing the dust removal efficiency.

[0015] 2. By having each corona wire's outer mounting bracket exist independently, and the mounting bracket and support frame are detachably connected, when replacing a corona wire, the corresponding mounting bracket and guide plate can be quickly disassembled without disassembling multiple mounting brackets, making overall installation and disassembly convenient.

[0016] 3. By using the transmission bracket, transmission rod, limit bracket and strip groove, the limit bracket is used to limit the corresponding mounting side plate, so as to avoid the mounting bracket accidentally touching one of the mounting side plates during the installation of the support frame, causing the two guide plates to get close to each other and not be able to be properly fitted outside the corresponding corona wire. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0018] Figure 2 This is a schematic diagram of the internal structure of the air outlet chamber of the present invention;

[0019] Figure 3 This is a partial structural diagram of the present invention;

[0020] Figure 4 This is a schematic diagram of the support frame and its top assembly structure of the present invention;

[0021] Figure 5 This is a schematic diagram of the support frame and one of the mounting base structures of the present invention;

[0022] Figure 6 for Figure 5 Enlarged view of point A in the image;

[0023] Figure 7 This is a schematic diagram of the mounting base and multiple mounting brackets of the present invention;

[0024] Figure 8 This is a schematic diagram of the mounting base structure of the present invention;

[0025] Figure 9 This is a partial structural diagram of the spray mechanism of the present invention;

[0026] Figure 10 This is a schematic diagram of the mounting bracket and the combined structure of the two guide plates of the present invention;

[0027] Figure 11 This is a schematic diagram of the two guide vanes structure of the present invention;

[0028] Figure 12 This is a schematic diagram of the connection mechanism structure of the present invention;

[0029] Figure 13 This is a schematic diagram of the mounting bracket structure of the present invention.

[0030] The attached diagram lists the components represented by each number as follows:

[0031] 1. Air inlet chamber; 2. Air outlet chamber; 3. Purification pipe; 4. Corona wire; 5. Spray pipe one; 6. Spray nozzle; 7. Spray pipe two; 8. Hose; 9. Cluster nozzle; 10. Water injection pipe two; 11. Support frame; 12. Mounting base; 13. Groove; 14. Guide plate; 15. Mounting bracket; 16. Threaded rod one; 17. Limiting rod; 18. Bearing block; 19. L-shaped top plate; 20. Threaded rod two; 21. Threaded connection hole; 22. Transmission bracket; 23. Transmission rod; 24. Limiting bracket; 25. Strip groove; 26. Positioning insert; 27. Positioning slot; 28. Guide rod; 29. ​​Mounting side plate; 30. Spring; 31. Flip plate; 32. Sliding plate; 33. Slide groove; 34. Sliding block; 35. Water injection pipe one. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] This invention provides a technical solution: such as Figure 1 - Figure 13The exhaust gas treatment device for a metallurgical electric furnace shown includes an inlet chamber 1, an outlet chamber 2, a purification pipe 3 fixedly installed between the inlet chamber 1 and the outlet chamber 2, and corona wires 4 disposed inside multiple purification pipes 3. The outlet chamber 2 is provided with a first spray mechanism, a second spray mechanism, and a support frame 11. The support frame 11 is fixedly installed inside the outlet chamber 2. The tops of the multiple corona wires 4 are all fixedly connected to the support frame 11. Multiple evenly distributed mounting seats 12 are fixedly installed on the top of the support frame 11. Two guide plates 14 and mounting brackets 15 are provided on the outer sides of the multiple corona wires 4. An adjustment mechanism is provided at one end of each of the multiple mounting seats 12. A connecting mechanism and a pushing mechanism are provided in each of the multiple mounting brackets 15.

[0034] The first spraying mechanism includes a spray pipe 5 and multiple spray nozzles 6. The spray pipe 5 is fixedly installed inside the air outlet chamber 2, and the multiple spray nozzles 6 are fixedly installed at the bottom of the spray pipe 5. A water injection pipe 35 is connected to one side of the spray pipe 5.

[0035] The second spraying mechanism includes multiple spray pipes 7, with two flexible hoses 8 connecting each adjacent spray pipe 7. Multiple evenly distributed cluster nozzles 9 are connected to one side of each spray pipe 7. One side of one spray pipe 7 is connected to a water injection pipe 10. The multiple cluster nozzles 9 correspond to multiple corona wires 4. Both ends of multiple mounting bases 12 are provided with grooves 13. Both ends of the multiple spray pipes 7 are fixedly installed in their respective grooves 13 by bolts.

[0036] The adjustment mechanism includes a threaded rod 16 and a limiting rod 17. The threaded rod 16 is rotatably installed at one end inside the corresponding mounting base 12. The limiting rod 17 is fixedly installed at the end of the corresponding mounting base 12 near the threaded rod 16. A bearing block 18 is threadedly connected to the outside of the threaded rod 16. The end of the bearing block 18 away from the threaded rod 16 is slidably sleeved on the outside of the limiting rod 17. Multiple evenly distributed L-shaped top plates 19 are fixedly installed at the bottom of the bearing block 18.

[0037] The connecting mechanism includes a threaded rod 20, a threaded connection hole 21, and a limiting bracket 24. The threaded rod 20 is threadedly connected to one end of the top of the mounting bracket 15. The threaded connection hole 21 is opened in the support frame 11. The threaded connection hole 21 and the threaded rod 20 cooperate with each other. A transmission bracket 22 is rotatably sleeved on the outside of one end of the threaded rod 20. A transmission rod 23 is fixedly installed at the bottom of the transmission bracket 22. The limiting bracket 24 is rotatably installed inside the mounting bracket 15. A strip groove 25 is opened at one end of the limiting bracket 24. The transmission rod 23 is set inside the strip groove 25.

[0038] Each of the multiple mounting brackets 15 has four positioning blocks 26 fixedly installed on one side of its top. The top and bottom of the support frame 11 are provided with multiple positioning slots 27, which cooperate with their respective positioning blocks 26.

[0039] The driving mechanism includes two guide rods 28 and a transmission assembly. Both guide rods 28 are fixedly installed inside the corresponding mounting brackets 15. Both ends of the two guide rods 28 are slidably fitted with mounting side plates 29. The ends of the two mounting side plates 29 away from the guide rods 28 are respectively fixedly connected to their respective guide plates 14. Springs 30 are fitted on the outside of one end of each of the two guide rods 28. Multiple L-shaped top plates 19 and multiple limiting brackets 24 cooperate with their respective mounting side plates 29.

[0040] The transmission assembly includes a flip plate 31 and four slide grooves 33. The flip plate 31 is rotatably mounted inside the mounting bracket 15. Sliding plates 32 are rotatably mounted at both ends of the flip plate 31. The four slide grooves 33 are symmetrically opened in two groups at both ends of the two mounting side plates 29. Two sliders 34 are fixedly mounted on the side of the two sliding plates 32 that are far apart from each other. The four sliders 34 are slidably disposed inside their respective slide grooves 33.

[0041] Working principle: When in use, first fix the multiple spray pipes 2 7 into the corresponding mounting base 12. When installing one of the spray pipes 2 7, simply place both ends of the spray pipe 2 7 into the grooves 13 at both ends of the corresponding mounting base 12, and then fix it with bolts. The installation process of the other multiple spray pipes 2 7 is the same as above.

[0042] Subsequently, two guide plates 14 are installed on the outside of the multiple corona wires 4. The installation process of the two guide plates 14 and the corresponding mounting brackets 15 is as follows: First, the four positioning blocks 26 on one side of the mounting bracket 15 are inserted into their respective positioning slots 27. Then, the threaded rod 20 is rotated to screw it into the threaded connection hole 21, thus fixing the mounting bracket 15. During the rotation of the threaded rod 20, the transmission bracket 22 and the transmission rod 23 move synchronously. The transmission rod 23 moves inside the strip groove 25, thereby causing the limiting bracket 24 to rotate. The mounting side plate 29 corresponding to the limiting bracket 24 is no longer limited by the limiting bracket 24. The mounting bracket 15 is then fixed to the support frame 1. Previously, the transmission bracket 22, transmission rod 23, limiting bracket 24, and strip groove 25 were used to limit the corresponding mounting side plate 29 by using the limiting bracket 24. This prevented the mounting bracket 15 from accidentally touching one of the mounting side plates 29 during the installation of the support frame 11, which would cause the two guide plates 14 to get close to each other and not be able to fit properly outside the corresponding corona wire 4. Only when the mounting bracket 15 is fixed to the support frame 11, that is, when the threaded rod 20 is rotated into the threaded connection hole 21, are the two guide plates 14 located outside the corresponding corona wire 4, and the limitation on the mounting side plate 29 can be released. The installation process of other mounting brackets 15 and support frame 11 is the same as described above.

[0043] After all the mounting brackets 15 are installed, rotate the threaded rods 16 one by one. Under the action of their respective limit rods 17, the multiple bearing blocks 18 move, which in turn drives the multiple L-shaped top plates 19 at their bottom to move. The multiple L-shaped top plates 19 push their respective mounting side plates 29 to move. At this time, the multiple flip plates 31 drive the sliding plates 32 at both ends to move. The two sliders 34 on one side of the multiple sliding plates 32 slide in their respective sliding grooves 33. The two adjacent mounting side plates 29 drive their respective guide plates 14 to move closer to each other, and the corresponding springs 30 are compressed. At this point, the guide plates 14 and mounting brackets 15 outside the multiple corona wires 4 are all installed.

[0044] During waste gas treatment, the waste gas is first introduced into the inlet chamber 1, then into multiple purification pipes 3. Multiple corona wires 4 release their charge, causing the dust particles in the waste gas to become negatively charged. These negatively charged dust particles are driven by the electric field and adsorbed onto the positively charged inner walls of the purification pipes 3. The purified gas is then discharged into the outlet chamber 2. During the rinsing of the inner walls of the purification pipes 3, cleaning water is injected into the water injection pipe 35. The cleaning water flows into the spray pipe 5 and is finally sprayed out through the spray nozzles 6, covering the walls of the purification pipes 3 for rinsing. During the rinsing of the corona wires 4, cleaning water is injected into the water injection pipe 10. The cleaning water flows through multiple hoses 8 into the spray pipe 7. Finally... Multiple cluster nozzles 9 spray water between two adjacent guide plates 14, and the water flow covers the outside of multiple corona wires 4, flowing vertically downwards. This effectively washes away impurities on the outside of the corona wires 4, thus solving the problem in the prior art where spray nozzles 6 cannot effectively wash away the corona wires 4, leading to the gradual accumulation of impurities on the outside of the corona wires 4, inhibiting the discharge of the corona wires 4, and reducing dust removal efficiency. At the same time, the mounting brackets 15 on the outside of each corona wire 4 are independent, and the mounting brackets 15 are detachably connected to the support frame 11. When replacing a corona wire 4, the corresponding mounting bracket 15 and guide plate 14 can be quickly disassembled without disassembling multiple mounting brackets 15. The overall installation and disassembly are convenient.

[0045] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0046] Although embodiments of the 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 invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A waste gas treatment device for a metallurgical electric furnace, comprising an inlet chamber (1), an outlet chamber (2), a purification pipe (3) fixedly installed between the inlet chamber (1) and the outlet chamber (2), and corona wires (4) disposed inside multiple purification pipes (3), characterized in that: The air outlet chamber (2) is provided with a first spray mechanism, a second spray mechanism and a support frame (11). The support frame (11) is fixedly installed inside the air outlet chamber (2). The tops of the multiple corona wires (4) are fixedly connected to the support frame (11). The top of the support frame (11) is fixedly installed with multiple evenly distributed mounting seats (12). The outer sides of the multiple corona wires (4) are provided with two guide plates (14) and mounting brackets (15). One end of each of the multiple mounting seats (12) is provided with an adjustment mechanism. Each of the multiple mounting brackets (15) is provided with a connecting mechanism and a pushing mechanism.

2. The waste gas treatment device for a metallurgical electric furnace according to claim 1, characterized in that: The first spraying mechanism includes a spray pipe (5) and multiple spray nozzles (6). The spray pipe (5) is fixedly installed inside the air outlet chamber (2), and the multiple spray nozzles (6) are fixedly installed at the bottom of the spray pipe (5). A water injection pipe (35) is connected to one side of the spray pipe (5).

3. The waste gas treatment device for a metallurgical electric furnace according to claim 1, characterized in that: The second spraying mechanism includes multiple spray pipes (7), and two hoses (8) are connected between two adjacent spray pipes (7). Multiple evenly distributed cluster nozzles (9) are connected to one side of each spray pipe (7). One side of one spray pipe (7) is connected to a water injection pipe (10). The multiple cluster nozzles (9) correspond to multiple corona wires (4). Both ends of the multiple mounting bases (12) are provided with grooves (13). Both ends of the multiple spray pipes (7) are fixedly installed in their respective grooves (13) by bolts.

4. The waste gas treatment device for a metallurgical electric furnace according to claim 1, characterized in that: The adjustment mechanism includes a threaded rod (16) and a limiting rod (17). The threaded rod (16) is rotatably installed at one end inside the corresponding mounting base (12). The limiting rod (17) is fixedly installed at one end inside the corresponding mounting base (12) near the threaded rod (16). The threaded rod (16) is externally threaded with a bearing block (18). The end of the bearing block (18) away from the threaded rod (16) is slidably sleeved on the outside of the limiting rod (17). The bottom of the bearing block (18) is fixedly installed with multiple evenly distributed L-shaped top plates (19).

5. The waste gas treatment device for a metallurgical electric furnace according to claim 4, characterized in that: The connecting mechanism includes a threaded rod (20), a threaded connecting hole (21), and a limiting bracket (24). The threaded rod (20) is threadedly connected to one end of the top of the mounting bracket (15). The threaded connecting hole (21) is opened in the support frame (11). The threaded connecting hole (21) and the threaded rod (20) cooperate with each other. A transmission bracket (22) is rotatably sleeved on the outside of one end of the threaded rod (20). A transmission rod (23) is fixedly installed at the bottom of the transmission bracket (22). The limiting bracket (24) is rotatably installed inside the mounting bracket (15). A strip groove (25) is opened at one end of the limiting bracket (24). The transmission rod (23) is set inside the strip groove (25).

6. The waste gas treatment device for a metallurgical electric furnace according to claim 1, characterized in that: Four positioning blocks (26) are fixedly installed on one side of the top of each of the mounting brackets (15). Multiple positioning slots (27) are provided on the top and bottom of the support frame (11). The multiple positioning slots (27) cooperate with their respective positioning blocks (26).

7. The waste gas treatment device for a metallurgical electric furnace according to claim 5, characterized in that: The pushing mechanism includes two guide rods (28) and a transmission assembly. The two guide rods (28) are fixedly installed inside the corresponding mounting brackets (15). The two ends of the two guide rods (28) are slidably fitted with mounting side plates (29). The ends of the two mounting side plates (29) away from the guide rods (28) are respectively fixedly connected to their respective guide plates (14). The outer ends of the two guide rods (28) are fitted with springs (30). Multiple L-shaped top plates (19) and multiple limiting brackets (24) cooperate with their respective mounting side plates (29).

8. The waste gas treatment device for a metallurgical electric furnace according to claim 7, characterized in that: The transmission assembly includes a flip plate (31) and four slide grooves (33). The flip plate (31) is rotatably installed inside the mounting bracket (15). Sliding plates (32) are rotatably installed at both ends of the flip plate (31). The four slide grooves (33) are symmetrically opened in two groups at both ends of the two mounting side plates (29). Two sliders (34) are fixedly installed on the side of the two sliding plates (32) that are far apart from each other. The four sliders (34) are slidably arranged inside their respective slide grooves (33).

Images