Metallurgy flue gas dust filtering and purifying device

Abstract

The utility model discloses a metallurgical flue gas dust filtering and purifying device which comprises a purifying box, one side of the purifying box is connected with a conical gas inlet structure, the other side of the purifying box is connected with a conical gas outlet structure, a fixing box is fixed on one side in the purifying box, a fixing frame is fixed in the fixing box, and the conical gas inlet structure is connected with a conical gas outlet structure. A vibration mechanism is installed on the fixing frame, a moving block is installed on the vibration mechanism, a bearing frame is fixed to one side of the moving block, and a stainless steel wedge-shaped wire mesh, a nickel-based sintered felt mesh and a PTFE film-coated glass fiber mesh are installed on the bearing frame at equal intervals. According to the utility model, the contact area and range of the gas and the filter screen during conveying can be increased, the filtering efficiency is improved, the cost and the maintenance workload of frequently replacing the filter screen due to blockage of the filter screen are reduced, the reliability and the stability of the whole device are improved, and in addition, the efficiency and the quality of the whole filtering and purifying process are improved through gas conveying in a flowing form.

Description

Technical Field

[0001] This utility model relates to the field of metallurgical flue gas dust filtration technology, and in particular to a metallurgical flue gas dust filtration and purification device. Background Technology

[0002] The metallurgical industry generates large amounts of flue gas during production, characterized by high particulate matter concentration and easily caking sticky dust. Direct emission into the atmosphere not only severely pollutes the environment but also harms human health. Currently, after cooling and dust removal, metallurgical flue gas requires filtration to further remove fine dust and harmful substances. However, conventional filters often have a fixed structure, which easily becomes clogged as flue gas passes through, significantly reducing filtration efficiency and requiring frequent filter replacements, increasing operating costs and maintenance workload. Therefore, we propose a metallurgical flue gas dust filtration and purification device to address these problems. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of existing technologies by proposing a metallurgical flue gas dust filtration and purification device.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A metallurgical flue gas dust filtration and purification device includes a purification box, a conical air inlet structure connected to one side of the purification box, a conical air outlet structure connected to the other side of the purification box, a fixed box fixed to one side inside the purification box, a fixed frame fixed inside the fixed box, a vibration mechanism installed on the fixed frame, a moving block installed on the vibration mechanism, a support frame fixed to one side of the moving block, and stainless steel wedge wire mesh, nickel-based sintered felt mesh and PTFE-coated fiberglass mesh installed at equal intervals on the support frame.

[0006] Preferably, the conical air intake structure includes a conical air intake hood installed on one side of the purification chamber, with spiral guide plates evenly spaced on the inner side wall of the conical air intake hood, an air intake pipe connected to one end of the conical air intake hood, and one end of the conical air intake hood corresponding to a stainless steel wedge-shaped wire mesh.

[0007] Preferably, the conical air outlet structure includes a conical air outlet hood installed on the other side of the purification chamber, and the conical air outlet hood corresponds to the PTFE-coated fiberglass mesh.

[0008] Preferably, the vibration mechanism includes a vibration motor mounted on the upper end of the fixed frame, two pull rods connected to the lower end of the vibration motor, a movable plate rotatably connected to the lower end of the pull rods, multiple second sliders fixed on both sides of the movable plate, a sliding groove provided between the opposite side walls inside the fixed frame, the second sliders installed in the sliding groove, a fixed plate installed on one side of the fixed box, an opening provided on the fixed plate, and one end of the movable block passing through the opening and fixed to one side of the movable plate.

[0009] Preferably, dampers are connected to both sides of the lower end of the movable plate, and the lower end of the dampers is connected to the bottom of the fixed frame.

[0010] Preferably, a first slider is fixed to one side of the support frame, and one end of the first slider is slidably connected to one side inside the purification box.

[0011] Preferably, the surface of the spiral guide plate is plasma-sprayed with a Cr3C2-NiCr coating.

[0012] In this invention, the cooled and dust-removed flue gas enters the conical air intake hood through the air intake pipe. The spiral flow of the spiral guide plate forms a rapidly rotating gas. The vibration mechanism drives the moving block to move up and down, which in turn drives the three filter screens to vibrate up and down, thereby increasing the contact area and range during gas delivery and improving the purification effect.

[0013] The operating procedure of this utility model is as follows:

[0014] 1. Flue Gas Entry: After cooling and dust removal, the metallurgical flue gas first enters the conical inlet hood through the inlet pipe. Inside the conical inlet hood, the spiral guide plates evenly spaced on the side walls act as spiral guides for the flue gas, causing it to rotate rapidly. This rotating gas shape helps to better contact the filter material subsequently.

[0015] 2. Filtration process: The flue gas, after being guided, enters the purification chamber from one end of the conical air inlet hood, and passes sequentially through the stainless steel wedge wire mesh, nickel-based sintered felt mesh and PTFE-coated fiberglass mesh installed on the support frame. The three different filter materials can perform multi-stage filtration of dust with different particle sizes and properties in the flue gas, and gradually remove harmful substances in the flue gas.

[0016] 3. Vibration Assist: During the filtration process, the vibration mechanism starts working. The vibration motor at the upper end of the fixed frame starts, driving the two pull rods connected to its lower end to move. The lower end of the pull rod is rotatably connected to the moving plate. Since the second sliders on both sides of the moving plate are installed in the grooves on the opposite side walls of the fixed frame, the moving plate will move up and down under the drive of the pull rod. One end of the moving block passes through the opening on the fixed plate and is fixed to one side of the moving plate. Therefore, the up and down movement of the moving plate will drive the moving block to move up and down. The support frame is fixed to one side of the moving block, which ultimately realizes the up and down vibration of the stainless steel wedge wire mesh, nickel-based sintered felt mesh and PTFE-coated fiberglass mesh on the support frame.

[0017] 4. Purified exhaust: The flue gas, after being purified through multiple stages of filtration, is discharged from the conical exhaust hood on the other side of the purification chamber, completing the entire filtration and purification process.

[0018] This utility model has the following advantages:

[0019] 1. By using a vibration mechanism to drive the three filter screens to vibrate up and down, the contact area and range between the gas and the filter screens during gas transportation can be increased. This allows the dust in the flue gas to come into more full contact with the filter screens, improving filtration efficiency and thus enhancing the purification effect of the entire device, ensuring that the emitted flue gas meets environmental protection standards.

[0020] 2. Sticky dust in metallurgical flue gas is prone to caking on the filter screen and causing blockage. The up-and-down vibration of the filter screen can effectively prevent dust from accumulating and caking on the filter screen, reducing the occurrence of filter screen blockage. This not only extends the service life of the filter screen, but also reduces the cost and maintenance workload of frequent filter screen replacement due to filter screen blockage.

[0021] 3. The surface of the spiral guide plate is plasma-sprayed with a Cr3C2-NiCr coating, which has good wear resistance and corrosion resistance, ensuring the stable performance of the spiral guide plate during long-term use and improving the reliability and stability of the entire device.

[0022] 4. The conical air intake hood and spiral guide plate make the flue gas form a rapidly rotating gas. The flow pattern helps to evenly distribute the flue gas flow in the purification chamber, avoiding excessive concentration of flue gas in local areas, which would affect the filtration effect and further improve the efficiency and quality of the entire filtration and purification process.

[0023] In summary, this invention can increase the contact area and range between the gas and the filter screen during gas delivery, thereby improving filtration efficiency. It also reduces the cost and maintenance workload of frequent filter screen replacements due to clogging, and improves the reliability and stability of the entire device. In addition, the gas delivery pattern enhances the efficiency and quality of the entire filtration and purification process. Attached Figure Description

[0024] Figure 1 This is a diagram of the internal structure of the present invention;

[0025] Figure 2 A structural diagram showing the arrangement of the three filter plates of this utility model;

[0026] Figure 3 This is a diagram showing the external structure of the present invention.

[0027] Figure 4 This is a structural diagram of the vibration mechanism of this utility model;

[0028] Figure 5 A structural diagram showing the moving block configuration of this utility model.

[0029] In the diagram: 1. Fixed plate, 2. Opening, 3. Fixed box, 4. Bearing frame, 5. PTFE coated fiberglass mesh, 6. Moving block, 7. Stainless steel wedge wire mesh, 8. Nickel-based sintered felt mesh, 9. First slider, 10. Spiral guide plate, 11. Conical air inlet hood, 12. Air inlet pipe, 13. Vibration motor, 14. Tie rod, 15. Slide groove, 16. Second slider, 17. Moving plate, 18. Fixed frame, 19. Damper, 20. Purification box, 21. Conical exhaust hood. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0031] Reference Figure 1-5 A metallurgical flue gas dust filtration and purification device includes a purification box 20. A conical air inlet structure is connected to one side of the purification box 20, and a conical air outlet structure is connected to the other side. A fixed box 3 is fixed inside the purification box 20 on one side. A fixed frame 18 is fixed inside the fixed box 3, and a vibration mechanism is installed on the fixed frame 18. A moving block 6 is installed on the vibration mechanism. A support frame 4 is fixed to one side of the moving block 6. Stainless steel wedge wire mesh 7, nickel-based sintered felt mesh 8, and PTFE-coated fiberglass mesh 5 are installed at equal intervals on the support frame 4. The stainless steel wedge wire mesh is made of high-strength stainless steel and is connected to the support bars via wedge wires. Welding creates uniform gaps that can intercept large dust particles and withstand significant pressure differences, preventing deformation or damage. Its high porosity allows for uniform airflow dispersion, reducing localized blockages and improving overall filtration efficiency. Nickel-based sintered felt is made by non-woven metal fiber layup and high-temperature sintering, forming a three-dimensional network porous structure with a porosity of 50%-60%. It can adsorb medium-sized dust particles and some harmful gases, has a large dirt-holding capacity, and its surface filtration mechanism combined with vibration assistance allows for repeated cleaning and regeneration, reducing maintenance costs. PTFE membrane is composited with glass fiber substrate through a hot-pressing process to form a microporous membrane that can trap submicron-sized particles, resulting in high filtration efficiency.

[0032] The conical air intake structure includes a conical air intake hood 11 installed on one side of the purification box 20. Spiral guide plates 10 are evenly spaced on the circumferential side wall inside the conical air intake hood 11. One end of the conical air intake hood 11 is connected to an air intake pipe 12. One end of the conical air intake hood 11 corresponds to the stainless steel wedge wire mesh 7. The spiral angle and spacing of the spiral guide plates 10 are designed according to the flow rate, flow rate and common dust particle size of the metallurgical flue gas, which can maximize the formation of regular rotating fast gas of flue gas, creating good conditions for the subsequent filtration process.

[0033] The conical exhaust structure includes a conical exhaust hood 21 installed on the other side of the purification chamber 20. The conical exhaust hood 21 corresponds to the PTFE-coated fiberglass mesh 5, which can gather and buffer the purified flue gas, so that the flue gas can be discharged from the device smoothly and orderly, avoiding the impact on the purification effect due to sudden pressure changes or airflow turbulence, and also reducing the impact on subsequent connected equipment.

[0034] The vibration mechanism includes a vibration motor 13 mounted on the upper end of the fixed frame 18. The vibration motor 13 is a YZO series motor with a fully enclosed structure and a protection level of IP55 or higher, which can effectively prevent dust and high temperature.

[0035] Two pull rods 14 are connected to the lower end of the vibration motor 13. A movable plate 17 is rotatably connected to the lower end of the pull rods 14. Multiple second sliders 16 are fixed on both sides of the movable plate 17. Slide grooves 15 are provided between the opposite side walls inside the fixed frame 18. The second sliders 16 are installed in the slide grooves 15. A fixed plate 1 is installed on one side of the fixed box 3. An opening 2 is provided on the fixed plate 1. One end of the movable block 6 passes through the opening 2 and is fixed to one side of the movable plate 17. Dampers 19 are connected to both sides of the lower end of the movable plate 17. The lower end of the damper 19 is connected to the bottom inside the fixed frame 18. This can effectively reduce unnecessary shaking and impact during vibration and avoid damage to the internal structure of the device due to excessive vibration.

[0036] A first slider 9 is fixed on one side of the support frame 4, and one end of the first slider 9 is slidably connected to one side inside the purification box 20. The setting of the first slider 9 makes the support frame 4 more stable during up and down vibration, ensuring that the support frame 4 moves along the predetermined track, preventing the support frame 4 from shifting or tilting during vibration, ensuring that the contact area and angle between the filter screen and the flue gas remain stable, which is conducive to improving the filtration efficiency.

[0037] The surface of the spiral guide plate 10 is plasma-sprayed with a Cr3C2-NiCr coating. The Cr3C2-NiCr coating has excellent high temperature resistance, wear resistance and corrosion resistance. In the environment of metallurgical flue gas, which is high temperature, dusty and may contain corrosive substances, this coating can effectively protect the spiral guide plate 10, extend its service life, reduce the decline in guiding effect caused by the damage of the guide plate, and ensure the long-term stable operation of the entire device.

[0038] In this invention, the cooled and dust-removed flue gas enters the conical air intake hood 11 through the air intake pipe 12. The spiral guide plate 10 forms a rapidly rotating gas. The vibration mechanism drives the moving block 6 to move up and down, which in turn drives the three filter screens to vibrate up and down, thereby increasing the contact area and range during gas delivery and improving the purification effect.

[0039] The operating procedure of this utility model is as follows:

[0040] 1. Flue gas entry: After cooling and dust removal, the metallurgical flue gas first enters the conical inlet hood 11 through the inlet pipe 12. Inside the conical inlet hood 11, the spiral guide plates 10 arranged at equal intervals on the side walls will guide the flue gas in a spiral manner, making the flue gas form a rapidly rotating gas. The rotating gas shape helps to better contact the filter material in the subsequent process.

[0041] 2. Filtration process: The flue gas, after being guided, enters the purification box 20 from one end of the conical air inlet hood 11, and passes in sequence through the stainless steel wedge wire mesh 7, nickel-based sintered felt mesh 8 and PTFE-coated fiberglass mesh 5 installed on the support frame 4. The three different filter materials can perform multi-stage filtration of dust with different particle sizes and properties in the flue gas, and gradually remove harmful substances in the flue gas.

[0042] 3. Vibration Assistance: During the filtration process, the vibration mechanism starts working. The vibration motor 13 at the upper end of the fixed frame 18 starts, driving the two pull rods 14 connected to its lower end to move. The lower end of the pull rod 14 is rotatably connected to the moving plate 17. Since the second sliders 16 on both sides of the moving plate 17 are installed in the sliding grooves 15 on the opposite side walls of the fixed frame 18, the moving plate 17 will move up and down under the drive of the pull rods 14. One end of the moving block 6 passes through the opening 2 on the fixed plate 1 and is fixed to one side of the moving plate 17. Therefore, the up and down movement of the moving plate 17 will drive the moving block 6 to move up and down. The support frame 4 is fixed to one side of the moving block 6, which finally realizes the up and down vibration of the stainless steel wedge wire mesh 7, nickel-based sintered felt mesh 8 and PTFE-coated fiberglass mesh 5 on the support frame 4.

[0043] 4. Discharge after purification: The flue gas purified by multi-stage filtration is discharged from the conical exhaust hood 21 on the other side of the purification chamber 20, completing the entire filtration and purification process.

[0044] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. A metallurgical flue gas dust filtration and purification device, comprising a purification box (20), characterized in that, A conical air intake structure is connected to one side of the purification box (20), and a conical air outlet structure is connected to the other side of the purification box (20). A fixed box (3) is fixed to one side of the purification box (20), and a fixed frame (18) is fixed inside the fixed box (3). A vibration mechanism is installed on the fixed frame (18), and a moving block (6) is installed on the vibration mechanism. A bearing frame (4) is fixed to one side of the moving block (6). Stainless steel wedge wire mesh (7), nickel-based sintered felt mesh (8) and PTFE-coated fiberglass mesh (5) are installed at equal intervals on the bearing frame (4).

2. The metallurgical flue gas dust filtration and purification device according to claim 1, characterized in that: The conical air intake structure includes a conical air intake hood (11) installed on one side of the purification box (20). Spiral guide plates (10) are provided at equal intervals on the circumferential side wall inside the conical air intake hood (11). One end of the conical air intake hood (11) is connected to an air intake pipe (12). One end of the conical air intake hood (11) corresponds to a stainless steel wedge wire mesh (7).

3. The metallurgical flue gas dust filtration and purification device according to claim 1, characterized in that: The conical air outlet structure includes a conical air outlet hood (21) installed on the other side of the purification box (20), and the conical air outlet hood (21) corresponds to the PTFE-coated fiberglass mesh (5).

4. The metallurgical flue gas dust filtration and purification device according to claim 1, characterized in that: The vibration mechanism includes a vibration motor (13) mounted on the upper end of a fixed frame (18). The lower end of the vibration motor (13) is connected to two pull rods (14). The lower end of the pull rods (14) is rotatably connected to a movable plate (17). Multiple second sliders (16) are fixed on both sides of the movable plate (17). Slide grooves (15) are provided between the opposite side walls inside the fixed frame (18). The second sliders (16) are installed in the slide grooves (15). A fixed plate (1) is installed on one side of the fixed box (3). An opening (2) is provided on the fixed plate (1). One end of the movable block (6) passes through the opening (2) and is fixed to one side of the movable plate (17).

5. The metallurgical flue gas dust filtration and purification device according to claim 4, characterized in that: The lower ends of the movable plate (17) are connected to dampers (19) on both sides, and the lower ends of the dampers (19) are connected to the bottom of the fixed frame (18).

6. The metallurgical flue gas dust filtration and purification device according to claim 1, characterized in that: A first slider (9) is fixed on one side of the support frame (4), and one end of the first slider (9) is slidably connected to one side inside the purification box (20).

7. The metallurgical flue gas dust filtration and purification device according to claim 2, characterized in that: The surface of the spiral guide plate (10) is plasma-sprayed with a Cr3C2-NiCr coating.

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