A cathode wire

Abstract

The utility model belongs to the technical field of electric dust collector, specifically provides a cathode line, including round steel one, pole line body, a plurality of discharge needle, tensioner and round steel two, one end of pole line body is connected frame steel pipe no.

Description

Technical Field

[0001] This utility model belongs to the field of electrostatic precipitator technology, specifically relating to a cathode wire. Background Technology

[0002] Oxygen converter steelmaking flue gas is one of the main air pollutants generated during the steelmaking process. To recover and utilize the coal gas and iron-containing dust in the converter flue gas, a dry purification and recovery system for converters is an advanced process for treating steelmaking gases and recovering converter coal gas and iron-containing dust. Dry dust removal systems for converters generally use cylindrical electrostatic precipitators as the main dust collection device, primarily due to their low resistance and low energy consumption. Cylindrical electrostatic precipitators have a cylindrical shape, and the internally assembled cathode arrays are designed to fit this cylindrical shape, resulting in a variety of sizes compared to ordinary square electrostatic precipitators. This leads to a greater variety of cathode wire sizes. Cylindrical electrostatic precipitators are generally assembled and installed on-site, resulting in a larger workload, more complex procedures, and lower assembly efficiency for the cathode wires. The V-shaped electrodes used in cylindrical electrostatic precipitators are mainly assembled into cathode rows by round steel bars and cathode frames. Because there is no device to prevent the V-shaped electrodes from rotating between the round steel bars and the cathode frame tubes, it is difficult to maintain their perpendicularity during assembly, greatly reducing assembly efficiency and leading to rework. Furthermore, with multiple V-shaped cathode electrodes on a cathode frame, it is difficult to ensure consistent tension during assembly; even using a torque wrench can cause electrode bending. There is an urgent need to improve electrode assembly efficiency.

[0003] Different steel mills have different characteristics of flue gas and dust. The electrode discharge needle tip discharge form and the spacing of the discharge needles used in the electrostatic precipitator should be adapted to the characteristics of the flue gas and dust for optimal performance. It is not possible to use the same method for all of them, as this would reduce the operating efficiency of the electrostatic precipitator.

[0004] Chinese patent document CN109277199A discloses a high-efficiency and energy-saving electrostatic precipitator, including cathode wires, cathode frames, and anode plates. Several cathode frames and anode plates are arranged alternately in parallel. Each cathode frame contains several cathode wires. Each cathode frame includes a crossbeam, and the crossbeams in two adjacent rows of cathode frames are not on the same horizontal plane. Each cathode wire includes a support tube and barbs, with the top of the barb having a front tip and a rear tip. The distance between the front and rear tips is greater than the maximum distance between the front and rear of the support tube. The anode plate includes several anode plate bodies, with a collection groove on the right side and a limiting edge on the left. The advantages of this invention are: when dust-laden flue gas near the cathode frame in the previous electric field cannot be charged, it can be effectively charged upon entering the next electric field. This effectively avoids the shielding effect of the support tube on the corona discharge of the barb tips, ensuring that the area corresponding to the support tube in the middle of the barb wire has corona current, and reducing the weight of the anode plate. The problems of ensuring perpendicularity when assembling round steel and cathode frame round tubes, maintaining consistent tension during assembly, low assembly efficiency, and rework are not yet resolved; as are the low operating efficiency of the electrostatic precipitator. Utility Model Content

[0005] The present invention provides a cathode wire that aims to overcome the problems in the prior art, such as difficulty in ensuring the perpendicularity of the round steel and the round tube of the cathode frame during assembly, difficulty in ensuring the consistency of tension during the assembly process, low assembly efficiency, easy rework, and low operating efficiency of the electrostatic precipitator.

[0006] Therefore, this utility model provides a cathode wire, which is connected between a first frame steel pipe and a second frame steel pipe. The cathode wire includes a first round steel bar, an electrode wire body, multiple discharge needles, a tensioning device, and a second round steel bar. One end of the electrode wire body is connected to the first frame steel pipe through the first round steel bar, and one end of the first round steel bar away from the electrode wire body is connected to the tensioning device. The other end of the electrode wire body is connected to the second frame steel pipe through the second round steel bar. The end face of the electrode wire body is connected to the outer surface of the second frame steel pipe, and multiple discharge needles are connected to the electrode wire body.

[0007] Preferably, the polar line is a strip steel, with the vertical center line of the strip steel as the center, and the upper and lower parts of the strip steel are bent to the same side. The upper bending area of ​​the strip steel is connected to round steel one, and the lower bending area of ​​the strip steel is connected to round steel two.

[0008] Preferably, the upper bending area of ​​the strip is divided into a 90° bending area one and a transition area one from top to bottom, and the lower bending area of ​​the strip is divided into a transition area two, a 90° bending area two and a transition area three from top to bottom.

[0009] Preferably, the included angle between the left and right sides of the strip after bending in both the first and second 90° bending zones is 90°.

[0010] Preferably, the shape of the included angle position of the first 90° bend and the second 90° bend is arc-shaped, and the left and right sides of the first transition area, the second transition area and the third transition area are both arc-shaped.

[0011] Preferably, the lower end face of the polar wire is arc-shaped.

[0012] Preferably, in the first and second 90° bending areas, the middle of the left side and the middle of the right side both bulge inward.

[0013] Preferably, the protrusion in the first 90° bend area is welded to the first round steel bar, and the protrusion in the second 90° bend area is welded to the second round steel bar.

[0014] Preferably, the discharge needle is a round steel wire with both ends beveled.

[0015] Preferably, the round steel is a round steel with threads at one end, and a nut is connected to the threads.

[0016] The beneficial effects of this utility model are:

[0017] 1. The cathode wire provided by this utility model has one end connected to a frame steel pipe via a round steel bar, and the other end connected to a frame steel pipe via a round steel bar. The end face of the cathode wire is connected to the outside of the frame steel pipe, enabling rapid positioning of the cathode wire, preventing rotation of the cathode wire within the cathode frame, and improving assembly efficiency. A tensioning device is connected to the end of the round steel bar away from the cathode wire to prevent bending of the cathode wire. The spacing between multiple discharge needles and the tip of the discharge needles can be selected according to the characteristics of the flue gas, improving the adaptability of the cathode wire to the characteristics of flue gas and dust, and improving the efficient operation and stability of the electrostatic precipitator.

[0018] 2. In the cathode wire provided by this utility model, the protrusion in the first 90° bend area is welded to the first round steel, and the protrusion in the second 90° bend area is welded to the second round steel, ensuring welding strength and preventing warping and deformation. Attached Figure Description

[0019] The present invention will be further described in detail below with reference to the accompanying drawings.

[0020] Figure 1 This is a structural diagram of the cathode wire;

[0021] Figure 2 yes Figure 1 Diagram of resistance projection welding structure at the CC position;

[0022] Figure 3 This is a schematic diagram of the structure of an polar line body;

[0023] Figure 4 yes Figure 3 Schematic diagram of the structure at point DD;

[0024] Figure 5 yes Figure 4 Schematic diagram of the structure at the EE section;

[0025] Figure 6 This is a schematic diagram of the discharge needle.

[0026] Figure 7 This is a structural schematic diagram of round steel bar II;

[0027] Figure 8 This is a structural schematic diagram of round steel bar 1.

[0028] Explanation of reference numerals in the attached drawings: 1. Round steel bar one; 2. Electrode body; 3. Discharge needle; 4. Frame steel pipe two; 5. Tensioning device; 6. Nut; 7. Frame steel pipe one; 8. Round steel bar two; 9. Protrusion. Detailed Implementation

[0029] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0030] Example 1:

[0031] like Figure 1 As shown, a cathode wire is connected between a frame steel pipe 7 and a frame steel pipe 4. It includes a round steel bar 1, an electrode wire body 2, multiple discharge needles 3, a tensioning device 5, and a round steel bar 8. One end of the electrode wire body 2 is connected to the frame steel pipe 7 through the round steel bar 1, and the end of the round steel bar 1 away from the electrode wire body 2 is connected to the tensioning device 5. The other end of the electrode wire body 2 is connected to the frame steel pipe 4 through the round steel bar 8. The end face of the electrode wire body 2 is connected to the outer surface of the frame steel pipe 4, and multiple discharge needles 3 are connected to the electrode wire body 2.

[0032] Specifically, during assembly, multiple discharge needles 3 are connected to the electrode body 2. One end of the electrode body 2 is connected to one end of round steel 1, and the other end of the electrode body 2 is connected to one end of round steel 8. The other end of round steel 8 is inserted into the frame steel pipe 4 until the end face of the other end of the electrode body 2 contacts the outer surface of the frame steel pipe 4. Then, the other end of round steel 1 is inserted into the frame steel pipe 7. A tensioning device 5 is connected to the other end of round steel 1. The tensioning device 5 is used to fasten round steel 1 and frame steel pipe 7, completing the installation. The end face of the electrode body 2 enables rapid positioning of the cathode wire, preventing the cathode wire from rotating within the cathode frame and improving assembly efficiency. By connecting the tensioning device 5 to the end of round steel 1, which is away from the electrode body 2, bending of the cathode wire is prevented. The spacing between the multiple discharge needles 3 can be selected according to the characteristics of the flue gas, improving the adaptability of the cathode wire to the characteristics of flue gas and dust, and improving the high-efficiency operation and stability of the electrostatic precipitator.

[0033] Example 2:

[0034] Based on Example 1, such as Figures 2-5 As shown, the polar line body 2 is a strip steel. With the vertical center line of the strip steel as the center, the upper and lower parts of the strip steel are bent to the same side. The upper bending area of ​​the strip steel is connected to round steel 1, and the lower bending area of ​​the strip steel is connected to round steel 2 8.

[0035] Specifically, the bending structure of the strip facilitates a secure connection between round steel bar 1 and round steel bar 2, improving the convenience and reliability of installation. The bending structure can also serve as a positioning structure, helping to accurately connect round steel bar 1 and round steel bar 2 at designated positions within the polar line body 2, reducing installation errors.

[0036] Preferably, the upper bending area of ​​the strip is divided into a 90° bending area one and a transition area one from top to bottom, and the lower bending area of ​​the strip is divided into a transition area two, a 90° bending area two and a transition area three from top to bottom.

[0037] Specifically, 90° bend zone one serves as the connecting plane for round steel bar 1, and 90° bend zone two serves as the connecting plane for round steel bar 8, providing a stable connection foundation. Transition zones one, two, and three make the connection smoother, reducing stress concentration and improving connection reliability. In cold rolling or hot bending processes, the transition zones (transition zones one, two, and three) can be preliminarily bent or shaped before precisely forming the 90° bend zones (90° bend zone one and 90° bend zone two). This makes it easier to control the bending angle, dimensional accuracy, and surface quality, reducing processing errors and scrap rates.

[0038] Preferably, the included angle between the left and right sides of the strip after bending in both the first and second 90° bending zones is 90°.

[0039] Specifically, the 90° angle structure forms a rigid node, which can directly transfer the tensile stress, compressive stress or shear force borne by the strip steel to round steel 1 and round steel 2 8 through the right-angle side, reducing the concentration of stress at the bending point; the 90° angle is one of the most stable angles in plane geometry, and it can maintain shape accuracy without additional support. Compared with other angles (such as acute angles or obtuse angles), the right-angled round steel 1 and round steel 2 8 are not prone to angular displacement due to external forces, ensuring the long-term stability of the structure.

[0040] Preferably, the shape of the included angle position of the first 90° bend and the second 90° bend is arc-shaped, and the left and right sides of the first transition area, the second transition area and the third transition area are both arc-shaped.

[0041] Specifically, the arcs in transition zones one, two, and three smoothly transition the different shapes and angles of the strip, preventing stress concentration at the edges. Compared to right-angle or acute-angle transitions, arcs allow for more uniform stress distribution, reducing material fatigue and cracking caused by stress concentration, thereby improving the overall service life and reliability of the strip; and they are also easier to process.

[0042] Preferably, the lower end face of the polar wire body 2 is arc-shaped.

[0043] Specifically, the lower end face of the strip is arc-shaped. The lower end face of the strip is first processed into an arc according to the size of the frame steel pipe 24. The radius of the arc can be varied according to the size of the frame steel pipe 24. After the arc is assembled with the frame steel pipe 24, it can effectively prevent the rotation of the electrode body 2, and the assembly efficiency of the electrode is high.

[0044] Preferably, in the first and second 90° bending areas, the middle left and middle right sides both protrude inward by 9 degrees.

[0045] Specifically, protrusion 9 facilitates the welding of strip steel to round steel 1 and round steel 2 8.

[0046] Preferably, the protrusion 9 in the first 90° bending zone is welded to the first round steel 1, and the protrusion 9 in the second 90° bending zone is welded to the second round steel 8.

[0047] Specifically, resistance projection welding is used at position 9 of the protrusion to ensure welding strength and prevent warping and deformation.

[0048] Preferably, the strip bending is performed by cold bending.

[0049] Specifically, cold bending significantly improves the strength and hardness of the bent parts without the need for heating, thus avoiding performance degradation caused by hot working.

[0050] Preferably, the strip thickness is 2mm, the strip width is 15-20mm, the strip length is 500-1500mm, the radius of the arc at the included angle position in the first and second 90° bends is 2mm, the lengths of the first, second, and third 90° bends are all 20mm, the distance between the protrusion 9 and the included angle is 4mm, the weld size at the protrusion 9 is 6mm long, 3mm wide, and 0.6mm thick, and the strip material is stainless steel or carbon steel.

[0051] Specifically, this size of polar wire body 2 better meets the usage requirements. In actual operation, the size of polar wire body 2 can also be adjusted as needed to meet usage requirements.

[0052] Example 3:

[0053] Based on Example 2, such as Figure 6 As shown, the discharge needle 3 is a circular steel wire with both ends cut at an angle.

[0054] Specifically, in electrostatic precipitators, obliquely cut discharge needles can ionize gas molecules more efficiently, improving dust removal efficiency; oblique cutting can be achieved through simple mechanical cutting, without the need for complex forming processes, making it suitable for mass production.

[0055] Preferably, the two tips of the circular steel wire are diagonally arranged, and the two beveled surfaces are parallel to each other.

[0056] Specifically, the two parallel oblique planes optimize the electric field distribution, improve dust charging efficiency, enhance discharge stability, and reduce operational failures.

[0057] Preferably, the angle of the two ends of the circular steel wire after beveling is 30°-60°.

[0058] Specifically, by adjusting the bevel angle, the peak electric field strength and discharge area width at the tip can be precisely controlled; the smaller the angle (e.g., 30°), the sharper the tip and the lower the corona initiation voltage, which is suitable for low-concentration dust scenarios; the larger the angle (e.g., 60°), the wider the discharge range, which is suitable for high-concentration dust or high-wind-speed conditions (e.g., flue gas dust removal in coal-fired power plant boilers).

[0059] Preferably, the diameter of the round steel wire is 2.5mm-2.8mm, the length is 30mm, and the material is stainless steel or carbon steel.

[0060] Specifically, the circular steel wire of this size has a moderate discharge intensity, which can make the electric field intensity distribution between the electrodes more uniform, which is conducive to the uniform charging of dust in the electric field and improves dust removal efficiency; it is easy to process and the material cost is moderate.

[0061] Preferably, the distance between two adjacent discharge needles 3 is 50-100mm.

[0062] Specifically, taking the electrode body 2 as the main body, the discharge needles 3 are connected to the electrode body 2 by contact spot welding. During contact spot welding, it is ensured that the discharge needles 3 are positioned on the electrode body, with their tips facing the same direction and not rotating. The spacing between the discharge needles 3 is 75mm, but can also be selected between 50-100mm depending on the characteristics of the flue gas. Then, round steel 28 is resistively projected onto the arc-shaped end of the electrode body 2, and round steel 1 is resistively projected onto the other end of the electrode body 2. The resistance projection welding must be performed at the protruding positions 9 at both ends of the electrode body 2 to ensure welding strength.

[0063] Example 4:

[0064] Based on Example 3, such as Figure 7 and Figure 8 As shown, the round steel bar 1 is a round steel bar with a thread on one end, and a nut 6 is connected to the thread.

[0065] Specifically, the threaded round steel bar 1 has threads that facilitate the connection of the tensioning device 5 and the nut 6.

[0066] Preferably, the tensioning device 5 consists of two interlocking elastic washers.

[0067] Specifically, the two interlocking elastic washers and nuts 6 are tightly connected to the frame steel pipe 7, ensuring that the polar wire body 2 is in a taut state under the action of the elastic force of the elastic washers.

[0068] Preferably, the diameter of the round steel bar 1 and the round steel bar 8 is 8mm, and the material is carbon steel.

[0069] Specifically, the round steel bars 1 and 2 are economical, practical, and efficient to construct.

[0070] Example 5:

[0071] Based on Example 4, a method for using a cathode wire includes the following steps: multiple discharge needles 3 are connected to the electrode wire body 2; one end of the electrode wire body 2 is connected to one end of round steel 1; the other end of the electrode wire body 2 is connected to one end of round steel 8; the other end of round steel 8 is inserted into the frame steel pipe 4 until the end face of the other end of the electrode wire body 2 contacts the outer surface of the frame steel pipe 4; the other end of round steel 1 is inserted into the frame steel pipe 7; a tensioning device 5 is connected to the other end of round steel 1; the tensioning device 5 is used to fasten round steel 1 and frame steel pipe 7, thus completing the installation.

[0072] Specifically, the electrode wire assembled from round steel 1, electrode wire body 2, discharge needle 3, and round steel 2 8 is then assembled with frame steel pipe 1 7 and frame steel pipe 2 4. During assembly, round steel 2 8 is first inserted into frame steel pipe 2 4. Since the end face of one end of electrode wire body 2 has an arc, it plays a role in positioning the electrode wire and preventing rotation. After insertion, the outer ends of round steel 2 8 and frame steel pipe 2 4 are welded together, which is convenient and quick. Then, after slightly bending electrode wire body 2, the other end of round steel 1 is inserted into frame steel pipe 1 7. The tensioning device 5 and nut 6 are connected to the other end of round steel 1. After tightening, the outer ends of round steel 1 and frame steel pipe 1 7 can be welded together or not. The tensioning device 5 consists of two interlocking elastic washers to ensure that the electrode wire is in a taut state.

[0073] This invention features rapid positioning and prevents the cathode wire from rotating within the cathode frame. Equipped with a tensioning device, it ensures the cathode wires do not bend during transportation, hoisting, and operation, guaranteeing the electrode spacing during electrostatic precipitator operation. The discharge needle spacing and tip selection can be tailored to flue gas characteristics, improving the adaptability of the cathode wires to the flue gas and dust properties, thus enhancing the high efficiency and stability of the electrostatic precipitator. The cathode wire of this invention is characterized by convenient preparation, strong welding, quick assembly and positioning, a reasonable structure, and stable operation.

[0074] In the description of this utility model, it should be understood that if terms such as "upper," "lower," or "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, it does not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the accompanying drawings are for illustrative purposes only and should not be construed as limiting this utility model.

[0075] The above examples are merely illustrative of this utility model and do not constitute a limitation on the scope of protection of this utility model. All designs that are the same as or similar to this utility model are within the scope of protection of this utility model.

Claims

1. A cathode wire, wherein a cathode wire is connected between a first frame steel pipe (7) and a second frame steel pipe (4), characterized in that: It includes a round steel bar (1), an electrode wire body (2), multiple discharge needles (3), a tensioning device (5), and a round steel bar (8). One end of the electrode wire body (2) is connected to the frame steel pipe (7) through the round steel bar (1), and the end of the round steel bar (1) away from the electrode wire body (2) is connected to the tensioning device (5). The other end of the electrode wire body (2) is connected to the frame steel pipe (4) through the round steel bar (8), and the end face of the electrode wire body (2) is connected to the outer side of the frame steel pipe (4). Multiple discharge needles (3) are connected to the electrode wire body (2).

2. The cathode wire as described in claim 1, characterized in that: The polar line body (2) is a strip steel. With the vertical center line of the strip steel as the center, the upper and lower parts of the strip steel are bent to the same side. The upper bending area of ​​the strip steel is connected to round steel one (1), and the lower bending area of ​​the strip steel is connected to round steel two (8).

3. The cathode wire as described in claim 2, characterized in that: The upper bending area of ​​the strip is divided into a 90° bending area one and a transition area one from top to bottom, and the lower bending area of ​​the strip is divided into a transition area two, a 90° bending area two and a transition area three from top to bottom.

4. The cathode wire as described in claim 3, characterized in that: After bending in both 90° bending zone one and 90° bending zone two, the included angle between the left and right sides of the strip is 90°.

5. The cathode wire as described in claim 4, characterized in that: The shape at the included angle of the first and second 90° bends is arc-shaped, and the left and right sides of the first, second and third transition zones are also arc-shaped.

6. The cathode wire as described in claim 2, characterized in that: The lower end face of the polar line body (2) is arc-shaped.

7. The cathode wire as described in claim 4, characterized in that: In the first and second 90° bend areas, the middle of the left side and the middle of the right side both bulge inward (9).

8. The cathode wire as described in claim 7, characterized in that: The protrusion (9) in the first 90° bend zone is welded to the first round steel (1), and the protrusion (9) in the second 90° bend zone is welded to the second round steel (8).

9. The cathode wire as described in claim 1, characterized in that: The discharge needle (3) is a round steel wire with both ends cut at an angle.

10. The cathode wire as claimed in claim 1, characterized in that: The round steel (1) is a round steel with a thread on one end, and a nut (6) is connected to the thread.

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