Cathode wire and use method thereof

Abstract

The invention belongs to the technical field of electric dust removers, and particularly provides a cathode wire and a using method thereof.The cathode wire comprises first round steel, a pole wire body, a plurality of spray points, a tensioning device and second round steel, one end of the pole wire body is connected with a first frame steel pipe through the first round steel, and the end, away from the pole wire body, of the first round steel is connected with the tensioning device; the other end of the pole wire body is connected with the second frame steel pipe through the second round steel, the end face of the pole wire body is connected with the outside of the second frame steel pipe, and the pole wire body is connected with a plurality of spray points, so that the problems that the perpendicularity is difficult to grasp when the existing round steel and the cathode frame round pipe are assembled, the consistency of tensile force is difficult to guarantee in the assembling process, the assembling efficiency is low, and the working efficiency is low are solved. The reworking phenomenon is easy to occur; according to the electric dust collector, rapid positioning of the cathode wires is achieved, the cathode wires are prevented from rotating in the cathode frame, the assembling efficiency is improved, and efficient operation and stability of the electric dust collector are improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of electric precipitators, and particularly relates to a cathode wire and a use method thereof. BACKGROUND

[0002] Converter gas is one of the main atmospheric pollutants generated in the production process of the steel industry, and the coal gas and iron-containing dust in the converter gas need to be recycled and utilized. The converter dry purification and recycling system is an advanced process flow for treating steelmaking gas and recycling converter coal gas and iron-containing dust. The cylindrical electric precipitator is generally used as the main dust collection device in the converter dry dust removal system, mainly considering the small resistance and low energy consumption of the electric precipitator. The cylindrical electric precipitator adopts a cylindrical shape, and the cathode row assembled inside is adapted to the cylindrical shape. Compared with the ordinary square electric precipitator, the cylindrical electric precipitator has multiple specifications and sizes, resulting in more specifications and sizes of the cathode wire. The cylindrical electric precipitator is generally assembled and installed on site, and the cathode wire assembly workload is larger, the process is more complicated, and the assembly efficiency is low. In addition, the V-shaped pole wire used in the cylindrical electric precipitator is mainly assembled into a cathode row by a round steel and a cathode frame at both ends. Since there is no device for preventing the rotation of the V-shaped wire between the round steel and the cathode frame, it is difficult to grasp the perpendicularity during assembly, which greatly reduces the assembly efficiency and may also cause rework. In addition, there are multiple V-shaped cathode wires on one cathode frame, and it is difficult to ensure the consistency of the tension force during the assembly process. Even if a torque wrench is used for assembly, the pole wire may still be bent.

[0003] Different steel plants have different characteristics of steelmaking gas and dust, and the discharge needle tip discharge form and discharge needle arrangement spacing of the electric precipitator should be optimized according to the characteristics of the gas and dust. The discharge needle tip discharge form and discharge needle arrangement spacing of the electric precipitator cannot be the same, which reduces the running efficiency of the electric precipitator.

[0004] The Chinese patent document with publication number CN109277199A discloses an efficient energy-saving electric dust collector, which comprises cathode wires, cathode frames and anode plates. The cathode frames and anode plates are alternately arranged in parallel, and each cathode frame is provided with a plurality of cathode wires. Each cathode frame and anode plate comprises a cross beam, and the cross beams of two adjacent cathode frames are not in the same horizontal plane. The cathode wire comprises a support tube and a thorn, and the top end of the thorn is provided with a front tip and a rear tip. The distance between the front tip and the rear tip is greater than the maximum distance between the front and rear of the support tube. The anode plate comprises a plurality of anode plate bodies, and the right side of the anode plate body is provided with a collecting groove, and the left side is a limiting edge. The advantages of the present application are that the dust-containing flue gas near the cathode frame of the previous electric field can be effectively charged under the condition that it cannot be charged, the shielding effect of the support tube on the thorn tip corona discharge is effectively avoided, the area corresponding to the support tube in the middle of the thorn wire has corona current, and the weight of the anode plate is reduced. However, the verticality of the round steel and the cathode frame round pipe during assembly cannot be easily grasped, the consistency of the tension force during the assembly process is difficult to guarantee, the assembly efficiency is low, and the phenomenon of rework is prone to occur; and the running efficiency of the electric dust collector is low. SUMMARY

[0005] The present application provides a kind of cathode wire and its use method, to overcome the verticality of round steel and cathode frame round pipe during assembly in prior art, it is difficult to guarantee the consistency of tension force during the assembly process, assembly efficiency is low, and the phenomenon of rework is prone to occur;And the running efficiency of the electric dust collector is low.

[0006] Therefore, the present application provides a kind of cathode wire, frame steel pipe one and frame steel pipe two connect cathode wire, including round steel one, pole line body, a plurality of discharge needles, tension device and round steel two, one end of pole line body is connected frame steel pipe one through round steel one, the end of round steel one away from pole line body connects tension device;The other end of pole line body is connected frame steel pipe two through round steel two, the end surface of pole line body connects the outer side of frame steel pipe two, and a plurality of discharge needles are connected on pole line body.

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

[0008] Preferably, the upper bending area of the strip steel 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 steel 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 angles between the left and right sides of the strip steel after bending in the 90° bending area one and the 90° bending area two are both 90°.

[0010] Preferably, the shape at the angle position in the 90° bending area one and the 90° bending area two is circular arc, and the left and right shapes of the transition area one, the transition area two and the transition area three are all arc.

[0011] Preferably, the lower end surface of the polar line body is arc-shaped.

[0012] Preferably, in the 90° bending area one and the 90° bending area two, the left middle part and the right middle part are both inwardly convex.

[0013] Preferably, the convex in the 90° bending area one is welded with the round steel one, and the convex in the 90° bending area two is welded with the round steel two.

[0014] Preferably, the discharge needle is a circular steel wire, and the two ends of the circular steel wire are beveled.

[0015] A method for using the cathode wire, comprising the following steps: connecting a plurality of discharge needles on the polar line body, connecting one end of the polar line body with one end of the round steel one, connecting the other end of the polar line body with one end of the round steel two, inserting the other end of the round steel two into the frame steel pipe two until the end surface of the other end of the polar line body contacts the outer surface of the frame steel pipe two, inserting the other end of the round steel one into the frame steel pipe one, connecting a tensioning device at the other end of the round steel one, and fastening the round steel one and the frame steel pipe one through the tensioning device to complete the installation.

[0016] The beneficial effects of the present application are as follows: 1. The cathode wire provided by the present application realizes rapid positioning of the cathode wire, prevents rotation of the cathode wire in the cathode frame, and improves assembly efficiency, by connecting one end of the polar line body with the frame steel pipe one through the round steel one, connecting the other end of the polar line body with the frame steel pipe two through the round steel two, and connecting the end surface of the polar line body with the outer surface of the frame steel pipe two.

[0017] 2. The cathode wire provided by the present application guarantees welding strength and prevents warping deformation, by welding the convex in the 90° bending area one with the round steel one and welding the convex in the 90° bending area two with the round steel two. BRIEF DESCRIPTION OF DRAWINGS

[0018] The present application will be further described in detail below with reference to the accompanying drawings.

[0019] Figure 1 is a structural diagram of the cathode wire; Figure 2 is Figure 1 is a resistance projection welding structural diagram at C-C in the cathode wire; Figure 3 This is a schematic diagram of the structure of an polar line body; Figure 4 yes Figure 3 Schematic diagram of the structure at point DD; Figure 5 yes Figure 4 Schematic diagram of the structure at the EE point; Figure 6 This is a schematic diagram of the discharge needle; Figure 7 This is a structural schematic diagram of round steel bar II; Figure 8 This is a structural schematic diagram of round steel bar 1.

[0020] 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

[0021] The principles and features of the present invention are described below with reference to the accompanying drawings. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0022] Example 1: 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.

[0023] 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 bar 1, and the other end of the electrode body 2 is connected to one end of round steel bar 8. The other end of round steel bar 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 bar 1 is inserted into the frame steel pipe 7. A tensioning device 5 is connected to the other end of round steel bar 1. The tensioning device 5 is used to fasten round steel bar 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 bar 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.

[0024] Embodiment 2: On the basis of Embodiment 1, as shown in Figures 2-5 The pole 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 part of the strip steel is connected with the round steel one 1 in the bending area, and the lower part of the strip steel is connected with the round steel two 8 in the bending area.

[0025] Specifically, the bending structure of the strip steel facilitates the stable connection of the round steel one 1 and the round steel two 8, and improves the convenience and reliability of installation. The bending structure can serve as a positioning structure to help accurately connect the round steel one 1 and the round steel two 8 at the specified position in the pole line body 2, thereby reducing installation errors.

[0026] Preferably, the upper bending area of the strip steel 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 steel is divided into a transition area two, a 90° bending area two and a transition area three from top to bottom.

[0027] Specifically, the 90° bending area one serves as the connection plane of the round steel one 1, and the 90° bending area two serves as the connection plane of the round steel two 8, thereby providing a stable connection basis; the transition area one, the transition area two and the transition area three can make the connection part more smooth, reduce stress concentration, and improve the reliability of connection. In the processing technology of cold rolling or hot bending, the transition areas (the transition area one, the transition area two and the transition area three) can be preliminarily bent or shaped, and then the 90° bending areas (the 90° bending area one and the 90° bending area two) are accurately formed, so that it is easier to control the bending angle, dimensional accuracy and surface quality, thereby reducing processing errors and waste rates.

[0028] Preferably, the included angle between the left and right sides of the 90° bending area one and the 90° bending area two after bending is 90°.

[0029] Specifically, the 90° included angle structure forms a rigid node, which can directly transmit the tensile stress, compressive stress or shear force borne by the strip steel to the round steel one 1 and the round steel two 8 through the straight angle sides, thereby reducing the stress concentration phenomenon at the bending part; the 90° angle is one of the most stable angles in plane geometry, which can maintain shape accuracy without additional support, and compared with other angles (such as acute angle or obtuse angle), the round steel one 1 and the round steel two 8 connected at right angles are less likely to be angularly deviated due to external force, thereby ensuring long-term stability of the structure.

[0030] Preferably, the shape at the included angle position in the 90° bending area one and the 90° bending area two is a circular arc shape, and the shapes of the left and right sides of the transition area one, the transition area two and the transition area three are arc shapes.

[0031] Specifically, the arc shape of the transition area one, the transition area two and the transition area three can smoothly transition the shape and angle change of different parts of the strip steel, avoiding stress concentration at the edge. Compared with a straight angle or an acute angle transition, the arc shape can make the stress distribution more uniform, reduce problems such as material fatigue and crack generation caused by stress concentration, and thus improve the overall service life and reliability of the strip steel; and is easy to process.

[0032] Preferably, the lower end surface of the pole line body 2 is arc-shaped.

[0033] Specifically, the lower end surface of the strip steel is arc-shaped, and the lower end surface of the strip steel is first processed into a circular arc according to the size of the frame steel pipe two 4. The radius of the circular arc can be changed according to the size change of the frame steel pipe two 4. After the circular arc is assembled with the frame steel pipe two 4, the rotation of the pole line body 2 can be effectively prevented, and the assembly efficiency of the pole line is high.

[0034] Preferably, in the 90° bending area one and the 90° bending area two, the left middle part and the right middle part are both inwardly protruding 9.

[0035] Specifically, the protrusion 9 facilitates the welding of the strip steel with the round steel one 1 and the round steel two 8.

[0036] Preferably, the protrusion 9 in the 90° bending area one is welded with the round steel one 1, and the protrusion 9 in the 90° bending area two is welded with the round steel two 8.

[0037] Specifically, resistance projection welding is adopted at the position of the protrusion 9 to ensure the welding strength and prevent warping deformation.

[0038] Preferably, the strip steel is cold bent.

[0039] Specifically, cold bending significantly improves the strength and hardness of the bending part, and does not need to be heated, avoiding performance degradation caused by hot processing.

[0040] Preferably, the thickness of the strip steel is 2mm, the width of the strip steel is 15-20mm, the length of the strip steel is 500-1500mm, the radius of the circular arc at the position of the included angle in the 90° bending area one and the 90° bending area two is 2mm, the length of the 90° bending area one, the transition area one, the transition area two, the 90° bending area two and the transition area three is 20mm, the distance between the protrusions 9 and the included angle is 4mm, the size of the welding spot at the protrusion 9 is 6mm long, 3mm wide and 0.6mm thick, and the material of the strip steel is stainless steel or carbon steel.

[0041] Specifically, the size of the pole line body 2 can better meet the use requirements. In actual operation, the size of the pole line body 2 can also be adjusted as needed to meet the use requirements.

[0042] Example 3: Based on example 2, as Figure 6As shown, the discharge needle 3 is a round steel wire, and the two ends of the round steel wire are beveled.

[0043] Specifically, in the electrostatic precipitator, the beveled discharge needle can ionize gas molecules more efficiently and improve the dust removal efficiency; the beveling can be achieved by simple mechanical cutting without complex forming process, which is suitable for mass production.

[0044] Preferably, the two sharp ends of the round steel wire adopt a diagonal form, and the two bevels are parallel to each other.

[0045] Specifically, the parallel bevels optimize the electric field distribution, improve the dust charging efficiency, enhance the discharge stability, and reduce the operation failure.

[0046] Preferably, the angle of the two ends of the round steel wire after beveling is 30°-60°.

[0047] Specifically, by adjusting the beveling angle, the peak value of the electric field intensity of the sharp end and the discharge area width can be accurately controlled; the smaller the angle (such as 30°), the sharper the sharp end, the lower the corona voltage, and it is suitable for low-concentration dust scenarios; the larger the angle (such as 60°), the wider the discharge range, and it is suitable for high-concentration dust or high-wind-speed working conditions (such as coal-fired power plant boiler flue gas dust removal).

[0048] 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.

[0049] Specifically, the round steel wire of this size has moderate discharge strength, which can make the electric field intensity distribution between the electrodes more uniform, which is beneficial to the uniform charging of dust in the electric field and improves the dust removal efficiency; the processing difficulty is low, and the material cost is moderate.

[0050] Preferably, the spacing between the two adjacent discharge needles 3 is 50-100mm.

[0051] Specifically, taking the polar line body 2 as the main body, the discharge needle 3 is connected to the polar line body 2 through the contact point welding, and the discharge needle 3 is ensured to be located on the line body and the sharp end is ensured to face upward during the contact point welding, and the discharge needle 3 does not rotate. The spacing between the discharge needles 3 is 75mm, and it can also be selected within 50-100mm according to the characteristics of the flue gas; then the round steel two 8 is resistance projection welded at one end of the polar line body 2 with a circular arc, and the round steel one 1 is resistance projection welded at the other end of the polar line body 2, and the resistance projection welding must be performed at the protrusion 9 position at both ends of the polar line body 2 to ensure the welding strength.

[0052] Example 4: Based on example 3, as shown in Figure 7 and Figure 8 The round steel one 1 is a round steel with threads at one end, and the threads are provided with a nut 6.

[0053] Specifically, the threaded round steel 1 is convenient for connecting the tensioning device 5 and the nut 6.

[0054] Preferably, the tensioning device 5 is composed of two elastic washers.

[0055] Specifically, the threaded round steel 1 is convenient for connecting the tensioning device 5 and the nut 6.

[0056] Preferably, the diameters of the round steel 1 and the round steel 2 8 are 8 mm, and the materials are carbon steels.

[0057] Specifically, the round steel 1 and the round steel 2 8 of the structure are economical and practical, and the construction efficiency is high.

[0058] Embodiment 5: On the basis of embodiment 4, the use method of the cathode wire comprises the following steps: connecting a plurality of discharge needles 3 on the pole wire body 2, connecting one end of the pole wire body 2 with one end of the round steel 1, connecting the other end of the pole wire body 2 with one end of the round steel 2 8, inserting the other end of the round steel 2 8 into the frame steel pipe 4 until the end face of the other end of the pole wire body 2 contacts the outer side face of the frame steel pipe 4, inserting the other end of the round steel 1 into the frame steel pipe 1 7, connecting the tensioning device 5 with the other end of the round steel 1, fastening the round steel 1 and the frame steel pipe 1 7 through the tensioning device 5, and completing the installation.

[0059] Specifically, the pole wire composed of the round steel 1, the pole wire body 2, the discharge needle 3 and the round steel 2 8 is assembled, and then is assembled with the frame steel pipe 1 7 and the frame steel pipe 4.

[0060] The cathode wire has the functions of quick positioning and preventing rotation of the cathode wire in the cathode frame, is provided with the tensioning device, can ensure that the pole wire does not bend when the cathode frame is transported, hoisted and operated, ensures the pole distance in the operation of the electric dust collector, can select the discharge needle distance and the discharge needle tip end according to the flue gas characteristics, improves the adaptability of the cathode wire to the flue gas and dust characteristics, and improves the efficient operation and stability of the electric dust collector.

[0061] In the description of the present application, it should be understood that if the orientation or position relationship indicated by the terms "upper", "lower", "right", etc. is based on the orientation or position relationship shown in the drawings, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore the terms describing the position relationship in the drawings are only used for exemplary illustration, and cannot be understood as a limitation on the present application.

[0062] The above examples are only illustrative of the present application and do not constitute a limitation on the scope of protection of the present application, any design identical or similar to the present application falls within the scope of protection of the present application.

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. A method of using a cathode wire, characterized in that: The process 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 one (1), the other end of the electrode wire body (2) is connected to one end of round steel two (8), the other end of round steel two (8) is inserted into the frame steel pipe two (4) until the end face of the other end of the electrode wire body (2) contacts the outer side of the frame steel pipe two (4), the other end of round steel one (1) is inserted into the frame steel pipe one (7), and a tensioning device (5) is connected to the other end of round steel one (1). The round steel one (1) and the frame steel pipe one (7) are fastened through the tensioning device (5) to complete the installation.

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