A type of barbed wire and its selection method

Abstract

This invention proposes a plate-type barbed wire and its selection method. The plate-type barbed wire includes a central support plate, discharge barbs, and auxiliary discharge needles. The central support plate has a plurality of discharge barbs spaced along its length on both sides, with the barbs arranged in an alternating pattern. The central support plate also has a plurality of auxiliary discharge needles spaced along its length at its center, with these auxiliary discharge needles also arranged in an alternating pattern with the discharge barbs on both sides of the central support plate. The central support plate has connecting portions at both ends for fixed connection to a cathode frame. This invention also provides a method for selecting the plate-type barbed wire, which allows for various types of central support plates and connecting portions to be configured according to different operating conditions. This method can solve the problems of cathode wire corona shielding and energy waste, and can increase the dust collection area for auxiliary collection of positively charged dust, thereby improving dust removal efficiency and reducing energy consumption.

Description

[Technical Field]

[0001] This invention relates to the technical fields of flue gas pollutant treatment and electrostatic precipitators, and in particular to a plate-type barbed wire and its selection method. [Background Technology]

[0002] The cathode wire is a key component of an electrostatic precipitator, and a reasonable and uniform corona current is the main factor affecting the dust removal efficiency and the reduction of energy consumption of the electrostatic precipitator.

[0003] The mainstream cathode systems in the electrostatic precipitator industry are divided into two main categories: tip discharge and non-tip discharge. Tip discharge cathode wires are characterized by strong discharge. Currently, tip discharge cathode wires on the market all have uneven corona current or even corona shielding problems, resulting in insufficient energy utilization of electrostatic precipitators.

[0004] In addition, while there are a large number of negatively charged dust particles inside the electrostatic precipitator, there are also positively charged dust particles. Existing electrostatic precipitators have almost no space to adsorb positively charged dust particles, so positively charged dust particles cannot be effectively captured. [Summary of the Invention]

[0005] The purpose of this invention is to solve the problems in the prior art by proposing a plate-shaped barbed wire and its selection method. The discharge charge of the plate-shaped barbed wire can be more efficiently adsorbed onto fine particulate matter, which can solve the problems of cathode wire corona shielding and power waste. It can also increase the dust collection area for auxiliary collection of positively charged dust, improve dust removal efficiency, and reduce energy consumption.

[0006] To achieve the above objectives, the present invention proposes a plate-type barbed wire, which includes a central support plate, discharge barbs, and auxiliary discharge needles. The central support plate is a flat plate structure or a concave plate structure with grooves. Several discharge barbs are spaced apart along the length direction on both sides of the central support plate, and the discharge barbs on both sides are staggered. Several auxiliary discharge needles are spaced apart along the length direction at the middle of the central support plate, and the auxiliary discharge needles are staggered with the discharge barbs on both sides of the central support plate. The two ends of the central support plate have connecting parts for fixed connection with the cathode frame.

[0007] Preferably, the middle support plate has a first windproof groove in an approximately U-shape in the middle, the first windproof groove is arranged along the length direction of the middle support plate, and the two sides of the middle support plate have bent edges.

[0008] Preferably, a second windproof groove in an approximately U-shape is provided symmetrically on both sides of the first windproof groove. The second windproof groove is arranged along the length of the middle support plate, and the openings of the first windproof groove and the second windproof groove are arranged in opposite directions.

[0009] Preferably, the discharge spikes are symmetrically provided with first welding holes, and the discharge spikes are welded and fixedly connected to the intermediate support plate through the first welding holes. The discharge spikes have 1 to 4 pairs of discharge spikes, each pair of discharge spikes including two discharge spikes that bend and extend to both sides respectively, and the tip of each discharge spike has an arc with a radius of 0.1 to 0.5 mm.

[0010] Preferably, the distance between two adjacent discharge spikes on the same side of the intermediate support plate is 100mm, and the stagger distance between two adjacent discharge spikes on both sides of the intermediate support plate is 50mm.

[0011] Preferably, the connecting part is a connecting plate, one end of the connecting plate is provided with two clamping plates, and there is a gap between the two clamping plates. The end of the intermediate support plate is fitted into the gap. Multiple second welding holes are provided at intervals on the clamping plates. The clamping plates are welded and fixedly connected to the intermediate support plate through the second welding holes. The other end of the connecting plate is provided with a first mounting hole. The connecting plate is fixedly mounted on the cathode frame by fasteners.

[0012] Preferably, the connecting part is a round screw, and the connection between the round screw and the intermediate support plate is provided with a diameter transition part. The round screw is fixedly installed on the cathode frame by a nut.

[0013] This invention also proposes a method for selecting barbed wire on a plate, which includes selecting the intermediate support plate structure for the barbed wire. The selection of the intermediate support plate structure includes the following two methods:

[0014] Method a, the selection of the intermediate support plate structure is based on the length of the barbs: when the length of the barbs is less than 3 meters, the intermediate support plate is a flat plate structure; otherwise, the intermediate support plate is a concave plate structure with grooves.

[0015] Alternatively, in method b, the selection of the intermediate support plate structure is based on the resistivity of the dust treated by the electrostatic precipitator: when the resistivity of the flue gas dust being treated is 10... 9 ~10 11 At that time, the intermediate support plate is a flat plate structure;

[0016] When the resistivity of the flue gas dust being treated is 10 6 ~10 9 At that time, the intermediate support plate is a concave plate structure with grooves, and the middle part of the intermediate support plate has a first windproof groove;

[0017] When the resistivity of the flue gas dust being treated is 10 4 ~10 6 When the intermediate support plate is a concave plate structure with grooves, the middle part of the intermediate support plate has a first windproof groove, and the two sides of the first windproof groove are symmetrically provided with second windproof grooves.

[0018] Preferably, the selection method also includes the selection of the connection structure at both ends of the intermediate support plate:

[0019] When the length of the barbed wire is more than 3 meters, the connecting part is a round screw. The cathode frame has through holes. The round screws at both ends of the barbed wire are installed into the through holes of the cathode frame, and the barbed wire is stretched and tightened to give it a certain prestress. Then, the barbed wire is fixed to the cathode frame with nuts.

[0020] When the length of the barbed wire is less than 3 meters, the connecting part is a connecting plate. The cathode frame has a round hole, so that the first mounting hole of the connecting plate is aligned with the round hole on the cathode frame. Then, the connecting plate and the cathode frame are fixedly connected by nuts and bolts. The connecting plate and the intermediate support plate are connected by plug welding.

[0021] The beneficial effects of this invention are:

[0022] 1. The structural design greatly improves the uniformity of corona discharge. Compared with existing cathode wires on the market, the discharge charge can be more efficiently adsorbed onto fine particles, solving the problems of cathode wire corona shielding and energy waste. Therefore, the dust removal efficiency is increased and the energy consumption is reduced.

[0023] 2. Good adaptability to modification. The cathode wires of existing electrostatic precipitators are almost all linear, which makes modification simple. Only the cathode wires need to be replaced. There is no need to change the cathode frame and anode plate, and the modification cost is low.

[0024] 3. The two ends of the barbed wire are connected by nuts and are pre-tensioned during installation. This overcomes the problem that installation errors can cause the barbed wire to be in a non-straight state, resulting in different distances from each discharge point to the anode plate (especially for flexible cathode wires, which use steel plates as the main cathode wire in this invention, making them flexible cathode wires). This leads to a decrease in the discharge performance of most discharge points, thereby reducing the dust removal efficiency.

[0025] 4. The plane of the middle support plate of the barbed wire is parallel to the electrode plate, which helps to collect positively charged dust, increases the dust collection area of ​​the electrostatic precipitator, and has the advantages of improved dust removal efficiency, cost saving and reduced equipment footprint.

[0026] The features and advantages of the present invention will be described in detail through embodiments and in conjunction with the accompanying drawings. [Attached Image Description]

[0027] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the plate-type barbed wire of the present invention;

[0028] Figure 2 This is a sectional view along line AA of Embodiment 1 of the plate-shaped barbed wire of the present invention;

[0029] Figure 3 This is a schematic cross-sectional view along direction AA of Embodiment 2 of the plate-shaped barbed wire of the present invention;

[0030] Figure 4 This is a cross-sectional view along direction AA of embodiment 3 of the plate-shaped barbed wire of the present invention;

[0031] Figure 5 This is a schematic diagram of the structure of Embodiment 4 of the plate-type barbed wire of the present invention;

[0032] Figure 6 This is a cross-sectional view of the connecting plate of Embodiment 4 of the present invention, which is a plate-type barbed wire.

Detailed Implementation Methods

[0033] Example 1

[0034] See Figure 1 , Figure 2 This invention discloses a plate-type barbed wire, which includes a central support plate 1, discharge barbs 2, and auxiliary discharge needles 3. The central support plate 1 has a plurality of discharge barbs 2 spaced along its length on both sides, with the discharge barbs 2 on both sides arranged in an alternating pattern. The central support plate 1 also has a plurality of auxiliary discharge needles 3 spaced along its length at its center, with the auxiliary discharge needles 3 alternating with the discharge barbs 2 on both sides of the central support plate 1. The central support plate 1 has connecting portions at both ends for fixed connection to a cathode frame.

[0035] Furthermore, the discharge spikes are fixed by welding. Specifically, the discharge spikes 2 are symmetrically provided with first welding holes 20, and the discharge spikes 2 are welded and fixed to the intermediate support plate 1 through the first welding holes 20. The characteristics of this type are: low cost and simple manufacturing. Of course, the discharge spikes can also be integrally formed. Specifically, on a flat plate material, a groove is first punched in the middle of the plate, and then spikes are punched on both sides of the plate, forming an integral shape. The characteristics of this type are: the discharge spikes and the intermediate support plate are integrated, the discharge spikes are not easy to fall off (in conventional electrostatic precipitators, the cathode wires need to be vibrated and cleaned, and in a corrosive flue gas environment, the spikes are prone to falling off, thus losing some discharge points), the cost is higher, and the manufacturing requirements are higher.

[0036] Furthermore, the discharge spike 2 has 1 to 4 pairs of discharge spikes. Specifically, the discharge spike 2 has two pairs of discharge spikes, each pair including two discharge spikes that bend and extend to both sides respectively, with two discharge spikes on the outer side and two on the inner side. The distance between the outer discharge spikes and the centerline of the intermediate support plate is S: 50-75mm, with an allowable deviation of ±1mm (e.g., ...). Figure 2(As shown). This distance effectively prevents excessive superposition of discharge spikes, thus avoiding energy waste and corona shielding. In addition, the tip of each discharge spike has an arc with a radius of 0.1 to 0.5 mm, which keeps the current density at the point where the spikes face each other within the most reasonable range, thus solving the problem of energy waste.

[0037] Furthermore, the distance between two adjacent discharge spikes 2 on the same side of the intermediate support plate 1 is 100mm, and the stagger distance between two adjacent discharge spikes 2 on both sides of the intermediate support plate 1 is 50mm.

[0038] Furthermore, the intermediate support plate 1 is a flat plate structure, avoiding corona discharge in the middle area of ​​the original tube shield of the existing circular tube-type cathode wire, thus solving the corona shielding problem and improving the utilization rate of the dust removal area of ​​the electrostatic precipitator, thereby increasing the dust removal efficiency. In addition, the plane of the intermediate support plate is set perpendicular to the electric field, which helps to collect positively charged dust, increasing the dust collection area of ​​the electrostatic precipitator, improving dust removal efficiency, or reducing the size of the electrostatic precipitator. This offers advantages such as improved dust removal efficiency, cost savings, and reduced equipment footprint.

[0039] Furthermore, the connecting part is a round screw 5, and the connection between the round screw 5 and the intermediate support plate 1 is provided with a diameter transition part 50. The round screw 5 is fixedly installed on the cathode frame by a nut.

[0040] Example 2

[0041] See Figure 3 The difference from Embodiment 1 is that the intermediate support plate 1 is a concave plate structure with a groove. The middle part of the intermediate support plate 1 has a first windproof groove 11 that is approximately U-shaped, and the first windproof groove 11 is arranged along the length direction of the intermediate support plate 1. The two sides of the intermediate support plate 1 have bent edges 12.

[0042] Example 3

[0043] See Figure 4 The difference from Embodiment 2 is that the first windproof groove 11 is provided with a second windproof groove 110 that is approximately U-shaped on both sides. The second windproof groove 110 is arranged along the length of the middle support plate 1, and the openings of the first windproof groove 11 and the second windproof groove 110 are arranged in opposite directions.

[0044] Example 4

[0045] See Figure 5 , Figure 6Based on embodiments 1, 2, or 3, the connecting part uses a connecting plate 4 instead of the round screw 5. Specifically, one end of the connecting plate 4 has two clamping plates 41 with a gap between them. The end of the intermediate support plate 1 is fitted into the gap. Multiple second welding holes 410 are spaced apart on the clamping plates 41. The clamping plates 41 are welded and fixedly connected to the intermediate support plate 1 through the second welding holes 410. The other end of the connecting plate 4 has a first mounting hole 42. The connecting plate 4 is fixedly mounted on the cathode frame using fasteners. This commonly used connecting plate structure can improve the strength of the connection between the barbed wire and the cathode frame, thus giving the barbed wire sufficient structural stability.

[0046] A method for selecting a barbed wire pattern, the method including selecting the structure of the intermediate support plate 1 of the barbed wire pattern, wherein the selection of the intermediate support plate 1 structure includes the following two methods:

[0047] Method a, the selection of the intermediate support plate 1 structure is based on the length of the barbs: when the length of the barbs is less than 3 meters, the intermediate support plate 1 is a flat plate structure, such as... Figure 1 , Figure 2 As shown,

[0048] When the length of the barbed wire exceeds 3 meters, the intermediate support plate 1 is a concave plate structure with grooves. The strength can be improved by setting grooves on the intermediate support plate. Figure 3 , Figure 4 As shown; specifically, the intermediate support plate 1 is made of steel plate, with the two sides of the steel plate folded and the middle pressed into a groove to improve the strength of the cathode wire, effectively transmit the acceleration during the cathode wire vibration cleaning, improve the cleaning effect and the performance of the electrode wire not being pulled apart.

[0049] Alternatively, in method b, the selection of the intermediate support plate 1 structure is based on the resistivity of the dust treated by the electrostatic precipitator: when the resistivity of the treated flue gas dust is 10... 9 ~10 11 At that time, the intermediate support plate 1 is a flat plate structure, such as... Figure 1 , Figure 2 As shown;

[0050] When the resistivity of the flue gas dust being treated is 10 6 ~10 9 At this time, it is easy to cause secondary dust. The intermediate support plate 1 adopts a concave plate structure with grooves. The middle part of the intermediate support plate 1 is bent to form the first windproof groove 11. Figure 3 As shown;

[0051] When the resistivity of the flue gas dust being treated is 10 4 ~10 6When dust adhesion is low, secondary dust is easily generated. The intermediate support plate 1 adopts a concave plate structure with grooves, creating multiple windproof grooves in the steel plate. Specifically, the intermediate support plate 1 has a first windproof groove 11 in the middle, and second windproof grooves 110 are symmetrically arranged on both sides of the first windproof groove 11. Figure 4 As shown.

[0052] Furthermore, the selection method also includes the selection of the connection structure at both ends of the intermediate support plate 1:

[0053] When the length of the barbed wire is 3 meters or more, the connecting part adopts a round screw 5 structure, such as... Figure 1 As shown, the cathode frame has through holes. The round screws 5 at both ends of the barbed wire are installed into the through holes of the cathode frame, stretching and tightening the barbed wire to create a certain prestress. The barbed wire is then fixed to the cathode frame with nuts. The barbed wire has a certain degree of elasticity. During installation, after the round screws 5 of the barbed wire pass through the through holes of the cathode frame, one end is fixedly connected first, and the other end, after passing through the through hole, is first tightened before the nut at that end is spot-welded to ensure the wire is in a taut state. Furthermore, nut washers are installed on the round screws at both ends of the barbed wire. Because the wire is prone to detachment under vibration, the nut washers improve stability.

[0054] The round screws at both ends of the barbed wire and the middle support plate are integrated into a single unit.

[0055] The characteristics of this connection method are: when the barbs are long, the stiffness of the barbs is low and they are prone to deformation, which leads to a reduction in the interpole spacing. By pre-stretching to generate prestress, the barbs can be kept straight, thus improving stability.

[0056] When the length of the barbed wire is less than 3 meters, the connecting part adopts a connecting plate 4 structure, such as... Figure 5 , Figure 6 As shown, the cathode frame has a round hole, so that the first mounting hole 42 of the connecting plate 4 is aligned with the round hole on the cathode frame. The connecting plate 4 and the cathode frame are then fixedly connected by nuts and bolts. The connecting plate 4 and the intermediate support plate 1 are connected by plug welding.

[0057] The characteristics of this connection method are: connecting plates are set at both ends of the barbed wire, and plug welding is used, resulting in low cost. The barbed wire is connected to the cathode frame with nuts and bolts, making installation simple.

[0058] The above embodiments are illustrative of the present invention and are not intended to limit the present invention. Any simple modifications to the present invention are within the scope of protection of the present invention.

Claims

1. A method of selecting a plate thorn barbed wire, characterized by: The plate thorn sting line comprises a middle support plate (1), a discharge thorn (2) and an auxiliary discharge needle (3), the middle support plate (1) is a flat plate structure or a concave plate structure with grooves, a plurality of discharge thorns (2) are arranged at intervals along the length direction on both sides of the middle support plate (1), the discharge thorns (2) on both sides are arranged in an interlaced manner, a plurality of auxiliary discharge needles (3) are arranged at intervals along the length direction at the middle of the middle support plate (1), the auxiliary discharge needles (3) are arranged in an interlaced manner with the discharge thorns (2) on both sides of the middle support plate (1), both ends of the middle support plate (1) are provided with connecting parts, and the connecting parts are used for being fixedly connected with a cathode frame; A first welding hole (20) is symmetrically arranged on the discharge thorn (2), the discharge thorn (2) is fixedly connected with the middle support plate (1) through the first welding hole (20), the discharge thorn (2) has two pairs of discharge thorns, each pair of discharge thorns comprises two discharge thorns which are respectively bent and extended to both sides, the tip of each discharge thorn has a circular arc with a radius of 0.1-0.5 mm, the spacing S between the outer discharge thorn and the middle line of the middle support plate is 50-75 mm, and the allowable deviation is ±1 mm; The connecting part is a connecting plate (4) or a round screw (5); The selection of the structure of the middle support plate (1) comprises the following two modes: Mode a, the selection of the structure of the middle support plate (1) is based on the length of the plate thorn sting line: when the length of the plate thorn sting line is less than 3 meters, the middle support plate (1) is a flat plate structure, otherwise, the middle support plate (1) is a concave plate structure with grooves; Or, in mode b, the selection of the structure of the intermediate support plate (1) is based on the dust specific resistance of the dust treated by the electric dust collector: when the dust specific resistance of the flue gas treated is 10 9 ~10 11 , the intermediate support plate (1) is a flat plate structure; When the processed flue dust specific resistance is 10 6 10 9 When the processed flue dust specific resistance is 10 When the processed flue dust specific resistance is 10 When the processed flue dust specific resistance is 10 When the processed flue dust specific resistance is 10 When the processed flue dust specific resistance is 10 When the processed flue dust specific resistance is 10 When the processed flue dust specific resistance is 10 When the processed flue dust specific resistance is 10 When the processed flue dust specific resistance is 10 When the processed flue dust specific resistance is 10 When the processed flue dust specific resistance is 10 When the processed flue dust specific resistance is 10 When the processed flue dust specific resistance is 10 When the processed flue dust specific resistance is 10 When the processed flue dust specific resistance is 10 When the processed flue dust specific resistance is 10 When the processed flue dust specific resistance is 10 When the processed flue dust specific resistance is 10 When the processed flue dust specific resistance is When the processed flue dust specific resistance is 10 4 10 6 When the processed flue dust specific resistance is 10 When the processed flue dust specific resistance is 10 When the processed flue dust specific resistance is 10 When the processed flue dust specific resistance is 10 When the processed flue dust specific resistance is 10 When the processed flue dust specific resistance is 10 When the processed flue dust specific resistance is 10 When the processed flue dust specific resistance is 10 When the processed flue dust specific resistance is 10 When the processed flue dust specific resistance is 10 When the processed flue dust specific resistance is 10 When the processed flue dust specific resistance is 10 When the processed flue dust specific resistance is 10 When the processed flue dust specific resistance is 10 When the processed flue dust specific resistance is 10 When the processed flue dust specific resistance is 10 When the processed flue dust specific resistance is 10 When the processed flue dust specific resistance is 10 When the processed flue dust specific resistance is 10 When the processed flue dust specific resistance is 10 When the processed flue dust specific resistance is 10 When the processed flue dust specific resistance is 10 When the processed flue dust specific resistance is 10 When the processed flue dust specific resistance is 10 When the processed flue dust specific resistance is 10 When the processed flue dust specific resistance is 10 When the processed flue dust specific resistance is 10 When the processed flue dust specific resistance is 10 When the processed flue dust specific resistance is 10 When the processed flue dust specific resistance is 10 When the processed flue dust specific resistance is 10 When the processed flue dust specific resistance is 10 When the processed flue dust The selection of the structure of the connecting part at both ends of the middle support plate (1) comprises: When the length of the plate thorn sting line is more than 3 meters, the connecting part is a round screw (5), the cathode frame is provided with a through hole, the round screw (5) at both ends of the plate thorn sting line is installed into the through hole of the cathode frame, the plate thorn sting line is stretched and tensioned, the plate thorn sting line has a certain prestress, the plate thorn sting line is fixed to the cathode frame through a nut, and a variable-diameter transition part (50) is arranged at the connection between the round screw (5) and the middle support plate (1); When the length of the plate thorn sting line is less than 3 meters, the connecting part is a connecting plate (4), the cathode frame is provided with a circular hole, the first mounting hole (42) of the connecting plate (4) is aligned with the circular hole of the cathode frame, and then the connecting plate (4) and the cathode frame are fixedly connected through a nut and a bolt, the connecting plate (4) and the middle support plate (1) are connected through plug welding, one end of the connecting plate (4) is provided with two clamping plates (41), the clamping plates (41) are provided with a clamping gap therebetween, the end of the middle support plate (1) is clamped into the clamping gap, a plurality of second welding holes (410) are arranged at intervals on the clamping plates (41), the clamping plates (41) are fixedly connected with the middle support plate (1) through the second welding holes (410), and the other end of the connecting plate (4) is provided with a first mounting hole (42), and the connecting plate (4) is fixedly installed on the cathode frame through a fastener.

2. The selection method of claim 1, wherein: The distance between two adjacent discharge spines (2) on the same side of the intermediate support plate (1) is 100 mm, and the staggered distance between two adjacent discharge spines (2) on both sides of the intermediate support plate (1) is 50 mm.

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