A discharge ring cathode wire and its installation structure

Abstract

The present invention proposes a discharge ring cathode wire and its installation structure. The discharge ring cathode wire includes an intermediate rod and a discharge ring. The discharge ring is arranged at intervals along the length of the intermediate rod. The discharge ring includes a plurality of ring bodies with gradually increasing diameters arranged sequentially from the inside to the outside. A plurality of intermediate support ribs are connected between two adjacent ring bodies. The discharge ring cathode wire has high dust removal efficiency and is not prone to breakage. The installation structure of the discharge ring cathode wire includes a plurality of discharge ring cathode wires and a plurality of rows of cathode frames. The cathode frames are arranged at intervals from top to bottom along the height direction. Each discharge ring cathode wire is installed between two adjacent rows of cathode frames. The plurality of discharge ring cathode wires in the height direction are connected end to end to form a string of discharge ring cathode wires. This achieves the arrangement of cathode wires and corresponding discharge rings at the corresponding anode plates below the bottom row of cathode frames and above the top row of cathode frames, fully utilizing the anode plate area and achieving high space utilization.

Description

Technical field

[0001] The invention relates to the technical field of flue gas pollutant treatment, in particular to a discharge ring cathode wire and an installation structure thereof. [Background Technology]

[0002] The cathode wire is the core component of the electrostatic precipitator that generates the electric field. Through high-voltage access, the cathode wire is charged with negative high voltage to form a high-voltage negative potential. Through the grounded zero-potential anode plate, a high-voltage electric field is formed under a high potential difference. When the negatively charged particles pass through the high-voltage electric field, they are adsorbed to the anode plate by the electric field force, thereby removing fine particulate matter from the flue gas and achieving the purpose of dust removal.

[0003] The existing cathode wires are mainly of two types: tip discharge and non-tip discharge. Typical examples of tip discharge cathode wires are thorn wires and needle wires. Tip discharge cathode wires can generate a large number of negative ions that are adsorbed on the surface of particles, charging the particles. When used in the front electric field, the particles can be effectively charged. However, the tip discharge cathode wire cannot form a high electric field due to the strong tip discharge. It is suitable for use in the front electric field of the electrostatic precipitator, but cannot achieve the high dust removal efficiency of the final electric field. In addition, due to the formation of a large secondary current due to corona discharge, there is a disadvantage of high energy consumption. Non-tip discharge cathode wires are typically spiral wires, which can form a high-voltage electric field. However, due to the spring structure, they are prone to fatigue under the action of the cleaning vibration force. Coupled with the influence of flue gas corrosion, etc., they are prone to breakage. After the breakage, the entire electric field fails. In addition, there are the disadvantages of high installation quality and material quality requirements and low stability.

[0004] In summary, conventional cathode wires have the following disadvantages:

[0005] 1. The existing tip discharge cathode wire cannot form a high electric field, has high energy consumption, cannot achieve high dust removal efficiency, and has a bottleneck effect on the outlet particle concentration.

[0006] 2. The existing non-sharp discharge cathode wire has the disadvantages of easy disconnection, high material quality requirements, high cost, and high installation quality requirements.

[0007] 3. There are no cathode lines at the corresponding anode plates below the bottom row of cathode frames and above the top row of cathode frames. There are invalid areas of the anode plates, and the space utilization rate is low. [Summary of the invention]

[0008] The purpose of the present invention is to solve the problems in the prior art and to provide a discharge ring cathode wire and its installation structure. The discharge ring cathode wire has high dust removal efficiency, is not easy to break, and has high space utilization.

[0009] To achieve the above-mentioned objectives, the present invention proposes a discharge ring cathode wire, which includes an intermediate rod and a discharge ring. The discharge rings are arranged at intervals along the length direction of the intermediate rod. The discharge ring includes a plurality of ring bodies with gradually increasing diameters arranged in sequence from the inside to the outside, and a plurality of intermediate support ribs are connected between adjacent ring bodies.

[0010] Preferably, the intermediate rod includes an upper straight segment arranged at its head end, a lower straight segment arranged at its tail end, and a non-straight segment arranged between the upper straight segment and the lower straight segment.

[0011] Preferably, the non-straight line segment is an arc segment.

[0012] Preferably, the intermediate rod is made of round steel bars or ribbed steel bars.

[0013] Preferably, the axes of the ring bodies on the discharge ring coincide with each other, the innermost ring body on the discharge ring is sleeved on the outside of the middle rod, and the two are fixedly connected, and the middle support ribs are distributed in a circular pattern.

[0014] Preferably, the discharge ring is provided with two ring bodies, including an inner ring and an outer ring, and the inner ring and the outer ring are connected by a plurality of intermediate supporting ribs distributed along the circumference.

[0015] The present invention also proposes an installation structure for discharge ring cathode wires, comprising a plurality of discharge ring cathode wires and a plurality of rows of cathode frames, wherein the cathode frames are arranged at intervals from top to bottom along the height direction, and each discharge ring cathode wire is installed between two adjacent rows of cathode frames, and a plurality of discharge ring cathode wires in the height direction are connected end to end to form a string of discharge ring cathode wires.

[0016] Preferably, discharge ring cathode wires are arranged below the bottom row of cathode frames and above the top row of cathode frames at the corresponding anode plates, penetrating the cathode frames and extending outwards, and each extending discharge ring cathode wire is provided with a plurality of discharge rings.

[0017] Preferably, the cathode frame is provided with a plurality of mounting holes for the discharge ring cathode wires to pass through at intervals along its length direction. The plurality of cathode frames and the plurality of strings of discharge ring cathode wires mounted on the cathode frames form a cathode system.

[0018] Preferably, the cathode frame is suspended on the top of the electrostatic precipitator through a porcelain sleeve and is connected to a high-voltage power supply to form a negative high-voltage potential.

[0019] Beneficial effects of the present invention:

[0020] 1. The corona inception voltage is high, which can form a high electric field and effectively remove particulate matter in the flue gas.

[0021] 2. The supporting structure has good rigidity, is not easy to break, and has high product stability.

[0022] 3. It has rigid-elastic properties, and can efficiently remove adsorbed dust during vibration cleaning. It has good vibration acceleration response characteristics and transfer characteristics, which can achieve efficient cleaning effects.

[0023] 4. It has the characteristics of high secondary voltage and low secondary current, low operating power and high utilization rate of electric energy, thus achieving obvious energy saving effect.

[0024] 5. Since the discharge ring can be added on site after the cathode line is installed, the cathode line and the corresponding discharge ring are arranged at the corresponding anode plates below the bottom row of cathode frames and above the top row of cathode frames, making full use of the anode plate area and achieving high space utilization.

[0025] 6. Simple processing. The discharge ring can be manufactured by extrusion, wire braiding or casting, etc., with the advantages of mass production, fatigue resistance and corrosion resistance. The middle support rod is directly processed with HRB steel bars, which has the advantages of easy access to raw materials and low cost, good strength and material saving.

[0026] 7. Good adaptability for transformation. The transformation of the anode plate of the existing electrostatic precipitator is simple. It only requires replacing the cathode line without changing other components such as the cathode and shell. The transformation cost is low.

[0027] The features and advantages of the present invention will be described in detail through embodiments with reference to the accompanying drawings.

Brief Description of the Drawings

[0028] Figure 1 This is a schematic structural diagram of a discharge ring cathode line of the present invention;

[0029] Figure 2 This is a view of the cathode line of a discharge ring of the present invention along the direction perpendicular to the flue gas;

[0030] Figure 3 This is a view of a discharge ring cathode line parallel to the direction of smoke in the present invention;

[0031] Figure 4 This is a schematic structural diagram of a mounting structure for a discharge ring cathode line according to the present invention;

[0032] Figure 5 This is a schematic diagram of a cathode system of a mounting structure for a discharge ring cathode line of the present invention. [Specific implementation method]

[0033] See Figures 1 to 3The present invention discloses a discharge ring cathode wire comprising an intermediate rod 1 and discharge rings 2. The discharge rings 2 are spaced apart along the length of the intermediate rod 1. The spacing between the discharge rings 2 can be set based on the flue gas characteristics and the electric field position (the position along the flue gas electric field). The discharge rings 2 comprise a plurality of ring bodies 20 of gradually increasing diameter, arranged from the inside out. A plurality of intermediate support ribs 23 connect adjacent ring bodies 20.

[0034] Further, see Figure 2 The intermediate rod 1 includes an upper straight segment 11 at its head end, a lower straight segment 12 at its tail end, and a non-straight segment 13 disposed between the upper straight segment 11 and the lower straight segment 12. In this embodiment, the non-straight segment 13 is an arc segment, and the intermediate rod 1 is made of round steel bars or ribbed steel bars.

[0035] The cathode line is perpendicular to the smoke direction as shown in the figure Figure 2 As shown, the cathode wire and the anode plate are arranged in parallel, and the cathode wire and the anode plate directly form a relatively vertical electric field. In the direction perpendicular to the electric field (also perpendicular to the flue gas direction), the cathode wire is processed into an arc segment with a certain curvature, and the two ends of the cathode wire remain straight. The advantage of the cathode wire arc segment is that the arc segment is formed in a directional manner, avoiding the formation of a large non-parallelism in the direction perpendicular to the electric field due to material defects, which makes the inter-electrode spacing unstable and affects the formation of a high electric field. On the other hand, since the middle rod is made of steel bars with good rigidity, it can form a certain elasticity after forming an arc shape, so that the cleaning vibration force can be better transmitted. It can also ensure that the cathode wire has a certain tension when installed in series, thereby improving the quality of the pole wire installation.

[0036] Further, see Figure 1 The axes of the ring bodies 20 on the discharge ring 2 coincide with each other. The innermost ring body 20 of the discharge ring 2 is sleeved onto the exterior of the intermediate rod 1, and the two are fixedly connected. The intermediate support ribs 23 are distributed circumferentially. Specifically, in this embodiment, the discharge ring 2 is provided with two ring bodies 20, including an inner ring 21 and an outer ring 22. The inner ring 21 and the outer ring 22 are connected by a plurality of intermediate support ribs 23 distributed along the circumference. The discharge ring 2 can be manufactured by extrusion, steel wire braiding, or casting.

[0037] See Figure 4 A mounting structure for a discharge ring cathode wire includes a plurality of discharge ring cathode wires and a plurality of rows of cathode frames 3. The cathode frames 3 are arranged at intervals from top to bottom along the height direction. Each discharge ring cathode wire is installed between two adjacent rows of cathode frames 3. The plurality of discharge ring cathode wires in the height direction are connected end to end to form a string of discharge ring cathode wires.

[0038] During installation, several discharge ring cathode wires in the vertical direction (height direction) (shown as three in the upper, middle, and lower sections) are first threaded through the mounting holes of the cathode frame 3. The discharge ring cathode wires are then fixed to each other to form a string of discharge ring cathode wires. The top end of the string of discharge ring cathode wires is then fixed, and the bottom end of the string of discharge ring cathode wires is pulled to form a certain tension. Finally, all mounting points of the string of discharge ring cathode wires and the cathode frame 3 are fixed. The advantages of this installation type and method are that the discharge ring cathode wires have sufficient tension to ensure high accuracy of cathode spacing over a long period of time, while also delivering sufficient cleaning and vibrating force.

[0039] Further, see Figure 5 Discharge ring cathode wires are arranged below the bottom row of cathode frames 3 and above the top row of cathode frames 3 at the corresponding anode plates 4, penetrating the cathode frames 3 and extending outward, and each of the extending discharge ring cathode wires is provided with a number of discharge rings 2.

[0040] Further, see Figure 5 The cathode frame 3 is provided with a plurality of mounting holes for the discharge ring cathode wires to pass through, spaced apart along its length direction. A plurality of cathode frames 3 and a plurality of strings of discharge ring cathode wires mounted on the cathode frames 3 form a cathode system.

[0041] Further, see Figure 5 The cathode frame 3 is suspended on the top of the electrostatic precipitator through a porcelain sleeve 5 and is connected to a high-voltage power supply 6 to form a negative high-voltage potential.

[0042] The above embodiments are intended to illustrate the present invention, not to limit the present invention. Any solution that is a simple transformation of the present invention falls within the protection scope of the present invention.

Claims

1. A discharge ring cathode wire, characterized in that: The discharge ring cathode line comprises an intermediate rod (1) and a discharge ring (2), wherein the discharge ring (2) is arranged at intervals along the length direction of the intermediate rod (1), and the discharge ring (2) comprises a plurality of ring bodies (20) with gradually increasing diameters arranged in sequence from the inside to the outside, and a plurality of intermediate support ribs (23) are connected between two adjacent ring bodies (20), the intermediate rod (1) comprises an upper straight segment (11) arranged at its head end, a lower straight segment (12) arranged at its tail end, and a non-straight segment (13) arranged between the upper straight segment (11) and the lower straight segment (12), wherein the non-straight segment (13) is an arc segment, and the intermediate rod (1) is made of round steel bars or ribbed steel bars, and the axes of the ring bodies (20) on the discharge ring (2) coincide with each other, and the innermost ring body (20) on the discharge ring (2) is sleeved on the outside of the intermediate rod (1), and the two are fixedly connected, and the intermediate support ribs (23) are distributed circumferentially.

2. The discharge ring cathode wire according to claim 1, characterized in that: The discharge ring (2) is provided with two ring bodies (20), including an inner ring (21) and an outer ring (22), and the inner ring (21) and the outer ring (22) are connected via a plurality of intermediate support ribs (23) distributed along the circumference.

3. A mounting structure for a discharge ring cathode line according to any one of claims 1 to 2, characterized in that: The invention comprises a plurality of discharge ring cathode wires and a plurality of rows of cathode frames (3), wherein the cathode frames (3) are arranged at intervals from top to bottom along the height direction, and each discharge ring cathode wire is installed between two adjacent rows of cathode frames (3), and the plurality of discharge ring cathode wires in the height direction are connected end to end to form a string of discharge ring cathode wires.

4. The mounting structure of the discharge ring cathode wire according to claim 3, characterized in that: Discharge ring cathode lines that penetrate the cathode frames (3) and extend outward are arranged below the bottom row of cathode frames (3) and at the corresponding anode plates (4) above the top row of cathode frames (3), and each of the extended discharge ring cathode lines is provided with a plurality of discharge rings (2).

5. The mounting structure of the discharge ring cathode wire according to claim 3, characterized in that: The cathode frame (3) is provided with a plurality of mounting holes for the discharge ring cathode wires to pass through, which are arranged at intervals along its length direction. The plurality of cathode frames (3) and the plurality of strings of discharge ring cathode wires mounted on the cathode frames (3) form a cathode system.

6. The mounting structure of the discharge ring cathode wire according to claim 3, characterized in that: The cathode frame (3) is suspended on the top of the electrostatic precipitator through a porcelain sleeve (5) and is connected to a high-voltage power supply (6) to form a negative high-voltage potential.

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