Composite limiting device for preventing swing of cathode frame

Abstract

The utility model provides a kind of composite limiting device for preventing cathode frame swing, it is related to electrostatic precipitator component technical field, including electrostatic precipitator shell, multiple parallel anode plate and multiple groups of cathode frame are installed in electrostatic precipitator shell inside;The cathode frame includes multiple barb wires, the bottom bar is connected at the end of barb wire, multiple frame rods are arranged between bottom bar and top bar, multiple frame rods are connected in series with multiple barb wires, reinforcing rod is connected on bottom bar, sleeve pipe is fixed in the both ends of reinforcing rod, insulating rod is fixed on sleeve pipe, two anti-swing plates are vertically installed on electrostatic precipitator shell, baffle is fixed between two anti-swing plates, insulating rod end is on baffle, insulating rod is between two anti-swing plates, limit cathode frame movement;Two cross bars are fixed in the inside of two electrostatic precipitator shells, multiple connecting rods are vertically fixed on cross bar, connecting rod is fixedly connected with frame rod, and rigid support is provided for the middle part of cathode frame, and the bending stiffness is improved.

Description

Technical Field

[0001] This application relates to the technical field of electrostatic precipitator components, specifically to a composite limiting device for preventing the cathode frame from swinging. Background Technology

[0002] In industrial flue gas treatment systems, electrostatic precipitators, with their core advantages of "large air volume handling capacity, high dust removal efficiency, and controllable operating costs," have become the core environmental protection equipment for achieving particulate matter emission reduction in heavily polluting industries such as thermal power plants, metallurgy, and chemicals. The cathode frame of the electrostatic precipitator is connected to a high-voltage power supply via a top insulator, creating a uniform 60-80kV high-voltage electric field between the anode and cathode. This electric field ionizes the air, generating electrons and ions. Dust particles in the flue gas attract these charges as they pass through. The charged dust particles then move towards the anode plate with the opposite polarity under the influence of the electric field, and are ultimately captured by the anode plate. The purified flue gas is then discharged from the precipitator outlet.

[0003] As the core load-bearing component of the high-voltage electric field in an electrostatic precipitator, the performance of the cathode frame directly determines the dust removal efficiency and equipment lifespan. However, traditional cathode frame designs have the following problems: First, in order to avoid interference with other components and ensure uniform electric field and airflow, the traditional cathode frame adopts a structure design with the bottom completely suspended. In actual working conditions, when faced with the weight difference caused by uneven dust accumulation, the local impact force generated by flashover, and the asymmetric fluid force brought about by airflow disturbance, the frame is prone to swinging around the top suspension point because it has no bottom support and cannot offset the unilateral tension. After the swing amplitude increases, it can easily lead to changes in the electrode spacing or even short circuit.

[0004] Secondly, during the operation of an electrostatic precipitator, the peak value of the secondary current is a key indicator for ensuring the effectiveness of flashover control. When this peak value is below 2V, the power supply's ability to identify and regulate flashover will significantly decrease, making it unable to suppress flashover propagation in time, thus generating a momentary "overshoot current". This current will exert an asymmetric momentary impact force on the cathode frame, breaking the original force balance of the frame, exacerbating its momentary force imbalance, and further amplifying the risk of swaying.

[0005] In addition, traditional cathode frames are fixed only by the top hanging structure, leaving the bottom in a free state without support. Furthermore, there are no rigid connecting parts in the middle of the frame, making it resemble a "cantilever beam". This makes it unable to resist the unilateral torque generated during operation, which can easily cause deflection deformation in the middle, further aggravating frame sway and structural damage.

[0006] Some technologies suppress swaying by adding bottom limiting blocks, but these blocks are prone to thermal deformation in the high-temperature environment of the dust collector, leading to limiting failure. Simultaneously, the bottom limiting blocks interfere with airflow and electric field distribution, disrupting electric field uniformity and reducing local dust removal efficiency. While local reinforcement solutions (such as adding metal tie rods) can improve rigidity, the metal tie rods are conductive and can easily form conductive paths with the cathode frame, shell, or anode plate, causing current leakage or even directly leading to short circuits. This compromises the insulation performance of the high-voltage electric field and fails to meet the equipment's operational requirements. Utility Model Content

[0007] In order to solve at least one of the technical defects mentioned above, this application provides a composite limiting device for preventing the cathode frame from swinging.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a composite limiting device for preventing the cathode frame from swinging, comprising an electrostatic precipitator housing, wherein multiple parallel anode plates and multiple sets of cathode frames are installed inside the electrostatic precipitator housing; The cathode frame includes multiple top rods, each connected to a multiple barbed wire. The barbed wire is located between two adjacent anode plates. The ends of the barbed wires are connected to bottom rods. Multiple frame rods are arranged between the bottom rods and the top rods. The multiple frame rods connect the multiple barbed wires in series. A reinforcing rod is connected to the bottom rod. Both ends of the reinforcing rod are fixed with sleeves. An insulating rod is fixed to the sleeves. Two anti-sway plates are vertically installed on the electrostatic precipitator shell. A baffle is fixed between the two anti-sway plates. The end of the insulating rod rests on the baffle, and the insulating rod is located between the two anti-sway plates. The electrostatic precipitator housing has two horizontal bars fixed inside, and multiple connecting rods are vertically fixed on each of the two horizontal bars. The connecting rods are fixedly connected to the frame rods.

[0009] Furthermore, the cathode frame includes multiple top rods, which are suspended and installed above the interior of the electrostatic precipitator housing, with each top rod positioned above the middle of the two anode plates.

[0010] Furthermore, the reinforcing rod is located on the side of multiple anode plates, perpendicular to multiple base rods, and the multiple base rods are fixedly connected to the reinforcing rod by welding.

[0011] Furthermore, the barbs are perpendicular to the frame rods and extend downwards, and the multiple frame rods are parallel to each other and perpendicular to the barbs.

[0012] Furthermore, the sleeve has an installation hole on its circumferential surface, and the insulating rod has a positioning hole on its circumferential surface. A bolt passes through the installation hole and the positioning hole, and a nut is screwed onto the end of the bolt. The insulating rod is fixedly installed in the sleeve by the bolt and the nut.

[0013] Furthermore, the two crossbars are parallel, with their ends fixed to both sides of the electrostatic precipitator housing. The crossbars are located to the side of the anode plate and are perpendicular to the anode plate.

[0014] Furthermore, the connecting rod is arranged opposite to the frame rod, and the end of the connecting rod is fixedly connected to the end of the frame rod by welding.

[0015] Furthermore, the insulating rod is made of polytetrafluoroethylene (PTFE) with a diameter of not less than 30mm, and its length can be customized and adjusted according to the cathode frame spacing. Furthermore, the contact area between the bolts / nuts and the cathode frame is fitted with an insulating sleeve.

[0016] Compared with the prior art, the beneficial effects of this utility model are: 1. By strengthening the end of the rod and fixing the sleeve, and fixing the insulating rod in the sleeve, in conjunction with the anti-sway plate and baffle limiter inside the electrostatic precipitator shell, the movement of the cathode frame is restricted, avoiding swaying caused by dust accumulation, flashover or airflow disturbance, and preventing changes in electrode spacing or short circuits; the insulating rod can also prevent conductivity, avoiding the insulation risks of traditional metal rods.

[0017] 2. By fixing two parallel crossbars inside the electrostatic precipitator housing and welding them to the middle of the cathode frame via connecting rods, rigid support is provided for the middle of the cathode frame, solving the problem of the traditional frame having no support in the middle and being unable to resist unilateral torque, thus improving bending stiffness. Attached Figure Description

[0018] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings: Figure 1 A schematic diagram of the planar structure of the composite limiting device for preventing the cathode frame from swaying, provided in an embodiment of this application; Figure 2 A three-dimensional structural schematic diagram of the composite limiting device for preventing the cathode frame from swaying, provided in an embodiment of this application; Figure 3 This is a schematic diagram of the structure at point A provided in an embodiment of this application; Figure 4 This is a schematic diagram of the planar structure of the connection and fixing method between the sleeve and the insulating rod provided in the embodiments of this application; Reference numerals in the attached drawings: 1. Electrostatic precipitator housing; 2. Anode plate; 3. Frame rod; 4. Barbed wire; 5. Bottom rod; 6. Reinforcing rod; 7. Sleeve; 8. Insulating rod; 9. Anti-sway plate; 10. Baffle; 11. Crossbar; 12. Connecting rod. Detailed Implementation

[0019] To make the technical solutions and advantages of the embodiments of this application clearer, the exemplary embodiments of this application will be described in further detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not an exhaustive list of all embodiments. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.

[0020] See Figures 1-4 As shown, to address the aforementioned problems, this application provides a composite limiting device to prevent the cathode frame from swaying. The device includes an electrostatic precipitator housing 1, which is a rectangular frame structure. A dust hopper is installed below the electrostatic precipitator housing 1. Multiple anode plates 2 and multiple sets of cathode frames are installed inside the electrostatic precipitator housing 1. The anode plates 2 are vertically installed inside the electrostatic precipitator housing 1, and the multiple anode plates 2 are parallel to each other, forming electrode channels with consistent spacing.

[0021] Each cathode frame includes multiple push rods, which are suspended and mounted above the interior of the electrostatic precipitator housing 1, with each push rod positioned above the electrode channel formed by two anode plates 2.

[0022] Below each top rod are multiple barbed wires 4, which extend downwards perpendicular to the frame rods 3. The ends of the barbed wires 4 are connected to a bottom rod 5, which is parallel to the top rod. Between the bottom rods 5 and the top rods are multiple parallel frame rods 3, perpendicular to the barbed wires 4, connecting the barbed wires 4 in series. At this point, the barbed wires 4 and the frame rods 3 form a mesh structure located between the two anode plates 2.

[0023] A reinforcing rod 6 is connected to the bottom rod 5. The reinforcing rod 6 is located on the side of multiple anode plates 2. The reinforcing rod 6 is perpendicular to multiple bottom rods 5. The multiple bottom rods 5 and the reinforcing rod 6 are fixedly connected by welding so that the individual mesh structure forms a whole.

[0024] After the high-voltage power supply is turned on, an ionization space is formed in the electrode channel between the anode plate 2 and the cathode barbed wire 4. When the dust-laden flue gas enters the interior of the electrostatic precipitator shell 1, the dust is quickly charged by the ions in the ionization space. Subsequently, the charged dust moves toward the anode plate 2 and is adsorbed under the action of the electric field force, thus achieving dust removal.

[0025] In actual operation, when the cathode frame is subjected to uneven dust accumulation, impact forces from flashover, or asymmetric fluid forces from airflow disturbances, it is prone to swaying around the top suspension point. The barbed wire 4, fixed to the frame rod 3 of the cathode frame, will sway synchronously with the cathode frame.

[0026] Therefore, sleeves 7 are fixed at both ends of the reinforcing rod 6, and an insulating rod 8 is sleeved in the middle of each sleeve 7. An installation hole is opened on the circumferential surface of the sleeve 7, and a positioning hole is opened on the circumferential surface of the insulating rod 8. The installation hole is aligned with the positioning hole, and a bolt passes through between the installation hole and the positioning hole. A nut is screwed to the end of the bolt, and the insulating rod 8 is fixedly installed in the sleeve 7 by the bolt and the nut.

[0027] Two anti-sway plates 9 are vertically installed on the electrostatic precipitator housing 1. The anti-sway plates 9 are fixed to the electrostatic precipitator housing 1 by welding. A baffle 10 is vertically fixed between the two anti-sway plates 9. The baffle 10 is parallel to the electrostatic precipitator housing 1. The end of the insulating rod 8 rests on the baffle 10 and is located between the two anti-sway plates 9.

[0028] At this time, the cathode frame as a whole will be restricted within the electrostatic precipitator housing 1 by the anti-sway plate 9 and the baffle, preventing it from moving back and forth.

[0029] It is important to note that the insulating rod 8 is made of polytetrafluoroethylene (PTFE) with a diameter of no less than 30mm to ensure stable rigid support and effectively transmit the forces between adjacent cathode frames, thus dispersing tension. The insulating rod 8 must have a temperature resistance of no less than 200℃ to ensure that it does not soften, deform, or experience insulation performance degradation under long-term high-temperature environments, maintaining structural stability and insulation reliability. The surface roughness Ra of the insulating rod 8 must be controlled to 3.2μm or less. Reducing surface roughness improves surface smoothness, reduces dust adhesion sites, and ensures long-term stable operation of the insulating rod 8. Furthermore, the length of the insulating rod 8 can be customized and adjusted according to the actual cathode frame spacing.

[0030] To address the issue of the lack of rigid connection in the middle of the cathode frame, which makes it unable to resist unilateral torque, two horizontal bars 11 are installed inside the two electrostatic precipitator housings 1. The two horizontal bars 11 are parallel to each other, and their ends are fixed to the two sides of the electrostatic precipitator housing 1. The horizontal bars 11 are located on the side of the anode plate 2, and their axes are perpendicular to the anode plate 2.

[0031] A connecting rod 12 is vertically fixed on the crossbar 11. The connecting rod 12 is positioned opposite to the frame rod 3, and the end of the connecting rod 12 is fixedly connected to the end of the frame rod 3 by welding. The two crossbars 11 fix the middle position of the cathode frame, thereby improving the bending stiffness.

[0032] In addition, to prevent direct contact between bolts, nuts and other metal connectors and the cathode frame, which could cause current leakage or short circuit, an insulating sleeve is fitted at the contact points between the bolts, nuts and the cathode frame. The insulating sleeve is made of polytetrafluoroethylene, with a thickness of not less than 5 mm and a breakdown voltage of not less than 20 kV / mm, in order to meet the insulation protection requirements of the electrostatic precipitator under the high-voltage electric field environment.

[0033] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0034] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A composite limiting device for preventing cathode frame swaying, characterized in that: It includes an electrostatic precipitator housing (1), and multiple parallel anode plates (2) and multiple sets of cathode frames are installed inside the electrostatic precipitator housing (1). The cathode frame includes multiple top rods, with multiple barbed wires (4) connected to the top rods. The barbed wires (4) are located between two adjacent anode plates (2). The ends of the barbed wires (4) are connected to bottom rods (5). Multiple frame rods (3) are set between the bottom rods (5) and the top rods. The multiple frame rods (3) connect the multiple barbed wires (4) in series. The bottom rods (5) are connected to reinforcing rods (6). Both ends of the reinforcing rods (6) are fixed with sleeves (7). An insulating rod (8) is fixed on the sleeves (7). Two anti-sway plates (9) are vertically installed on the electrostatic precipitator housing (1). A baffle (10) is fixed between the two anti-sway plates (9). The end of the insulating rod (8) rests on the baffle (10), and the insulating rod (8) is located between the two anti-sway plates (9). The electrostatic precipitator housing (1) has two horizontal bars (11) fixed inside, and multiple connecting rods (12) are vertically fixed on each of the two horizontal bars (11). The connecting rods (12) are fixedly connected to the frame rods (3).

2. The composite limiting device for preventing cathode frame swaying according to claim 1, characterized in that: The cathode frame includes multiple top rods, which are suspended and installed above the interior of the electrostatic precipitator housing (1), with each top rod located above the middle of the two anode plates (2).

3. The composite limiting device for preventing cathode frame swaying according to claim 1, characterized in that: The reinforcing rod (6) is located on the side of multiple anode plates (2), and the reinforcing rod (6) is perpendicular to multiple bottom rods (5). The multiple bottom rods (5) are fixedly connected to the reinforcing rod (6) by welding.

4. The composite limiting device for preventing cathode frame swaying according to claim 1, characterized in that: The barb line (4) is perpendicular to the frame rod (3) and extends downwards. Multiple frame rods (3) are parallel to each other and perpendicular to the barb line (4).

5. The composite limiting device for preventing cathode frame swaying according to claim 1, characterized in that: The sleeve (7) has an installation hole on its circumference and the insulating rod (8) has a positioning hole on its circumference. A bolt passes through the installation hole and the positioning hole, and a nut is screwed onto the end of the bolt. The insulating rod (8) is fixedly installed in the sleeve (7) by the bolt and the nut.

6. The composite limiting device for preventing cathode frame swaying according to claim 1, characterized in that: The two crossbars (11) are parallel to each other, and the two ends of the crossbars (11) are fixed on both sides of the electrostatic precipitator housing (1). The crossbars (11) are located on the side of the anode plate (2) and are perpendicular to the anode plate (2).

7. The composite limiting device for preventing cathode frame swaying according to claim 1, characterized in that: The connecting rod (12) is arranged opposite to the frame rod (3), and the end of the connecting rod (12) is fixedly connected to the end of the frame rod (3) by welding.

8. The composite limiting device for preventing cathode frame swaying according to claim 1, characterized in that: The insulating rod (8) is made of polytetrafluoroethylene and has a diameter of not less than 30 mm. The length of the insulating rod (8) can be customized and adjusted according to the cathode frame spacing.

9. A composite limiting device for preventing cathode frame swaying according to claim 5, characterized in that: The contact points between the bolts / nuts and the cathode frame are fitted with insulating sleeves.

Images