A dust suppression and collection device and an electrostatic precipitator

Abstract

This utility model discloses a dust suppression and collection device and an electrostatic precipitator. The dust suppression and collection device includes a dust suppression plate, which is disposed on the side of the anode plate of the electrostatic precipitator near the dust flow outlet. The end of the dust suppression plate extends between two adjacent anode plates and is arc-shaped, extending towards the channel between the anode plates. Based on the configuration of the dust suppression plate, dust flow near the anode plate surface, upon reaching the dust suppression plate, will form a local backflow counterflow, expanding the low-velocity area on the surface and guiding the high-velocity area to the center of the channel. On the one hand, the capture time of charged dust particles is effectively increased, while the cathode wire in the center of the channel is less prone to dust accumulation under high velocity, thus simultaneously improving discharge stability. In practical applications, the plate-shaped dust suppression plate design also avoids the defect of increased load on the anode plate due to dust accumulation in through-holes.

Description

Technical Field

[0001] This utility model relates to the field of dust removal equipment technology, specifically to a dust suppression and collection device and an electrostatic precipitator. Background Technology

[0002] With increasingly stringent environmental emission standards, the requirements for smoke and dust emissions are becoming more and more stringent. In an electrostatic precipitator (ESP), the time during which dust particles are acted upon by the electric field refers to the time from when dust particles enter the electric field until they are captured or leave the field. The dust removal efficiency of an ESP is closely related to the residence time of dust particles within the electric field. Specifically, the flow velocity of the dust stream within the ESP directly affects the residence time of dust particles, while the flow velocity on the anode plate surface determines whether dust particles have sufficient time to be acted upon by the electric field force and thus be adsorbed, captured, and settled by the plates. Typically, the flow velocity of the dust stream within an ESP is between 0.5 and 2.5 m / s. If the flow velocity is too high, the dust particles will not have enough time to be charged and captured before being carried out of the electric field, resulting in a decrease in dust removal efficiency.

[0003] A typical treatment method involves adding a concave, screen-like conductive filter groove at the end of the anode plate, at the same height as the anode plate, and using a rapping system attached to the anode plate for dust removal. However, as operating time increases, the through-holes often become clogged. Long-term dust accumulation leads to electrochemical corrosion of the screen, and the combined weight of the dust accumulation and the conductive filter groove itself increases the load on the anode plate, weakening the transmission of rapping force.

[0004] Another typical approach involves installing a full-channel interception orifice plate within the passage between the two electric fields, along with an independent rapping system for dust removal. While the full-channel interception method aims to reduce the overall dust flow velocity within the electric field, its effect on reducing the dust flow velocity on the local electrode surfaces is limited. Furthermore, dust blockage in the orifice plate under the full-channel interception method often increases the dust flow resistance of the electrostatic precipitator, leading to increased energy consumption.

[0005] In view of this, there is an urgent need to optimize the design of existing electrostatic precipitators in order to effectively improve dust collection efficiency. Utility Model Content

[0006] To solve the above-mentioned technical problems, this utility model provides a dust suppression and collection device and an electrostatic precipitator, which effectively improves dust collection efficiency through structural optimization.

[0007] This utility model provides a dust suppression and collection device for an electrostatic precipitator. The dust suppression and collection device includes a dust suppression plate, which is disposed on the side of the anode plate of the electrostatic precipitator near the dust flow outlet. The end of the dust suppression plate extends between two adjacent anode plates and is arc-shaped, extending toward the channel between the anode plates.

[0008] Optionally, the dust suppression and collection device further includes a drive actuator. The dust suppression plate includes two dust suppression sub-plates, which extend toward the channels on both sides of the anode plate, and the two dust suppression sub-plates are connected to the fixed plate via a movable plate. The fixed plate is fixedly installed, one end of the movable plate is rotatably connected to the fixed plate, and the other end of the movable plate is fixedly connected to the corresponding dust suppression sub-plate. The power output end of the drive actuator is connected to the two dust suppression sub-plates via a transmission connection.

[0009] Optionally, the fixing plate is fixedly connected to the windproof hook of the anode plate near the dust outlet side via an auxiliary fixing plate.

[0010] Optionally, the movable plate and the fixed plate are rotatably connected by a hinge.

[0011] Optionally, the hinge is a limiting hinge.

[0012] Optionally, the two dust suppression sub-plates are mirror images of the extended center line of the anode plate.

[0013] Optionally, the extended end of the dust suppression sub-plate is configured as a curved end.

[0014] Optionally, the drive actuator includes a drive component and two gear and rack transmission mechanisms. The drive component includes two rods, which are correspondingly arranged with the gear and rack transmission mechanism and the dust suppression sub-plate. The gears of the gear and rack transmission mechanism are coaxially fixed with the corresponding rods, and the racks of the gear and rack transmission mechanism are fixed to the leeward side of the corresponding dust suppression sub-plate.

[0015] This utility model also provides an electrostatic precipitator, including a housing and an electric field dust removal zone disposed within the housing, the electric field dust removal zone including an anode plate and a cathode wire arranged at intervals in sequence; it also includes a dust suppression and collection device as described in any one of claims 8, the dust suppression and collection device being disposed on the anode plate near the dust flow outlet side.

[0016] Optionally, the length L2 of the arc-shaped body of the dust suppression sub-plate of the dust suppression plate and the channel width L1 between the two anode plates satisfy the condition: L2 = (1 / 3~1 / 2)L1.

[0017] Compared with existing technologies, this utility model provides a dust suppression and collection device for electrostatic precipitators. The dust suppression plate of this device is positioned on the side of the anode plate near the dust flow outlet. The end of the dust suppression plate extends between two adjacent anode plates in an arc shape, extending towards the channel between the anode plates. Based on the configuration of the dust suppression plate, dust flowing near the anode plate surface reaches the dust suppression plate and forms a local backflow counterflow, expanding the low-velocity area on the surface and guiding the high-velocity area to the center of the channel. On the one hand, the capture time of charged dust particles is effectively increased, while the cathode wire in the center of the channel is less prone to dust accumulation under high velocity, thus simultaneously improving discharge stability. In practical applications, the plate-shaped dust suppression plate design also avoids the defect of increased load on the anode plate caused by dust accumulation in through-holes.

[0018] In an optional embodiment of this invention, the dust suppression plate includes two sub-plates extending towards the channels on both sides of the anode plate, and each sub-plate is rotatably connected to a fixed plate via a movable plate. This configuration allows the dust suppression plate to extend and retract relative to the anode plate to achieve corresponding dust suppression effects, adapting to different dust flow conditions under varying loads and avoiding impact on the internal airflow resistance of the electrostatic precipitator. For example, when the electrostatic precipitator load increases and the dust concentration rises, the two sub-plates expand away from the anode plate, improving the dust flow convection buffering effect through the enlarged dust suppression cross-section. Conversely, when the electrostatic precipitator load decreases and the dust concentration decreases, the two sub-plates retract towards the anode plate, thereby maintaining a stable internal airflow resistance and effectively improving the adaptability of the dust suppression and collection device. Attached Figure Description

[0019] Figure 1 A top view of an electrostatic precipitator provided in an embodiment of this application;

[0020] Figure 2 This is a schematic diagram of the assembly relationship of the dust suppression and collection device provided in the embodiments of this application;

[0021] Figure 3 A schematic diagram illustrating the assembly relationship between the dust suppression and collection device and the dustproof hook provided in the embodiments of this application;

[0022] Figure 4 This is a top view of the dust suppression and collection device provided in the embodiments of this application;

[0023] Figure 5 for Figure 4 A schematic diagram showing the switching of operating conditions for the dust suppression and collection device shown in the figure;

[0024] Figure 6 This is a schematic diagram of the structure of the dust suppression board provided in the embodiments of this application;

[0025] Figure 7This is a schematic diagram of a simulation test of dust flow velocity on the surface of an anode plate based on the embodiments and comparative examples of this application.

[0026] In the picture:

[0027] 10 housing, 101 inlet, 102 outlet, 20 anode plate, 201 windproof hook, 30 cathode wire, 40 dust suppression and collection device, 1 dust suppression plate, 11 dust suppression sub-plate, 111 arc-shaped body, 112 curved end, 2 drive actuator, 21 drive component, 22 rod, 23 gear, 24 rack, 3 movable plate, 4 fixed plate, 5 auxiliary fixed plate, 6 hinge. Detailed Implementation

[0028] To enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] Please see Figure 1 The figure is a schematic diagram of the overall structure of an electrostatic precipitator provided in an embodiment of this application.

[0030] like Figure 1 As shown, the electrostatic precipitator includes a housing 10, an inlet 101, and an outlet 102. An electric field dust removal zone is arranged inside the housing 10. The electric field dust removal zone can have multiple electric fields arranged in sequence. Dust in the airflow can pass through the multiple electric fields in sequence to achieve dust removal.

[0031] The inlet 101 guides the airflow to be dusted into the housing 10 and into the electric field dust removal area. In this embodiment, the inlet 101 is specifically an inlet horn that gradually widens along the airflow direction, and the outlet 102 is specifically an outlet horn that gradually narrows along the airflow direction. Here, "airflow direction" refers to the direction from the housing inlet to the housing outlet, which characterizes the gas flow trend.

[0032] The electric field dust removal zone includes anode plates 20 and cathode wires 30 arranged at intervals to ensure that dust entering the electric field of the dust collector is charged and collected. It should be understood that the area of ​​the electric field dust removal zone shown in the figure is merely illustrative and does not constitute a substantial limitation on the solution of this application.

[0033] The electrostatic precipitator provided in this application embodiment has a dust suppression and collection device 40 installed at the windproof hook 201 near the dust flow outlet side of the anode plate 20 to enhance charging. Please also refer to... Figure 2 and Figure 3 ,in, Figure 2 This is a schematic diagram of the assembly relationship of the dust suppression and collection device provided in the embodiments of this application. Figure 3 This diagram illustrates the assembly relationship between the dust suppression and collection device and the dust hook provided in this embodiment. To simplify the illustration and clearly demonstrate the structural principle of the dust suppression and collection device 40, Figure 2 and Figure 3 The cathode wire is not shown.

[0034] As shown in the figure, the dust suppression and collection device 40 includes a dust suppression plate 1. The end of the dust suppression plate 1 extends between two adjacent anode plates 20 and is arc-shaped, extending towards the channel between the two anode plates 20. In this way, when the dust flow near the surface of the anode plate 20 reaches the dust suppression plate 1, it will form a local backflow counterflow, expanding the low-velocity area on the surface and guiding the high-velocity area to the center of the channel. On the one hand, the capture time of charged dust particles is effectively increased, and the cathode wire 30 (discharge electrode) in the center of the channel is less prone to dust accumulation under high wind speeds, thus simultaneously improving discharge stability. In practical applications, the design of the plate-shaped dust suppression plate 1 also avoids the defect of increased load on the anode plate 20 due to dust accumulation in the through holes.

[0035] To improve the adaptability of the dust suppression and collection device, the dust suppression plate 1 can be further designed as a split, adjustable unit. For example... Figure 2 and Figure 3 As shown, the dust suppression and collection device 40 also includes a drive actuator 2, and the dust suppression plate 1 includes two dust suppression sub-plates 11, which are respectively connected to the fixed plate 4 via a movable plate 3. Preferably, the two dust suppression sub-plates 11 and the corresponding movable plate 3 can be mirrored relative to the extension center line of the anode plate 20 to form a balanced dust suppression effect on both sides of the anode plate 20.

[0036] The fixed plate 4 is fixedly installed, for example, but not limited to, the fixed plate 4 can be fixedly connected to the windproof hook 201 through the auxiliary fixed plate 5. One end of the movable plate 3 is rotatably connected to the fixed plate 4, and the other end of the movable plate 3 is fixedly connected to the corresponding dust suppression sub-plate 11.

[0037] In a specific implementation, the movable plate 3 is rotatably connected to the fixed plate 4 via hinges 6. Preferably, the hinge 6 can be a limiting hinge, so as to also have the function of limiting the rotation position switching. The embodiments in this application are not limited.

[0038] The power output end of the drive actuator 2 is connected to the dust suppression sub-plate 11, thereby driving the dust suppression sub-plate 11 and the movable plate 3 to rotate relative to the fixed plate 4. Please refer to [further details omitted]. Figure 2 , Figure 4 and Figure 5 ,in, Figure 4 This is a top view of the dust suppression and collection device 40 provided in the embodiments of this application. Figure 5 for Figure 4 The diagram shows the switching operation mode of the dust suppression and collection device.

[0039] In this embodiment, the drive actuator 2 may include a drive component 21 and two rack and pinion transmission mechanisms. The drive component 21 includes two rods 22. The gears 23 of each rack and pinion transmission mechanism are coaxially fixed to the corresponding rod 22, and the racks 24 of the rack and pinion transmission mechanisms are fixed to the leeward side of the corresponding dust suppression sub-plate 11. In a specific implementation, the length of the rack 24 can range from 50 mm to 100 mm, meshing with the gears 23 coaxially fixed to the rods 22 to form a translational and telescopic mechanism perpendicular to the surface of the anode plate 20.

[0040] In this way, the driving force output by the drive component 21 can drive the corresponding gear and rack transmission mechanism to move synchronously through the two suspension rods 22, so as to drive the dust suppression sub-plate 11 and the movable plate 3 to rotate relative to the fixed plate 4.

[0041] In other specific implementations, the drive actuator 2 can be implemented using different structures, and is not limited to the structure shown in the figure. It should be understood that as long as it can drive the dust suppression sub-plate 11 to rotate relative to the fixed plate 4, it is within the scope of protection claimed in this application.

[0042] Combination Figure 5 As shown, the dust suppression plate 1 can be controlled to extend and retract in a direction perpendicular to the anode plate 20 by driving the actuator 2, so as to obtain the corresponding dust suppression effect. It can be applied to dust flow conditions under different loads and avoids affecting the airflow resistance inside the electrostatic precipitator.

[0043] For example, when the load on the electrostatic precipitator increases and the dust concentration becomes higher, the drive actuator 2 drives the gear 23 on the boom 22 to rotate. The gear 23, in conjunction with the rack 24, causes the two dust suppression sub-plates 11 to expand in the direction away from the anode plate 20 (as shown in the right figure in the figure), that is, to move in opposite directions. By expanding the dust suppression cross section, the convection buffering effect of the dust flow is improved.

[0044] For example, when the load on the electrostatic precipitator decreases and the dust concentration becomes smaller, the drive actuator 2 can be driven in reverse, causing the two dust suppression sub-plates 11 to retract toward the anode plate 20 respectively (as shown in the left figure in the figure), that is, to move in opposite directions. As a result, the airflow resistance inside the electrostatic precipitator can be kept stable.

[0045] In other possible implementations, if the electrostatic precipitator operates under stable conditions, a translational telescopic mechanism can be selectively configured. That is, the dust suppression plate 1 is directly installed at the windproof hook 201 fixed to the anode plate 20, providing a relatively fixed dust suppression cross-section. The specific details can be determined based on the overall product design requirements; this application does not limit the specific implementation.

[0046] To further improve the local backflow effect, in a specific implementation, the end of the dust suppression plate 1 can be set as a curved end. Please refer to [reference needed]. Figure 6 The figure is a schematic diagram of the structure of the dust suppression board provided in the embodiment of this application.

[0047] like Figure 6 As shown, the radius of curvature R of the arc-shaped body 111 of the dust suppression sub-plate 1 can be 200mm~450mm, and the length L2 of the arc-shaped body can be adaptively configured according to the channel width L1 between the two anode plates 20. For example, but not limited to, L2 = (1 / 3~1 / 2)L1. The radius of curvature r of the curved end 112 at the end of the dust suppression sub-plate 11 can be 50mm~100mm.

[0048] Of course, the curved end 112 can be optionally configured in other possible implementations. The specific configuration can be determined based on the overall product design requirements, and this application does not limit the specific implementation.

[0049] Using a conventional anode plate without the dust suppression and collection device provided in this application embodiment as a comparative example, simulation tests were conducted with the implementation scheme of this application. The simulation test results are as follows: Figure 7 As shown. Among them, Figure 7 Figure (a) shows a schematic diagram of the surface dust flow velocity distribution of a traditional anode plate. Figure 7 Figure (b) shows a schematic diagram of the surface dust flow velocity distribution of the anode plate of the dust suppression and collection device provided in the embodiments of this application.

[0050] The simulation results show that, by applying the implementation scheme of this application, the dust flow velocity on the surface of the anode plate is effectively suppressed by the arc-shaped dust suppression plate. When the dust flow leaves the surface of the anode plate, it counteracts the dust suppression plate to form a local backflow, reducing the dust flow velocity to below 0.5 m / s and expanding the dust resting area on the surface of the electrode plate.

[0051] Based on the dust suppression and collection device provided in this application embodiment, after the dust flow passes through the area where the dust suppression and collection device is located, it can effectively control the dust flow velocity on the surface of the anode plate to decrease, effectively improve the charge rate of dust particles, and ensure that the remaining dust flow resistance in the channel is not disturbed, thus avoiding the extra load caused by dust accumulation in the through holes and ensuring the vibration force transmission of the anode plate.

[0052] In addition to the aforementioned dust suppression and collection device, this application embodiment also provides an electrostatic precipitator. For the dust collection area of ​​the electrostatic precipitator, a dust suppression and collection device 40 can be installed at the windproof hook 201 near the dust flow outlet side of the anode plate 20 to enhance charging.

[0053] It should be understood that other functional components of the electrostatic precipitator can be implemented using existing technologies, and the embodiments in this application are not limited thereto.

[0054] The above are merely preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A dust suppression and collection device for use in an electrostatic precipitator, characterized in that, The dust suppression and collection device includes a dust suppression plate, which is disposed on the side of the anode plate of the electrostatic precipitator near the dust flow outlet. The end of the dust suppression plate extends between two adjacent anode plates and is arc-shaped, extending toward the channel between the anode plates.

2. The dust suppression and collection device according to claim 1, characterized in that, The dust suppression and collection device further includes a drive actuator. The dust suppression plate includes two dust suppression sub-plates, which extend toward the channels on both sides of the anode plate. The two dust suppression sub-plates are connected to the fixed plate via a movable plate. The fixed plate is fixedly installed, one end of the movable plate is rotatably connected to the fixed plate, and the other end of the movable plate is fixedly connected to the corresponding dust suppression sub-plate. The power output end of the drive actuator is connected to the two dust suppression sub-plates via a transmission connection.

3. The dust suppression and collection device according to claim 2, characterized in that, The fixing plate is fixedly connected to the windproof hook on the anode plate near the dust flow outlet side via an auxiliary fixing plate.

4. The dust suppression and collection device according to claim 2, characterized in that, The movable plate and the fixed plate are rotatably connected by a hinge.

5. The dust suppression and collection device according to claim 4, characterized in that, The hinge is a limiting hinge.

6. The dust suppression and collection device according to claim 2, characterized in that, The two dust suppression sub-plates are mirror images of the extended center line of the anode plate.

7. The dust suppression and collection device according to claim 2, characterized in that, The extended end of the dust suppression sub-plate is configured as a curved end.

8. The dust suppression and collection device according to any one of claims 2 to 7, characterized in that, The drive actuator includes a drive component and two gear and rack transmission mechanisms. The drive component includes two rods, which are correspondingly arranged with the gear and rack transmission mechanism and the dust suppression sub-plate. The gears of the gear and rack transmission mechanism are coaxially fixed with the corresponding rods, and the racks of the gear and rack transmission mechanism are fixed to the leeward side of the corresponding dust suppression sub-plate.

9. An electrostatic precipitator, characterized in that, The device includes a housing and an electric field dust removal zone disposed within the housing, the electric field dust removal zone including an anode plate and a cathode wire arranged at intervals in sequence; it also includes a dust suppression and collection device as described in any one of claims 8, the dust suppression and collection device being disposed on the side of the anode plate near the dust flow outlet.

10. The electrostatic precipitator according to claim 9, characterized in that, The length L2 of the arc-shaped body of the dust suppression sub-plate of the dust suppression plate and the channel width L1 between the two anode plates satisfy the condition: L2 = (1 / 3~1 / 2)L1.

Images