Wide and narrow pitch wet-type electric dust collection system

Abstract

This invention discloses a wide-narrow spacing wet electrostatic precipitator system, relating to the field of electrostatic precipitator technology; it includes a dust collection box, in which a multi-stage dust collection group is arranged sequentially along the flue gas flow direction. The multi-stage dust collection group consists of multiple first dust collection electrodes, a transition plate, and second dust collection electrodes. The spacing between the first dust collection electrodes is smaller than the spacing between the second dust collection electrodes. An adjustment component includes a frame located between two adjacent first dust collection electrodes. Two rotating shafts are rotatably connected within the frame. An adjustment plate is fixed on the rotating shaft. Multiple adjustment cylinders corresponding to the rotating shafts are slidably connected to the frame. A guide groove is provided at the end of the rotating shaft near the adjustment cylinder. A plug rod inserted into the guide groove is fixed inside the adjustment cylinder. A drive component includes a drive plate fixedly connected to the multiple adjustment cylinders. This invention can prevent dust accumulation in the wide-narrow transition zone.

Description

Technical Field

[0001] This invention relates to the field of electrostatic precipitator technology, and in particular to a wet electrostatic precipitator system with wide and narrow spacing. Background Technology

[0002] An electrostatic precipitator (ESP) is a highly efficient air pollution control device. The working principle of an ESP is to use a high-voltage electric field to ionize flue gas. Inside the ESP are discharge electrodes (negative electrodes) and dust collection electrodes (positive electrodes). When the high-voltage electric field acts on these two electrodes, the gas molecules in the flue gas are ionized, producing a large number of electrons and ions. These ions move towards the electrodes under the influence of the electric field, colliding with dust particles in the airflow during their movement, thus charging them. The charged dust particles separate from the airflow under the influence of the electric field and move towards the electrode plate or line with opposite polarity. Finally, they are adsorbed onto the electrode plate or line by electrostatic force. The water film on the adsorption electrode then adsorbs the ionized dust and allows it to slide off and be collected.

[0003] Currently, the collecting electrodes of electrostatic precipitators are generally composed of multiple parallel flat plate structures, with the discharge electrode located between two collecting electrodes. However, multiple collecting electrodes with fixed spacing can only effectively remove dust at conventional dust concentrations, resulting in poor dust removal efficiency. Furthermore, when using collecting electrodes with wide and narrow spacing for dust removal, although the narrow spacing in the initial stage can comprehensively handle high-concentration coarse dust, and the wide spacing in the final stage can further process the treated dust and improve the dust removal efficiency, dust airflow turbulence is prone to occur at the transition between wide and narrow spacing. This makes it easy for dust that has not been adsorbed by the water film to have its charged trajectory disrupted by the airflow turbulence, causing some charged dust to escape the electric field attraction, reducing the collection rate. At the same time, the vortex causes dust to accumulate at the boundary between the wide and narrow zones, forming a "dust bridge" that blocks the airflow channel.

[0004] Therefore, a wet electrostatic precipitator system with wide and narrow spacing is invented to solve the above problems. Summary of the Invention

[0005] The main objective of this invention is to provide a wet electrostatic precipitator system with wide and narrow spacing, which can effectively solve the technical problems in the background art.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a wide and narrow spacing wet electrostatic precipitator system, including a dust collection box, wherein the dust collection box is provided with a multi-stage dust collection group arranged sequentially along the flue gas flow direction, the multi-stage dust collection group is composed of multiple first dust collection electrodes, a transition plate and a second dust collection electrode, wherein the spacing between the first dust collection electrodes is smaller than the spacing between the second dust collection electrodes.

[0007] An adjustment assembly includes a frame located between two adjacent first dust collection electrodes. Two rotating shafts are rotatably connected within the frame. An adjustment plate is fixed on the rotating shaft. A plurality of adjustment cylinders corresponding to the rotating shafts are slidably connected to the frame. A guide groove is provided at one end of the rotating shaft near the adjustment cylinder. A plug rod inserted into the guide groove is fixed inside the adjustment cylinder for adjusting the two adjustment plates to switch states.

[0008] The guiding assembly includes a plurality of guide plates slidably connected to the second dust collection electrode, wherein the guide plates slide and adjust the distance between themselves and the frame when the adjusting plate swings.

[0009] A drive assembly includes a drive plate fixedly connected to a plurality of the adjusting cylinders, the drive plate being slidably connected to the dust collector box, and the frame being fixedly connected to the drive plate via an electric push rod.

[0010] Preferably, the adjustment assembly includes an adjustment rod fixedly connected to the guide plate, the free end of the adjustment rod being slidably connected to the corresponding frame, a sliding groove being provided in the frame, the adjustment rod being slidably connected to the sliding groove, an air cavity coaxial with the adjustment cylinder being provided in the frame, a push ring being slidably connected to the circumferential side of the adjustment cylinder being fixedly connected in the air cavity, and the sliding groove communicating with the air cavity.

[0011] Preferably, the side of the guide plate closest to the frame is an arc-shaped surface, and the side of the guide plate furthest from the frame is an inclined surface, which is used to guide the dust airflow to diffuse smoothly.

[0012] Preferably, protective plates are fixed at both ends of the guide plate near the second dust collecting electrode. The protective plates are slidably connected to the corresponding second dust collecting electrode to seal the gap between the guide plate and the second dust collecting electrode. An elastic element is provided between the protective plate and the second dust collecting electrode.

[0013] Preferably, the guide groove is composed of a first arc-shaped groove, a vertical groove, and a second arc-shaped groove from top to bottom, and the two second arc-shaped grooves on the same frame and close to the adjustment plate have different directions.

[0014] Preferably, when the insertion rod is located in the vertical groove, the two adjustment plates are parallel to the first dust collection electrode. When the insertion rod slides into the first arc-shaped groove, the two adjustment plates swing synchronously to guide the flow direction of the dust airflow. When the insertion rod slides into the second arc-shaped groove, the two adjustment plates swing synchronously relative to each other, so that the two adjustment plates form a cone shape to disperse the dust airflow.

[0015] Preferably, the first dust collecting electrode is equipped with a concentration sensor for detecting the concentration of dust, and the concentration sensor is electrically connected to the electric push rod through a control panel.

[0016] Preferably, the dust collection box is provided with a cathode assembly, the cathode assembly including a support frame fixedly connected to the dust collection box, and the support frame is provided with a plurality of vertically extending cathode wires located between the multi-stage dust collection groups for ionizing dust.

[0017] Preferably, the dust collection box is equipped with a spray assembly, which includes multiple water pipes corresponding to the first dust collection electrode and the second dust collection electrode. Multiple nozzles are provided on the side of the water pipes near the multi-stage dust collection group for spraying liquid onto the surfaces of the first dust collection electrode and the second dust collection electrode to form a water film.

[0018] Preferably, the dust collector has an inlet cone and an exhaust cone arranged sequentially at both ends along the flue gas flow direction, and the bottom of the dust collector is provided with an ash hopper that communicates with its interior for collecting dust.

[0019] The technical effects and advantages of this invention are as follows:

[0020] This invention, through the coordinated arrangement of an adjusting plate, a guide plate, a guide groove, a plug rod, and a drive assembly, not only enables the two adjusting plates to swing in opposite directions, increasing the residence time of the dust airflow, but also adjusts the relative distance between the guide plate and the adjusting plate. This allows the dust airflow exiting the two adjusting plates to flow smoothly under the action of the guide plate, preventing the separation of the dust airflow boundary layer, reducing airflow turbulence in the wide-narrow transition zone, and preventing dust accumulation in the wide-narrow transition zone from blocking the airflow channel. At the same time, the adjusting plate can guide the airflow direction in the wide-narrow spacing transition zone, ensuring a smooth airflow transition and efficient dust collection, further ensuring the smoothness of the dust airflow in the wide-narrow spacing transition zone. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 This is a bottom sectional view of the present invention;

[0023] Figure 3 For the present invention Figure 2 A magnified view of a section at point A in the middle;

[0024] Figure 4 This is a full sectional view of the overall structure of the present invention;

[0025] Figure 5 This is a schematic diagram of the structure of the adjustment component and the drive component in this invention;

[0026] Figure 6This is a schematic diagram of the structure of the adjustment component and the guide component in this invention;

[0027] Figure 7 This is a structural schematic diagram of the adjustment component and the guide component from another perspective in this invention;

[0028] Figure 8 This is a cross-sectional view of the adjustment component in this invention;

[0029] Figure 9 This is a schematic diagram showing the unfolded structure of the adjustment component in this invention;

[0030] Figure 10 For the present invention Figure 9 A magnified view of a section at point B in the middle.

[0031] In the diagram: 1. Dust collector; 101. Inlet cone; 102. Exhaust cone; 103. Ash hopper;

[0032] 2. Multi-stage dust collection group; 201. First dust collection electrode; 202. Transition plate; 203. Second dust collection electrode;

[0033] 3. Adjustment assembly; 301. Frame; 302. Rotating shaft; 303. Adjustment plate; 304. Adjustment cylinder; 305. Guide groove; 3051. First arc-shaped groove; 3052. Vertical groove; 3053. Second arc-shaped groove; 306. Insert rod; 307. Adjustment rod; 308. Slide groove; 309. Air chamber; 310. Push ring;

[0034] 4. Guiding components; 401. Guiding plate; 402. Protective plate; 403. Elastic element;

[0035] 5. Drive assembly; 501. Drive board; 502. Electric actuator; 503. Concentration sensor;

[0036] 6. Cathode assembly; 601. Support frame; 602. Cathode wire;

[0037] 7. Sprinkler assembly; 701. Water pipe; 702. Sprinkler head. Detailed Implementation

[0038] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] Example 1

[0040] like Figures 1 to 10As shown, this embodiment provides a wet electrostatic precipitator system with wide and narrow spacing, including a dust collection box 1. The dust collection box 1 is provided with a multi-stage dust collection group 2 arranged sequentially along the flue gas flow direction. The multi-stage dust collection group 2 is composed of multiple first dust collection electrodes 201, a transition plate 202 and a second dust collection electrode 203. The spacing between the first dust collection electrodes 201 is smaller than the spacing between the second dust collection electrodes 203.

[0041] The dust collector 1 is equipped with a cathode assembly 6. The cathode assembly 6 includes a support frame 601 fixedly connected to the dust collector 1. The support frame 601 is provided with a plurality of vertically extending cathode wires 602 located between the multi-stage dust collection groups 2 for ionizing dust.

[0042] The dust collection box 1 is equipped with a spray assembly 7, which includes multiple water pipes 701 corresponding to the first dust collection electrode 201 and the second dust collection electrode 203. Multiple nozzles 702 are provided on the side of the water pipes 701 near the multi-stage dust collection group 2 for spraying liquid onto the first dust collection electrode 201 and the second dust collection electrode 203 to form a water film.

[0043] Dust collector 1 has an inlet cone 101 and an exhaust cone 102 arranged sequentially at both ends along the flue gas flow direction. The bottom of dust collector 1 is provided with a dust hopper 103 that communicates with its interior for collecting dust.

[0044] In operation, the cathode wire 602 is first energized, and liquid is sprayed onto the surfaces of the first dust collecting electrode 201 and the second dust collecting electrode 203 through the water pipe 701 and the nozzle 702. Under the ionization effect of the cathode wire 602, a water film is formed on the surfaces of the first dust collecting electrode 201 and the second dust collecting electrode 203. The first dust collecting electrode 201 and the second dust collecting electrode 203 are each composed of multiple electrode plates that are adjacent to each other. At the same time, dust-laden airflow flows into the dust collector 1 through the air inlet cone 101. When the dust-laden airflow enters the narrow flow channel composed of multiple first dust collecting electrodes 201, the high voltage of the cathode wire 602 is energized. Corona discharge charges the dust particles. Under the influence of the electric field, the charged dust particles are adsorbed onto the surface of the first dust collecting electrode 201. The water film on the first dust collecting electrode 201 absorbs the charged dust particles. Under the action of the sprayed liquid and its own gravity, the liquid carries the dust particles through the first dust collecting electrode 201 and the second dust collecting electrode 203 and slides into the ash hopper 103 for collection. Finally, the airflow after being dusted by the first dust collecting electrode 201 and the second dust collecting electrode 203 passes through the purification component and is discharged to the outside through the exhaust cone 102. The purification component is existing technology, and its specific structure and connection method will not be described in detail.

[0045] Example 2

[0046] During use, it was found that when the dust airflow flows from the first dust collecting electrode 201 to the wide-narrow transition zone between the first dust collecting electrode 201 and the second dust collecting electrode 203, the channel cross-section suddenly expands and the flow velocity drops sharply when the airflow enters the wide-narrow gap zone from the narrow gap zone, resulting in boundary layer separation and the formation of a low-pressure vortex zone in the transition zone. This causes the dust airflow to become turbulent, and the vortex causes dust to accumulate at the junction of the wide and narrow gap zones, forming a "dust bridge" that blocks the airflow channel. Therefore, further improvements were made based on the above embodiment.

[0047] like Figures 3 to 10 As shown, the adjustment assembly 3 includes a frame 301 located between two adjacent first dust collection electrodes 201. Two rotating shafts 302 are rotatably connected inside the frame 301. Adjustment plates 303 are fixed on the rotating shafts 302. Multiple adjustment cylinders 304 corresponding to the rotating shafts 302 are slidably connected to the frame 301. A guide groove 305 is provided at one end of the rotating shaft 302 near the adjustment cylinder 304. An insert rod 306 is fixed inside the adjustment cylinder 304 and inserted into the guide groove 305 for adjusting the two adjustment plates 303 to switch states.

[0048] The guide assembly 4 includes a plurality of guide plates 401 slidably connected to the second dust collection electrode 203. When the adjustment plate 303 swings, the guide plates 401 slide and adjust the distance between them and the frame 301.

[0049] The drive assembly 5 includes a drive plate 501 fixedly connected to a plurality of adjusting cylinders 304, the drive plate 501 being slidably connected to the dust collection box 1, and the frame 301 being fixedly connected to the drive plate 501 via an electric push rod 502.

[0050] The adjustment assembly 3 includes an adjustment rod 307 fixedly connected to the guide plate 401. The free end of the adjustment rod 307 is slidably connected to the corresponding frame 301. A groove 308 is provided in the frame 301. The adjustment rod 307 is slidably connected to the groove 308. An air chamber 309 coaxial with the adjustment cylinder 304 is provided in the frame 301. A push ring 310 fixedly connected to the circumferential side of the adjustment cylinder 304 is slidably connected in the air chamber 309. The groove 308 communicates with the air chamber 309.

[0051] The guide plate 401 has an arc-shaped surface on the side closest to the frame 301 and an inclined surface on the side furthest from the frame 301, which is used to guide the dust airflow to diffuse smoothly.

[0052] Protective plates 402 are fixed at both ends of the guide plate 401 near the second dust collecting electrode 203. The protective plates 402 are slidably connected to the corresponding second dust collecting electrode 203 to seal the gap between the guide plate 401 and the second dust collecting electrode 203. An elastic element 403 is provided between the protective plate 402 and the second dust collecting electrode 203.

[0053] The guide groove 305 is composed of a first arc groove 3051, a vertical groove 3052 and a second arc groove 3053 from top to bottom. The two second arc grooves 3053 on the same frame 301 and close to the adjustment plate 303 have different directions.

[0054] When the insertion rod 306 is located in the vertical groove 3052, the two adjusting plates 303 are in a state parallel to the first dust collecting electrode 201. When the insertion rod 306 slides into the first arc-shaped groove 3051, the two adjusting plates 303 swing synchronously to guide the flow direction of the dust airflow. When the insertion rod 306 slides into the second arc-shaped groove 3053, the two adjusting plates 303 swing synchronously relative to each other, so that the two adjusting plates 303 form a cone shape to disperse the dust airflow.

[0055] The first dust collecting electrode 201 is equipped with a concentration sensor 503 for detecting the concentration of dust. The concentration sensor 503 is electrically connected to the electric push rod 502 through the control panel.

[0056] In use, when the concentration sensor 503 detects a high dust concentration at the first dust collecting electrode 201, the concentration sensor 503 drives the electric push rod 502 via the control panel to slide the drive plate 501 towards the frame 301. The drive plate 501 then drives the adjusting cylinder 304 to slide downwards along the frame 301. The adjusting cylinder 304 then drives the insertion rod 306 to slide along the vertical groove 3052 on the guide groove 305 into the second arc-shaped groove 3053. Since the two second arc-shaped grooves 3053 on the same frame 301 have different directions, the concentration sensor 503 adjusts the dust concentration at the first dust collecting electrode 201. The cylinder 304 drives two rotating shafts 302 to rotate in opposite directions via the insertion rod 306 and the second arc-shaped groove 3053. The two rotating shafts 302 drive two adjusting plates 303 to swing in opposite directions into a V-shape with their openings facing the second dust collecting electrode 203. This increases the residence time of the dust airflow at the first dust collecting electrode 201. The two adjusting plates 303 guide the dust airflow with increased velocity as it swings to the inclined surface, reducing the problem of airflow turbulence caused by sudden changes in velocity, preventing dust from accumulating in the wide-narrow transition zone, and reducing the impact on the airflow channel.

[0057] Simultaneously, the adjusting cylinder 304 drives the push ring 310 to slide downward along the air chamber 309, causing the push ring 310 to draw gas from the slide groove 308 into the air chamber 309. At this time, the exhaust pressure in the slide groove 308 decreases. Under the action of the elastic element 403, the elastic element 403 drives the guide plate 401 to slide along the second dust collection electrode 203 towards the frame 301. The guide plate 401 drives the adjusting rod 307 to slide along the slide groove 308, thereby reducing the relative distance between the guide plate 401 and the frame 301. Since the side of the guide plate 401 closest to the frame 301 is set with a blunt surface, the dust airflow guided by the two adjusting plates 303 can flow better along the blunt surface of the guide plate 401, reducing the problem of airflow boundary layer separation caused by sudden changes in airflow and avoiding a large amount of dust accumulating in the wide-narrow transition zone.

[0058] When the concentration sensor 503 detects that the concentration of the dust airflow is within the normal range, the concentration sensor 503 drives the electric push rod 502 through the control panel to drive the drive plate 501 to slide upward. The drive plate 501 drives the adjusting cylinder 304 to slide, so that the adjusting cylinder 304 drives the insertion rod 306 to slide along the second arc groove 3053 on the guide groove 305 into the vertical groove 3052. This causes the adjusting plate 303 to swing again to a state parallel to the first dust collecting electrode 201, which facilitates the rapid flow of the dust airflow into the area of ​​the second dust collecting electrode 203. At the same time, the adjusting cylinder 304 drives the push ring 310 to slide upward along the air cavity 309, so that the push ring 310 pushes the gas in the air cavity 309 into the slide groove 308. At this time, the pressure in the slide groove 308 increases and overcomes the elastic force of the elastic element 403. At this time, the gas drives the guide plate 401 to slide along the second dust collecting electrode 203 away from the frame 301 through the adjusting rod 307, thereby increasing the relative distance between the guide plate 401 and the frame 301.

[0059] When the concentration sensor 503 detects a rapid decrease in the concentration of the dust airflow, the concentration sensor 503 drives the electric push rod 502 via the control panel to slide the drive plate 501 upward. The drive plate 501 then drives the regulating cylinder 304 to slide, causing the regulating cylinder 304 to slide the insertion rod 306 along the vertical groove 3052 on the guide groove 305 into the first arc-shaped groove 3051. This causes the regulating cylinder 304 to drive the two rotating shafts 302 to rotate synchronously via the insertion rod 306 and the first arc-shaped groove 3051. The two rotating shafts 302 then drive the two regulating plates 303 to rotate synchronously, causing the regulating plates 303 to change the direction of the dust airflow in the wide-narrow transition zone. After the change, due to the large weight of the large dust particles, the large dust particles can settle earlier. The regulating plates 303 can also rationally distribute the airflow path, avoiding the formation of resistance peaks in local high-speed areas. At the same time, the directional guidance of the regulating plates 303 can achieve a smooth transition of airflow and efficient dust collection in the wide-narrow spacing transition zone.

[0060] In summary, through the coordinated arrangement of the adjusting plate 303, the guide plate 401, the guide groove 305, the insert rod 306, and the drive assembly 5, not only can the two adjusting plates 303 swing in opposite directions to increase the residence time of the dust airflow, but the relative distance between the guide plate 401 and the adjusting plate 303 can also be adjusted. This allows the dust airflow from the two adjusting plates 303 to flow smoothly under the action of the guide plate 401, avoiding separation of the dust airflow boundary layer, reducing airflow turbulence in the wide-narrow transition zone, and preventing dust accumulation in the wide-narrow transition zone from blocking the airflow channel. At the same time, the adjusting plate 303 can guide the airflow direction in the wide-narrow gap transition zone, ensuring a smooth airflow transition and efficient dust collection, further ensuring the smoothness of the dust airflow in the wide-narrow gap transition zone.

[0061] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A wet electrostatic precipitator system with wide and narrow spacing, comprising a dust collection box (1), characterized in that, The dust collector (1) is provided with a multi-stage dust collection group (2) arranged sequentially along the flue gas flow direction. The multi-stage dust collection group (2) is composed of multiple first dust collection electrodes (201), transition plates (202) and second dust collection electrodes (203). The spacing between the first dust collection electrodes (201) is smaller than the spacing between the second dust collection electrodes (203). The adjustment assembly (3) includes a frame (301) located between two adjacent first dust collection electrodes (201). Two rotating shafts (302) are rotatably connected inside the frame (301). An adjustment plate (303) is fixed on the rotating shaft (302). A plurality of adjustment cylinders (304) corresponding to the rotating shaft (302) are slidably connected on the frame (301). A guide groove (305) is provided at one end of the rotating shaft (302) near the adjustment cylinder (304). A plug rod (306) is fixed inside the adjustment cylinder (304) and inserted into the guide groove (305) for adjusting the two adjustment plates (303) to switch states. The guide groove (305) is composed of a first arc groove (3051), a vertical groove (3052), and a second arc groove (3053) from top to bottom. The two second arc grooves (3053) on the same frame (301) and close to the adjustment plate (303) have different directions. When the insertion rod (306) is located in the vertical groove (3052), the two adjustment plates (303) are in a state parallel to the first dust collection electrode (201). When the insertion rod (306) slides into the first arc groove (3051), the two adjustment plates (303) swing synchronously to guide the flow direction of the dust airflow. When the insertion rod (306) slides into the second arc groove (3053), the two adjustment plates (303) swing synchronously relative to each other, so that the two adjustment plates (303) form a cone shape to disperse the dust airflow. The guide assembly (4) includes a plurality of guide plates (401) slidably connected to the second dust collection electrode (203), wherein the guide plates (401) slide and adjust the distance between themselves and the frame (301) when the adjustment plate (303) swings; The drive assembly (5) includes a drive plate (501) fixedly connected to a plurality of the regulating cylinders (304), the drive plate (501) being slidably connected to the dust collection box (1), and the frame (301) being fixedly connected to the drive plate (501) via an electric push rod (502); The first dust collection electrode (201) is equipped with a concentration sensor (503) for detecting the concentration of dust. The concentration sensor (503) is electrically connected to the electric push rod (502) through the control panel.

2. The wide-narrow spacing wet electrostatic precipitator system according to claim 1, characterized in that: The adjustment assembly (3) includes an adjustment rod (307) fixedly connected to the guide plate (401). The free end of the adjustment rod (307) is slidably connected to the corresponding frame (301). A groove (308) is provided in the frame (301). The adjustment rod (307) is slidably connected to the groove (308). An air chamber (309) coaxial with the adjustment cylinder (304) is provided in the frame (301). A push ring (310) fixedly connected to the circumferential side of the adjustment cylinder (304) is slidably connected in the air chamber (309). The groove (308) communicates with the air chamber (309).

3. The wide-narrow spacing wet electrostatic precipitator system according to claim 2, characterized in that: The guide plate (401) has an arc-shaped surface on the side near the frame (301) and an inclined surface on the side away from the frame (301), which is used to guide the dust airflow to diffuse smoothly.

4. The wide-narrow spacing wet electrostatic precipitator system according to claim 3, characterized in that: The guide plate (401) has protective plates (402) fixed at both ends on the side near the second dust collecting electrode (203). The protective plates (402) are slidably connected to the corresponding second dust collecting electrode (203) to seal the gap between the guide plate (401) and the second dust collecting electrode (203). An elastic element (403) is provided between the protective plate (402) and the second dust collecting electrode (203).

5. The wide-narrow spacing wet electrostatic precipitator system according to claim 1, characterized in that: The dust collection box (1) is provided with a cathode assembly (6), which includes a support frame (601) fixedly connected to the dust collection box (1). The support frame (601) is provided with a plurality of vertically extending cathode lines (602) located between the multi-stage dust collection groups (2) for ionizing dust.

6. The wide-narrow spacing wet electrostatic precipitator system according to claim 1, characterized in that: The dust collection box (1) is equipped with a spray assembly (7). The spray assembly (7) includes multiple water pipes (701) corresponding to the first dust collection electrode (201) and the second dust collection electrode (203). Multiple nozzles (702) are provided on the side of the water pipes (701) near the multi-stage dust collection group (2) for spraying liquid onto the surface of the first dust collection electrode (201) and the second dust collection electrode (203) to form a water film.

7. A wide-narrow spacing wet electrostatic precipitator system according to claim 1, characterized in that: The dust collector (1) has an air inlet cone (101) and an air outlet cone (102) arranged sequentially at both ends along the flue gas flow direction. The bottom of the dust collector (1) is provided with a dust hopper (103) that communicates with its interior for collecting dust.

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