Wide-narrow-interval wet type electric precipitation system

Abstract

The invention discloses a wide-narrow-interval wet-type electric precipitation system, and relates to the technical field of electric precipitation. Comprising a dust removal box, multiple stages of dust collection sets are sequentially arranged in the dust removal box in the flue gas flowing direction, each dust collection set is composed of a plurality of first dust collection electrodes, a transition plate and second dust collection electrodes, and the distance between the first dust collection electrodes is smaller than that between the second dust collection electrodes. The dust collection device comprises a frame located between every two adjacent first dust collection electrodes, two rotating shafts are rotationally connected into the frame, adjusting plates are fixed to the rotating shafts, a plurality of adjusting cylinders corresponding to the rotating shafts are slidably connected to the frame, and guide grooves are formed in the ends, close to the adjusting cylinders, of the rotating shafts. Inserting rods inserted into the guide grooves are fixed in the adjusting cylinders, and the driving assembly comprises a driving plate fixedly connected with the multiple adjusting cylinders. Dust accumulation in the wide and narrow transition area can be avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric dust removal, in particular to a wide-narrow interval wet-type electric dust removal system. BACKGROUND

[0002] The electric dust remover is a high-efficiency atmospheric pollution control equipment, and the working principle of the electric dust remover is to make flue gas ionize by using a high-voltage electric field. The electric dust remover has a discharge electrode (negative electrode) and a dust collecting electrode (positive electrode) inside. When the high-voltage electric field acts on the two electrodes, the gas molecules in the flue gas are ionized to generate a large number of electrons and ions. These ions move towards the two poles under the action of the electric field force and collide with the dust particles in the airflow during the movement, so that the dust particles are charged. The charged dust particles are separated from the airflow under the action of the electric field force and move towards the pole plate or pole line with opposite polarity, and are finally adsorbed on the pole plate or pole line by the water film on the adsorbing electrode, so that the ionized dust is adsorbed and collected by the water film.

[0003] At present, the dust collecting electrode of the electric dust remover is generally composed of a plurality of parallel plate structures, and the discharge electrode is arranged between the two dust collecting electrodes. The dust collecting electrodes with a fixed interval can only effectively remove the conventional dust concentration, resulting in poor dust removal effect. When the dust collecting electrodes with wide-narrow intervals are used for dust removal, the dust collecting electrodes with wide-narrow intervals can comprehensively treat high-concentration coarse dust at the front stage of narrow interval, and further treat the treated dust at the last stage of wide interval, thereby improving the dust treatment effect. However, the transition of the dust collecting electrodes with wide-narrow intervals is prone to turbulence of the dust airflow, so that the dust not adsorbed by the water film is easily disturbed by the turbulent airflow to change the charged trajectory, part of the charged dust is separated from the electric field force, and the collection efficiency is reduced. At the same time, the vortex causes the dust to accumulate at the junction of the wide-narrow area to form a "dust bridge" and block the airflow channel.

[0004] Therefore, the present application provides a wide-narrow interval wet-type electric dust removal system to solve the above problems. SUMMARY

[0005] The main purpose of the present application is to provide a wide-narrow interval wet-type electric dust removal system, which can effectively solve the technical problems in the background art.

[0006] To achieve the above purpose, the technical scheme adopted by the present application is as follows: a wide-narrow interval wet-type electric dust removal system, comprising a dust removal box, a plurality of dust collecting groups arranged in sequence along the flue gas flow direction are arranged in the dust removal box, the plurality of dust collecting groups are composed of a plurality of first dust collecting electrodes, a transition plate and a second dust collecting electrode, and the interval of the first dust collecting electrode is smaller than the interval of the second dust collecting electrode. The adjusting assembly comprises a frame between two adjacent first dust collecting electrodes, two rotating shafts are rotatably connected in the frame, adjusting plates are fixed on the rotating shafts, a plurality of adjusting cylinders corresponding to the rotating shafts are slidably connected on the frame, a guide groove is formed on one end of the rotating shaft close to the adjusting cylinder, an inserting rod is fixed in the adjusting cylinder and inserted into the guide groove, and the two adjusting plates are used for state switching; The guide assembly comprises a plurality of guide plates slidably connected with the second dust collecting electrodes, when the adjusting plates swing, the guide plates slide and adjust the distance between the guide plates and the frame; The driving assembly comprises driving plates fixedly connected with the plurality of adjusting cylinders, the driving plates are slidably connected with the dust removal box, and the frame is fixedly connected with the driving plates through an electric push rod.

[0007] Preferably, the adjusting assembly comprises adjusting rods fixedly connected with the guide plates, free ends of the adjusting rods are slidably connected with corresponding frames, a sliding groove is formed in the frame, the adjusting rods are slidably connected with the sliding groove, a gas cavity coaxial with the adjusting cylinder is formed in the frame, a pushing ring fixedly connected with the circumferential side of the adjusting cylinder is slidably connected in the gas cavity, and the sliding groove is in communication with the gas cavity.

[0008] Preferably, one side of the guide plate close to the frame is an arc surface, and the other side of the guide plate away from the frame is an inclined surface, which is used for guiding the gentle diffusion of the dust gas flow.

[0009] Preferably, two ends of one side of the guide plate close to the second dust collecting electrode are respectively fixed with protection plates, the protection plates are slidably connected with corresponding second dust collecting electrodes, which are used for plugging the gap between the guide plate and the second dust collecting electrode, and elastic elements are arranged between the protection plates and the second dust collecting electrodes.

[0010] 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 directions of two second arc-shaped grooves on the same frame and close to the adjusting plates are different.

[0011] Preferably, when the inserting rod is located in the vertical groove, the two adjusting plates are in a state parallel to the first dust collecting electrode, when the inserting rod slides into the first arc-shaped groove, the two adjusting plates swing synchronously to guide the flow direction of the dust gas flow, and when the inserting rod slides into the second arc-shaped groove, the two adjusting plates swing relatively synchronously, so that the two adjusting plates form a cone for dispersing the dust gas flow.

[0012] Preferably, a concentration sensor is arranged on the first dust collecting electrode, which is used for detecting the concentration of dust, and the concentration sensor is electrically connected with the electric push rod through a control panel.

[0013] 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.

[0014] 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.

[0015] 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.

[0016] The technical effects and advantages of this invention are as follows: 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

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a bottom sectional view of the present invention; Figure 3 For the present invention Figure 2 A magnified view of a section at point A in the middle; Figure 4 This is a full sectional view of the overall structure of the present invention; Figure 5 This is a schematic diagram of the structure of the adjustment component and the drive component in this invention; Figure 6 This is a schematic diagram of the structure of the adjustment component and the guide component in this invention; Figure 7 This is a structural schematic diagram of the adjustment component and the guide component from another perspective in this invention; Figure 8 This is a cross-sectional view of the adjustment component in this invention; Figure 9 This is a schematic diagram showing the structure of the adjustment component in this invention; Figure 10 For the present invention Figure 9 A magnified view of a section at point B.

[0018] In the diagram: 1. Dust collector; 101. Inlet cone; 102. Exhaust cone; 103. Ash hopper; 2. Multi-stage dust collection group; 201. First dust collection electrode; 202. Transition plate; 203. Second dust collection electrode; 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; 4. Guiding components; 401. Guiding plate; 402. Protective plate; 403. Elastic element; 5. Drive assembly; 501. Drive board; 502. Electric actuator; 503. Concentration sensor; 6. Cathode assembly; 601. Support frame; 602. Cathode wire; 7. Sprinkler assembly; 701. Water pipe; 702. Sprinkler head. Detailed Implementation

[0019] 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.

[0020] Example 1 like Figures 1 to 10 As 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.

[0021] 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.

[0022] 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.

[0023] 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.

[0024] 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.

[0025] Example 2 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.

[0026] like Figures 3 to 10As 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.

[0027] 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.

[0028] 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.

[0029] 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.

[0030] 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.

[0031] 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.

[0032] 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.

[0033] 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.

[0034] 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.

[0035] 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.

[0036] 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.

[0037] 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.

[0038] 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.

[0039] 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.

[0040] 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 wide and narrow pitch wet-type electric dust collection system including a dust collection tank (1), characterized in that, The dust removal box (1) is provided with multiple-stage dust collection groups (2) arranged in sequence along the flow direction of flue gas, the multiple-stage dust collection groups (2) are composed of multiple first dust collection electrodes (201), transition plates (202) and second dust collection electrodes (203), and the spacing of the first dust collection electrodes (201) is smaller than that of the second dust collection electrodes (203); The adjusting assembly (3) comprises a frame (301) located between two adjacent first dust collection electrodes (201), two rotating shafts (302) are rotatably connected in the frame (301), adjusting plates (303) are fixed on the rotating shafts (302), multiple adjusting cylinders (304) corresponding to the rotating shafts (302) are slidably connected to the frame (301), guide grooves (305) are formed in one end of the rotating shafts (302) close to the adjusting cylinders (304), and plug rods (306) are fixed in the adjusting cylinders (304) and inserted into the guide grooves (305), so as to adjust the state switching of the two adjusting plates (303); The guide assembly (4) comprises multiple guide plates (401) slidably connected to the second dust collection electrodes (203), when the adjusting plates (303) swing, the guide plates (401) slide and adjust the distance between the guide plates (401) and the frame (301); The driving assembly (5) comprises driving plates (501) fixedly connected to the multiple adjusting cylinders (304), the driving plates (501) are slidably connected to the dust removal box (1), and the frame (301) is fixedly connected to the driving plates (501) through electric push rods (502).

2. A wide and narrow pitch wet-type electric dust collection system according to claim 1, characterized in that: The adjusting assembly (3) comprises adjusting rods (307) fixedly connected to the guide plates (401), free ends of the adjusting rods (307) are slidably connected to corresponding frames (301), sliding grooves (308) are formed in the frames (301), the adjusting rods (307) are slidably connected to the sliding grooves (308), air cavities (309) coaxial with the adjusting cylinders (304) are formed in the frames (301), push rings (310) fixedly connected to the circumferential sides of the adjusting cylinders (304) are slidably connected in the air cavities (309), and the sliding grooves (308) are in communication with the air cavities (309).

3. A wide and narrow pitch wet-type electric dust collection system according to claim 2, characterized in that: One side of the guide plate (401) close to the frame (301) is an arc surface, and the other side of the guide plate (401) away from the frame (301) is an inclined surface, so as to guide the gentle diffusion of the dust gas flow.

4. A wide and narrow pitch wet-type electric dust collection system according to claim 3, characterized in that: Two ends of one side of the guide plate (401) close to the second dust collection electrode (203) are fixedly connected with protective plates (402), the protective plates (402) are slidably connected to corresponding second dust collection electrodes (203), so as to block the gap between the guide plate (401) and the second dust collection electrode (203), and elastic members (403) are arranged between the protective plates (402) and the second dust collection electrodes (203).

5. A wide and narrow pitch wet-type electric dust collection system according to claim 4, characterized in that: The guide groove (305) is composed of a first arc-shaped groove (3051), a vertical groove (3052) and a second arc-shaped groove (3053) from top to bottom, and the directions of the two second arc-shaped grooves (3053) on the same frame (301) and close to the adjusting plate (303) are different.

6. A wide and narrow pitch wet-type electric dust collection system according to claim 5, characterized in that: When the inserting rod (306) is located in the vertical groove (3052), the two adjusting plates (303) are in a parallel state with the first dust collecting electrode (201), when the inserting 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 gas flow, when the inserting rod (306) slides into the second arc-shaped groove (3053), the two adjusting plates (303) swing relatively to form a cone for dispersing the dust gas flow.

7. A wide and narrow pitch wet-type electric dust collection system according to claim 1, characterized in that: The first dust collecting electrode (201) is provided with a concentration sensor (503) for detecting the concentration of dust, and the concentration sensor (503) is electrically connected with the electric push rod (502) through a control panel.

8. A wide and narrow pitch wet-type electric dust collection system according to claim 1, characterized in that: The dust removal box (1) is provided with a cathode assembly (6), the cathode assembly (6) includes a support frame (601) fixedly connected with the dust removal box (1), and a plurality of cathode wires (602) vertically extending between the multi-stage dust collecting groups (2) are arranged on the support frame (601) for ionizing dust.

9. A wide and narrow pitch wet-type electric dust collection system according to claim 1, characterized in that: The dust removal box (1) is provided with a spraying assembly (7), the spraying assembly (7) includes a plurality of water pipes (701) corresponding to the first dust collecting electrode (201) and the second dust collecting electrode (203), a plurality of nozzles (702) are arranged on one side of the water pipe (701) close to the multi-stage dust collecting group (2), and the nozzles (702) are used for spraying liquid to form a water film on the surface of the first dust collecting electrode (201) and the second dust collecting electrode (203).

10. A wide and narrow pitch wet-type electric dust collection system according to claim 1, characterized in that: The dust removal box (1) is provided with an air inlet cone (101) and an air outlet cone (102) at two ends along the flow direction of the flue gas, and the bottom of the dust removal box (1) is provided with a hopper (103) in communication with the inside of the dust removal box (1) for collecting dust.

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