Double-V-shaped labyrinth dust collection pneumatic vibrating electric dust remover

Abstract

The invention discloses a double-V-shaped labyrinth dust collection pneumatic rapping electric dust remover which comprises an inlet smoke box, a dust removal box body and an outlet smoke box which are sequentially arranged in the smoke treatment direction, each inlet smoke box is internally provided with a plurality of labyrinth dust pre-collection modules, and the bottom of each labyrinth dust pre-collection module is provided with an independent pneumatic rapping device. The labyrinth dust pre-collection module comprises a fixing device and a dust pre-collection plate set, the fixing device comprises connecting angle steel and transverse connecting channel steel, the two transverse connecting channel steel are located on the left side and the right side of the dust pre-collection plate set, a mounting plane is arranged on a dust pre-collection plate, and the connecting angle steel comprises a positioning plate and a fixing plate which are perpendicular to each other. The positioning plate is movably connected with the mounting plane, and the fixing plate is movably connected with the transverse connecting channel steel; a plurality of independent labyrinth dust pre-collection modules are arranged in the inlet smoke box, each labyrinth dust pre-collection module is rapped through an independent pneumatic rapping device, and the influence of reentrainment of dust is greatly reduced.

Description

Technical Field

[0001] This invention relates to the technical field of electrostatic precipitators, and particularly to the technical field of pneumatic vibratory electrostatic precipitators. Background Technology

[0002] Corona clogging is a significant factor contributing to reduced dust removal efficiency in electrostatic precipitators (ESPs). Methods to prevent corona clogging include increasing the supply voltage, using corona electrodes with strong discharge properties, employing pre-dust removal, and timely cleaning of accumulated dust on the corona wires. High-concentration particulate matter, including high-concentration dust and aerosol particles, is a major cause of corona clogging. Domestic and international researchers have conducted studies on ESP efficiency improvement technologies. Regarding flow field simulation for localized high-concentration dust caused by airflow, Sun Zhipeng used CFD software to simulate and optimize the flue gas duct, reducing the uniformity coefficient of the inlet airflow distribution of the ESP to below 0.20, thus optimizing the flow field distribution. Li Kailun et al. and Zhao Haixiao, after optimizing the flue gas flow field, reduced the flue gas resistance from the air preheater to the absorption tower by 570%. Pa and 73.7%, reducing the power consumption of the induced draft fan; Huang Yu controlled the deviation between the flue gas flow rate and particulate mass flow rate in the inlet flue within ±5% through CFE simulation; in terms of changes to the pre-dust removal of electrostatic precipitators, Lü Jun et al. conducted a chemical agglomeration experiment in the dust removal of a sintering machine head at Wuhan Iron and Steel Group, reducing the dust mass concentration at the outlet of the electrostatic precipitator by 36%; Zhou Dongliang et al. studied the migration and capture mechanism of fine particulate matter under the coupling effect of electric field and flow field, and found that drag force has a significant impact on the removal of particles smaller than 1 μm; in terms of secondary dust control, Yao Qun et al. found that the dust removal efficiency of the electrostatic precipitator at the sintering machine head is generally unstable, and adopted the method of adding cyclone dust removal before the bag filter for pre-dust removal; in terms of power control, Wu Bo and Zhao Junlin et al. adopted the method of superimposing pulse power supply on the high-frequency fundamental wave to change the power supply form of the high-voltage equipment, thereby improving the dust driving speed and dust removal efficiency.

[0003] Analysis of the dust removal mechanism shows that the concentration of inlet dust has the greatest impact on the dust removal efficiency of the first-stage electric field, and the degree of difference determines the concentration level. For example, when the dust concentration at the inlet of the electrostatic precipitator significantly exceeds the operating range of the electrostatic precipitator, the efficiency of the first electric field will decrease significantly due to corona sealing. However, the inlet concentration of the second electric field generally does not exceed the operating range of the electrostatic precipitator, and its efficiency is higher than that of the first electric field.

[0004] Corona enclosure involves the movement of electric charges and energy transfer in an electric field. When charges move under the influence of an electric field, they interact with surrounding air molecules. This interaction leads to the ionization of air molecules, forming new charged particles. These charged particles continue to move under the influence of the electric field, further ionizing more air molecules, thus forming a corona region. As the electric field strengthens and time progresses, this corona phenomenon gradually becomes more significant and eventually forms a closed corona region. This phenomenon has a significant impact on the design and performance of high-voltage electrical appliances, corona discharge equipment, and other related devices.

[0005] The ash content of coal directly determines the dust concentration in flue gas. Electrostatic precipitators have a certain range of adaptability to dust concentration. Beyond this range, the corona current decreases sharply with the increase of dust concentration. When the dust concentration reaches a certain limit, or when the dust concentration is not very high but the dust particle size is very fine and the specific surface area is very large, a strong space charge is easily formed, which shields the corona current. In severe cases, the current passing through the electric field space will approach zero. This phenomenon is called corona blocking. To overcome the corona blocking phenomenon, setting up a pre-dust removal device and cooperating with effective rapping cleaning is one of the simplest and most effective technologies.

[0006] Patent application CN201520776043.9 proposes a top vibrator to vibrate and clean the dust collector inside the inlet horn. However, this method suffers from poor force transmission, leading to excessive vibration at the top and dust generation, while insufficient vibration at the bottom results in ineffective dust removal. Patent application CN202510199845.6 uses pneumatic and mechanical hammers to vibrate and clean the anode of the electrostatic precipitator, but it does not address the dust removal of components inside the inlet head. Patent application 202210368983.9 includes a pre-dust removal and flow equalization device inside the inlet, but lacks a vibrator, resulting in dust accumulation that increases system resistance and reduces dust removal efficiency. Patent application CN202311278185.8 proposes a V-shaped perforated plate flow equalization dust collection device and modification method for electrostatic precipitators, but it uses vibrating body vibration for dust removal, leading to severe secondary dust generation. Summary of the Invention

[0007] The purpose of this invention is to solve the problems in the prior art by proposing a double V-shaped labyrinth dust collector pneumatic vibratory electrostatic precipitator, which can solve the above problems.

[0008] To achieve the above objectives, this invention proposes a double V-shaped labyrinth dust collector with pneumatic vibration, comprising an inlet smoke box, a dust collection box, and an outlet smoke box arranged sequentially along the flue gas treatment direction. The dust collection box contains several dust collection electric fields, each with a dust hopper at its bottom. A cathode system and an anode system are arranged within each dust collection electric field. Each inlet smoke box contains several labyrinth pre-dust collection modules, each with an independent pneumatic vibration device at its bottom. Each labyrinth pre-dust collection module includes a fixing device and a pre-dust collection plate assembly. The pre-dust collection plate assembly consists of several... The assembly consists of several corrugated pre-dust collection plates arranged at intervals along the width of the electric field. The top and bottom of each pre-dust collection plate assembly are equipped with fixing devices. A top suspension device is fixed to the top of the inlet smoke box, and the top fixing devices are fixed to the top suspension device. Each fixing device includes connecting angle steel and transverse connecting channel steel. Two transverse connecting channel steels are located on the left and right sides of the pre-dust collection plate assembly. The pre-dust collection plate has an installation plane. The connecting angle steel includes mutually perpendicular positioning plates and fixing plates. The positioning plates are movably connected to the installation plane, and the fixing plates are movably connected to the transverse connecting channel steels.

[0009] Preferably, the transverse connecting channel steel and the fixing plate are hinged by bolts, and the mounting plane and the positioning plate are also hinged by bolts.

[0010] Preferably, the top suspension device includes a suspension plate and a connecting plate. The suspension plate is fixed to the top of the inlet cigarette box, and the connecting plate is fixed to the bottom of the suspension plate. The bottom of the connecting plate is fixed to the horizontal connecting channel steel at the top. The bottom of the inlet cigarette box is provided with a limiting plate, and the limiting plate is provided with a limiting groove. The horizontal connecting channel steel at the bottom is limited and locked in the limiting groove.

[0011] Preferably, the pre-dust collection plate is a W-shaped plate, with V-shaped grooves on both sides, an installation plane at the bottom of the V-shaped grooves, and a triangular groove between the two V-shaped grooves, the apex of which protrudes from the V-shaped grooves.

[0012] Preferably, two V-shaped grooves are symmetrically arranged on both sides of the triangular groove, and the apex of the triangular groove has a plane, and the angle of the triangular groove is greater than the angle of the V-shaped groove.

[0013] Preferably, the pre-dust collection plate is provided with flow equalization holes.

[0014] Preferably, the pneumatic vibrating device includes a pneumatic vibrator, a vibrating rod, and a connecting base. The vibrating rod is arranged between two horizontal connecting channel steels at the bottom, and the pneumatic vibrator is mounted on the vibrating rod through the connecting base.

[0015] Preferably, the pneumatic vibrator is connected to a pneumatic vibrator control cabinet, which is located outside the electrostatic precipitator. The pneumatic vibrator control cabinet has a main pipe connected to an air source. The main pipe is equipped with a filter pressure reducing valve and several branch pipes connected to it. The main pipe and the branch pipes are connected by a T-joint. Each branch pipe is equipped with an independent solenoid valve and each branch pipe is connected to the corresponding pneumatic vibrator through an air inlet pipe.

[0016] Preferably, the imported smoke box includes an inner end cap and an outer end cap, the inner end cap and the outer end cap are connected at one end near the dust collection box body, the labyrinth pre-dust collection module is installed in the inner end cap, the bottom of the inner end cap is provided with an inner bottom plate, the bottom of the outer end cap is provided with an outer bottom plate, and the inclination angle of the inner bottom plate with the vertical plane is smaller than the inclination angle of the outer bottom plate with the vertical plane.

[0017] Preferably, the inclination angle between the inner bottom plate and the vertical plane is - degrees.

[0018] As a preferred option, a ladder is also provided on the inner bottom plate.

[0019] Preferably, the surface of the outer end cap is provided with a plurality of outer reinforcing ribs at intervals, and the surface of the inner end cap is provided with a plurality of inner reinforcing ribs at intervals, wherein the distribution density of the inner reinforcing ribs is greater than that of the outer reinforcing ribs.

[0020] Preferably, an anode rapping maintenance platform is provided below the dust collection box, and a maintenance staircase is provided on the side of the anode rapping maintenance platform near the inlet smoke box. Several dust collection plate maintenance ports are provided on the maintenance staircase, and the dust collection plate maintenance ports are located at the connection between the inlet smoke box and the dust collection box.

[0021] The beneficial effects of this invention are as follows: This invention pre-collects dust in the flue gas by setting a pre-collecting plate inside the inlet flue gas box of an electrostatic precipitator, utilizing inertial dust collection, gravity settling, and micro-cyclones. Simultaneously, the shape and spacing of the plate improve flow field uniformity and reduce flue gas resistance, thereby achieving the purpose of pre-collection. Each inlet flue gas box contains multiple independent labyrinth pre-collection modules, each of which is vibrated by an independent pneumatic rapping device. Each rapping cleans a small portion of the pre-collecting plate, significantly reducing the impact of secondary dust generation. The labyrinth pre-collection modules... The top is hinged and suspended on the top suspension device, and the bottom is limited by the limiting plate, so that when the pneumatic vibrator is working, the pre-dust collection plate can achieve limited vibration and shaking, so as to achieve limited dust removal. The imported smoke box is divided into two layers: an inner end cap and an outer end cap. The bottom of the inner end cap where the labyrinth pre-dust collection module is installed has a larger slope, which can effectively unload the dust vibrated off the pre-dust collection plate and guide the dust into the ash hopper to avoid dust accumulation and blockage, and effectively reduce the transformation cost. The inner end cap is equipped with denser reinforcing ribs, so that it can better support the labyrinth pre-dust collection module.

[0022] The features and advantages of the present invention will be described in detail through embodiments and in conjunction with the accompanying drawings. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the imported cigarette box of the present invention; Figure 3 This is a schematic diagram of the distribution of reinforcing ribs in this invention; Figure 4 This is a schematic diagram of the installation of the maze pre-dust collection module of the present invention; Figure 5 This is a schematic diagram of the maze pre-dust collection module structure of the present invention; Figure 6 This is a schematic diagram of the pre-dust collection plate structure of the present invention; Figure 7 This is a schematic diagram of the installation of the top suspension device of the present invention; Figure 8 This is a schematic diagram of the installation of the limiting plate of the present invention; Figure 9 This is a schematic diagram of the limiting plate structure of the present invention; Figure 10 This is a schematic diagram of the pneumatic rapping device of the present invention; Figure 11 This is a comparison chart of the electrostatic precipitator operating parameters before and after the modification of this invention; Figure 12 This is a comparison chart of the first electric field operating parameters before and after the modification of this invention.

[0024] In the diagram: 1. Inlet smoke box; 2. Dust collector box; 3. Outlet smoke box; 4. Labyrinth pre-dust collection module; 5. Fixing device; 6. Top suspension device; 7. Pneumatic vibrator device; 8. Limiting plate; 21. Dust collection electric field; 22. Ash hopper; 41. Pre-dust collection plate assembly; 42. Pre-dust collection plate; 43. V-groove; 40. Mounting plane; 44. Triangular groove; 51. Connecting angle steel; 52. Transverse connecting channel steel; 511. Positioning plate; 512. Fixing plate; 61. Suspension. 62. Connecting vertical plate; 71. Pneumatic vibrator; 72. Vibration rod; 73. Connecting base; 74. Pneumatic vibrator control cabinet; 75. Main pipe; 76. Filter pressure reducing valve; 77. Branch pipe; 81. Limiting groove; 11. Inner end cap; 12. Outer end cap; 111. Inner bottom plate; 121. Outer bottom plate; 112. Inner reinforcing rib; 122. Outer reinforcing rib; 23. Anode vibrator maintenance platform; 24. Maintenance staircase; 25. Dust collection plate maintenance port. Detailed Implementation

[0025] See Figures 1 to 10 A double V-shaped labyrinth dust collector with pneumatic vibration electrostatic precipitator includes an inlet smoke box 1, a dust collection box 2, and an outlet smoke box 3 arranged sequentially along the flue gas treatment direction. The dust collection box 2 contains several dust collection electric fields 21, each with a dust hopper 22 at its bottom. Each dust collection electric field 21 contains a cathode system and an anode system. Each inlet smoke box 1 contains several labyrinth pre-dust collection modules 4, each with an independent pneumatic vibration device 7 at its bottom. Each labyrinth pre-dust collection module 4 includes a fixing device 5 and a pre-dust collection plate assembly 41, the latter consisting of several wave-shaped plates spaced apart along the width of the electric field. The dust collection plate assembly 41 is composed of a pre-dust collection plate 42. The top and bottom of the pre-dust collection plate assembly 41 are provided with fixing devices 5. The top of the inlet smoke box 1 is fixed with a top suspension device 6. The top fixing device 5 is fixed on the top suspension device 6. The fixing device 5 includes a connecting angle steel 51 and a transverse connecting channel steel 52. The two transverse connecting channel steels 52 are located on the left and right sides of the pre-dust collection plate assembly 41. The pre-dust collection plate 42 is provided with an installation plane 40. The connecting angle steel 51 includes a positioning plate 511 and a fixing plate 512 that are perpendicular to each other. The positioning plate 511 is movably connected to the installation plane 40, and the fixing plate 512 is movably connected to the transverse connecting channel steel 52.

[0026] The transverse connecting channel steel 52 and the fixing plate 512 are hinged together by bolts, and the mounting plane 40 and the positioning plate 511 are also hinged together by bolts.

[0027] The top suspension device 6 includes a suspension plate 61 and a connecting plate 62. The suspension plate 61 is fixed to the top of the inlet cigarette box 1, and the connecting plate 62 is fixed to the bottom of the suspension plate 61. The bottom of the connecting plate 62 is fixed to the horizontal connecting channel steel 52 at the top. The bottom of the inlet cigarette box 1 is provided with a limiting plate 8, and the limiting plate 8 is provided with a limiting groove 81. The horizontal connecting channel steel 52 at the bottom is limited and locked in the limiting groove 81.

[0028] When the pneumatic rapping device at the bottom rapps, it can effectively transfer the rapping force to the pre-dust collection plate. The labyrinth dust collection plate can achieve limited amplitude rapping and shaking to achieve the purpose of limited dust removal.

[0029] The limiting groove can prevent the position of the maze pre-dust collection module from moving significantly.

[0030] The pre-dust collection plate 42 is a W-shaped plate. V-shaped grooves 43 are provided on both sides of the pre-dust collection plate 42. The bottom of the V-shaped grooves 43 is provided with an installation plane 40. A triangular groove 44 is provided between the two V-shaped grooves 43. The apex of the triangular groove 44 protrudes from the V-shaped grooves 43.

[0031] Two V-shaped grooves 43 are symmetrically arranged on both sides of the triangular groove 44. The apex of the triangular groove 44 has a flat surface, and the angle of the triangular groove 44 is greater than the angle of the V-shaped groove 43.

[0032] The pre-dust collection plate 42 has flow equalization holes.

[0033] The pneumatic vibrating device 7 includes a pneumatic vibrator 71, a vibrating rod 72, and a connecting base 73. The vibrating rod 72 is arranged between two horizontal connecting channel steels 52 at the bottom, and the pneumatic vibrator 71 is mounted on the vibrating rod 72 through the connecting base 73.

[0034] The pneumatic vibrator 71 is connected to a pneumatic vibrator control cabinet 74, which is located outside the electrostatic precipitator. The pneumatic vibrator control cabinet 74 has a main pipe 75 inside, which is connected to an air source. A filter pressure reducing valve 76 is installed on the main pipe 75, and several branch pipes 77 are connected to the main pipe 75. The main pipe 75 and the branch pipes 77 are connected by a T-joint. Each branch pipe 77 is equipped with an independent solenoid valve, and each branch pipe 77 is connected to the corresponding pneumatic vibrator 71 through an air inlet pipe.

[0035] The solenoid valve, filter pressure reducing valve, and tee are arranged inside the pneumatic rapping control cabinet, which is located outside the electrostatic precipitator. Due to the high temperature, high dust content, and corrosive gases inside the electrostatic precipitator, the environment is harsh. Placing the pneumatic rapping control cabinet outside the electrostatic precipitator effectively improves the equipment's operating environment, extends its lifespan and operational stability, and allows for online maintenance of the internal components.

[0036] The solenoid valve is a two-position, three-position normally open type, with ferrules at both ends for connection to metal round tubes.

[0037] The portion of the branch pipe 77 located inside the electrostatic precipitator is made of 316 stainless steel, while the portion located outside the electrostatic precipitator is made of 304 stainless steel.

[0038] The imported smoke box 1 includes an inner end cap 11 and an outer end cap 12. The inner end cap 11 and the outer end cap 12 are connected at one end near the dust collection box 2. The labyrinth pre-dust collection module 4 is installed in the inner end cap 11. The bottom of the inner end cap 11 is provided with an inner bottom plate 111. The bottom of the outer end cap 12 is provided with an outer bottom plate 121. The inclination angle of the inner bottom plate 111 with the vertical plane is smaller than the inclination angle of the outer bottom plate 121 with the vertical plane.

[0039] The inclination angle between the inner bottom plate 111 and the vertical plane is 30-35 degrees.

[0040] Because the channel at the connection between the inlet smoke box and the dust collector is enlarged, and a labyrinth pre-dust collection module is installed at this point, the flow rate of the flue gas will decrease sharply, making it easier for dust to accumulate. This invention sets the inlet smoke box into a double-layer structure. The structure of the outer end cap does not need to be changed. Only the structure of the inner end cap needs to be changed, and the tilt angle of the inner bottom plate is increased, so that the falling dust can smoothly enter the ash hopper, preventing dust accumulation, and the modification cost is lower.

[0041] A ladder is also provided on the inner bottom plate 111 to facilitate the maintenance of the pneumatic vibration device at the bottom.

[0042] The surface of the outer end cap 12 is provided with a plurality of outer reinforcing ribs 122 at intervals, and the surface of the inner end cap 11 is provided with a plurality of inner reinforcing ribs 112 at intervals. The distribution density of the inner reinforcing ribs 112 is greater than that of the outer reinforcing ribs 122.

[0043] The inner end cap bears the weight of the pre-dust collection plate and accumulated ash, so it needs to have stronger support. Therefore, its reinforcing ribs are densely arranged to meet the load-bearing capacity.

[0044] Below the dust collector 2, there is an anode rapping maintenance platform 23. The anode rapping maintenance platform 23 is provided with a maintenance staircase 24 on the side near the inlet smoke box 1. The maintenance staircase 24 is provided with several dust collection plate maintenance ports 25. The dust collection plate maintenance ports 25 are located at the connection between the inlet smoke box 1 and the dust collector 2.

[0045] The transverse connecting channel steel 52 is a C-shaped steel.

[0046] The present invention features excellent rapping acceleration transmission, fewer control points, fewer rapping points, and lower cost. The main components are arranged outside the electrostatic precipitator, allowing for online maintenance, which is convenient and provides good operational stability. Compared to mechanical rapping, pneumatic rapping offers a better operating environment, eliminating contact between moving parts and flue gas, dust, and corrosive gases, resulting in no wear or corrosion, longer lifespan, better operational stability, and simpler maintenance. It also maximizes the effective utilization of space along the length of the electrostatic precipitator, improving space utilization. Furthermore, it enables real-time online adjustment of the cleaning rapping force under varying coal types and load conditions, precisely controlling the rapping through methods such as controlling the opening and closing of solenoid valves, the pressure of the air source, and the rapping interval logic.

[0047] In October 2024, the unit load was 660MW. A comparison of the operating parameters of the electrostatic precipitator before and after the modification with the double V-type labyrinth dust collection pneumatic rapping device is shown below. Figure 11 As shown, Figure 11 a represents Unit 3, which was not modified. Figure 11 b refers to Unit 4 after modification according to this invention.

[0048] Both units burn the same type of coal and have identical original electrostatic precipitators and unit designs. After modification with a double V-type labyrinth dust collection pneumatic rapping device, the corona sealing of the first electric field of the electrostatic precipitator is eliminated under the action of pre-dust collection. The average dust concentration at the outlet of the electrostatic precipitator has decreased from 81 mg / m³ before the modification. 3 The dust concentration at the outlet of the electrostatic precipitator after the modification was reduced to 20.2 mg / m³. 3 .

[0049] Comparison of the first electric field operating parameters before and after the modification Figure 12 As shown, the secondary current and secondary voltage of the modified first electric field increased significantly, effectively eliminating the corona blocking phenomenon.

[0050] The above embodiments are illustrative of the present invention and are not intended to limit the present invention. Any simple modifications to the present invention are within the scope of protection of the present invention.

Claims

1. A double V-shaped labyrinth dust collector pneumatic vibrating electrostatic precipitator, characterized in that: The system includes an inlet smoke box (1), a dust collector (2), and an outlet smoke box (3) arranged sequentially along the flue gas treatment direction. The dust collector (2) contains several dust collector electric fields (21), each with a dust hopper (22) at its bottom. The dust collector electric fields (21) contain a cathode system and an anode system. Each inlet smoke box (1) contains several labyrinth pre-dust collection modules (4), each with an independent pneumatic rapping device (7) at its bottom. Each labyrinth pre-dust collection module (4) includes a fixing device (5) and a pre-dust collection plate group (41). The pre-dust collection plate group (41) consists of several corrugated pre-dust collection plates (42) arranged at intervals along the width of the electric field. The top and bottom of the dust collection plate group (41) are provided with fixing devices (5). The top of the inlet smoke box (1) is fixed with a top hanging device (6). The top fixing device (5) is fixed on the top hanging device (6). The fixing device (5) includes a connecting angle steel (51) and a transverse connecting channel steel (52). The two transverse connecting channel steels (52) are located on the left and right sides of the pre-dust collection plate group (41). The pre-dust collection plate (42) is provided with an installation plane (40). The connecting angle steel (51) includes a positioning plate (511) and a fixing plate (512) that are perpendicular to each other. The positioning plate (511) is movably connected to the installation plane (40), and the fixing plate (512) is movably connected to the transverse connecting channel steel (52).

2. The double V-shaped labyrinth dust collector pneumatic vibrating electrostatic precipitator as described in claim 1, characterized in that: The transverse connecting channel steel (52) and the fixing plate (512) are hinged by bolts, and the mounting plane (40) and the positioning plate (511) are also hinged by bolts.

3. The double V-shaped labyrinth dust collector pneumatic vibrating electrostatic precipitator as described in claim 1, characterized in that: The top suspension device (6) includes a suspension plate (61) and a connecting plate (62). The suspension plate (61) is fixed to the top of the inlet cigarette box (1). The bottom of the suspension plate (61) is fixed with the connecting plate (62). The bottom of the connecting plate (62) is fixed with the top transverse connecting channel steel (52). The bottom of the inlet cigarette box (1) is provided with a limiting plate (8). The limiting plate (8) is provided with a limiting groove (81). The bottom transverse connecting channel steel (52) is limited and locked in the limiting groove (81).

4. The double V-shaped labyrinth dust collector pneumatic vibrating electrostatic precipitator as described in claim 1, characterized in that: The pre-dust collection plate (42) is a W-shaped plate. V-shaped grooves (43) are provided on both sides of the pre-dust collection plate (42). The bottom of the V-shaped groove (43) is provided with an installation plane (40). A triangular groove (44) is provided between the two V-shaped grooves (43). The apex of the triangular groove (44) protrudes from the V-shaped groove (43). The two V-shaped grooves (43) are symmetrically arranged on both sides of the triangular groove (44). A plane is provided at the apex of the triangular groove (44). The angle of the triangular groove (44) is greater than the angle of the V-shaped groove (43).

5. The double V-shaped labyrinth dust collector pneumatic vibrating electrostatic precipitator as described in claim 1, characterized in that: The pneumatic vibrating device (7) includes a pneumatic vibrator (71), a vibrating rod (72), and a connecting base (73). The vibrating rod (72) is arranged in the middle of two horizontal connecting channel steels (52) at the bottom. The pneumatic vibrator (71) is mounted on the vibrating rod (72) through the connecting base (73).

6. The double V-shaped labyrinth dust collector pneumatic vibrating electrostatic precipitator as described in claim 5, characterized in that: The pneumatic vibrator (71) is connected to a pneumatic vibrator control cabinet (74), which is located outside the electrostatic precipitator. The pneumatic vibrator control cabinet (74) has a main pipe (75) inside, which is connected to an air source. The main pipe (75) is equipped with a filter pressure reducing valve (76), and several branch pipes (77) are connected to the main pipe (75). The main pipe (75) and the branch pipes (77) are connected by a T-joint. Each branch pipe (77) is equipped with an independent solenoid valve, and each branch pipe (77) is connected to the corresponding pneumatic vibrator (71) through an air inlet pipe.

7. The double V-shaped labyrinth dust collector pneumatic vibrating electrostatic precipitator as described in claim 1, characterized in that: The imported smoke box (1) includes an inner end cap (11) and an outer end cap (12). The inner end cap (11) and the outer end cap (12) are connected to one end of the dust collection box (2). The labyrinth pre-dust collection module (4) is installed in the inner end cap (11). The bottom of the inner end cap (11) is provided with an inner bottom plate (111). The bottom of the outer end cap (12) is provided with an outer bottom plate (121). The inclination angle of the inner bottom plate (111) with the vertical plane is smaller than the inclination angle of the outer bottom plate (121) with the vertical plane.

8. The double V-shaped labyrinth dust collector pneumatic vibrating electrostatic precipitator as described in claim 7, characterized in that: The inclination angle between the inner bottom plate (111) and the vertical plane is 30-35 degrees.

9. The double V-shaped labyrinth dust collector pneumatic vibrating electrostatic precipitator as described in claim 8, characterized in that: The surface of the outer end cap (12) is provided with a number of outer reinforcing ribs (122) at intervals, and the surface of the inner end cap (11) is provided with a number of inner reinforcing ribs (112) at intervals. The distribution density of the inner reinforcing ribs (112) is greater than that of the outer reinforcing ribs (122).

10. The double V-shaped labyrinth dust collector pneumatic vibrating electrostatic precipitator as described in claim 1, characterized in that: Below the dust collector box (2) is an anode rapping maintenance platform (23). The anode rapping maintenance platform (23) is provided with a maintenance staircase (24) on the side near the inlet smoke box (1). The maintenance staircase (24) is provided with several dust collection plate maintenance ports (25). The dust collection plate maintenance ports (25) are located at the connection between the inlet smoke box (1) and the dust collector box (2).

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