A wet electrostatic precipitator

Abstract

The utility model relates to a kind of wet electrostatic precipitators, the utility model is through the abutment cooperation of supporting piece and plumb bob, replace the rigid fixed mode of grid plate in the prior art, allow cathode wire to produce tiny longitudinal displacement under thermal expansion and cold shrink or airflow impact, release stress, effectively reduce the probability of cathode wire fracture, while the adaptive design of receiving surface and plumb bob, when the equipment foundation occurs tiny displacement, automatically adjust the position of plumb bob, ensure that the discharge spacing between cathode wire and anode tube is uniform, avoid uneven discharge and local short circuit problem, improve dust removal and demisting effect.

Description

Technical Field

[0001] This utility model relates to the field of dust removal device technology, specifically to a wet electrostatic precipitator. Background Technology

[0002] In recent years, environmental protection requirements both domestically and internationally have become increasingly stringent, requiring all petrochemical tail gases and furnace flue gas to undergo dust removal and desulfurization before being discharged in compliance with standards. Currently, wet dust removal and desulfurization remains a reliable mainstream process. However, commonly used wet dust removal and desulfurization methods, such as the lime method, limestone method, sodium alkali method, dual alkali method, ammonia method, organic amine method, and magnesium oxide method, result in flue gas with high moisture, dust, and foam content, leading to severe white smoke and trailing phenomena. With continuously increasing environmental protection requirements, to reduce white smoke and trailing phenomena from chimneys, some wet dust removal and desulfurization processes now require the flue gas to be treated first by an electrostatic precipitator or a wet electrostatic precipitator (also known as a wet electrostatic precipitator, which can be wet or dry) before being discharged through the chimney.

[0003] The working principle of a wet electrostatic precipitator (and similar electrostatic precipitators) is as follows: a high-voltage DC generator converts alternating current into high-voltage direct current, which is then sent to the anode tube bundle and cathode system of the precipitator. A strong electric field is formed between each anode tube bundle (or collecting plate) and the cathode system (discharge lines in the tubes, also called cathode lines). Corona discharge through the cathode lines ionizes the air molecules, instantly generating a large number of electrons and positive and negative ions. When the flue gas after wet dust removal and desulfurization passes through the anode tube bundle, the moisture-containing particles are forcibly charged and move directionally under the influence of the electric field force (Coulomb force), forming the medium for capturing the moisture-containing particles. These negatively charged particles, under the influence of the high-voltage electric field force, move directionally to the inner panel of the anode tube bundle, where they release electrons. The moisture-containing particles are then collected and, under the influence of gravity, flow to or are washed into the recovery device below the precipitator, thus achieving the purpose of purification, dust removal, and demisting.

[0004] In existing technologies, to address the issues of uneven discharge and localized short circuits caused by the oscillation of the cathode wire in high-speed airflow, a common approach is to install a grid plate below the anode tube, fixing the plumb bob at the lower end of the cathode wire in the holes of the grid plate, as shown in the utility model patent with authorization announcement number CN20151123.X. While this solution stabilizes the cathode wire to some extent, it still has the following problems in practical applications: the cathode wire will experience slight longitudinal displacement and stress under thermal expansion and contraction or airflow impact; the rigid fixed structure at both ends of the cathode wire is prone to breakage during long-term use; and it has poor adaptability. During equipment operation, thermal expansion or foundation settlement can cause the cathode wire to tilt or bend when the position of the grid plate changes, disrupting the uniformity of the discharge spacing. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings and deficiencies of the existing technology and to provide a wet electrostatic precipitator.

[0006] The technical solution adopted by this utility model is as follows: A wet electrostatic precipitator includes a precipitator cylinder, which includes a dust collection chamber and an air inlet and an air outlet located at both ends of the dust collection chamber. An electrostatic dust removal mechanism is arranged between the air inlet and the air outlet inside the precipitator cylinder. The electrostatic dust removal mechanism includes multiple anode tubes arranged parallel to each other. A cathode wire is arranged on the central axis of the inner cavity of each anode tube. An upper fixing frame is horizontally arranged above the anode tubes inside the dust collection chamber and fixed to the upper end of the cathode wire. The lower end of the cathode wire passes through the anode tube and a plumb bob is fixedly installed at its end.

[0007] The lower end of the anode tube is fixed with a receiving component, which has a receiving surface adapted to the outer circumference of the plumb bob. The plumb bob abuts against the receiving surface, and the receiving surface forms an upward supporting force on the plumb bob.

[0008] Preferably, the receiving component includes a connecting cylinder portion connected to the anode tube and a connecting plate portion connected to the lower port of the connecting cylinder portion. The connecting plate portion has a vertically penetrating through hole corresponding to the plumb bob, and the receiving surface is formed on the inner circumferential surface of the through hole.

[0009] Preferably, the outer periphery of the plumb bob has a first conical surface with a diameter that decreases from top to bottom, and the receiving surface is a conical surface that matches the shape of the first conical surface. The lower end of the plumb bob passes through a through hole and the first conical surface abuts against the receiving surface. The receiving surface forms an upward supporting force on the first conical surface.

[0010] Preferably, the inner circumferential surface of the through hole is composed of a connecting bearing surface and a cylindrical surface from top to bottom, and the diameter of the cylindrical surface remains constant from top to bottom and is equal to the diameter of the lower end of the bearing surface.

[0011] Preferably, the connecting cylinder is threaded to the lower end of the inner cavity of the anode tube.

[0012] Preferably, a positioning ring is provided at the lower end of the inner cavity of the anode tube, and the upper end of the connecting cylinder abuts against the lower end of the positioning ring.

[0013] Preferably, at least the surface of the receiving member is covered with a flexible layer.

[0014] Preferably, the flexible layer is a multi-layer composite structure, including a flexible corrosion-resistant layer located in the inner layer and a flexible conductive shielding layer located in the outer layer.

[0015] The beneficial effects of this utility model are as follows: By using the contacting fit between the receiving part and the plumb bob, the rigid fixing method of the grid plate in the prior art is replaced, allowing the cathode wire to undergo slight longitudinal displacement under thermal expansion and contraction or airflow impact, releasing stress and effectively reducing the probability of cathode wire breakage. At the same time, the matching design of the receiving surface and the plumb bob can automatically adjust the position of the plumb bob when the equipment foundation undergoes slight displacement, ensuring that the discharge gap between the cathode wire and the anode tube is uniform, avoiding uneven discharge and local short circuit problems, and improving the dust removal and demisting effect. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, obtaining other drawings based on these drawings without creative effort still falls within the scope of this utility model.

[0017] Figure 1 This is a partial sectional front view of the overall structure of an embodiment of this utility model;

[0018] Figure 2 for Figure 1 Enlarged view of the structure at point A in the middle;

[0019] Figure 3 for Figure 2 Enlarged view of the structure at point B in the middle;

[0020] In the figure, 1-dust collector cylinder, 11-dust collection chamber, 12-air inlet, 13-air outlet, 14-upper fixed frame, 2-anode tube, 21-positioning ring, 3-cathode wire, 31-plumb, 311-first conical surface, 4-receiving component, 41-connecting cylinder, 42-connecting plate, 421-through hole, 4211-receiving surface, 4212-cylindrical surface, 51-flexible corrosion-resistant layer, 52-flexible conductive shielding layer. Detailed Implementation

[0021] To make the objectives, technical solutions and advantages of this utility model clearer, the utility model will be described in further detail below with reference to the accompanying drawings.

[0022] It should be noted that all uses of "first" and "second" in the embodiments of this utility model are for the purpose of distinguishing two entities or parameters with the same name but different names. It is clear that "first" and "second" are only for the convenience of expression and should not be construed as limiting the embodiments of this utility model. Subsequent embodiments will not explain this in detail.

[0023] The directional and positional terms used in this utility model, such as "up," "down," "front," "back," "left," "right," "inner," "outer," "top," "bottom," and "side," are merely for reference to the accompanying drawings. Therefore, the directional and positional terms used are for the purpose of explaining and understanding this utility model, and not for limiting the scope of protection of this utility model.

[0024] In existing technologies, to address the issues of uneven discharge and localized short circuits caused by the oscillation of the cathode wire in high-speed airflow, a common approach is to install a grid plate below the anode tube, fixing the plumb bob at the lower end of the cathode wire in the holes of the grid plate, as shown in the utility model patent with authorization announcement number CN20151123.X. While this solution stabilizes the cathode wire to some extent, it still has the following problems in practical applications: the cathode wire will experience slight longitudinal displacement and stress under thermal expansion and contraction or airflow impact; the rigid fixed structure at both ends of the cathode wire is prone to breakage during long-term use; and it has poor adaptability. During equipment operation, thermal expansion or foundation settlement can cause the cathode wire to tilt or bend when the position of the grid plate changes, disrupting the uniformity of the discharge spacing.

[0025] Based on this, and to improve the problems in related technologies, embodiments of this application provide a wet electrostatic precipitator, such as... Figures 1-3 As shown: It includes a dust collector cylinder 1, which includes a dust collection chamber 11 and an air inlet 12 and an air outlet 13 located at both ends of the dust collection chamber 11. An electrostatic dust removal mechanism is arranged between the air inlet 12 and the air outlet 13 inside the dust collector cylinder 1. The electrostatic dust removal mechanism includes multiple anode tubes 2 arranged in parallel. A cathode wire 3 is arranged on the central axis of the inner cavity of each anode tube 2. An upper fixing frame 14 is horizontally arranged above the anode tubes 2 inside the dust collection chamber 11 and fixed to the upper end of the cathode wire 3. The lower end of the cathode wire 3 passes through the anode tubes 2 and a plumb bob 31 is fixedly installed at its end.

[0026] The dust collector cylinder 1 serves as the overall installation foundation, and the dust removal chamber 11 inside it is the core space for flue gas purification. The air inlet 12 is used to introduce the humid and dusty flue gas after wet dust removal and desulfurization, and the air outlet 13 is used to discharge the purified clean flue gas. The two are symmetrically arranged at both ends of the dust removal chamber 11 to ensure that the flue gas can pass smoothly through the entire dust removal chamber 11. The electrostatic precipitator is a key component for further purification of flue gas. Multiple anode tubes 2 are arranged in parallel to each other to form a dense collection array. Each anode tube 2 is hollow, and its inner cavity is a channel for flue gas flow and particle collection. The cathode wire 3 is set on the central axis of the inner cavity of the anode tube 2 to ensure that the discharge distance between the cathode wire 3 and the inner wall of the anode tube 2 is uniform. The upper fixing frame 14 is horizontally fixed above the anode tube 2 in the dust removal chamber 11 to fix the upper end of the cathode wire 3 and provide upper support for the cathode wire 3. The lower end of the cathode wire 3 passes through the anode tube 2 and is fixedly connected to the lead weight 31. The lead weight 31 uses its own gravity to generate a downward pulling force on the cathode wire 3, keeping the cathode wire 3 taut and preventing the cathode wire 3 from swinging violently under the impact of high-speed flue gas. A receiving component 4 is fixed to the lower end of the anode tube 2. The receiving component 4 is made of non-metallic materials (such as high-temperature resistant and corrosion-resistant PPS or PTFE). The receiving component 4 has a receiving surface 4211 that is adapted to the outer circumference of the plumb bob 31. The plumb bob 31 abuts against the receiving surface 4211, and the receiving surface 4211 provides an upward supporting force to the plumb bob 31. The receiving component 4 is fixed to the lower end of the anode tube 2. Its core function is to provide an upward supporting force to the plumb bob 31 through the abutting cooperation between the receiving surface 4211 and the plumb bob 31 (this supporting force can be vertically upward or have an upward component force). This balances the weight of the plumb bob 31 itself and the tension of the cathode wire 3. This can limit the excessive swing of the cathode wire 3 and provide a certain longitudinal movement space for the cathode wire 3, avoiding the breakage problem caused by the rigid fixation of both ends of the cathode wire 3. When flue gas passes through anode tube 2, the DC high-voltage generator converts alternating current into high-voltage direct current and delivers it to anode tube 2 and cathode wire 3, creating a strong electric field between them. Cathode wire 3 undergoes corona discharge, ionizing the air to generate a large number of electrons and positive and negative ions. Moist particles in the flue gas are forcibly charged and move towards the inner wall of anode tube 2 under the action of Coulomb force, where they are accumulated. Finally, under the action of gravity or flushing water, they flow into the recovery device below, achieving flue gas purification. This technical solution replaces the rigid fixing method of the grid plate in the prior art by using the abutting cooperation between the receiving part 4 and the plumb bob 31. This allows the cathode wire 3 to undergo slight longitudinal displacement under thermal expansion and contraction or airflow impact, releasing stress and effectively reducing the probability of cathode wire 3 breakage. At the same time, the adaptive design of the receiving surface 4211 and the plumb bob 31 can automatically adjust the position of the plumb bob 31 when the equipment foundation undergoes slight displacement, ensuring a uniform discharge distance between the cathode wire 3 and anode tube 2, avoiding uneven discharge and local short circuit problems, and improving the dust removal and demisting effect.

[0027] Optionally, in some embodiments, the receiving component 4 includes a connecting cylinder portion 41 connected to the anode tube 2 and a connecting plate portion 42 connected to the lower port of the connecting cylinder portion 41. The connecting plate portion 42 has a vertically penetrating through hole 421 corresponding to the plumb bob 31, and the receiving surface 4211 is formed on the inner circumferential surface of the through hole 421. The connecting cylinder portion 41 is the core structure for connecting the receiving component 4 to the anode tube 2. Its shape is adapted to the lower end structure of the anode tube 2, and it can be tightly connected to the lower end of the anode tube 2 to ensure the stability of the installation of the receiving component 4. The connecting plate portion 42 is integrally connected to the lower port of the connecting cylinder portion 41 and is arranged horizontally. It is used to support the plumb bob 31 and form the receiving surface 4211. The through hole 421 vertically penetrates the connecting plate portion 42, and its position corresponds to the central axis of the anode tube 2 to ensure that the plumb bob 31 can smoothly pass through the through hole 421 and abut against the receiving surface 4211 on the inner circumferential surface of the through hole 421. The receiving surface 4211 is formed on the inner circumferential surface of the through hole 421, so that the receiving surface 4211 can limit and support the plumb bob 31 from the outer circumference, the force is more uniform, and the stability of the plumb bob 31 is further improved, preventing the plumb bob 31 from shifting and causing the cathode wire 3 to tilt.

[0028] Optionally, in some embodiments, the outer periphery of the plumb bob 31 has a first conical surface 311 whose diameter decreases from top to bottom. The receiving surface 4211 is a conical surface adapted to the shape of the first conical surface 311. The lower end of the plumb bob 31 passes through the through hole 421, and the first conical surface 311 abuts against the receiving surface 4211. The receiving surface 4211 provides an upward supporting force to the first conical surface 311. The first conical surface 311 on the outer periphery of the plumb bob 31 gradually decreases in diameter from top to bottom, forming a conical structure at the bottom of the plumb bob 31. This facilitates the plumb bob 31 passing smoothly through the through hole 421. At the same time, the conical structure increases the contact area with the receiving surface 4211, making the supporting force of the receiving surface 4211 on the plumb bob 31 more uniform and avoiding excessive local stress that could damage the plumb bob 31 or the receiving surface 4211. The receiving surface 4211 is designed to fit the first conical surface 311, ensuring a tight fit between the two. When the plumb bob 31 is impacted by airflow or slight equipment displacement, the conical surface can automatically fine-tune the position of the plumb bob 31, ensuring that the plumb bob 31 is always in the center position. This ensures a uniform discharge gap between the cathode wire 3 and the anode tube 2, avoiding uneven discharge. The beneficial effect of this embodiment is that the conical surface fit structure design not only improves the stability of the plumb bob 31 and reduces its swing amplitude, but also enables the plumb bob 31 to automatically center, adapt to slight displacement during equipment operation, and improve the adaptability and stability of the equipment. At the same time, the conical structure facilitates the fitting and separation of the plumb bob 31 and the receiving surface 4211, facilitating the installation, inspection, and maintenance of the equipment. A specific operable implementation scheme is as follows: the cone angle of the first conical surface 311 is set to 30°-60°, the surface of the conical surface is polished to reduce the coefficient of friction, and the cone angle of the receiving surface 4211 is consistent with the cone angle of the first conical surface 311.

[0029] Optionally, in some embodiments, the inner circumferential surface of the through hole 421 is composed of a receiving surface 4211 and a cylindrical surface 4212 connected from top to bottom. The diameter of the cylindrical surface 4212 remains constant from top to bottom and is equal to the diameter of the lower end of the receiving surface 4211. The receiving surface 4211 is located at the upper part of the inner circumferential surface of the through hole 421, and the cylindrical surface 4212 is located at the lower part. The two are seamlessly connected, and the diameter of the cylindrical surface 4212 is consistent with the diameter of the lower end of the receiving surface 4211, so that the inner circumferential surface of the through hole 421 forms a smooth transition structure, avoiding steps or sharp corners, and preventing the plumb bob 31 from getting stuck when passing through the through hole 421 or undergoing longitudinal displacement. The beneficial effects of this embodiment are that the combined structure of the bearing surface 4211 and the cylindrical surface 4212 can provide stable support for the plumb bob 31 through the bearing surface 4211, and guide and limit the plumb bob 31 through the cylindrical surface 4212, further improving the stability of the plumb bob 31 and preventing the plumb bob 31 from shifting and causing the cathode line 3 to tilt. At the same time, the smooth transition structure design can reduce the friction and wear between the plumb bob 31 and the through hole 421, extend the service life of the equipment, and facilitate the smooth flow of flushing water through the through hole 421, avoiding corrosion problems caused by water accumulation in the through hole 421.

[0030] Optionally, in some embodiments, the connecting cylinder 41 is threadedly connected to the lower end of the inner cavity of the anode tube 2. The outer circumferential surface of the connecting cylinder 41 is provided with an external thread, and the inner circumferential surface of the lower end of the inner cavity of the anode tube 2 is provided with an internal thread adapted to the external thread. The connecting cylinder 41 and the anode tube 2 are fixed through a threaded connection. Threaded connections have the advantages of simple structure, reliable connection, and convenient disassembly, facilitating the installation, maintenance, and replacement of the receiving component 4. Simultaneously, the installation height of the receiving component 4 can be finely adjusted by adjusting the thread insertion depth, thereby adjusting the mating clearance between the plumb bob 31 and the receiving surface 4211 to adapt to different operating conditions. The beneficial effects of this embodiment are that the threaded connection ensures a tight connection between the connecting cylinder 41 and the anode tube 2, preventing flue gas leakage from the connection point and affecting the dust removal effect. It also facilitates adjusting the height of the receiving component 4 according to actual usage, improving the flexibility and adaptability of the equipment. The convenient disassembly also reduces equipment maintenance costs. When the receiving component 4 is worn or damaged, it can be quickly disassembled and replaced without affecting the normal operation of the equipment. The specific feasible implementation scheme is as follows: the external thread on the outer circumference of the connecting cylinder 41 is a fine thread. Fine threads have the advantages of a small thread helix angle and good self-locking performance, which can effectively prevent the connecting cylinder 41 from loosening due to vibration during equipment operation. The internal thread at the lower end of the inner cavity of the anode tube 2 is precisely matched with the external thread. The thread surface is coated with corrosion-resistant sealant, which can not only enhance the sealing performance and prevent flue gas leakage, but also play a role in rust prevention and extend the service life of the thread. A wrench slot is provided at the lower end of the connecting cylinder 41 to facilitate tightening or disassembling the connecting cylinder 41 with a wrench. As an alternative embodiment, those skilled in the art can also use a coarse thread connection to improve disassembly efficiency. At the same time, a lock nut is provided between the connecting cylinder 41 and the anode tube 2 to further enhance the stability of the connection and prevent loosening.

[0031] Optionally, in some embodiments, a positioning ring 21 is provided near the lower end of the inner cavity of the anode tube 2, and the upper end of the connecting cylinder 41 abuts against the lower end of the positioning ring 21. The positioning ring 21 is an annular protrusion integrally formed at the lower end of the inner cavity of the anode tube 2, and its axis coincides with the axis of the anode tube 2. It is used to limit the installation position of the connecting cylinder 41. When the connecting cylinder 41 is screwed into the lower end of the inner cavity of the anode tube 2 by threads, the upper end of the connecting cylinder 41 abuts against the lower end of the positioning ring 21. At this time, the connecting cylinder 41 reaches the preset installation position, avoiding the connecting cylinder 41 from being screwed in too deeply or too shallowly, ensuring that the installation height of the receiving part 4 is consistent, thereby ensuring that the tension of all cathode wires 3 is consistent, and avoiding the tilting of the cathode wires 3 or uneven discharge spacing caused by the installation height deviation of the receiving part 4. The beneficial effects of this embodiment are that the positioning ring 21 enables the rapid positioning and installation of the connecting cylinder 41, improving installation efficiency. At the same time, it ensures that the installation height of all the receiving parts 4 is uniform, ensuring the stability and consistency of equipment operation, and avoiding problems such as the swaying of the cathode wire 3 and uneven discharge caused by the installation position deviation of the connecting cylinder 41. In addition, the positioning ring 21 can also enhance the structural strength of the lower end of the inner cavity of the anode tube 2, reducing the probability of the anode tube 2 deforming due to force.

[0032] Optionally, in some embodiments, at least a portion of the surface of the receiving member 4, including the receiving surface 4211, is covered with a flexible layer. The flexible layer is made of a material with a certain degree of elasticity and toughness, covering the surface of the receiving surface 4211. In some embodiments, it may also cover the entire surface of the receiving member 4. The flexible layer can buffer the impact force between the plumb bob 31 and the receiving surface 4211, reducing friction and wear between them. Simultaneously, it can accommodate minor displacements of the plumb bob 31, further improving the stability of the plumb bob 31 and preventing damage to the plumb bob 31 or the receiving surface 4211 due to rigid contact. The beneficial effects of this embodiment are that the flexible layer can effectively extend the service life of the receiving member 4 and the plumb bob 31, reducing equipment maintenance costs. Simultaneously, the buffering effect can reduce vibration and noise during equipment operation, improving the stability of equipment operation. The elasticity of the flexible layer can also accommodate minor offsets of the plumb bob 31, further ensuring the center position of the cathode wire 3, ensuring uniform discharge spacing, and improving dust removal and demisting effects. Furthermore, the flexible layer can prevent damage to the receiving surface 4211 due to corrosion, improving the corrosion resistance of the receiving member 4.

[0033] Optionally, in some embodiments, the flexible layer is a multi-layer composite structure, including an inner flexible corrosion-resistant layer 51 and an outer flexible conductive shielding layer 52. The flexible conductive shielding layer 52 is connected to the anode tube flange via a wire to ensure that the outer layer potential is the same as that of the anode tube (grounded), eliminating the potential difference between it and the cathode wire, preventing electric field interference and its own breakdown. The flexible corrosion-resistant layer 51 is located in the inner layer of the flexible layer and is in direct contact with the receiving surface 4211. Its main function is to resist the erosion of corrosive media such as flushing water and acidic substances in flue gas in the wet electrostatic precipitator, protect the receiving surface 4211 and the receiving component 4, and extend their service life. The flexible conductive shielding layer 52 is located in the outer layer of the flexible layer and is in direct contact with the plumb bob 31. Its main function is to eliminate the static electricity accumulation between the plumb bob 31 and the receiving surface 4211, avoid the interference of electrostatic discharge on the discharge effect of the cathode wire 3, and ensure the stability of the electric field, improving the dust removal and demisting efficiency. In addition, the flexible conductive shielding layer 52 can also enhance the wear resistance of the flexible layer and further extend the service life of the flexible layer. The beneficial effects of this implementation are that the flexible layer of the multi-layer composite structure takes into account corrosion resistance, conductivity, and wear resistance. It can protect the receiving part 4 and the plumb bob 31 from corrosion and wear, and also eliminate electrostatic interference, ensuring the normal operation of the equipment and improving the dust removal effect. Compared with a flexible layer of a single material, the flexible layer of the composite structure has more comprehensive performance, a longer service life, and can adapt to the complex working environment inside the wet electrostatic precipitator, reducing the maintenance frequency and cost of the equipment. The specific operable implementation scheme is as follows: the flexible corrosion-resistant layer 51 is made of fluororubber material with a thickness of 0.5-1.5mm, which has excellent corrosion resistance and elasticity; the flexible conductive shielding layer 52 is made of conductive rubber material with a thickness of 0.5-1.5mm. Carbon fiber conductive filler is added to the conductive rubber to ensure its conductivity. The flexible corrosion-resistant layer 51 and the flexible conductive shielding layer 52 are integrally formed by vulcanization process to ensure that the two are tightly bonded and do not separate. At the same time, the surface of the flexible conductive shielding layer 52 can be provided with fine anti-slip texture to enhance the friction between it and the plumb bob 31, further improving the stability of the plumb bob 31. As an alternative embodiment, those skilled in the art may also use polytetrafluoroethylene material for the flexible corrosion-resistant layer 51 and a composite structure of metal mesh and flexible material for the flexible conductive shielding layer 52, which can both ensure conductivity and improve wear resistance.

[0034] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the claims of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A wet electrostatic precipitator, comprising a precipitator cylinder (1), the precipitator cylinder (1) comprising a dust collection chamber (11), and an air inlet (12) and an air outlet (13) disposed at both ends of the dust collection chamber (11), an electrostatic dust removal mechanism disposed between the air inlet (12) and the air outlet (13) inside the precipitator cylinder (1), the electrostatic dust removal mechanism comprising a plurality of parallel anode tubes (2), a cathode wire (3) disposed on the central axis of the inner cavity of each anode tube (2), an upper fixing frame (14) fixed to the upper end of the cathode wire (3) being horizontally disposed above the anode tubes (2) inside the dust collection chamber (11), the lower end of the cathode wire (3) passing through the anode tubes (2) and a plumb bob (31) fixedly disposed at its end, characterized in that: The lower end of the anode tube (2) is fixed with a receiving member (4), which has a receiving surface (4211) adapted to the outer circumferential shape of the plumb bob (31). The plumb bob (31) abuts against the receiving surface (4211) and the receiving surface (4211) forms an upward supporting force on the plumb bob (31).

2. The wet electrostatic precipitator according to claim 1, characterized in that: The receiving component (4) includes a connecting cylinder (41) connected to the anode tube (2) and a connecting plate (42) connected to the lower port of the connecting cylinder (41). The connecting plate (42) is provided with a vertical through hole (421) corresponding to the plumb bob (31). The receiving surface (4211) is formed on the inner circumferential surface of the through hole (421).

3. A wet electrostatic precipitator according to claim 2, characterized in that: The outer periphery of the plumb bob (31) has a first conical surface (311) whose diameter decreases from top to bottom. The receiving surface (4211) is a conical surface that matches the shape of the first conical surface (311). The lower end of the plumb bob (31) passes through the through hole (421) and the first conical surface (311) abuts against the receiving surface (4211). The receiving surface (4211) forms an upward supporting force on the first conical surface (311).

4. A wet electrostatic precipitator according to claim 3, characterized in that: The inner circumferential surface of the through hole (421) is composed of a connecting bearing surface (4211) and a cylindrical surface (4212) from top to bottom. The diameter of the cylindrical surface (4212) remains constant from top to bottom and its diameter is equal to the diameter of the lower end of the bearing surface (4211).

5. A wet electrostatic precipitator according to claim 2, characterized in that: The connecting cylinder (41) is threaded to the lower end of the inner cavity of the anode tube (2).

6. A wet electrostatic precipitator according to claim 5, characterized in that: The anode tube (2) has a positioning ring (21) located near the lower end of its inner cavity, and the upper end of the connecting cylinder (41) abuts against the lower end of the positioning ring (21).

7. A wet electrostatic precipitator according to any one of claims 2-6, characterized in that: The surface of at least the receiving surface (4211) of the receiving component (4) is covered with a flexible layer.

8. A wet electrostatic precipitator according to claim 7, characterized in that: The flexible layer is a multi-layer composite structure, including a flexible corrosion-resistant layer (51) located in the inner layer and a flexible conductive shielding layer (52) located in the outer layer.

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