CN219502958U

CN219502958U - Vertical wet electrostatic precipitator

Info

Publication number: CN219502958U
Application number: CN202320391054.XU
Authority: CN
Inventors: 束云峰; 陈方; 李�杰; 戴启明; 丁佐亮; 罗伟
Original assignee: Jiangsu Xinhuaneng Environmental Engineering Co ltd
Current assignee: Jiangsu Xinhuaneng Environmental Engineering Co ltd
Priority date: 2023-03-06
Filing date: 2023-03-06
Publication date: 2023-08-11
Anticipated expiration: 2033-03-06

Abstract

The utility model discloses a vertical wet electrostatic precipitator, which comprises a plurality of dust collecting electrodes and cathode wires, wherein the dust collecting electrodes are sieve hole pipes with a plurality of through holes distributed on the pipe wall, the cathode wires are arranged in the dust collecting electrodes, a sealing plate is arranged at the top of each sieve hole pipe and is connected with each sieve hole pipe, the sealing plate shields gap areas among the sieve hole pipes, and nozzles for spraying water to the outer walls of the sieve hole pipes are arranged in the gap areas. The utility model can wash without power failure, separate dust collecting space from air flow space, solve the problem of secondary dust raising on the dust collecting electrode and improve the dust removing efficiency.

Description

Vertical wet electrostatic precipitator

Technical Field

The utility model relates to an electric dust collector, in particular to a vertical wet electrostatic dust collector.

Background

The internal airflow of the vertical electrostatic precipitator is usually from bottom to top, and dust needs to fall into the dust hopper downwards to realize final separation, so that the airflow direction is unfavorable for capturing and separating the dust, and even the dust driven to the dust collecting electrode can be lifted again.

The wet electrostatic dust collection is adopted, water is sprayed to the dust collecting electrode (anode) to form a water film, so that the problem of secondary dust emission can be reduced, and the dust collection can be promoted by relying on the water film. However, the tubular anode tube is long, and cannot be flushed inside, and only end flushing can be used. In addition, the vulva line is also arranged in the anode tube, the electric field needs to be cut off when the end part is washed, and the dust remover loses the electrostatic dust removing capability at that time, so that the efficiency of the dust remover is greatly reduced when the end part is washed; the intermittent flushing usually needs several hours (4-24 hours) at each interval, and during the period of stopping flushing, the flue gas gradually takes away the water film on the dust collecting electrode along with the continuous flow of the flue gas, so that the dust collecting electrode is usually dried before the next flushing and cannot rely on the water film for ash removal, and the efficiency of the dust remover can be further influenced.

Disclosure of Invention

Aiming at the defects in the prior art, the utility model aims to provide a vertical wet electrostatic precipitator, which solves the problem of secondary dust emission on a dust collecting electrode, ensures a continuous water film on the dust collecting electrode and improves the dust removing efficiency.

The technical scheme of the utility model is as follows: the utility model provides a vertical wet electrostatic precipitator, includes a plurality of dust collecting electrode and negative pole line, the dust collecting electrode is the screen hole pipe that the pipe wall cloth has a plurality of through-holes, the negative pole line set up in the dust collecting electrode, the top of screen hole pipe is equipped with the shrouding, each is connected to the shrouding screen hole pipe, the shrouding shields each clearance area between the screen hole pipe, set up in the clearance area to the nozzle of outer wall water spray of screen hole pipe.

The integrated electrode is arranged as the sieve pore tube, and a part of charged dust is in the same way as the prior art, loses electricity on the inner wall of the sieve pore tube, and is adsorbed on the inner wall of the sieve pore tube or directly falls down; the other part of charged dust passes through the through holes on the walls of the screen hole pipes and then enters the gap area between the screen hole pipes to lose electricity, and is adsorbed on the outer walls of the screen hole pipes or directly falls down, and the nozzle sprays water on the outer walls of the screen hole pipes to form a water film so as to further adsorb the dust and continuously remove the dust.

Further, the cross section of the screen hole pipe is circular, and the cathode lines are arranged along the axis of the screen hole pipe. Compared with the hexagonal prism dust collecting electrode, the cathode wire has the same pipe wall interval with the circular sieve pore pipe, the electric field intensity of each part in the sieve pore pipe is the same, the uniform electric field can improve the average running voltage, the dust charge efficiency and the driving speed, and the dust removing efficiency is further improved.

Further, a plurality of nozzles are arranged at intervals along the axial direction of the screen hole pipe. The water film covering of the outer wall of the long-distance sieve pore tube can be effectively ensured by arranging the plurality of nozzles at intervals so as to fully adsorb dust.

Further, the sealing plate is a conductive plate, and the sealing plate is electrically connected with each screen hole pipe, and the screen hole pipes forming the gap area are mutually connected and electrically connected in the circumferential direction of the gap area. The sieve pore tube in the gap area forms a Faraday cage, the electric field is shielded outside the gap area, and dust separated into the gap area is not influenced by the electric field force, so that the separation effect is ensured.

Further, the cross section of the screen hole pipe is circular, and the outer walls of the adjacent screen hole pipes are closely attached to each other. The closely attached round screen hole pipes can be arranged as much as possible in the space of the dust collector, and a gap area is constructed by utilizing the gaps among the round pipes, compared with a hexagonal prism dust collecting electrode, the treatment flow of dust-containing air flow is reduced slightly, and meanwhile, the area capable of continuously spraying water is obtained.

Further, the screen hole pipes are arranged in a plurality of rows, the screen hole pipes in adjacent rows are arranged in a staggered mode, and the circumference of the clearance area is the pipe wall of three adjacent screen hole pipes.

Compared with the prior art, the utility model has the advantages that:

because the sealing plate at the top of the screen hole pipe shields the gap area between the screen hole pipes, the air flow entering the electrostatic precipitator mainly passes through the inside of the screen hole pipes, the air flow in the gap area is less, and the dust collection space is separated from the air flow space, so that dust in the gap area can quickly and naturally fall down and is less influenced by the air flow; because the adsorption effect of the water film on the outer wall of the sieve pore tube and the separation of the nozzle and the cathode line can continuously spray water, the possibility that the adsorbed dust is carried by the air flow can be further reduced; the water spray to the outer wall of the screen hole pipe also can penetrate through the through hole of the pipe wall to enter the inner wall of the screen hole pipe, a water film is formed on the inner wall of the screen hole pipe, the water film formed by water spray at intervals at the end part of the anode pipe is supplemented to a certain extent, the dust absorption capacity of the inner wall of the screen hole pipe is improved, and the dust collection efficiency can be generally improved.

Drawings

Fig. 1 is a schematic structural view of a vertical wet electrostatic precipitator of example 1.

Fig. 2 is a schematic view of the dust collecting electrode structure of embodiment 1.

Fig. 3 is a schematic plan view of the arrangement structure of the dust collecting electrode of embodiment 1.

Fig. 4 is a schematic plan view of the nozzle arrangement of example 1.

Fig. 5 is a perspective view showing the arrangement structure of the dust collecting electrode of embodiment 1.

Fig. 6 is a schematic diagram of the electrode layer for dust separation and collection.

Fig. 7 is a schematic view of the arrangement structure of the dust collecting electrode of example 2.

Fig. 8 is a schematic diagram of the arrangement structure of the dust collecting electrode of example 3.

Detailed Description

The present utility model is further described below with reference to examples, which are to be construed as merely illustrative of the present utility model and not limiting of its scope, and various modifications to the equivalent arrangements of the present utility model will become apparent to those skilled in the art upon reading the present description, which are within the scope of the utility model as defined in the appended claims.

In embodiment 1, please refer to fig. 1 to 5, a vertical wet electrostatic precipitator according to this embodiment includes a precipitator body 1, an airflow outlet 2 is formed at the top of the precipitator body 1, a water collecting dust hopper 3 is formed at the bottom of the precipitator body 1, and a lateral airflow inlet 4 is formed above the bottom of the precipitator body 1. A spraying layer and an electrode layer are arranged in the dust remover body 1 at a position between the airflow outlet 2 and the airflow inlet 4, and the spraying layer is positioned above the electrode layer. The electrode layer mainly comprises a dust collecting electrode and a cathode wire 5, the cathode wire 5 is connected with a high-voltage direct current power supply 6, and the dust collecting electrode and the outer shell of the dust remover body 1 are grounded. The spraying layer is composed of a plurality of spraying heads 7 and corresponding water supply pipelines, and the spraying layer is used for implementing interval spraying on the electrode layer.

In this embodiment, the dust collecting electrode is a sieve tube 8 with a plurality of through holes 8a distributed on the wall thereof, and the diameter of the through holes may be 2-20mm, and it should be noted that the through holes 8a may not be circular holes in the present utility model. A certain gap is left between the plurality of screen hole pipes 8, so that an air flow region a enclosed by the pipe walls of the individual screen hole pipes 8 and a gap region B formed between the plurality of screen hole pipes 8 are formed in the whole electrode layer. A cathode line 5 is provided in the air flow area a, i.e. in the individual screen hole pipes 8. In general, the cathode wires 5 are arranged on the axis of the sieve pore tube 8, so that the electric fields in the sieve pore tube 8 are symmetrically distributed, and the dust removal effect is ensured.

A transversely extending sealing plate 9 is connected to the top of the screen hole pipes 8, and the sealing plate 9 is used for shielding the gap area B between the screen hole pipes 8, that is, the sealing plate 9 is provided with holes corresponding to the screen hole pipes 8, and the top of the screen hole pipe 8 is inserted into the holes or the pipe orifice of the screen hole pipe 8 is directly fixed with the hole edges. Thus, due to the presence of the sealing plate 9, after the dust-containing gas flow enters the electrode layer from below, most of the gas flow passes through the gas flow region a, while the gas flow in the gap region B is small and relatively stable.

The spray header 7 of the spray layer is arranged right above the screen hole pipe 8 and is used for spraying to the screen hole pipe 8 at intervals. In the gap areas B between the screen hole pipes 8, a number of nozzles 10 are also arranged, which nozzles 10 are used for continuous or intermittent spraying to the outer wall of the screen hole pipes 8 to form a water film. In which the sealing plate 9 of each gap area B may be centrally perforated with nozzles 10, while a single gap area B may be provided with a plurality of nozzles 10, since some of the electric precipitator electrodes have a longer length, which nozzles 10 are spaced apart in the length direction of the screen hole pipe 8, as shown in fig. 1. As shown in fig. 6, a part of the charged dust C1 in the air flow is in contact with the inner wall of the screen hole pipe 8 in the air flow region a and loses electricity and falls down or is absorbed by a water film (formed by spraying by the spray header 7 of the spray layer and by spraying by the nozzle 10 of the gap region B and penetrating from the through hole of the screen hole pipe 8) on the inner wall surface of the screen hole pipe 8. After the other part of charged dust C2 is driven to the inner wall of the screen hole pipe 8, the charged dust C passes through the through hole 8a formed in the screen hole pipe 8, and enters the gap area B to be in contact with the outer wall of the screen hole pipe 8 to lose electricity and fall or be adsorbed by a water film on the outer wall surface of the screen hole pipe 8, so that the effect of combining the inner effect and the outer effect of the screen hole pipe 8 is achieved, and the dust removal efficiency is improved.

In the preferred embodiment, the screen hole pipes 8 are round pipes and are closely arranged side by side in rows, and the screen hole pipes 8 in adjacent rows are staggered, that is, a gap area B is formed between every three screen hole pipes 8, as shown in fig. 3 and 5. In addition, the shrouding 9 at top is the conducting plate, and shrouding 9 is electric conduction with each sieve pore tube 8. Since the closely arranged screen hole pipes 8 are in close proximity to each other, the individual screen hole pipes 8 in the circumferential direction of the gap area B are also directly conducted, whereby a "faraday cage" is formed, shielding the electric field outside the gap area, and dust separated into the gap area B is not affected by the electric field force. It will be appreciated that in some embodiments the screen hole pipes 8 may not be closely arranged, and that in order to form a "faraday cage" a conductive plate may be added between the walls of the screen hole pipes 8 to close the passage in the circumferential direction to the gap region B.

In embodiment 2, as shown in fig. 7, in this embodiment, the round screen hole pipes 8 are arranged in a row-column matrix arrangement, and the rest of the structure is the same as that of embodiment 1, and compared with embodiment 1, only the size of the gap area B is adjusted, so that the gap area B has enough space to arrange the nozzles 10, and is suitable for the screen hole pipes 8 with smaller pipe diameters.

In embodiment 3, as shown in fig. 8, in this embodiment, the cross section of the screen hole pipes 8 is hexagonal, the screen hole pipes 8 are closely arranged, and six screen hole pipes 8 are disposed around one gap area B, and the rest of the structure is the same as that of embodiment 1. The structure can effectively expand the space B of the clearance area, improve the arrangement density of the screen hole pipes 8 and is also suitable for the screen hole pipes 8 with smaller pipe diameters.

Claims

1. The utility model provides a vertical wet electrostatic precipitator, its characterized in that includes a plurality of dust collecting electrode and negative pole line, the dust collecting electrode is the screen hole pipe that the pipe wall cloth has a plurality of through-holes, the negative pole line set up in the dust collecting electrode, the top of screen hole pipe is equipped with the shrouding, each is connected to the shrouding screen hole pipe, the shrouding shields each the clearance region between the screen hole pipe, set up in the clearance region to the nozzle of water spray of the outer wall of screen hole pipe.

2. A vertical wet electrostatic precipitator according to claim 1, in which the cross-section of the screen hole pipe is circular and the cathode wires are arranged along the axis of the screen hole pipe.

3. A vertical wet electrostatic precipitator according to claim 1, in which the nozzles are provided in a plurality at intervals along the axial direction of the screen hole pipe.

4. A vertical wet electrostatic precipitator according to claim 1, in which the sealing plates are electrically conductive plates which are in electrical communication with the respective screen hole pipes, the screen hole pipes constituting the gap region being connected to each other and in electrical communication in the circumferential direction of the gap region.

5. The vertical wet electrostatic precipitator according to claim 1, wherein the cross section of the screen hole pipes is circular, and adjacent screen hole pipe outer walls are closely fitted.

6. The vertical wet electrostatic precipitator of claim 5, wherein said screen hole pipes are arranged in a plurality of rows, said screen hole pipes of adjacent rows are staggered, and the circumference of said gap area is the walls of three adjacent screen hole pipes.