High-flow-velocity wet-type electrostatic dust collector

Abstract

The invention provides a high-flow-rate wet-type electrostatic dust collector, and belongs to the technical field of dust collectors, the high-flow-rate wet-type electrostatic dust collector comprises a shell and further comprises an electric field dust collection device, the electric field dust collection device is arranged in an inner cavity of the shell, and the electric field dust collection device comprises a plurality of honeycomb-shaped discharge electrode mechanisms arranged in the axial direction of the inner cavity of the shell; the discharge electrode mechanism comprises an anode tube and a cathode assembly arranged along the axial direction of an inner cavity of the anode tube in a penetrating manner; the water film distribution mechanism is arranged on the side wall of the shell above the anode tube; according to the invention, the plurality of honeycomb-shaped discharge electrode mechanisms are arranged in the inner cavity of the shell, the discharge electrode mechanisms are used for realizing electrostatic dust collection on passing flue gas, and the plurality of discharge electrode mechanisms can improve the dust collection efficiency; meanwhile, the water film distribution mechanism can form continuously distributed water films on the inner wall of the anode tube, so that the continuous dust removal effect on the dust collection electrode can be realized, and the stable dust removal efficiency is kept; and the situation that the flue gas emission concentration exceeds the standard in a short time due to the fact that power is cut off during traditional spraying ash removal is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of dust collectors, and particularly to a high-flow wet electrostatic precipitator. Background Art

[0002] Electrostatic precipitators are relatively common dust removal devices, which are divided into wet electrostatic precipitators and dry electrostatic precipitators. The dust removal principles of wet electrostatic precipitators and dry electrostatic precipitators are basically the same, that is, dust is adsorbed through electrostatic action. The difference lies in the dust cleaning methods after collecting dust. The wet electrostatic precipitator achieves the purpose of removing dust by flushing the electrodes with a cleaning liquid, and the dry electrostatic precipitator makes the dust detach from the electrodes by hammering and vibrating. The wet electrostatic precipitator is not limited by the specific resistance when collecting particulate matter, has a high removal efficiency for inhalable dust, and can also adsorb gases to remove harmful substances such as sulfuric acid mist and heavy metals in flue gas. Therefore, the wet electrostatic precipitator is currently recognized as the most effective device for treating flue gas after desulfurization.

[0003] The electrode is a key component of the wet electrostatic precipitator. If the electrode is damaged or broken, it will cause an increase in the air filtration resistance and may prevent the normal operation of the precipitator. The electrode mechanism in the existing precipitator has a single structure and an unreasonable arrangement along the inside of the precipitator, resulting in problems such as low dust removal efficiency and inconvenient installation. At the same time, the existing method of flushing the electrodes with a cleaning liquid to achieve dust removal is prone to failure, which will cause dust to accumulate on the dust collecting electrode, thus affecting the normal operation of the equipment. Summary of the Invention

[0004] The present invention provides a high-flow wet electrostatic precipitator, which can improve the dust removal efficiency, can realize the continuous dust cleaning effect on the dust collecting electrode, and avoid the situation that the flue gas emission concentration exceeds the standard for a short time when power is cut off during traditional spray cleaning.

[0005] To solve the above technical problems, the present invention adopts the following technical solutions: A high-flow wet electrostatic precipitator, including a housing, further including: An electric field dust removal device, the electric field dust removal device is arranged in the inner cavity of the housing, and the electric field dust removal device includes a plurality of discharge electrode mechanisms arranged in a honeycomb shape along the axial direction of the inner cavity of the housing; Wherein, the discharge electrode mechanism includes a positive electrode tube and a cathode assembly axially penetrating through the inner cavity of the positive electrode tube; and A water film distribution mechanism, the water film distribution mechanism is arranged on the side wall of the housing above the positive electrode tube, and is used to form a water film overflowing along the inner wall of the positive electrode tube in the inner cavity space of the housing at the top of the positive electrode tube.

[0006] Preferably, the electric field dust removal device further includes fixing plates arranged at both ends of the positive electrode tube, and the cathode assembly penetrates through both ends of the positive electrode tube and is distributed through the fixing plates at both ends.

[0007] Preferably, the cathode assembly is arranged along the axial center of the inner cavity of the anode tube.

[0008] Preferably, the cathode assembly includes an outer electrode body arranged along the axis of the inner cavity of the anode tube, an inner electrode body slidably arranged in the inner cavity of the outer electrode body, and several groups of discharge electrode bodies uniformly distributed axially along the outer wall of the inner electrode body. One end of the discharge electrode body far from the inner electrode body passes through the outer electrode body and faces the inner wall of the anode tube.

[0009] Preferably, each group of the discharge electrode bodies includes three that are circumferentially and uniformly distributed along the outer wall of the inner electrode body.

[0010] Preferably, the discharge electrode body includes a connection end rotatably connected to the side wall of the inner electrode body, an extension section extending outward from the connection end, and a discharge tip arranged at the end of the extension section.

[0011] Preferably, a sunk groove is formed in the side wall of the inner electrode body, a connection column is fixedly arranged on the inner wall of the sunk groove, a transfer hole matching the connection column is arranged at the connection end, and a movable hole for the extension section to pass through is arranged on the side wall of the outer electrode body.

[0012] Preferably, four symmetrically arranged extension tubes are communicated with the outer wall of the top end of the housing. The electric field dust removal device further includes a lower mounting frame arranged at the bottom end of the housing for fixing the outer electrode body, an upper mounting frame arranged at the top end of the housing for fixing the inner electrode body, and a driving source for driving the vertical movement of the upper mounting frame.

[0013] Preferably, the upper mounting frame includes two cross bars arranged between two mutually communicated extension tubes and several vertical bars arranged between the cross bars.

[0014] Preferably, the water film distribution mechanism includes a sealing plate hermetically arranged in the inner cavity of the housing and located on the outer wall of the top end of the anode tube, and water inlet pipes oppositely arranged on the side walls of the housing for injecting water into the housing. A water tank is formed in the inner cavity of the housing above the sealing plate.

[0015] It can be seen from the above technical solutions that the present invention has the following beneficial effects: 1. In the present invention, an electric field is formed between the cathode assembly and the inner wall of the anode tube. Dust deposits on the inner wall of the anode tube under the action of the electric field. When it is necessary to clean the dust on the inner wall of the anode tube, the water film distribution mechanism can form a water body in the inner cavity of the housing at the top of the anode tube, and when the water body overflows the top wall of the anode tube, it can continue to flow along the inner wall of the anode tube. The water body that overflows into the anode tube forms a water film on the tube wall, and this water film can clean the dust deposited on the inner wall of the anode tube. In the present invention, by arranging a plurality of honeycomb-shaped discharge electrode mechanisms in the inner cavity of the housing, electrostatic dust removal is achieved for the flue gas passing through. The plurality of discharge electrode mechanisms can improve the dust removal efficiency. At the same time, the water film distribution mechanism can form a continuously distributed water film on the inner wall of the anode tube, which can realize continuous dust cleaning of the dust collecting electrode and maintain a stable dust removal efficiency; it avoids the situation that the flue gas emission concentration exceeds the standard for a short time due to power off during traditional spray dust cleaning.

[0016] 2. In the present invention, the water film distribution mechanism includes a sealing plate that is hermetically arranged in the inner cavity of the housing and on the outer wall of the top of the anode tube. The water inlet pipe is oppositely arranged on the side wall of the housing and is used to inject water into the housing. When injecting water into the inner cavity of the housing through the water inlet pipe, the water body forms a water tank in the inner cavity of the housing above the sealing plate. As the amount of water entering the housing increases, the water body overflows to the inner wall of the anode tube, forms a water film on the inner wall of the anode tube, and this water film will flow down along the inner wall of the anode tube to clean the dust deposited on the inner wall of the anode tube. The continuously flowing water film can realize continuous dust cleaning of the dust collecting electrode and maintain a stable dust removal efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of the present invention; Figure 2 is Figure 1 a schematic diagram of the A - A cross-section in Figure 3 is a schematic structural diagram of the connection between the discharge electrode mechanism and the lower mounting frame and the upper mounting frame; Figure 4 is a schematic structural diagram of the cathode assembly; Figure 5 is a top view of the connection between the cathode assembly and the anode tube; Figure 6 is a schematic structural diagram of the connection between the discharge electrode body and the inner electrode body; Figure 7 is a schematic structural diagram of the water film distribution mechanism.

[0018] In the figure: 10, housing; 20, electrostatic precipitator device; 210, anode tube; 221, outer electrode body; 222, inner electrode body; 223, discharge electrode body; 2231, connection end; 2232, extension section; 2233, discharge tip; 224, sedimentation tank; 225, connection column; 226, transfer hole; 227, movable hole; 230, fixing plate; 310, sealing plate; 320, water inlet pipe; 330, water tank; 40, extension pipe; 50, lower mounting bracket; 60, upper mounting bracket; 610, cross bar; 620, vertical bar. Specific implementation manner

[0019] The following is a detailed description of a preferred implementation manner of the present invention in conjunction with the accompanying drawings.

[0020] To achieve the above object, the embodiments of the present invention adopt the following technical solutions: Refer to Figure 1 , Figure 2 , a high-flow wet electrostatic precipitator, including a housing 10, further including an electrostatic precipitator device 20 and a water film distribution mechanism. The electrostatic precipitator device 20 is arranged in the inner cavity of the housing 10. The electrostatic precipitator device 20 includes a plurality of discharge electrode mechanisms, and the plurality of discharge electrode mechanisms are arranged axially along the inner cavity of the housing 10 in a honeycomb shape. Among them, the discharge electrode mechanism includes an anode tube 210 and a cathode assembly axially penetrating through the inner cavity of the anode tube 210. It should be noted that the cross-sectional area of the anode tube in this embodiment is a regular hexagon. The water film distribution mechanism is arranged at the position of the side wall of the housing 10 above the anode tube 210. Since the discharge electrode mechanism is arranged in the inner cavity of the housing in a honeycomb shape, in this way, an electric field is formed between the cathode assembly and the inner wall of the anode tube 210 during use, and dust is deposited on the inner wall of the anode tube under the action of the electric field. When it is necessary to clean the inner wall of the anode tube, the water film distribution mechanism can form a water body in the inner cavity space of the housing 10 at the top of the anode tube 210, and when the water body overflows the top wall of the anode tube 210, it can continue to flow along the inner wall of the anode tube 210. The water body flowing into the anode tube forms a water film on the tube wall, and this water film can clean the dust deposited on the inner wall of the anode tube. The present invention sets a plurality of discharge electrode mechanisms in a honeycomb shape in the inner cavity of the housing, uses the discharge electrode mechanisms to perform electrostatic dust removal on the passing flue gas, and the plurality of discharge electrode mechanisms can improve the dust removal efficiency. At the same time, the water film distribution mechanism can form a continuously distributed water film on the inner wall of the anode tube, which can realize the continuous dust cleaning effect on the dust collecting electrode and maintain a stable dust removal efficiency; it avoids the situation that the flue gas emission concentration exceeds the standard for a short time when power needs to be cut off during traditional spray dust cleaning.

[0021] Refer to Figure 3, As a preferred technical solution of this embodiment, the electric field dust removal device 20 further includes fixing plates 230 provided at both ends of the anode tube 210. The cathode assembly passes through both ends of the anode tube 210 and is distributed through the fixing plates 230 at both ends. The fixing plates 230 on both sides are located at both ends of the anode tube 210, which has the effect of fixing the anode tube 210. At the same time, in order for the flue gas to flow along the inner wall of the anode tube 210, through holes corresponding to the two ports of the anode tube are provided on the fixing plates 230.

[0022] Furthermore, in terms of this embodiment, the cathode assembly is arranged along the axial center of the inner cavity of the anode tube 210.

[0023] Refer to Figure 4 , Figure 5 , In some embodiments, the cathode assembly includes an outer electrode body 221, an inner electrode body 222, and discharge electrode bodies 223. The outer electrode body 221 is arranged along the axial direction of the inner cavity of the anode tube 210. The inner electrode body 222 is slidably arranged in the inner cavity of the outer electrode body 221, that is, the inner electrode body 222 can axially move along the inner cavity of the outer electrode body 221 under the action of an external force. The number of the discharge electrode bodies 223 is several groups, and several groups of discharge electrode bodies 223 are axially evenly distributed along the outer wall of the inner electrode body 222. At the same time, one end of the discharge electrode body 223 far from the inner electrode body 222 passes through the outer electrode body 221 and faces the inner wall of the anode tube 210, so as to form an electric field between the discharge electrode body and the inner wall of the anode tube.

[0024] Furthermore, each group of the discharge electrode bodies 223 includes three that are circumferentially evenly distributed along the outer wall of the inner electrode body 222. In this way, the angle between the three discharge electrode bodies 223 in each group along the circumference of the inner electrode body 222 is 120°. The evenly distributed discharge electrode bodies combined with the regular hexagonal anode tube can ensure the formation of a stable dust removal electric field.

[0025] Refer to Figure 6 , Further, the discharge electrode body 223 includes a connection end 2231, an extension section 2232, and a discharge tip 2233. The connection end 2231 plays a role in connecting with the outside, and the connection end 2231 is rotatably connected to the side wall of the inner electrode body 222. The extension section 2232 extends outward from the connection end 2231. The discharge tip 2233 is arranged at the end of the extension section 2232. It should be noted that the connection end 2231, the extension section 2232, and the discharge tip 2233 in this embodiment are of an integrally formed structure and are integrally assembled on the side wall of the inner electrode body 222 during use.

[0026] Further, for the convenience of installing the discharge electrode body 223, a sunk groove 224 is provided on the side wall of the inner electrode body 222. At the same time, a connecting column 225 is fixedly provided on the inner wall of the sunk groove 224. Correspondingly, a transfer hole 226 that cooperates with the connecting column 225 is provided at the end of the connecting end 2231. When installing the discharge electrode body 223, the connecting end 2231 is assembled with the connecting column 225 through the transfer hole 226. The existence of the transfer hole 226 can also achieve the effect of the connecting end 2231 rotating with the connecting column 225, so as to facilitate the adjustment of the angle of the discharge electrode body 223.

[0027] Further, for the convenience of the discharge electrode body 223 passing through the outer electrode body 221 and facing the inner wall of the anode tube 210 outward, a movable hole 227 for the extension section 2232 to pass through is provided on the side wall of the outer electrode body 221. During use, the extension section 2232 of the discharge electrode body 223 passes through the movable hole 227 and is distributed outward. The existence of the movable hole 227 can provide a deflection space for the rotation of the discharge electrode body 223, so as to facilitate the adjustment of the distance (i.e., the electrode distance) between the discharge tip 2233 and the inner wall of the anode tube 210.

[0028] During use, when adapting to fluctuations in the flue gas volume, corona closure caused by fine particles, etc., it is necessary to adjust the electrode distance between the discharge tip 2233 and the inner wall of the anode tube. At this time, the inner electrode body 222 can be axially moved along the inner cavity of the outer electrode body 221 by an external force. At this time, the inner electrode body 222 also moves along the inner cavity of the anode tube 210. When the inner electrode body 222 moves, the discharge electrode body 223 thereon will move synchronously. Since the discharge electrode body 223 passes through the outer electrode body 221, it will be blocked by the outer electrode body 221 during movement, causing the discharge electrode body 223 to rotate along the inner electrode body 222, thereby changing the distance between its discharge tip 2233 and the anode tube 210 to achieve the purpose of changing the electrode distance.

[0029] Refer to Figure 1 、 Figure 2 In some embodiments, four symmetrically distributed extension tubes 40 are connected to the outer wall of the top end of the housing 10. Specifically, the extension tubes 40 are distributed in a rectangle along the outer wall of the housing 10. The two extension tubes 40 located on the long side of the rectangle are located in the non-integral diameter direction of the housing 10, and the two extension tubes 40 on the long side are axially located in the same straight line direction. Further, the electric field dust removal device 20 further includes a lower mounting frame 50, an upper mounting frame 60, and a driving source. The lower mounting frame 50 is provided on the inner wall of the bottom end of the housing 10, and the lower mounting frame 50 is used to fix the outer electrode body 221. The upper mounting frame 60 is provided at the top end of the housing 10, and the upper mounting frame 60 is used to fix the inner electrode body 222. The driving source is used to drive the upper mounting frame 60 to move vertically. It should be noted that the driving source in this embodiment can be an electric telescopic rod.

[0030] Reference Figure 2 Furthermore, the upper mounting frame 60 includes a cross bar 610 and a vertical bar 620. There are two cross bars 610, and the two cross bars 610 are arranged between two intersecting epitaxial tubes 40. There are several vertical bars 620, and several vertical bars 620 are arranged between the two cross bars 610. In this way, the cross bars 610 and the vertical bars 620 form a grid-type frame structure. The two ends of the cross bars are located in the epitaxial tubes 40, and the vertical bars are located inside the shell, and the vertical bars are connected to the cross bars. In this way, the cross bars and vertical bars located in the inner cavity of the shell can be used to install the inner electrode body in the honeycomb-shaped discharge electrode mechanism. In this way, under the action of the driving source, the upper mounting frame can be driven to move vertically along the inner cavity of the shell, so as to drive the inner electrode body 222 to move along the inner cavity of the outer electrode body 221, and then drive the discharge electrode body 223 to rotate relative to the inner electrode body 222 to change the discharge electrode pole distance.

[0031] Reference Figure 7 In other embodiments, the water film distribution mechanism includes a sealing plate 310, a water inlet pipe 320 and a water trough 330. The sealing plate 310 is sealed and arranged in the inner cavity of the shell 10, and the sealing plate 310 is located on the outer wall of the top end of the anode tube 210. There are two water inlet pipes 320, and the two water inlet pipes 320 are symmetrically arranged on the side wall of the shell 10. The water inlet pipe 320 is used to inject water into the shell 10. When in use, water is injected into the inner cavity of the shell through the water inlet pipe 320. The water forms a water trough 330 in the inner cavity of the shell 10 above the sealing plate 310. As the amount of water entering the shell increases, the water overflows to the inner wall of the anode tube 210, forming a water film on the inner wall of the anode tube 210, and the water film flows down along the inner wall of the anode tube to clean the dust deposited on the inner wall of the anode tube. The continuously flowing water film can realize the continuous cleaning effect of the dust collecting electrode and maintain a stable dust removal efficiency. Avoid the situation where traditional spray cleaning requires power outage, which causes the flue gas emission concentration to exceed the standard for a short time.

[0032] When in use, the cathode assembly forms an electric field with the inner wall of the anode tube 210, and the dust is deposited on the inner wall of the anode tube under the action of the electric field. When the inner wall of the anode tube needs to be cleaned, the water film distribution mechanism can form a water body in the inner cavity space of the shell 10 at the top of the anode tube 210, and the water body can continue to flow along the inner wall of the anode tube 210 when it overflows the top wall of the anode tube. The water body overflowing into the anode tube 210 forms a water film on the tube wall, and the water film can clean the dust deposited on the inner wall of the anode tube. The present invention arranges a plurality of honeycomb-shaped discharge electrode mechanisms in the inner cavity of the shell 10, and utilizes the discharge electrode mechanisms to realize electrostatic dust removal for the passing flue gas. The plurality of discharge electrode mechanisms can improve the dust removal efficiency. At the same time, the water film distribution mechanism can form a continuously distributed water film on the inner wall of the anode tube, which can realize the continuous cleaning of the dust collecting electrode and maintain a stable dust removal efficiency; avoiding the situation where the traditional spray cleaning requires power off, resulting in a short-term excess of the flue gas emission concentration.

[0033] It should be noted that the high-flow wet electrostatic precipitator in the present invention can be installed on the top of the desulfurization tower, that is, it can be applied to the desulfurization tower and have the same diameter as the desulfurization tower. At this time, there is no need to add additional supports to the high-flow wet electrostatic precipitator. It can reduce the investment and construction costs, and realize the integrated function of dust removal and demisting, meeting the requirements of ultra-low emissions.

[0034] The above-described embodiments are only descriptions of the preferred embodiments of the present invention, and do not limit the scope of the present invention. Without departing from the design spirit of the present invention, various deformations and improvements made by those of ordinary skill in the art to the technical solutions of the present invention shall fall within the protection scope determined by the claims of the present invention.

Claims

1. A high-flow wet electrostatic precipitator, comprising a housing (10), characterized in that: Also includes: An electric field dust removal device (20), the electric field dust removal device (20) being arranged in the inner cavity of the shell (10), the electric field dust removal device (20) comprising a plurality of discharge electrode mechanisms arranged in a honeycomb shape along the axial direction of the inner cavity of the shell (10); Wherein, the discharge electrode mechanism comprises an anode tube (210) and a cathode assembly arranged axially through the inner cavity of the anode tube (210); and A water film distribution mechanism is provided on the side wall of the shell (10) above the anode tube (210) and is used to form a water film overflowing along the inner wall of the anode tube (210) in the inner cavity space of the shell (10) at the top end of the anode tube (210).

2. The high-flow wet electrostatic precipitator according to claim 1, characterized in that: The electric field dust removal device (20) further comprises fixing plates (230) arranged at both ends of the anode tube (210), and the cathode assembly penetrates both ends of the anode tube (210) and is distributed through the fixing plates (230) at both ends.

3. The high-flow wet electrostatic precipitator according to claim 1, characterized in that: The cathode assembly is arranged along the axial center of the inner cavity of the anode tube (210).

4. The high-flow wet electrostatic precipitator according to claim 2, characterized in that: The cathode assembly comprises an outer electrode body (221) axially arranged along the inner cavity of the anode tube (210), an inner electrode body (222) slidably arranged in the inner cavity of the outer electrode body (221), and a plurality of groups of discharge electrode bodies (223) uniformly distributed axially along the outer wall of the inner electrode body (222); an end of the discharge electrode body (223) away from the inner electrode body (222) passes through the outer electrode body (221) and faces the inner wall of the anode tube (210).

5. The high-flow wet electrostatic precipitator according to claim 4, characterized in that: Each group of the discharge electrode bodies (223) comprises three electrodes evenly distributed along the circumference of the outer wall of the inner electrode body (222).

6. The high-flow wet electrostatic precipitator according to claim 5, characterized in that: The discharge electrode body (223) comprises a connection end (2231) rotatably connected to the side wall of the inner electrode body (222), an extension section (2232) extending outward from the connection end (2231), and a discharge tip (2233) arranged at the end of the extension section (2232).

7. The high-flow wet electrostatic precipitator according to claim 6, characterized in that: The side wall of the inner electrode body (222) is provided with a sink groove (224), the inner wall of the sink groove (224) is fixedly provided with a connecting column (225), the connecting end (2231) is provided with a transfer hole (226) matched with the connecting column (225), and the side wall of the outer electrode body (221) is provided with a movable hole (227) for the extension section (2232) to pass through.

8. The high-flow wet electrostatic precipitator according to claim 1, characterized in that: The outer wall at the top end of the shell (10) is connected to an extension tube (40) that is symmetrical in four corners. The electric field dust removal device (20) further comprises a lower mounting frame (50) arranged at the bottom end of the shell (10) for fixing the outer electrode body (221), an upper mounting frame (60) arranged at the top end of the shell (10) for fixing the inner electrode body (222), and a driving source for driving the upper mounting frame (60) to move vertically.

9. The high-flow wet electrostatic precipitator according to claim 8, characterized in that: The upper mounting frame (60) comprises two cross bars (610) arranged between two intersecting extension tubes (40) and a plurality of vertical bars (620) arranged between the cross bars (610).

10. The high-velocity wet electrostatic precipitator according to claim 1, characterized in that: The water film distribution mechanism comprises a sealing plate (310) which is sealingly arranged in the inner cavity of the shell (10) and located on the outer wall of the top end of the anode tube (210), and a water inlet pipe (320) which is arranged on the side wall of the shell (10) and is used to inject water into the shell (10). The inner cavity of the shell (10) above the sealing plate (310) forms a water tank (330).

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