A high-flow-rate wet electrostatic precipitator

Abstract

This invention provides a high-flow-rate wet electrostatic precipitator, belonging to the field of dust collector technology. It includes a housing and an electric field dust removal device, which is disposed within the housing cavity. The electric field dust removal device includes several honeycomb-shaped discharge electrode mechanisms arranged axially along the inner cavity of the housing. Each discharge electrode mechanism includes an anode tube and a cathode assembly extending axially along the inner cavity of the anode tube. A water film distribution mechanism is disposed on the side wall of the housing above the anode tube. This invention achieves electrostatic dust removal of passing flue gas by setting multiple honeycomb-shaped discharge electrode mechanisms within the housing cavity. Multiple discharge electrode mechanisms improve dust removal efficiency. Simultaneously, the water film distribution mechanism forms a continuously distributed water film on the inner wall of the anode tube, enabling continuous cleaning of the collecting electrodes and maintaining stable dust removal efficiency. This avoids the situation where power must be cut off during traditional spray cleaning, leading to short-term exceedances in flue gas emission concentration.

Description

Technical Field

[0001] This invention relates to the field of dust collector technology, specifically to a high-flow-rate wet electrostatic precipitator. Background Technology

[0002] Electrostatic precipitators (ESPs) are a common type of dust removal equipment, divided into wet ESPs and dry ESPs. The dust removal principles of wet and dry ESPs are basically the same, both using electrostatic attraction to adsorb dust. The difference lies in the cleaning method after dust collection. Wet ESPs remove dust by rinsing the electrodes with a cleaning solution, while dry ESPs remove dust by hammering and shaking. Wet ESPs are not limited by resistivity when collecting particulate matter, have high efficiency in removing inhalable dust, and can also adsorb gases, removing sulfuric acid mist and harmful substances such as heavy metals from flue gas. Therefore, wet ESPs are currently recognized as the most effective equipment for treating flue gas after desulfurization.

[0003] Electrodes are a critical component of wet electrostatic precipitators. Damage or breakage of the electrodes can increase air filtration resistance and potentially prevent the precipitator from operating properly. Existing electrode mechanisms in precipitators are often simplistic, with an unreasonable arrangement within the precipitator, resulting in low dust removal efficiency and inconvenient installation. Furthermore, the current method of using cleaning fluid to flush the electrodes for dust removal is prone to malfunction, leading to dust accumulation on the collecting electrodes and affecting the normal operation of the equipment. Summary of the Invention

[0004] This invention provides a high-flow-rate wet electrostatic precipitator, which can improve dust removal efficiency and achieve continuous cleaning of the dust collecting electrode, avoiding the situation where power needs to be cut off during traditional spray cleaning, which leads to a short-term exceedance of the flue gas emission concentration.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] A high-flow-rate wet electrostatic precipitator includes a housing and further includes:

[0007] An electric field dust removal device is disposed in the inner cavity of a housing, and the electric field dust removal device includes a plurality of discharge electrode mechanisms arranged in a honeycomb pattern along the axial direction of the inner cavity of the housing.

[0008] The discharge electrode mechanism includes an anode tube and a cathode assembly axially extending through the inner cavity of the anode tube; and

[0009] A water film distribution mechanism is disposed on the side wall of the housing above the anode tube, and is used to form a water film overflowing along the inner wall of the anode tube in the inner cavity space of the housing at the top of the anode tube.

[0010] Preferably, the electric field dust removal device further includes fixed plates disposed at both ends of the anode tube, and the cathode assembly passes through both ends of the anode tube and is distributed through the fixed plates at both ends.

[0011] Preferably, the cathode assembly is arranged along the axial center of the inner cavity of the anode tube.

[0012] Preferably, the cathode assembly includes an outer electrode body arranged axially along 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 electrodes evenly distributed axially along the outer wall of the inner electrode body. The end of the discharge electrode body away from the inner electrode body passes through the outer electrode body and faces the inner wall of the anode tube.

[0013] Preferably, each group of discharge electrodes includes three electrodes evenly distributed circumferentially along the outer wall of the inner electrode.

[0014] Preferably, the discharge electrode includes a connecting end rotatably connected to the side wall of the inner electrode, an extension segment extending outward from the connecting end, and a discharge tip disposed at the end of the extension segment.

[0015] Preferably, the inner electrode body has a groove on its side wall, a connecting post is fixed on the inner wall of the groove, the connecting end has a transition hole that mates with the connecting post, and the outer electrode body has a movable hole on its side wall for the outer extension section to pass through.

[0016] Preferably, the outer wall at the top of the housing is connected to an extended tube that is symmetrically arranged at four corners. The electric field dust removal device also includes a lower mounting bracket at the bottom of the housing for fixing the outer electrode, an upper mounting bracket at the top of the housing for fixing the inner electrode, and a drive source for driving the upper mounting bracket to move vertically.

[0017] Preferably, the upper mounting frame includes two horizontal bars disposed between two intersecting extension tubes and several vertical bars disposed between the horizontal bars.

[0018] Preferably, the water film distribution mechanism includes a sealing plate sealed in the inner cavity of the housing and located on the outer wall of the top of the anode tube, and a water inlet pipe disposed opposite to the side wall of the housing for injecting water into the housing, wherein the inner cavity of the housing above the sealing plate forms a water tank.

[0019] As can be seen from the above technical solutions, the present invention has the following beneficial effects:

[0020] 1. In this invention, the cathode assembly forms an electric field with the inner wall of the anode tube. 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 of the shell at the top of the anode tube. 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. This water film can clean the dust deposited on the inner wall of the anode tube. This invention sets multiple honeycomb-shaped discharge electrode mechanisms in the inner cavity of the shell. The discharge electrode mechanisms are used to achieve electrostatic dust removal of the passing flue gas. Multiple 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 achieve continuous dust removal of the dust collecting electrode and maintain stable dust removal efficiency. This avoids the situation where the power needs to be cut off during traditional spray cleaning, which leads to the flue gas emission concentration exceeding the standard for a short time.

[0021] 2. In this invention, the water film distribution mechanism includes a sealing plate sealed in the inner cavity of the housing and located on the outer wall of the top of the anode tube. The water inlet pipe is disposed opposite to the side wall of the housing for injecting water into the housing. When water is injected into the inner cavity of the housing through the water inlet pipe, the water will form 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 will overflow to the inner wall of the anode tube and form a water film on the inner wall of the anode tube. The 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 achieve continuous dust removal of the dust collecting electrode and maintain a stable dust removal efficiency. Attached Figure Description

[0022] Figure 1 It is a structural schematic diagram of the present invention;

[0023] Figure 2 for Figure 1 Schematic diagram of section AA;

[0024] Figure 3 This is a schematic diagram showing the connection between the discharge electrode mechanism and the lower and upper mounting frames.

[0025] Figure 4 This is a schematic diagram of the cathode assembly.

[0026] Figure 5 This is a top view showing the connection between the cathode assembly and the anode tube.

[0027] Figure 6 This is a schematic diagram of the connection between the discharge electrode and the internal electrode.

[0028] Figure 7 This is a schematic diagram of the water film distribution mechanism.

[0029] In the diagram: 10, shell; 20, electric field dust removal device; 210, anode tube; 221, outer electrode body; 222, inner electrode body; 223, discharge electrode body; 2231, connecting end; 2232, extension section; 2233, discharge tip; 224, settling tank; 225, connecting column; 226, adapter hole; 227, movable hole; 230, fixing plate; 310, sealing plate; 320, water inlet pipe; 330, water tank; 40, extension tube; 50, lower mounting bracket; 60, upper mounting bracket; 610, horizontal bar; 620, vertical bar. Detailed Implementation

[0030] A preferred embodiment of the present invention will now be described in detail with reference to the accompanying drawings.

[0031] To achieve the above objectives, the embodiments of the present invention adopt the following technical solutions: (Refer to...) Figure 1 , Figure 2 A high-flow-rate wet electrostatic precipitator includes a housing 10, an electric field dust removal device 20, and a water film distribution mechanism. The electric field dust removal device 20 is disposed within the inner cavity of the housing 10 and includes several discharge electrode mechanisms arranged in a honeycomb pattern along the axial direction of the inner cavity of the housing 10. Each discharge electrode mechanism includes an anode tube 210 and a cathode assembly that extends axially through the inner cavity of the anode tube 210. It should be noted that in this embodiment, the anode tube has a regular hexagonal cross-sectional area. The water film distribution mechanism is located on the side wall of the housing 10 above the anode tube 210. Because the discharge electrode mechanisms are arranged in a honeycomb pattern within the inner cavity of the housing, an electric field is formed between the cathode assembly and the inner wall of the anode tube 210 during use. Dust is deposited on the anode under the influence of the electric field. When it is necessary to clean the inner wall of the anode tube, the water film distribution mechanism can form water in the inner cavity of the shell 10 at the top of the anode tube 210. When the water overflows the top wall of the anode tube, it can continue to flow along the inner wall of the anode tube 210. The water that overflows into the anode tube forms a water film on the tube wall. This water film can clean the dust deposited on the inner wall of the anode tube. This invention sets multiple honeycomb-shaped discharge electrode mechanisms in the inner cavity of the shell. The discharge electrode mechanisms are used to achieve electrostatic dust removal of the passing flue gas. Multiple 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 achieve continuous dust removal of the dust collecting electrode and maintain stable dust removal efficiency. This avoids the situation where the power needs to be cut off during traditional spray cleaning, which leads to the flue gas emission concentration exceeding the standard for a short time.

[0032] Reference Figure 3As a preferred technical solution in this embodiment, the electric field dust removal device 20 further includes fixing plates 230 disposed 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 serves to fix the anode tube 210. At the same time, in order to allow the flue gas to flow along the inner wall of the anode tube 210, through holes corresponding to the two ends of the anode tube are opened on the fixing plates 230.

[0033] Furthermore, in this embodiment, the cathode assembly is arranged along the axial center of the inner cavity of the anode tube 210.

[0034] Reference Figure 4 , Figure 5 In some embodiments, the cathode assembly includes an outer electrode 221, an inner electrode 222, and a discharge electrode 223. The outer electrode 221 is axially arranged along the inner cavity of the anode tube 210, and the inner electrode 222 is slidably arranged in the inner cavity of the outer electrode 221. That is, the inner electrode 222 can move axially along the inner cavity of the outer electrode 221 under the action of external force. The number of discharge electrodes 223 is several groups, and the several groups of discharge electrodes 223 are evenly distributed axially along the outer wall of the inner electrode 222. At the same time, the end of the discharge electrode 223 away from the inner electrode 222 passes through the outer electrode 221 and faces the inner wall of the anode tube 210, so as to form an electric field with the inner wall of the anode tube by utilizing the discharge electrode.

[0035] Furthermore, each group of discharge electrodes 223 includes three electrodes evenly distributed along the circumference of the outer wall of the inner electrode 222. In this way, the angle between the three discharge electrodes 223 in each group along the circumference of the inner electrode 222 is 120°. The evenly distributed discharge electrodes, combined with the regular hexagonal anode tube, can ensure the formation of a stable dust removal electric field.

[0036] Reference Figure 6 Furthermore, the discharge electrode 223 includes a connecting end 2231, an extension segment 2232, and a discharge tip 2233. The connecting end 2231 serves to connect with the outside world, and the connecting end 2231 is rotatably connected to the side wall of the inner electrode 222. The extension segment 2232 extends outward from the connecting end 2231, and the discharge tip 2233 is disposed at the end of the extension segment 2232. It should be noted that in this embodiment, the connecting end 2231, the extension segment 2232, and the discharge tip 2233 are integrally formed structures and are assembled on the side wall of the inner electrode 222 as a whole during use.

[0037] Furthermore, to facilitate the installation of the discharge electrode 223, a recess 224 is provided on the side wall of the inner electrode 222, and a connecting post 225 is fixed on the inner wall of the recess 224. Correspondingly, an adapter hole 226 that mates with the connecting post 225 is provided at the end of the connecting end 2231. When installing the discharge electrode 223, the connecting end 2231 is assembled with the connecting post 225 through the adapter hole 226. The existence of the adapter hole 226 can also achieve the effect of rotation of the connecting end 2231 and the connecting post 225, so as to adjust the angle of the discharge electrode 223.

[0038] Furthermore, in order to facilitate the discharge electrode 223 to pass through the outer electrode 221 and face the inner wall of the anode tube 210, a movable hole 227 is provided on the side wall of the outer electrode 221 for the outer extension 2232 to pass through. In use, the outer extension 2232 of the discharge electrode 223 passes through the movable hole 227 and is distributed outward. The presence of the movable hole 227 can provide deflection space for the rotation of the discharge electrode 223, so as to adjust the distance (i.e., electrode spacing) between the discharge tip 2233 and the inner wall of the anode tube 210.

[0039] When in use, to adapt to fluctuations in flue gas volume and corona blockage caused by fine particles, 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 driven by external force to move axially along the inner cavity of the outer electrode body 221. 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 on it will move synchronously. Since the discharge electrode body 223 is set through the outer electrode body 221, it will be hindered by the outer electrode body 221 when it moves, 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, so as to change the electrode distance.

[0040] Reference Figure 1 , Figure 2 In some embodiments, the outer wall of the top of the housing 10 is connected to an extended tube 40 arranged in a quadrangular symmetrical manner. Specifically, the extended tube 40 is distributed in a rectangular shape along the outer wall of the housing 10, and the two extended tubes 40 located on the long side of the rectangle are located in the direction of the non-complete diameter of the housing 10, and the two extended tubes 40 on the long side are axially located in the same straight line direction. Further, the electric field dust removal device 20 also includes a lower mounting frame 50, an upper mounting frame 60 and a driving source. The lower mounting frame 50 is disposed on the inner wall of the bottom end of the housing 10 and is used to fix the outer electrode body 221. The upper mounting frame 60 is disposed on the top of the housing 10 and 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.

[0041] Reference Figure 2 Furthermore, the upper mounting frame 60 includes two horizontal bars 610 and two vertical bars 620. The two horizontal bars 610 are arranged between two intersecting extension tubes 40. The number of vertical bars 620 is several, and the several vertical bars 620 are arranged between two horizontal bars 610. In this way, the horizontal bars 610 and vertical bars 620 form a grid-like frame structure. The two ends of the horizontal bars are located inside the extension tubes 40, and the vertical bars are located inside the shell and are connected to the horizontal bars. In this way, the horizontal bars and vertical bars located in the inner cavity of the shell can be used to install the inner electrode body in the honeycomb discharge electrode mechanism. 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, thereby driving the discharge electrode body 223 to rotate relative to the inner electrode body 222, so as to change the discharge electrode pitch.

[0042] Reference Figure 7 In some embodiments, the water film distribution mechanism includes a sealing plate 310, a water inlet pipe 320, and a water tank 330. The sealing plate 310 is sealed in the inner cavity of the housing 10 and is located on the outer wall of the top end of the anode tube 210. There are two water inlet pipes 320, which are symmetrically arranged on the side wall of the housing 10. The water inlet pipes 320 are used to inject water into the housing 10. In use, water is injected into the inner cavity of the housing through the water inlet pipes 320. The water forms a water tank 330 in the inner cavity of the housing 10 above the sealing plate 310. As the amount of water entering the housing increases, the water overflows to the inner wall of the anode tube 210 and forms a water film on the inner wall of the anode tube 210. 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 achieve continuous dust removal of the dust collecting electrode and maintain stable dust removal efficiency. This avoids the situation where the power needs to be cut off during traditional spray cleaning, which can cause the concentration of flue gas emissions to exceed the standard for a short period of time.

[0043] In use, the cathode assembly forms an electric field with the inner wall of the anode tube 210. 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 of the housing 10 at the top of the anode tube 210. 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 210. The water body that overflows into the anode tube 210 forms a water film on the tube wall. This water film can clean the dust deposited on the inner wall of the anode tube. This invention sets multiple honeycomb-shaped discharge electrode mechanisms in the inner cavity of the housing 10 to achieve electrostatic dust removal of the flue gas. Multiple 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 achieve continuous dust removal of the dust collecting electrode and maintain stable dust removal efficiency. This avoids the situation where the power needs to be cut off during traditional spray cleaning, which leads to the flue gas emission concentration exceeding the standard for a short time.

[0044] It should be noted that the high-flow-rate wet electrostatic precipitator in this invention can be installed on top of the desulfurization tower, meaning it can be applied to the desulfurization tower and has the same diameter as the tower. In this case, no additional support is needed for the high-flow-rate wet electrostatic precipitator. This reduces investment and construction costs and achieves integrated dust removal and demisting functions, meeting ultra-low emission requirements.

[0045] The above-described embodiments are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A high-flow-rate wet electrostatic precipitator, comprising a housing (10), characterized in that, Also includes: An electric field dust removal device (20) is provided in the inner cavity of the housing (10). The electric field dust removal device (20) includes a plurality of discharge electrode mechanisms arranged in a honeycomb shape along the axial direction of the inner cavity of the housing (10). The discharge electrode mechanism includes an anode tube (210) and a cathode assembly axially extending through the inner cavity of the anode tube (210); and A water film distribution mechanism is provided on the side wall of the housing (10) above the anode tube (210) for forming a water film overflowing along the inner wall of the anode tube (210) in the inner cavity space of the housing (10) at the top of the anode tube (210); The electric field dust removal device (20) also includes fixing plates (230) disposed at both ends of the anode tube (210), and the cathode assembly is distributed through both ends of the anode tube (210) and through the fixing plates (230) at both ends; The cathode assembly includes an outer electrode body (221) arranged axially 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 number of discharge electrode bodies (223) evenly distributed axially along the outer wall of the inner electrode body (222). The 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). Each set of discharge electrodes (223) includes three electrodes evenly distributed circumferentially along the outer wall of the inner electrode (222); The discharge electrode (223) includes a connecting end (2231) rotatably connected to the side wall of the inner electrode (222), an extension segment (2232) extending outward from the connecting end (2231), and a discharge tip (2233) disposed at the end of the extension segment (2232). The inner electrode body (222) has a groove (224) on its side wall, and a connecting post (225) is fixed on the inner wall of the groove (224). The connecting end (2231) has a transition hole (226) that cooperates with the connecting post (225). The outer electrode body (221) has an active hole (227) on its side wall for the outer extension section (2232) to pass through.

2. The high-flow-rate 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).

3. The high-flow-rate wet electrostatic precipitator according to claim 1, characterized in that, The outer wall of the top of the housing (10) is connected to an extended tube (40) that is symmetrical in four corners. The electric field dust removal device (20) also includes a lower mounting bracket (50) for fixing the outer electrode body (221) at the bottom of the housing (10), an upper mounting bracket (60) for fixing the inner electrode body (222) at the top of the housing (10), and a drive source for driving the upper mounting bracket (60) to move vertically.

4. The high-flow-rate wet electrostatic precipitator according to claim 3, characterized in that, The upper mounting bracket (60) includes two horizontal bars (610) disposed between two intersecting extension tubes (40) and several vertical bars (620) disposed between the horizontal bars (610).

5. The high-flow-rate wet electrostatic precipitator according to claim 1, characterized in that, The water film distribution mechanism includes a sealing plate (310) that is sealed in the inner cavity of the housing (10) and located on the outer wall of the top end of the anode tube (210), and an inlet pipe (320) that is disposed opposite to the side wall of the housing (10) for injecting water into the housing (10). The inner cavity of the housing (10) above the sealing plate (310) forms a water tank (330).

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