A wet electrostatic precipitator

Abstract

The invention discloses a wet electrostatic precipitator, belonging to the technical field of dust removal equipment, comprising a shell, wherein an air inlet and an air outlet are respectively arranged below and above the shell, an electric field component and a water film component are arranged inside the shell, the electric field component comprises an anode tube and a cathode wire, the anode tube and the cathode wire are suspended in the shell through a suspension mechanism, the cathode wire is located in the anode tube, and the anode tube and the cathode wire are arrayed in multiple groups, a guide ridge is arranged in the anode tube, the guide ridge is spirally arranged on the anode tube wall from top to bottom around the axis of the anode tube, the spiral rise angle of the guide ridge is 70°~80°, and the guide ridge is circumferentially arrayed around the axis of the anode tube, the water film component is arranged above the anode tube, the water flow of the water film is guided by the guide ridge, thereby forming alternating diversion and convergence, avoiding the water film from gathering in the lower half of the anode tube, so that the water film can cover the entire inner wall of the anode tube, and avoiding the accumulation of dust on the inner wall of the anode tube.

Description

Technical Field

[0001] The invention relates to the technical field of dust removal equipment, and in particular to a wet electrostatic precipitator. Background Art

[0002] Electrostatic precipitator is a precipitator that uses electrostatic force (Coulomb force) to separate particles from airflow. Existing electrostatic precipitators are classified in different ways, such as plate type and tube type, horizontal flow type and vertical flow type, dry type and wet type. When the electrostatic precipitator is working, there are three main steps: charging suspended particles, capturing charged particles in the electric field, and removing particles captured on the dust collecting plate. Its characteristics are small airflow resistance, ability to handle high-temperature gas, dust removal efficiency of up to 99-99.9%, not affected by the moisture contained in the dust particles, suitable for handling gases with low dust concentration and dust particle size of 0.05-50μm, but high investment and maintenance costs, large floor space, and many electrical properties of particles affect dust removal efficiency. Among them, wet electrostatic precipitators mainly form a layer of water film on the surface of the dust collecting electrode by spraying water or overflowing water to clean the electrode plate. The use of wet cleaning can avoid the re-flying of the settled dust and achieve higher dust removal efficiency. Since there is no vibration device, the operation is more stable. In order to increase the flux, enhance the electric field strength and increase the dust collecting area, the existing wet electrostatic precipitators mostly use honeycomb plates and circular tubular plates. However, no matter whether honeycomb plates, plate plates, square tubular plates or circular tubular plates are used, when a water film is formed on the plate through a nozzle or an overflow trough, the water film tends to gather on the lower half of the plate, and there is a problem that the entire dust collecting surface of the plate cannot be covered. This is because the water discharge from the nozzle or the overflow trough is uneven, and the water flow directly flows downward after converging on the plate, and it is impossible to form a uniform or larger water film on the plate, which makes it impossible to clean all the dust collecting surfaces of the plate, and positive dust and dirt are formed on the plate. As time goes by, the dust and dirt gradually expand, reducing the dust removal effect. Summary of the invention

[0003] In order to overcome the defects of the prior art, the present invention provides a wet electrostatic precipitator.

[0004] The technical solution adopted by the present invention to solve its technical problems is: a wet electrostatic precipitator, including a shell, with an air inlet and an air outlet respectively provided below and above the shell, an electric field component and a water film component are provided inside the shell, the electric field component includes an anode tube and a cathode wire, the anode tube and the cathode wire are suspended in the shell by a suspension mechanism, the cathode wire is located in the anode tube, and the anode tube and the cathode wire are arrayed in multiple groups, a guide ridge is provided in the anode tube, the guide ridge is spirally arranged on the anode tube wall from top to bottom around the axis of the anode tube, the spiral rise angle of the guide ridge is 70°~80°, and the guide ridge is circumferentially arrayed in multiple groups around the axis of the anode tube, and the water film component is arranged above the anode tube.

[0005] Preferably, the anode tube is a round tube, the guide ridge is spirally arranged on the tube wall from top to bottom, the top of the guide ridge cross section is a gradual arc, and the outer edges on both sides of the guide ridge smoothly transition to the tube wall of the anode tube.

[0006] Preferably, at least six groups of guide ridges are arranged in a circumferential array around the axis of the anode tube, and the vertical spacing between two groups of guide ridges adjacent to each other in the vertical direction is not less than the radius of the circular tube.

[0007] Preferably, the cross section of the anode tube is a regular polygon, and a chamfer is provided between two adjacent side walls of the inner hole of the anode tube, the guide oblique ridge includes multiple sections of guide convex ridges, the top of the guide convex ridge cross section is a gradual arc, the outer edges on both sides of the guide convex ridge smoothly transition with the tube wall of the anode tube, and the two ends of the guide convex ridge are respectively connected to two groups of side walls with adjacent chamfers.

[0008] Preferably, both ends of the guide ridge are sharp, and the projection of the guide ridge in the vertical direction is curved.

[0009] Preferably, the spacing between two groups of guide ridges adjacent to each other in the vertical direction is not less than the width of a single group of side walls of the anode tube.

[0010] Preferably, the water film assembly includes a water film generating device and a cleaning nozzle, the water film generating device includes a film-forming guide ring and multiple groups of water inlet pipes, an annular water storage cavity is formed inside the film-forming guide ring, the multiple groups of water inlet pipes are respectively connected to the annular water storage cavity, and the distances between the connection points of two adjacent groups of water inlet pipes and the annular water storage cavity are the same, and a multiple group of diversion guide grooves are provided in a circumferential array at the lower part of the film-forming guide ring, and the angle between the diversion guide grooves and the vertical direction is 30°~70°, and the cleaning nozzle is arranged directly above the central axis of the film-forming guide ring.

[0011] Preferably, the outlet end of the diverter channel is arc-shaped and inclined toward the side of the anode tube, the outlet ends of the multi-component diverter channels are in a circular ring shape, and the diameter of the inlet end of the diverter channel is larger than the diameter of the outlet end.

[0012] Preferably, the angle between the diversion guide groove and the vertical direction is 45°.

[0013] Preferably, the angle between the diversion guide groove and the vertical direction is 60°.

[0014] The beneficial effects of the present invention are as follows: the water flow of the water film is guided by the guide oblique ridges, thereby forming alternating diversion and convergence, avoiding the water film from gathering in the lower half of the anode tube, allowing the water film to cover the entire inner wall of the anode tube, avoiding dust and dirt from accumulating on the inner wall of the anode tube. Compared with the prior art, the problem that the water film cannot cover the dust collecting surface of the anode tube is effectively avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a three-dimensional diagram of the anode tube assembly state in Example 1 of the present invention;

[0016] Figure 2 is a top view of the anode tube in Example 1 of the present invention;

[0017] Figure 3 It is a partial enlarged schematic diagram of the anode tube in Example 1 of the present invention;

[0018] Figure 4 is a partial cross-sectional schematic diagram of the anode tube in Example 1 of the present invention;

[0019] Figure 5 A bottom view of a film forming guide ring in an embodiment of the present invention;

[0020] Figure 6 It is a cross-sectional schematic diagram of a film-forming guide ring in an embodiment of the present invention;

[0021] Figure 7 is a three-dimensional diagram of the anode tube assembly state in Example 2 of the present invention;

[0022] Figure 8 is a top view of the anode tube in Example 2 of the present invention;

[0023] Fig. 9 It is a partial enlarged schematic diagram of the anode tube in Example 2 of the present invention;

[0024] Fig.10 It is a partial cross-sectional schematic diagram of the anode tube in Example 2 of the present invention.

[0025] In the figure, 10, anode tube, 11, chamfered corner, 12, diversion oblique ridge, 13, diversion convex ridge, 20, film-forming guide ring, 21, annular water storage cavity, 22, diversion guide groove. DETAILED DESCRIPTION

[0026] The specific embodiments of the present invention are further described below in conjunction with the accompanying drawings. It should be noted that the description of these embodiments is used to help understand the present invention, but does not constitute a limitation of the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0027] Example 1

[0028] As attached Figure 1-6As shown, a wet electrostatic precipitator provided by the present invention comprises a shell, an air inlet and an air outlet are respectively arranged at the bottom and the top of the shell, an electric field component and a water film component are arranged inside the shell, the electric field component comprises an anode tube 10 and a cathode wire, the anode tube 10 and the cathode wire are suspended in the shell by a suspension mechanism, the cathode wire is located in the anode tube 10, and the anode tube 10 and the cathode wire are arrayed in multiple groups, the anode tube 10 is a circular tube, a guide ridge 12 for drainage is arranged in the anode tube 10, the guide ridge 12 is spirally arranged on the wall of the circular tube from top to bottom around the axis of the anode tube 10, and ... Six groups of inclined ridges 12 are arranged in a circumferential array around the axis of the anode tube 10. The upper and lower spacing of two groups of diversion inclined ridges 12 adjacent to each other in the vertical direction is not less than the radius of the circular tube. The top of the cross section of the diversion inclined ridge 12 is a gradual arc, and the outer edges on both sides of the diversion inclined ridge 12 smoothly transition with the tube wall of the anode tube 10. The spiral rise angle of the diversion inclined ridge 12 is 70°. The water film component is arranged above the anode tube 10. The water film component includes a water film generating device and a cleaning nozzle. The cleaning nozzle is a rotating nozzle, which is used to flush the anode tube 10, or to disturb the water film and increase the flushing force of the water film flow. It can be disconnected intermittently. When the cleaning nozzle is turned on or when the dust concentration is high, the water film generating device includes a film forming guide ring 20 and a plurality of water inlet pipes. An annular water storage cavity 21 is formed inside the film forming guide ring 20. The plurality of water inlet pipes are respectively connected to the annular water storage cavity 21, and the distances between the connection points of two adjacent water inlet pipes and the annular water storage cavity 21 are the same. A plurality of diversion guide grooves 22 inclined downward are arranged in a circumferential array at the lower part of the film forming guide ring 20. The diversion guide grooves 22 are connected to the annular water storage cavity 21. The angle β between the diversion guide grooves 22 and the vertical direction is 45°. The outlet end of the diversion guide grooves 22 is arc-shaped, and the diversion guide grooves 22 are arranged at an angle of 45° to the vertical direction. The outlet end of the guide groove 22 is inclined toward the side of the anode tube 10. The outlet end of the multi-component diversion guide groove 22 is formed into a circular ring. When the water flows out from the outlet end of the diversion guide groove 22, it will gradually be diverted under the action of gravity and its own inertia, and deflect outward along the radial direction of the anode tube 10. After falling on the tube wall of the anode tube 10, it flows downward along the tube wall. The caliber of the inlet end of the diversion guide groove 22 is larger than the caliber of the outlet end. The flow rate of the water flow at the outlet end of the diversion guide groove 22 is increased by converging, and a more uniform water film is formed on the anode tube 10. The cleaning nozzle is arranged directly above the central axis of the film-forming guide ring 20.

[0029] Specifically, after water is injected into the annular water storage cavity 21 through the water inlet pipeline, the water flows downward along the diverter groove 22. Since the angle β between the diverter groove 22 and the vertical direction is 45°, the water flowing out of the outlet end of the diverter groove 22 gradually disperses on the tube wall of the anode tube 10 in a parabolic manner, and forms a uniform water film on the tube wall of the anode tube 10 through multiple diverter grooves 22. After the water film assembly forms a relatively uniform water film above the anode tube 10, the water flows downward under the action of gravity. After encountering the diverter ridge 12, part of the water flows over the diverter ridge 12 and continues to flow downward. The remaining part of the water flows obliquely along the guide ridge 12 under the oblique drainage of the guide ridge 12. After merging with the water flowing down from above, part of the water flows over the guide ridge 12 and continues to flow downward, while the remaining part of the water flows obliquely along the guide ridge 12 under the oblique drainage of the guide ridge 12, thereby forming alternating diversion and convergence, avoiding the water film from gathering in the lower half of the anode tube 10, allowing the water film to cover the entire inner wall of the anode tube 10, and avoiding the accumulation of dust on the inner wall of the anode tube 10. Compared with the prior art, the problem that the water film cannot cover the dust collecting surface of the anode tube 10 is effectively avoided.

[0030] Example 2

[0031] As attached Figure 5-10 As shown, the difference between this embodiment and the above embodiment is that the cross section of the anode tube 10 is a regular hexagon, and a chamfer 11 is provided between two adjacent side walls of the inner hole of the anode tube 10, and the guide ridge 12 is arranged on the tube wall of the anode tube 10 in a circumferential spiral from top to bottom around the axis of the anode tube 10, and the guide ridge 12 is arranged in a circumferential array around the axis of the anode tube 10. The spiral rise angle of the guide ridge 12 is 80°, and the guide ridge 12 includes multiple sections of guide convex ridges 13. The top of the cross section of the ridge 13 is a gradual arc shape, the outer edges on both sides of the guide ridge 13 smoothly transition with the tube wall of the anode tube 10, the two ends of the guide ridge 13 are respectively connected to two groups of side walls adjacent to the chamfer 11, both ends of the guide ridge 13 are sharp, and the projection of the guide ridge 13 in the vertical direction is curved, the spacing between the two groups of guide ridges 13 adjacent to each other in the vertical direction is not less than the width of a single group of side walls of the anode tube 10, and the angle β between the diversion guide groove 22 and the vertical direction is 60°.

[0032] Compared with a circular tube, a regular hexagonal anode tube 10 is prone to the problem that the water film cannot cover the dust collecting surface of the anode tube 10. This is because the angle between two adjacent sets of side walls of the regular hexagonal anode tube 10 largely isolates the flow of water between the two adjacent sets of side walls. Therefore, after the angle between the two adjacent sets of side walls of the anode tube 10 is set to a chamfer 11, the water flow is alternately drained between the two adjacent sets of side walls through multiple sets of guide ridges 13.

[0033] Specifically, after the water film assembly forms a relatively uniform water film above the anode tube 10, the water flows downward under the action of gravity. After the water located on the side of the side wall encounters the guide ridge 13, it flows along the chamfer 11 to the adjacent side wall under the oblique drainage of the guide ridge 13. Similarly, when the water flows along the guide ridge 13, part of the water flows downward over the guide ridge 13, and the rest of the water flows along the guide ridge 13 to the adjacent side wall, and this part of the water flowing to the adjacent side wall is gradually divided under the action of gravity, and then flows downward along the side wall, thereby avoiding the water film gathering in the lower half of the anode tube 10 and dust accumulation on the inner wall of the anode tube 10.

[0034] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions and variations of these embodiments are made without departing from the principles and spirit of the present invention, and still fall within the scope of protection of the present invention.

Claims

1. A wet electrostatic precipitator, comprising a shell, wherein an air inlet and an air outlet are respectively arranged below and above the shell, wherein an electric field component and a water film component are arranged inside the shell, wherein the electric field component comprises an anode tube (10) and a cathode wire, wherein the anode tube (10) and the cathode wire are suspended in the shell by a suspension mechanism, wherein the cathode wire is located in the anode tube (10), and wherein the anode tube (10) and the cathode wire are arranged in a plurality of arrays, wherein: The anode tube (10) is provided with a flow guiding oblique ridge (12), which is arranged on the tube wall of the anode tube (10) in a spiral manner from top to bottom around the axis of the anode tube (10), the spiral rise angle of the flow guiding oblique ridge (12) is 70° to 80°, and a plurality of groups of the flow guiding oblique ridges (12) are arranged in a circumferential array around the axis of the anode tube (10), and the water membrane assembly is arranged above the anode tube (10); The water film assembly comprises a water film generating device and a cleaning nozzle, wherein the water film generating device comprises a film forming guide ring (20) and a plurality of water inlet pipes, an annular water storage cavity (21) is formed inside the film forming guide ring (20), the plurality of water inlet pipes are respectively connected to the annular water storage cavity (21), and the distances between the connection points of two adjacent water inlet pipes and the annular water storage cavity (21) are the same, a plurality of groups of flow guide grooves (22) are arranged in a circumferential array at the lower part of the film forming guide ring (20), the flow diversion grooves (22) are connected to the annular water storage cavity (21), and the angle between the flow diversion grooves (22) and the vertical direction is 30° to 70°, and the cleaning nozzle is arranged directly above the central axis of the film forming guide ring (20); The outlet end of the diverter guide groove (22) is arc-shaped, and the outlet end of the diverter guide groove (22) is inclined toward the side of the anode tube (10), the outlet end of the multi-component diverter guide groove (22) is formed into a circular ring, and the caliber of the inlet end of the diverter guide groove (22) is larger than the caliber of the outlet end.

2. The wet electrostatic precipitator according to claim 1, characterized in that: The anode tube (10) is a circular tube, and the flow guiding ridge (12) is spirally arranged on the tube wall of the circular tube from top to bottom. The top of the cross section of the flow guiding ridge (12) is a gradual arc shape, and the outer edges on both sides of the flow guiding ridge (12) smoothly transition to the tube wall of the anode tube (10).

3. The wet electrostatic precipitator according to claim 2, characterized in that: The guide ridges (12) are arranged in at least six groups in a circumferential array around the axis of the anode tube (10), and the vertical spacing between two groups of guide ridges (12) adjacent to each other in the vertical direction is not less than the radius of the circular tube.

4. The wet electrostatic precipitator according to claim 1, characterized in that: The cross section of the anode tube (10) is a regular polygon, and a chamfer (11) is provided between two adjacent side walls of the inner hole of the anode tube (10), the flow guiding inclined ridge (12) comprises a plurality of sections of flow guiding convex ridges (13), the top of the cross section of the flow guiding convex ridge (13) is a gradual arc, the outer edges of both sides of the flow guiding convex ridge (13) smoothly transition with the tube wall of the anode tube (10), and the two ends of the flow guiding convex ridge (13) are respectively connected to two groups of side walls adjacent to the chamfer (11).

5. The wet electrostatic precipitator according to claim 4, characterized in that: Both ends of the guide ridge (13) are sharp, and the projection of the guide ridge (13) in the vertical direction is curved.

6. The wet electrostatic precipitator according to claim 4, characterized in that: The distance between two groups of guide ridges (13) adjacent to each other in the vertical direction is not less than the width of a single group of side walls of the anode tube (10).

7. The wet electrostatic precipitator according to claim 1, characterized in that: The angle between the flow dividing channel (22) and the vertical direction is 45°.

8. The wet electrostatic precipitator according to claim 1, characterized in that: The angle between the flow dividing guide groove (22) and the vertical direction is 60°.

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