A wet electrostatic precipitator with a top air distribution device

Abstract

The present invention relates to a wet electrostatic precipitator with a top air distribution device, which comprises an air inlet pipe, an upper air box chamber, an anode tube chamber and a lower air box chamber from top to bottom, wherein the upper air box chamber is provided with an air distribution device; the anode tube chamber is provided with a plurality of anode tube groups, each anode tube group comprises a plurality of anode tubes, the top and bottom ends of the anode tubes are both open, and can connect the upper air box chamber and the lower air box chamber; an air outlet pipe is provided on the side of the lower air box chamber; the air distribution device comprises an air distribution cone plate and a plurality of air distribution guide plates, the air distribution cone plate is provided with an air inlet hole, and comprises an upper three-dimensional arc plate and a lower straight side plate, the three-dimensional arc plate is conical and the conical surface has a downwardly concave arc; the side plate is connected to the bottom edge of the three-dimensional arc plate and extends to the outside of the air distribution device; the plurality of air distribution guide plates vertically pass through the air distribution cone plate, and an upper air duct is formed between two adjacent air distribution guide plates on the upper surface of the air distribution cone plate, so that the air intake that does not pass through the air inlet hole is changed from longitudinal to transverse.

Description

Technical Field

[0001] The invention belongs to the technical field of wet electrostatic precipitators, and in particular relates to a wet electrostatic precipitator with a top air distribution device. Background Art

[0002] Wet electrostatic precipitator can handle gas containing moisture, trace dust and microparticles. It relies on high-voltage corona discharge to charge dust and droplets. The charged dust and droplets reach the dust collecting electrode plate / tube under the action of the electric field force to remove dust, acid mist, water droplets, aerosols, odor, PM2.5 and other harmful substances in the gas, so as to achieve the purpose of controlling wet atmospheric dust pollution. At present, the gas flow direction of wet electrostatic precipitator is generally horizontal or vertical. One or more windshields are set at the position of the air inlet, or an open-hole air distribution plate is made at the front end of the anode tube chamber. The diameter of the opening is generally 40-50mm. The intake air is dispersed by the windshield or air distribution plate before entering the anode tube chamber. This form causes the wind speed at the projection of the air inlet and the opening to be relatively high (generally 10-20m / s), but the surrounding wind speed is very low, and the farther away from the projection area of ​​the air inlet pipe, the lower the air speed and the less air intake, which causes uneven air distribution, and then leads to uneven wind speed of some anode tubes, which will directly affect the effect of wet electrostatic precipitator and is not conducive to dust collection of the dust collector. In addition, the perforated air distribution plate distributes high-speed air intake on the anode tube in a way that increases resistance, which increases system resistance. Summary of the invention

[0003] In view of the above problems, the present invention provides a wet electrostatic precipitator with a top air distribution device, which includes an air inlet pipe, an upper air box chamber, an anode tube chamber and a lower air box chamber from top to bottom. The upper air box chamber is provided with an air distribution device for receiving the air input from the air inlet pipe and evenly distributing the air in the upper air box chamber; the anode tube chamber is provided with a plurality of anode tube groups, each of which includes a plurality of anode tubes, and the top and bottom ends of the anode tubes are both open and can communicate with the upper air box chamber and the lower air box chamber; the side of the lower air box chamber is provided with an air outlet pipe for outputting the treated gas;

[0004] The air distribution device includes an air distribution cone plate and a plurality of air distribution guide plates. The air distribution cone plate is provided with an air inlet hole, and includes an upper three-dimensional arc plate and a lower flat side plate. The three-dimensional arc plate is conical and its own conical surface has a downwardly concave arc; the side plate is connected to the bottom edge of the three-dimensional arc plate and extends to the outside of the air distribution device; a plurality of air distribution guide plates are distributed on the air distribution cone plate, and each air distribution guide plate vertically passes through the air distribution cone plate, and an upper air duct is formed between two adjacent air distribution guide plates above the air distribution cone plate, so that the air intake that does not pass through the air inlet hole is changed from longitudinal to transverse.

[0005] Optionally, the upper air box chamber is hollow, including an upper conical air distribution chamber and a lower transfer chamber, the conical air distribution chamber is a quadrangular pyramid with a small top and a large bottom, the bottom end of the air intake pipe is connected to the top of the conical air distribution chamber, and the air distribution device is arranged in the conical air distribution chamber to disperse and guide the intake air input by the intake pipe;

[0006] The transfer chamber is a rectangular parallelepiped, and the straight side plates of the air distribution device are flush with the top surface of the transfer chamber.

[0007] Optionally, the top center of the three-dimensional curved plate is a closed conical pointed top structure, the upper surface of the three-dimensional curved plate is a smooth surface with a curvature and concave downward, the lower surface is a smooth surface with a curvature corresponding to the upper surface and convex downward, and the bottom of the three-dimensional curved plate is empty, that is, the cone of the three-dimensional curved plate is hollow inside;

[0008] The bottom edge of the three-dimensional curved plate is circular, elliptical or oblong; the inner side of the side plate is connected to the bottom edge of the three-dimensional curved plate, and the outer side is oblong, that is, the four top corners of the outer side are chamfered to adapt to the shape of the transfer chamber, so that the gas flowing outward through the side plate is evenly distributed in the rectangular transfer chamber.

[0009] Further optionally, on the air distribution cone plate, the aperture of the air inlet holes gradually increases along the direction from the top center to the surrounding of the bottom, and the opening rate gradually increases.

[0010] Optionally, the air distribution guide plates are vertically arranged and include an upper guide plate and a lower guide plate, the upper guide plate is located above the air distribution cone plate, and the lower guide plate is located below the air distribution cone plate; the air distribution guide plates are radially distributed with the top center of the air distribution cone plate as the center.

[0011] Further optionally, the height of the upper guide plate is 2 / 3-5 / 6 of the height of the air distribution cone plate, and the side away from the top center of the air distribution cone plate has an arc convex outward and upward, and the outer edge of the upper guide plate is not longer than the outer edge of the air distribution cone plate; the upper guide plate divides the upper surface of the air distribution cone plate and the space above it into several blocks, and each space forms an upper independent air duct, so that the gas that does not pass through the air inlet hole flows along each upper independent air duct.

[0012] Further optionally, the lower guide plate protrudes from the lower surface of the three-dimensional curved plate, the shape of the lower guide plate is approximately triangular, the top angle is rounded and corresponds to the position where the curvature of the three-dimensional curved plate is the largest, the corner on one side coincides with the bottom edge of the three-dimensional curved plate, and the corner on the other side is on the lower surface of the three-dimensional curved plate and corresponds to the highest point where the upper guide plate and the three-dimensional curved plate are connected;

[0013] The lower guide plate divides the lower surface of the three-dimensional curved plate and the space below into several blocks, each of which forms a lower independent air duct, so that the gas after passing through the air inlet hole flows along each lower independent air duct.

[0014] The traditional cleaning method of wet electrostatic precipitator is hydraulic flushing, which has the problem of cleaning dead corners. The air distribution device of the present invention is conducive to uniform water distribution during cleaning. For the air distribution device and the overall dust collector, the present invention also provides the following solutions.

[0015] Optionally, a plurality of cleaning water pipes are evenly arranged on the inclined side of the cone air distribution chamber, and a plurality of nozzles are evenly arranged on the cleaning water pipes, the nozzles are perpendicular to the cleaning water pipes, and have an angle of 30-70° with the inclined side of the cone air distribution chamber;

[0016] The cleaning water pipe protrudes from the inclined side of the cone air distribution chamber, and an air passage is formed between two adjacent cleaning water pipes to guide the gas input from the edge of the air inlet pipe and flowing along the side of the cone air distribution chamber to be evenly distributed and flow to the transfer chamber.

[0017] Optionally, a motor is provided below the air distribution cone plate and at a position corresponding to the center of the top, and the motor shaft is connected to the lower surface of the air distribution cone plate through a plurality of connecting rods, so that the motor can drive the air distribution cone plate to rotate;

[0018] The motor has its own waterproof cover and is connected to the side of the transfer chamber through a support rod to fix the position of the motor.

[0019] Optionally, a guide umbrella is provided at the center of the lower air box chamber, and a drain port is provided at the bottom of the lower air box chamber. The guide umbrella includes a support rod, an umbrella surface and a retractable device. The support rod is fixed on the center line of the lower air box chamber, and the retractable device is provided on the support rod and connected to the umbrella surface; when the umbrella surface is opened, the highest point of the umbrella surface is lower than the bottom plate of the anode tube chamber, and the umbrella surface has an arc surface convex upward. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the wet electrostatic precipitator with a top air distribution device;

[0021] Figure 2 for Figure 1 A front view schematic diagram of

[0022] Figure 3 It is a structural schematic diagram of the air distribution device;

[0023] Figure 4 is a top view schematic diagram of the air distribution device;

[0024] Figure 5 is a schematic diagram of the lower surface of the air distribution device;

[0025] Figure 6 This is a schematic diagram of the water pipe for cleaning the upper air box room;

[0026] Figure 7is a schematic diagram of an air distribution device and a motor;

[0027] Figure 8 Schematic diagram of the guide parachute in the lower air box chamber.

[0028] In the accompanying drawings, 1-inlet pipe, 2-upper air box chamber, 3-anode tube chamber, 4-lower air box chamber, 5-air distribution device, 6-anode tube, 7-outlet pipe, 8-air distribution cone plate, 9-wind guide plate, 10-air inlet hole, 11-three-dimensional arc plate, 12-side plate, 13-conical air distribution chamber, 14-transfer chamber, 15-top plate, 16-bottom plate, 17-bracket, 18-top center, 19-upper guide plate, 20-lower guide plate, 21-upper independent air duct, 22-lower independent air duct, 23-cleaning water pipe, 24-air duct, 25-motor, 26-guide umbrella, 27-drain port, 28-support rod, 29-umbrella surface, 30-water receiving trough, 31-water outlet. DETAILED DESCRIPTION

[0029] This embodiment provides a wet electrostatic precipitator with a top air distribution device, such as Figure 1-Figure 8 As shown, from top to bottom, it includes an air intake pipe 1, an upper air box chamber 2, an anode tube chamber 3 and a lower air box chamber 4. An air distribution device 5 is provided in the upper air box chamber 2 to receive the air input from the air intake pipe 1 and evenly distribute the air intake in the upper air box chamber 2; the anode tube chamber 3 is provided with a plurality of anode tube groups, each of which includes a plurality of anode tubes 6, and the top and bottom ends of the anode tubes 6 are both open, which can connect the upper air box chamber 2 and the lower air box chamber 4; an air outlet pipe 7 is provided on the side of the lower air box chamber 4 to output the treated gas;

[0030] The air distribution device 5 includes an air distribution cone plate 8 and a plurality of air distribution guide plates 9. The air distribution cone plate 8 is provided with an air inlet hole 10, and includes an upper three-dimensional arc plate 11 and a lower flat side plate 12. The three-dimensional arc plate 11 is conical and its own conical surface has a downwardly concave curvature; the side plate 12 is connected to the bottom edge of the three-dimensional arc plate 11 and extends to the outside of the air distribution device 5; a plurality of air distribution guide plates 9 are distributed on the air distribution cone plate 8, and each air distribution guide plate 9 vertically passes through the air distribution cone plate 8, and an upper air duct is formed between two adjacent air distribution guide plates 9 above the air distribution cone plate 8, so that the air intake that does not pass through the air inlet hole 10 is changed from longitudinal to transverse.

[0031] Optionally, the upper air box chamber 2 is hollow, including an upper conical air distribution chamber 13 and a lower transfer chamber 14, the conical air distribution chamber 13 is a quadrangular pyramid with a small top and a large bottom, the bottom end of the air intake pipe 1 is connected to the top of the conical air distribution chamber 13, and the air distribution device 5 is arranged in the conical air distribution chamber 13, and is used to disperse and guide the intake air input by the intake pipe 1;

[0032] The transfer chamber 14 is a rectangular parallelepiped, and the straight side plate 12 of the air distribution device 5 is flush with the top surface of the transfer chamber 14 (and also flush with the bottom surface of the conical air distribution chamber 13). The transfer chamber 14 receives the gas transferred from the air distribution device 5 and the gas transferred along the side of the conical air distribution chamber 13.

[0033] Optionally, the anode tube chamber 3 includes a top plate 15, a plurality of anode tube groups and a bottom plate 16, the top plate 15 is provided with a hollow installation position corresponding to the position of the anode tube group, and the bottom plate 16 is also provided with a hollow installation position corresponding to the position of the anode tube group, which is used to install the top and bottom of the anode tube group, and the plurality of anode tube groups are distributed in an array in the anode tube chamber 3;

[0034] The anode tubes 6 of each anode tube group are closely arranged in a cluster, and the top end of each anode tube 6 is connected to the transfer chamber 14, and the bottom end is connected to the lower air box chamber 4, so that the intake air of the upper air box chamber 2 passes through each anode tube 6 and enters the lower air box chamber 4.

[0035] The anode tubes of each anode tube group are closely arranged in a cluster, which can be in various forms. For example, the anode tubes are close to each other, and the cross section of an anode tube group is formed into a square or rectangle, which is convenient for installation and management. A cathode wire is arranged in the anode tube, and the anode tube and the cathode wire are respectively connected to the positive and negative electrodes of the external power supply through a circuit. The installation positions of the top plate 15 and the bottom plate 16 can take various forms as long as they can fix each anode tube. For example, the installation position is provided with a connecting sleeve corresponding to each anode tube, and the anode tube and the connecting sleeve are connected and fastened one by one.

[0036] Optionally, the lower air box chamber 4 is conical, such as a quadrangular pyramid, and an air outlet pipe 7 is provided on any side surface of the lower air box chamber 4 .

[0037] Optionally, a bracket 17 is provided on the outside of the wet electrostatic precipitator for supporting the anode tube chamber 3 and the lower air box chamber 4, so that the lower air box chamber 4 is suspended in the air, and the legs of the bracket 17 are fixed on the ground.

[0038] Optionally, the top center 18 of the three-dimensional curved plate 11 is a closed conical pointed top structure, the upper surface of the three-dimensional curved plate 11 is a smooth surface with a curvature and concave downward, the lower surface is a smooth surface with a curvature corresponding to the upper surface and convex downward, and the bottom of the three-dimensional curved plate 11 is empty, that is, the cone of the three-dimensional curved plate 11 is hollow inside;

[0039] The bottom edge of the three-dimensional arc plate 11 is circular, elliptical or oblong; the inner edge of the side plate 12 is connected to the bottom edge of the three-dimensional arc plate 11, and the outer edge is oblong, that is, the four top corners of the outer edge are chamfered to adapt to the shape of the transfer chamber 14, so that the gas flowing outward through the side plate 12 is evenly distributed in the rectangular transfer chamber 14.

[0040] Further optionally, on the air distribution cone plate 8, the aperture of the air inlet hole 10 gradually increases along the direction from the top center 18 to the bottom periphery, and the opening rate gradually increases, so that the air distribution cone plate 8 at the projection of the air inlet pipe 1 allows a smaller amount of gas to pass through the air distribution cone plate 8 into the transfer chamber 14, and other parts of the air distribution cone plate 8 allow more gas to pass through the air distribution cone plate 8.

[0041] Optionally, the air distribution guide plate 9 is vertically arranged and includes an upper guide plate 19 and a lower guide plate 20, the upper guide plate 19 is located above the air distribution cone plate 8, and the lower guide plate 20 is located below the air distribution cone plate 8; the air distribution guide plates 9 are radially distributed with the top center 18 of the air distribution cone plate 8 as the center.

[0042] Further optionally, the height of the upper guide plate 19 is 2 / 3-5 / 6 of the height of the air distribution cone plate 8, and the side away from the top center 18 of the air distribution cone plate 8 has an arc convex outward and upward, and the outer edge of the upper guide plate 19 is not longer than the outer edge of the air distribution cone plate 8; the upper guide plate 19 divides the upper surface of the air distribution cone plate 8 and the space above it into several blocks, and each space forms an upper independent air duct 21, so that the gas that does not pass through the air inlet hole 10 flows along each upper independent air duct 21.

[0043] Further optionally, the lower guide plate 20 protrudes from the lower surface of the three-dimensional curved plate 11, and the shape of the lower guide plate 20 is approximately triangular, the top angle is rounded and corresponds to the position where the curvature of the three-dimensional curved plate 11 is the largest, the corner on one side coincides with the bottom edge of the three-dimensional curved plate 11, and the corner on the other side is on the lower surface of the three-dimensional curved plate 11 and corresponds to the highest point where the upper guide plate 19 and the three-dimensional curved plate 11 are connected;

[0044] The lower guide plate 20 divides the lower surface of the three-dimensional arc-shaped plate 11 and the space below into several blocks, each of which forms a lower independent air duct 22 , so that the gas after passing through the air inlet hole 10 flows along each lower independent air duct 22 .

[0045] The present invention designs the air distribution device 5, and the air inlet pipe 1 is directly opposite to the top center 18 and the surrounding area of ​​the three-dimensional arc plate 11, and the size of the surrounding area depends on the size of the diameter of the air inlet pipe 1. The air inlet hole 10 in the area close to the top center 18 has a smaller aperture and a lower opening rate. Therefore, the air volume passing vertically through the three-dimensional arc plate 11 through the air inlet hole 10 at the projection of the air inlet (where the wind speed is higher) will become smaller, and most of the air volume (intake air volume) will be along the upper surface (arc surface) of the air distribution cone plate 8. The gas flow direction gradually changes from vertical to horizontal (i.e. horizontal), and is guided out from each upper independent air duct 21, which is conducive to guiding the intake air to each corner of the transfer chamber 14, thereby making the air distribution uniform. While the intake air flows outward along the upper surface of the air distribution cone plate 8, gas continuously passes through the air distribution cone plate 8 from the air inlet hole 10, and the closer to the outer edge of the air distribution cone plate 8, the greater the air volume passing through the air inlet hole 10.

[0046] For the air intake passing through the air distribution cone plate 8 (i.e., the air intake under the air distribution cone plate 8), a part of it can be led out along each lower independent air duct 22 to further disperse the gas evenly. The rectangular transfer chamber 14 further transfers the air intake to the anode tube chamber 3. The above design can improve the situation where the four corners of the traditional square anode tube chamber 3 have less air intake. The rounded arc design of the upper guide plate 19 and the lower guide plate 20 of the present invention increases the corresponding wind beam dispersion area.

[0047] In short, the air distribution device 5 makes the air volume and wind speed of the top air intake more evenly distributed, and then makes the air volume and wind speed entering the anode tube more evenly distributed, reduces the uneven air intake at the corners of the wet electrostatic precipitator, improves the efficiency of the wet electrostatic precipitator, and enhances the guarantee of dust removal and demisting standards. The present invention utilizes an air distribution cone plate 8 to form an open perforated plate for air distribution and change the air intake direction, which reduces system resistance compared to traditional perforated air distribution plates. In addition, the horizontal projection of the air distribution cone plate 8 is a rounded rectangle, which is similar to the rectangular shape of the anode tube chamber 3, and is conducive to air distribution at the corners.

[0048] The conventional cleaning method of wet electrostatic precipitator is hydraulic flushing, which has the problem of cleaning dead corners. The air distribution device 5 of the present invention is conducive to uniform water distribution during cleaning. With respect to the air distribution device 5 and the overall precipitator, the present invention also provides the following solutions.

[0049] Optionally, a plurality of cleaning water pipes 23 are evenly arranged on the inclined side of the cone air distribution chamber 13, and a plurality of nozzles are evenly arranged on the cleaning water pipes 23, the nozzles are perpendicular to the cleaning water pipes 23, and have an angle of 30-70° with the inclined side of the cone air distribution chamber 13;

[0050] The cleaning water pipes 23 are distributed longitudinally along the inclined side of the conical air distribution chamber 13; the cleaning water pipes 23 protrude from the inclined side of the conical air distribution chamber 13, and an air duct 24 is formed between two adjacent cleaning water pipes 23, which is used to guide the gas input from the edge of the air inlet pipe 1 and flowing along the side of the conical air distribution chamber 13 to be evenly distributed and flow to the transfer chamber 14.

[0051] Optionally, a motor 25 is provided below the air distribution cone plate 8 and at a position corresponding to the top center 18, and the motor shaft is connected to the lower surface of the air distribution cone plate 8 through a plurality of connecting rods, so that the motor can drive the air distribution cone plate 8 to rotate;

[0052] The motor 25 has its own waterproof cover and is connected to the side of the transfer chamber 14 through a support rod to fix the position of the motor.

[0053] When the wet electrostatic precipitator needs to be cleaned, the nozzle of the cleaning water pipe 23 sprays water to the air distribution device 5, and the air distribution device 5 rotates horizontally at a relatively slow speed. The nozzle tilting device can clean the side of the air distribution guide plate 9 and dynamically clean the air distribution cone plate 8 in all directions. When the air distribution device 5 rotates faster, it can use the centripetal force to throw the cleaning water on itself to the inclined side of the cone air distribution chamber 13, and the water sprayed by the nozzle to the air distribution device 5 is also rebounded by the air distribution device 5 to the inclined side of the cone air distribution chamber 13. The two effects work together to clean the inclined side of the cone air distribution chamber 13. Due to the uniform symmetry of the structure of the air distribution device 5, the water thrown back to the side of the cone air distribution chamber 13 by the air distribution device 5 is also relatively uniform in the circumferential direction of the air distribution device 5. The water flowing down along the inclined side of the cone air distribution chamber 13 can also clean the side of the transfer chamber 14. In this way, only one water pipe and nozzle are used to clean the air distribution device 5 and the side wall of the upper air box chamber 2, while the traditional method requires the provision of two or more water pipes / nozzles.

[0054] Optionally, a guide umbrella 26 is provided at the center of the lower air box chamber 4, and a drain port 27 is provided at the bottom of the lower air box chamber 4. The guide umbrella 26 includes a support rod 28, an umbrella surface 29 and a retracting device. The support rod 28 is fixed on the center line of the lower air box chamber 4, and the retracting device is arranged on the support rod 28 and connected to the umbrella surface 29; when the umbrella surface 29 is opened, the highest point of the umbrella surface 29 is lower than the bottom plate 16, and the umbrella surface 29 has an arc surface convex upward.

[0055] The retractable device is the same as that of an ordinary umbrella, and can fold and unfold the umbrella surface 29. Since the lower air box chamber is a cone with a larger upper part and a smaller lower part, when the diversion umbrella is opened, the umbrella surface opens from the bottom to the top. Those skilled in the art can design the size of the lower air box chamber so that the umbrella surface can be opened or folded. The umbrella surface 29 is made of a flexible material, and can be appropriately contracted when encountering an obstacle, and then automatically rebound and reset.

[0056] Two schemes are provided below for cleaning the side walls of the lower air box chamber 4. Due to the uniformity of water distribution by the air distribution device 5 and the cleaning water pipe 23, the cleaning water can flow relatively evenly into each anode tube to clean its inner wall.

[0057] Optionally, the umbrella cover 29 is circular, and the bottom of the support rod 28 is connected to a driving motor, which is connected to the side wall of the lower air box chamber through a rod to drive the support rod 28 to rotate and drive the rotation of the opened umbrella cover 29, so that the water flowing onto the umbrella cover 29 after flushing the anode tube 6 is thrown to the inclined side of the lower air box chamber 4, and after cleaning the side, it is discharged from the drain port 27.

[0058] Optionally, the umbrella surface 29 is square after being opened, and a circle of water receiving grooves 30 are provided on the upper part of the inclined side of the lower air box chamber 4, and a circle of water outlets 31 are provided on the bottom surface of the water receiving groove 30 close to the side of the lower air box chamber 4;

[0059] When the umbrella surface 29 is opened (the umbrella surface 29 does not rotate), the bottom of the umbrella surface 29 is above the water receiving trough 30 and away from the side of the lower air box chamber 4. The water after flushing the anode tube flows onto the umbrella surface 29, then flows into the water receiving trough 30 along the umbrella surface 29, and finally flows out from the water outlet 31 to clean the side of the lower air box chamber 4. After cleaning the side, it is discharged from the drain port 27.

Claims

1. A wet electrostatic precipitator with a top air distribution device, characterized in that: From top to bottom, it includes an air intake pipe, an upper air box chamber, an anode tube chamber and a lower air box chamber. The upper air box chamber is provided with an air distribution device for receiving the air input from the air intake pipe and evenly distributing the air in the upper air box chamber. The anode tube chamber is provided with a plurality of anode tube groups, each of which includes a plurality of anode tubes. The top and bottom ends of the anode tubes are both open and can connect the upper air box chamber and the lower air box chamber. The side of the lower air box chamber is provided with an air outlet pipe for outputting the treated gas. The air distribution device includes an air distribution cone plate and a plurality of air distribution guide plates. The air distribution cone plate is provided with an air inlet hole and includes an upper three-dimensional arc plate and a lower flat side plate. The three-dimensional arc plate is conical and its own conical surface has a downwardly concave arc; the side plate is connected to the bottom edge of the three-dimensional arc plate and extends to the outside of the air distribution device; a plurality of air distribution guide plates are distributed on the air distribution cone plate, and each air distribution guide plate vertically passes through the air distribution cone plate, and an upper air duct is formed between two adjacent air distribution guide plates on the upper surface of the air distribution cone plate, so that the air intake that does not pass through the air inlet hole is changed from longitudinal to transverse; The top center of the three-dimensional curved plate is a closed conical tip structure, the bottom of the three-dimensional curved plate is empty, and the cone of the three-dimensional curved plate is hollow inside; The air distribution guide plate includes an upper guide plate and a lower guide plate, the upper guide plate is located above the air distribution cone plate, and the lower guide plate is located below the air distribution cone plate; the air distribution guide plates are radially distributed with the top center of the air distribution cone plate as the center of the circle; The upper guide plate divides the upper surface of the air distribution cone plate and the space above it into several blocks, each of which forms an upper independent air duct, so that the gas that does not pass through the air inlet hole flows along each upper independent air duct; The lower guide plate divides the lower surface of the three-dimensional curved plate and the space below into several blocks, each of which forms a lower independent air duct, so that the gas after passing through the air inlet hole flows along each lower independent air duct.

2. The wet electrostatic precipitator with a top air distribution device according to claim 1, characterized in that: The upper air box chamber is hollow, including an upper conical air distribution chamber and a lower transfer chamber. The conical air distribution chamber is a four-sided pyramid that is small on the top and large on the bottom. The bottom end of the air intake pipe is connected to the top of the conical air distribution chamber. The air distribution device is arranged in the conical air distribution chamber to disperse and guide the intake air input by the air intake pipe; the transfer chamber is a rectangular parallelepiped, and the straight side plates of the air distribution device are flush with the top surface of the transfer chamber.

3. The wet electrostatic precipitator with a top air distribution device according to claim 2, characterized in that: The upper surface of the three-dimensional curved plate is a smooth surface with a curvature and concave downward, and the lower surface is a smooth surface with a curvature corresponding to the upper surface and convex downward; The bottom edge of the three-dimensional arc plate is circular, elliptical or oblong; the inner side of the side plate is connected to the bottom edge of the three-dimensional arc plate, and the outer side of the side plate is oblong to adapt to the shape of the transfer chamber, so that the gas flowing outward through the side plate is evenly distributed in the rectangular transfer chamber.

4. The wet electrostatic precipitator with a top air distribution device according to claim 3, characterized in that: On the air distribution cone plate, the aperture of the air inlet hole gradually increases along the direction from the top center to the periphery of the bottom, and the opening rate gradually increases.

5. The wet electrostatic precipitator with a top air distribution device according to claim 4, characterized in that: The height of the upper guide plate is 2 / 3-5 / 6 of the height of the wind distribution cone plate, and the side away from the top center of the wind distribution cone plate has an arc convex outward and upward, and the outer edge of the upper guide plate is not longer than the outer edge of the wind distribution cone plate.

6. The wet electrostatic precipitator with a top air distribution device according to claim 4, characterized in that: The lower guide plate protrudes from the lower surface of the three-dimensional curved plate. The shape of the lower guide plate is approximately triangular, the top angle is rounded and corresponds to the position where the curvature of the three-dimensional curved plate is the largest, the side corner on one side coincides with the bottom edge of the three-dimensional curved plate, and the side corner on the other side is on the lower surface of the three-dimensional curved plate and corresponds to the highest point where the upper guide plate and the three-dimensional curved plate are connected.

7. The wet electrostatic precipitator with a top air distribution device according to claim 2, characterized in that: A plurality of cleaning water pipes are evenly arranged on the inclined side of the cone air distribution chamber, and a plurality of nozzles are evenly arranged on the cleaning water pipes. The nozzles are perpendicular to the cleaning water pipes and have an angle of 30-70° with the inclined side of the cone air distribution chamber. The cleaning water pipe protrudes from the inclined side of the cone air distribution chamber, and an air passage is formed between two adjacent cleaning water pipes to guide the gas input from the edge of the air inlet pipe and flowing along the side of the cone air distribution chamber to be evenly distributed and flow to the transfer chamber.

8. The wet electrostatic precipitator with a top air distribution device according to claim 7, characterized in that: A motor is provided below the air distribution cone plate and at a position corresponding to the center of the top. The motor shaft is connected to the lower surface of the air distribution cone plate through a plurality of connecting rods, so that the motor can drive the air distribution cone plate to rotate.

9. The wet electrostatic precipitator with a top air distribution device according to claim 8, characterized in that: A guide umbrella is provided at the center of the lower air box chamber, a drain port is provided at the bottom of the lower air box chamber, the guide umbrella comprises a support rod, an umbrella surface and a retractable device, the support rod is fixed on the center line of the lower air box chamber, the retractable device is arranged on the support rod and connected to the umbrella surface; when the umbrella surface is opened, the highest point of the umbrella surface is lower than the bottom plate of the anode tube chamber, and the umbrella surface has an arc surface convex upward.

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