Coal-fired power plant electrostatic dust collection device with purification mechanism

Abstract

The invention relates to the technical field of electrostatic dust collection, and particularly discloses a coal-fired power plant electrostatic dust collection device provided with a purification mechanism, the coal-fired power plant electrostatic dust collection device comprises a dust collection box body of an overall square structure, a supporting frame supported on the ground is fixedly installed below the dust collection box body, and a smoke inlet pipeline communicated with the dust collection box body is fixedly installed on the left side of the dust collection box body; and the smoke inlet pipeline is connected with a waste gas system of the coal-fired power plant. According to the coal-fired power plant electrostatic dust collection device provided with the purification mechanism, in the rotating process of a knocking cam, a push rod on the left side can be extruded, and when the push rod is extruded, a driving rack is driven to move (the driving rack horizontally moves under the limiting effect of a limiting sleeve); therefore, the driven gear drives the flow guide plate to rotate under the meshing connection action of the driving rack and the driven gear, and finally the driving rack is reset under the elastic action of the reset spring, so that reciprocating rotation of the flow guide plate is realized, flue gas entering the dust removal box is uniformly guided, and accumulation is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of electrostatic precipitation, and particularly to an electrostatic precipitator for a coal-fired power plant provided with a purification mechanism. Background Art

[0002] Electrostatic precipitation is an effective air pollution control technology, mainly used in industrial exhaust gas and indoor air purification. The basic principle is to use electrostatic force to adsorb and collect dust and particulate matter in the air. In a coal-fired power plant, coal needs to be burned for power generation operations, and burning coal will generate a large amount of flue gas. At this time, an electrostatic precipitator is needed to treat the dust in the flue gas.

[0003] In the prior art, a Chinese patent with the publication number of CN117483108B discloses an electrostatic precipitator for a thermal power plant, which includes a support component, including an electrostatic precipitator body, multiple dust collecting electrode plates arranged in the electrostatic precipitator body, a mounting frame arranged on the dust collecting electrode plates, and a motor arranged on the side wall of the electrostatic precipitator body; a cleaning component, including a telescopic component arranged on the side wall of the electrostatic precipitator body, a rubbing component arranged between the dust collecting electrode plates, a switching component arranged on the rubbing component, a pushing component arranged on the switching component, a guiding component arranged on the switching component, and a sewage guiding component arranged at the lower end of the dust collecting electrode plates; a collision component, including a transmission component arranged on the output shaft of the motor.

[0004] Again, in the prior art, a Chinese patent with the publication number of CN112588442B discloses an electrostatic precipitator for a thermal power plant, including a box body, a cathode plate, an anode plate, a heat collection tube, a conductive coil, and a replacement component. The cathode plate and the anode plate are fixed inside the box body, and the cathode plate and the anode plate are respectively fixed at both ends of the inner wall of the box body. The cathode plate is arranged in a ring shape, and a replacement component rotatably connected to the upper and lower ends of the box body is arranged inside the cathode plate. The conductive coils are fixed at the upper and lower ends inside the box body, an energy converter is connected to the outside of the conductive coils, and the end of the energy converter away from the conductive coils is connected to the heat collection tube. The heat collection tube covers the entire thermal power plant, and an antistatic layer is coated on other areas of the inner wall of the box body.

[0005] Again, in the prior art, a Chinese patent with the publication number of CN112058494A discloses an electrostatic precipitator for a thermal power plant, including a filtration chamber, an electrostatic precipitation chamber, and an adsorption dust removal chamber. One end of the electrostatic precipitation chamber is provided with a first connection pipe, and the other end of the first connection pipe is hermetically connected to one side of the filtration chamber. An impurity filtration plate is arranged inside the filtration chamber, and an air inlet pipe is arranged on the other side of the filtration chamber. The other end of the electrostatic precipitation chamber is provided with a second connection pipe, and the other end of the second connection pipe is hermetically connected to one side of the adsorption dust removal chamber.

[0006] Combined with the above materials, it can be seen that in the prior art, the purpose of dust removal is generally achieved by passing flue gas into a dust removal box and using electrostatic adsorption. However, in the actual use process, since the box body of the dust removal box is much larger than the diameter of the smoke inlet pipe, the flue gas will be concentrated in one place after entering, and the uneven distribution will affect the overall dust removal effect. Summary of the Invention

[0007] The purpose of the present invention is to provide an electrostatic dust removal device for coal-fired power plants with a purification mechanism to solve the problem of uneven dust distribution and accumulation affecting the subsequent dust removal effect proposed in the above background technology.

[0008] To achieve the above purpose, the present invention provides the following technical solution: An electrostatic dust removal device for coal-fired power plants with a purification mechanism, including a dust removal box body with an overall square structure. A support frame supported on the ground is fixedly installed below the dust removal box body. A smoke inlet pipe communicated with it is fixedly installed on the left side of the dust removal box body. The smoke inlet pipe is connected to the waste gas system of the coal-fired power plant. A maintenance ladder is fixedly installed on the outer surface of the front side of the dust removal box body. A maintenance cover is fixedly installed on the upper surface of the dust removal box body by bolts. A dust discharge hopper communicated with its interior is fixedly installed on the lower surface of the dust removal box body. An adsorption plate arranged vertically is fixedly installed inside the dust removal box body. Four adsorption plates are evenly arranged at equal intervals. Auxiliary convex blocks for increasing the surface area are arranged on the outer surface of the adsorption plate. And the adsorption plate is connected to an electric circuit to make it negatively charged. A corona roller is arranged between adjacent adsorption plates. And the corona roller is connected to an electric circuit to make it positively charged. A deflector for guiding the flue gas is rotatably installed on the left side inside the dust removal box body. And a reciprocating mechanism for driving its rotation is arranged below the deflector. A purification box for purifying chemical harmful substances in the flue gas is fixedly installed outside the right side of the dust removal box body. And an atomizing nozzle for spraying chemical reaction agents is arranged inside the purification box.

[0009] Preferably, the reciprocating mechanism includes a driven gear coaxially and fixedly installed at the lower end of the deflector. And the position of the deflector corresponds to the position of the smoke inlet pipe. And a driving rack meshed with it is arranged on the side of the driven gear.

[0010] Preferably, a through sliding structure is formed between the rear section of the driving rack and the limit sleeve. And the limit sleeve is fixedly installed on the lower surface inside the dust removal box body.

[0011] Preferably, a push rod for driving its movement is fixedly installed at the rear end of the driving rack. And the push rod connects all the driving racks into a whole. And a return spring nested outside the driving rack is fixedly installed between the push rod and the limit sleeve.

[0012] Preferably, the positions of the push rod and the knocking cam correspond to each other, the knocking cam is rotatably connected to the dust removal box body, and the knocking cam is driven to rotate by a driving motor fixedly installed inside the dust removal box body.

[0013] Preferably, the knocking cam contacts and knocks the adsorption plate, and a soft rubber roller is rotatably installed inside the top end of the knocking cam.

[0014] Preferably, a conveying pipeline communicated with the dust removal box body is fixedly installed on the right side of the dust removal box body, the lower end of the conveying pipeline penetrates into the purification box, and outlets arranged at equal intervals are arranged on the side surface of the lower end of the conveying pipeline.

[0015] Preferably, a discharge pipeline communicated with the purification box is fixedly installed on the right side of the purification box, a storage box for storing chemical agents is fixedly installed on the upper surface of the purification box, and the storage box is communicated with the purification box through a connecting pipe with a pump body.

[0016] Preferably, a heat exchange pipeline for heating the chemical agent is fixedly installed inside the storage box, the upper and lower ends of the heat exchange pipeline are connected to the same conveying pipeline, and the heat exchange pipeline is integrally in a bent structure.

[0017] Preferably, the atomizing nozzle is rotatably connected to the connecting pipe, the interior of the atomizing nozzle is communicated with the connecting pipe, and a driving blade for driving the atomizing nozzle to rotate is fixedly installed on the upper surface of the atomizing nozzle.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: The electrostatic dust removal device for coal-fired power plants provided with a purification mechanism adopts a novel structural design, and the specific content is as follows: 1. The flue gas generated in the coal-fired power plant enters the dust removal box through the flue gas inlet pipe. At this time, the corona roller inside the dust removal box ionizes the surrounding air, so that the dust in the entering flue gas is positively charged, and the negative charge in the adsorption plate is used to generate an attraction force, thereby adsorbing the dust in the flue gas on the surface of the adsorption plate to achieve the purpose of dust removal. In this process, the auxiliary convex blocks on the outer surface of the adsorption plate are used to increase the surface area and improve the adsorption capacity of the adsorption plate; Furthermore, during the dust removal process, the driving motor drives the knocking cam to rotate, so that the knocking cam intermittently knocks the adsorption plate. When knocking, the adsorption plate vibrates and shakes off the adsorbed dust, which finally discharges from the dust discharge hopper. In this process, when the knocking block knocks, the rubber roller at its top contacts the adsorption plate to achieve the purpose of protection and avoid damaging the adsorption plate due to long-term knocking.

[0019] 2. During the rotation of the knocking cam, it will also squeeze the push rod on the left side. When the push rod is squeezed, it drives the active rack to move (the active rack moves horizontally under the limiting action of the limiting sleeve), so that the driven gear drives the deflector to rotate under the meshing connection of the active rack and the driven gear. Finally, under the elastic action of the return spring, the active rack returns to its original position, thus realizing the reciprocating rotation of the deflector, evenly guiding the flue gas entering the dust removal box and avoiding accumulation.

[0020] 3. The flue gas after dust removal enters the purification box through the conveying pipeline. At this time, under the action of the pump body, the chemical agent in the storage tank is conveyed to the atomizing nozzle through the connecting pipe and sprayed out, so that the chemical agent is mixed with the flue gas, and the harmful substances in the flue gas are removed by chemical reaction to achieve the purpose of purification; Further, the flue gas in one of the conveying pipelines is discharged into the purification box after passing through the heat exchange pipeline. The waste heat of the flue gas (the flue gas comes from the coal combustion in the power plant and has a large amount of waste heat) is used to heat the chemical agent in the storage tank, so as to reach the optimal reaction temperature, improve the reaction effect, and the flue gas discharged from the conveying pipeline drives the driving blade to rotate, so that the driving blade drives the atomizing nozzle to rotate and expands the spraying range. Brief Description of the Drawings

[0021] Figure 1 It is a schematic diagram of the overall southwest axonometric structure of the present invention; Figure 2 It is a schematic diagram of the internal structure of the dust removal box of the present invention; Figure 3 It is a schematic diagram of the positional relationship structure between the adsorption plate and the corona roller of the present invention; Figure 4 It is a schematic diagram of the transmission relationship structure of the deflector of the present invention; Figure 5 For the present invention Figure 4 The enlarged structure schematic diagram at A in Figure 6 It is a schematic diagram of the knocking cam of the present invention; Figure 7 It is a schematic diagram of the overall southeast axonometric structure of the present invention; Figure 8 It is a schematic diagram of the internal structure of the storage tank of the present invention; Figure 9 It is a schematic diagram of the purification box of the present invention; Figure 10 It is a schematic diagram of the driving blade of the present invention.

[0022] In the figure: 1. Dust removal box body; 2. Support frame; 3. Smoke inlet pipe; 4. Maintenance ladder; 5. Maintenance cover; 6. Dust discharge hopper; 7. Adsorption plate; 8. Corona roller; 9. Auxiliary convex block; 10. Deflector; 11. Driven gear; 12. Driving rack; 13. Limit sleeve; 14. Push rod; 15. Return spring; 16. Knocking cam; 17. Driving motor; 18. Rubber roller; 19. Purification box; 20. Conveying pipe; 21. Discharge pipe; 22. Storage box; 23. Connecting pipe; 24. Atomizing nozzle; 25. Driving blade; 26. Heat exchange pipe. Specific implementation mode

[0023] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0024] Embodiment 1: Please refer to Figures 1-3 , in order to achieve the purpose of flue gas dust removal in this embodiment, the following technical solutions are provided, and specifically disclosed: a dust removal box body 1 with a square structure as a whole, a support frame 2 fixed to the ground is installed below the dust removal box body 1, and a smoke inlet pipe 3 communicated with it is fixedly installed on the left side of the dust removal box body 1. The smoke inlet pipe 3 is connected to the waste gas system of a coal-fired power plant. A maintenance ladder 4 is fixedly installed on the front outer surface of the dust removal box body 1, and a maintenance cover 5 is fixedly installed on the upper surface of the dust removal box body 1 by bolts. A dust discharge hopper 6 communicated with the inside is fixedly installed on the lower surface of the dust removal box body 1. An adsorption plate 7 arranged vertically is fixedly installed inside the dust removal box body 1, and four adsorption plates 7 are evenly arranged at equal intervals. Auxiliary convex blocks 9 for increasing the surface area are arranged on the outer surface of the adsorption plate 7, and the adsorption plate 7 is connected to an electric circuit to make it negatively charged. A corona roller 8 is arranged between adjacent adsorption plates 7, and the corona roller 8 is connected to an electric circuit to make it positively charged. The knocking cam 16 is rotatably connected to the dust removal box body 1, and the knocking cam 16 is driven to rotate by a driving motor 17 fixedly installed inside the dust removal box body 1. The knocking cam 16 contacts and knocks the adsorption plate 7, and a soft rubber roller 18 is rotatably installed inside the top end of the knocking cam 16.

[0025] When using the device, first connect the smoke inlet pipe 3 to the waste gas system of the power plant. At this time, the waste gas generated by the power plant enters the inside of the dust removal box body 1 through the smoke inlet pipe 3. The corona roller 8 inside the dust removal box body 1 is turned on, and the surrounding air is ionized by the corona roller 8, making the air carry positive charges. When the flue gas enters, the dust in it contacts the air and also carries positive charges. At this time, the negative charges in the adsorption plate 7 are used to adsorb the positive charges of the dust to adsorb the dust onto the surface of the adsorption plate 7 (the auxiliary convex blocks 9 on the surface of the adsorption plate 7 can increase the surface area and improve the adsorption capacity). At the same time, turn on the drive motor 17 inside the dust removal box body 1, and use the drive motor 17 to drive the knocking cam 16 to rotate, so that the knocking cam 16 knocks on the adsorption plate 7. When knocking, the rubber roller 18 contacts the adsorption plate 7, making the adsorption plate 7 vibrate, so as to shake off the surface dust and finally discharge it from the dust discharge hopper 6.

[0026] Embodiment Two: Please refer to Figures 4-6 , in order to achieve the purpose of making the incoming flue gas evenly distributed in this embodiment, the following technical solutions are provided, and specifically disclosed: A deflector 10 for guiding the flue gas is rotatably installed on the left side inside the dust removal box body 1, and a reciprocating mechanism for driving its rotation is arranged below the deflector 10. The reciprocating mechanism includes a driven gear 11 coaxially and fixedly installed at the lower end of the deflector 10, and the position of the deflector 10 corresponds to the position of the smoke inlet pipe 3. And a driving rack 12 meshed with the driven gear 11 is arranged on the side of the driven gear 11. The rear section of the driving rack 12 and the limit sleeve 13 form a through-type sliding structure, and the limit sleeve 13 is fixedly installed on the lower surface inside the dust removal box body 1. A push rod 14 for driving its movement is fixedly installed at the rear end of the driving rack 12, and the push rod 14 connects all the driving racks 12 into a whole. And a return spring 15 nested outside the driving rack 12 is fixedly installed between the push rod 14 and the limit sleeve 13. The positions of the push rod 14 and the knocking cam 16 correspond to each other.

[0027] When the knocking cam 16 rotates to the left and squeezes the push rod 14, at this time the push rod 14 drives the driving rack 12 to move (the driving rack 12 can only move horizontally under the limiting action of the limit sleeve 13 outside it). During the movement of the driving rack 12, the driven gear 11 is driven to rotate by the meshing action between it and the driven gear 11, so that the deflector 10 rotates. When the knocking cam 16 disengages from the extrusion with the push rod 14, the driving rack 12 is reset by the elastic action of the return spring 15, thereby driving the driven gear 11 to rotate in the reverse direction. In this way, the deflector 10 reciprocally rotates to evenly guide the flue gas entering the dust removal box body 1, avoiding dust accumulation at one place and affecting the subsequent dust removal effect.

[0028] Embodiment Three: Please refer to Figures 7-10, in order to achieve the purpose of purifying harmful chemical substances in the flue gas in this embodiment, the following technical solutions are provided, and specifically disclosed: A purification box 19 for purifying chemical harmful substances in the flue gas is fixedly installed outside the right side of the dust removal box body 1. An atomizing nozzle 24 for spraying chemical reaction agents is arranged inside the purification box 19. A conveying pipeline 20 communicated with it is fixedly installed on the right side of the dust removal box body 1. The lower end of the conveying pipeline 20 penetrates into the inside of the purification box 19, and outlets arranged at equal intervals are provided on the side surface of the lower end of the conveying pipeline 20. A discharge pipeline 21 communicated with it is fixedly installed on the right side of the purification box 19. A storage box 22 for storing chemical agents is fixedly installed on the upper surface of the purification box 19. The storage box 22 and the purification box 19 are interconnected through a connecting pipe 23 with a pump body. A heat exchange pipeline 26 for heating the chemical agent is fixedly installed inside the storage box 22. The upper and lower ends of the heat exchange pipeline 26 are connected to the same conveying pipeline 20, and the heat exchange pipeline 26 is integrally in a bent structure. The atomizing nozzle 24 is rotatably connected to the connecting pipe 23, and the inside of the atomizing nozzle 24 is internally communicated with the connecting pipe 23. A driving blade 25 for driving its rotation is fixedly installed on the upper surface of the atomizing nozzle 24.

[0029] The flue gas after dust removal is transported to the purification box 19 through the conveying pipeline 20. At the same time, the chemical agent in the storage box 22 is transported to the atomizing nozzle 24 through the connecting pipe 23 under the action of the pump body and sprayed out. The sprayed chemical agent contacts the flue gas and undergoes a chemical reaction, thereby removing harmful substances. The flue gas after dust removal and purification finally discharges from the discharge pipeline 21. During the purification process, the flue gas in one of the conveying pipelines 20 passes through the heat exchange pipeline 26 and then discharges into the purification box 19, thereby using the waste heat of the flue gas to heat the chemical agent in the storage box 22 to reach the optimal reaction temperature. At the same time, the flue gas discharged from the conveying pipeline 20 drives the driving blade 25 to rotate, so that the driving blade 25 drives the atomizing nozzle 24 to rotate, expanding its spraying range.

[0030] In the description of the present invention, unless otherwise specified, the meaning of "a plurality of" is two or more; the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An electrostatic dust removal device for a coal-fired power plant provided with a purification mechanism, comprising a dust removal box (1) having an overall square structure, a support frame (2) supported on the ground being fixedly installed below the dust removal box (1), and a smoke inlet duct (3) connected to the dust removal box (1) being fixedly installed on the left side thereof, characterized in that: The smoke inlet duct (3) is connected to the exhaust gas system of the coal-fired power plant, and a maintenance ladder (4) is fixedly installed on the front outer surface of the dust removal box (1), and a maintenance cover (5) is fixedly installed on the upper surface of the dust removal box (1) by means of bolts, and a dust exhaust hopper (6) connected to the interior of the dust removal box (1) is fixedly installed on the lower surface of the dust removal box (1); A vertically arranged adsorption plate (7) is fixedly installed inside the dust removal box (1), and four adsorption plates (7) are evenly arranged at equal intervals. An auxiliary protrusion (9) for increasing surface memory is arranged on the outer surface of the adsorption plate (7), and the adsorption plate (7) is connected to a circuit so that it carries a negative charge. A corona roller (8) is arranged between adjacent adsorption plates (7), and the corona roller (8) is connected to a circuit so that it carries a positive charge. A guide plate (10) for guiding smoke is rotatably mounted on the left side of the dust removal box (1), and a reciprocating mechanism for driving the guide plate (10) to rotate is arranged below the guide plate (10); A purification box (19) for purifying harmful chemicals in the flue gas is fixedly installed on the right side of the dust removal box (1), and an atomizing nozzle (24) for spraying chemical reaction agents is arranged inside the purification box (19).

2. The electrostatic precipitator of a coal-fired power plant with a purification mechanism according to claim 1, characterized in that: The reciprocating mechanism comprises a driven gear (11) coaxially fixedly mounted on the lower end of the guide plate (10), the position of the guide plate (10) corresponds to the position of the smoke inlet duct (3), and a driving rack (12) meshingly connected therewith is provided on the side of the driven gear (11).

3. The electrostatic precipitator of a coal-fired power plant with a purification mechanism according to claim 2, characterized in that: A through-type sliding structure is formed between the rear section of the active rack (12) and the limiting sleeve (13), and the limiting sleeve (13) is fixedly mounted on the lower surface of the interior of the dust removal box (1).

4. The electrostatic precipitator of a coal-fired power plant with a purification mechanism according to claim 3, characterized in that: A push rod (14) for driving the active rack (12) to move is fixedly mounted at the rear end thereof, and the push rod (14) connects all the active racks (12) into a whole, and a return spring (15) nested outside the active rack (12) is fixedly mounted between the push rod (14) and the limiting sleeve (13).

5. The electrostatic precipitator of a coal-fired power plant with a purification mechanism according to claim 4, characterized in that: The positions of the push rod (14) and the knock cam (16) correspond to each other, the knock cam (16) is rotationally connected to the dust removal box (1), and the knock cam (16) is driven to rotate by a drive motor (17) fixedly mounted inside the dust removal box (1).

6. The electrostatic precipitator of a coal-fired power plant with a purification mechanism according to claim 5, characterized in that: The knocking cam (16) contacts and knocks with the adsorption plate (7), and a soft rubber roller (18) is rotatably mounted on the inner side of the top end of the knocking cam (16).

7. The electrostatic precipitator of a coal-fired power plant with a purification mechanism according to claim 1, characterized in that: A conveying pipe (20) in communication with the dust removal box (1) is fixedly mounted on the right side thereof, and the lower end of the conveying pipe (20) penetrates into the interior of the purification box (19), and outlets arranged at equal intervals are arranged on the side surface of the lower end of the conveying pipe (20).

8. The electrostatic precipitator of a coal-fired power plant with a purification mechanism according to claim 7, characterized in that: A discharge pipe (21) in communication with the purification box (19) is fixedly installed on the right side of the purification box (19), and a storage box (22) for storing chemical agents is fixedly installed on the upper surface of the purification box (19), and the storage box (22) is in communication with the purification box (19) via a connecting pipe (23) with a pump body.

9. The electrostatic precipitator of a coal-fired power plant equipped with a purification mechanism according to claim 8, characterized in that: A heat exchange pipe (26) for heating the chemical agent is fixedly installed inside the storage box (22), and the upper and lower ends of the heat exchange pipe (26) are connected to the same delivery pipe (20), and the heat exchange pipe (26) is an overall bent structure.

10. The electrostatic precipitator of a coal-fired power plant equipped with a purification mechanism according to claim 9, characterized in that: The atomizing nozzle (24) is rotatably connected to the connecting pipe (23), and the atomizing nozzle (24) and the connecting pipe (23) are internally communicated with each other, and a driving blade (25) is fixedly mounted on the upper surface of the atomizing nozzle (24) for driving the atomizing nozzle (24) to rotate.

Images