Electrostatic dust collection equipment for coal gangue decarburization sintering tail gas

Abstract

The invention relates to the technical field of gas treatment, and particularly discloses coal gangue decarburization sintering tail gas electrostatic dust collection equipment which comprises a front box body and a rear box body, a first electrostatic dust collection mechanism is arranged in the front box body, a second electrostatic dust collection mechanism is arranged in the rear box body, and the first electrostatic dust collection mechanism comprises a plurality of anode plates which are arranged at equal intervals left and right; first cathode rods which are arranged in rows are arranged between every two adjacent anode plates; the second electrostatic dust collection mechanism comprises a plurality of sets of steel belt rollers which are arranged at equal intervals in the left-right direction, anode steel belts are arranged between the steel belt rollers in each set, second cathode rods which are arranged in rows are arranged between every two adjacent anode steel belts, and a shoveling and scraping mechanism acting on the anode steel belts is arranged at the rear end of the rear box body; a deslagging mechanism is arranged at the bottom of the rear box body under the shoveling and scraping mechanism; according to the invention, the conductivity difference between dust particles and tar in the tail gas is utilized, so that segmented removal is realized, and the tar after segmented removal can be independently recovered.

Description

Technical Field

[0001] The invention relates to the technical field of gas treatment, and specifically discloses an electrostatic dust removal device for tail gas from coal gangue decarbonization and sintering. Background Art

[0002] Gangue decarbonization sintering is a technology that uses gangue (solid waste generated during coal mining and washing) for high-temperature treatment. Its purpose is to remove the carbon component in the gangue by burning, and then treat the decarbonized sintered material to prepare building raw materials. During the gangue decarbonization sintering process, the exhaust gas composition is very complex, containing a large amount of dust, sulfur oxides, nitrogen oxides, tar and other components, which requires dust removal, desulfurization and denitrification treatment.

[0003] At present, the dust removal treatment for combustion exhaust gas in the industry is mainly divided into two methods: bag dust removal and electrostatic dust removal. Among them, the investment cost and operation cost of bag dust removal are low, but when it is used for the dust removal treatment of coal gangue decarbonization and sintering exhaust gas, the tar in the exhaust gas will adhere to the bag, and it cannot be cleaned by pulse air blowing, resulting in unsatisfactory subsequent dust removal effect. When electrostatic dust removal is used for the dust removal treatment of coal gangue decarbonization and sintering exhaust gas, every time the dust collector runs for a period of time, it needs to be stopped to clean its interior to ensure its electrostatic dust removal effect. The vibration mechanism in the traditional electrostatic precipitator cannot effectively remove the tar attached to the anode, and spray cleaning is required to remove the tar attached to the anode. The design of the entire spray cleaning system not only increases the equipment manufacturing and operation costs, but also the entire electrostatic precipitator needs to stop running for a period of time during spray cleaning. After the cleaning is completed, it is also necessary to wait for the interior to dry before it can be operated, resulting in a significant reduction in its effective operation efficiency. In addition, the tar, dust and cleaning liquid from the spray cleaning are mixed together, which makes it difficult to recycle the tar. Therefore, in view of the technical problems and shortcomings in the existing dust removal process of coal gangue decarbonization and sintering tail gas, this application proposes an electrostatic dust removal device for coal gangue decarbonization and sintering tail gas that can effectively solve the above problems. Summary of the invention

[0004] The present invention aims to provide an electrostatic dust removal device for gangue decarbonization and pyrolysis exhaust gas, so as to solve the problem that when the existing electrostatic dust collector is used for the treatment of gangue decarbonization and pyrolysis exhaust gas, a spray system needs to be set up to clean the tar attached to the electrode plate, thereby causing the cleaned tar, dust and cleaning liquid to mix together, and the tar cannot be effectively recovered.

[0005] The present invention is achieved through the following technical solutions: An electrostatic dust removal device for coal gangue decarbonization and sintering tail gas comprises a front box and a rear box, wherein the upper end of the rear side surface of the front box is provided with a strip-shaped opening connected to the rear box, the front box is provided with a first electrostatic dust removal mechanism, the rear box is provided with a second electrostatic dust removal mechanism, the lower end of the front box is provided with an air inlet pipe, and the lower end of the rear side surface of the rear box is provided with an air exhaust pipe; The first electrostatic precipitator mechanism comprises a plurality of anode plates arranged at equal intervals from left to right, and first cathode rods arranged in a row are arranged between two adjacent anode plates; The second electrostatic dust removal mechanism comprises a plurality of groups of steel belt rollers arranged at equal intervals on the left and right, and a power device for driving the steel belt rollers is arranged on the front box body, an anode steel belt is arranged between each group of the steel belt rollers, and the distance between two adjacent anode steel belts is smaller than the distance between two adjacent anode plates, and a second cathode rod arranged in a row is arranged between two adjacent anode steel belts; A scraping mechanism acting on the anode steel strip is arranged at the rear end of the rear box body, and a slag discharge mechanism is arranged at the bottom of the rear box body directly below the scraping mechanism.

[0006] As a further configuration of the above scheme, the scraping mechanism includes a plurality of rotating shafts arranged side by side, the lower ends of the rotating shafts are connected with scraping plates that act on the corresponding anode steel strips, and the rear box body is provided with a transmission assembly that simultaneously drives all rotating shafts to rotate and adjust.

[0007] As a further configuration of the above scheme, the transmission assembly includes gears arranged at the upper end of the rotating shaft, all the gears are meshed with a moving bar with a toothed surface, and the rear box is provided with a power telescopic part that pushes the moving bar to move left and right.

[0008] As a further arrangement of the above scheme, the top end of the second cathode rod is connected in parallel to the negative pole of the circuit through a conductive strip, a cross bar is arranged above the anode steel strip, the lower end of the cross bar is connected to a U-shaped block that acts on the upper end of each anode steel strip, the interior of the U-shaped block is connected to a carbon brush block that is in close contact with the anode steel strip through a spring support, and the carbon brush block is connected to the positive pole of the circuit.

[0009] As a further configuration of the above scheme, the slag discharge mechanism includes a slag discharge barrel connected to the bottom of the rear box body, and a slag outlet is provided at the end of the slag discharge barrel extending out of the side of the rear box body, a first auger blade shaft is provided in the slag discharge barrel, and a slag discharge motor is connected to the end of the first auger blade shaft.

[0010] As a further arrangement of the above scheme, the air inlet pipe is provided with a plurality of distribution tubes extending into the lower end of the inner cavity of the front box body, and each distribution tube is provided with an exhaust nozzle on both sides of the upper end thereof. The plurality of distribution tubes are arranged directly below the corresponding anode plates, and the exhaust nozzle is arranged directly below the corresponding first cathode rod.

[0011] As a further configuration of the above solution, the distance between two adjacent anode plates is set between 35-40 cm, and the distance between two adjacent anode steel strips is set between 20-25 cm.

[0012] As a further configuration of the above scheme, the air intake end of the air intake pipe is connected to an exhaust gas pretreatment device, and the exhaust gas pretreatment device includes a U-shaped tube, and the air intake end of the air intake pipe is connected to the lower end of one side of the U-shaped tube, an oil collecting hopper is provided at the bottom of one side of the U-shaped tube, an oil unloading valve is provided at the lower end of the oil collecting hopper, and a liquid cooling jacket is provided on the periphery of the U-shaped tube above the oil collecting hopper.

[0013] As a further configuration of the above scheme, a second auger blade shaft is arranged in the U-shaped tube above the oil collecting hopper, the lower end of the second auger blade shaft extends to the position where the U-shaped tube is connected to the air intake pipe, and the top end of the second auger blade shaft is connected to an auger motor.

[0014] When the electrostatic precipitator disclosed in the present invention is used for treating the tail gas of coal gangue decarbonization and burning, the tail gas first enters the bottom of the front box, then flows upward evenly and passes through the first electrostatic precipitator mechanism. The first electrostatic precipitator mechanism can form a moderate ion charge density field through a large discharge gap and a moderate voltage and current, and combined with the difference in conductivity between dust particles and tar in the tail gas, the dust particles can carry a large amount of charge and be adsorbed and captured by the anode plate, while the tar can smoothly pass through the first electrostatic precipitator mechanism and enter the rear box due to its low charge.

[0015] The exhaust gas entering the rear box has a high tar content and a low dust particle content. At the same time, since the second electrostatic precipitator can form a strong ion charge density field through a smaller discharge gap and a stronger voltage and current, the tar can also carry a large amount of charge when passing through it and is adsorbed and captured by the anode steel belt, thereby realizing the segmented adsorption and removal of dust particles and tar.

[0016] When the anode steel strip has a lot of tar adsorbed on it, which affects its discharge and capture effects, first control the transmission assembly to rotate the rotating shaft, thereby pressing the shovel plate against the anode steel strip, and then start the power device to make the steel strip roller run, so that the anode steel strip can circulate between the front and rear steel strip rollers, and during the movement, the shovel plate will shovel off all the tar adsorbed on its outer surface, and finally the slag discharge mechanism will discharge it at a fixed point to achieve tar recovery.

[0017] In addition, in order to avoid excessive tar content in the exhaust gas of coal gangue decarbonization and sintering, a large amount of tar is adsorbed by the anode plate when passing through the first electrostatic precipitator, making it difficult to clean the surface of the subsequent anode plate. The present invention also uses an exhaust gas pretreatment device to cool the high-temperature exhaust gas by heat exchange before electrostatic precipitator, and uses the characteristic of tar to liquefy when cooled to remove part of the tar, and then the electrostatic precipitator performs segmented treatment.

[0018] Compared with the prior art, the present invention has the following beneficial effects: The electrostatic dust removal device for gangue decarbonization and pyrolysis tail gas disclosed in the present invention utilizes the difference in conductivity between dust particles and tar in the tail gas, and arranges a first electrostatic dust removal mechanism and a second electrostatic dust removal mechanism in front and behind, so that when the tail gas flows through the first electrostatic dust removal mechanism and the second electrostatic dust removal mechanism, the dust particles can be removed first, and then the tar can be removed, thereby realizing segmented removal. The tar after segmented removal can be recovered separately, effectively avoiding the technical problem that tar, dust and cleaning liquid are mixed together and cannot be effectively recycled when the existing wet electrostatic dust collector treats the gangue decarbonization and pyrolysis tail gas.

[0019] The second electrostatic dust removal mechanism in the present invention adopts a circulatively movable steel belt as an anode, and a scraping mechanism is provided to scrape off a large amount of tar by mechanized operation when a large amount of tar adheres to the surface of the anode steel belt. The structural design is reasonable, and the cleaning of the tar is very simple and quick.

[0020] The present invention further provides an exhaust gas pretreatment device to treat the exhaust gas from the electrostatic precipitator, utilizing the property of tar in the exhaust gas to liquefy when cooled, so that the tar can fully contact with the low-temperature water in the liquid cooling jacket during its movement along the spiral path, thereby removing a portion of the tar in advance. At the same time, the heat of the high-temperature exhaust gas can also be effectively utilized, which has the advantages of energy saving and environmental protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0022] Figure 1 It is a schematic diagram of the three-dimensional structure from a first angle of the present invention; Figure 2 It is a schematic diagram of the three-dimensional structure from a second angle of the present invention; Figure 3 It is a schematic diagram of the internal three-dimensional structure of the present invention; Figure 4 It is a schematic diagram of the three-dimensional structure of the first electrostatic precipitator mechanism and the second electrostatic precipitator mechanism in the present invention; Figure 5 It is a schematic diagram of the three-dimensional structure of the second electrostatic dust removal mechanism inside the rear box in the present invention; Figure 6 It is a schematic diagram of the three-dimensional structure of the second electrostatic dust removal mechanism and the scraping mechanism in the present invention; Figure 7 For the present invention Figure 6 A schematic diagram of the enlarged structure at A in the middle; Figure 8 It is a schematic diagram of the three-dimensional structure inside the tail gas pretreatment device of the present invention. DETAILED DESCRIPTION

[0023] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0024] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. Figures 1 to 8 , and describes the application in detail with reference to embodiments. Example 1

[0025] Example 1 A coal gangue decarbonization sintering tail gas electrostatic dust removal device, refer to the attached Figure 1 and attached Figure 2 , including a front box body 1, a rear box body 2, an air intake pipe 3 and an air exhaust pipe 4, a first electrostatic dust removal mechanism 5 is arranged in the front box body 1, and a second electrostatic dust removal mechanism 6 is arranged in the rear box body 2. The front box body 1 is rectangular and is connected to a dust collecting hopper 7 at the bottom. The air intake pipe 3 is arranged at the lower end of the rear side of the front box body 1, and is evenly connected to a plurality of distribution pipes 8 extending into the front box body 1 along its length direction, and each distribution pipe 8 is provided with an exhaust nozzle 9 on both sides of the upper end, so that the exhaust gas in the decarbonization combustion process of the coal gangue can be uniformly discharged upward from the bottom of the front box body 1 by the plurality of distribution pipes 8, and then the exhaust gas is dusted by the first electrostatic dust removal mechanism 5 during the upward flow.

[0026] Reference Figure 3 and attached Figure 4The first electrostatic dust removal mechanism 5 includes a plurality of anode plates 501 arranged side by side. The plurality of anode plates 501 are aligned one by one and arranged directly above the corresponding distribution pipe 8, and the spacing between two adjacent anode plates 501 is set between 35-40 cm, and the top ends of all anode plates 501 are connected to the positive pole of the circuit through a conductive block 502. In the gap between two adjacent anode plates 501, a plurality of first cathode rods 503 are arranged side by side in the front-to-back direction, and the first cathode rods 503 are positioned directly above the gas outlet nozzle 9 as far as possible, so that the exhaust gas discharged from the gas outlet nozzle 9 can be charged by the discharge effect of the first cathode rods 503 in the process of moving upward. In addition, the top ends of each row of first cathode rods 503 are connected to conductive strips 504, and then the plurality of conductive strips 504 are connected in parallel to the negative pole of the circuit.

[0027] A trapezoidal air deflector 10 is connected to the front end of the rear box 2, and a connecting port 201 connected to the air deflector 10 is opened at the upper end of the rear side surface of the rear box 2, and then the front end of the air deflector 10 is connected to the rear side surface of the rear box 2 to connect it to the connecting port 201. The exhaust gas treated by the first electrostatic dust removal mechanism 5 converges to the middle under the action of the air deflector 10, and then enters the upper end of the rear box 2. One end of the exhaust pipe 4 is connected to the lower end of the rear side surface of the rear box 2, and the other end is connected to the exhaust device (such as a duct fan, an exhaust pump, etc.), so that the rear box 2 can be continuously exhausted to form an airflow moving to the lower end of the rear side.

[0028] Reference Figures 3~6 The second electrostatic dust removal mechanism 6 includes a plurality of groups of steel belt rollers 601 arranged at equal intervals on the left and right, and each group of steel belt rollers 601 is aligned front to back, and then an anode steel belt 602 is arranged between each group of steel belt rollers 601, and the distance between two adjacent anode steel belts 602 is set between 20-25cm. A power device 603 for driving the steel belt rollers 601 to rotate is arranged on the lower surface of the rear box 2, so that under the action of the power device 603, all anode steel belts 602 can circulate between each corresponding group of steel belt rollers 601. In addition, in order to prevent the anode steel belt 602 from transmitting current to the power device 603, the steel belt roller 601 is made of rubber material or covered with a rubber cortex on its outer surface, so as to play a better insulation role.

[0029] A row of second cathode rods 604 arranged at intervals in front and back are installed in the gap between two adjacent anode steel strips 602, and the top of each row of second cathode rods 604 is also connected in parallel to the negative pole of the circuit through a conductive strip. In addition, a cross bar 605 is arranged just above all anode steel strips 602, and the lower end of the cross bar 605 is connected to a U-shaped block 606 that interacts with the upper end of each anode steel strip 602, and the inside of the U-shaped block 606 is connected to a carbon brush block (not shown in the figure) that is in close contact with the anode steel strip 602 through a spring support, and the conductive effect of the carbon brush block allows the anode steel strip 602 to maintain a stable connection with the positive pole of the circuit during the movement and transportation process.

[0030] Reference Figure 6 and attached Figure 7 , a scraping mechanism 11 is arranged at the rear end of the rear box body 2, and a slag discharge mechanism 12 is arranged at the bottom of the rear box body 2 just below the scraping mechanism 11. The specific scraping mechanism 11 includes a horizontal plate 111 fixed in the rear box body 2, and a plurality of bearings are arranged side by side on the horizontal plate, and then a rotating shaft 112 is rotatably connected in each bearing, and a scraping plate 113 is connected to the lower end of the rotating shaft 112, and the side end of the scraping plate 113 interacts with the rear end of the corresponding anode steel strip 602. A gear 114 is arranged at the upper end of each rotating shaft 112, and then a moving bar 115 is arranged at the upper end of the horizontal plate 111, and a power telescopic member 116 for pushing the moving bar 115 to move left and right is arranged on the outer surface of the rear box body 2. The specific power telescopic member 116 can be an electric push rod or a cylinder, and finally a tooth surface 1151 meshing with each gear 114 is arranged on the side of the moving bar 115 facing the gear 114.

[0031] The slag discharge mechanism 12 includes a slag discharge barrel 121 connected to the bottom of the rear box body 2, and a slag outlet 122 is provided at the end of the slag discharge barrel 121 extending out from the side of the rear box body 2, a first auger blade shaft 123 is provided in the slag discharge barrel 121, and a slag discharge motor 124 connected to the first auger blade shaft 123 is provided at the other end of the slag discharge barrel 121.

[0032] When the electrostatic precipitator disclosed in the present embodiment 1 is used for the treatment of the tail gas of the gangue decarbonization and burning, the tail gas is uniformly introduced into the bottom of the front box 1 by the air inlet pipe 3 and the distribution pipe 8, and then the tail gas flows upward through the first electrostatic precipitator mechanism 5. Since the distance between the two adjacent anode plates 501 in the first electrostatic precipitator mechanism 5 is set between 35-40 cm, coupled with reasonable current control, a moderate ion charge density field can be formed, and the dust particles in the tail gas have stronger conductivity than tar, so that the dust particles can carry a large amount of charge and adhere to the surface of the anode plate 501, while the tar cannot be captured in large quantities by the anode plate 501 due to its weak charge, so that after the tail gas passes through the first electrostatic precipitator mechanism 5, most of the dust particles are adsorbed and captured, and the tar enters the second electrostatic precipitator mechanism 6 through the connecting port 201 along with the tail gas.

[0033] Since the distance between two adjacent anode steel strips 602 in the second electrostatic precipitator 6 is set between 20-25 cm, and the second cathode rod 604 has a strong discharge function, a strong ion charge density field is formed, which can make the tar also carry a large amount of charge, and then be adsorbed and removed by the anode steel strips 602 on both sides, and at the same time, some small amount of dust particles not removed by the first electrostatic precipitator 5 are also adsorbed by the anode steel strips 602. Through the segmented electrostatic precipitator of the first electrostatic precipitator 5 and the second electrostatic precipitator 6, the dust particles and tar can be adsorbed and removed respectively, and the tail gas is discharged from the exhaust pipe 4 after effective dust removal.

[0034] In addition, when a large amount of dust is attached to the anode plate 501 in the first electrostatic precipitator 5, the anode plate 501 can be struck by a knocking device (which is a prior art, and this embodiment 1 is shown as an illustration) to vibrate it, so as to quickly shake off the dust particles attached to the anode plate 501, and finally be received and discharged by the ash collecting hopper 7. When a large amount of tar is adsorbed on the surface of the anode steel belt 602 in the second electrostatic precipitator 6, the power device 603 is started to make the anode steel belt 602 move in a circle under the action of the steel belt roller 601, and before it moves, the moving bar 115 is pushed to move by the power telescopic member 116, and then the ends of all the shovel plates 113 are rotated and pressed against the outer surface of the corresponding anode steel belt 602 through the meshing transmission of the gear 114, and then the tar and a small amount of dust attached to the surface can be shoveled off by the shovel plates 113 during the movement of the anode steel belt 602, and the tar after shoveling off can be discharged in a directional manner by the slag discharge mechanism 12. Example 2

[0035] Example 2 discloses an electrostatic dust removal device for coal gangue decarbonization sintering tail gas that is further improved based on the technical solution in Example 1. The similarities between the device and Example 1 are not described again.

[0036] Reference Figure 1 , Attachment Figure 2 and attached Figure 8 In this embodiment 2, an exhaust gas pretreatment device 13 is provided at the intake end of the intake pipe 3. The exhaust gas pretreatment device 13 includes an inverted U-shaped pipe 131. The intake end of the intake pipe 3 is connected to the lower end of one side of the U-shaped pipe 131. An oil collecting hopper 132 is provided at the bottom of the U-shaped pipe 131 near one side of the intake pipe 3, and an oil unloading valve 133 is provided at the lower end of the oil collecting hopper 132.

[0037] A liquid cooling jacket 134 is disposed on the outer periphery of the U-shaped tube 131 above the oil collecting hopper 132, and a liquid outlet and a liquid inlet are disposed at the upper and lower ends of the liquid cooling jacket 134, respectively. A second auger blade shaft 135 is also disposed in the U-shaped tube 131, and the top of the second auger blade shaft 135 passes through the U-shaped tube 131, and the lower end of the second auger blade shaft 135 extends to the horizontal height connected to the air intake pipe 3, and finally an auger motor 136 is disposed at the top of the second auger blade shaft 135.

[0038] In this embodiment 2, the exhaust gas pretreatment device 13 is used to make the exhaust gas from the decarbonization and sintering of coal gangue flow along the U-tube 131 before it enters the electrostatic precipitator. When it flows to the side connected to the air inlet pipe 3, due to the presence of the second auger blade shaft 135, the original straight flow path is changed into a spiral flow path, thereby increasing the heat exchange time. In the process of its spiral downward movement, the high-temperature exhaust gas will exchange heat with the low-temperature water in the liquid cooling jacket 134. At this time, part of the tar in the exhaust gas will be cooled and liquefied and attached to the inner wall of the U-tube 131, while the dust airflow will not be affected and can enter the electrostatic precipitator through the air inlet pipe 3 normally.

[0039] When a certain amount of tar is attached to the inner wall of the U-shaped tube 131, the auger motor 136 is started to rotate the second auger blade shaft 135. Then, under the action of the second auger blade shaft 135, the tar attached to the inner wall of the U-shaped tube 131 can be pushed downward into the oil collecting bucket 132. Finally, the oil unloading valve 133 is opened to discharge it, effectively avoiding the situation when the tar content in the exhaust gas is high, resulting in a small amount of tar adhering to the surface of the anode plate 501 when passing through the first electrostatic dust removal mechanism 5, thereby causing subsequent difficulties in cleaning the anode plate 501.

[0040] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An electrostatic dust removal device for coal gangue decarbonization and sintering tail gas, characterized in that: It comprises a front box body and a rear box body, and the upper end of the rear side surface of the front box body is provided with a strip-shaped opening connected to the rear box body, the front box body is provided with a first electrostatic dust removal mechanism, the rear box body is provided with a second electrostatic dust removal mechanism, the lower end of the front box body is provided with an air intake pipe, and the lower end of the rear side surface of the rear box body is provided with an air exhaust pipe; The first electrostatic precipitator mechanism comprises a plurality of anode plates arranged at equal intervals from left to right, and first cathode rods arranged in a row are arranged between two adjacent anode plates; The second electrostatic dust removal mechanism comprises a plurality of groups of steel belt rollers arranged at equal intervals on the left and right, and a power device for driving the steel belt rollers is arranged on the front box body, an anode steel belt is arranged between each group of the steel belt rollers, and the distance between two adjacent anode steel belts is smaller than the distance between two adjacent anode plates, and a second cathode rod arranged in a row is arranged between two adjacent anode steel belts; A scraping mechanism acting on the anode steel strip is arranged at the rear end of the rear box body, and a slag discharge mechanism is arranged at the bottom of the rear box body directly below the scraping mechanism.

2. The electrostatic dust removal equipment for coal gangue decarbonization and sintering tail gas according to claim 1 is characterized in that: The scraping mechanism includes a plurality of rotating shafts rotatably arranged side by side, the lower ends of the rotating shafts are connected with scraping plates that interact with the corresponding anode steel strips, and the rear box body is provided with a transmission assembly that simultaneously drives all the rotating shafts to rotate and adjust.

3. The electrostatic dust removal equipment for coal gangue decarbonization and sintering tail gas according to claim 2 is characterized in that: The transmission assembly comprises gears arranged at the upper end of the rotating shaft, all the gears are meshed with a moving bar with a tooth surface, and the rear box body is provided with a power telescopic member for pushing the moving bar to move left and right.

4. The electrostatic dust removal equipment for coal gangue decarbonization and sintering tail gas according to claim 1 is characterized in that: The top end of the second cathode rod is connected in parallel to the negative pole of the circuit through a conductive strip, and a cross bar is arranged above the anode steel strip. The lower end of the cross bar is connected to a U-shaped block that acts on the upper end of each anode steel strip. The interior of the U-shaped block is connected to a carbon brush block that is in close contact with the anode steel strip through a spring support, and the carbon brush block is connected to the positive pole of the circuit.

5. The electrostatic dust removal equipment for coal gangue decarbonization and sintering tail gas according to claim 1 is characterized in that: The slag discharge mechanism includes a slag discharge barrel connected to the bottom of the rear box body, and a slag outlet is provided at the end of the slag discharge barrel extending out of the side of the rear box body, a first auger blade shaft is provided in the slag discharge barrel, and a slag discharge motor is connected to the end of the first auger blade shaft.

6. The electrostatic dust removal equipment for coal gangue decarbonization and sintering tail gas according to claim 1, characterized in that: The air inlet pipe is provided with a plurality of distribution tubes extending into the lower end of the inner cavity of the front box body, and each distribution tube is provided with an exhaust nozzle on the left and right sides of the upper end. The plurality of distribution tubes are arranged directly below the corresponding anode plates, and the exhaust nozzle is arranged directly below the corresponding first cathode rod.

7. The electrostatic dust removal equipment for coal gangue decarbonization and sintering tail gas according to claim 1 is characterized in that: The distance between two adjacent anode plates is set between 35-40 cm, and the distance between two adjacent anode steel strips is set between 20-25 cm.

8. The electrostatic dust removal equipment for coal gangue decarbonization and sintering tail gas according to claim 1, characterized in that: The air intake end of the air intake pipe is connected to an exhaust gas pretreatment device, which includes a U-shaped pipe. The air intake end of the air intake pipe is connected to the lower end of one side of the U-shaped pipe. An oil collecting hopper is provided at the bottom of one side of the U-shaped pipe, and an oil unloading valve is provided at the lower end of the oil collecting hopper. A liquid cooling jacket is provided on the periphery of the U-shaped pipe above the oil collecting hopper.

9. The electrostatic dust removal equipment for coal gangue decarbonization and sintering tail gas according to claim 8, characterized in that: A second auger blade shaft is arranged in the U-shaped tube above the oil collecting hopper, the lower end of the second auger blade shaft extends to the position where the U-shaped tube is connected to the air intake pipe, and the top end of the second auger blade shaft is connected to an auger motor.

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