Air treatment device and treatment method for coal-fired power plant

Abstract

The invention discloses an air treatment device for a coal-fired power plant and a treatment method thereof, which belongs to the field of waste gas treatment, and comprises a machine body, an air inlet pipe, an air outlet pipe and a drain pipe, wherein the air inlet pipe is conductively connected to one end of the machine body, the air outlet pipe is conductively connected to the other end of the machine body, and the drain pipe is arranged at the bottom of the air outlet pipe and is conductively connected to the machine body cavity wall; a partition plate is provided in the inner cavity of the machine body, and the partition plate separates the inner cavity of the machine body into two working chambers, one group of the working chambers is a dust removal working chamber, and the other group of the working chambers is a desulfurization working chamber; a connecting pipe is conductively provided on the surface of the partition plate; the novel rotating fan blade can drive the waste gas in the separation cylinder to rotate when rotating at a high speed, and the waste gas can throw out the dust particles mixed in the waste gas under the action of centrifugal force, and the electrostatic precipitator can adsorb the dust with positive and negative charges, thereby improving the adsorption effect on the dust, reducing the number of electrostatic precipitators, and reducing the size of the machine body.

Description

Technical Field

[0001] The present invention relates to the field of waste gas treatment, and more particularly to an air treatment device for a coal-fired power plant and a treatment method thereof. Background Art

[0002] When the existing air treatment equipment of coal-fired power plants treats the exhaust gas produced by coal combustion, it is necessary to simultaneously set up multiple groups of electrostatic precipitators, which not only slows down the dust adsorption speed of the exhaust gas, but also causes the size of the treatment equipment to be larger. In order to solve the above problems, this device proposes an air treatment device for coal-fired power plants and a treatment method thereof.

[0003] Through patent search, it was found that the prior art represented by publication number: CN208627551U has two electrostatic dust removal chambers, namely the first purification chamber and the second purification chamber, compared with the traditional electrostatic dust removal equipment, which can purify dust more thoroughly, and a blowing device is provided between the first purification chamber and the second purification chamber to increase the air flow rate and make the purification efficiency higher. A corresponding hydraulic telescopic cylinder is connected to the top of the dust collecting duct group. Under the action of the hydraulic telescopic cylinder, the dust collecting duct group shakes up and down to prevent dust from accumulating on the inner wall of the dust collecting duct group and causing blockage to affect the dust removal work. The scheme of improving the purification efficiency requires the simultaneous installation of multiple groups of electrostatic precipitators, which not only has a slow dust adsorption speed for the exhaust gas, but also causes the problem of larger volume of the processing equipment. Summary of the invention

[0004] 1. Technical issues to be solved

[0005] In view of the problems existing in the prior art, the purpose of the present invention is to provide an air treatment device for a coal-fired power plant and a treatment method thereof. The rotating fan blades can drive the exhaust gas in the separation cylinder to rotate when rotating at a high speed. Under the action of centrifugal force, the exhaust gas can throw out the dust particles mixed in the exhaust gas. The dust passes through the air holes on the surface of the separation cylinder. The air holes on the separation cylinder and the air holes on the surface of the electrostatic precipitator are staggered. The thrown dust particles will hit the inner wall surface of the electrostatic precipitator. The electrostatic precipitator can adsorb dust with positive and negative charges, which can improve the adsorption effect of dust, reduce the number of electrostatic precipitators, and reduce the size of the machine body.

[0006] 2. Technical solution

[0007] To solve the above problems, the present invention adopts the following technical solutions.

[0008] An air treatment device for a coal-fired power plant comprises a body, an air inlet pipe, an air outlet pipe and a drain pipe, wherein the air inlet pipe is conductively connected to one end of the body, the air outlet pipe is conductively connected to the other end of the body, and the drain pipe is arranged at the bottom of the air outlet pipe and is conductively connected to the cavity wall of the body;

[0009] The inner cavity of the machine body is provided with a partition plate, which divides the inner cavity of the machine body into two working chambers, one of which is a dust removal working chamber, and the other is a desulfurization working chamber; a connecting pipe is provided on the surface of the partition plate, and the connecting pipe is used for connecting the dust removal working chamber and the desulfurization working chamber;

[0010] A dust removal mechanism is provided in the inner cavity of the dust removal working chamber, and the dust removal mechanism includes an air collecting hood, a driving motor, a worm gear blade, a rotating blade, an electrostatic precipitator and a separation cylinder. The air collecting hood is located at the top of the inner cavity of the dust removal working chamber, and the air collecting hood is connected to the air intake pipe. The driving motor is installed at one end of the upper surface of the machine body, and the power output end of the driving motor passes through the cavity wall of the machine body and extends to the bottom of the inner cavity of the dust removal working chamber. The power output end of the driving motor is transmission-connected with a worm gear blade above the power output end, and the power output end of the driving motor is transmission-connected with the rotating blade below the power output end. The electrostatic precipitator is located in the dust removal working chamber, and the separation cylinder is located in the inner cavity of the electrostatic precipitator. The electrostatic precipitator and the separation cylinder are both cylindrical structures, and air holes are opened through the surfaces of the electrostatic precipitator and the separation cylinder.

[0011] Furthermore, a dust suction mechanism is provided at the bottom of the electrostatic precipitator, and the dust suction mechanism includes an air collecting plate, a rotating plate, a shaft seal, a gear ring, a rotating motor and a gear. The air collecting plate is located at the bottom of the electrostatic precipitator, and a rotating plate is rotatably provided on the surface of the air collecting plate. The outer wall of the rotating plate is rotatably connected to the inner wall of the air collecting plate through a shaft seal, and the shaft seal is used for sealing the connection between the air collecting plate and the rotating plate.

[0012] Furthermore, the gear ring is fixedly welded to the lower surface of the rotating disk, the rotating motor is installed in the inner cavity of the air collecting disk, and the power output end of the rotating motor is connected with a gear, and the gear is meshed with the gear ring.

[0013] Furthermore, the electrostatic precipitator is connected to the top of the separation cylinder, and the electrostatic precipitator is fixed in the inner cavity of the dust removal working chamber through a bracket, and the electrostatic precipitator does not contact the inner wall of the dust removal working chamber.

[0014] Furthermore, the dust collection mechanism also includes a vacuum cleaner and a dust box. The vacuum cleaner is installed on the outer wall surface of the body, and the suction end of the vacuum cleaner is connected to the air collecting plate through a pipe. The dust box is located on one side of the vacuum cleaner and is connected through a pipe. The dust box is used to store dust discharged by the vacuum cleaner.

[0015] Furthermore, a plurality of groups of rotating frames are equidistantly arranged on the surface of the rotating disk, and the rotating frames are in an arc-shaped structure. The rotating frames are located in the connection gap between the electrostatic precipitator and the separation cylinder.

[0016] Furthermore, a dividing groove is formed through the surface of the rotating frame, a dust suction pipe is formed on one side of the dividing groove of the rotating frame, the bottom of the dust suction pipe is conductively connected to the rotating disk, and dust suction holes are equidistantly formed through the side wall of the dust suction pipe and located in the dividing groove.

[0017] Furthermore, a mounting groove is provided on the other side of the dividing groove of the rotating frame, a scraper brush is movably inserted into the inner cavity of the mounting groove, and a plurality of groups of locking bolts for fixing the scraper brush are equidistantly threadedly connected to the side wall of the mounting groove.

[0018] Furthermore, a number of groups of limit seats are symmetrically and equidistantly provided on both sides of the inner wall of the desulfurization working chamber, a water curtain is movably inserted into the inner cavity of the limit seat, and the gas passes through the inner cavity of the water curtain, a water supply pipe is provided on the top of the water curtain, one end of the water supply pipe passes through the cavity wall of the machine body, and the end of the water supply pipe is gathered on the outer wall surface of the machine body, and the top of the dust removal working chamber and the desulfurization working chamber are movably provided with an inspection panel for easy maintenance.

[0019] An air treatment method for a coal-fired power plant comprises the following steps:

[0020] S1. Start the drive motor. The drive motor can drive the worm wheel blades and the rotating blades at the same time. The high-speed rotation of the worm wheel blades can generate centrifugal force in the inner cavity of the air collecting hood, so that the exhaust gas can be sucked into the separation cylinder in the inner cavity of the dust removal working chamber through the air inlet pipe.

[0021] S2. The rotating blades can drive the exhaust gas in the separation cylinder to rotate when rotating at high speed. Under the action of centrifugal force, the dust particles mixed in the exhaust gas can be thrown out.

[0022] S3. Dust passes through the vent holes on the surface of the separation cylinder. The vent holes on the separation cylinder and the vent holes on the surface of the electrostatic precipitator are arranged in a staggered manner. The thrown dust particles will hit the inner wall surface of the electrostatic precipitator. The electrostatic precipitator can adsorb dust with positive and negative charges.

[0023] S4. The water supply pipe injects water from the top of the water curtain. When the gas passes through the water curtain, the sulfide in the exhaust gas can be removed by water filtration.

[0024] S5. Start the rotating motor, which can drive the gear ring through the gear, so that the rotating disk can rotate. When the rotating frame rotates, the dust adsorbed on the inner wall surface of the electrostatic precipitator can be cleaned by the scraping brush.

[0025] S6. The dust swept by the scraping brush is sucked away through the dust suction hole and discharged into the dust box for storage.

[0026] 3. Beneficial effects

[0027] Compared with the prior art, the advantages of the present invention are:

[0028] (1) The rotating fan blades of the present technical solution can drive the exhaust gas in the separation cylinder to rotate when rotating at a high speed. Under the action of centrifugal force, the dust particles mixed in the exhaust gas can be thrown out. The dust passes through the air holes on the surface of the separation cylinder. The air holes on the separation cylinder and the air holes opened on the surface of the electrostatic precipitator are arranged in an alternating manner. The thrown out dust particles will collide with the inner wall surface of the electrostatic precipitator. The electrostatic precipitator can adsorb dust with positive and negative charges, which can improve the dust adsorption effect, reduce the number of electrostatic precipitators, and reduce the size of the machine body.

[0029] (2) This technical solution uses limit seats to fix the two sides of the water curtain, and the water supply pipe injects water from the top of the water curtain. When the gas passes through the water curtain, the sulfide in the exhaust gas can be removed by water filtration. The water curtain can hinder the falling speed of the water liquid and reduce the loss of water liquid during chlorination.

[0030] (3) The rotating motor of the technical solution can drive the gear ring through the gear. The rotating frame is welded to the surface of the rotating disk. When the rotating frame rotates, the dust adsorbed on the inner wall surface of the electrostatic precipitator can be cleaned by a scraper brush. A dust suction pipe is provided on the other side of the rotating frame. The bottom of the dust suction pipe is connected to the rotating disk, and the dust collector is connected to the air collecting disk through a pipeline. Therefore, the dust swept by the scraper brush can be sucked away through the dust suction hole and discharged into the dust collecting box for storage, which can improve the dust removal effect of the electrostatic precipitator and also improve the protection of the electrostatic precipitator. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0032] Figure 2 It is a schematic diagram of the cross-sectional structure of the present invention;

[0033] Figure 3 It is a schematic diagram of the dust removal mechanism structure of the present invention;

[0034] Figure 4 It is a schematic diagram of the structure of the dust collection mechanism of the present invention;

[0035] Figure 5 It is a schematic diagram of the exploded structure of the dust collection mechanism of the present invention;

[0036] Figure 6 It is a schematic diagram of the structure of the rotating frame of the present invention.

[0037] Description of the numbers in the figure:

[0038] 1. Machine body; 2. Air inlet pipe; 3. Air outlet pipe; 4. Drain pipe; 5. Partition plate; 6. Connecting pipe; 7. Air collecting hood; 71. Driving motor; 72. Worm wheel fan blade; 73. Rotating fan blade; 74. Electrostatic precipitator; 75. Partition cylinder; 8. Air collecting disk; 81. Rotating disk; 82. Shaft seal; 83. Gear ring; 84. Rotating motor; 85. Gear; 86. Vacuum cleaner; 87. Dust collecting box; 9. Rotating frame; 10. Dust suction pipe; 11. Dust suction hole; 12. Mounting slot; 13. Scraper brush; 14. Limit seat; 15. Water curtain; 16. Water supply pipe. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making creative work are within the scope of protection of the present invention.

[0040] Embodiment 1

[0041] See also Figure 1-6 , an air treatment device for a coal-fired power plant, comprising a body 1, an air inlet pipe 2, an air outlet pipe 3 and a drain pipe 4, wherein the air inlet pipe 2 is conductively connected to one end of the body 1, the air outlet pipe 3 is conductively connected to the other end of the body 1, and the drain pipe 4 is arranged at the bottom of the air outlet pipe 3 and is conductively connected to the cavity wall of the body 1;

[0042] It should be noted that the exhaust gas enters the machine body 1 through the air inlet pipe 2 , and is discharged through the exhaust pipe 3 after dust removal and dechlorination. The waste water produced during dechlorination is discharged through the drain pipe 4 .

[0043] The inner cavity of the machine body 1 is provided with a partition plate 5, and the partition plate 5 divides the inner cavity of the machine body 1 into two working chambers, one of which is a dust removal working chamber, and the other is a desulfurization working chamber; a connecting pipe 6 is provided on the surface of the partition plate 5, and the connecting pipe 6 is used for connecting the dust removal working chamber and the desulfurization working chamber;

[0044] It should be noted that the inner cavity of the body 1 is divided into a dust removal working chamber and a desulfurization working chamber by a partition plate 5. The dust in the exhaust gas is filtered through the dust removal working chamber, and the filtered gas is discharged to the desulfurization working chamber through a connecting pipe 6 for dechlorination.

[0045] A dust removal mechanism is provided in the inner cavity of the dust removal working chamber, and the dust removal mechanism includes an air collecting hood 7, a drive motor 71, a worm gear blade 72, a rotating blade 73, an electrostatic precipitator 74 and a separation cylinder 75. The air collecting hood 7 is located at the top of the inner cavity of the dust removal working chamber, and the air collecting hood 7 is conductively connected to the air inlet pipe 2. The drive motor 71 is installed at one end of the upper surface of the machine body 1, and the power output end of the drive motor 71 passes through the cavity wall of the machine body 1 and extends to the bottom of the inner cavity of the dust removal working chamber. The worm gear blade 72 is transmission-connected above the power output end of the drive motor 71, and the rotating blade 73 is transmission-connected below the power output end of the drive motor 71. The electrostatic precipitator 74 is located in the dust removal working chamber, and the separation cylinder 75 is located in the inner cavity of the electrostatic precipitator 74. The electrostatic precipitator 74 and the separation cylinder 75 are both cylindrical structures, and ventilation holes are opened on the surfaces of the electrostatic precipitator 74 and the separation cylinder 75.

[0046] It should be noted that when the drive motor 71 is started, the drive motor 71 can drive the worm wheel blades 72 and the rotating blades 73 at the same time. The worm wheel blades 72 are located in the inner cavity of the air collecting hood 7. The high-speed rotation of the worm wheel blades 72 can generate centrifugal force in the inner cavity of the air collecting hood 7, so that the exhaust gas can be sucked into the separation cylinder 75 in the inner cavity of the dust removal working chamber through the air inlet pipe 2. The electrostatic precipitator 74 is located on the outside of the separation cylinder 75. The rotating blades 73 can drive the exhaust gas in the separation cylinder 75 to rotate when rotating at a high speed. Under the action of centrifugal force, the dust particles mixed in the exhaust gas can be thrown out, and the dust passes through the air vents on the surface of the separation cylinder 75. The air vents on the separation cylinder 75 and the air vents on the surface of the electrostatic precipitator 74 are staggered. The thrown dust particles will collide with the inner wall surface of the electrostatic precipitator 74. The electrostatic precipitator 74 can adsorb dust with positive and negative charges to achieve dust treatment in the exhaust gas.

[0047] Embodiment 2

[0048] See also Figure 2 , Figure 3 and Figure 4 The bottom of the electrostatic precipitator 74 is provided with a dust collecting mechanism, which includes an air collecting plate 8, a rotating plate 81, a shaft seal 82, a gear ring 83, a rotating motor 84 and a gear 85. The air collecting plate 8 is located at the bottom of the electrostatic precipitator 74. The surface of the air collecting plate 8 is provided with a rotating plate 81 for rotation. The outer wall of the rotating plate 81 is rotatably connected to the inner wall of the air collecting plate 8 through the shaft seal 82. The shaft seal 82 is used for sealing the connection between the air collecting plate 8 and the rotating plate 81.

[0049] It should be noted that when the gas collecting disk 8 rotates, the connection between the gas collecting disk 8 and the rotating disk 81 is sealed by a shaft seal 82, which can reduce the escape of dust.

[0050] The gear ring 83 is fixedly welded to the lower surface of the rotating disk 81, the rotating motor 84 is installed in the inner cavity of the gas collecting disk 8, and the power output end of the rotating motor 84 is connected to a gear 85, and the gear 85 is meshed and connected with the gear ring 83;

[0051] It should be noted that the rotary motor 84 drives the ring gear 83 via the gear 85 , so that the rotary disk 81 can rotate relative to the air collecting disk 8 .

[0052] Embodiment 3

[0053] See also Figure 2 The electrostatic precipitator 74 is connected to the top of the separation cylinder 75, and the electrostatic precipitator 74 is fixed in the inner cavity of the dust removal working chamber by a bracket, and the electrostatic precipitator 74 does not contact the inner wall of the dust removal working chamber;

[0054] It should be noted that the gap formed between the electrostatic precipitator 74 and the inner wall of the dust removal working chamber is used to store the filtered gas.

[0055] Embodiment 4

[0056] See also Figure 1 , Figure 5 and Figure 6 The dust collection mechanism also includes a dust collector 86 and a dust box 87. The dust collector 86 is installed on the outer wall surface of the machine body 1, and the suction end of the dust collector 86 is connected to the air collecting plate 8 through a pipeline. The dust box 87 is located on one side of the dust collector 86 and is connected through a pipeline. The dust box 87 is used to store dust discharged by the dust collector 86. The surface of the rotating disk 81 is equidistantly provided with a plurality of rotating racks 9. The rotating racks 9 are in an arc-shaped structure. The rotating racks 9 are located at the connection between the electrostatic precipitator 74 and the separation cylinder 75. In the joint gap, a dividing groove is opened through the surface of the rotating frame 9, and a dust suction pipe 10 is formed on one side of the dividing groove of the rotating frame 9. The bottom of the dust suction pipe 10 is connected to the rotating disk 81, and dust suction holes 11 are opened evenly through the side wall of the dust suction pipe 10 and are located in the dividing groove. An installation groove 12 is opened on the other side of the dividing groove of the rotating frame 9, and a scraper brush 13 is movably inserted into the inner cavity of the installation groove 12. The side wall of the installation groove 12 is equidistantly threaded with a plurality of groups of locking bolts for fixing the scraper brush 13.

[0057] It should be noted that when the rotating motor 84 is started, the rotating motor 84 can drive the ring gear 83 through the gear 85, so that the rotating disk 81 can rotate. The rotating connection between the outer wall of the rotating disk 81 and the air collecting disk 8 is sealed by the shaft seal 82. The rotating frame 9 is welded to the surface of the rotating disk 81, and the rotating frame 9 is inserted between the electrostatic precipitator 74 and the separation cylinder 75. A scraper 13 is installed on one side of the rotating frame 9 through the mounting groove 12, and the scraper 13 is fixed by a locking bolt. When the rotating frame 9 rotates, the dust adsorbed on the inner wall surface of the electrostatic precipitator 74 can be cleaned by the scraper 13. At the same time, a dust suction pipe 10 is provided on the other side of the rotating frame 9. The bottom of the dust suction pipe 10 is conductively connected to the rotating disk 81, and the dust collector 86 is connected to the air collecting disk 8 through a pipeline, so that the dust cleaned by the scraper 13 can be sucked away through the dust suction hole 11 and discharged into the dust collecting box 87 for storage, which can improve the dust removal effect of the electrostatic precipitator 74 and also improve the protection of the electrostatic precipitator 74.

[0058] Embodiment 5

[0059] See also Figure 2 and Figure 3 A plurality of limit seats 14 are symmetrically and equidistantly arranged on both sides of the inner wall of the desulfurization working chamber, a water curtain 15 is movably inserted into the inner cavity of the limit seat 14, and the gas passes through the inner cavity of the water curtain 15, a water supply pipe 16 is arranged on the top of the water curtain 15, one end of the water supply pipe 16 passes through the cavity wall of the machine body 1, and the end of the water supply pipe 16 is gathered on the outer wall surface of the machine body 1, and the top of the dust removal working chamber and the desulfurization working chamber are movably provided with an inspection panel for convenient maintenance.

[0060] It should be noted that the water curtain 15 is fixed by the limit seats 14 on both sides, and the water supply pipe 16 injects water from the top of the water curtain 15. When the gas passes through the water curtain 15, the sulfide in the exhaust gas can be removed by water filtration. The water curtain 15 can hinder the falling speed of the water liquid and reduce the loss of water liquid during dechlorination.

[0061] An air treatment method for a coal-fired power plant comprises the following steps:

[0062] S1. Align the air inlet pipe 2 with the exhaust gas discharge device, start the drive motor 71, and the drive motor 71 can drive the worm wheel blades 72 and the rotating blades 73 at the same time. The worm wheel blades 72 are located in the inner cavity of the air collecting hood 7. The high-speed rotation of the worm wheel blades 72 can generate centrifugal force in the inner cavity of the air collecting hood 7, so that the exhaust gas can be sucked into the separation cylinder 75 in the inner cavity of the dust removal working chamber through the air inlet pipe 2.

[0063] S2. The electrostatic precipitator 74 is located outside the separation cylinder 75. The rotating blades 73 can drive the exhaust gas in the separation cylinder 75 to rotate when rotating at a high speed. Under the action of centrifugal force, the dust particles mixed in the exhaust gas can be thrown out.

[0064] S3. Dust passes through the vent holes on the surface of the separation cylinder 75. The vent holes on the separation cylinder 75 and the vent holes on the surface of the electrostatic precipitator 74 are arranged in a staggered manner. The ejected dust particles will collide with the inner wall surface of the electrostatic precipitator 74. The electrostatic precipitator 74 can adsorb dust with positive and negative charges to achieve dust treatment in the exhaust gas.

[0065] S4. The treated gas is discharged from the vent holes on the surface of the electrostatic precipitator 74 into the inner cavity of the dust removal working chamber, and then discharged into the desulfurization working chamber by the connecting pipe 6. It is fixed by the limit seats 14 on both sides of the water curtain 15, and the water supply pipe 16 injects water from the top of the water curtain 15. When the gas passes through the water curtain 15, the sulfide in the exhaust gas can be removed by water filtration. The water curtain 15 can hinder the falling speed of the water liquid, and reduce the loss of water liquid during dechlorination. The water liquid that falls to the bottom of the desulfurization working chamber can be discharged through the drain pipe 4.

[0066] S5. Start the rotating motor 84. The rotating motor 84 can drive the gear ring 83 through the gear 85, so that the rotating disk 81 can rotate. The rotating connection between the outer wall of the rotating disk 81 and the air collecting disk 8 is sealed by the shaft seal 82. The rotating frame 9 is welded to the surface of the rotating disk 81, and the rotating frame 9 is inserted between the electrostatic precipitator 74 and the separation cylinder 75. A scraper brush 13 is installed on one side of the rotating frame 9 through the mounting groove 12. The scraper brush 13 is fixed by a locking bolt. When the rotating frame 9 rotates, the scraper brush 13 can clean the dust adsorbed on the inner wall surface of the electrostatic precipitator 74.

[0067] S6. A dust suction pipe 10 is provided on the other side of the rotating frame 9. The bottom of the dust suction pipe 10 is connected to the rotating disk 81, and the dust collector 86 is connected to the air collecting disk 8 through a pipeline, so that the dust swept by the scraping brush 13 can be sucked away through the dust suction hole 11 and discharged into the dust collecting box 87 for storage, which can improve the dust removal effect of the electrostatic precipitator 74 and also improve the protection of the electrostatic precipitator 74.

[0068] The above is only a preferred specific implementation of the present invention; however, the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and its improved conception within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An air treatment device for a coal-fired power plant, characterized in that: It comprises a machine body (1), an air inlet pipe (2), an air outlet pipe (3) and a drainage pipe (4), wherein the air inlet pipe (2) is conductively connected to one end of the machine body (1), the air outlet pipe (3) is conductively connected to the other end of the machine body (1), and the drainage pipe (4) is arranged at the bottom of the air outlet pipe (3) and is conductively connected to the cavity wall of the machine body (1); The inner cavity of the machine body (1) is provided with a partition plate (5), and the partition plate (5) divides the inner cavity of the machine body (1) into two working chambers, one of which is a dust removal working chamber, and the other is a desulfurization working chamber; a connecting pipe (6) is provided on the surface of the partition plate (5), and the connecting pipe (6) is used for connecting the dust removal working chamber and the desulfurization working chamber; The dust removal working chamber is provided with a dust removal mechanism, the dust removal mechanism comprising an air collecting hood (7), a drive motor (71), turbine blades (72), rotary blades (73), an electrostatic precipitator (74) and a separation cylinder (75); the air collecting hood (7) is located at the top of the dust removal working chamber, and the air collecting hood (7) is conductively connected to the air inlet pipe (2); the drive motor (71) is mounted on one end of the upper surface of the machine body (1), and the power output end of the drive motor (71) penetrates the cavity wall of the machine body (1) and extends to the bottom of the dust removal working chamber. The power output end of the drive motor (71) is transmission-connected to a turbine blade (72) above, and the power output end of the drive motor (71) is transmission-connected to a rotating blade (73) below. The electrostatic precipitator (74) is located in a dust removal working chamber, and the separation cylinder (75) is located in an inner chamber of the electrostatic precipitator (74). The electrostatic precipitator (74) and the separation cylinder (75) are both cylindrical structures. Ventilation holes are provided through the surfaces of the electrostatic precipitator (74) and the separation cylinder (75), and the venting holes are arranged in a staggered manner.

2. The air treatment device for a coal-fired power plant according to claim 1, characterized in that: A dust collecting mechanism is provided at the bottom of the electrostatic precipitator (74), the dust collecting mechanism comprising an air collecting plate (8), a rotating plate (81), a shaft seal (82), a gear ring (83), a rotating motor (84) and a gear (85); the air collecting plate (8) is located at the bottom of the electrostatic precipitator (74); a rotating plate (81) is rotatably provided on the surface of the air collecting plate (8); the outer wall of the rotating plate (81) is rotatably connected to the inner wall of the air collecting plate (8) via the shaft seal (82); the shaft seal (82) is used for sealing the connection between the air collecting plate (8) and the rotating plate (81).

3. The air treatment device for a coal-fired power plant according to claim 2, characterized in that: The gear ring (83) is fixedly welded to the lower surface of the rotating disk (81), the rotating motor (84) is installed in the inner cavity of the air collecting disk (8), and the power output end of the rotating motor (84) is connected to a gear (85), and the gear (85) is meshed and connected with the gear ring (83).

4. The air treatment device for a coal-fired power plant according to claim 1, characterized in that: The electrostatic precipitator (74) is connected to the top of the separation cylinder (75), and the electrostatic precipitator (74) is fixed to the inner cavity of the dust removal working chamber by a bracket, and the electrostatic precipitator (74) does not contact the inner wall of the dust removal working chamber.

5. The air treatment device for a coal-fired power plant according to claim 2, characterized in that: The dust collection mechanism further comprises a dust collector (86) and a dust collection box (87); the dust collector (86) is mounted on the outer wall surface of the machine body (1), and the air suction end of the dust collector (86) is connected to the air collection plate (8) via a pipeline; the dust collection box (87) is located on one side of the dust collector (86) and is connected via a pipeline; the dust collection box (87) is used for storing dust discharged by the dust collector (86).

6. The air treatment device for a coal-fired power plant according to claim 3, characterized in that: A plurality of groups of rotating frames (9) are equidistantly arranged on the surface of the rotating disk (81); the rotating frames (9) are arc-shaped structures; and the rotating frames (9) are located in the connection gap between the electrostatic precipitator (74) and the separation cylinder (75).

7. The air treatment device for a coal-fired power plant according to claim 6, characterized in that: A dividing groove is formed through the surface of the rotating frame (9), a dust suction pipe (10) is formed on one side of the dividing groove of the rotating frame (9), the bottom of the dust suction pipe (10) is connected to the rotating disk (81), and dust suction holes (11) are formed through the side wall of the dust suction pipe (10) and are located in the dividing groove at equal intervals.

8. The air treatment device for a coal-fired power plant according to claim 7, characterized in that: A mounting groove (12) is provided on the other side of the dividing groove of the rotating frame (9), a scraper brush (13) is movably inserted into the inner cavity of the mounting groove (12), and a plurality of groups of locking bolts for fixing the scraper brush (13) are equidistantly threadedly connected to the side wall of the mounting groove (12).

9. The air treatment device for a coal-fired power plant according to claim 1, characterized in that: A plurality of groups of limit seats (14) are symmetrically and equidistantly arranged on both sides of the inner wall of the desulfurization working chamber, a water curtain (15) is movably inserted into the inner cavity of the limit seat (14), and gas passes through the inner cavity of the water curtain (15), a water supply pipe (16) is arranged on the top of the water curtain (15), one end of the water supply pipe (16) passes through the cavity wall of the machine body (1), and the end of the water supply pipe (16) is gathered on the outer wall surface of the machine body (1), and an inspection panel for convenient maintenance is movably arranged on the top of the dust removal working chamber and the desulfurization working chamber.

10. An air treatment method for a coal-fired power plant, characterized in that: The method is applied to an air treatment device for a coal-fired power plant according to any one of claims 1 to 9, and the method comprises the following steps: S1, starting the drive motor (71), the drive motor (71) can drive the turbine blades (72) and the rotating blades (73) at the same time, the turbine blades (72) can rotate at a high speed to generate centrifugal force in the inner cavity of the air collecting hood (7), so that the exhaust gas can be sucked into the separation cylinder (75) in the inner cavity of the dust removal working chamber through the air inlet pipe (2); S2. The rotating blades (73) can drive the exhaust gas in the separation cylinder (75) to rotate when rotating at a high speed. Under the action of centrifugal force, the dust particles contained in the exhaust gas can be thrown out; S3, the dust passes through the vent holes on the surface of the separation cylinder (75), the vent holes on the separation cylinder (75) and the vent holes on the surface of the electrostatic precipitator (74) are arranged in a staggered manner, and the dust particles thrown out will collide with the inner wall surface of the electrostatic precipitator (74), and the electrostatic precipitator (74) can adsorb the dust with positive and negative charges; S4, the water supply pipe (16) injects water from the top of the water curtain (15), and when the gas passes through the water curtain (15), the sulfide in the exhaust gas can be removed by water filtration; A plurality of groups of limit seats (14) are symmetrically and equidistantly arranged on both sides of the inner wall of the desulfurization working chamber, a water curtain (15) is movably inserted into the inner cavity of the limit seat (14), and gas passes through the inner cavity of the water curtain (15), a water supply pipe (16) is arranged on the top of the water curtain (15), one end of the water supply pipe (16) passes through the cavity wall of the machine body (1), and the end of the water supply pipe (16) is gathered on the outer wall surface of the machine body (1); S5, starting the rotating motor (84), the rotating motor (84) can drive the gear ring (83) through the gear (85), so that the rotating disk (81) can rotate, and the rotating frame (9) can clean the dust adsorbed on the inner wall surface of the electrostatic precipitator (74) through the scraping brush (13) when rotating; A rotating disk (81) is rotatably provided on the surface of the gas collecting disk (8), and the outer wall of the rotating disk (81) is rotatably connected to the inner wall of the gas collecting disk (8) via a shaft seal (82), and the shaft seal (82) is used to seal the connection between the gas collecting disk (8) and the rotating disk (81); the gear ring (83) is fixedly welded to the lower surface of the rotating disk (81), the rotating motor (84) is installed in the inner cavity of the gas collecting disk (8), and the power output end of the rotating motor (84) is connected to a gear (85), and the gear (85) is meshed and connected with the gear ring (83); S6, the dust removed by the scraping brush (13) is sucked away through the dust suction hole (11) and discharged into the dust collecting box (87) for storage; A separation groove is formed through the surface of the rotating frame (9), a dust suction pipe (10) is formed on one side of the separation groove of the rotating frame (9), the bottom of the dust suction pipe (10) is connected to the rotating disk (81), and dust suction holes (11) are formed through the side wall of the dust suction pipe (10) and are located in the separation groove at equal intervals; The dust collector (86) is mounted on the outer wall surface of the machine body (1), and the air suction end of the dust collector (86) is connected to the air collecting plate (8) via a pipeline. The dust collecting box (87) is located on one side of the dust collector (86) and is connected via a pipeline.

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