A waste gas treatment device for a thermal power plant and a treatment method thereof

Abstract

The application discloses a waste gas treatment device of a thermal power plant and a treatment method thereof, and relates to the technical field of environmental protection engineering construction, which comprises a treatment box, a dispersed air inlet mechanism arranged at the bottom of the treatment box, and a semicircular dispersion frame. The waste gas treatment device of the thermal power plant and the treatment method thereof have the advantages that when the filter plate is cleaned, the filter plate is deflected to the lowermost position, the filter plate is located between the impact air pipe and the brush piece, the impact air pipe impacts the back surface of the filter plate, the brush piece brushes the filter surface of the filter plate, the collecting pump absorbs the filter surface of the filter plate through the collecting hole, the cross flow cleaning is realized, the cleaning effect of the filter surface of the filter plate is improved, the small-particle impurities clogging the filter holes of the filter plate can be removed through the cross flow impact treatment, and thus the filter plate can work efficiently for a long time without the accumulation of impurities and the effect of clogging.

Description

Technical Field

[0001] This invention relates to the field of environmental engineering construction technology, and in particular to a waste gas treatment device and treatment method for thermal power plants. Background Technology

[0002] During the daily operation of thermal power plants, the amount of waste gas generated is enormous. In order to avoid environmental pollution caused by the discharge of this waste gas, it is necessary to treat it through waste gas treatment devices at the discharge end.

[0003] Existing waste gas treatment devices first filter the waste gas to remove particulate impurities. During operation, particulate impurities adhere to the filter plate, obstructing gas flow. At the same time, some small particles can easily clog the filter holes, causing some to become ineffective. As a result, the filtration efficiency and effect gradually decrease with increasing treatment time, reducing the value of the waste gas treatment device. Summary of the Invention

[0004] This invention discloses a waste gas treatment device for thermal power plants, aiming to solve the technical problem that existing waste gas treatment devices first filter the waste gas to remove particulate impurities. However, during the operation of the filter plate, particulate impurities adhere to the filter plate, causing poor gas flow. At the same time, some small particulate impurities easily clog the filter holes on the filter plate, causing some filter holes to lose their function. As a result, the filtration efficiency and filtration effect gradually decrease with the increase of treatment time.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A waste gas treatment device for a thermal power plant, comprising:

[0007] Processing box;

[0008] A dispersion air intake mechanism is located at the bottom of the processing box. The dispersion air intake mechanism includes a semi-circular dispersion frame, and two mounting bases are fixedly connected to the bottom of the semi-circular dispersion frame. Both mounting bases are fixedly connected to the bottom inner wall of the processing box.

[0009] Two side support plates are set on both sides of the semi-circular dispersion frame;

[0010] The convection treatment mechanism is mounted on the side support plate;

[0011] The middle plate is located on the inner walls of both sides of the processing box, and filter plates are connected to both sides of it by hinges;

[0012] The hanging plate is fixedly connected to the bottom of the middle plate, and hydraulic cylinders are fixedly connected at equal distances on both sides. The output ends of multiple hydraulic cylinders on one side are fixedly connected to the same limiting plate, and the top of the limiting plate is in contact with the bottom of the filter plate.

[0013] The air guide frame is located in the air guide hole opened on the top of the processing box.

[0014] In a preferred embodiment, the convection processing mechanism includes:

[0015] Two motor shaft brackets are symmetrically distributed on the top of the side support plate. A drive motor is fixedly connected to one side of one of the motor shaft brackets. The output shaft of the drive motor is fixedly connected to a rotating shaft through a coupling. The rotating shaft has a hollow structure, and one end of the rotating shaft is connected to one side of the other motor shaft bracket through a bearing.

[0016] The connecting bend is connected to the mounting hole on the motor shaft bracket via a bearing, and it is connected to the rotating shaft.

[0017] Two lifting cylinders are fixedly connected to the bottom of the side support plate located below the motor shaft frame, and the output end of the lifting cylinder is fixedly connected to the bottom of the motor shaft frame.

[0018] In a preferred embodiment, the convection processing mechanism further includes:

[0019] The mounting sleeve is located on one side of the motor shaft bracket, and the connecting bend is fixedly connected to the inside of the mounting sleeve.

[0020] The collection box is located on the side support plate near the top of the connecting bend;

[0021] A collection pump is installed on one side of the collection box. The collection end of the collection pump is fixedly connected to a telescopic air pipe. One end of the telescopic air pipe is inserted into the inside of the connecting bend. The delivery end of the collection pump is connected to the inside of the collection box through a pipe.

[0022] In a preferred embodiment, brush blades are arranged in a ring on the outer side wall of the rotating shaft, and collection holes are equally spaced on the outer side wall of the rotating shaft between each group of brush blades.

[0023] In a preferred embodiment, a lifting plate is fixedly connected to the top of the side support plate away from the rotation axis, and a limiting rail is fixedly connected to the top of the lifting plate. An adjusting slide is slidably connected inside the limiting rail, and an impact air pipe is fixedly connected to the upward-facing arc surface of the adjusting slide. An impact hole is opened on the impact air pipe.

[0024] In a preferred embodiment, mounting plates are fixedly connected to the top of both ends of the side support plate at the limiting rail. A reversible motor is fixedly connected to one side of one of the mounting plates. The output shaft of the reversible motor is fixedly connected to an adjusting shaft via a coupling. An adjusting slide is fixedly connected to the outer wall of the adjusting shaft. One end of the adjusting shaft is connected to one side of the other mounting plate via a bearing. An air compressor is fixedly connected to one side of the lifting plate. The air compressor's air delivery end is connected to the inside of the impact air pipe via a pipeline.

[0025] In a preferred embodiment, the dispersed air intake mechanism further includes:

[0026] The built-in air intake frame is located inside the semi-circular dispersion frame at its center point.

[0027] The second forward and reverse motor is located on the outer wall of one side of the semi-circular dispersion frame at the center point. The output shaft of the second forward and reverse motor is fixedly connected to a hollow rotating shaft through a coupling. The hollow rotating shaft is located at the center of the built-in air intake frame.

[0028] In a preferred embodiment, the outer wall of the hollow rotating shaft has a connecting hole, and a directional air guide pipe is fixedly connected inside the connecting hole. The outer wall of the built-in air intake frame has air intake holes at equal intervals, and the outer wall of the semi-circular dispersion frame has dispersion holes at equal intervals.

[0029] In a preferred embodiment, the hollow rotating shaft has a shaft hole on the side away from the second reversible motor, and a connecting pipe is connected inside the shaft hole via a bearing. One end of the connecting pipe is inserted into a long gas supply pipe, and a valve is connected to the outer wall of the long gas supply pipe away from the semi-circular dispersion frame via a flange.

[0030] A method for treating exhaust gas from a thermal power plant, using an exhaust gas treatment device for a thermal power plant as described above, includes the following steps:

[0031] Step 1: During exhaust gas treatment, the exhaust gas enters the hollow rotating shaft through the long gas delivery pipe. The forward and reverse motor 2 is started to drive the hollow rotating shaft to rotate, which in turn drives the guide pipe to rotate back and forth. The exhaust gas is evenly introduced into the semi-circular dispersion frame through each air inlet, and then enters the treatment box through each dispersion air hole. The filter plate filters it, and the treated exhaust gas is discharged through the guide frame.

[0032] Step 2: After the filter plate has been used for a period of time, adjust the hydraulic cylinder to separate the limiting plate from the filter plate. Then, under the action of gravity, the filter plate will gradually deflect downwards to the space between the impact air pipe and the brush plate.

[0033] Step 3: Start the air compressor and start the forward and reverse motor 1. The forward and reverse motor 1 drives the impact air pipe to deflect from bottom to top, thereby realizing all-round impact on the back of the filter plate. Then, adjust the lifting cylinder to drive the motor shaft to rise, start the drive motor, and drive the brush to rotate and clean the filter surface of the filter plate. Start the collection pump to collect the impurities brushed off.

[0034] As can be seen from the above, the exhaust gas treatment device for thermal power plants provided by the present invention has the following characteristics: when cleaning the filter plate, it is deflected to the bottom, so that it is located between the impact air pipe and the brush plate. The impact air pipe impacts the back of the filter plate with gas, the brush plate scrubs the filter surface of the filter plate, and the collection pump adsorbs the filter surface of the filter plate through the collection hole, thereby realizing convection cleaning and improving the cleaning effect of the filter surface. At the same time, the convection impact treatment can quickly remove small particulate impurities that clog the filter holes on the filter plate, thereby enabling the filter plate to work efficiently for a long time without the accumulation and clogging of impurities. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the overall structure of a waste gas treatment device for a thermal power plant proposed in this invention.

[0036] Figure 2 This is a cross-sectional view of the treatment box structure of a waste gas treatment device for a thermal power plant proposed in this invention.

[0037] Figure 3 for Figure 2 The overall structural main view.

[0038] Figure 4 This is a schematic diagram of the combined structure of the convection treatment mechanism and the decentralized air intake mechanism of a waste gas treatment device for a thermal power plant proposed in this invention.

[0039] Figure 5 for Figure 4 Enlarged view of the structure of part A in the middle.

[0040] Figure 6 This is an enlarged view of the combined structure of the impact gas pipe and the limiting rail of the exhaust gas treatment device for a thermal power plant proposed in this invention.

[0041] Figure 7 This is a schematic diagram of the decentralized air intake mechanism of a waste gas treatment device for a thermal power plant proposed in this invention.

[0042] Figure 8 for Figure 7 Cross-sectional view of the semi-circular dispersion frame and the built-in air intake frame structure.

[0043] In the diagram: 1. Processing box; 2. Air guide frame; 3. Filter plate; 4. Intermediate plate; 5. Convection processing mechanism; 501. Drive motor; 502. Motor shaft bracket; 503. Collection box; 504. Lifting cylinder; 505. Collection pump; 506. Impact air pipe; 507. Rotating shaft; 508. Mounting sleeve; 509. Connecting bend; 510. Brush; 511. Telescopic air pipe; 512. Collection hole; 513. Impact hole; 514. Lifting plate; 515. Limiting rail; 516. Adjusting shaft. 517. Reverse motor 1; 518. Mounting plate; 519. Adjustable slide; 520. Air compressor; 6. Side support plate; 7. Dispersing air intake mechanism; 701. Semi-circular dispersing frame; 702. Dispersing air hole; 703. Long air delivery pipe; 704. Pipe valve; 705. Mounting base; 706. Reverse motor 2; 707. Hollow rotating shaft; 708. Connecting pipe; 709. Directional air guide pipe; 710. Air inlet; 711. Built-in air inlet frame; 8. Limiting plate; 9. Hanging plate; 10. Hydraulic cylinder. Detailed Implementation

[0044] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0045] The exhaust gas treatment device for thermal power plants disclosed in this invention is mainly applied to existing exhaust gas treatment devices. When treating exhaust gas, the device first filters it to remove particulate impurities. During the operation of the filter plate, particulate impurities adhere to the filter plate, causing poor gas flow. At the same time, some small particulate impurities can easily clog the filter holes on the filter plate, causing some filter holes to lose their function. As a result, the filtration efficiency and filtration effect gradually decrease with the increase of treatment time.

[0046] Reference Figures 1-8 A waste gas treatment device for a thermal power plant, comprising:

[0047] Processing box 1;

[0048] The dispersion air intake mechanism 7 is located at the bottom of the processing box 1. The dispersion air intake mechanism 7 includes a semi-circular dispersion frame 701, and two mounting bases 705 are fixedly connected to the bottom of the semi-circular dispersion frame 701. Both mounting bases 705 are fixedly connected to the bottom inner wall of the processing box 1.

[0049] Two side support plates 6 are set on both sides of the semi-circular dispersion frame 701;

[0050] The convection treatment mechanism 5 is mounted on the side support plate 6;

[0051] The intermediate plate 4 is set on the inner walls of both sides of the processing box 1, and the filter plates 3 are connected to both sides of the plate by hinges.

[0052] The hanging plate 9 is fixedly connected to the bottom of the middle plate 4, and hydraulic cylinders 10 are fixedly connected at equal distances on both sides of it. The output ends of multiple hydraulic cylinders 10 located on one side are fixedly connected to the same limiting plate 8, and the top of the limiting plate 8 is in contact with the bottom of the filter plate 3.

[0053] The air guide frame 2 is set in the air guide hole opened on the top of the processing box 1.

[0054] Reference Figures 1-6 In a preferred embodiment, the convection processing mechanism 5 includes:

[0055] Two motor shaft brackets 502 are symmetrically distributed on the top of the side support plate 6. One side of one motor shaft bracket 502 is fixedly connected to a drive motor 501. The output shaft of the drive motor 501 is fixedly connected to a rotating shaft 507 through a coupling. The rotating shaft 507 has a hollow structure. One end of the rotating shaft 507 is connected to one side of the other motor shaft bracket 502 through a bearing.

[0056] The connecting bend 509 is connected to the mounting hole on the motor shaft bracket 502 via a bearing, and is connected to the rotating shaft 507.

[0057] Two lifting cylinders 504 are fixedly connected to the bottom of the side support plate 6 located below the motor shaft frame 502, and the output end of the lifting cylinder 504 is fixedly connected to the bottom of the motor shaft frame 502.

[0058] In specific application scenarios, when cleaning the filter plate 3, it is deflected to the bottom, so that it is located between the impact air pipe 506 and the brush plate 510. The impact air pipe 506 impacts the back of the filter plate 3 with gas, and the brush plate 510 brushes the filter surface of the filter plate 3. The collection pump 505 adsorbs the filter surface of the filter plate 3 through the collection hole 512, thereby achieving convection cleaning and improving the cleaning effect of the filter surface of the filter plate 3. At the same time, the convection impact treatment can quickly remove small particulate impurities that clog the filter holes on the filter plate 3, so that the filter plate 3 can work efficiently for a long time without the accumulation and clogging of impurities, thus improving the use value of the waste gas treatment device.

[0059] Specifically, after the filter plate 3 is positioned between the impact air pipe 506 and the brush plate 510, the air compressor 520 is started, and the forward and reverse motor 517 is started. The forward and reverse motor 517 drives the impact air pipe 506 to deflect from bottom to top, thereby achieving all-round impact on the reverse side of the filter plate 3. Then, the lifting cylinder 504 is adjusted to drive the motor shaft 502 to rise, and the drive motor 501 is started. The drive motor 501 drives the brush plate 510 to rotate and clean the filter surface of the filter plate 3. The collection pump 505 is started, and the collection pump 505 collects the impurities brushed off. At the same time, the collection pump 505 cooperates with the air compressor 520 to push out and collect the impurities blocked in the filter holes on the filter plate 3.

[0060] It should be noted that during the processing of filter plate 3, both sides are being processed, with the reverse side being cleaned simultaneously with the filter surface, thus improving the cleaning effect.

[0061] Reference Figures 4-6 In a preferred embodiment, the convection processing mechanism 5 further includes:

[0062] Mounting sleeve 508 is located on one side of motor shaft bracket 502, and connecting elbow 509 is fixedly connected to the inside of mounting sleeve 508;

[0063] Collection box 503 is located on the top of the side support plate 6 near the connecting bend 509;

[0064] A collection pump 505 is located on one side of a collection box 503. A telescopic air pipe 511 is fixedly connected to the collection end of the collection pump 505. One end of the telescopic air pipe 511 is inserted into the inside of a connecting bend 509. The delivery end of the collection pump 505 is connected to the inside of the collection box 503 through a pipe.

[0065] Reference Figure 5 In a preferred embodiment, brush blades 510 are distributed in a ring on the outer side wall of the rotating shaft 507, and collection holes 512 are equally spaced on the outer side wall of the rotating shaft 507 between each group of brush blades 510.

[0066] Reference Figure 5 and Figure 6 In a preferred embodiment, a lifting plate 514 is fixedly connected to the top of the side support plate 6 away from the rotation axis 507, and a limiting rail 515 is fixedly connected to the top of the lifting plate 514. An adjusting slide 519 is slidably connected inside the limiting rail 515. An impact air pipe 506 is fixedly connected to the upward-facing arc surface of the adjusting slide 519, and an impact hole 513 is opened on the impact air pipe 506.

[0067] Reference Figure 6In a preferred embodiment, the side support plate 6 is fixedly connected to the top of the two ends of the limiting rail 515 with mounting plates 518, and a forward and reverse motor 517 is fixedly connected to one side of one of the mounting plates 518. The output shaft of the forward and reverse motor 517 is fixedly connected to the adjusting shaft 516 through a coupling. The adjusting slide 519 is fixedly connected to the outer wall of the adjusting shaft 516. One end of the adjusting shaft 516 is connected to one side of the other mounting plate 518 through a bearing. An air compressor 520 is fixedly connected to one side of the lifting plate 514. The air supply end of the air compressor 520 is connected to the inside of the impact air pipe 506 through a pipe.

[0068] Reference Figure 2 , Figure 7 and Figure 8 In a preferred embodiment, the dispersed air intake mechanism 7 further includes:

[0069] The built-in air intake frame 711 is located inside the semi-circular dispersion frame 701 at its center point;

[0070] The second forward and reverse motor 706 is located on the outer wall of one side of the semi-circular dispersion frame 701 at the center point. The output shaft of the second forward and reverse motor 706 is fixedly connected to a hollow rotating shaft 707 via a coupling. The hollow rotating shaft 707 is located at the center of the built-in air intake frame 711.

[0071] Specifically, during the introduction of exhaust gas, the exhaust gas enters the hollow rotating shaft 707 through the long gas delivery pipe 703. The forward and reverse motor 706 is started to drive the hollow rotating shaft 707 to rotate, thereby driving the directional air guide pipe 709 to rotate back and forth. The exhaust gas is evenly introduced into the semi-circular dispersion frame 701 through each air inlet 710, and then enters the treatment box 1 through each dispersion air hole 702. The uniform dispersion of the gas accelerates the gas filtration efficiency.

[0072] Reference Figure 7 and Figure 8 In a preferred embodiment, the outer side wall of the hollow rotating shaft 707 has a connecting hole, and the connecting hole is fixedly connected to a directional air guide pipe 709. The outer side wall of the built-in air intake frame 711 has air intake holes 710 at equal intervals, and the outer side wall of the semi-circular dispersion frame 701 has dispersion air holes 702 at equal intervals.

[0073] Reference Figure 8 In a preferred embodiment, the hollow rotating shaft 707 has a shaft hole on the side away from the forward and reverse motor 706, and the shaft hole is connected to a connecting pipe 708 through a bearing. One end of the connecting pipe 708 is inserted into a long air supply pipe 703, and the outer wall of the long air supply pipe 703 away from the semi-circular dispersion frame 701 is connected to a pipe valve 704 through a flange.

[0074] A method for treating exhaust gas from a thermal power plant, using an exhaust gas treatment device for a thermal power plant as described above, includes the following steps:

[0075] Step 1: During exhaust gas treatment, the exhaust gas enters the hollow rotating shaft 707 through the long gas delivery pipe 703. The forward and reverse motor 706 is started to drive the hollow rotating shaft 707 to rotate, thereby driving the guide pipe 709 to rotate back and forth. The exhaust gas is evenly introduced into the semi-circular dispersion frame 701 through each air inlet 710, and then enters the treatment box 1 through each dispersion air hole 702. The filter plate 3 filters it, and the treated exhaust gas is discharged through the guide frame 2.

[0076] Step 2: After the filter plate 3 has been used for a period of time, adjust the hydraulic cylinder 10 to drive the limiting plate 8 to separate from the filter plate 3. Then, under the action of gravity, the filter plate 3 will gradually deflect downward to between the impact air pipe 506 and the brush plate 510.

[0077] Step 3: Start the air compressor 520 and start the forward and reverse motor 517. The forward and reverse motor 517 drives the impact air pipe 506 to deflect from bottom to top, thereby realizing all-round impact on the back of the filter plate 3. Then, adjust the lifting cylinder 504 to drive the motor shaft 502 to rise, start the drive motor 501, drive the brush 510 to rotate and clean the filter surface of the filter plate 3, and start the collection pump 505 to collect the impurities brushed off.

[0078] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An exhaust gas treatment device for a thermal power plant, characterized in that, Include: Processing box (1); Dispersed intake mechanism (7), set up in the bottom of processing box (1), the dispersed intake mechanism (7) includes semicircle dispersion frame (701), and the bottom of semicircle dispersion frame (701) is fixedly connected with two mounting bases (705), two mounting bases (705) are all fixedly connected on the bottom inner wall of processing box (1); Two side edge support plates (6) are arranged on the two sides of the semicircle dispersion frame (701); Convection treatment mechanism (5) is arranged on the side edge support plate (6); The middle plate (4) is arranged on the two side inner walls of the processing box (1), and the two sides are both connected with the filter plate (3) through the hinge; The hanging plate (9) is fixedly connected to the bottom of the middle plate (4), and the two sides are fixedly connected with the hydraulic cylinder (10) at equal distances, the output end of the plurality of hydraulic cylinders (10) on one side is fixedly connected with the same limiting plate (8), and the top of the limiting plate (8) is in contact with the bottom of the filter plate (3); The air guide frame (2) is arranged in the air guide hole opened in the top of the processing box (1);The convection treatment mechanism (5) comprises: Two motor shaft supports (502) are symmetrically distributed on the top of the side edge support plate (6), one side of one of the motor shaft supports (502) is fixedly connected with a driving motor (501), the output shaft of the driving motor (501) is fixedly connected with a rotating shaft (507) through a shaft coupling, the rotating shaft (507) is hollow, and one end of the rotating shaft (507) is connected to one side of the other motor shaft support (502) through a bearing; The connecting elbow (509) is connected to the mounting hole formed in the motor shaft support (502) through a bearing, and is in communication with the rotating shaft (507); Two jacking air cylinders (504) are fixedly connected to the bottom of the side edge support plate (6) below the motor shaft support (502), and the output end of the jacking air cylinder (504) is fixedly connected to the bottom of the motor shaft support (502);The convection treatment mechanism (5) further comprises: The mounting pipe sleeve (508) is arranged on one side of the motor shaft support (502), and the connecting elbow (509) is fixedly connected to the inside of the mounting pipe sleeve (508); The collection box (503) is arranged on the top of the side edge support plate (6) close to the connecting elbow (509); The collection pump (505) is arranged on one side of the collection box (503), and the collection end of the collection pump (505) is fixedly connected with the telescopic air pipe (511), one end of the telescopic air pipe (511) is inserted into the inside of the connecting elbow (509), and the conveying end of the collection pump (505) is connected to the inside of the collection box (503) through a pipeline;The outer side wall of the rotating shaft (507) is annularly distributed with brush pieces (510), and the outer side wall between each group of brush pieces (510) is equidistantly opened with a collection hole (512).

2. An exhaust gas treatment device for a thermal power plant according to claim 1, characterized in that, The top of the side support plate (6) is fixedly connected with a lifting plate (514) away from the rotating shaft (507), and the top of the lifting plate (514) is fixedly connected with a limiting rail (515), and the inside of the limiting rail (515) is slidably connected with an adjusting slide (519), and the arc surface of the adjusting slide (519) facing upwards is fixedly connected with an impact air pipe (506), and the impact air pipe (506) is provided with an impact hole (513).

3. An exhaust gas treatment device for a thermal power plant according to claim 2, characterized in that The top of the side support plate (6) is fixedly connected with a mounting plate (518) at both ends of the limiting rail (515), and one side of one of the mounting plates (518) is fixedly connected with a forward and reverse motor (517), and the output shaft of the forward and reverse motor (517) is fixedly connected with an adjusting shaft rod (516) through a shaft coupling, and the adjusting slide (519) is fixedly connected to the outer side wall of the adjusting shaft rod (516), and one end of the adjusting shaft rod (516) is connected to one side of the other mounting plate (518) through a bearing, and one side of the lifting plate (514) is fixedly connected with an air compressor (520), and the gas outlet of the air compressor (520) is connected to the inside of the impact air pipe (506) through a pipeline.

4. An exhaust gas treatment device for a thermal power plant according to claim 3, characterized in that The dispersion gas inlet mechanism (7) further comprises: An internal air inlet frame (711) is arranged inside the center point of the semicircular dispersion frame (701); A forward and reverse motor (706) is arranged on the outer wall of the semicircular dispersion frame (701) at the center point, and the output shaft of the forward and reverse motor (706) is fixedly connected with a hollow rotating shaft (707) through a shaft coupling, and the hollow rotating shaft (707) is located at the center position of the internal air inlet frame (711).

5. An exhaust gas treatment device for a thermal power plant according to claim 4, characterized in that The outer side wall of the hollow rotating shaft (707) is provided with a connecting hole, and the inside of the connecting hole is fixedly connected with a pointing air guide pipe (709), and the outer side wall of the internal air inlet frame (711) is provided with air inlet holes (710) at equal intervals, and the outer side wall of the semicircular dispersion frame (701) is provided with dispersion air holes (702) at equal intervals.

6. An exhaust gas treatment device for a thermal power plant according to claim 5, characterized in that The side away from the forward and reverse motor (706) of the hollow rotating shaft (707) is provided with a shaft hole, and the inside of the shaft hole is connected with a butt joint pipe (708) through a bearing, and one end of the butt joint pipe (708) is inserted with a gas conveying long pipe (703), and the outer side wall away from the semicircular dispersion frame (701) of the gas conveying long pipe (703) is connected with a pipe valve (704) through a flange.

7. A method for treating exhaust gas of a thermal power plant using the exhaust gas treatment apparatus for a thermal power plant according to claim 6, characterized by, The steps include: Step one: when the waste gas is treated, the waste gas enters the hollow rotating shaft (707) through the gas conveying long pipe (703), the forward and reverse motor (706) is started to drive the hollow rotating shaft (707) to rotate, thereby driving the pointing air guide pipe (709) to reciprocatingly rotate, the waste gas is uniformly introduced into the semicircular dispersion frame (701) through each air inlet hole (710), and then enters the treatment box (1) through each dispersion air hole (702), and the filter plate (3) filters and treats the waste gas, and the treated waste gas is guided out through the air guide frame (2). Step two: after the filter plate (3) is used for a period of time, adjust the hydraulic cylinder (10) to drive the limiting plate (8) to separate from the filter plate (3), then the filter plate (3) is gradually deflected downward under the action of gravity to the impact air pipe (506) and the brush piece (510); Step three: start the air compressor (520), and start the forward and reverse motor one (517), the forward and reverse motor one (517) drives the impact air pipe (506) to deflect from bottom to top, so as to realize the full range impact of the reverse surface of the filter plate (3), then adjust the lifting air cylinder (504) to drive the motor shaft frame (502) to rise, start the driving motor (501), the driving motor (501) drives the brush piece (510) to rotate and clean the filter surface of the filter plate (3), start the collecting pump (505), the collecting pump (505) collects the impurities brushed off.

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