Waste gas treatment device of thermal power plant and treatment method thereof

Abstract

The invention discloses a waste gas treatment device of a thermal power plant and a treatment method of the waste gas treatment device, and relates to the technical field of environmental protection engineering construction. The dispersing air inlet mechanism is arranged at the bottom of the treatment box, and the dispersing air inlet mechanism comprises a semicircular dispersing frame. According to the waste gas treatment device of the thermal power plant and the treatment method of the waste gas treatment device, when the filter plate is cleaned, the filter plate is deflected to the bottommost position and is located between the impact gas pipe and the brush piece, the impact gas pipe conducts gas impact on the reverse side of the filter plate, and the brush piece brushes the filter face of the filter plate; the collecting pump adsorbs the filtering surface of the filtering plate through the collecting holes, so that convection cleaning is realized, the cleaning effect of the filtering surface of the filtering plate is improved, meanwhile, small-particle impurities blocked in the filtering holes in the filtering plate can be quickly removed through convection impact treatment, and the filtering plate can efficiently work for a long time; and accumulation and blockage of impurities are avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of environmental protection engineering construction technology, and particularly relates to a waste gas treatment device for a thermal power plant and a treatment method thereof. BACKGROUND

[0002] In the daily operation process of the thermal power plant, the amount of waste gas generated is very large. In order to avoid environmental pollution caused by the discharge of the waste gas, the waste gas needs to be treated by a waste gas treatment device at the discharge end.

[0003] When the existing waste gas treatment device is used to treat the waste gas, the waste gas is first filtered to remove the particulate impurities carried by the waste gas. During the operation of the filter plate, the particulate impurities adhere to the filter plate, causing poor gas passage. At the same time, part of the small particulate impurities easily block the filter holes on the filter plate, causing part of the filter holes to lose their functions. Therefore, with the increase of the treatment time, the filtering efficiency and the filtering effect gradually decrease, reducing the use value of the waste gas treatment device. SUMMARY

[0004] The present application discloses a waste gas treatment device for a thermal power plant, which aims to solve the technical problem that the existing waste gas treatment device first filters the waste gas to remove the particulate impurities carried by the waste gas during the waste gas treatment. During the operation of the filter plate, the particulate impurities adhere to the filter plate, causing poor gas passage. At the same time, part of the small particulate impurities easily block the filter holes on the filter plate, causing part of the filter holes to lose their functions. Therefore, with the increase of the treatment time, the filtering efficiency and the filtering effect gradually decrease.

[0005] In order to achieve the above-mentioned purpose, the present application adopts the following technical solutions: A waste gas treatment device for a thermal power plant, comprising: a treatment box; a dispersed air inlet mechanism arranged at the bottom of the treatment box, the dispersed air inlet mechanism comprising a semicircular dispersion frame, and the bottom of the semicircular dispersion frame being fixedly connected with two mounting bases, and the two mounting bases being fixedly connected to the inner wall of the bottom of the treatment box; two side edge support plates arranged at the two sides of the semicircular dispersion frame; a convection treatment mechanism arranged on the side edge support plates; an intermediate plate arranged at the two side inner walls of the treatment box, and the two sides of the intermediate plate being connected with filter plates through hinges; a hanging plate fixedly connected to the bottom of the intermediate plate, and the two sides of the hanging plate being fixedly connected with hydraulic cylinders at equal distances, the output ends of the hydraulic cylinders on one side being fixedly connected with a same limiting plate, and the top of the limiting plate being in contact with the bottom of the filter plate; a gas guide frame arranged in the gas guide hole opened at the top of the treatment box.

[0006] In a preferred scheme, the convection treatment mechanism comprises: Two motor shaft supports are symmetrically arranged on the top of the side support plate, one side of one of the motor shaft supports is fixedly connected with a driving motor, an output shaft of the driving motor is fixedly connected with a rotating shaft through a shaft coupling, the rotating shaft is hollow, one end of the rotating shaft is connected to one side of the other motor shaft support through a bearing; A connecting elbow is connected to a mounting hole arranged on the motor shaft support through a bearing, and is in communication with the rotating shaft; Two jacking cylinders are fixedly connected to the bottom of the side support plate below the motor shaft supports, and the output end of the jacking cylinder is fixedly connected to the bottom of the motor shaft support.

[0007] In a preferred scheme, the convection treatment mechanism further comprises: A mounting sleeve is arranged on one side of the motor shaft support, and the connecting elbow is fixedly connected to the inside of the mounting sleeve; A collection box is arranged on the top of the side support plate close to the connecting elbow; A collection pump is arranged on one side of the collection box, the collection end of the collection pump is fixedly connected with an extendable air pipe, one end of the extendable air pipe is inserted into the connecting elbow, and the conveying end of the collection pump is connected to the inside of the collection box through a pipeline.

[0008] In a preferred scheme, the outer side wall of the rotating shaft is annularly arranged with brush pieces, and the outer side wall of the rotating shaft is equidistantly opened with a collection hole between each group of brush pieces.

[0009] In a preferred scheme, the top of the side support plate away from the rotating shaft is fixedly connected with a lifting plate, and the top of the lifting plate is fixedly connected with a limiting rail, the inside of the limiting rail is slidingly connected with an adjusting slide, the arc surface of the adjusting slide facing upward is fixedly connected with an impact air pipe, and the impact air pipe is provided with an impact hole.

[0010] In a preferred scheme, the top of the side support plate at both ends of the limiting rail is fixedly connected with a mounting plate, and one side of one of the mounting plates is fixedly connected with a reversible motor, the output shaft of the reversible motor is fixedly connected with an adjusting shaft through a shaft coupling, the adjusting slide is fixedly connected to the outer side wall of the adjusting shaft, one end of the adjusting shaft is connected to one side of the other mounting plate through a bearing, one side of the lifting plate is fixedly connected with an air compressor, and the gas conveying end of the air compressor is connected to the inside of the impact air pipe through a pipeline.

[0011] In a preferred scheme, the dispersion air inlet mechanism further comprises: An internal air inlet frame is arranged in the inside of the semicircular dispersion frame at the center point; The second reversible motor is arranged on one side of the outer wall of the semicircular dispersion frame at the center point, and the output shaft of the second reversible motor is fixedly connected with the hollow rotating shaft through a shaft coupling, and the hollow rotating shaft is located at the center position of the built-in air inlet frame.

[0012] In a preferred embodiment, the outer wall of the hollow rotating shaft is provided with a connecting hole, and a guide air pipe is fixedly connected inside the connecting hole; the outer wall of the built-in air inlet frame is provided with air inlet holes at equal intervals; and the outer wall of the semicircular dispersion frame is provided with dispersion air holes at equal intervals.

[0013] In a preferred embodiment, the outer wall of the hollow rotating shaft is provided with a shaft hole away from the second reversible motor, and a butt joint pipe is connected to the shaft hole through a bearing; one end of the butt joint pipe is inserted with a gas conveying long pipe; and the gas conveying long pipe is connected with a pipe valve through a flange away from the outer wall of the semicircular dispersion frame.

[0014] A waste gas treatment method for a thermal power plant using the waste gas treatment device for a thermal power plant as described above, comprising the following steps: Step one: when treating waste gas, the waste gas enters the hollow rotating shaft through the gas conveying long pipe, the second reversible motor is started to drive the hollow rotating shaft to rotate, thereby driving the guide air pipe to reciprocatingly rotate, the waste gas is uniformly introduced into the semicircular dispersion frame through each air inlet hole, and then enters the treatment box through each dispersion air hole, the filter plate filters and treats the waste gas, and the treated waste gas is guided out through the air guide frame; Step two: after the filter plate is used for a period of time, the limiting plate is separated from the filter plate by adjusting the hydraulic cylinder, and then the filter plate is gradually deflected downward to the position between the impact air pipe and the brush under the action of gravity. Step three: start the air compressor and the first reversible motor, the impact air pipe is deflected from bottom to top driven by the first reversible motor, so as to realize the omnibearing impact of the reverse surface of the filter plate, then the motor shaft frame is raised by adjusting the jacking air cylinder, the driving motor is started, the driving motor drives the brush to rotate and clean the filter surface of the filter plate, and the collecting pump is started to collect the impurities falling off.

[0015] As can be seen from the above, the waste gas treatment device for a thermal power plant provided by the present application has the technical effects that when the filter plate is cleaned, it is deflected to the lowest position, and is located between the impact air pipe and the brush, the impact air pipe impacts the reverse surface of the filter plate, the brush brushes the filter surface of the filter plate, and the collecting pump absorbs the filter surface of the filter plate through the collecting hole, so as to realize the flow cleaning, improve the cleaning effect of the filter surface of the filter plate, and quickly remove the small particle impurities blocked in the filter hole of the filter plate through the flow impact treatment, so that the filter plate can work efficiently for a long time without the technical effects of impurity accumulation and blockage. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1This is a schematic diagram of the overall structure of an exhaust gas treatment device for a thermal power plant proposed by the present invention.

[0017] Figure 2 This is a cross-sectional view of the treatment box structure of an exhaust gas treatment device for a thermal power plant proposed by the present invention.

[0018] Figure 3 for Figure 2 The main view of the overall structure.

[0019] Figure 4 This is a schematic diagram of the combined structure of a convection treatment mechanism and a dispersed air intake mechanism of an exhaust gas treatment device for a thermal power plant proposed by the present invention.

[0020] Figure 5 for Figure 4 A magnified view of the structure of part A.

[0021] Figure 6 This is an enlarged view of the combined structure of the impact air pipe and the limiting rail of the exhaust gas treatment device of a thermal power plant proposed by the present invention.

[0022] Figure 7 This is a schematic diagram of a decentralized air intake mechanism of an exhaust gas treatment device for a thermal power plant proposed by the present invention.

[0023] Figure 8 for Figure 7 Cross-sectional view of the structure of the middle semicircular dispersion frame and built-in air intake frame.

[0024] In the figure: 1. Processing box; 2. Air guide frame; 3. Filter plate; 4. Intermediate plate; 5. Convection treatment 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 elbow; 510. Brush; 511. Telescopic air pipe; 512. Collection hole; 513. Impact hole; 514. Lifting plate; 515. Limiting rail; 516. Adjusting shaft. 517. Forward and reverse motor 1; 518. Mounting plate; 519. Adjusting slide; 520. Air compressor; 6. Side support plate; 7. Dispersed air intake mechanism; 701. Semicircular dispersion frame; 702. Dispersed air holes; 703. Long gas pipe; 704. Pipe valve; 705. Mounting base; 706. Forward and reverse motor 2; 707. Hollow rotating shaft; 708. Docking pipe; 709. Directional air guide pipe; 710. Air intake hole; 711. Built-in air intake frame; 8. Limiting plate; 9. Hanging plate; 10. Hydraulic cylinder. DETAILED DESCRIPTION

[0025] 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. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0026] The waste gas treatment device of a thermal power plant disclosed in the present invention is mainly used in existing waste gas treatment devices. When treating waste gas, it is first filtered to remove the particulate impurities carried by it. During the operation of the filter plate, the 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, as the treatment time increases, the filtration efficiency and filtration effect gradually decrease.

[0027] Reference Figures 1-8 , an exhaust gas treatment device for a thermal power plant, comprising: Processing box 1; The dispersed air intake mechanism 7 is provided at the bottom of the processing box 1. The dispersed air intake mechanism 7 includes a semicircular dispersion frame 701. The bottom of the semicircular dispersion frame 701 is fixedly connected to two mounting bases 705. The two mounting bases 705 are both fixedly connected to the bottom inner wall of the processing box 1. Two side support plates 6 are provided on both sides of the semicircular dispersion frame 701; The convection treatment mechanism 5 is provided on the side support plate 6; The middle plate 4 is arranged on the inner walls of both sides of the processing box 1, and the filter plates 3 are connected to both sides thereof by hinges; The hanging plate 9 is fixedly connected to the bottom of the middle plate 4. Hydraulic cylinders 10 are fixedly connected to both sides of the hanging plate 9 at equal distances. The output ends of multiple hydraulic cylinders 10 on one side are fixedly connected to the same limiting plate 8. 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 on the top of the processing box 1.

[0028] Reference Figures 1-6 In a preferred embodiment, the convection processing mechanism 5 includes: Two motor shaft brackets 502 are symmetrically distributed on the top of the side support plate 6. A drive motor 501 is fixedly connected to one side of one motor shaft bracket 502. The output shaft of the drive motor 501 is fixedly connected to a rotating shaft 507 via a coupling. The rotating shaft 507 is a hollow structure. One end of the rotating shaft 507 is connected to one side of the other motor shaft bracket 502 via a bearing. The connecting elbow 509 is connected to the mounting hole on the motor shaft frame 502 through a bearing and is connected to the rotating shaft 507; Two jacking cylinders 504 are fixedly connected to the bottom of the motor shaft support 502 below the side support plate 6, and the output end of the jacking cylinder 504 is fixedly connected to the bottom of the motor shaft support 502.

[0029] In a specific application scenario, when the filter plate 3 is cleaned, it is deflected to the lowermost position, and it is located between the impact air pipe 506 and the brush sheet 510. The impact air pipe 506 impacts the reverse side of the filter plate 3 with gas, the brush sheet 510 brushes the filter surface of the filter plate 3, and the collection pump 505 absorbs the filter surface of the filter plate 3 through the collection hole 512, thereby realizing flow cleaning and improving the cleaning effect of the filter surface of the filter plate 3. At the same time, the flow impact treatment can quickly remove small particle impurities blocked in the filter holes of the filter plate 3, so that the filter plate 3 can work efficiently for a long time without impurity accumulation and blockage, thereby improving the use value of the exhaust gas treatment device.

[0030] Specifically, after the filter plate 3 is located between the impact air pipe 506 and the brush sheet 510, the air compressor 520 is started, and the forward and reverse motor one 517 is started. The forward and reverse motor one 517 drives the impact air pipe 506 to deflect from bottom to top, thereby realizing omnidirectional impact of the reverse side of the filter plate 3. Then, the jacking cylinder 504 drives the motor shaft support 502 to rise, the driving motor 501 is started, the driving motor 501 drives the brush sheet 510 to rotate and clean the filter surface of the filter plate 3, and the collection pump 505 is started. The collection pump 505 collects the impurities falling off, and at the same time, the collection pump 505 cooperates with the air compressor 520 to push out the impurities blocked in the filter holes of the filter plate 3.

[0031] It should be noted that during the treatment of the filter plate 3, both sides are in a treatment state, and the reverse side is cleaned synchronously with the filter surface, thereby improving the cleaning effect.

[0032] Referring to Figures 4-6 In a preferred embodiment, the flow 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 at the top of the side 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 delivery end of the collection pump 505 is connected to the inside of the collection box 503 through a pipeline.

[0033] Referring to Figure 5In a preferred embodiment, the outer wall of the rotating shaft 507 is annularly distributed with brush pieces 510, and the rotating shaft 507 is equidistantly opened with a collection hole 512 between each group of brush pieces 510.

[0034] Referring to Figure 5 and Figure 6 In a preferred embodiment, the top of the side support plate 6 is fixedly connected with a raised plate 514 away from the rotating shaft 507, and the top of the raised plate 514 is fixedly connected with a limiting rail 515, the inside of the limiting rail 515 is slidingly connected with an adjusting slide 519, the adjusting slide 519 is fixedly connected with an impact air pipe 506 on the arc surface facing upward, and the impact air pipe 506 is provided with an impact hole 513.

[0035] Referring to Figure 6 In a preferred embodiment, 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, the output shaft of the forward and reverse motor 517 is fixedly connected with an adjusting shaft rod 516 through a shaft coupling, the adjusting slide 519 is fixedly connected to the outer wall of the adjusting shaft rod 516, one end of the adjusting shaft rod 516 is connected to one side of the other mounting plate 518 through a bearing, one side of the raised plate 514 is fixedly connected with an air compressor 520, and the gas delivery end of the air compressor 520 is connected to the inside of the impact air pipe 506 through a pipeline.

[0036] Referring to Figure 2 、 Figure 7 and Figure 8 In a preferred embodiment, the dispersion air inlet mechanism 7 further comprises: an internal air inlet frame 711 arranged inside the center point of the semicircular dispersion frame 701; a forward and reverse motor 706 arranged on the outer wall of the center point of the semicircular dispersion frame 701, 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.

[0037] Specifically, when the exhaust gas is introduced, the exhaust gas enters the hollow rotating shaft 707 through the gas delivery long pipe 703, the hollow rotating shaft 707 is driven to rotate by starting the forward and reverse motor 706, thereby driving the gas guide pipe 709 to reciprocate and rotate, and the exhaust 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 uniform dispersion of the gas accelerates the gas filtration efficiency.

[0038] Referring to Figure 7 and Figure 8In a preferred embodiment, the hollow rotating shaft 707 has a connecting hole on its outer wall, and a guide air pipe 709 is fixedly connected inside the connecting hole. The inner wall of the air intake frame 711 has air intake holes 710 equidistantly arranged. The outer wall of the semicircular dispersion frame 701 has dispersion air holes 702 equidistantly arranged.

[0039] With reference to Figure 8 In a preferred embodiment, the hollow rotating shaft 707 has a shaft hole on the side away from the reversible motor 706, and a butt joint pipe 708 is connected inside the shaft hole through a bearing. One end of the butt joint pipe 708 is inserted with a gas conveying long pipe 703, and the gas conveying long pipe 703 is connected with a pipe valve 704 through a flange away from the outer wall of the semicircular dispersion frame 701.

[0040] A waste gas treatment method for a thermal power plant, using a waste gas treatment device for a thermal power plant as described above, comprising the following steps: Step one: during waste gas treatment, the waste gas enters the hollow rotating shaft 707 through the gas conveying long pipe 703, and the reversible motor 706 drives the hollow rotating shaft 707 to rotate, thereby driving the guide air pipe 709 to reciprocatingly rotate. The waste gas is uniformly introduced into the semicircular dispersion frame 701 through each air intake hole 710, and then enters the treatment box 1 through each dispersion air hole 702. The filter plate 3 filters and treats the waste gas, and the treated waste gas is guided out through the guide air frame 2. Step two: after the filter plate 3 is used for a period of time, the limiting plate 8 is separated from the filter plate 3 by adjusting the hydraulic cylinder 10, and then the filter plate 3 is gradually deflected downward to the position between the impact air pipe 506 and the brush sheet 510 under the action of gravity. Step three: start the air compressor 520, and start the reversible motor 517. The reversible motor 517 drives the impact air pipe 506 to deflect from bottom to top, thereby realizing omnidirectional impact on the reverse surface of the filter plate 3. Then, the motor shaft frame 502 is raised by adjusting the lifting air cylinder 504, the driving motor 501 is started, the driving motor 501 drives the brush sheet 510 to rotate and clean the filter surface of the filter plate 3, and the collecting pump 505 is started to collect the impurities brushed off.

[0041] The above description is only a preferred embodiment of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can make equivalent replacements or changes to the technical solution and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A waste gas treatment device for a thermal power plant, characterized in that: include: Processing box (1); A dispersed air intake mechanism (7) is arranged at the bottom of the processing box (1), the dispersed air intake mechanism (7) comprising a semicircular dispersion frame (701), and the bottom of the semicircular dispersion frame (701) is fixedly connected to two mounting bases (705), and the two mounting bases (705) are both fixedly connected to the bottom inner wall of the processing box (1); Two side support plates (6) are arranged on both sides of the semicircular dispersion frame (701); A convection processing mechanism (5) is provided on the side support plate (6); An intermediate plate (4) is arranged on both inner walls of the processing box (1), and both sides of the intermediate plate (4) are connected to the filter plates (3) via hinges; A hanging plate (9) is fixedly connected to the bottom of the middle plate (4), and hydraulic cylinders (10) are fixedly connected to both sides of the hanging plate at equal distances. The output ends of the plurality of hydraulic cylinders (10) on one side are fixedly connected to the same limiting plate (8), and the top of the limiting plate (8) contacts the bottom of the filter plate (3); The air guide frame (2) is arranged in the air guide hole opened on the top of the processing box (1).

2. The exhaust gas treatment device for a thermal power plant according to claim 1, characterized in that: The convection processing mechanism (5) comprises: Two motor shaft frames (502) are symmetrically distributed on the top of the side support plate (6), one side of one motor shaft frame (502) is fixedly connected to a driving motor (501), the output shaft of the driving motor (501) is fixedly connected to a rotating shaft (507) via a coupling, the rotating shaft (507) is a hollow structure, and one end of the rotating shaft (507) is connected to one side of the other motor shaft frame (502) via a bearing; The connecting elbow (509) is connected to the mounting hole provided on the motor shaft frame (502) through a bearing and is in communication with the rotating shaft (507); Two lifting cylinders (504) are fixedly connected to the bottom of the side support plate (6) below the motor shaft frame (502), and the output ends of the lifting cylinders (504) are fixedly connected to the bottom of the motor shaft frame (502).

3. The exhaust gas treatment device for a thermal power plant according to claim 2, characterized in that: The convection processing mechanism (5) further comprises: A mounting sleeve (508) is provided on one side of the motor shaft frame (502), and a connecting elbow (509) is fixedly connected to the interior of the mounting sleeve (508); A collection box (503) is provided on the top of the side support plate (6) near the connecting elbow (509); The collecting pump (505) is arranged on one side of the collecting box (503). The collecting end of the collecting pump (505) is fixedly connected to a telescopic air pipe (511). One end of the telescopic air pipe (511) is inserted into the interior of the connecting elbow (509). The delivery end of the collecting pump (505) is connected to the interior of the collecting box (503) through a pipeline.

4. The exhaust gas treatment device for a thermal power plant according to claim 3, characterized in that: Brush plates (510) are distributed in an annular pattern on the outer side wall of the rotating shaft (507), and collecting holes (512) are opened at equal distances on the outer side wall of the rotating shaft (507) between each group of brush plates (510).

5. The exhaust gas treatment device for a thermal power plant according to claim 4, characterized in that: The top of the side support plate (6) away from the rotating shaft (507) is fixedly connected to a lifting plate (514), and the top of the lifting plate (514) is fixedly connected to a limiting rail (515), the interior of the limiting rail (515) is slidably connected to an adjusting slide (519), and the upward-facing arc surface of the adjusting slide (519) is fixedly connected to an impact air pipe (506), and an impact hole (513) is opened on the impact air pipe (506).

6. The exhaust gas treatment device for a thermal power plant according to claim 5, characterized in that: The side support plates (6) are located at the tops of both ends of the limiting rail (515) and are fixedly connected to mounting plates (518), and one side of one of the mounting plates (518) is fixedly connected to a forward and reverse motor (517), the output shaft of the forward and reverse motor (517) is fixedly connected to an 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, and one side of the lifting plate (514) is fixedly connected to an air compressor (520), and the air supply end of the air compressor (520) is connected to the inside of the impact air pipe (506) through a pipeline.

7. The exhaust gas treatment device for a thermal power plant according to claim 6, characterized in that: The dispersed air intake mechanism (7) further comprises: A built-in air intake frame (711) is arranged inside the semicircular dispersion frame (701) at the center point; The second forward and reverse motor (706) is arranged on an outer wall of one side of the semicircular dispersion frame (701) at the center point. The output shaft of the second forward and reverse motor (706) is fixedly connected to the hollow rotating shaft (707) through a coupling. The hollow rotating shaft (707) is located at the center position of the built-in air intake frame (711).

8. The exhaust gas treatment device for a thermal power plant according to claim 7, characterized in that: The outer wall of the hollow rotating shaft (707) is provided with a connection hole, and the interior of the connection hole is fixedly connected to a directional air guide tube (709), the outer wall of the built-in air intake frame (711) is provided with air intake holes (710) at equal intervals, and the outer wall of the semicircular dispersion frame (701) is provided with dispersion holes (702) at equal intervals.

9. The exhaust gas treatment device for a thermal power plant according to claim 8, characterized in that: The hollow rotating shaft (707) is provided with an axial hole on a side away from the second forward and reverse motor (706), and a butt joint (708) is connected to the inside of the axial hole via a bearing. A long gas transmission pipe (703) is plugged into one end of the butt joint (708), and a pipe valve (704) is connected to the outer wall of the long gas transmission pipe (703) away from the semicircular dispersion frame (701) via a flange.

10. A method for treating waste gas from a thermal power plant, using the waste gas treatment device for a thermal power plant according to claim 9, characterized in that: The following steps are involved: Step 1: When the waste gas is treated, the waste gas enters the hollow rotating shaft (707) through the long gas transmission tube (703), and the forward and reverse motor 2 (706) is started to drive the hollow rotating shaft (707) to rotate, thereby driving the directional air guide tube (709) to rotate back and forth. The waste gas is evenly introduced into the semicircular dispersion frame (701) through each air inlet hole (710), and then enters the treatment box (1) through each dispersion hole (702). The filter plate (3) filters the waste gas, and the treated waste gas is discharged through the air guide frame (2); Step 2: After the filter plate (3) has been used for a period of time, the hydraulic cylinder (10) is adjusted to drive the limiting plate (8) to separate from the filter plate (3), and the filter plate (3) is gradually deflected downward to between the impact air pipe (506) and the brush plate (510) under the action of gravity; 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 achieving all-round impact on the back of the filter plate (3). Then adjust the jacking cylinder (504) to drive the motor shaft frame (502) to rise, start the drive motor (501), and the drive motor (501) drives the brush (510) to rotate and clean the filter surface of the filter plate (3). Start the collection pump (505), and the collection pump (505) collects the impurities brushed off.

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