Monitoring device and monitoring method for thermal power plant

Abstract

The invention relates to the field of power plant monitoring, in particular to a monitoring device for a thermal power plant and a monitoring method.The monitoring device comprises a flue gas purification device and a flue gas detection device.According to the monitoring device, harmful substances in flue gas discharged by the power plant are effectively removed through the flue gas purification device, the purification quality is ensured through the flue gas detection device, and the flue gas is discharged after being qualified; the adsorption purification plates in sliding design and multi-stage purification with gradually increased pore diameters layer by layer effectively improve the flue gas purification efficiency, ensure that the flue gas is sufficiently purified when passing through each purification plate, and meanwhile, facilitate the maintenance and replacement of the purification plates; the blocking risk is reduced; the first motor drives the driving gear and the rack to enable the spoilers of the backflow pipeline and the discharge pipeline to move oppositely, when smoke is detected to be qualified, the backflow pipeline is closed, the discharge pipeline is opened, smoke is discharged smoothly, and the forward rotation and the reverse rotation of the motor control opening and closing of different pipelines respectively.

Description

Technical Field

[0001] The present invention relates to the field of power plant monitoring, and in particular to a monitoring device and a monitoring method for a thermal power plant. Background Art

[0002] Thermal power plants are a widely used power generation method in modern society, and the power generation process is usually achieved by burning fuel. However, after the fuel is burned, a large amount of smoke is generated, which contains dust and a variety of harmful pollutants. Although the power plant will filter the generated smoke to a certain extent before discharging it into the air during the power generation process, when the smoke is not completely treated, especially when the dust or pollutants are not completely removed, direct emission will cause serious environmental problems. In this case, the emission of untreated smoke into the air will have a serious impact on the health of people and animals in the surrounding areas, thereby destroying the natural ecosystem and causing a series of inconveniences and health risks.

[0003] For example, a power plant monitoring device for a thermal power plant with publication number CN216878507U relates to the field of power plant monitoring technology. The generated smoke is collected, detected and processed to avoid incomplete treatment of a large amount of smoke, which is directly discharged into the air, causing serious pollution to the air environment and increasing the pollutants in the air environment, thereby improving the treatment and detection effect of the smoke generated by the power plant, reducing the degree of air pollution caused by smoke, protecting the natural ecosystem, and protecting the health of people and animals.

[0004] However, there are still some problems in actual application:

[0005] 1. In the prior art, all flue gas is directly introduced into the detection device for detection, which is not realistic in actual operation. The intake of a large amount of flue gas may cause the detection tank to overload and hinder the timely discharge of flue gas. If a large amount of untreated flue gas is retained in the tank, it will affect the power generation efficiency of the power plant, and the entire power generation process will be interrupted or the efficiency will be reduced.

[0006] 2. In the prior art, the detection tank is set before the flue gas treatment, which may lead to inaccurate detection results, because the untreated flue gas contains a large amount of harmful substances, which may affect the normal operation of the detection instrument and thus affect the accuracy of the detection results. A detector and an adsorption transfer plate are set in the adsorption treatment tank. Although the harmful substance content of the flue gas can be monitored in real time, the presence of the adsorption transfer plate will interfere with the detector's accurate detection of the flue gas components, causing the detection data to deviate from the actual components. Summary of the invention

[0007] In order to solve the above problems, the present invention provides a monitoring device and a monitoring method for a thermal power plant.

[0008] In a first aspect, a monitoring device for a thermal power plant includes a flue gas purification device and a flue gas detection device, wherein a smoke inlet pipe is connected to the bottom of the flue gas purification device, a smoke exhaust pipe is connected to the upper end of the flue gas purification device, and the other end of the smoke exhaust pipe is connected to the bottom of the flue gas detection device, and an exhaust pipe and a return pipe are installed on the top of the flue gas detection device, and the other end of the return pipe is connected to the bottom of the flue gas purification device;

[0009] The smoke detection device comprises a detection box, a partition plate is provided in the detection box, and a horizontal partition plate is provided on one side of the partition plate, and the internal area of ​​the detection box is divided into a re-purification area, a discharge area and a working area by the partition plate and the partition plate;

[0010] The smoke exhaust duct is connected to the bottom of the re-purification area of ​​the detection box, the exhaust duct and the return duct are connected to one side of the discharge area of ​​the detection box, and a smoke detector is arranged in the discharge area.

[0011] Preferably, a plurality of adsorption purification plates are arranged in the longitudinal direction in the re-purification area, a plurality of circular frames corresponding to the adsorption purification plates are arranged in the re-purification area, and the circular frames are fixed between the partition plate and the inner wall of the detection box, the adsorption purification plates are horizontally slidably installed in the circular frames, an installation opening is opened on the side wall of the detection box and corresponding to the adsorption purification plate, a sealing strip is detachably installed at the installation opening, and the smoke exhaust duct is located below the adsorption purification plate at the lowest end;

[0012] A flow hole is provided at the upper end of the dividing plate.

[0013] Preferably, the filter apertures of the plurality of adsorption purification plates longitudinally distributed in the re-purification area gradually increase from bottom to top.

[0014] Preferably, an emission control component is provided in the emission area, and the emission control component includes two guide rails. The ends of the discharge pipe and the return pipe on the discharge area side are on the same horizontal plane. The two guide rails correspond to the discharge pipe and the return pipe respectively, and the guide rails are fixedly provided on the inner wall of the detection box. A baffle is slidably provided on the guide rails, and the baffles of the two guide rails are respectively used to control the opening of the discharge pipe and the return pipe.

[0015] Preferably, a partition assembly is provided in the re-purification area, and the partition assembly includes two return plates, which are respectively provided on the upper and lower sides of the re-purification area, the upper return plate is located above the uppermost adsorption purification plate, and the lower return plate is located below the lowermost adsorption purification plate and above the smoke exhaust duct, and a plurality of sliding rods distributed in a matrix are provided on the side of the return plate away from the adsorption purification plate, and a closed plate is slidably provided on the plurality of sliding rods on the return plate.

[0016] Preferably, a longitudinally arranged driving rotating rod is provided on the side of the dividing plate facing the working area, and the driving rotating rod is rotatably installed on the side wall of the dividing plate through a bracket, and a partition screw rod threadedly connected to the sealing plate is rotatably installed between the return plate and the inner wall of the detection box and toward one side of the dividing plate, and one end of the partition screw rod facing the adsorption purification plate passes through the return plate and is connected to the driving rotating rod through a belt, and a through hole for the belt to pass through is opened on the dividing plate.

[0017] Preferably, a sealing frame is installed on the side of the dividing plate facing the working area and corresponding to the position of the through hole, the pulley is located in the sealing frame, and the driving rotating rod and the sealing frame are rotatably installed.

[0018] Preferably, a distance is left between the sealing plate and the side wall of the re-purification area.

[0019] Preferably, an extraction pipe is provided on the side of the dividing plate facing the working area, and a plurality of branch pipes penetrating into the re-purification area are connected to the extraction pipe, and the branch pipes are located between the two return plates. An air pump is installed in the working area, one end of the air pump is connected to the extraction pipe, and the other end extends to the bottom of the re-purification area and is located below the return plate.

[0020] In a second aspect, a monitoring method for a thermal power plant is provided, the monitoring method comprising the following steps:

[0021] S1: Flue gas discharged from the power plant enters the flue gas purification device through the smoke inlet pipe, undergoes flue gas purification treatment, and is discharged through the smoke exhaust pipe after purification;

[0022] S2: The smoke enters the re-purification area of ​​the detection box through the smoke exhaust duct. After further purification, the smoke enters the discharge area and is detected by the smoke detector;

[0023] S3: If the treated flue gas is qualified after being tested by the flue gas detector, the flue gas is directly discharged into the atmosphere through the exhaust pipe;

[0024] S4: If the test fails, the flue gas will be transported to the flue gas purification device through the reflux pipe for further flue gas purification treatment until it passes the test of the flue gas detector and is directly discharged into the atmosphere through the exhaust pipe.

[0025] In summary, the present application includes at least one of the following beneficial technical effects:

[0026] 1. The present invention effectively removes harmful substances in the flue gas discharged from the power plant through the flue gas purification device, and ensures the purification quality through the flue gas detection device. The flue gas is discharged after it is qualified, and the unqualified flue gas is refluxed for purification to ensure that the final flue gas meets the environmental protection standards.

[0027] 2. The present invention effectively improves the flue gas purification efficiency through the sliding adsorption purification plate and the multi-stage purification with gradually increasing apertures, ensuring that the flue gas is adequately purified when passing through each purification plate, while facilitating the maintenance and replacement of the purification plate and reducing the risk of blockage.

[0028] 3. The present invention drives the gear and rack through a motor, so that the baffles of the return duct and the exhaust duct can achieve opposite actions. When the smoke is tested to be qualified, the return duct is closed and the exhaust duct is opened to allow the smoke to be discharged smoothly. The forward and reverse rotations of the motor respectively control the opening and closing of different ducts.

[0029] 4. The present invention provides a partition assembly to ensure that there is no smoke leakage in the purification area when replacing the adsorption purification plate, thereby achieving an efficient and pollution-free replacement process and ensuring the stable operation of the equipment and the cleanliness of the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0031] Figure 1 It is a structural schematic diagram of the present invention.

[0032] Figure 2 It is a structural schematic diagram of the smoke detection device of the present invention.

[0033] Figure 3 It is a structural schematic diagram of the adsorption purification plate of the present invention.

[0034] Figure 4 The structure of the emission control component of the present invention is shown in FIG. Figure 1 .

[0035] Figure 5 The present invention Figure 4 A partial enlarged view of point A in the middle.

[0036] Figure 6 The structure of the emission control component of the present invention is shown in FIG. Figure 2 .

[0037] Figure 7 The structure of the partition assembly of the present invention is shown in FIG. Figure 1 .

[0038] Figure 8 The structure of the partition assembly of the present invention is shown in FIG. Figure 2 .

[0039] Fig. 9 The present invention Figure 8 A partial enlarged view of point B in the middle.

[0040] In the figure, 1. Smoke purification device; 2. Smoke detection device; 11. Smoke inlet pipe; 12. Smoke exhaust pipe; 21. Exhaust pipe; 22. Return pipe; 3. Detection box; 31. Dividing plate; 32. Partition plate; 301. Re-purification area; 302. Discharge area; 303. Working area; 33. Smoke detector; 40. Adsorption purification plate; 41. Re-shaped frame; 42. Sealing strip; 310. Flow hole; 5. Emission control component ; 51. Guide rail; 52. Baffle; 53. Connecting plate; 54. Guide rod; 55. Limiting plate; 56. Rack; 57. Motor 1; 58. Driving gear; 60. Return plate; 61. Sliding rod; 62. Sealing plate; 63. Driving rotating rod; 64. Pulley 1; 65. Partition screw rod; 66. Pulley 2; 67. Belt; 311. Through hole; 68. Motor 2; 69. Sealing frame; 71. Extraction pipe; 72. Air pump. DETAILED DESCRIPTION

[0041] The following is combined with Figure 1-Figure 9 Embodiments of the present invention are described in detail.

[0042] The present application discloses a monitoring device and a monitoring method for a thermal power plant, which effectively removes harmful substances in the flue gas discharged from the power plant through a flue gas purification device, ensures the purification quality through a flue gas detection device, and discharges the qualified ones, and refluxes and purifies the unqualified ones, so as to ensure that the final flue gas discharged meets the environmental protection standards.

[0043] Embodiment 1:

[0044] Reference Figure 1 and Figure 2 As shown, a monitoring device for a thermal power plant includes a flue gas purification device 1 and a flue gas detection device 2, a smoke inlet pipe 11 is connected to the bottom of the flue gas purification device 1, a smoke exhaust pipe 12 is connected to the upper end of the flue gas purification device 1, the other end of the smoke exhaust pipe 12 is connected to the bottom of the smoke detection device 2, an exhaust pipe 21 and a return pipe 22 are installed on the top of the smoke detection device 2, and the other end of the return pipe 22 is connected to the bottom of the flue gas purification device 1.

[0045] The flue gas discharged from the power plant enters the flue gas purification device 1 through the smoke inlet pipe 11, and is subjected to flue gas purification treatment by the flue gas purification device 1. The purified flue gas is discharged through the smoke exhaust pipe 12 connected to the upper end of the flue gas purification device 1, and the other side of the smoke exhaust pipe 12 is connected to the bottom of the smoke detection device 2, so that the flue gas treated by the flue gas purification device 1 enters the smoke detection device 2 through the smoke exhaust pipe 12, so as to facilitate the detection of the treated flue gas. If the treated flue gas is qualified after being detected by the smoke detection device 2, it is discharged into the atmosphere through the exhaust pipe 21 connected to the upper end of the smoke detection device 2. If the detection is unqualified, it returns to the flue gas purification device 1 through the reflux pipe 22 arranged at the upper end of the smoke detection device 2 for secondary purification treatment, until it is qualified after being detected by the smoke detection device 2, and is directly discharged into the atmosphere through the exhaust pipe 21.

[0046] Reference Figure 2 As shown, the smoke detection device 2 includes a detection box 3, a partition plate 31 is provided in the detection box 3, and a horizontally arranged partition plate 32 is provided on one side of the partition plate 31. The internal area of ​​the detection box 3 is divided into a re-purification area 301, a discharge area 302 and a working area 303 by the partition plate 31 and the partition plate 32.

[0047] The smoke exhaust pipe 12 is connected to the bottom of the re-purification area 301 of the detection box 3 , the exhaust pipe 21 and the return pipe 22 are connected to one side of the discharge area 302 of the detection box 3 , and a smoke detector 33 is arranged in the discharge area 302 .

[0048] After being treated, the flue gas in the flue gas purification device 1 enters the re-purification area 301 of the detection box 3 through the smoke exhaust pipe 12, and the flue gas is further purified. The further treated flue gas enters the emission area 302 and is detected by the smoke detector 33. If the flue gas is qualified, the flue gas is directly discharged into the atmosphere through the exhaust pipe 21. If it is unqualified, it is transported to the flue gas purification device 1 again through the reflux pipe 22 for flue gas purification again.

[0049] See also Figure 2 and Figure 3 As shown, a plurality of adsorption purification plates 40 are arranged longitudinally in the re-purification area 301, a plurality of circular frames 41 corresponding to the adsorption purification plates 40 are arranged in the re-purification area 301, and the circular frames 41 are fixed between the partition plate 31 and the inner wall of the detection box 3, the adsorption purification plates 40 are horizontally slidably installed in the circular frames 41, and an installation opening is opened on the side wall of the detection box 3 and corresponding to the adsorption purification plates 40, a sealing strip 42 is detachably installed at the installation opening, and the smoke exhaust duct 12 is located below the adsorption purification plate 40 at the lower end.

[0050] By installing a plurality of adsorption purification plates 40 , the flue gas discharged from the smoke exhaust duct 12 into the re-purification area 301 can be further purified, so that the flue gas can be more fully purified.

[0051] A flow hole 310 is opened at the upper end of the partition plate 31 . After being reprocessed by the adsorption purification plate 40 , the flue gas enters the discharge area 302 through the flow hole 310 opened at the upper end of the partition plate 31 .

[0052] In addition, after the adsorption purification plate 40 performs adsorption and purification treatment on the flue gas, particulate matter and other dust in the flue gas will be adsorbed on the adsorption purification plate 40. Over time, the filter holes of the adsorption purification plate 40 will be blocked, affecting the subsequent adsorption and purification treatment of the flue gas. Therefore, the adsorption purification plate 40 of the present invention is slidably arranged in the circular frame 41 to facilitate the subsequent replacement of the new adsorption purification plate 40. Specifically, the staff opens the sealing strip 42 to expose the installation port, and then the staff pulls out the adsorption purification plate 40 in the circular frame 41 to facilitate the replacement of the new adsorption purification plate 40. Finally, the installation port is sealed with the sealing strip 42 to prevent smoke from leaking through the installation port.

[0053] In order to improve the purification efficiency of the flue gas in the re-purification area 301, the filter apertures of the multiple adsorption purification plates 40 distributed longitudinally in the re-purification area 301 of the present invention gradually increase from bottom to top, and the multi-stage adsorption purification treatment layer by layer helps to improve the flue gas purification efficiency.

[0054] The present invention performs multi-stage purification of the flue gas in the exhaust pipe 12 by installing a plurality of adsorption purification plates 40. Each adsorption purification plate 40 is fixed in the circular frame 41 by sliding, which is convenient for replacement and prevents the filter holes from being blocked due to long-term use. At the same time, the filter aperture of each adsorption purification plate 40 gradually increases from bottom to top, realizing multi-stage purification layer by layer, effectively improving the flue gas purification efficiency, and ensuring that the quality of the discharged flue gas meets environmental protection requirements.

[0055] See also Figure 4 and Figure 5 As shown, an emission control component 5 is provided in the emission area 302 . According to the detection result of the smoke detector 33 , the emission control component 5 is controlled to control the activation of the exhaust pipe 21 and the return pipe 22 .

[0056] Specifically, the emission control assembly 5 includes two guide rails 51, and the ends of the exhaust pipe 21 and the return pipe 22 on the exhaust area 302 side are on the same horizontal plane. The two guide rails 51 correspond to the exhaust pipe 21 and the return pipe 22 respectively, and the guide rails 51 are fixedly arranged on the inner wall of the detection box 3. The guide rails 51 are slidably provided with baffles 52, and the baffles 52 of the two guide rails 51 are respectively used to control the opening of the exhaust pipe 21 and the return pipe 22. If the smoke detector 33 detects that the smoke is qualified, the baffle 52 corresponding to the return pipe 22 slides on the guide rail 51 to block the return pipe 22, and at the same time, the baffle 52 corresponding to the exhaust pipe 21 slides on the guide rail 51 to release the blockage of the exhaust pipe 21, so that the smoke in the exhaust area 302 is smoothly discharged into the atmosphere through the exhaust pipe 21.

[0057] See also Figure 5 and Figure 6 As shown, a connecting plate 53 is provided on one side of the spoiler 52, and two guide rods 54 are symmetrically provided at the lower end of the connecting plate 53. The lower ends of the two guide rods 54 are slidably penetrated to the bottom of the partition plate 32 and are commonly connected to a limit plate 55. Racks 56 are provided on the opposite sides of the two limit plates 55 along the longitudinal direction. A motor 57 is installed on the inner wall of the detection box 3 in the working area 303 through a motor bracket, and the motor 57 is located in the middle of the two racks 56. A driving gear 58 is installed at the output end of the motor 57, and the two racks 56 are distributed on both sides of the driving gear 58 and are meshed and connected.

[0058] During the specific implementation process, the motor 57 is started, driving the driving gear 58 to rotate forward, thereby driving the two racks 56 to move in opposite directions, that is, the two baffles 52 are driven to move in opposite directions through two sets of limit plates 55, guide rods 54 and connecting plates 53 respectively. The baffle 52 moving downward will open the corresponding pipe, and the baffle 52 moving upward will close the corresponding pipe. For example, when the motor 57 rotates forward, the discharge pipe 21 is opened and the return pipe 22 is closed; when the motor 57 rotates reversely, the discharge pipe 21 is closed and the return pipe 22 is opened.

[0059] Embodiment 2:

[0060] See also Figure 7 and Figure 8As shown, on the basis of Example 1, since the adsorption purification plate 40 needs to be replaced regularly and the flue gas emission will be in a continuous state, when the adsorption purification plate 40 is replaced, the flue gas in the re-purification area 301 will leak from the installation port. Therefore, in order to avoid this situation, when replacing the adsorption purification plate 40, it is necessary to ensure that no flue gas in the re-purification area 301 leaks from the installation port. The present invention is provided with a partition component in the re-purification area 301, and a plurality of adsorption purification plates 40 are enclosed in a closed space through the partition component to prevent the flue gas from entering the closed space, so that there will be no problem of flue gas leakage when the adsorption purification plate 40 is replaced.

[0061] Specifically, the partition assembly includes two circular plates 60, and the two circular plates 60 are respectively arranged on the upper and lower sides of the re-purification area 301, the upper circular plate 60 is located above the uppermost adsorption purification plate 40, and the lower circular plate 60 is located below the lowermost adsorption purification plate 40 and above the smoke exhaust duct 12, to ensure that the smoke exhaust duct 12 discharges smoke to the bottom side of the re-purification area 301, that is, it is not directly discharged into the confined space, a plurality of sliding rods 61 distributed in a matrix are arranged on the side of the circular plate 60 away from the adsorption purification plate 40, and a closed plate 62 is slidably provided on the plurality of sliding rods 61 on the circular plate 60, the closed plate 62 blocks the through-hole area in the middle of the circular plate 60, that is, the circular plates 60 on both sides separate the re-purification area 301 through the closed plate 62, so that the area between the two circular plates 60 forms a confined space, and all the adsorption purification plates 40 are located in the confined space.

[0062] See also Figure 8 and Fig. 9 As shown, a longitudinally arranged driving rod 63 is provided on the side of the dividing plate 31 facing the working area 303, and the driving rod 63 is rotatably installed on the side wall of the dividing plate 31 through a bracket, and pulleys 64 are installed at both ends of the driving rod 63, and a partition screw rod 65 threadedly connected to the sealing plate 62 is rotatably installed between the return plate 60 and the inner wall of the detection box 3 and facing the side of the dividing plate 31, and the end of the partition screw rod 65 facing the adsorption purification plate 40 passes through the return plate 60 and is then installed with a pulley 2 66, and the pulley 1 64 and the pulley 2 66 are connected by a belt 67, and a through hole 311 for the belt 67 to pass through is opened on the dividing plate 31, and a motor 2 68 is installed at the bottom of the working area 303 through a mounting frame, and the output end of the motor 2 68 is connected to the driving rod 63.

[0063] During the specific implementation process, initially, the two sealed plates 62 are both located at the inner wall of the detection box 3, that is, the upper sealed plate 62 is located at the top of the detection box 3 and above the flow hole 310, and the lower sealed plate 62 is located at the bottom of the detection box 3 and below the smoke exhaust duct 12; when the adsorption purification plate 40 needs to be replaced, the motor 2 68 drives the driving rod 63 to rotate, and then drives the partition screw 65 to rotate through the cooperation of the pulley 1 64, the pulley 2 66 and the belt 67, and then the partition screw 65 drives the sealed plate 62 to move toward the return plate 60 through the threaded connection until the sealed plate 62 is attached to the surface of the return plate 60 to seal the through hole area in the middle of the return plate 60. At this time, a closed space is formed between the two return plates 60. After the replacement of the adsorption purification plate 40 is completed, the motor 2 68 is reversed to reset the sealed plate 62 to the initial state, and the smoke can pass through the adsorption purification plate 40 smoothly.

[0064] When the sealed plate 62 moves to the circular plate 60, the upper sealed plate 62 is below the circulation hole 310 to prevent the circulation hole 310 from being connected to the enclosed space, causing the smoke in the emission area 302 to enter the enclosed space and then leak from the installation port; the lower sealed plate 62 is above the smoke exhaust duct 12. Since the smoke exhaust duct 12 is always discharging smoke into the detection box 3, it is also to prevent the smoke discharged from the smoke exhaust duct 12 from entering the enclosed space. In addition, it should be noted that a certain distance is left between the sealed plate 62 and the side wall of the re-purification area 301 to ensure that when the sealed plate 62 moves in the area between the circular plate 60 and the inner wall of the detection box 3, it will not interfere with the circulation of smoke in the detection box 3.

[0065] In addition, since a hole 311 is provided on the dividing plate 31 to facilitate the smooth operation of the belt 67, the opening of the hole 311 will cause the re-purification area 301 to be connected to the working area 303, so that the flue gas in the re-purification area 301 enters the working area 303, affecting the purification and emission of the flue gas.

[0066] Based on this, in this embodiment, a sealing frame 69 is installed on the side of the dividing plate 31 facing the working area 303 and corresponding to the position of the through hole 311. The pulley 64 is located in the sealing frame 69, and the driving rod 63 and the sealing frame 69 are rotatably installed to ensure that the setting of the sealing frame 69 will not affect the rotation of the driving rod 63. At the same time, the sealing frame 69 is set to prevent the flue gas in the re-purification area 301 from entering the sealing frame 69 through the through hole 311 and entering the working area 303, thereby ensuring the airtightness of the re-purification area 301.

[0067] Continue reading Figure 8As shown, when the two sealed plates 62 are respectively moved to the corresponding return plates 60, a closed space is formed between the two return plates 60, so as to prevent smoke leakage when replacing the adsorption purification plate 40. However, the smoke is filled in the re-purification area 301. After the closed space is formed, there is smoke in the closed space, and this part of the smoke will still leak out. Therefore, when replacing the adsorption purification plate 40, it is necessary to extract the smoke in the closed space. Therefore, in this embodiment, an extraction pipe 71 is provided on the side of the dividing plate 31 facing the working area 303, and a plurality of branch pipes are connected to the extraction pipe 71 to penetrate into the closed space. An air pump 72 is installed in the working area 303, and one end of the air pump 72 is connected to the extraction pipe 71, and the other end extends to the bottom of the re-purification area 301 and is located below the return plate 60.

[0068] Start the air pump 72, and the exhaust pipe 71 extracts the flue gas in the enclosed space through the branch pipe, and then returns to the bottom of the re-purification area 301 after passing through the air pump 72. Only after the flue gas in the enclosed space is completely exhausted, the adsorption purification plate 40 is replaced.

[0069] In addition, the present invention also discloses a monitoring method for a thermal power plant, which comprises the following steps:

[0070] S1: Flue gas discharged from a power plant enters a flue gas purification device 1 through a smoke inlet pipe 11, undergoes flue gas purification treatment, and is discharged through a smoke exhaust pipe 12 after purification.

[0071] S2: The smoke enters the re-purification area 301 of the detection box 3 through the smoke exhaust pipe 12 . After further purification, the smoke enters the discharge area 302 and is detected by the smoke detector 33 .

[0072] S3: If the treated flue gas is qualified after being detected by the flue gas detector 33, the flue gas is directly discharged into the atmosphere through the exhaust pipe 21.

[0073] S4: If the detection is unqualified, the flue gas is transported to the flue gas purification device 1 again through the reflux pipe 22 and subjected to flue gas purification treatment again, until it passes the detection of the flue gas detector 33 and is directly discharged into the atmosphere through the exhaust pipe 21.

[0074] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered as exemplary and non-restrictive in all respects.

[0075] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A monitoring device for a thermal power plant, comprising a flue gas purification device (1) and a flue gas detection device (2), wherein a smoke inlet pipe (11) is connected to the bottom of the flue gas purification device (1), and characterized in that: The upper end of the smoke purification device (1) is connected to a smoke exhaust pipe (12), the other end of the smoke exhaust pipe (12) is connected to the bottom of the smoke detection device (2), a discharge pipe (21) and a return pipe (22) are installed on the top of the smoke detection device (2), and the other end of the return pipe (22) is connected to the bottom of the smoke purification device (1); The smoke detection device (2) comprises a detection box (3), a partition plate (31) is provided in the detection box (3), and a horizontally arranged partition plate (32) is provided on one side of the partition plate (31), and the internal area of ​​the detection box (3) is divided into a re-purification area (301), a discharge area (302) and a working area (303) by the partition plate (31) and the partition plate (32); The smoke exhaust pipe (12) is connected to the bottom of the re-purification area (301) of the detection box (3), the exhaust pipe (21) and the return pipe (22) are connected to one side of the emission area (302) of the detection box (3), and a smoke detector (33) is arranged in the emission area (302).

2. A monitoring device for a thermal power plant according to claim 1, characterized in that: A plurality of adsorption purification plates (40) are arranged in the longitudinal direction in the re-purification area (301), a plurality of circular frames (41) corresponding to the adsorption purification plates (40) are arranged in the re-purification area (301), and the circular frames (41) are fixed between the partition plate (31) and the inner wall of the detection box (3), the adsorption purification plates (40) are horizontally slidably installed in the circular frames (41), an installation opening is opened on the side wall of the detection box (3) and corresponds to the adsorption purification plates (40), a sealing strip (42) is detachably installed on the installation opening, and the smoke exhaust duct (12) is located below the adsorption purification plate (40) at the lowest end; A flow hole (310) is provided at the upper end of the dividing plate (31).

3. A monitoring device for a thermal power plant according to claim 2, characterized in that: The filter apertures of the plurality of adsorption purification plates (40) distributed longitudinally in the re-purification area (301) gradually increase from bottom to top.

4. A monitoring device for a thermal power plant according to claim 1, characterized in that: An emission control component (5) is arranged in the emission area (302), and the emission control component (5) comprises two guide rails (51). The ends of the discharge pipe (21) and the return pipe (22) on the side of the discharge area (302) are on the same horizontal plane. The two guide rails (51) correspond to the discharge pipe (21) and the return pipe (22), respectively, and the guide rails (51) are fixedly arranged on the inner wall of the detection box (3). A baffle plate (52) is slidably arranged on the guide rails (51). The baffle plates (52) of the two guide rails (51) are used to control the opening of the discharge pipe (21) and the return pipe (22), respectively.

5. A monitoring device for a thermal power plant according to claim 2, characterized in that: A partition assembly is provided in the re-purification area (301), and the partition assembly includes two return plates (60), which are respectively arranged on the upper and lower sides of the re-purification area (301), the upper return plate (60) is located above the uppermost adsorption purification plate (40), and the lower return plate (60) is located below the lowermost adsorption purification plate (40) and above the smoke exhaust duct (12), and a plurality of sliding rods (61) distributed in a matrix are provided on the side of the return plate (60) facing away from the adsorption purification plate (40), and a sealing plate (62) is slidably provided on the plurality of sliding rods (61) on the return plate (60).

6. A monitoring device for a thermal power plant according to claim 5, characterized in that: A longitudinally arranged driving rotating rod (63) is provided on one side of the partition plate (31) facing the working area (303), and the driving rotating rod (63) is rotatably mounted on the side wall of the partition plate (31) through a bracket. A partition screw rod (65) threadedly connected to the sealing plate (62) is rotatably mounted between the return plate (60) and the inner wall of the detection box (3) and facing one side of the partition plate (31). One end of the partition screw rod (65) facing the adsorption purification plate (40) passes through the return plate (60) and is connected to the driving rotating rod (63) through a belt (67). A through hole (311) for the belt (67) to pass through is opened on the partition plate (31).

7. A monitoring device for a thermal power plant according to claim 6, characterized in that: A sealing frame (69) is installed on one side of the dividing plate (31) facing the working area (303) and at a position corresponding to the through hole (311). The first pulley (64) is located in the sealing frame (69), and the driving rotating rod (63) and the sealing frame (69) are rotatably installed.

8. A monitoring device for a thermal power plant according to claim 5, characterized in that: A gap is left between the sealing plate (62) and the side wall of the re-purification area (301).

9. A monitoring device for a thermal power plant according to claim 5, characterized in that: A extraction pipe (71) is provided on the side of the partition plate (31) facing the working area (303), and a plurality of branch pipes penetrating into the re-purification area (301) are connected to the extraction pipe (71), and the branch pipes are located between the two return plates (60). An air pump (72) is installed in the working area (303), and one end of the air pump (72) is connected to the extraction pipe (71), and the other end extends to the bottom of the re-purification area (301) and is located below the return plate (60).

10. A monitoring method for a thermal power plant, comprising a monitoring device for a thermal power plant according to any one of claims 1 to 9, characterized in that: The monitoring method includes the following steps: S1: Flue gas discharged from a power plant enters a flue gas purification device (1) through a flue gas inlet pipe (11), undergoes flue gas purification treatment, and is discharged through a flue gas exhaust pipe (12) after purification is completed; S2: The smoke enters the re-purification area (301) of the detection box (3) through the smoke exhaust pipe (12), and after further purification, the smoke enters the discharge area (302) and is detected by the smoke detector (33); S3: If the treated flue gas is found to be qualified after being detected by the flue gas detector (33), the flue gas is directly discharged into the atmosphere through the discharge pipe (21); S4: If the detection fails, the smoke is transported to the smoke purification device (1) again through the return pipe (22) and subjected to smoke purification treatment again until it passes the detection of the smoke detector (33) and is directly discharged into the atmosphere through the discharge pipe (21).

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