A monitoring device and a monitoring method for a thermal power plant

Abstract

The present application relates to the field of power plant monitoring, in particular to a monitoring device and method for thermal power plants, comprising a flue gas purification device and a flue gas detection device, harmful substances in the flue gas discharged by the power plant are effectively removed by the flue gas purification device, the purification quality is ensured by the flue gas detection device, and the flue gas is discharged after passing the test, or is backflowed for further purification if it fails the test, so that the final discharged flue gas meets the environmental protection standards, wherein the sliding design of the adsorption purification plate and the multi-stage purification with layer-by-layer increasing pore size effectively improve the flue gas purification efficiency, ensure that the flue gas is sufficiently purified when passing through each purification plate, and facilitate the maintenance and replacement of the purification plate, reducing the risk of blockage; the motor drives the drive gear and rack, so that the resistance plates of the backflow pipeline and the discharge pipeline realize opposite actions, when the flue gas passes the test, the backflow pipeline is closed and the discharge pipeline is opened, so that the flue gas is smoothly discharged, and the motor forward rotation and reverse rotation respectively control the opening and closing of different pipelines.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of power plant monitoring, in particular to a monitoring device and monitoring method for thermal power plants. BACKGROUND

[0002] Thermal power plants are widely used in modern society as a power generation method, and their power generation process is usually achieved by burning fuel. However, a large amount of smoke containing dust and various harmful pollutants is generated after the fuel is burned. Although the power plant will filter and discharge the smoke into the air to some extent during the power generation process, when the smoke treatment is not complete, especially when the dust or pollutants are not completely removed, direct discharge will cause serious environmental problems. In this case, the smoke that has not been fully treated is discharged into the air, which will have a serious impact on the health of people and animals in the surrounding area, and will further damage the natural ecosystem, causing a series of inconvenience and health risks.

[0003] For example, a power plant monitoring device for thermal power plants, with publication number CN216878507U, relates to the field of power plant monitoring. It collects, detects and processes the generated smoke to avoid incomplete treatment of a large amount of smoke, direct discharge into the air, serious pollution of the air environment, and an increase in air pollutants, thereby improving the detection and treatment effect of the smoke generated by the power plant, reducing the degree of air pollution caused by the smoke, protecting the natural ecosystem, and protecting the health of people and animals.

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

[0005] 1. In the prior art, all flue gas is directly introduced into the detection device for detection, which is not practical in actual operation. The intake of a large amount of flue gas may cause the detection tank to run overload, hindering 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 may be interrupted or the efficiency may be reduced.

[0006] 2. In the prior art, the detection tank is arranged before the flue gas treatment, which may result in inaccurate detection results. Because the untreated flue gas contains a large amount of harmful substances, these substances may affect the normal operation of the detection instrument, thereby affecting the accuracy of the detection results. Although the detection instrument and the adsorption rotating plate are arranged in the adsorption treatment tank, the presence of the adsorption rotating plate may interfere with the accurate detection of the flue gas composition by the detection instrument, resulting in a deviation between the detection data and the actual composition. SUMMARY

[0007] To solve the above problems, the present application provides a monitoring device and monitoring method for thermal power plants.

[0008] The utility model provides a kind of monitoring device for thermal power plant, including flue gas purification device and flue gas detection device, flue gas purification device bottom is connected with smoke inlet pipeline, the upper end of flue gas purification device is connected with smoke outlet pipeline, the other end of smoke outlet pipeline is connected to the bottom of flue gas detection device, discharge pipeline and backflow pipeline are installed at the top of flue gas detection device, the other end of backflow pipeline is connected to the bottom of flue gas purification device;

[0009] The flue gas detection device includes 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. 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 outlet pipeline is connected to the bottom of the re-purification area of the detection box, and the discharge pipeline and the backflow pipeline are connected to one side of the discharge area of the detection box. A flue gas detector is provided in the discharge area.

[0011] Preferably, a plurality of adsorption purification plates are provided longitudinally in the re-purification area. A plurality of back-shaped frames corresponding to the adsorption purification plates are provided in the re-purification area. The back-shaped frames are fixed between the partition plate and the inner wall of the detection box. The adsorption purification plates are horizontally and slidingly installed in the back-shaped frames. Installation openings are provided in the side wall of the detection box corresponding to the adsorption purification plates. Sealing strips are detachably installed in the installation openings. The smoke outlet pipeline is located below the lowermost adsorption purification plate.

[0012] A flow-through hole is provided in the upper end of the partition plate.

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

[0014] Preferably, a discharge control assembly is provided in the discharge area. The end portions of the discharge pipeline and the backflow pipeline on the side of the discharge area are on the same horizontal plane. Two guide rails correspond to the discharge pipeline and the backflow pipeline, respectively. The guide rails are fixedly provided on the inner side wall of the detection box. Blocking plates are slidingly provided on the guide rails. The blocking plates of the two guide rails are used to control the opening of the discharge pipeline and the backflow pipeline, respectively.

[0015] Preferably, a partition assembly is provided in the re-purification area. The partition assembly includes two back-shaped plates. The two back-shaped plates are provided on the upper and lower sides of the re-purification area. The upper back-shaped plate is located above the uppermost adsorption purification plate. The lower back-shaped plate is located below the lowermost adsorption purification plate and above the smoke outlet pipeline. A plurality of sliding rods are provided on the side of the back-shaped plate away from the adsorption purification plate in a matrix distribution. A sealing plate is slidingly provided on the plurality of sliding rods of the back-shaped plate.

[0016] Preferably, the side of the partition plate facing the working area is provided with a longitudinally arranged driving rotating rod, the driving rotating rod is rotatably installed on the side wall of the partition plate through a support, a partition screw rod is rotatably installed between the inner wall of the detection box and the side of the partition plate facing the partition plate and is in threaded connection with the sealing plate, one end of the partition screw rod facing the adsorption and purification plate penetrates between the return plate and the driving rotating rod through a belt connection, and a penetrating hole is formed in the partition plate for the belt to penetrate.

[0017] Preferably, a sealing frame is installed on the side of the partition plate facing the working area and corresponding to the penetrating hole, and a belt wheel is located in the sealing frame, and the driving rotating rod is rotatably installed between the driving rotating rod and the sealing frame.

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

[0019] Preferably, an extraction pipeline is arranged on the side of the partition plate facing the working area, a plurality of branch pipes penetrating into the re-purification area are connected to the extraction pipeline, 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 in communication with the extraction pipeline, 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, and the monitoring method comprises the following steps:

[0021] S1: The flue gas discharged by the power plant enters the flue gas purification device through the flue gas inlet pipeline, is subjected to flue gas purification treatment, and is discharged through the flue gas outlet pipeline after the purification treatment is completed;

[0022] S2: The flue gas enters the re-purification area of the detection box through the flue gas outlet pipeline, is subjected to further purification treatment, and then enters the discharge area and is detected by the flue gas detector;

[0023] S3: If the treated flue gas is qualified after being detected by the flue gas detector, the flue gas is directly discharged into the atmosphere through the discharge pipeline;

[0024] S4: If the detection is unqualified, the flue gas is again conveyed to the flue gas purification device through the return pipeline, is subjected to flue gas purification treatment again, and is directly discharged into the atmosphere through the discharge pipeline after being qualified by the flue gas detector.

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

[0026] Firstly, the flue gas purification device of the present application effectively removes harmful substances in the flue gas discharged by the power plant, the flue gas detection device ensures the purification quality, the flue gas is discharged after being qualified, and the flue gas is re-purified if it is unqualified, so as to ensure that the finally discharged flue gas meets the environmental protection standards.

[0027] Secondly, the application effectively improves the flue gas purification efficiency by the sliding designed adsorption purification plate and multi-stage purification with layer by layer increasing aperture, ensures sufficient purification treatment of flue gas when passing through each purification plate, and facilitates the maintenance and replacement of the purification plate and reduces the risk of blockage.

[0028] Thirdly, the application makes the backflow pipe and the discharge pipe realize opposite actions by the driving gear and the rack driven by the motor, closes the backflow pipe and opens the discharge pipe when the flue gas detection is qualified, and makes the flue gas be discharged smoothly, and the opening and closing of different pipes are controlled by the forward rotation and the reverse rotation of the motor.

[0029] Fourthly, the application ensures no flue gas leakage in the re-purification area when replacing the adsorption purification plate by the setting of the partition assembly, realizes the efficient and pollution-free replacement process, and guarantees the stable operation of the equipment and the clean environment. BRIEF DESCRIPTION OF DRAWINGS

[0030] The application will be further described below in combination with the drawings and examples.

[0031] Figure 1 is a structural schematic diagram of the application.

[0032] Figure 2 is a structural schematic diagram of the flue gas detection device of the application.

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

[0034] Figure 4 is a structural schematic diagram of the discharge control assembly of the application Figure 1 .

[0035] Figure 5 is a local enlarged view of A in the application Figure 4 .

[0036] Figure 6 is a structural schematic diagram of the discharge control assembly of the application Figure 2 .

[0037] Figure 7 is a structural schematic diagram of the partition assembly of the application Figure 1 .

[0038] Figure 8 is a structural schematic diagram of the partition assembly of the application Figure 2 .

[0039] Figure 9 is a local enlarged view of B in the application Figure 8 .

[0040] In the figure, 1, flue gas purification device; 2, flue gas detection device; 11, flue gas inlet pipeline; 12, flue gas discharge pipeline; 21, discharge pipeline; 22, backflow pipeline; 3, detection box; 31, partition plate; 32, partition plate; 301, re-purification area; 302, discharge area; 303, working area; 33, flue gas detector; 40, adsorption purification plate; 41, back frame; 42, sealing strip; 310, flow hole; 5, discharge control assembly; 51, guide rail; 52, resistance plate; 53, connecting plate; 54, guide rod; 55, limiting plate; 56, rack; 57, motor one; 58, drive gear; 60, back plate; 61, sliding rod; 62, sealing plate; 63, drive rotating rod; 64, pulley one; 65, partition lead screw; 66, pulley two; 67, belt; 311, through hole; 68, motor two; 69, sealing frame; 71, discharge pipeline; 72, air pump. DETAILED DESCRIPTION

[0041] The following will be described in detail in combination with the accompanying drawings Figures 1-9 The embodiments of the present application will be described in detail.

[0042] The present application discloses a monitoring device and monitoring method for thermal power plants, which effectively removes harmful substances in flue gas discharged by power plants through a flue gas purification device, ensures purification quality through a flue gas detection device, discharges after passing, and backflows for re-purification if not qualified, so as to ensure that the final discharged flue gas meets environmental protection standards.

[0043] Example one:

[0044] Referring to Figure 1 and Figure 2 , a monitoring device for thermal power plants, comprising a flue gas purification device 1 and a flue gas detection device 2, the flue gas purification device 1 is connected with a flue gas inlet pipeline 11 at the bottom, the flue gas purification device 1 is connected with a flue gas discharge pipeline 12 at the upper end, the other end of the flue gas discharge pipeline 12 is connected to the bottom of the flue gas detection device 2, a discharge pipeline 21 and a backflow pipeline 22 are installed at the top of the flue gas detection device 2, the other end of the backflow pipeline 22 is connected to the bottom of the flue gas purification device 1.

[0045] The flue gas discharged by the power plant enters the flue gas purification device 1 through the flue gas inlet pipe 11, so as to be purified by the flue gas purification device 1. The purified flue gas is discharged through the flue gas discharge pipe 12 connected to the upper end of the flue gas purification device 1. The flue gas discharge pipe 12 is connected to the bottom of the flue gas detection device 2 on the other side, so that the flue gas treated by the flue gas purification device 1 enters the flue gas detection device 2 through the flue gas discharge pipe 12, so as to be detected. If the treated flue gas is qualified after being detected by the flue gas detection device 2, it is discharged into the atmosphere through the discharge pipe 21 connected to the upper end of the flue gas detection device 2. If the detection is unqualified, it is returned to the flue gas purification device 1 through the backflow pipe 22 arranged at the upper end of the flue gas detection device 2 for secondary purification treatment. Until the detection is qualified, the flue gas is directly discharged into the atmosphere through the discharge pipe 21.

[0046] Referring to Figure 2 As shown in the figure, the flue gas detection device 2 comprises a detection box 3, a partition plate 31 is arranged in the detection box 3, and a horizontal partition plate 32 is arranged on one side of the partition plate 31. The internal area of the detection box 3 is divided into a secondary purification area 301, a discharge area 302 and a working area 303 by the partition plate 31 and the partition plate 32.

[0047] The flue gas discharge pipe 12 is connected to the bottom of the secondary purification area 301 of the detection box 3, and the discharge pipe 21 and the backflow pipe 22 are connected to one side of the discharge area 302 of the detection box 3. A flue gas detector 33 is arranged in the discharge area 302.

[0048] The flue gas in the flue gas purification device 1 is treated and then enters the secondary purification area 301 of the detection box 3 through the flue gas discharge pipe 12, so as to be further purified. The further treated flue gas enters the discharge area 302 and is detected by the flue gas detector 33. If the flue gas is qualified, it is directly discharged into the atmosphere through the discharge pipe 21. If it is unqualified, it is transported to the flue gas purification device 1 again through the backflow pipe 22 for flue gas purification treatment.

[0049] Referring to Figure 2 and Figure 3 As shown in the figure, a plurality of adsorption purification plates 40 are arranged in the secondary purification area 301 in the longitudinal direction. A plurality of back-shaped frames 41 corresponding to the adsorption purification plates 40 are arranged in the secondary purification area 301. The back-shaped 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 and slidingly installed in the back-shaped frames 41. An installation opening is formed in the side wall of the detection box 3 and corresponds to the adsorption purification plate 40. A sealing strip 42 is detachably installed in the installation opening. The flue gas discharge pipe 12 is located below the lowermost adsorption purification plate 40.

[0050] By installing multiple adsorption purification plates 40, the flue gas discharged into the re-purification area 301 by the flue gas discharge pipeline 12 can be further purified, so that the flue gas can be more fully purified.

[0051] A flow-through hole 310 is formed in the upper end of the partition plate 31, and after the flue gas is re-processed by the adsorption purification plate 40, it enters the discharge area 302 through the flow-through hole 310 formed in the upper end of the partition plate 31.

[0052] In addition, after the adsorption purification plate 40 purifies the flue gas, the particulate matter and dust in the flue gas will be adsorbed on the adsorption purification plate 40. Over a long period of time, the filter holes of the adsorption purification plate 40 will be blocked, affecting the subsequent adsorption and purification of the flue gas. Therefore, the adsorption purification plate 40 of the present application is slidingly arranged in the back-shaped frame 41, which facilitates the replacement of new adsorption purification plates 40. Specifically, the worker opens the sealing strip 42 to expose the installation opening, then the worker pulls out the adsorption purification plate 40 in the back-shaped frame 41 to replace the new adsorption purification plate 40, and finally seals the installation opening with the sealing strip 42 to prevent the flue gas from leaking through the installation opening.

[0053] In order to improve the purification efficiency of the flue gas in the re-purification area 301, the filter hole diameters of the multiple adsorption purification plates 40 longitudinally distributed in the re-purification area 301 gradually increase from bottom to top. Through multi-stage adsorption and purification processing, the flue gas purification efficiency is improved.

[0054] The present application installs multiple adsorption purification plates 40 to purify the flue gas in the flue gas discharge pipeline 12, each adsorption purification plate 40 is slidingly fixed in the back-shaped frame 41, which facilitates replacement and prevents the filter holes from being blocked due to long-term use. At the same time, the filter hole diameters of each adsorption purification plate 40 gradually increase from bottom to top, realizing multi-stage purification layer by layer, effectively improving the flue gas purification efficiency, and ensuring that the discharged flue gas quality meets the environmental protection requirements.

[0055] Referring to Figure 4 and Figure 5 As shown, the discharge control assembly 5 is arranged in the discharge area 302, and according to the detection result of the flue gas detector 33, the discharge control assembly 5 is used to control the use of the discharge pipeline 21 and the backflow pipeline 22.

[0056] Specifically, the emission control assembly 5 includes two guide rails 51, the end of the exhaust pipe 21 and the return pipe 22 on the same horizontal plane at the emission area 302 side, 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 side wall of the detection box 3. The flow blocking plate 52 is arranged on the guide rail 51 in a sliding manner, and the flow blocking plates 52 of the two guide rails 51 are used to control the opening of the exhaust pipe 21 and the return pipe 22 respectively. If the flue gas detector 33 detects that the flue gas is qualified, the flow blocking plate 52 corresponding to the return pipe 22 is slid on the guide rail 51 to block the return pipe 22, and the flow blocking plate 52 corresponding to the exhaust pipe 21 is slid on the guide rail 51 to unblock the exhaust pipe 21, so that the flue gas in the emission area 302 is smoothly discharged to the atmosphere through the exhaust pipe 21.

[0057] Referring to Figure 5 and Figure 6 As shown in the figure, one side of the flow blocking plate 52 is provided with a connecting plate 53, two guide rods 54 are symmetrically arranged at the lower end of the connecting plate 53, the lower ends of the two guide rods 54 are slidably arranged below the partition plate 32, and the two guide rods 54 are connected to a limiting plate 55, the opposite sides of the two limiting plates 55 are provided with a rack 56 in the longitudinal direction, a motor one 57 is installed on the inner side wall of the detection box 3 in the working area 303 through a motor support, and the motor one 57 is located at the middle position of the two racks 56. A drive gear 58 is installed at the output end of the motor one 57, and the two racks 56 are distributed on the two sides of the drive gear 58 and are connected in meshing.

[0058] In the specific implementation process, the motor one 57 is started to drive the drive gear 58 to rotate forward, thereby driving the two racks 56 to move in opposite directions, that is, the two flow blocking plates 52 are respectively driven by the two sets of limiting plates 55, guide rods 54 and connecting plates 53 to move in opposite directions. The downward moving flow blocking plate 52 will open the corresponding pipe, and the upward moving flow blocking plate 52 will close the corresponding pipe. For example, when the motor one 57 rotates forward, the exhaust pipe 21 is opened, and the return pipe 22 is closed; when the motor one 57 reverses, the exhaust pipe 21 is closed, and the return pipe 22 is opened.

[0059] Example two:

[0060] Referring to Figure 7 and Figure 8As shown, on the basis of the first embodiment, since the adsorption purification plate 40 needs to be replaced regularly, and the flue gas emission is 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 the adsorption purification plate 40 is replaced, it is necessary to ensure that there is no flue gas leaking from the installation port in the re-purification area 301, the present application is provided with a partition assembly in the re-purification area 301, which closes a plurality of adsorption purification plates 40 in a closed space by the partition assembly, prevents flue gas from entering the closed space, so that there is no problem of flue gas leakage when the adsorption purification plate 40 is replaced.

[0061] Specifically, 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 flue gas duct 12, which ensures that the flue gas duct 12 discharges flue gas to the bottom side of the re-purification area 301, that is, it is not directly discharged into the closed space, the side of the return plate 60 away from the adsorption purification plate 40 is provided with a plurality of sliding rods 61 arranged in a matrix, and the plurality of sliding rods 61 on the return plate 60 are commonly provided with a closing plate 62, which blocks the through hole area in the middle of the return plate 60, that is, the two return plates 60 are partitioned by the closing plate 62 to form a closed space between the two return plates 60, and all the adsorption purification plates 40 are located in the closed space.

[0062] Referring to Figure 8 and Figure 9 As shown, a driving rotating rod 63 is arranged longitudinally on the side of the partition plate 31 facing the working area 303, and the driving rotating rod 63 is rotatably installed on the side wall of the partition plate 31 through a support, both ends of the driving rotating rod 63 are provided with a pulley one 64, a partition screw rod 65 connected with the closing plate 62 is rotatably installed between the return plate 60 and the inner wall of the detection box 3 and on the side facing the partition plate 31, and a pulley two 66 is installed at the end of the partition screw rod 65 facing the adsorption purification plate 40 after penetrating through the return plate 60, the pulley one 64 and the pulley two 66 are connected through a belt 67, a through hole 311 is formed on the partition plate 31 for the belt 67 to pass through, a motor two 68 is installed on the bottom of the working area 303 through a mounting bracket, and the output end of the motor two 68 is connected with the driving rotating rod 63.

[0063] In the implementation process, initially, both sealing plates 62 are located at the inner wall of the detection box 3, that is, the upper sealing plate 62 is located at the top of the detection box 3 and above the flow-through hole 310, and the lower sealing plate 62 is located at the bottom of the detection box 3 and below the smoke exhaust duct 12; when it is necessary to replace the adsorption and purification plate 40, the motor two 68 drives the driving rotating rod 63 to rotate, and then drives the partition lead screw 65 to rotate through the cooperation of the pulley one 64, the pulley two 66 and the belt 67, and then the partition lead screw 65 drives the sealing plate 62 to move towards the return plate 60 through threaded connection, until the sealing plate 62 is attached to the surface of the return plate 60, for blocking 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, when the replacement of the adsorption and purification plate 40 is completed, the motor two 68 is reversed, so that the sealing plate 62 is reset to the initial state, and the flue gas can smoothly pass through the adsorption and purification plate 40.

[0064] When the sealing plate 62 moves to the return plate 60, the upper sealing plate 62 is below the flow-through hole 310, avoiding the communication between the flow-through hole 310 and the closed space, so that the flue gas in the discharge area 302 enters the closed space and then leaks from the installation opening; the lower sealing plate 62 is above the smoke exhaust duct 12, since the smoke exhaust duct 12 is always discharging flue gas into the detection box 3, it is also to avoid the flue gas discharged by the smoke exhaust duct 12 from entering the closed space, in addition, it should be noted that a certain spacing is left between the sealing plate 62 and the side wall of the re-purification area 301, to ensure that the sealing plate 62 does not interfere with the flow of flue gas in the detection box 3 when moving in the area between the return plate 60 and the inner wall of the detection box 3.

[0065] In addition, since the partition plate 31 is provided with a through hole 311, it is convenient for the smooth running of the belt 67, but the opening of the through hole 311 will cause the communication between the re-purification area 301 and the working area 303, so that the flue gas in the re-purification area 301 enters the working area 303, affecting the purification and discharge of the flue gas.

[0066] Based on this, the sealing frame 69 is installed on the side of the partition plate 31 facing the working area 303 and corresponding to the position of the through hole 311, the pulley one 64 is located in the sealing frame 69, and the driving rotating 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 rotating rod 63, at the same time, the setting of the sealing frame 69 can block the flue gas in the re-purification area 301 from entering the sealing frame 69 through the through hole 311, and will not enter the working area 303, to ensure the airtightness of the re-purification area 301.

[0067] Continuing to refer to Figure 8As shown, when the two sealing plates 62 are moved to the corresponding return plates 60, a sealed space is formed between the two return plates 60, so that no flue gas is leaked when the adsorption purification plate 40 is replaced, but the flue gas is still in the re-purification area 301. When the sealed space is formed, the flue gas in the sealed space still leaks out, so when the adsorption purification plate 40 is replaced, the flue gas in the sealed space needs to be removed. Therefore, the partition plate 31 is provided with a removal pipeline 71 on the side facing the working area 303, a plurality of branch pipes penetrating into the sealed space are connected to the removal pipeline 71, and a gas pump 72 is installed in the working area 303. One end of the gas pump 72 is in communication with the removal pipeline 71, and the other end extends to the bottom of the re-purification area 301 and is located below the return plate 60.

[0068] The gas pump 72 is started, the removal pipeline 71 removes the flue gas in the sealed space through the branch pipes, and then the flue gas returns to the bottom of the re-purification area 301 after passing through the gas pump 72. Only when the flue gas in the sealed space is completely removed, the adsorption purification plate 40 is replaced.

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

[0070] S1: The flue gas discharged by the power plant enters the flue gas purification device 1 through the flue gas inlet pipeline 11 for flue gas purification treatment, and is discharged through the flue gas outlet pipeline 12 after the purification is completed.

[0071] S2: The flue gas enters the re-purification area 301 of the detection box 3 through the flue gas outlet pipeline 12, is further purified, and then enters the discharge area 302 and is detected by the flue gas 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 discharge pipeline 21.

[0073] S4: If the detection is unqualified, the flue gas is transported to the flue gas purification device 1 again through the return pipeline 22, and is purified again until the detection is qualified after being detected by the flue gas detector 33, and then is directly discharged into the atmosphere through the discharge pipeline 21.

[0074] It is obvious for those skilled in the art that the application is not limited to the details of the above-mentioned exemplary embodiments, and the application can be implemented in other specific forms without departing from the spirit or essential characteristics of the application. Therefore, the embodiments should be regarded as exemplary and non-limiting from any point of view.

[0075] Furthermore, it should be understood that although the specification is described in terms of embodiments, not every embodiment includes every feature described. The specification can include implicit combinations of explicitly mentioned features and / or explicit combinations of implicitely mentioned features. Each embodiment depends on the explicit combinations of features and / or the implicit combinations of features made specifically within that embodiment, and each such embodiment can be combined with every other such embodiment to create further embodiments.

Claims

1. A monitoring device for thermal power plants, comprising a flue gas cleaning device (1) and a flue gas detection device (2), a flue gas inlet pipe (11) being connected to the bottom of the flue gas cleaning device (1), characterized in that: The flue gas purification device (1) is provided with a flue gas discharge pipeline (12) at the upper end, the other end of the flue gas discharge pipeline (12) is connected to the bottom of the flue gas detection device (2), a discharge pipeline (21) and a backflow pipeline (22) are installed at the top of the flue gas detection device (2), the other end of the backflow pipeline (22) is connected to the bottom of the flue gas purification device (1); the flue gas detection device (2) comprises a detection box (3), a partition plate (31) is arranged in the detection box (3), a horizontal partition plate (32) is arranged on one side of the partition plate (31), the inside 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 flue gas discharge pipeline (12) is connected to the bottom of the re-purification area (301) of the detection box (3), the discharge pipeline (21) and the backflow pipeline (22) are connected to one side of the discharge area (302) of the detection box (3), and a flue gas detector (33) is arranged in the discharge area (302); a plurality of adsorption purification plates (40) are arranged in the re-purification area (301) in the longitudinal direction, a plurality of back-shaped frames (41) corresponding to the adsorption purification plates (40) are arranged in the re-purification area (301), the back-shaped 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 and slidingly installed in the back-shaped frames (41), installation openings are formed in the side wall of the detection box (3) and correspond to the adsorption purification plates (40), sealing strips (42) are detachably installed in the installation openings, and the flue gas discharge pipeline (12) is located below the lowermost adsorption purification plate (40); a flow hole (310) is formed in the upper end of the partition plate (31); a partition assembly is arranged in the re-purification area (301), the partition assembly comprises two back-shaped plates (60), the two back-shaped plates (60) are arranged on the upper and lower sides of the re-purification area (301), the upper back-shaped plate (60) is located above the uppermost adsorption purification plate (40), the lower back-shaped plate (60) is located below the lowermost adsorption purification plate (40) and above the flue gas discharge pipeline (12), a plurality of sliding rods (61) arranged in a matrix are arranged on the side of the back-shaped plate (60) away from the adsorption purification plate (40), and a sealing plate (62) is slidingly arranged on the plurality of sliding rods (61) on the back-shaped plate (60); a driving rotating rod (63) is arranged on the side of the partition plate (31) facing the working area (303) in the longitudinal direction, the driving rotating rod (63) is rotatably installed on the side wall of the partition plate (31) through a support, a partition screw rod (65) threadedly connected with the sealing plate (62) is rotatably installed between the back-shaped plate (60) and the inner wall of the detection box (3) and facing the partition plate (31), one end of the partition screw rod (65) facing the adsorption purification plate (40) penetrates through the back-shaped plate (60) and is connected with the driving rotating rod (63) through a belt (67), and a penetrating hole (311) is formed in the partition plate (31) for the belt (67).

2. The monitoring device for a thermal power plant according to claim 1, characterized in that: The multiple adsorption purification plates (40) longitudinally distributed in the re-purification area (301) have gradually increased filter hole diameters from bottom to top.

3. The monitoring device for a thermal power plant according to claim 1, characterized in that: The discharge control assembly (5) is arranged in the discharge area (302), the end of the discharge pipeline (21) and the return pipeline (22) on the side of the discharge area (302) are on the same horizontal plane, the two guide rails (51) correspond to the discharge pipeline (21) and the return pipeline (22) respectively, and the guide rails (51) are fixedly arranged on the inner side wall of the detection box (3), the flow resistance plates (52) are slidably arranged on the guide rails (51), and the flow resistance plates (52) of the two guide rails (51) are used for controlling the opening of the discharge pipeline (21) and the return pipeline (22) respectively. The connecting plate (53) is arranged on one side of the flow resistance plate (52), the two guide rods (54) are symmetrically arranged at the lower end of the connecting plate (53), the lower ends of the two guide rods (54) are slidably arranged below the partition plate (32) and are connected to the limiting plates (55), the toothed racks (56) are arranged on the opposite sides of the two limiting plates (55) in the longitudinal direction, the motor one (57) is installed in the detection box (3) on the inner side wall of the working area (303) through the motor support, and the motor one (57) is located at the middle position of the two toothed racks (56), the drive gear (58) is installed at the output end of the motor one (57), and the two toothed racks (56) are arranged on the two sides of the drive gear (58) and are meshed and connected.

4. The monitoring device for thermal power plants according to claim 1, characterized in that: The sealing frame (69) is installed on the side of the partition plate (31) facing the working area (303) and corresponding to the position of the penetrating hole (311), the belt wheel one (64) is located in the sealing frame (69), and the drive rotating rod (63) is rotatably installed between the sealing frame (69).

5. The monitoring device for a thermal power plant according to claim 1, characterized in that: The closed plate (62) is spaced apart from the side wall of the re-purification area (301).

6. The monitoring device for thermal power plants according to claim 1, characterized in that: The discharge pipeline (71) is arranged on the side of the partition plate (31) facing the working area (303), a plurality of branch pipes penetrating into the re-purification area (301) are connected to the discharge pipeline (71), the branch pipes are located between the two return plates (60), the air pump (72) is installed in the working area (303), one end of the air pump (72) is in communication with the discharge pipeline (71), the other end extends to the bottom of the re-purification area (301), and is located below the return plate (60).

7. A monitoring method for thermal power plants, comprising a monitoring device for thermal power plants according to any one of claims 1 to 6, characterized in that: The monitoring method comprises the following steps: S1: flue gas discharged by the power plant enters the flue gas purification device (1) through the flue gas inlet pipeline (11) and is subjected to flue gas purification treatment, and after the purification is completed, is discharged through the flue gas discharge pipeline (12); S2: the flue gas enters the re-purification area (301) of the detection box (3) through the flue gas discharge pipeline (12), is subjected to further purification treatment, enters the discharge area (302), and is detected by the flue gas detector (33); 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 atmospheric environment through the discharge pipeline (21); S4: if the detection is unqualified, the flue gas is conveyed again to the flue gas purification device (1) through the backflow pipeline (22), is subjected to flue gas purification treatment again, and after the detection is qualified by the flue gas detector (33), is directly discharged into the atmospheric environment through the discharge pipeline (21).

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