Distributed multi-region flue gas flow velocity and flow measurement device and method

Abstract

The invention discloses a distributed multi-region flue gas flow velocity and flow measurement device and method, and relates to the field of flow velocity measurement. A distributed multi-area flue gas flow velocity and flow measuring device comprises an installation pipe which is fixedly communicated with a flue gas branch pipe through a flange, and further comprises a flow measuring meter which is fixedly installed on the side, close to the gas outlet end, of the installation pipe, and the measuring end of the flow measuring meter extends into the installation pipe; according to the invention, two flowmeters with different principles are adopted to cooperate with each other, and because the flowmeters with different principles have different measurement characteristics and error sources, when the measurement results of the two flowmeters are similar, it can be considered that the measurement data have high reliability; when a large difference exists in a measurement result, problems can be found in time, errors caused by factors such as a measurement equipment fault or a measurement environment are further checked, and the accuracy of flue gas flow velocity and flow measurement is remarkably improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of flow velocity measurement, and in particular, relates to a distributed multi-region flue gas velocity and flow measurement device and method. Background Art

[0002] In the process of industrial production, such as thermal power generation, metallurgy, chemical industry and other industries, a large amount of flue gas will be generated. Effective treatment and monitoring of flue gas is the key link to ensure production compliance and environmental protection standards. In the flue gas treatment system, there are usually multiple flue gas branch pipes. The amount and flow rate of flue gas generated in different production links are different. Accurately measuring the flue gas flow rate of each branch pipe will help to understand the operation status of the production process in real time, adjust the production parameters in time, and ensure the stability and efficiency of production. For example, in chemical production, the flue gas generated by the reaction process is discharged through different branch pipes. The change in the flue gas flow rate can reflect the intensity of the reaction or the operating status of the equipment. By monitoring the flow rate, problems can be discovered in time and measures can be taken.

[0003] However, in actual applications of existing flue gas velocity and flow measurement devices, since the flue gas usually contains a large amount of impurities such as dust, these impurities can easily enter the measurement device, affecting the accuracy and service life of the measuring instrument, which may lead to inaccurate measurement results. In addition, traditional measurement devices often only use a flow meter based on a single principle for measurement. Since the flue gas velocity varies greatly under different working conditions, it is difficult for a single flow meter to maintain a high measurement accuracy under various flow rate conditions, and it cannot meet the needs of accurate measurement under complex working conditions. In view of this, the present invention is specially proposed. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and to provide a distributed multi-zone flue gas velocity flow measurement device and method that can overcome the above problems or at least partially solve the above problems.

[0005] In order to solve the above technical problems, the basic concept of the technical solution adopted by the present invention is: a distributed multi-region flue gas velocity flow measurement device, including a mounting pipe, the mounting pipe is fixedly connected to the flue gas branch pipe through a flange, and also includes: a flow meter, fixedly mounted on one side of the mounting pipe close to the air outlet end, and the measuring end of the flow meter extends into the mounting pipe; a dust filter plate, fixedly mounted on one side of the mounting pipe close to the air inlet end; two support plates are fixedly connected in the mounting pipe and are located on both sides of the dust filter plate; a rotating shaft, rotatably connected between the two support plates, And it passes through the dust filter plate horizontally; the scraper is fixedly connected to the rotating shaft at circumferentially equidistant intervals, and slides against the dust filtering surface of the dust filter plate; the driving fan blade is fixedly connected to the rotating shaft, and is located on the side of the dust filter plate away from the scraper; the impeller is fixedly installed on the rotating shaft, and is located on the side of the driving fan blade away from the dust filter plate; a mounting opening is opened on the mounting tube near the impeller, a mounting shell is fixedly connected at the mounting opening in the mounting tube, the rotating shaft passes through the mounting shell, and a speed sensor used in conjunction with the impeller is installed in the mounting shell.

[0006] In order to facilitate the collection and centralized treatment of dust, a through opening is further opened at the bottom of the mounting tube near the dust filter plate, and the through opening is arranged on the side of the dust filter plate close to the scraper. A dust collecting shell connected to the through opening is fixedly connected to the bottom of the mounting tube, and a sealing plug is installed at the opening at the lower end of the dust collecting shell.

[0007] In order to facilitate dust cleaning without stopping the machine, the dust collecting shell is further provided with a slot horizontally near the opening, a sealing plate is inserted in the slot, and one end of the sealing plate located inside the dust collecting shell is fixedly connected to a limiting strip.

[0008] In order to facilitate the smoother movement of the blocking plate and avoid the problem of difficulty in moving the blocking plate caused by dust, further, the limiting strip is a triangular plate.

[0009] In order to facilitate the dust to contact the dust filter plate more fully and improve the filtering effect, further, the dust filter plate is a conical filter cartridge.

[0010] In order to provide a certain amount of power to the scraper, thereby reducing the influence of the friction between the scraper and the dust filter plate on the rotation speed of the rotating shaft, so as to facilitate the correction of the impeller rotation speed and ensure the metering accuracy of the impeller flowmeter, further, the scraper is provided with an inclined surface for providing power to the rotating shaft.

[0011] In order to facilitate the heat exchange of flue gas and appropriately reduce the temperature of the flue gas to avoid the high flue gas temperature affecting the measurement accuracy and service life of the flow meter, it further includes a heat exchange tube, which is installed in the mounting tube through a mounting block and is located between the rotating shaft and the flow meter.

[0012] In order to facilitate breaking up irregular flow patterns such as eddies and turbulence in the gas and make the gas gradually tend to a more regular and uniform flow state, thereby achieving the effects of rectification and uniform distribution to a certain extent, further, the heat exchange tube is spirally spiraled in the installation tube.

[0013] A method for measuring the air flow velocity of flue gas mainly comprises the following steps:

[0014] S1: Fix the installation pipe to the flue gas branch pipe through the flange to ensure a tight connection to prevent flue gas leakage;

[0015] S2: Check whether all components are firmly installed and connected properly, calibrate the flow meter and speed sensor to ensure that the measurement data is accurate and reliable, and confirm that the dust filter is clean and unblocked;

[0016] S3: Flue gas flows from the flue gas branch pipe into the installation pipe, and first passes through the dust filter plate, which intercepts dust and other impurities in the flue gas;

[0017] S4: When the smoke continues to flow through the dust filter plate in the installation pipe, the driving fan blades will be impacted by the flowing smoke and drive the rotating shaft to rotate, thereby driving the scraper to rotate on the dust filter plate to scrape off the dust attached to the dust filter plate;

[0018] S5: At the same time, the rotating shaft will also drive the impeller to rotate. Since the speed of the impeller is proportional to the wind speed, the speed sensor can obtain the current flue gas flow rate data by measuring and calculating the impeller speed. When the flue gas passes through the flow meter, the flow meter will measure the flow rate of the flue gas again.

[0019] S6: By comparing and analyzing the data measured by the host machine for the speed sensor and the impeller and the data measured by the flow meter, more accurate flue gas velocity and flow data can be obtained.

[0020] After adopting the above technical scheme, the present invention has the following beneficial effects compared with the prior art: the present invention effectively blocks the dust in the flue gas through the setting of the dust filter plate, prevents the dust from entering the flow meter, and avoids the problem of reduced measurement accuracy of the flow meter due to the influence of dust. The rotating shaft drives the scraper to rotate on the dust filter plate, which can automatically scrape off the dust attached to the dust filter plate, avoiding the dust filter plate from being quickly blocked, thereby ensuring the filtration efficiency of the dust filter plate and the smooth flow of flue gas in the device, thereby maintaining the good performance and stable operation of the entire measuring device.

[0021] By using two flow meters based on different principles to cooperate with each other, since flow meters based on different principles have different measurement characteristics and error sources, when the measurement results of the two flow meters are similar, it can be considered that the measurement data has a higher reliability; when there are large differences in the measurement results, the problem can be discovered in time, and further investigation can be carried out to determine whether the error is caused by factors such as measurement equipment failure or measurement environment, thereby significantly improving the accuracy of flue gas velocity flow measurement.

[0022] Since the simulated impeller flowmeter may have large errors when measuring flue gas at low flow rates, the flow meter in this device can use a flow meter suitable for low flow rates, such as a thermal flowmeter. By using these two flow meters in combination, a wider range of velocity measurements is covered. Regardless of whether the flue gas is flowing fast or slow, there can be a relatively accurate measurement method to ensure that accurate flow rate data can be obtained under various working conditions, thereby improving the adaptability and practicality of the device.

[0023] The specific implementation modes of the present invention are further described in detail below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In the attached picture:

[0025] Figure 1 This is a schematic diagram of the structure of the present invention installed on multiple smoke branch pipes in a smoke duct;

[0026] Figure 2 It is a structural schematic diagram of the present invention;

[0027] Figure 3 The structure of the interior of the installation tube of the present invention is schematically shown. Figure 1 ;

[0028] Figure 4 The structure of the interior of the installation tube of the present invention is schematically shown Figure 2 ;

[0029] Figure 5 It is a structural schematic diagram of a part of the structure of the present invention;

[0030] Figure 6It is a schematic diagram of the structure of the dust filter plate, the rotating shaft and the scraper in the present invention;

[0031] Figure 7 It is a schematic cross-sectional structure diagram of the rotating shaft and the scraper in the present invention;

[0032] Figure 8 For the present invention Figure 4 Schematic diagram of the structure of part A.

[0033] In the figure: 1. Flue gas branch pipe; 2. Mounting pipe; 201. Flow meter; 202. Dust filter plate; 203. Mounting shell; 204. Speed ​​sensor; 205. Through port; 206. Dust collecting shell; 207. Sealing plug; 208. Sealing plate; 209. Limiting strip; 3. Rotating shaft; 301. Scraper; 3011. Inclined surface; 3012. Water cavity; 3013. Water spray hole; 302. Driving blade; 303. Impeller; 4. Heat exchange tube. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0035] Embodiment 1:

[0036] Reference Figure 1-Figure 5, a distributed multi-area flue gas velocity and flow rate measuring device, comprising a mounting pipe 2, the mounting pipe 2 is fixedly connected to a flue gas branch pipe 1 through a flange, the flue gas branch pipe 1 is used to transport flue gas and is the flue gas source channel of the entire measuring device, and also comprises: a flow meter 201, fixedly mounted on one side of the mounting pipe 2 close to the air outlet, the measuring end of the flow meter 201 extends into the mounting pipe 2, and is used to measure the flue gas velocity and flow rate, and other flow meters except the impeller flow meter can be used; a dust filter plate 202, fixedly mounted on one side of the mounting pipe 2 close to the air inlet end, capable of intercepting dust in the flue gas to prevent the dust from affecting subsequent measurements; two support plates are fixedly connected in the mounting pipe 2 and are located on both sides of the dust filter plate 202; a rotating shaft 3, rotatably connected between the two support plates, and horizontally passing through the dust filter plate 2 02; the scraper 301 is fixedly connected to the rotating shaft 3 at equidistant intervals on the circumference, and slides against the dust filtering surface of the dust filter plate 202, so that the dust on the dust filter plate 202 can be scraped off under the drive of the rotating shaft 3; the driving blade 302 is fixedly connected to the rotating shaft 3, and is located on the side of the dust filter plate 202 away from the scraper 301; the impeller 303 is fixedly installed on the rotating shaft 3, and is located on the side of the driving blade 302 away from the dust filter plate 202, and is used in conjunction with the impeller 303, and the flue gas flow rate is obtained by monitoring the rotation speed of the impeller 303; an installation opening is opened on the installation tube 2 near the impeller 303, and a mounting shell 203 is fixedly connected to the mounting opening in the installation tube 2, the rotating shaft 3 passes through the mounting shell 203, and a speed sensor 204 used in conjunction with the impeller 303 is installed in the mounting shell 203.

[0037] When the flue gas flows from the flue gas branch pipe 1 into the installation pipe 2, it first passes through the dust filter plate 202. The dust filter plate 202 can effectively intercept the dust carried in the flue gas, so that the dust content of the flue gas entering the rear of the installation pipe 2 is reduced, thereby reducing the impact of dust on subsequent measurement components.

[0038] As the smoke continues to flow in the installation pipe 2, the driving blades 302 will be affected by the impact force of the flowing smoke. Since the driving blades 302 are fixedly connected to the rotating shaft 3, under the action of the impact force of the smoke, the driving blades 302 begin to rotate, thereby driving the rotating shaft 3 to rotate between the support plates 205. When the rotating shaft 3 rotates, the scraper 301 fixedly connected to its circumference equidistantly also slides on the dust filtering surface of the dust filter plate 202. The scraper 301 scrapes off the dust attached to the dust filter plate 202, avoiding the dust filter plate 202 from being quickly blocked due to dust accumulation, thereby ensuring the normal filtering function of the dust filter plate 202 and the smooth flow of smoke in the device.

[0039] At the same time, the rotating shaft 3 will also drive the impeller 303 to rotate. Since the rotation speed of the impeller 303 is proportional to the wind speed, the speed sensor 204 installed in the mounting shell 203 can monitor the rotation speed of the impeller 303 in real time. By measuring and calculating the rotation speed of the impeller 303, the speed sensor 204 can know the current flow rate of the flue gas. This principle is similar to that of an impeller flow meter. When the flue gas passes through the flow meter 201, the flow meter 201 will measure the flow rate of the flue gas again.

[0040] Among them, the flow meter 201 on the installation pipe 2 can adopt other types of flow meters except the impeller flow meter. Since flow meters based on different principles have different measurement characteristics and error sources, by using two different types of flow meters to measure the flue gas flow rate, the measurement results can be calibrated and verified with each other. If the measurement results of the two flow meters are similar, then the measurement data can be considered to be reliable. If there is a large difference in the results, the problem can be discovered in time, and further investigation can be carried out to determine whether the error is caused by factors such as measurement equipment failure or measurement environment, thereby significantly improving the accuracy of flue gas flow rate measurement.

[0041] In addition, since the simulated impeller flowmeter may have large errors when measuring low-flow flue gas, the flow meter 201 can use a flowmeter suitable for low flow rates, such as a thermal flowmeter. By using these two flowmeters in combination, a wider speed measurement range can be covered. Regardless of whether the flue gas is flowing fast or slow, there can be a relatively accurate measurement method to ensure that accurate flow rate data can be obtained under various working conditions.

[0042] Embodiment 2:

[0043] Reference Figure 3 , Figure 4 , Figure 8A distributed multi-region flue gas velocity flow measurement device is basically the same as Example 1. Furthermore, a through-port 205 is provided at the bottom of the mounting tube 2 near the dust filter plate 202. The through-port 205 is provided on the side of the dust filter plate 202 near the scraper 301. A dust collecting shell 206 connected to the through-port 205 is fixedly connected to the bottom of the mounting tube 2. A sealing plug 207 is installed at the opening at the lower end of the dust collecting shell 206. When the scraper 301 rotates on the dust filter plate 202 to scrape off the dust, the dust can fall directly into the dust collecting shell 206 below through the through-port. In order to realize the timely collection of scraped dust, the dust is prevented from flying or accumulating again in the installation tube 2, and the airflow in the installation tube 2 is ensured to be smooth and the measuring environment is clean. A sealing plug 207 is installed at the opening of the lower end of the dust collecting shell 206. During normal measurement work, the sealing plug 207 can ensure the sealing of the dust collecting shell 206 to prevent smoke leakage and dust from flying out. When the dust in the dust collecting shell 206 needs to be cleaned, the sealing plug 207 only needs to be opened to conveniently discharge the dust, which reduces the maintenance difficulty and workload of the device and improves the maintenance efficiency.

[0044] When the dust in the dust collecting shell 206 is full and overflowing, the dust accumulated at the bottom of the mounting tube 2 will generate a certain resistance to the scraper 301, thereby reducing the rotation speed of the rotating shaft 3. At this time, the rotation speed of the impeller 303 detected by the speed sensor 204 will decrease. According to the data changes detected by the speed sensor 204, it can be known that the dust collecting shell 206 is full of dust, and then the staff can clean the dust.

[0045] A slot is horizontally opened in the dust collecting shell 206 near the opening 205, and a sealing plate 208 is inserted in the slot. One end of the sealing plate 208 is located inside the dust collecting shell 206 and is fixedly connected to a limit strip 209. In the initial state, the sealing plate 208 is in an open state. When the dust collecting shell 206 is full of dust and needs to be cleaned, the sealing plate 208 can be pushed to block the opening 205, so that the dust can be cleaned without stopping the machine.

[0046] The limiting strip 209 is a triangular plate. By designing the limiting strip 209 into a triangular shape, when the blocking plate 208 is pushed to block the opening 205, the triangular limiting strip 209 can move dust to the upper and lower sides, so that the blocking plate 208 can move more smoothly, avoiding the problem of dust causing difficulty in moving the blocking plate 208.

[0047] Embodiment 3:

[0048] Reference Figure 3 , Figure 5 , Figure 6, a distributed multi-zone flue gas velocity flow measurement device, which is basically the same as Example 2, and further, the dust filter plate 202 is a conical filter cartridge. In the same space, the conical dust filter plate 202 has a larger surface area than a flat plate and the like, and the unit dust filter layout area is increased, which can intercept more dust, thereby improving the overall dust removal capacity. At the same time, the conical structure can make it easier for the airflow to form a more uniform distribution when passing through the dust filter plate 202, reducing airflow dead corners and eddy currents, which not only helps the dust to contact the dust filter plate 202 more fully and improve the filtering effect, but also allows the flue gas to stabilize faster after leaving the dust filter plate 202, thereby allowing the distance between the dust filter plate 202 and the flow meter 201 to be appropriately reduced, thereby shortening the size of the device.

[0049] like Figure 6 As shown, the scraper 301 is provided with an inclined surface 3011 for providing power to the rotating shaft 3. Through the setting of the inclined surface 3011, when the flowing flue gas contacts the scraper 301, the flue gas will provide a certain power to the scraper 301 with the cooperation of the inclined surface 3011, thereby reducing the influence of the friction between the scraper 301 and the dust filter plate 202 on the rotation speed of the rotating shaft 3, thereby facilitating the correction of the rotation speed of the impeller 303 and ensuring the metering accuracy of the impeller flowmeter.

[0050] Embodiment 4:

[0051] Reference Figure 3-Figure 5 , a distributed multi-region flue gas velocity flow measurement device, is basically the same as Example 3, and further includes a heat exchange tube 4, which is installed in the mounting tube 2 through a mounting block and is located between the rotating shaft 3 and the flow meter 201. Through the setting of the heat exchange tube 4, the flue gas can be heat exchanged, so as to appropriately reduce the temperature of the flue gas and avoid the high flue gas temperature affecting the measurement accuracy and service life of the flow meter 201.

[0052] The heat exchange tube 4 is spirally spiraled in the installation tube 2. By spirally spiraling the heat exchange tube 4 in the installation tube 2, when the flue gas passes through the heat exchange tube 4, the contact area between the flue gas and the heat exchange tube 4 can be increased, thereby effectively improving the cooling effect on the flue gas. At the same time, when the flue gas passes through the heat exchange tube 4, the guidance of the flow channel of the heat exchange tube 4 will cause the gas flow direction and velocity distribution to be continuously adjusted. The vortex structure can break up irregular flow patterns such as vortices and turbulence in the gas, so that the gas gradually tends to a more regular and uniform flow state, thereby achieving the effects of rectification and uniform distribution to a certain extent, further improving the measurement accuracy of the subsequent flow meter 201, and at the same time shortening the distance between the dust filter plate 202 and the flow meter 201, so as to reduce the length of the device, reduce the size of the device, and reduce the space occupied by the device.

[0053] Embodiment 5:

[0054] Reference Figure 4-Figure 7 , a distributed multi-region flue gas velocity flow measurement device, which is basically the same as Example 4, and further, a conveying channel is opened in the rotating shaft 3, a water cavity 3012 is opened in the scraper 301, the water cavity 3012 in the scraper 301 is connected with the conveying channel in the rotating shaft 3, and a plurality of water spray holes 3013 connected with the water cavity 3012 are equidistantly opened on one side of the scraper 301 close to the inclined surface 3011, the water inlet end of the heat exchange tube 4 extends out of the mounting tube 2, the water outlet end of the heat exchange tube 4 is connected with the conveying channel of the rotating shaft 3, and is rotatably connected with the rotating shaft 3 through a rotating joint.

[0055] When cooling water is delivered to the heat exchange tube 4 by an external water pump to cool the high-temperature flue gas, the water flowing out through the water outlet end of the heat exchange tube 4 will be delivered into the delivery channel in the rotating shaft 3, and then the water flow will enter the water cavity 3012 of the scraper 301 through the delivery channel, and finally the water flow will be sprayed out through the water spray hole 3013, thereby providing a certain power to the scraper 301, further reducing the influence of the friction between the scraper 301 and the dust filter plate 202 on the rotation speed of the rotating shaft 3, thereby facilitating the correction of the rotation speed of the impeller 303, and at the same time, when the high-temperature flue gas comes into contact with the sprayed water, it can also have a certain cooling effect on the temperature of the flue gas, thereby avoiding the high flue gas temperature affecting the measurement accuracy and service life of the flow meter.

[0056] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as above with a preferred embodiment, it is not used to limit the present invention.

Claims

1. A distributed multi-region flue gas velocity flow measurement device, characterized in that: The invention comprises a mounting pipe (2), wherein the mounting pipe (2) is fixedly connected to the flue gas branch pipe (1) via a flange, and further comprises: A flow meter (201) is fixedly mounted on a side of the mounting tube (2) close to the gas outlet end, and a measuring end of the flow meter (201) extends into the mounting tube (2); A dust filter plate (202) is fixedly mounted on a side of the mounting tube (2) close to the air inlet end; Two support plates are fixedly connected inside the installation tube (2) and are located on both sides of the dust filter plate (202); A rotating shaft (3) is rotatably connected between the two support plates and transversely penetrates the dust filter plate (202); The scraper (301) is fixedly connected to the rotating shaft (3) at equal distances around the circumference and is slidably attached to the dust filtering surface of the dust filtering plate (202); A driving fan blade (302) is fixedly connected to the rotating shaft (3) and is located on a side of the dust filter plate (202) away from the scraper plate (301); An impeller (303) is fixedly mounted on the rotating shaft (3) and is located on a side of the driving blade (302) away from the dust filter plate (202); The mounting tube (2) is provided with a mounting opening at a position close to the impeller (303); a mounting shell (203) is fixedly connected to the mounting tube (2) at the mounting opening; the rotating shaft (3) passes through the mounting shell (203); and a speed sensor (204) used in conjunction with the impeller (303) is installed in the mounting shell (203).

2. A distributed multi-region flue gas velocity flow measurement device according to claim 1, characterized in that: A through opening (205) is provided at a position near the dust filter plate (202) at the bottom of the installation tube (2); the through opening (205) is arranged on a side of the dust filter plate (202) near the scraper (301); a dust collecting shell (206) in communication with the through opening (205) is fixedly connected to the bottom of the installation tube (2); a sealing plug (207) is installed at the opening at the lower end of the dust collecting shell (206).

3. A distributed multi-region flue gas velocity flow measurement device according to claim 2, characterized in that: The dust collecting shell (206) is laterally provided with a slot near the opening (205), a blocking plate (208) is inserted into the slot, and one end of the blocking plate (208) located inside the dust collecting shell (206) is fixedly connected to a limiting strip (209).

4. A distributed multi-region flue gas velocity flow measurement device according to claim 3, characterized in that: The limiting strip (209) is a triangular plate.

5. A distributed multi-region flue gas velocity flow measurement device according to claim 1, characterized in that: The dust filter plate (202) is a conical filter cartridge.

6. A distributed multi-region flue gas velocity flow measurement device according to claim 1, characterized in that: The scraper (301) is provided with an inclined surface (3011) for providing power to the rotating shaft (3).

7. A distributed multi-region flue gas velocity flow measurement device according to claim 1, characterized in that: It also comprises a heat exchange tube (4), which is installed in the installation tube (2) via a mounting block and is located between the rotating shaft (3) and the flow meter (201).

8. A distributed multi-region flue gas velocity flow measurement device according to claim 7, characterized in that: The heat exchange tube (4) is spirally spiraled inside the installation tube (2).

9. A method for measuring the flow velocity of flue gas, using the distributed multi-region flue gas flow velocity measurement device according to claim 1, characterized in that: The main steps include: S1: Fix the installation pipe (2) to the flue gas branch pipe (1) via a flange to ensure a tight connection to prevent flue gas leakage; S2: Check whether all components are firmly installed and connected properly, calibrate the flow meter (201) and the speed sensor (204) to ensure that the measurement data is accurate and reliable, and confirm that the dust filter plate (202) is clean and not blocked; S3: The flue gas flows from the flue gas branch pipe (1) into the installation pipe (2), and first passes through the dust filter plate (202), which intercepts impurities such as dust in the flue gas; S4: When the smoke continues to flow through the dust filter plate (202) in the installation tube (2), the driving blade (302) is impacted by the flowing smoke and drives the rotating shaft (3) to rotate, thereby driving the scraper (301) to rotate on the dust filter plate (202) to scrape off the dust attached to the dust filter plate (202); S5: At the same time, the rotating shaft (3) also drives the impeller (303) to rotate. Since the rotation speed of the impeller (303) is proportional to the wind speed, the speed sensor (204) can obtain the current flow rate data of the smoke by measuring and calculating the rotation speed of the impeller (303). When the smoke passes through the flow meter (201), the flow meter (201) will measure the flow rate of the smoke again. S6: By comparing and analyzing the data measured by the velocity sensor (204) and the impeller (303) with the data measured by the flow meter (201) through the host, relatively accurate flue gas velocity and flow rate data can be obtained.

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