Anti-interference flue gas component measuring device

Abstract

The utility model provides an anti-interference type flue gas component measuring device which comprises a flue and a gas analyzer, a connecting pipe is fixedly installed on one side of the gas analyzer, a piston plate is movably installed in the middle of the interior of the connecting pipe in an embedded mode, and a second spring piece is fixedly installed on one side of the piston plate. Flue gas can be filtered through the filter plates, impurities such as dust and water vapor in the flue gas can be blocked, the impurities are prevented from being attached to the surface of a sensor of the gas analyzer, the measurement accuracy is guaranteed, meanwhile, the servo motor drives the rotating disc to regularly rotate by a certain angle, the multiple filter plates can be alternately used, and the measurement accuracy is improved. In different time periods and under the condition that the flue gas impurity concentration is different, each filter plate can uniformly undertake the filtering work, and the condition that a certain filter plate is saturated too early due to excessive impurities is avoided, so that the overall service life of the filter plate is prolonged, the trouble of frequently replacing a filter part is reduced, and the stability and the reliability of the measuring device are improved.

Description

Technical Field

[0001] This utility model relates to the field of flue gas detection, specifically an anti-interference flue gas composition measuring device. Background Technology

[0002] In industrial production, measuring the composition of flue gas is a key step in ensuring combustion efficiency and controlling pollutant emissions. Currently, most common flue gas composition measuring devices on the market use technologies such as spectral analysis and electrochemical sensing. These devices can resist the adverse effects of electromagnetic interference, high temperature and high pressure in the flue gas environment, and determine the content of various gases in the flue gas, such as oxygen, carbon dioxide, sulfur dioxide, and nitrogen oxides, through spectral analysis and electrochemical sensing.

[0003] Since flue gas typically contains impurities such as dust and water vapor, these substances often adhere to the sensor surface of measuring equipment. This adhesion affects the sensitivity and accuracy of the sensor, leading to deviations in the measurement data. During continuous monitoring of flue gas components, as dust and water vapor accumulate, the sampling pipeline will gradually become clogged. This clog not only reduces sampling efficiency but may also cause interruptions in the measurement process, thereby reducing the detection efficiency of the equipment.

[0004] Therefore, we provide an interference-resistant flue gas composition measurement device. Utility Model Content

[0005] The main objective of this invention is to provide an anti-interference flue gas composition measuring device, which can effectively solve the problem mentioned in the background art that flue gas usually contains impurities such as dust and water vapor. These substances often adhere to the sensor surface of the measuring device, and this adhesion phenomenon affects the sensitivity and accuracy of the sensor.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] An anti-interference flue gas composition measuring device includes a flue and a gas analyzer. A connecting pipe is fixedly installed on one side of the gas analyzer. A piston plate is movably installed inside the connecting pipe. A spring is fixedly installed on one side of the piston plate, and one end of the piston plate is fixedly connected to the connecting pipe. A closed diaphragm is fixedly installed in the middle of the piston plate. An air passage box is provided between the connecting pipe and the flue. A servo motor is fixedly installed on one side of the air passage box. A rotating disk is nested and fixedly installed on the drive shaft of the servo motor. A filter plate for filtration is installed in the middle of the rotating disk. The rotating disk is located between the air passage box and the connecting pipe to allow air passage between them. An exhaust plate is fixedly installed on one side of the piston plate, and a pressure valve is installed in the middle of the exhaust plate. An exhaust hole is provided on one side of the piston plate, and the exhaust hole is air-connected to the pressure valve.

[0008] In the above scheme, preferably, the upper and lower ends of the air box are respectively fixedly installed with an exhaust pipe and an intake pipe for exhausting and intakeing air, and the exhaust pipe and intake pipe are both fixedly installed through one side of the flue.

[0009] In the above scheme, preferably, an electric air pump for sucking up flue gas is fixedly installed at one end of the air inlet pipe, and both the air inlet pipe and the exhaust pipe are connected to the air passage box.

[0010] In the above scheme, preferably, an exhaust groove is provided on the upper side of the air box, and the exhaust groove is connected to the exhaust pipe. An air passage is provided inside the exhaust plate, and the pressure valve is connected to the exhaust groove through the air passage.

[0011] In the above scheme, preferably, an airtight head is fitted and movably installed on one side of the pressure valve, a spring element is fixedly installed on one side of the airtight head, and the other side of the spring element is fixedly connected to the other side of the pressure valve.

[0012] In the above scheme, preferably, the servo motor is set to periodically start and rotate 90 degrees, and the rotating disk is driven by the servo motor to fit between the connecting pipe and the air box.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] (1) This anti-interference flue gas composition measuring device is equipped with a rotating disk and filter plates. The filter plates can filter the flue gas, blocking impurities such as dust and water vapor, preventing these impurities from adhering to the sensor surface of the gas analyzer, thus ensuring the accuracy of the measurement. At the same time, the servo motor drives the rotating disk to rotate at a certain angle periodically, so that multiple filter plates can be used alternately. Under different time periods and different flue gas impurity concentrations, each filter plate can evenly undertake the filtration work, avoiding premature saturation of a certain filter plate due to excessive impurities, thereby extending the overall service life of the filter plate, reducing the trouble of frequently replacing filter components, and improving the stability and reliability of the measuring device.

[0015] (2) This anti-interference flue gas composition measuring device is equipped with a piston plate, an exhaust plate and a pressure valve. When the electric air pump draws flue gas, the piston plate, under the action of air pressure, causes the flue gas to break through the closed membrane and enter one side. At this time, the pressure valve is closed under the action of the airtight head and the spring to prevent the flue gas to be tested from being discharged prematurely. After the test is completed, the gas on one side of the piston plate increases with the pressure, pushing the airtight head to open the pressure valve. The tested flue gas is discharged through the exhaust plate. After the piston plate moves and discharges the gas, it rebounds under the action of the spring. At the same time, the exhaust plate re-intakes gas to realize the automated cycle of flue gas entry and exit and detection. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0018] Figure 2 This is a schematic diagram of the connection structure of the exhaust plate in this utility model.

[0019] Figure 3 This is a partial structural diagram of the exhaust hole and exhaust groove in this utility model.

[0020] Figure 4 This is a partial cross-sectional view of the connecting pipe and the air passage box in this utility model.

[0021] Figure 5 This is a partial planar schematic diagram of the pressure valve in this utility model.

[0022] Figure 6This is a partial structural diagram of the closure membrane in this utility model.

[0023] Figures 1-6 In the middle: 1. Flue; 2. Gas analyzer; 3. Gas box; 301. Exhaust trough; 4. Connecting pipe; 401. Exhaust plate; 4011. Pressure valve; 4012. Airtight head; 4013. Spring component one; 402. Exhaust port; 403. Spring component two; 404. Piston plate; 405. Closing diaphragm; 5. Rotary disc; 6. Filter plate; 7. Exhaust pipe; 8. Servo motor; 9. Electric air pump; 10. Inlet pipe. Detailed Implementation

[0024] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0025] like Figures 1-6 As shown, in this embodiment, an anti-interference flue gas composition measuring device includes a flue 1 and a gas analyzer 2. A connecting pipe 4 is fixedly installed on one side of the gas analyzer 2. A piston plate 404 is movably installed inside the connecting pipe 4. A spring element 403 is fixedly installed on one side of the piston plate 404, and one end of the piston plate 404 is fixedly connected to the connecting pipe 4. A closing membrane 405 is fixedly installed in the middle of the piston plate 404. An air passage box 3 is provided between the connecting pipe 4 and the flue 1, and a servo motor 8 is fixedly installed on one side of the air passage box 3. The drive shaft of the servo motor 8 is embedded with... A rotating disk 5 is fixedly installed, and a filter plate 6 for filtration is fitted in the middle of the rotating disk 5. The rotating disk 5 is located between the air box 3 and the connecting pipe 4 to allow air communication between the two. An exhaust plate 401 is fixedly installed on one side of the piston plate 404, and a pressure valve 4011 is fitted in one side of the exhaust plate 401. An exhaust hole 402 is provided on one side of the piston plate 404, and the exhaust hole 402 is connected to the pressure valve 4011 in an air communication manner. The servo motor 8 is set to start rotating 90 degrees periodically, and the rotating disk 5 is fitted in between the connecting pipe 4 and the air box 3 by rotating and being driven by the servo motor 8.

[0026] Specifically, with this setup, during use, when the flue gas in the inlet pipe 10 is introduced into the connecting pipe 4 through the air passage box 3, the rotating disk 5 between the air passage box 3 and the connecting pipe 4 provides airtight communication, and the flue gas is filtered by the filter plate 6 in the middle of the rotating disk 5 to ensure the purity of the flue gas. Under the continuous operation of the electric air pump 9, due to the higher air pressure on the other side of the piston plate 404, the filtered flue gas breaks through the closed membrane 405 and enters one side of the piston plate 404. At this time, the gas on one side of the piston plate 404 cannot be blocked by the airtight head 4012 and the spring member 4013. The gas enters the exhaust plate 401 through the exhaust port 402 and pressure valve 4011 to prevent the flue gas to be tested from being discharged from the exhaust slot 301 and exhaust pipe 7 through the exhaust channel. Under the continuous operation of the electric air pump 9, the air pressure on both sides of the piston plate 404 gradually tends to balance. At this time, the gas is analyzed by the gas analyzer 2 (due to the absorption characteristics of gas molecules to infrared light of specific wavelengths, when infrared light passes through the gas being tested, specific components in the gas will absorb infrared light of the corresponding wavelength, resulting in a decrease in light intensity. By detecting the change in light intensity and according to the Lambert-Beer law, the concentration of non-infrared gases in the flue gas can be calculated). (The gas analyzer 2 is existing technology and will not be described in detail here.) It operates to detect the components and concentrations in the flue gas. After the flue gas detection is completed, under the continuous pressurization as the air pressure on both sides of the piston plate 404 gradually approaches equilibrium, the gas on one side of the piston plate 404 pushes the airtight head 4012 to contract inward in the pressure valve 4011, thereby releasing the pressure and allowing the detected flue gas to be smoothly discharged through the exhaust plate 401. After the filter plate 6 filters the flue gas between the air passage box 3 and the connecting pipe 4 for a period of time, it is pneumatically rotated by the servo motor 8 at a certain angle. Another rotating disk 5 is inserted between the air passage box 3 and the connecting pipe 4 to switch the filter plate 6 to filter the flue gas. The rotating disk 5 between the air passage box 3 and the connecting pipe 4 is switched by the periodic start of the servo motor 8. Thus, the filter plate 6 is switched to use under different time periods and different impurity concentrations in the flue gas. This prevents a certain filter plate 6 from becoming saturated too early when there are too many impurities in the flue gas, so that each filter plate 6 can filter the flue gas evenly. After the servo motor 8 rotates the rotating disk 5 a certain number of times, the filter plate 6 in the rotating disk 5 is replaced.

[0027] like Figures 1-4 As shown, in this embodiment, exhaust pipe 7 and air inlet pipe 10 for exhaust and air intake are respectively fixedly installed at the upper and lower ends of the air box 3. Both exhaust pipe 7 and air inlet pipe 10 are fixedly installed through one side of the flue 1. An electric air pump 9 for sucking up the flue gas in the flue 1 is fixedly installed at one end of the air inlet pipe 10. Both the air inlet pipe 10 and exhaust pipe 7 are connected through the air box 3.

[0028] Specifically, with this setup, during use, the operation of the electric air pump 9 draws the flue gas in the flue 1 into the air inlet pipe 10, and then the gas is transported to the air passage box 3 through the air inlet pipe 10. At this time, the flue gas is filtered through the filter plate 6 between the air passage box 3 and the connecting pipe 4, and then the filtered flue gas is transported to the connecting pipe 4 so that the gas analyzer 2 can detect the gas composition of the flue gas, thereby preventing more impurities in the flue gas from adhering to the gas analyzer 2. After the flue gas composition is detected, the flue gas is connected to the exhaust pipe 7 through the exhaust groove 301 and discharged into the flue 1.

[0029] like Figures 3-6 As shown, in this embodiment, an exhaust groove 301 is provided on the upper side of the air box 3, and the exhaust groove 301 is connected to the exhaust pipe 7. An air passage is provided inside the exhaust plate 401, and the pressure valve 4011 is connected to the exhaust groove 301 through the air passage. An airtight head 4012 is movably installed inside the pressure valve 4011. A spring member 4013 is fixedly installed on one side of the airtight head 4012, and the other side of the spring member 4013 is fixedly connected to the other side of the pressure valve 4011.

[0030] Specifically, with this configuration, when the gas pressure on one side of the piston plate 404 is released, the gas on that side pushes the airtight head 4012 to contract inward within the pressure valve 4011. This causes the gas on one side of the piston plate 404 to flow into the gas passage of the exhaust plate 401 through the exhaust port 402 and the pressure valve 4011, and then be discharged through the exhaust groove 301 and the exhaust pipe 7. When the airtight head 4012 contracts, the gas on one side of the piston plate 404 is instantaneously discharged. At this time, the gas pressure on the other side of the piston plate 404 is greater than that on one side, allowing the gas to flow into the exhaust port 404. The pressure difference creates a pressure difference. Since the closed membrane 405 cannot instantly expel the gas from the other side of the piston plate 404, the gas on the other side pushes the piston plate 404 to one side to expel the detected flue gas from the exhaust port 402. Subsequently, as the gas pressure on one side of the piston plate 404 decreases, the gas on one side of the piston plate 404 flows back into one side of the piston plate 404 through the closed membrane 405. At the same time, the piston plate 404 rebounds to the middle position of the connecting pipe 4 under the action of the spring member 403, completing one cycle and preparing for the next round of testing.

[0031] Working principle: Through the operation of the electric air pump 9, the flue gas in the flue 1 is drawn into the inlet pipe 10 and transported to the air passage box 3. Under the action of the filter plate 6 between the air passage box 3 and the connecting pipe 4, the flue gas is filtered and then transported to the connecting pipe 4 for the gas analyzer 2 to detect the flue gas composition. This process helps prevent excessive adhesion of impurities in the flue gas to the gas analyzer 2. After the detection is completed, the flue gas is discharged back into the flue 1 through the connection between the exhaust groove 301 and the exhaust pipe 7. During the process of introducing flue gas into the connecting pipe 4, the rotating disk 5 between the air passage box 3 and the connecting pipe 4 ensures airtight connection and facilitates the flow of flue gas. The filter plate 6 further filters the flue gas to ensure its purity. Under the continuous action of the electric air pump 9, the gas on one side of the piston plate 404, under the action of the airtight head 4012 and the spring 4013, cannot enter the air passage of the exhaust plate 401 through the exhaust hole 402 and the pressure valve 4011, thus preventing the flue gas to be tested from being discharged from the exhaust groove 301 and the exhaust pipe 7 through the air passage. As the electric air pump 9 continues to operate, the air pressure on both sides of the piston plate 404 gradually tends to balance, and the gas analyzer 2 starts to operate to detect the components and concentrations in the flue gas. After the detection is completed, the gas on one side of the piston plate 404 pushes the airtight head 4012. 012 contracts inward in pressure valve 4011, releasing pressure and allowing the detected flue gas to pass smoothly through exhaust plate 401. When the gas pressure on one side of piston plate 404 is released, the gas on the other side pushes piston plate 404 to one side, discharging the detected flue gas from exhaust port 402. Subsequently, the gas on one side of piston plate 404 flows back into one side of piston plate 404 through closing membrane 405. At the same time, under the action of spring element 403, piston plate 404 rebounds to the middle position of connecting pipe 4, completing one cycle and preparing for the next round of detection. Filter plate 6 is located between air passage box 3 and connecting pipe 4. After filtering for a period of time, the servo motor 8 will start periodically and rotate at a certain angle to switch to another rotating disk 5 embedded between the air passage box 3 and the connecting pipe 4, so that another filter plate 6 filters the flue gas. Through the periodic start of the servo motor 8, the rotating disk 5 switches between the air passage box 3 and the connecting pipe 4, so that the filter plate 6 can be used alternately under different time periods and flue gas impurity concentrations, preventing a certain filter plate 6 from becoming saturated with filtration too early due to excessive flue gas impurities. In this way, each filter plate 6 can filter the flue gas evenly. When the servo motor 8 rotates the rotating disk 5 a certain number of times, the filter plate 6 will be replaced.

[0032] It should be noted that when switching the rotating disk 5 between the air passage box 3 and the connecting pipe 4, the electric air pump 9 stops operating to prevent a large amount of flue gas from overflowing from the gap between the air passage box 3 and the connecting pipe 4 when switching the rotating disk 5.

[0033] The preferred embodiments of the present invention disclosed above are merely illustrative of the present invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the present invention to specific implementations. The present invention is not limited to the above embodiments; the embodiments and descriptions in the specification are merely outlining the principles of the present invention. Various changes and modifications can be made to the present invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A device for measuring the composition of flue gases, which is resistant to interference, comprising a flue (1) and a gas analyser (2), characterised in that: A connecting pipe (4) is fixedly installed on one side of the gas analyzer (2). A piston plate (404) is movably installed inside the connecting pipe (4). A spring element (403) is fixedly installed on one side of the piston plate (404), and one end of the piston plate (404) is fixedly connected to the connecting pipe (4). A closing membrane (405) is fixedly installed in the middle of the piston plate (404). An air passage box (3) is provided between the connecting pipe (4) and the flue (1), and a servo motor (8) is fixedly installed on one side of the air passage box (3). A rotating disk (5) is nested and fixedly installed on the drive shaft of the servo motor (8), and a filter plate (6) for filtration is fitted in the middle of the rotating disk (5). The rotating disk (5) is located between the air box (3) and the connecting pipe (4) so ​​that the two are connected by air. An exhaust plate (401) is fixedly installed on one side of the piston plate (404), and a pressure valve (4011) is fitted on one side of the exhaust plate (401). An exhaust hole (402) is provided on one side of the piston plate (404), and the exhaust hole (402) is connected to the pressure valve (4011) by air.

2. The anti-interference flue gas component measuring device according to claim 1, characterized in that, The upper and lower ends of the air passage box (3) are respectively fixedly installed with an exhaust pipe (7) and an air inlet pipe (10) for exhaust and air inlet, and the exhaust pipe (7) and the air inlet pipe (10) are both fixedly installed through one side of the flue (1).

3. The interference-resistant flue gas component measuring device according to claim 2, characterized by An electric air pump (9) for sucking up the flue gas in the flue (1) is fixedly installed at one end of the air inlet pipe (10), and both the air inlet pipe (10) and the exhaust pipe (7) are connected to the air box (3).

4. The interference-resistant flue gas component measuring device according to claim 1, characterized by The air box (3) has an exhaust groove (301) on one side above, and the exhaust groove (301) is connected to the exhaust pipe (7). The exhaust plate (401) has an air passage, and the pressure valve (4011) is connected to the exhaust groove (301) through the air passage.

5. The interference-resistant flue gas component measuring device according to claim 4, characterized by An airtight head (4012) is movably fitted inside one side of the pressure valve (4011). A spring element (4013) is fixedly installed on one side of the airtight head (4012), and the other side of the spring element (4013) is fixedly connected to the other side of the pressure valve (4011).

6. The interference-resistant flue gas component measuring device according to claim 1, characterized by The servo motor (8) is set to rotate 90 degrees periodically, and the rotating disk (5) is installed between the connecting pipe (4) and the air box (3) by rotating and fitting under the drive of the servo motor (8).

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