Flue gas pollutant emission monitoring equipment

Abstract

The utility model relates to the technical field of flue gas monitoring, and particularly discloses flue gas pollutant emission monitoring equipment, which comprises a shell, a gas chamber is arranged in the shell, a monitoring module is arranged in the shell, the monitoring module is connected with an exhaust pipe, the monitoring module is connected with a control panel, the monitoring module is communicated with the gas chamber through a first gas outlet pipe, and the gas chamber is communicated with the control panel through a second gas outlet pipe. When smoke pollutants are monitored to exceed a threshold value, the intermittent monitoring mode can be switched to, and the device can carry out transient monitoring according to a preset time interval instead of continuous monitoring. The monitoring module is switched to the continuous monitoring mode until the pollutants are reduced to be below the threshold value, so that the core monitoring element of the monitoring module can be prevented from being exposed in the high-concentration pollutants for a long time even if the pollution exceeds the standard, and the service life of equipment can be remarkably prolonged on the premise of not sacrificing the monitoring precision.

Description

Technical Field

[0001] The utility model relates to the technical field of flue gas monitoring, and specifically designs a flue gas pollutant emission monitoring device. Background Art

[0002] Due to the long-term reliance on coal as the main source of energy, a large amount of harmful gases and particulate matter has been emitted, causing serious air quality problems. In order to strengthen environmental protection and reduce pollution, it is necessary to use monitoring equipment to continuously monitor emissions from fixed pollution sources, such as sulfur dioxide, nitrogen oxides and particulate matter, which will help environmental protection agencies understand the emission of pollutants in real time and ensure that emission standards are complied with.

[0003] The flue gas pollutant emission monitoring equipment in the prior art usually includes three modules: continuous monitoring, data recording and alarm function. Among them, continuous monitoring refers to continuous and real-time automatic monitoring of flue gas pollutant emissions. However, once the pollutant emission exceeds the threshold set by the alarm module, continuous monitoring must be ensured, which will cause the core components of the monitoring equipment to be exposed to high concentrations of harmful substances for a long time, thereby accelerating the aging and damage of the components and shortening the service life of the entire equipment. Based on this, the inventor purposefully provides a flue gas pollutant emission monitoring device that automatically switches to intermittent monitoring mode when the pollutant emissions exceed the standard. Utility Model Content

[0004] The purpose of the utility model is to address the deficiencies of the prior art and provide a flue gas pollutant emission monitoring device that automatically switches to an intermittent monitoring mode when pollutant emissions exceed the standard, so as to solve the problems in the prior art.

[0005] The purpose of the utility model can be achieved through the following technical solutions:

[0006] A flue gas pollutant emission monitoring device comprises a shell, an air chamber is opened in the shell, a monitoring module is arranged in the shell, the monitoring module is connected to the exhaust pipe, the monitoring module is connected to the control board, the monitoring module is communicated with the air chamber through a first air outlet pipe, the air chamber is communicated with the air inlet pipe, the air chamber is communicated with two second air outlet pipes, a rotating shaft is rotatably installed in the air chamber, an output source for driving the air chamber to rotate intermittently is arranged in the shell, the output source is connected to the control board, two arc plates are fixedly installed on the rotating shaft, the two arc plates are fitted with the inner wall of the air chamber, when the pollutant emission exceeds a threshold value, it switches to an intermittent monitoring mode, the control board controls the intermittent rotation of the rotating shaft through the output source, drives the arc plate to intermittently block the first air outlet pipe, when the pollutant emission is lower than the threshold value, it switches to a continuous monitoring mode, the control board controls the rotating shaft through the output source to rotate until the two arc plates block the two second air outlet pipes.

[0007] As a further optimization or improvement of this solution.

[0008] The horizontal height of the air inlet pipe is higher than the horizontal height of the first air outlet pipe, and the horizontal height of the first air outlet pipe is consistent with the horizontal heights of the two second air outlet pipes.

[0009] As a further optimization or improvement of this solution.

[0010] Two electrostatic dust removal components are embedded on the inner wall of the air chamber, and the two electrostatic dust removal components are arranged in a circle, and the electrostatic dust removal components are connected to the control board.

[0011] As a further optimization or improvement of this solution.

[0012] A filter screen is arranged in the first air outlet pipe.

[0013] As a further optimization or improvement of this solution.

[0014] A temporary storage groove is provided in each of the arc-shaped plates, and an elastic scraper is fixedly connected in the temporary storage groove. One end of the elastic scraper is in contact with the arc surface of the electrostatic dust removal component and the filter screen.

[0015] As a further optimization or improvement of this solution.

[0016] The air chamber bottom plate is provided with a plurality of discharge holes, and when the arc-shaped plate rotates intermittently, the temporary storage grooves are intermittently aligned with the discharge holes.

[0017] As a further optimization or improvement of this solution.

[0018] The bottoms of the two arc-shaped plates are connected by an arc-shaped strip, the arc-shaped strip is fitted with the bottom plate of the air chamber, and the width of the arc-shaped strip is not less than the width of the discharge hole.

[0019] Beneficial effects of the utility model:

[0020] 1. The utility model sets an intermittent monitoring mode. When it is detected that the flue gas pollutants exceed the threshold, it will switch to this mode. In this mode, the equipment will perform short-term monitoring at preset time intervals instead of continuous monitoring until the pollutants are reduced below the threshold and then switch back to the continuous monitoring mode. In this way, even if the pollution exceeds the standard, the core monitoring elements of the monitoring module can be avoided from being exposed to high concentrations of pollutants for a long time, preventing them from being damaged by long-term exposure. In this way, the core monitoring elements can be protected without sacrificing the monitoring accuracy, and the service life of the equipment can be significantly extended.

[0021] 2. The utility model provides an electrostatic dust removal component and a filter. In the continuous monitoring mode, after the flue gas enters the air chamber, the dust therein will be captured by the electrostatic dust removal component to achieve primary dust removal, which can prevent particulate matter and other impurities from entering the sensitive components of the monitoring equipment. When the flue gas is about to pass through the first exhaust pipe into the monitoring module, the filter can perform secondary dust removal on the flue gas to filter out interfering substances in the flue gas, which can ensure that the monitoring equipment can more accurately measure the concentration of pollutants, thereby improving the reliability of the data.

[0022] 3. In the intermittent monitoring mode, when the arc plate rotates, the elastic scraper on the temporary storage tank inside the utility model will abut against the electrostatic dust removal component, thereby scraping off the dust on the dust collecting electrode and the discharge electrode. At the same time, the elastic scraper will also scrape off the impurities on the filter net, and the scraped dust will fall into the temporary storage tank, which will not affect the rotation of the arc plate. When the temporary storage tank is aligned with the discharge hole, the dust in the temporary storage tank is discharged through the discharge hole, avoiding the accumulation of impurities in the air chamber, which not only improves the filtering effect on the flue gas, but also ensures the smoothness of the flue gas circulation. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The utility model is further described below in conjunction with the accompanying drawings.

[0024] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0025] Figure 2 It is a schematic diagram of the shell cross-section structure.

[0026] Figure 3 It is a schematic diagram of the elastic scraper structure.

[0027] Figure 4 Schematic diagram of the discharge hole structure.

[0028] The figure shows:

[0029] 1. Shell; 2. Air inlet pipe; 3. Second air outlet pipe; 4. First air outlet pipe; 5. Monitoring module; 6. Air chamber; 7. Rotating shaft; 8. Curved plate; 9. Temporary storage tank; 10. Curved strip; 11. Elastic scraper; 12. Filter; 13. Electrostatic dust removal component; 14. Discharge hole. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] See also Figure 1-Figure 4 , a flue gas pollutant emission monitoring device, which includes a shell 1, an air chamber 6 is opened in the shell 1, a monitoring module 5 is arranged in the shell 1, the monitoring module 5 is connected to the exhaust pipe, the monitoring module 5 is connected to the control board, the monitoring module 5 is communicated with the air chamber 6 through the first outlet pipe 4, the air chamber 6 is communicated with the air inlet pipe 2, the air chamber 6 is communicated with the two second outlet pipes 3, a rotating shaft 7 is rotatably installed in the air chamber 6, an output source for driving the air chamber 6 to rotate intermittently is arranged in the shell 1, the output source is connected to the control board, two arc plates 8 are fixedly installed on the rotating shaft 7, the two arc plates 8 are in contact with the inner wall of the air chamber 6, when the pollutant emission exceeds the threshold value, it switches to the intermittent monitoring mode, the control board controls the rotating shaft 7 to rotate intermittently through the output source, drives the arc plate 8 to intermittently block the first outlet pipe 4, when the pollutant emission is lower than the threshold value, it switches to the continuous monitoring mode, the control board controls the rotating shaft 7 to rotate to the two arc plates 8 to block the two second outlet pipes 3 through the output source.

[0032] In a specific embodiment, the output source can be set to a servo motor, a fan is provided on the second air outlet pipe 3, the monitoring module 5 includes a data collection and processing unit, various gas pollutant sensors, an alarm module, etc., and the control board is a PLC control system board. The above components are all prior art. The specific models are not disclosed in the utility model, which does not affect the integrity of the utility model.

[0033] The working principle of the utility model is as follows: the housing 1 is installed in the monitoring area. In the continuous monitoring mode, the two arc plates 8 block the second air outlet pipe 3, and the smoke enters the air chamber 6 through the air inlet pipe 2, and then enters the monitoring module 5 through the first air outlet pipe 4. The control board detects the smoke through the built-in particle sensor and various gas pollutant sensors of the monitoring module 5. If the detection result is lower than the threshold, the smoke is discharged through the exhaust pipe, and everything is normal. When the detection result exceeds the threshold, the control board immediately controls the monitoring module 5 to start the alarm module and switches to the intermittent monitoring mode, and drives the converter through the output source. The shaft 7 rotates intermittently, and each rotation is 90 degrees. The shaft 7 will drive the two arc plates 8 to rotate until the first air outlet pipe 4 is blocked. At this time, the two second air outlet pipes 3 will be opened, and the highly polluted flue gas will be directly discharged through the second air outlet pipes 3 and will not enter the monitoring module 5. After a preset time, the shaft 7 will rotate again, and the two arc plates 8 will block the second air outlet pipes 3, while the first air outlet pipe 4 will be opened, and the highly polluted flue gas will enter the monitoring module 5 again for detection, thereby performing intermittent monitoring until the monitoring module 5 detects that the flue gas pollution level is lower than the threshold value, and then switches to the continuous monitoring mode.

[0034] In the intermittent monitoring mode, the device will perform short-term monitoring at preset time intervals instead of continuous monitoring. In this way, even when the pollution exceeds the standard, the core monitoring elements of the monitoring module 5 can be prevented from being exposed to high concentrations of pollutants for a long time and prevented from being damaged by long-term exposure. In this way, the core monitoring elements can be protected without sacrificing monitoring accuracy, significantly extending the service life of the equipment.

[0035] Specifically, the horizontal height of the air inlet pipe 2 is higher than the horizontal height of the first air outlet pipe 4 , and the horizontal height of the first air outlet pipe 4 is consistent with the horizontal height of the two second air outlet pipes 3 .

[0036] In a specific embodiment, when the horizontal height of the air inlet pipe 2 is higher than that of the first air outlet pipe 4 and the second air outlet pipe 3, it can be ensured that in the intermittent monitoring mode, the two arc plates 8 will not block the air inlet pipe 2 when they rotate intermittently, thereby ensuring that there is always sufficient smoke in the air chamber 6. In this way, when the first air outlet pipe 4 is opened, the smoke can immediately pass through the first air outlet pipe 4 into the monitoring module 5 for detection, avoiding the problem of slow speed of smoke introduction into the monitoring module 5 and insufficient amount of smoke introduced due to blocking the air inlet pipe 2.

[0037] More specifically, two electrostatic precipitator components 13 are embedded on the inner wall of the air chamber 6, and the two electrostatic precipitator components 13 are arranged in a circle, and the electrostatic precipitator components 13 are connected to the control board.

[0038] In a specific embodiment, the electrostatic dust removal assembly 13 includes a discharge electrode and a dust collecting electrode, and the discharge electrode and the dust collecting electrode are symmetrically distributed in the air chamber 6. The above components are all prior arts. The specific models are not disclosed in the utility model, which does not affect the integrity of the utility model.

[0039] A high-voltage electric field is formed in the air chamber 6 through the electrostatic dust removal component 13. When the flue gas enters the air chamber 6, the particulate matter in the flue gas will be negatively charged. Under the action of the electric field force, the negatively charged dust particles will move toward the electrode with the opposite charge to their own charge, and finally be adsorbed on the dust collecting electrode, thereby performing electrostatic dust removal on the flue gas, which can prevent dust particles from entering the sensitive components of the monitoring equipment.

[0040] Meanwhile, it should be noted that a filter screen 12 is disposed in the first air outlet pipe 4 .

[0041] In a specific embodiment, through the setting of the filter net 12, the flue gas about to enter the monitoring module 5 can be filtered again, and the impurities and dust particles in the flue gas can be further filtered. The synergistic effect of the filter net 12 and the electrostatic dust removal component 13 not only improves the overall dust removal efficiency, but also provides a double guarantee for the stable operation of the monitoring module 5, effectively improving the accuracy of the monitoring data and extending the life of the equipment.

[0042] More specifically, each of the arc-shaped plates 8 is provided with a temporary storage groove 9 , and an elastic scraper 11 is fixedly connected to the temporary storage groove 9 . One end of the elastic scraper 11 abuts against the arc surface of the electrostatic dust removal component 13 and the filter screen 12 .

[0043] In a specific embodiment, in the air chamber 6, as the dust particles continue to accumulate on the electrostatic dust removal component 13, they will form a dust layer, and in the intermittent monitoring mode, when the arc plate 8 rotates, the elastic scraper 11 on the temporary storage groove 9 therein will abut against the electrostatic dust removal component 13, thereby scraping off the dust on the collecting electrode and the discharge electrode. At the same time, the elastic scraper 11 will also scrape off the impurities on the filter screen 12, and the scraped dust will fall into the temporary storage groove 9, which will not affect the rotation of the arc plate 8, and at the same time, the electrostatic dust removal component 13 and the filter screen 12 are cleaned to ensure the filtering effect of the two.

[0044] Meanwhile, it should be noted that a plurality of discharge holes 14 are provided on the bottom plate of the air chamber 6 , and when the arc-shaped plate 8 rotates intermittently, the temporary storage groove 9 is intermittently aligned with the discharge holes 14 .

[0045] In a specific embodiment, in the intermittent monitoring mode, as the arc plate 8 rotates, the temporary storage groove 9 will be aligned with the discharge hole 14, and when aligned, the dust in the temporary storage groove 9 will be discharged from the discharge hole 14 into the air chamber 6, thereby achieving the purpose of completely discharging impurities from the air chamber 6.

[0046] More specifically, the bottoms of the two arc-shaped plates 8 are connected by an arc-shaped strip 10 , the arc-shaped strip 10 is in contact with the bottom plate of the air chamber 6 , and the width of the arc-shaped strip 10 is not less than the width of the discharge hole 14 .

[0047] In a specific embodiment, since the arc strip 10 is attached to the bottom plate of the air chamber 6, as the arc plate 8 rotates, when the temporary storage groove 9 is aligned with the discharge hole 14, the arc strip 10 will block the remaining discharge holes 14, thereby preventing smoke from leaking out of the air chamber 6.

[0048] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. A flue gas pollutant emission monitoring device, characterized in that: The invention comprises a shell (1), wherein an air chamber (6) is provided in the shell (1), a monitoring module (5) is arranged in the shell (1), the monitoring module (5) is connected to an exhaust pipe, the monitoring module (5) is connected to a control panel, the monitoring module (5) is communicated with the air chamber (6) through a first air outlet pipe (4), the air chamber (6) is communicated with an air inlet pipe (2), the air chamber (6) is communicated with two second air outlet pipes (3), a rotating shaft (7) is rotatably installed in the air chamber (6), an output source for driving the air chamber (6) to rotate intermittently is arranged in the shell (1), The output source is connected to the control panel, and two arc plates (8) are fixedly mounted on the rotating shaft (7), and the two arc plates (8) are in contact with the inner wall of the air chamber (6). When the pollutant emission exceeds a threshold value, the control panel switches to an intermittent monitoring mode, and the control panel controls the rotating shaft (7) to rotate intermittently through the output source, driving the arc plates (8) to intermittently block the first air outlet pipe (4). When the pollutant emission is lower than the threshold value, the control panel switches to a continuous monitoring mode, and the control panel controls the rotating shaft (7) to rotate through the output source until the two arc plates (8) block the two second air outlet pipes (3).

2. A flue gas pollutant emission monitoring device according to claim 1, characterized in that: The horizontal height of the air inlet pipe (2) is higher than the horizontal height of the first air outlet pipe (4), and the horizontal height of the first air outlet pipe (4) is consistent with the horizontal height of the two second air outlet pipes (3).

3. The flue gas pollutant emission monitoring device according to claim 1, characterized in that: Two electrostatic dust removal components (13) are embedded on the inner wall of the air chamber (6), and the two electrostatic dust removal components (13) are arranged in a circle. The electrostatic dust removal components (13) are connected to the control panel.

4. A flue gas pollutant emission monitoring device according to claim 3, characterized in that: A filter screen (12) is arranged inside the first air outlet pipe (4).

5. A flue gas pollutant emission monitoring device according to claim 4, characterized in that: A temporary storage groove (9) is provided in each of the arc-shaped plates (8), and an elastic scraper (11) is fixedly connected in the temporary storage groove (9), and one end of the elastic scraper (11) abuts against the arc surface of the electrostatic dust removal component (13) and the filter screen (12).

6. A flue gas pollutant emission monitoring device according to claim 5, characterized in that: The bottom plate of the air chamber (6) is provided with a plurality of discharge holes (14). When the arc-shaped plate (8) rotates intermittently, the temporary storage groove (9) is intermittently aligned with the discharge holes (14).

7. A flue gas pollutant emission monitoring device according to claim 6, characterized in that: The bottoms of the two arc-shaped plates (8) are connected by an arc-shaped strip (10), the arc-shaped strip (10) is in contact with the bottom plate of the air chamber (6), and the width of the arc-shaped strip (10) is not less than the width of the discharge hole (14).

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