CN218938063U - Flue gas particulate matter detection device and flue gas particulate matter detection system - Google Patents
Flue gas particulate matter detection device and flue gas particulate matter detection system Download PDFInfo
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- CN218938063U CN218938063U CN202320023968.0U CN202320023968U CN218938063U CN 218938063 U CN218938063 U CN 218938063U CN 202320023968 U CN202320023968 U CN 202320023968U CN 218938063 U CN218938063 U CN 218938063U
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Abstract
The utility model discloses a flue gas particulate matter detection device and a flue gas particulate matter detection system, wherein the flue gas particulate matter detection device comprises: the measuring cavity body is provided with a smoke inlet and a smoke outlet, and the smoke inlet is communicated with the smoke outlet to form a ventilation pipeline; the laser incidence module is used for emitting Gaussian beams; the first detection channel is communicated with the ventilation pipeline, is arranged opposite to the laser incidence module, detects the concentration of group particles in the ventilation pipeline according to scattered light of the Gaussian beams by the group particles in the ventilation pipeline, and outputs a group particle concentration detection signal; the second detection channel is communicated with the ventilation pipeline, is arranged at an angle with the laser incidence module, detects the concentration of single particles in the ventilation pipeline according to scattered light of the single particles to Gaussian beams in the ventilation pipeline, and outputs a single particle concentration detection signal. The utility model aims to solve the problem that the particulate matters in different concentration ranges cannot be accurately monitored.
Description
Technical Field
The utility model relates to the field of flue gas particulate detection, in particular to a flue gas particulate detection device and a flue gas particulate detection system.
Background
Flue gas particulate refers to particulate matter in solid or liquid form in the exhaust gas emitted from a stationary source of pollution. The flue gas particulates are typically discharged into the atmosphere with the exhaust gases, directly affecting the quality of the ambient air. In general, the exhaust gas discharge port is provided with an on-line monitoring device for the concentration of the flue gas particles, and the exhaust gas particle concentration is monitored in real time.
Both the backward light scattering type and the forward light scattering type smoke dust meters monitor the concentration of the particles based on the particle population light scattering principle; the back scattering type smoke dust instrument is generally suitable for the emission concentration exceeding 30mg/m 3 Is generally suitable for the emission concentration of more than 5mg/m 3 Is a medium-high concentration site; for discharge concentrations below 5mg/m 3 In the following sites, the forward light scattering type smoke dust instrument has obvious measurement errors due to weak scattered light signals and insufficient detection signal to noise ratio.
With the continuous improvement of the smoke treatment level, more and more enterprises discharge concentration is reduced to 5mg/m 3 In the following, the problem of the forward light scattering type smoke meter not being able to accurately measure low concentration particulate matter is increasingly apparent.
Disclosure of Invention
The utility model mainly aims to provide a flue gas particulate matter detection device and a flue gas particulate matter detection system, and aims to solve the problem that particulate matters in different concentration ranges cannot be accurately monitored.
In order to achieve the above object, the present utility model provides a flue gas particulate detection device, including:
the measuring cavity body is provided with a smoke inlet and a smoke outlet, and the smoke inlet is communicated with the smoke outlet to form a ventilation pipeline;
the laser incidence module is arranged on the measuring cavity body and is used for emitting Gaussian beams;
the first detection channel is arranged on the measurement cavity body and communicated with the ventilation pipeline, is opposite to the laser incidence module, and is used for detecting the concentration of group particles in the ventilation pipeline according to scattered light of the group particles in the ventilation pipeline on the Gaussian beam and outputting a group particle concentration detection signal;
the second detection channel is arranged on the measurement cavity body and communicated with the ventilation pipeline, the second detection channel is arranged at an angle with the laser incidence module, and the second detection channel is used for detecting the concentration of single particles in the ventilation pipeline according to the scattered light of the Gaussian beam by the single particles in the ventilation pipeline and outputting a single particle concentration detection signal.
Optionally, the laser incidence module includes:
a laser diode for emitting a gaussian beam;
the first diaphragm is arranged opposite to the laser diode, so that the Gaussian beam passes through the first diaphragm and becomes a circular divergent shape;
the first convex lens is opposite to the first diaphragm, and the Gaussian beam is converged by the first convex lens and then output.
Optionally, the first detection channel includes:
the light absorption plate is used for absorbing Gaussian beams directly emitted by the laser incidence module;
the second convex lens is used for converging scattered light passing through the group of particles and outputting the scattered light;
the second diaphragm is arranged opposite to the second convex lens and is used for filtering and outputting scattered light emitted by the second convex lens.
Optionally, the first detection channel further comprises:
the low-pass photoelectric detection module is connected with the second diaphragm and is used for detecting the concentration of group particles in the ventilation pipeline according to scattered light output by the second diaphragm and outputting a group particle concentration detection signal.
Optionally, the low-pass photo-detection module includes:
the first light guide optical fiber is arranged at one end of the first light guide optical fiber corresponding to the second diaphragm;
the input end of the low-pass photoelectric conversion circuit is connected with the other end of the first light guide optical fiber, and the low-pass photoelectric conversion circuit is used for receiving scattered light output by the second diaphragm through the first light guide optical fiber, detecting group particle concentration in the ventilation pipeline according to the scattered light output by the second diaphragm and outputting a group particle concentration detection signal.
Optionally, the second detection channel includes:
the third convex lens is used for converging scattered light passing through the single particles and outputting the scattered light;
the third diaphragm is arranged opposite to the third convex lens and is used for filtering and outputting scattered light emitted by the third convex lens.
Optionally, the two detection channels further include:
the band-pass type photoelectric pulse detection module is connected with the third diaphragm and is used for detecting the concentration of single particles in the ventilation pipeline according to scattered light output by the third diaphragm and outputting a single particle concentration detection signal.
Optionally, the band-pass type photoelectric pulse detection module includes:
one end of the second light guide fiber is arranged corresponding to the third diaphragm;
the input end of the band-pass photoelectric conversion circuit is connected with the other end of the second light guide optical fiber, and the band-pass photoelectric conversion circuit is used for receiving scattered light output by the third diaphragm through the second light guide optical fiber, detecting single-particle concentration in the ventilation pipeline according to the scattered light output by the third diaphragm and outputting a single-particle concentration detection signal.
The utility model also provides a flue gas particulate detection system, which comprises the flue gas particulate detection device.
Optionally, the flue gas particulate detection system further comprises:
the outlet of the air pump is connected with a smoke inlet in the smoke particulate matter detection device, and the air pump is used for sucking smoke from the smoke inlet into a measuring cavity body in the smoke particulate matter detection device.
The utility model forms a flue gas particulate matter detection device through the measurement cavity body, the laser incidence module, the first detection channel and the second detection channel; the measuring cavity body is provided with a smoke inlet and a smoke outlet, and the smoke inlet is communicated with the smoke outlet to form a ventilation pipeline; the laser incidence module can emit Gaussian beams; the first detection channel is arranged on the measurement cavity body and communicated with the ventilation pipeline, is arranged opposite to the laser incidence module, and can detect the concentration of group particles in the ventilation pipeline according to scattered light of the group particles in the ventilation pipeline on Gaussian beams and output a group particle concentration detection signal; the second detection channel is arranged on the measurement cavity body and communicated with the ventilation pipeline, the second detection channel is arranged at an angle with the laser incidence module, and the second detection channel can detect the concentration of single particles in the ventilation pipeline according to the scattered light of the Gaussian beam by the single particles in the ventilation pipeline and output a single particle concentration detection signal. According to the scheme, the group particle concentration and the single particle concentration in the smoke can be detected through the first detection channel and the second detection channel. The utility model aims to solve the problem that the particulate matters in different concentration ranges cannot be accurately monitored.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a front view of an embodiment of a flue gas particulate detection device of the present utility model;
FIG. 2 is a cross-sectional view of an embodiment of the flue gas particulate detection device of the present utility model;
FIG. 3 is a graph of scattering signals of a particle group captured by a first detection channel in an embodiment of a flue gas particulate detection device according to the present utility model;
FIG. 4 is a graph of single particle scattering pulse signals captured by a second detection channel in an embodiment of the apparatus for detecting flue gas particles according to the present utility model;
fig. 5 is a light path diagram of an embodiment of the flue gas particulate detection device of the present utility model.
Reference numerals illustrate:
| reference numerals | Name of the name | Reference numerals | Name of the |
| 10 | |
32 | |
| 20 | |
33 | First light guide |
| 21 | |
40 | |
| 22 | |
41 | |
| 23 | First |
42 | |
| 30 | |
43 | Second light guide |
| 31 | Second |
34 | Light absorbing plate |
The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
It should be noted that, if directional indications (such as up, down, left, right, front, and rear … …) are included in the embodiments of the present utility model, the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.
In addition, if there is a description of "first", "second", etc. in the embodiments of the present utility model, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.
The utility model provides a flue gas particulate matter detection device.
Referring to fig. 1, in an embodiment, the flue gas particulate detection device includes:
a measurement cavity body 10, the measurement cavity body 10 having a flue gas inlet and a flue gas outlet, the flue gas inlet communicating with the flue gas outlet to form a vent conduit;
the laser incidence module 20 is arranged on the measuring cavity body 10, and the laser incidence module 20 is used for emitting Gaussian beams;
a first detection channel 30, where the first detection channel 30 is disposed on the measurement cavity body 10 and is communicated with the air duct, the first detection channel 30 is disposed opposite to the laser incidence module 20, and the first detection channel 30 is configured to detect a group particle concentration in the air duct according to scattered light of the gaussian beam by a group particle in the air duct, and output a group particle concentration detection signal;
the second detection channel 40 is disposed on the measurement cavity body 10 and is communicated with the ventilation pipeline, the second detection channel 40 is disposed at an angle to the laser incidence module 20, and the second detection channel 40 is configured to detect the concentration of single particles in the ventilation pipeline according to the scattered light of the gaussian beam by the single particles in the ventilation pipeline and output a single particle concentration detection signal.
In this embodiment, the ventilation pipeline formed by the connection of the flue gas inlet and the flue gas outlet on the measurement cavity body 10 may be in a straight line, so that the flue gas circulates, and if the measurement cavity is in a curved shape, the detection of the dense fog of the flue gas particulate matter may be affected. The direction of the ventilation duct and the direction of the gaussian light velocity emitted by the laser incidence module 20 can be mutually perpendicular, so that the smoke particulate matter can be prevented from polluting the lens in the smoke particulate matter detection device to the greatest extent. The gas particles in the gas flow through the Gaussian beam emitted by the laser incidence module 20, scattering effect can occur, the scattered light is captured by the first detection channel 30 and the second detection channel 40 respectively, the first detection channel 30 and the second detection channel 40 can respectively detect the group particle concentration and the single particle concentration, the first detection channel 30 detects the group particle concentration, and the second detection channel 40 detects the single particle concentration; the first detection channel 30 may have a first photosensitive region, where the first photosensitive region is a light receiving region of the first detection channel 30, a gaussian beam emitted by the laser incidence module 20, and a smoke intersecting region, and by controlling the volume V1 of the first photosensitive region, V1 satisfies:
and the first detection channel 30 is arranged opposite to the laser incidence module 20, so that particles can pass through the first photosensitive region in the form of particle groups, and thus the concentration of the particles in the first photosensitive region can be detected, and the detected scattering signal diagram of the particle groups can be referred to as fig. 3.
The second detection channel 40 has a second photosensitive region, where the second photosensitive region is a common region where the light receiving region of the second detection channel 40 and the beam waist of the gaussian beam emitted by the laser incident module 20 meet, and by controlling the volume V2 of the second photosensitive region, V2 satisfies:
and the second detection channel 40 is disposed at an angle to the laser incidence module 20, so that the particles can pass through the second photosensitive region in the form of single particles, and thus the concentration of single particles in the second photosensitive region can be detected, and the detected single particle scattering pulse signal diagram can refer to fig. 4.
It can be understood that the concentration of the particulate matters in the group, that is, the concentration of the particulate matters in the middle-high concentration section, can be detected through the first detection channel; the concentration of single particles, namely the concentration of particles in a low concentration section, can be detected through the second detection channel; so the flue gas particulate matter detection device of this scheme alright detect different concentration range's particulate matter.
The utility model forms a flue gas particulate matter detection device through the measurement cavity body 10, the laser incidence module 20, the first detection channel 30 and the second detection channel 40; the measuring cavity body 10 is provided with a smoke inlet and a smoke outlet, and the smoke inlet is communicated with the smoke outlet to form a ventilation pipeline; the laser incidence module 20 may emit a gaussian beam; the first detection channel 30 is arranged on the measurement cavity body 10 and is communicated with the ventilation pipeline, the first detection channel 30 is arranged opposite to the laser incidence module 20, and the first detection channel 30 can detect the concentration of group particles in the ventilation pipeline according to scattered light of the group particles in the ventilation pipeline to Gaussian beams and output a group particle concentration detection signal; the second detection channel 40 is disposed on the measurement cavity body 10 and is communicated with the air duct, the second detection channel 40 is disposed at an angle with the laser incident module 20, and the second detection channel 40 can detect the concentration of single particles in the air duct according to the scattered light of the gaussian beam by the single particles in the air duct and output a single particle concentration detection signal. The group particle concentration and the single particle concentration in the flue gas can be detected through the first detection channel 30 and the second detection channel 40. The utility model aims to solve the problem that the particulate matters in different concentration ranges cannot be accurately monitored.
Referring to fig. 1 to 4, in an embodiment, the laser incidence module 20 includes:
a laser diode 21, the laser diode 21 being configured to emit a gaussian beam;
a first diaphragm 22, where the first diaphragm 22 is disposed opposite to the laser diode 21, so that the gaussian beam passes through the first diaphragm 22 and becomes a circular divergent shape;
the first convex lens 23 is arranged opposite to the first diaphragm 22, and the gaussian beam is converged by the first convex lens 23 and then output.
In this embodiment, the laser diode 21 is configured to emit a gaussian beam, or may emit a laser beam by using another laser, which may be specifically selected according to practical situations; the first diaphragm 22 is arranged opposite to the laser diode 21, so that an elliptical divergent Gaussian beam can be changed into a circular divergent beam after passing through the first diaphragm 22, and the measurement is convenient; the gaussian beam is converged by the first convex lens 23 and then emitted, so that the surface beam is too dispersed, and the measurement result of the concentration of the particulate matters is affected.
Referring to fig. 1 to 4, in an embodiment, the first detection channel 30 includes:
a light absorbing plate 34, wherein the light absorbing plate 34 is used for absorbing Gaussian beams directly emitted by the laser incidence module;
the second convex lens 31 is configured to collect the scattered light passing through the group of particles and output the collected scattered light;
the second diaphragm 32 is disposed opposite to the second convex lens 31, and the second diaphragm 32 is configured to filter and output the scattered light emitted by the second convex lens 31.
In this embodiment, the light absorbing plate 34 may be used as a light trap to absorb the gaussian beam directly emitted from the laser incident module, so as to prevent the direct beam from being too strong and affecting the detection result; the second convex lens 31 can firstly converge scattered light passing through group particles and then output the scattered light, so that inaccurate measurement caused by overhigh beam divergence is prevented, the second diaphragm 32 can be arranged corresponding to the focus of the second convex lens 31, the second diaphragm 32 can filter stray light on the wall surface of the cavity, and the signal to noise ratio is improved, so that the detection module can conveniently detect Gaussian beams, and the concentration of the group particles is obtained.
Referring to fig. 1 to 4, in an embodiment, the first detection channel 30 further includes:
the low-pass photoelectric detection module is connected with the second diaphragm 32, and is used for detecting the concentration of group particles in the ventilation pipeline according to scattered light output by the second diaphragm 32 and outputting a group particle concentration detection signal.
In this embodiment, the low-pass photoelectric detection module may receive the scattered light output by the second diaphragm 32, convert the optical signal into an electrical signal, and output a group particle concentration detection signal according to the electrical signal, for example, the electrical signal may be a voltage signal or a current signal, where the higher the voltage value represented by the voltage signal output by the low-pass photoelectric detection module, the higher the group particle concentration, the lower the voltage value represented by the voltage signal, and the specific correspondence may be set according to practical situations.
Referring to fig. 1 to 4, in an embodiment, the low-pass photo detection module includes:
a first light guiding optical fiber 33, wherein one end of the first light guiding optical fiber 33 is arranged corresponding to the second diaphragm 32;
and a low-pass photoelectric conversion circuit, an input end of which is connected to the other end of the first light guide fiber 33, the low-pass photoelectric conversion circuit being configured to receive the scattered light output from the second diaphragm 32 through the first light guide fiber 33, detect the group particulate matter concentration in the ventilation pipe according to the scattered light output from the second diaphragm 32, and output a group particulate matter concentration detection signal.
In this embodiment, one end of the first light guiding fiber 33 may receive the scattered light output by the second diaphragm 32 and output the scattered light to the low-pass photoelectric conversion circuit through the other end, where the band-pass photoelectric conversion circuit may include a photoelectric sensor to convert an optical signal into an electrical signal, and may further include a processor, where the processor obtains a group particle concentration according to the electrical signal and outputs a group particle concentration detection signal, for example, the higher the electrical signal strength is, the higher the group particle concentration is, the lower the electrical signal strength is, and the specific correspondence may be set according to the actual situation; since the pulse signal of the group particles belongs to a low frequency signal, a band-pass type photoelectric conversion circuit needs to be selected. The group particle concentration detection signal can be output to a server terminal, such as a computer, and the user can query the single particle concentration through the server terminal.
Referring to fig. 1 to 4, in an embodiment, the second detection channel 40 includes:
a third convex lens 41, wherein the third convex lens 41 is used for converging the scattered light passing through the single particles and outputting the scattered light;
and a third diaphragm 42, where the third diaphragm 42 is disposed opposite to the third convex lens 41, and the third diaphragm 42 is configured to filter and output the scattered light emitted by the third convex lens 41.
In this embodiment, the third convex lens 41 may collect the scattered light passing through the single particulate matters and output the scattered light to the third diaphragm 42, so as to prevent inaccurate measurement caused by too high beam divergence, the third diaphragm 42 may be disposed corresponding to an image point of the third convex lens 41, and the third diaphragm 42 may filter stray light on a wall surface of the cavity, so as to improve a signal-to-noise ratio, so that the detection module can detect the gaussian beam conveniently, and thus obtain the concentration of the single particulate matters.
Referring to fig. 1 to 4, in an embodiment, the two detection channels further include:
the band-pass type photoelectric pulse detection module is connected with the third diaphragm 42, and is used for detecting the concentration of single particles in the ventilation pipeline according to scattered light output by the third diaphragm 42 and outputting a single particle concentration detection signal.
In this embodiment, the band-pass type photoelectric pulse detection module may receive the scattered light output by the third diaphragm 42, convert the optical signal into an electrical signal, and output a single-particle concentration detection signal according to the electrical signal, for example, the electrical signal may be a voltage signal or a current signal, where the higher the voltage value represented by the voltage signal output by the band-pass type photoelectric pulse detection module is, the higher the single-particle concentration is, the lower the voltage value represented by the voltage signal is, and the specific correspondence may be set according to the actual situation.
Referring to fig. 1 to 4, in an embodiment, the band-pass type photoelectric pulse detection module includes:
a second light guiding optical fiber 43, wherein one end of the second light guiding optical fiber 43 is arranged corresponding to the third diaphragm 42;
and the input end of the band-pass photoelectric conversion circuit is connected with the other end of the second light guide optical fiber 43, and the band-pass photoelectric conversion circuit is used for receiving the scattered light output by the third diaphragm 42 through the second light guide optical fiber 43, detecting the concentration of single particles in the ventilation pipeline according to the scattered light output by the third diaphragm 42 and outputting a single particle concentration detection signal.
In this embodiment, one end of the second light guiding fiber 43 may receive the scattered light output by the third diaphragm 42 and output the scattered light to a band-pass photoelectric conversion circuit through the other end, where the band-pass photoelectric conversion circuit may include a photoelectric sensor to convert an optical signal into an electrical signal, and may further include a processor, where the processor obtains a single particle concentration according to the electrical signal and outputs a single particle concentration detection signal, for example, the higher the electrical signal strength is, the higher the single particle concentration is, the lower the electrical signal strength is, and the specific correspondence may be set according to the actual situation; since the pulse signal of the single particle belongs to the intermediate frequency signal, a band-pass type photoelectric conversion circuit needs to be selected. The single particle concentration detection signal can be output to a server terminal, such as a computer, and the user can query the single particle concentration through the server terminal.
The utility model also provides a flue gas particulate detection system, which comprises the flue gas particulate detection device. The specific structure of the flue gas particulate matter detection device refers to the above embodiments, and since the flue gas particulate matter detection system adopts all the technical schemes of all the embodiments, the flue gas particulate matter detection device at least has all the beneficial effects brought by the technical schemes of the embodiments, and the detailed description is omitted.
In one embodiment, the flue gas particulate detection system further comprises:
the outlet of the air pump is connected with a smoke inlet in the smoke particulate matter detection device, and the air pump is used for sucking smoke into the measuring cavity body 10 in the smoke particulate matter detection device from the smoke inlet.
In this embodiment, the suction pump is provided with one suction nozzle and one exhaust nozzle, and vacuum or negative pressure can be continuously formed at the inlet; the working medium is mainly a gaseous instrument, and the aspiration pump can draw the flue gas from the flue gas inlet into the measurement cavity body 10 in the flue gas particulate matter detection device, so that the flue gas passes through the first detection channel 30 and the second detection channel 40, and the particulate matter concentration in the flue gas is detected.
The foregoing description is only of the optional embodiments of the present utility model, and is not intended to limit the scope of the utility model, and all the equivalent structural changes made by the description of the present utility model and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the utility model.
Claims (10)
1. The utility model provides a flue gas particulate detection device which characterized in that, flue gas particulate detection device includes:
the measuring cavity body is provided with a smoke inlet and a smoke outlet, and the smoke inlet is communicated with the smoke outlet to form a ventilation pipeline;
the laser incidence module is arranged on the measuring cavity body and is used for emitting Gaussian beams;
the first detection channel is arranged on the measurement cavity body and communicated with the ventilation pipeline, is opposite to the laser incidence module, and is used for detecting the concentration of group particles in the ventilation pipeline according to scattered light of the group particles in the ventilation pipeline on the Gaussian beam and outputting a group particle concentration detection signal;
the second detection channel is arranged on the measurement cavity body and communicated with the ventilation pipeline, the second detection channel is arranged at an angle with the laser incidence module, and the second detection channel is used for detecting the concentration of single particles in the ventilation pipeline according to the scattered light of the Gaussian beam by the single particles in the ventilation pipeline and outputting a single particle concentration detection signal.
2. The smoke particulate detection device of claim 1, wherein the laser incidence module comprises:
a laser diode for emitting a gaussian beam;
the first diaphragm is arranged opposite to the laser diode, so that the Gaussian beam passes through the first diaphragm and becomes a circular divergent shape;
the first convex lens is opposite to the first diaphragm, and the Gaussian beam is converged by the first convex lens and then output.
3. The smoke particulate matter detection device of claim 1, wherein the first detection channel includes:
the light absorption plate is used for absorbing Gaussian beams directly emitted by the laser incidence module;
the second convex lens is used for converging scattered light passing through the group of particles and outputting the scattered light;
the second diaphragm is arranged opposite to the second convex lens and is used for filtering and outputting scattered light emitted by the second convex lens.
4. The smoke particulate matter detection device of claim 3 wherein the first detection channel further comprises:
the low-pass photoelectric detection module is connected with the second diaphragm and is used for detecting the concentration of group particles in the ventilation pipeline according to scattered light output by the second diaphragm and outputting a group particle concentration detection signal.
5. The smoke particulate matter detection device of claim 4, wherein the low pass photo detection module comprises:
the first light guide optical fiber is arranged at one end of the first light guide optical fiber corresponding to the second diaphragm;
the input end of the low-pass photoelectric conversion circuit is connected with the other end of the first light guide optical fiber, and the low-pass photoelectric conversion circuit is used for receiving scattered light output by the second diaphragm through the first light guide optical fiber, detecting group particle concentration in the ventilation pipeline according to the scattered light output by the second diaphragm and outputting a group particle concentration detection signal.
6. The smoke particulate matter detection device of claim 1, wherein the second detection channel includes:
the third convex lens is used for converging scattered light passing through the single particles and outputting the scattered light;
the third diaphragm is arranged opposite to the third convex lens and is used for filtering and outputting scattered light emitted by the third convex lens.
7. The smoke particulate matter detection device of claim 6, wherein the two detection channels further comprise:
the band-pass type photoelectric pulse detection module is connected with the third diaphragm and is used for detecting the concentration of single particles in the ventilation pipeline according to scattered light output by the third diaphragm and outputting a single particle concentration detection signal.
8. The smoke particulate matter detection device of claim 7, wherein the band-pass type photoelectric pulse detection module comprises:
one end of the second light guide fiber is arranged corresponding to the third diaphragm;
the input end of the band-pass photoelectric conversion circuit is connected with the other end of the second light guide optical fiber, and the band-pass photoelectric conversion circuit is used for receiving scattered light output by the third diaphragm through the second light guide optical fiber, detecting single-particle concentration in the ventilation pipeline according to the scattered light output by the third diaphragm and outputting a single-particle concentration detection signal.
9. A flue gas particulate detection system, characterized in that it comprises a flue gas particulate detection device according to any one of claims 1-8.
10. The smoke particulate matter detection system of claim 9, wherein the smoke particulate matter detection system further comprises:
the outlet of the air pump is connected with a smoke inlet in the smoke particulate matter detection device, and the air pump is used for sucking smoke from the smoke inlet into a measuring cavity body in the smoke particulate matter detection device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320023968.0U CN218938063U (en) | 2023-01-03 | 2023-01-03 | Flue gas particulate matter detection device and flue gas particulate matter detection system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320023968.0U CN218938063U (en) | 2023-01-03 | 2023-01-03 | Flue gas particulate matter detection device and flue gas particulate matter detection system |
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| CN218938063U true CN218938063U (en) | 2023-04-28 |
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| CN202320023968.0U Active CN218938063U (en) | 2023-01-03 | 2023-01-03 | Flue gas particulate matter detection device and flue gas particulate matter detection system |
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