CN206440578U - The detection means of particulate matter in gas - Google Patents
The detection means of particulate matter in gas Download PDFInfo
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- CN206440578U CN206440578U CN201621480073.6U CN201621480073U CN206440578U CN 206440578 U CN206440578 U CN 206440578U CN 201621480073 U CN201621480073 U CN 201621480073U CN 206440578 U CN206440578 U CN 206440578U
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- detection
- gas
- particulate matter
- light
- detection means
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Abstract
The detection means that the utility model provides particulate matter in a kind of detection means of particulate matter in gas, gas includes light source, measurement detector, analytic unit；Reference detector, in detection zone, projection of the detection viewing field of the detection viewing field of the reference detector and the measurement detector on the same inwall for forming the detection zone has overlapping, and the detection viewing field of the reference detector avoids the detection light that the light source is sent；The output end of the reference detector connects the analytic unit.The utility model has the advantages that accuracy of detection is high.
Description
Technical field
The utility model is related to gas-monitoring, the detection means of particulate matter more particularly in gas.
Background technology
Current country's atmospheric environment situation very severe, particularly airborne fine particulate matter contamination accident in recent years takes place frequently, Gu
Determine contribution focus as public attention of the pollution sources soot emissions to fine particle, how accurately to measure stationary source flue dust
Difficult point of the discharge as the field.
Current detection method has light scattering method, β attenuation sensors, optical transmission method etc..Light scattering method measurement is accurate, precision
High, reproducible, measuring speed is fast, is online direct reading measurement mode, without sampling, can real-time continuous provide particle concentration
Instantaneous value, therefore stationary source flue dust detection on it is more universal；The principle of light scattering method is：Light beam from light source shines
It is mapped to, so as to scatter, scattered light becomes after being changed through photelectric receiver in a certain space (measurement zone) containing candidate particles Nei
For electric signal, after amplifying through amplifier, the mass concentration of measurement zone endoparticle thing can be calculated according to light scattering theory.
Easily disturbed when light scattering method is used at the scene by bias light.Mainly there are two parts, one in the source of bias light
Part natural light, the intensity of natural light is directly related with sunshine, therefore environment, when changing, the intensity of natural light can also be sent out
Changing；A part is radiated at the scattered light of walling of flue reflection, intensity and the intensity of light source, the flue chi of scattered light from light source
Very little, walling of flue reflection characteristic is respectively provided with certain relation, chimney that flue gas operating mode is complicated, therefore the veiling glare of walling of flue reflection
Intensity can also change.
To solve this problem, currently existing scheme mainly sets one respectively by installing dust measurement opposite in chimney
Transmitting light receives ligh trap and bias light ligh trap to reduce the interference of background stray light.Had using the subject matter of the program：
1. needing to carry out the installation of emission measurement unit and ligh trap respectively in the STH of chimney two, setting angle and position will
Ask high, very big inconvenience is brought to system installation and debugging.
2. extinction performance is used for a long time under the dirty flue gas environment of corrosivity and changes for ligh trap, so as to cause background stray light
Intensity changes.
3. can not eliminate the external world using this scheme enters the caused background spurious light intensity of natural light light intensity change in chimney
Degree change.
Utility model content
In order to solve the deficiency in above-mentioned prior art, the utility model provides a kind of high gas of accuracy of detection
The detection means of middle particulate matter.
The purpose of this utility model is achieved through the following technical solutions：
The detection means of particulate matter includes light source, measurement spy in the detection means of particulate matter in a kind of gas, the gas
Survey device, analytic unit；Particulate matter detection means further comprises in the gas：
Reference detector, in detection zone, the spy of the detection viewing field of the reference detector and the measurement detector
Surveying projection of the visual field on the same inwall for forming the detection zone has overlapping, and the detection viewing field of the reference detector is kept away
Open the detection light that the light source is sent；The output end of the reference detector connects the analytic unit.
Compared with prior art, the utility model have the advantage that for：
1. installation and debugging are convenient, the unilateral of flue, or adjustment reference detector are such as arranged in existing extraction-type
Position in flue gas in particulate matter detection means；
2. avoiding the periodic cleaning to ligh trap, safeguard simple；
3. the background stray light in real-Time Compensation detection zone, improves measuring concentration of granules in certain precision；
4. do not influenceed by the change of natural light light intensity.
Brief description of the drawings
Referring to the drawings, disclosure of the present utility model will be easier to understand.Skilled addressee readily understands that
It is：These accompanying drawings are used only for illustrating the technical solution of the utility model, and are not intended to protection of the present utility model
Scope is construed as limiting.In figure：
Fig. 1 is the structure diagram of the detection means of particulate matter in the gas according to the utility model embodiment 1.
Embodiment
Fig. 1 and following description describe optional embodiment of the present utility model to instruct those skilled in the art how real
Apply and reproduce the utility model.In order to instruct technical solutions of the utility model, simplify or eliminate some conventional aspects.Ability
Field technique personnel should be appreciated that modification or replacement from these embodiments will be in the range of the utility model.This area skill
Art personnel should be appreciated that following characteristics can combine to form multiple modifications of the present utility model in a variety of ways.Thus, this reality
Following optional embodiments are not limited to new, and are only limited by claim and their equivalent.
Embodiment 1：
Fig. 1 schematically illustrates the structure diagram of the detection means of particulate matter in the gas of the utility model embodiment,
As shown in figure 1, the detection means of particulate matter includes in the gas：
Light source 21, measurement detector 31, analytic unit and gas compartment 11, these are all the state of the art, herein
Repeat no more；
Reference detector 32, in gas compartment, the spy of the detection viewing field of the reference detector and the measurement detector
Surveying projection of the visual field on the same inwall for forming the gas compartment has overlapping (partly overlap, all overlapping), the reference
The detection viewing field of detector 32 avoids the detection light 22 that the light source 21 is sent, and avoids the air-flow between gas compartment inlet and outlet
41, detection light 22 passes through the air-flow 41；The output end of the reference detector connects the analytic unit；
Light intensity V, the light intensity V of reference detector output that analytic unit is exported according to measurement detector0Obtain in gas compartment
The concentration C of particulate matter=k (V-V0), k is conversion coefficient.
The detection method of particulate matter in a kind of gas of the utility model embodiment, namely in above-mentioned gas particulate matter inspection
The detection method for surveying particulate matter in the course of work of device, the gas comprises the following steps：
(A1) the detection light 22 that light source 21 is sent is injected in gas compartment, the air-flow through gas compartment inlet and outlet
41；
(A2) the light intensity V that measurement detector 31 is measured send analytic unit；The light intensity V that reference detector 32 is measured0Send analysis
Unit；
In detection zone, the detection viewing field of the detection viewing field of the reference detector and the measurement detector is being formed
Projection on the same inwall of the detection zone has overlapping, and the detection viewing field of the reference detector avoids the light source hair
The detection light gone out；
(A3) analytic unit is according to light intensity V, V0Obtain concentration C=k (V-V of detection zone endoparticle thing0), k is conversion
Coefficient.
Embodiment 2：
In the flue of the utility model embodiment in gas particulate matter detection means, the detection of particulate matter in the gas
Device includes：
Light source, measurement detector, analytic unit, these are all the state of the art, be will not be repeated here；
Reference detector, in flue, the detection of the detection viewing field of the reference detector and the measurement detector is regarded
Projection on the same inwall of the flue has overlapping (partly overlap, all overlapping), the spy of the reference detector
Survey visual field and avoid the detection light that the light source is sent；The output end of the reference detector connects the analytic unit；
Light intensity V, the light intensity V of reference detector output that analytic unit is exported according to measurement detector0Obtain in flue box
The concentration C of particulate matter=k (V-V0), k is conversion coefficient.
The detection method of particulate matter in a kind of gas of the utility model embodiment, namely in above-mentioned gas particulate matter inspection
The detection method for surveying particulate matter in the course of work of device, the gas comprises the following steps：
(A1) the detection light 22 that light source 21 is sent is injected in gas compartment, the air-flow through gas compartment inlet and outlet
41；
(A2) the light intensity V that measurement detector 31 is measured send analytic unit；The light intensity V that reference detector 32 is measured0Send analysis
Unit；
In flue, the detection viewing field of the detection viewing field of the reference detector and the measurement detector is in the same of flue
Projection on one inwall has overlapping, and specific implementation is：The visible laser sent using first laser device is on inwall
Reflect the detection viewing field that detector is measured described in signal；The visible laser sent using second laser is on the inwall
The detection viewing field of reference detector described in affine signal, the detection viewing field of the reference detector avoids what the light source was sent
Detection light；
(A3) analytic unit is according to light intensity V, V0Obtain concentration C=k (V-V of detection zone endoparticle thing0), k is conversion
Coefficient.
Claims (4)
1. the detection means of particulate matter includes light source, measurement detection in the detection means of particulate matter in a kind of gas, the gas
Device, analytic unit；It is characterized in that：Particulate matter detection means further comprises in the gas：
Reference detector, in detection zone, the detection of the detection viewing field of the reference detector and the measurement detector is regarded
Projection on the same inwall for forming the detection zone has overlapping, and the detection viewing field of the reference detector avoids institute
State the detection light that light source is sent；The output end of the reference detector connects the analytic unit.
2. the detection means of particulate matter in gas according to claim 1, it is characterised in that：The detection zone formation exists
In pipeline or in gas compartment.
3. the detection means of particulate matter in gas according to claim 2, it is characterised in that：In gas compartment, the light
Air-flow of the detection light that source is sent through the gas feed and outlet of gas compartment.
4. the detection means of particulate matter in gas according to claim 1, it is characterised in that：Particulate matter in the gas
Detection means further comprises：
First laser device, the detection viewing field of the first laser device mark measurement detector；
Second laser, the second laser marks the detection viewing field of the reference detector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621480073.6U CN206440578U (en) | 2016-12-30 | 2016-12-30 | The detection means of particulate matter in gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621480073.6U CN206440578U (en) | 2016-12-30 | 2016-12-30 | The detection means of particulate matter in gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206440578U true CN206440578U (en) | 2017-08-25 |
Family
ID=59642186
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621480073.6U Withdrawn - After Issue CN206440578U (en) | 2016-12-30 | 2016-12-30 | The detection means of particulate matter in gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206440578U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106644867A (en) * | 2016-12-30 | 2017-05-10 | 聚光科技(杭州)股份有限公司 | Device and method for detecting particulate matters in gases |
| CN111912755A (en) * | 2020-08-07 | 2020-11-10 | 山东中煤工矿物资集团有限公司 | Mining dust concentration sensor, sensor system and method |
-
2016
- 2016-12-30 CN CN201621480073.6U patent/CN206440578U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106644867A (en) * | 2016-12-30 | 2017-05-10 | 聚光科技(杭州)股份有限公司 | Device and method for detecting particulate matters in gases |
| CN106644867B (en) * | 2016-12-30 | 2023-08-29 | 聚光科技(杭州)股份有限公司 | Device and method for detecting particulate matters in gas |
| CN111912755A (en) * | 2020-08-07 | 2020-11-10 | 山东中煤工矿物资集团有限公司 | Mining dust concentration sensor, sensor system and method |
| CN111912755B (en) * | 2020-08-07 | 2021-08-10 | 山东中煤工矿物资集团有限公司 | Mining dust concentration sensor, sensor system and method |
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| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20170825 Effective date of abandoning: 20230829 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20170825 Effective date of abandoning: 20230829 |
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| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |