CN204330594U - A kind of atmosphere heavy metal pollution thing collecting and detecting device based on LIBS - Google Patents
A kind of atmosphere heavy metal pollution thing collecting and detecting device based on LIBS Download PDFInfo
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- CN204330594U CN204330594U CN201420802250.2U CN201420802250U CN204330594U CN 204330594 U CN204330594 U CN 204330594U CN 201420802250 U CN201420802250 U CN 201420802250U CN 204330594 U CN204330594 U CN 204330594U
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Abstract
The utility model discloses a kind of atmosphere heavy metal pollution thing collecting and detecting device based on LIBS, comprise atmosphere heavy metal pollution thing acquisition system and laser-induced breakdown detection system.Atmosphere heavy metal pollution thing acquisition system is utilized to make the air suspended particulated containing heavy metal element be attached to solid filter membrane, solid filter membrane is formed metastable gasoloid lamination, and gasoloid comprises suspension various solia particle in an atmosphere and liquid molecule.Gasoloid lamination on the laser beam induced breakdown solid filter membrane that recycling laser instrument sends, form high-temperature plasma, by spectral detection system, the plasma light spectrum signal that gasoloid produces is analyzed, obtain kind and the content information of heavy metal element in air suspended pollution particle, to determine the heavy metal pollution degree of air.The detection that the utility model will become the detection of gaseous state thing solid, the emissive porwer of spectrum of laser plasma can be improved, extend plasma spectrometry launch time, promote the detectability of each Heavy Metallic Elements in atmospheric pollution particle, be applicable to various analysis of depositing heavy metal element in the sample in a gaseous form and detect.
Description
Technical field
The utility model relates to laser spectral analysis field, is specially a kind of atmosphere heavy metal pollution thing collecting and detecting device based on LIBS.
Technical background
Along with the fast development of industry with economy and the sharp increase of the size of population, heavy metal pollution in air becomes one of main pollution that the world today faces, and it mainly comes from a large amount of harmful gas containing heavy metal that commercial production, motor-vehicle tail-gas, mining, boiler fired coal and auto tire wear produce and dust etc.Heavy metal contaminants is mainly attached on PM2.5 and PM10 particle, PM2.5 and PM10 refers to the pellet that equivalent aerodynamic diameter is less than or equal to 2.5 microns and 10 microns, these pellets have stronger adsorptive power, be " carrier " and " catalyzer " of the multiple pollutant comprising heavy metal element, can stop for a long time in an atmosphere and long-distance transmissions.Heavy metal contaminants is difficult to degraded in natural atmospheric environment, can in animal and plant body long term accumulation, and by food chain progressively enrichment, concentration can become tens increases even becoming ten thousand times up to a hundred, finally enter human body and be deposited on lung, participate in blood circulation directly, huge to the extent of injury of human body.
In current detection atmospheric aerosol, the usual way of heavy metal element is: first sample on the spot to air, then deliver to relevant laboratory, measure with atomic absorption spectrography (AAS) (AAS), inductively coupled plasma spectrometry (ICP-AES) or atomic fluorescence spectrometry (AFS) etc.These analytical approachs all need a series of process such as collection, preparation, chemical examination of carrying out sample, usual a few hours even just can obtain testing result after a couple of days, and the method for this interval sampling can only reflect in short period section air in content of beary metal, make testing result depart from actual sample situation and produce certain error.
Laser-induced Breakdown Spectroscopy (LIBS) technology utilizes high energy pulse Laser Focusing in sample surface, by high temperature, high-density laser plasma that sample gasification is transient state, molecule in plasma, atom will produce the spectral line of emission of containing element composition characteristics, by distribution and the intensive analysis of plasma emission spectrum, kind and the content information of heavy metal element in sample can be determined.Laser-induced Breakdown Spectroscopy (LIBS) technology has without the need to carrying out pre-service to sample, the feature that multielement detects simultaneously can be realized, efficiently solve a difficult problem that is online, that monitor in real time and continuously for detection device for multi metallic elements in air suspended pollution particle.
Laser-induced Breakdown Spectroscopy (LIBS) technology is compared with the analytical technology of other maturation, be subject to the impact of the many factors such as LASER Light Source, signals collecting time delay, signal collection device and sample self character due to plasma light spectrum signal, have some limitations in quantitative test.Air is as a kind of sample existed in a gaseous form, if directly sampled to air, pulsed laser beam is acted on atmospheric samples, the plasma spectrometry signal intensity produced through laser-induced breakdown can be very limited, spectroscopic acquisition device is difficult to carry out effective collection analysis, and spectral signal strength fluctuation is violent, even if measure the gas that content is fixing under stable condition, signal also can present wider intensity distributions, and this weakness makes LIBS be subject to certain restrictions in the quantitative context of detection of gas sample.
Summary of the invention
The purpose of this utility model is to provide a kind of atmosphere heavy metal pollution thing collecting and detecting device based on LIBS, to solve existing LIBS usually only for solid sample, and gas sample is difficult to the problem of detection.
In order to solve contents of heavy metal elements detection technique complex procedures in existing atmospheric pollution particle and longer problem consuming time, the technical scheme that the utility model adopts is:
Based on an atmosphere heavy metal pollution thing collecting and detecting device for LIBS, comprise atmosphere heavy metal pollution thing acquisition system and laser-induced breakdown detection system:
Atmosphere heavy metal pollution thing acquisition system forms primarily of vacuum pump, transmission pipeline, gas filtration gathering-device and gas treatment equipment; First by vacuum pump, the air containing heavy metal contaminants is sucked transmission pipeline, then air is via the device for filtering and collecting that two solid filter membranes are housed, by solid filter membrane, adsorption treatment is carried out to the heavy metal pollution particle in air, atmosphere heavy metal particle is made to be attached on solid filter membrane, form the metastable gasoloid lamination of one deck, finally being entered by the air processed fills in the container of water, completes the collection to heavy metal pollution particle in air;
Atmosphere heavy metal pollution thing laser-induced breakdown detection system forms primarily of laser instrument, catoptron, condenser lens, the fiber spectrometer being furnished with ICCD and data collector; The pulse laser beam that laser instrument sends focuses on the gasoloid lamination on solid filter membrane by condenser lens, form high-temperature plasma, by spectral detection system, the plasma light spectrum signal that gasoloid produces is analyzed, obtain kind and the content information of heavy metal element in air suspended pollution particle, to determine the heavy metal pollution degree of air.
Described a kind of atmosphere heavy metal pollution thing collecting and detecting device based on LIBS, it is characterized in that: described transmission pipeline, gas filtration gathering-device and solid filter membrane Stability Analysis of Structures, composition is single, does not wherein comprise the metal ingredient detected in aerosol sample to be measured; Transmission pipeline and gas device for filtering and collecting can be glass pipe.
Described a kind of atmosphere heavy metal pollution thing collecting and detecting device based on LIBS, it is characterized in that: gas filtration gathering-device adopts demountable structure, two solid filter membranes are close to by upper and lower two draw-in grooves and are fixed on diameter and are about in the sleeve pipe of 1 centimetre; It is slightly thick that transmission pipeline comparatively filters sleeve pipe, and respectively overlapping inside the forward and backward transmission pipeline be connected with filtration sleeve pipe has a packing washer, filtration sleeve pipe can be connected in gas delivery conduit by packing washer.
Described a kind of atmosphere heavy metal pollution thing collecting and detecting device based on LIBS, it is characterized in that: the solid filter membrane employing screen angle in gas filtration gathering-device is two filter membrane structures of miter angle, ensures to greatest extent to the collection of PM2.5 and PM10 suspended particulate substance.
Described a kind of atmosphere heavy metal pollution thing collecting and detecting device based on LIBS, is characterized in that: described solid filter membrane is quartz filter or glass fiber filter.
Described a kind of atmosphere heavy metal pollution thing collecting and detecting device based on LIBS, is characterized in that: the aperture of filter screen of solid filter membrane should reach micron dimension, guarantees that filter membrane can adsorb the suspended particulate substance of most PM2.5 and PM10.
Described a kind of atmosphere heavy metal pollution thing collecting and detecting device based on LIBS, it is characterized in that: solid filter membrane diameter is not more than 1 centimetre, ensure the suspended particulate substance of absorption PM2.5 and PM10 as much as possible in solid filter membrane unit area.
Accompanying drawing explanation
Fig. 1 is the acquisition system structural representation of atmosphere heavy metal pollution thing described in the utility model; Fig. 2 is solid filter membrane structural representation in gas filtration gathering-device; Fig. 3 is the detection system structural representation of the atmosphere heavy metal pollution thing based on LIBS described in the utility model.
Embodiment
Based on an atmosphere heavy metal pollution thing collecting and detecting device for LIBS, comprise atmosphere heavy metal pollution thing acquisition system and laser-induced breakdown detection system:
Atmosphere heavy metal pollution thing acquisition system forms primarily of vacuum pump, transmission pipeline, gas filtration gathering-device and gas treatment equipment; First by vacuum pump, the air containing heavy metal contaminants is sucked transmission pipeline, then air is via the device for filtering and collecting being provided with two solid filter membranes, by solid filter membrane, adsorption treatment is carried out to the heavy metal pollution particle in air, atmosphere heavy metal particle is made to be attached on solid filter membrane, form the metastable gasoloid lamination of one deck, finally being entered by the air through device for filtering and collecting fills in the container of water, completes the collection to heavy metal pollution particle in air.
Atmosphere heavy metal pollution thing laser-induced breakdown detection system forms primarily of laser instrument, catoptron, condenser lens, the fiber spectrometer being furnished with ICCD and data collector; The pulse laser beam that laser instrument sends focuses on the gasoloid lamination on solid filter membrane by condenser lens, form high-temperature plasma, by spectral detection system, the plasma light spectrum signal that gasoloid produces is analyzed, obtain kind and the content information of heavy metal element in air suspended pollution particle, to determine the heavy metal pollution degree of air.
In the utility model, laser-induced breakdown gasoloid lamination produces stable plasma light spectrum signal, and selection and the preparation of solid filter membrane are very important.Solid filter membrane should follow following principle:
(1) solid filter membrane has stable, single structure, can not produce interference to the plasma light spectrum signal of gasoloid lamination.
(2) solid filter membrane does not comprise the heavy metal element compositions such as Pb, Cr, Mn, Cd, As, can not impact the contents of heavy metal elements information in tested gasoloid lamination.
(3) solid filter membrane should reach certain hardness magnitude, can stand exciting of long burst laser beam.
(4) aperture of filter screen of solid filter membrane should reach micron dimension, guarantees that filter membrane can adsorb the suspended particulate substance of most PM2.5 and PM10.
The acquisition system of atmosphere heavy metal pollution thing forms primarily of vacuum pump, transmission pipeline, gas filtration gathering-device and gas treatment equipment, as shown in Figure 1.Gas filtration gathering-device mainly refers to the filtration sleeve pipe that intermediate sleeve has solid filter membrane, filter casing diameter and be slightly less than transmission pipeline diameter, filter sleeve pipe to be connected with transmission pipeline by the packing washer of inner-walls of duct, ensure that the gas in transmission pipeline can all enter in water through filter ruffle pipe.In addition, in order to strengthen the adsorption effect to heavy metal particles pollutant in air, gas filtration gathering-device adopts two filter membrane structure, and two solid filter membranes are that miter angle is placed, and structure as shown in Figure 2.
Based on Laser-induced Breakdown Spectroscopy (LIBS) technology detection system as shown in Figure 3.Mainly comprise Nd-YAG laser instrument, fiber spectrometer and spectroscopic acquisition disposal system.After two solid filter membranes after collecting are taken out from filtration sleeve pipe, front filter upper, rear filter membrane under be that 0 degree of angle is stacked together, be placed on rotation platform that rotating speed is 5r/min, to guarantee that pulse laser beam acts on the homogeneity of sample.The pulsed laser beam that Nd-YAG laser instrument sends focuses on the gasoloid build-up surface of solid filter membrane through catoptron by condenser lens, it is excited to produce high-temperature plasma, the signal that high-temperature plasma is launched is gathered by fiber spectrometer through fibre-optic transmission system (FOTS), and the computing machine be connected with spectrometer carries out storage and the analysis of image data.
Specific embodiment:
Select glass fibre as solid filter membrane, by carrying out collection sampling to the air in the seriously polluted region of coke-oven plant's periphery, in laboratory conditions Laser-induced Breakdown Spectroscopy analysis has been carried out to heavy metal element Pb, Cr, As element in air.Result shows: (1) directly acts on by the plasma light spectrum signal that produced by gasoloid lamination and pulse laser beam the spectral signal that air produces and is analyzed, and the spectral signal of three Heavy Metallic Elements all has greatly improved.(2) the four kinds of gas samples gathering 1 hour, 2 hours, 5 hours and 10 hours respectively by atmosphere heavy metal pollution thing acquisition system carry out Laser-induced Breakdown Spectroscopy analysis, wherein first two sample due to acquisition time shorter, plasma spectrometry signal intensity is more weak, and element spectral line is identification not easily; The sample plasma spectrometry signal intensity gathered through 5 hours and 10 hours comparatively first two sample increases significantly, and two kinds of sample light spectrum signal intensity are without significant difference, illustrate that the acquisition time cycle of atmospheric samples should maintain five hours, the stability of such guarantee plasma light spectrum signal.
Claims (5)
1. based on an atmosphere heavy metal pollution thing collecting and detecting device for LIBS, it is characterized in that: comprise atmosphere heavy metal pollution thing acquisition system and laser-induced breakdown detection system; Described atmosphere heavy metal pollution thing acquisition system forms primarily of vacuum pump, transmission pipeline, gas filtration gathering-device and gas treatment equipment; By vacuum pump, the air containing heavy metal contaminants is sucked transmission pipeline, via the gas filtration gathering-device that two solid filter membranes are housed, atmosphere heavy metal particle is attached on solid filter membrane, form the metastable gasoloid lamination of one deck, the air processed is entered and fills in the container of water; Described laser-induced breakdown detection system forms primarily of laser instrument, catoptron, condenser lens, the fiber spectrometer being furnished with ICCD and data collector; The pulse laser beam that laser instrument sends focuses on the gasoloid lamination on solid filter membrane by condenser lens, analyzed the plasma light spectrum signal that gasoloid produces by fiber spectrometer.
2. a kind of atmosphere heavy metal pollution thing collecting and detecting device based on LIBS according to claim 1, is characterized in that: transmission pipeline, gas filtration gathering-device can be glass pipe.
3. a kind of atmosphere heavy metal pollution thing collecting and detecting device based on LIBS according to claim 1, is characterized in that: the solid filter membrane employing screen angle in gas filtration gathering-device is two filter membrane structures of miter angle.
4. a kind of atmosphere heavy metal pollution thing collecting and detecting device based on LIBS according to claim 1, is characterized in that: described solid filter membrane is quartz filter or glass fiber filter.
5. a kind of atmosphere heavy metal pollution thing collecting and detecting device based on LIBS according to claim 1, is characterized in that: solid filter membrane diameter is not more than 1 centimetre.
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Cited By (12)
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| CN104880392A (en) * | 2015-06-11 | 2015-09-02 | 南京信息工程大学 | PM2.5 (particulate matter 2.5) detection warning device and method |
| CN105698850A (en) * | 2016-01-28 | 2016-06-22 | 武汉大学 | An experiment system and an experiment method used for studying dielectric barrier discharge processing of SF[6] gases |
| CN107607521A (en) * | 2017-09-11 | 2018-01-19 | 江西农业大学 | A kind of tealeaves heavy metal analysis device and its detection method |
| CN107727642A (en) * | 2017-09-26 | 2018-02-23 | 苏州莱铯科技有限公司 | A kind of laser detecting method of Atmospheric particulates heavy metal element |
| CN107831159A (en) * | 2017-12-13 | 2018-03-23 | 中国科学院上海应用物理研究所 | The detection means of metallic element in a kind of aerosol |
| WO2018082136A1 (en) * | 2016-11-07 | 2018-05-11 | 中国科学院光电研究院 | Scanning type laser-induced spectral plane range analysis and detection system |
| CN108169092A (en) * | 2018-03-19 | 2018-06-15 | 南京信息工程大学 | Atmospheric particulates heavy metal and its isotope on-line water flushing devices and methods therefor |
| CN109085151A (en) * | 2018-09-11 | 2018-12-25 | 南京信息工程大学 | The on-line measuring device and detection method of a kind of atmosphere pollution mercury and its isotope |
| CN109374596A (en) * | 2018-11-08 | 2019-02-22 | 天津大学 | Portable flue gas heavy metal element detection system based on laser induced breakdown spectroscopy |
| CN113310861A (en) * | 2021-05-28 | 2021-08-27 | 中国矿业大学 | Dust component detection device and method based on electric spark induced breakdown spectroscopy |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104880392A (en) * | 2015-06-11 | 2015-09-02 | 南京信息工程大学 | PM2.5 (particulate matter 2.5) detection warning device and method |
| CN105698850A (en) * | 2016-01-28 | 2016-06-22 | 武汉大学 | An experiment system and an experiment method used for studying dielectric barrier discharge processing of SF[6] gases |
| WO2018082136A1 (en) * | 2016-11-07 | 2018-05-11 | 中国科学院光电研究院 | Scanning type laser-induced spectral plane range analysis and detection system |
| US10823679B2 (en) | 2016-11-07 | 2020-11-03 | Academy Of Opto-Electronics Chinese Academy Of Sciences | Scanning type laser induced spectrum analysis and detection system |
| CN107607521A (en) * | 2017-09-11 | 2018-01-19 | 江西农业大学 | A kind of tealeaves heavy metal analysis device and its detection method |
| CN107607521B (en) * | 2017-09-11 | 2019-10-25 | 江西农业大学 | A kind of tealeaves heavy metal analysis device and its detection method |
| CN107727642A (en) * | 2017-09-26 | 2018-02-23 | 苏州莱铯科技有限公司 | A kind of laser detecting method of Atmospheric particulates heavy metal element |
| CN107727642B (en) * | 2017-09-26 | 2020-07-10 | 苏州莱铯科技有限公司 | Laser detection method for heavy metal elements in atmospheric particulates |
| CN107831159A (en) * | 2017-12-13 | 2018-03-23 | 中国科学院上海应用物理研究所 | The detection means of metallic element in a kind of aerosol |
| CN108169092B (en) * | 2018-03-19 | 2023-10-27 | 南京信息工程大学 | Online detection device and method for heavy metals and isotopes of atmospheric particulates |
| CN108169092A (en) * | 2018-03-19 | 2018-06-15 | 南京信息工程大学 | Atmospheric particulates heavy metal and its isotope on-line water flushing devices and methods therefor |
| CN109085151A (en) * | 2018-09-11 | 2018-12-25 | 南京信息工程大学 | The on-line measuring device and detection method of a kind of atmosphere pollution mercury and its isotope |
| CN109374596A (en) * | 2018-11-08 | 2019-02-22 | 天津大学 | Portable flue gas heavy metal element detection system based on laser induced breakdown spectroscopy |
| CN113310862A (en) * | 2021-05-28 | 2021-08-27 | 中国矿业大学 | Device and method for continuously detecting air particles based on Raman spectrum |
| CN113310861A (en) * | 2021-05-28 | 2021-08-27 | 中国矿业大学 | Dust component detection device and method based on electric spark induced breakdown spectroscopy |
| CN113495068A (en) * | 2021-07-13 | 2021-10-12 | 沈阳理工大学 | Smoke particulate component detection device based on double-pulse laser-induced breakdown spectroscopy |
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