CN205786518U - Dioxin organic micro-pollutant on-line detecting system in actual flue gas - Google Patents
Dioxin organic micro-pollutant on-line detecting system in actual flue gas Download PDFInfo
- Publication number
- CN205786518U CN205786518U CN201620553938.0U CN201620553938U CN205786518U CN 205786518 U CN205786518 U CN 205786518U CN 201620553938 U CN201620553938 U CN 201620553938U CN 205786518 U CN205786518 U CN 205786518U
- Authority
- CN
- China
- Prior art keywords
- time
- flue gas
- pipeline
- module
- thermal desorption
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
Abstract
This utility model relates to organic micro-pollutant detection technique, it is desirable to provide dioxin organic micro-pollutant on-line detecting system in a kind of actual flue gas.The sample devices of this system is connected with thermal desorption instrument and sampling pump module respectively by pipeline, and pipeline arranges heat traced pipeline；Laser aid can export deep ultraviolet wavelength and two kinds of light beams of Generation of tunable UV visible waveband simultaneously, is provided with optical lens group between time of-flight mass spectrometer and laser aid, and two bundle laser enter the laser window of time of-flight mass spectrometer after being closed bundle by it；The sample introduction pipeline of time of-flight mass spectrometer connects with marked gas storage bottle and thermal desorption instrument respectively.Thermal desorption technology is combined by this utility model with ionization time of flight, the shortcoming overcoming sample detecting technology, can reflect the concentration of emission of dioxin in flue gas the most in time, and precision is high, contain much information.System composition can be adjusted according to the actual requirements, strengthen adaptability.Testing result can characterize combustion conditions in stove, optimization of combustion process control.
Description
Technical field
This utility model relates to the detection technique of dioxin organic micro-pollutant, particularly in real time, the most right
In flue gas, the concentration of dioxin trace organic substance carries out on-line checking.
Background technology
Dioxin belongs to trace level material, will accurately detect the concentration of dioxin in flue gas, has the highest technology difficult
Degree.Detection to dioxin mainly uses high-resolution gas chromatogram/high resolution mass spectrum combined instrument with off-line after spot sampling
(HRGC/HRMS) it is main for carrying out off-line analysis.Off-line analysis need to measure the cycle usual through the sample pretreatment process of very complicated
Need at least 2 time-of-weeks, not only time-consuming serious, simultaneously can the chemical reagent of both expensive and cost of labor.Therefore can not be extensive
The detection work of dioxin is carried out on ground, and this also becomes the important restriction factor of current comprehensive limited control dioxin.
Dioxin online measuring technique overcomes the shortcoming of off-line analysis the most well, not only can reflect the most in time
The concentration of emission of dioxin in flue gas, and the result precision of gained is high, contain much information.On-line checking also has sign stove internal combustion
Burn operating mode to instruct equipment optimization to run, assist dioxin to generate advantage and the effects such as process study.But, at present at world wide
The most not yet there is the dioxin online measuring technique scheme of a set of maturation, main reason is that the concentration of dioxin is extremely low, at ppb
(part per billion) level, the detection limit of general online analytical instrument is difficult to meet requirement.
It is the most crucial to the on-line measurement realizing dioxin that selection and dioxin have the indicant of certain dependency.Online
Measure the concentration of indicant, converse the concentration of dioxin according to the incidence relation of indicant Yu dioxin, it is possible to achieve two dislike
The indirect measurement of English.Smoke components is extremely complex, has from high to low according to general concentration: CO, HCl, imperfect combustion product
(PICs), chloro micromolecular compound, chlorinated aromatic compound, Polychlorinated biphenyls, dioxin etc..Indicant can only be by substantial amounts of
Data, in analysis flue gas, the dependency between each component and dioxin determines.It has now been found that the chloro ring such as chlorobenzene, chlorophenol
Not only there is preferable indexical relation in shape organic molecule, and concentration compares dioxin, exceeds two orders of magnitude with dioxin, can
Reach PPM level, be proper indicant.
Thermal desorption technology (Thermal Desorption, TD) and ionization time of flight (Time of Flight
Mass Spectrometry, TOFMS) it is two kinds of advanced chemical analysis detection techniques, and it has been applied to environmental protection tests neck
Territory.But at home and abroad there is no and both advanced technologies are combined and is applied to the organic dirt of dioxin trace in actual flue gas
The report of dye thing on-line checking.
Utility model content
The technical problems to be solved in the utility model is, overcomes deficiency of the prior art, it is provided that in a kind of actual flue gas
Dioxin organic micro-pollutant on-line detecting system.This system can be with dioxin trace in the actual flue gas of real-time online measuring
Amount organic contamination substrate concentration.
For solving above-mentioned technical problem, solution of the present utility model is:
There is provided dioxin organic micro-pollutant on-line detecting system in a kind of actual flue gas, including for gathering, locating
The flue gas pretreatment module of reason flue gas sample；This system also includes analyzing detection module and operation control module；
Described flue gas pretreatment module includes that the sampling connected with thermal desorption instrument and sampling pump module respectively by pipeline is set
Standby, described pipeline arranges heat traced pipeline；
Described analysis detection module includes time of-flight mass spectrometer, and can export deep ultraviolet wavelength and tunable purple simultaneously
The laser aid of outer two kinds of light beams of visible waveband；Optical lens group it is provided with between time of-flight mass spectrometer and laser aid, two
Shu Jiguang enters the laser window of time of-flight mass spectrometer after being closed bundle by it；The sample introduction pipeline of time of-flight mass spectrometer respectively with mark
Determine gas storage bottle and thermal desorption instrument connects；
Described operation control module includes industrial computer and human-computer interaction interface, and industrial computer is connected to the flight time by holding wire
Mass spectrograph and thermal desorption instrument.
In this utility model, also include smoke filtration module, be the filter of band heating function；The entrance of filter with adopt
The outlet of sample equipment connects, and the outlet of filter connects with thermal desorption instrument and sampling pump module respectively.
In this utility model, also include homologue separation module, be the gas phase that can carry out smoke components separating and deriving
Chromatograph；The entrance of gas chromatograph connects with the outlet of thermal desorption instrument, and the outlet of gas chromatograph is connected to time of-flight mass spectrometer
Sample introduction pipeline.
In this utility model, described sample devices is that constant speed heats sampling gun.
In this utility model, condensing unit that described sampling pump module includes being sequentially connected with by pipeline, flow valve, flow
Meter and sampling pump, wherein condensing unit entrance connects with sample devices outlet, and the floss hole of sampling pump leads to air.
In this utility model, described flue gas pretreatment module also includes attemperating unit, for heat traced pipeline is carried out temperature
Control.
In this utility model, described laser aid is made up of Nd:YAG laser instrument, the 5th resonator cavity and OPO module, wherein,
OPO module is for exporting the laser of Generation of tunable UV visible waveband, and the 5th resonator cavity is for exporting the laser of deep ultraviolet wavelength.
In this utility model, described optical lens group includes ultraviolet beam splitting chip and at least one ultraviolet reflectance mirror.
Compared with prior art, the beneficial effects of the utility model are:
1, thermal desorption technology is combined by this utility model first with ionization time of flight, and is applied in actual flue gas
The on-line checking of dioxin organic micro-pollutant.The shortcoming overcoming sample detecting technology well, not only can be quick
The concentration of emission of dioxin in reflection flue gas in time, and the result precision of gained is high, contain much information.
2, this utility model have employed flexibly the mode of " stuck-module+optional module ", adjusts system according to the actual requirements
The composition of system so that it is adaptability is greatly enhanced.
3, combustion conditions in this utility model testing result can characterize stove, optimization of combustion process, incinerator is realized anti-
Feedback controls.
4, the detection of dioxin organic micro-pollutant in this utility model is equally applicable to laboratory, for correlational study
Brand-new detection technique is provided.
Accompanying drawing explanation
Fig. 1 is structure flow chart of the present utility model.
Reference in figure is: 1.Nd:YAG laser instrument: 2. the 5th resonator cavity；3.OPO module；4. deep ultraviolet wavelength is defeated
Go out；5. UV, visible light wave band output (tunable)；6. optical lens group；7. laser window；8. flight time mass spectrum ionized region；9.
Flight time mass spectrum movement area；10. flight time mass spectrum echo area；11.MCP detector；12. Time-of flight analyzers；13. arteries and veins
Rush injection valve and flange；14. sample introduction pipelines；15. industrial computers；16. human-computer interaction interfaces；17. constant speed heating sampling guns；18. is anti-
Blow passage；19. heat traced pipelines；20. (band heating function) filter；21. attemperating units；22.T type joint；23. thermal desorptions
Instrument；24. gas chromatograpies；25. mass flow controllers；26. marked gas storage bottles；27. condensing units；28. flow valves；29.
Effusion meter；30. sampling pumps.
Detailed description of the invention
In this utility model in the actual flue gas system of dioxin organic micro-pollutant on-line checking, mainly by
Flue gas pretreatment module, analysis detection module, operation control module composition.The core of flue gas pretreatment module is thermal desorption instrument,
For the material in sampling flue gas is carried out enrichment method so that test substance concentration improves, and then is greatly enhanced detection signal.
The core analyzing detection module is time of-flight mass spectrometer, can make the sample introduction material after enrichment method within the extremely short time
Response, provides the result of qualitative and quantitative analysis.The core of operation control module is industrial computer (computer), is used for setting thermal desorption
Instrument and the running parameter of time of-flight mass spectrometer, control and coordinate the workflow of two instruments, gather and show the flight time
Mass spectrographic detection signal.
With detailed description of the invention, this utility model is described in further detail below in conjunction with the accompanying drawings:
As it is shown in figure 1, on-line detecting system of the present utility model is by three indispensable modules (flue gas pretreatment module, analyses
Detection module, operation control module) and two apolegamy module (smoke filtration module, homologue separation module) compositions.
The concrete structure composition of system is described as follows:
Flue gas pretreatment module includes constant speed heating sampling gun 17, condensing unit 27, the flow being sequentially connected with by pipeline
Valve 28, effusion meter 29 and sampling pump 30, the floss hole of sampling pump 30 leads to air.Thermal desorption instrument 23 is by pipeline and T connector 22
One end connect, the another two ends of T connector 22 connect respectively constant speed heating sampling gun 17, condensing unit 27.Arrange on described pipeline
Heat traced pipeline 19, attemperating unit 21 is for carrying out temperature control to heat traced pipeline 19.The thief hatch of constant speed heating sampling gun 17 can
To stretch out people to chimney internal collection fume sample, it is also possible in laboratory, dioxin organic micro-pollutant adopts
Sample.
Analyze detection module and include time of-flight mass spectrometer 12, and deep ultraviolet wavelength (such as 213nm) can be exported simultaneously
Laser aid with two kinds of light beams of Generation of tunable UV visible waveband.Laser aid is by Nd:YAG laser instrument the 1, the 5th resonator cavity 2 and
OPO module 3 forms, and wherein, OPO module 3 is for exporting the laser of Generation of tunable UV visible waveband, and the 5th resonator cavity 2 is for defeated
Go out the laser of deep ultraviolet wavelength.Optical lens group 6, optical lens group it is provided with between time of-flight mass spectrometer 12 and laser aid
6 include ultraviolet beam splitting chip and two ultraviolet reflectance mirrors.Two bundle laser enter time of-flight mass spectrometer after being closed bundle by optical lens group 6
The laser window of 12；The sample introduction pipeline of time of-flight mass spectrometer 12 has two-way to input, and a road connects with thermal desorption instrument 23, another road
Connected with marked gas storage bottle 26 by mass flow controller 25.
Operation control module includes industrial computer 15 and human-computer interaction interface 16, when industrial computer 15 is connected to flight by holding wire
Between mass spectrograph 12 and thermal desorption instrument 23.
Smoke filtration module is optional module.The present embodiment is the filter 20 of band heating function, its entrance and constant speed
Heating sampling gun 17 outlet connects, and its outlet entrance with thermal desorption instrument 23 and condensing unit 27 the most respectively connects.
Homologue separation module is optional module.It the present embodiment is the gas phase that can carry out smoke components separating and deriving
Chromatograph 24；The entrance of gas chromatograph 24 connects, when the outlet of gas chromatograph 24 is connected to flight with thermal desorption instrument 23 outlet
Between the sample introduction pipeline 14 of mass spectrograph 12.
The method of operation explanation of each module:
Smoke filtration module
Gas to be measured in incinerator back-end ductwork, entered through constant speed heating sampling gun 17 under the effect of sampling pump 30
Filter 20 carries out dust removal process.For 0.01 micron grain size, dust removal efficiency reaches 95%, to guarantee that the particulate matter in flue gas will not shadow
Ring testing result, analysis on damage instrument.Whole sample lines keeps high temperature under the effect of heat traced pipeline 19, it is to avoid some is to be measured
Gas condenses, and whole pipeline temperature control can reach 200 DEG C, temperature-controlled precision ± 2 DEG C.
Flue gas pretreatment module
After dust removal process, sample gas enters into thermal desorption instrument 23.Specific adsorbing medium is loaded in the middle of thermal desorption instrument 23,
The dioxin indicant molecule of the overwhelming majority in adsorption sampling gas at low temperatures；After absorption completes, thermal desorption instrument 23 is quick
Heat up so that the indicant molecule in adsorbing medium promptly departs from very short time, along with heat is quickly flowed out in a small amount of carrier gas
Desorption instrument 23 enters subsequent analysis step.Through the process of such a absorption/desorption, the instruction that in flue gas, content is extremely low originally
Thing molecule is concentrated, and concentration can promote 2 to 3 orders of magnitude, and then is greatly enhanced detection signal, improves whole system
Detection limit.Thermal desorption instrument 23 in this utility model loads two groups of parallel adsorbing mediums, when one of which is in adsorption-like
During state, another group is then in detachment status, thus improves the efficiency of sampling and detection.Thermal desorption instrument in this utility model can be adopted
The TT24-7 type product produced with MARKES company.
Homologue separation module
Gas molecule to be measured after concentration, is brought in gas chromatograph 24 by carrier gas.Originally the indicant molecule mixed
Through the centrifugation of chromatographic column, the most in succession flow out gas chromatograph 24 with carrier gas.This order is by chromatographic column
The temperature-rising method of type and gas chromatograph 24 determines, i.e. can realize specific with heating schedule by choosing suitable chromatographic column
Elution order.After each separated process of homologue molecule of material of the same race, it is fixed to realize respectively during subsequent detection
Component analysis.
Analyze detection module
Gas molecule to be measured after separation, enters into flight time matter along sample introduction pipeline 14 through Pulsed Sampling valve and flange 13
In the middle of spectrometer 12.Tracing for generating UV tunable laser 5 is combined into a branch of with deep ultraviolet wavelength laser 4 via optical lens group 6, and via laser
Window 7 is directed to flight time mass spectrum ionized region 8.Gas molecule to be measured first absorbs the photon of specific UV wave band, reaches altogether
Shake excited state；The photon of re-absorption deep ultraviolet wavelength, complete (1+1 ') multiphoton ionization process.This process is follow-up flight
Time mass spectrum analysis provides ion source.
Through each ion that laser ionization produces, owing to its charge-mass ratio q/m is different, enter into the initial speed in field-free flight district 9
Degree v is different, so it is different to arrive detector total flight time, the ion of so different charge-mass ratios is achieved that separation.All
Ion be finally knocked MCP detector 11 produce correspondence voltage signal.Gas concentration to be measured is the highest, the ion that ionization produces
Quantity the most, clash into MCP (Microchanel Plate) voltage signal that produces the strongest.Total flight time according to ion
With the intensity producing voltage signal, it is achieved to the qualitative of gas to be measured and quantitative analysis.
Operation control module
Industrial computer 15 receives the detection signal of MCP detector 11, in man-machine friendship after special operation control software processes
Show with the form of mass spectrum on interface 16 mutually.Component and the concentration information of gas to be measured can be obtained by mass spectrum.With
The manipulation instruction that family is made on human-computer interaction interface 16, sends to each parts of detecting system via industrial computer 15, thus realizes
A whole set of detecting system operation and control.
Finally it should be noted that listed above is only specific embodiment of the utility model.Obviously, this practicality is new
Type is not limited to above example, it is also possible to have many variations.Those of ordinary skill in the art can be from disclosed in this utility model
The all deformation directly derived in content or associate, are all considered as protection domain of the present utility model.
Claims (8)
1. a dioxin organic micro-pollutant on-line detecting system in actual flue gas, including for gathering, processing flue gas
The flue gas pretreatment module of sample；It is characterized in that, this system also includes analyzing detection module and operation control module；
Described flue gas pretreatment module includes the sample devices connected respectively by pipeline, institute with thermal desorption instrument and sampling pump module
State and heat traced pipeline is set on pipeline；
Described analysis detection module includes time of-flight mass spectrometer, and can export deep ultraviolet wavelength and Generation of tunable UV can simultaneously
See the laser aid of two kinds of light beams of wave band；Being provided with optical lens group between time of-flight mass spectrometer and laser aid, two bundles swash
Light enters the laser window of time of-flight mass spectrometer after being closed bundle by it；The sample introduction pipeline of time of-flight mass spectrometer respectively with demarcate gas
Body storage bottle and thermal desorption instrument connect；
Described operation control module includes industrial computer and human-computer interaction interface, and industrial computer is connected to flight time mass spectrum by holding wire
Instrument and thermal desorption instrument.
System the most according to claim 1, it is characterised in that also include smoke filtration module, is the mistake of band heating function
Filter；The outlet of the entrance of filter and sample devices connects, the outlet of filter respectively with thermal desorption instrument and sampling pump module phase
Connect.
System the most according to claim 1, it is characterised in that also include homologue separation module, is will to become in flue gas
Divide the gas chromatograph carrying out separating, deriving；The entrance of gas chromatograph connects with the outlet of thermal desorption instrument, going out of gas chromatograph
Mouth is connected to the sample introduction pipeline of time of-flight mass spectrometer.
4. according to the system described in claims 1 to 3 any one, it is characterised in that described sample devices is constant speed heating
Sampling gun.
5. according to the system described in claims 1 to 3 any one, it is characterised in that described sampling pump module includes passing through
Condensing unit, flow valve, effusion meter and the sampling pump that pipeline is sequentially connected with, wherein condensing unit entrance exports phase with sample devices
Connecing, the floss hole of sampling pump leads to air.
6. according to the system described in claims 1 to 3 any one, it is characterised in that described flue gas pretreatment module is also wrapped
Include attemperating unit, for heat traced pipeline is carried out temperature control.
7. according to the system described in claims 1 to 3 any one, it is characterised in that described laser aid is swashed by Nd:YAG
Light device, the 5th resonator cavity and OPO module composition, wherein, OPO module is used for exporting the laser of Generation of tunable UV visible waveband, the
Five resonator cavitys are for exporting the laser of deep ultraviolet wavelength.
8. according to the system described in claims 1 to 3 any one, it is characterised in that described optical lens group includes ultraviolet
Beam splitting chip and at least one ultraviolet reflectance mirror.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620553938.0U CN205786518U (en) | 2016-06-08 | 2016-06-08 | Dioxin organic micro-pollutant on-line detecting system in actual flue gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620553938.0U CN205786518U (en) | 2016-06-08 | 2016-06-08 | Dioxin organic micro-pollutant on-line detecting system in actual flue gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205786518U true CN205786518U (en) | 2016-12-07 |
Family
ID=58134705
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620553938.0U Active CN205786518U (en) | 2016-06-08 | 2016-06-08 | Dioxin organic micro-pollutant on-line detecting system in actual flue gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205786518U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105954441A (en) * | 2016-06-08 | 2016-09-21 | 浙江富春江环保科技研究有限公司 | System for on-line detection of dioxin type trace organic pollutants in actual smoke |
| CN112903801A (en) * | 2021-01-27 | 2021-06-04 | 南开大学 | Ion photodissociation method and device |
-
2016
- 2016-06-08 CN CN201620553938.0U patent/CN205786518U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105954441A (en) * | 2016-06-08 | 2016-09-21 | 浙江富春江环保科技研究有限公司 | System for on-line detection of dioxin type trace organic pollutants in actual smoke |
| CN105954441B (en) * | 2016-06-08 | 2019-03-29 | 浙江富春江环保科技研究有限公司 | Dioxin organic micro-pollutant on-line detecting system in a kind of practical flue gas |
| CN112903801A (en) * | 2021-01-27 | 2021-06-04 | 南开大学 | Ion photodissociation method and device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105954441B (en) | Dioxin organic micro-pollutant on-line detecting system in a kind of practical flue gas | |
| US11454618B2 (en) | Coupled analytical instruments for dual mode FTIR/GC-FTIR | |
| US9696286B2 (en) | Vacuum ultraviolet absorption spectroscopy system and method | |
| CN105136958B (en) | VOCs concentration on-line monitoring devices | |
| CN205691507U (en) | The highly sensitive quantitative testing device of heavy metal element in a kind of atmospheric aerosol | |
| CN103336070B (en) | The pick-up unit of sulfur-bearing failure gas component and method in a kind of quantitative detection sulfur hexafluoride electrical equipment | |
| Liao et al. | Secondary organic aerosol formation of fleet vehicle emissions in China: potential seasonality of spatial distributions | |
| CN205786518U (en) | Dioxin organic micro-pollutant on-line detecting system in actual flue gas | |
| CN102914530A (en) | Raman spectrum gas detection system as well as detection method and application thereof | |
| Carlin et al. | Forensic applications of gas chromatography | |
| Lee et al. | Resolving ambient organic aerosol formation and aging pathways with simultaneous molecular composition and volatility observations | |
| CN106290590A (en) | Minimum gas optoacoustic spectroscopy and chromatograph joint used instrument and the method for analysis in insulating oil | |
| CN205280707U (en) | VOCs tail gas witnessed inspections evaluation device is discharged in industry | |
| Vogel et al. | Aerosol chemistry resolved by mass spectrometry: Linking field measurements of cloud condensation nuclei activity to organic aerosol composition | |
| Watson et al. | Air monitoring: New advances in sampling and detection | |
| CN109324144B (en) | Volatile organic compound double-cold-trap sample introduction unit, sample introduction system and method | |
| CN104880434A (en) | Detection device and method for weak absorbing gas in complex environment | |
| CN204679877U (en) | Pollution source VOC concentration and total emission volumn real-time monitoring system | |
| CN209182227U (en) | Atmospheric analysis detection system based on DOAS and LIBS technology | |
| CN110208074A (en) | A kind of Volatile Organic Compounds in Soil device for fast detecting and its detection method | |
| CN110412017A (en) | A kind of spectrum detection device and its method of haze elemental composition | |
| Chen et al. | Applications of environmental mass spectrometry in atmospheric haze chemistry | |
| CN205091251U (en) | High integrated CEMS normal position analysis appearance system | |
| CN206378474U (en) | For transmission line system between the gaschromatographic mass spectrometry of dioxin on-line checking | |
| CN109270004B (en) | Atmospheric analysis detection system and detection method based on DOAS and LIBS technologies |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |