CN209460085U - VOCs ingredient on-line analysis equipment in Atmospheric particulates - Google Patents
VOCs ingredient on-line analysis equipment in Atmospheric particulates Download PDFInfo
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- CN209460085U CN209460085U CN201822256426.XU CN201822256426U CN209460085U CN 209460085 U CN209460085 U CN 209460085U CN 201822256426 U CN201822256426 U CN 201822256426U CN 209460085 U CN209460085 U CN 209460085U
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Abstract
The utility model provides VOCs ingredient on-line analysis equipment in a kind of Atmospheric particulates, and the on-line analysis equipment includes: gas cylinder, particulate matter gas source, Weighing module, light heating module, electric heating module, refrigeration module, aspiration pump and PTR mass spectrum.The utility model can online detect VOCs ingredient in particulate matter, and real-time is preferable, and detect fast speed.Meanwhile the utility model carries out particulate matter dissociation using light heating and electrically heated mode, and is detected using proton translocation mass spectrum (PTR), reduces the influence of fragment peak, ensure that the accuracy of measurement result.
Description
Technical field
The utility model relates to VOCs ingredients in VOCs analysis technical field more particularly to a kind of Atmospheric particulates to divide online
Desorption device.
Background technique
In order to be monitored to air quality, it is often necessary to analyze the VOCs contained in Atmospheric particulates.VOCs
(volatile organic compounds) refers to volatile organic matter, refers to that saturated vapor pressure is greater than under room temperature
Boiling point is in 50~260 DEG C of organic compounds below under 133.32Pa, normal pressure, or it is any at normal temperatures and pressures can volatilization it is organic
Solid or liquid, harm to the human body are larger.In order to which the specific ingredient to VOCs is analyzed, current method is mainly acquired
The atmosphere gas sample of measurement point, then takes back in laboratory and is analyzed, and real-time is poor, and complicated operation, is unfavorable for
The quick analysis of the VOCs ingredient contained in Atmospheric particulates.Therefore, in view of the above-mentioned problems, it is necessary to propose further to solve
Scheme.
Utility model content
The utility model is intended to provide VOCs ingredient on-line analysis and equipment in a kind of Atmospheric particulates, existing to overcome
There is deficiency present in technology.
In order to solve the above technical problems, the technical solution of the utility model is:
VOCs ingredient on-line analysis in a kind of Atmospheric particulates comprising:
Within the t1 period, the particulate matter of the predetermined size in air filtering is crossed, and filtered air is passed into PTR matter
In spectrum, the basic ingredient in air is measured, while measuring the quality m1 of the particulate matter filtered out；
Within the t2 period, it is continually fed into filtered air, filtered air is heated, makes wherein pass through filter membrane
Fine particle dissociation, basic ingredient in PTR mass-spectrometer measurement air and the VOCs to be volatilized by the fine particle of heating at
Point, while measuring the quality m2 of the particulate matter filtered out；
Within the t3 period, stopping is passed through air, blows dry gas to the particulate matter being obtained by filtration, and measures mistake after drying
The quality m3 of the particulate matter of filter；
Within the t4 period, light heating is carried out to the particulate matter of filtering so that the VOCs in particulate matter volatilizees, further into
After row electric heating dissociation, Cold trap condensing, PTR mass spectrum measures VOCs ingredient in Atmospheric particulates, while measuring and heating by light excessively
The quality m4 of remaining particulate matter after dissociation；
Wherein, (m3-m4)/m3 is the accounting of VOCs in particulate matter, and using the result of PTR mass-spectrometer measurement to airborne particulate
The ingredient of VOCs is assessed in object.
In order to solve the above technical problems, the technical solution of the utility model is:
VOCs ingredient on-line analysis equipment in a kind of Atmospheric particulates comprising: gas cylinder, particulate matter gas source, Weighing module,
Light heating module, electric heating module, refrigeration module, aspiration pump and PTR mass spectrum；
The gas cylinder and particulate matter gas source pass through the input end that pipeline is connected to the Weighing module, the weighing mould respectively
Block includes: filter membrane, lower chamber, conical pipe, and the filter membrane is located at the entrance of the lower chamber, the conical pipe be located at it is described under
The exit of cavity, the smooth heating module are arranged towards the filter membrane, and the outlet end of the Weighing module is connected by pipeline
To the PTR mass spectrum, the electric heating module and refrigeration module be set to the Weighing module outlet end and PTR mass spectrum it
Between, the aspiration pump is connected between the outlet end and electric heating module of the Weighing module by pipeline.
Preferably, the gas cylinder, which is connected on the pipeline of the input end of the Weighing module, is provided with the first solenoid valve, institute
It states and is provided with second solenoid valve on the pipeline for the input end that particulate matter gas source is connected to the Weighing module, the aspiration pump connection
Third solenoid valve is provided on to the pipeline between the outlet end and electric heating module of the Weighing module.
Preferably, the particulate matter gas source is atmosphere or the smoke chamber that can generate particle.
Preferably, it is provided on the pipeline for the input end that the particulate matter gas source is connected to the Weighing module to partial size model
Enclose the cutting head for carrying out selection.
Preferably, the smooth heating module includes: the lid being fastened on the Weighing module and is set to the lid
The LED light being arranged on the medial surface of body and towards the filter membrane.
Preferably, the medial surface be inclined-plane, the LED light be it is multiple, multiple LED light are equidistantly circumferentially distributed in institute
It states on inclined-plane.
Preferably, the on-line analysis equipment further include: the first cushion chamber and the second cushion chamber, the gas cylinder, particulate matter
Gas source, Weighing module input end be commonly connected on first cushion chamber, the outlet end of the Weighing module, aspiration pump,
PTR mass spectrum is commonly connected on second cushion chamber.
Preferably, the electric heating module includes heater strip, and the refrigeration module includes: multi-lager semiconductor cooling piece, sets
The heat carrier and capillary stainless steel tube that are placed on multi-lager semiconductor cooling piece, the ceramic heat block being set on the heat carrier.
Preferably, the on-line analysis equipment further includes the water pot being connected on the PTR mass spectrum.
Compared with prior art, the utility model has the beneficial effects that the utility model can be online in particulate matter
VOCs ingredient is detected, and real-time is preferable, and detects fast speed.Meanwhile the utility model is added using light heating and electricity
The mode of heat carries out particulate matter dissociation, and is detected using proton translocation mass spectrum (PTR), and the influence of fragment peak is reduced, and protects
The accuracy of measurement result is demonstrate,proved.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments recorded in the utility model, for those of ordinary skill in the art, is not making the creative labor
Under the premise of, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is the floor map of VOCs ingredient on-line analysis equipment in the Atmospheric particulates of the utility model.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
The utility model provides VOCs ingredient on-line analysis in a kind of Atmospheric particulates comprising following steps:
Within the t1 period, the particulate matter of the predetermined size in air filtering is crossed, and filtered air is passed into PTR matter
In spectrum, the basic ingredient in air is measured, while measuring the quality m1 of the particulate matter filtered out；
Within the t2 period, it is continually fed into filtered air, filtered air is heated, makes wherein pass through filter membrane
Fine particle dissociation, basic ingredient in PTR mass-spectrometer measurement air and the VOCs to be volatilized by the fine particle of heating at
Point, while measuring the quality m2 of the particulate matter filtered out；
Within the t3 period, stopping is passed through air, blows dry gas to the particulate matter being obtained by filtration, and measures mistake after drying
The quality m3 of the particulate matter of filter；
Within the t4 period, light heating is carried out to the particulate matter of filtering so that the VOCs in particulate matter volatilizees, further into
After row electric heating dissociation, Cold trap condensing, PTR mass spectrum measures VOCs ingredient in Atmospheric particulates, while measuring and heating by light excessively
The quality m4 of remaining particulate matter after dissociation；
Wherein, (m3-m4)/m3 is the accounting of VOCs in particulate matter, and using the result of PTR mass-spectrometer measurement to airborne particulate
The ingredient of VOCs is assessed in object.
To which the difference by calculating m4 and m3 can obtain the quality of VOCs in particulate matter；It can commonly be obtained by PTR
Obtain the ingredient of VOCs；By calculating the of poor quality of m3 and m2, the moisture content in particulate matter can be obtained.When being assessed, specifically
Representative air quality can be evaluated etc. according to the ingredient of the VOCs of PTR mass-spectrometer measurement.
In addition, it should be noted that, t1, t2, t3, t4 are the continuous period, i.e. t2 is originated at the end of the t1, from t3
Terminate when the beginning.When needing uninterrupted measurement, two identical parts may make to work at the same time, meets at this time: t3+t4 < t1+
T2, wherein the time span of t1 can be equal to the time span of t2.
As shown in Figure 1, the utility model also provides VOCs ingredient on-line analysis equipment in a kind of Atmospheric particulates, packet
Include: gas cylinder 1, particulate matter gas source, Weighing module, light heating module, electric heating module 13, refrigeration module 14, aspiration pump 17 and
PTR mass spectrum 19.
The gas source is connected to the input end of the Weighing module by pipeline for providing dry gas.It is described dry
Pathogenic dryness body is preferably helium, and chemical property is stablized, cannot participate in reaction, influence testing result.Correspondingly, the gas cylinder 1 connects
It is connected on the pipeline of the input end of the Weighing module and is provided with the first solenoid valve 2.
The particulate matter gas source is for providing the gas sample to be detected containing particulate matter, according to the source of gas sample, the particle
Object gas source either can provide the smoke chamber 4 of particulate matter by reaction for atmosphere.The particulate matter gas source passes through pipeline
It is connected to the input end of the Weighing module.Correspondingly, the particulate matter gas source is connected to the input end of the Weighing module
Second solenoid valve 5 is provided on pipeline.
The Weighing module is for realizing filtering and weigh.Specifically, the primary structure of the Weighing module are as follows: filter membrane 9,
Lower chamber 10, conical pipe 11.
Wherein, the filter membrane 9 is located at the entrance of the lower chamber 10, and the filter membrane 9 is quartz filter 9.At this point, partial size
Can be by filter membrane 9 for the particle of 100nm, and then ensure that the particle entrapment of 2.5um-100nm on filter membrane 9.The taper
Pipe 11 is located at the exit of the lower chamber 10.
The measuring principle of the Weighing module is based on trace oscillating balance method.Specifically, trace oscillating balance method is in matter
An oscillation hollow conical pipe 11 is used in quantity sensor, replaceable filter membrane 9 is installed in its vibration end, frequency of oscillation depends on
11 feature of conical pipe and its quality.When sampling air flow is by filter membrane 9, particulate matter therein is deposited on filter membrane 9, the matter of filter membrane 9
Amount variation leads to the variation of frequency of oscillation, and the quality for being deposited on particulate matter on filter membrane 9 is calculated by frequency of oscillation variation.Due to
It belongs to a kind of existing measurement method, and the utility model does not describe to it in detail.
It is provided on the pipeline for the input end that the particulate matter gas source is connected to the Weighing module and particle size range is carried out
The cutting head 3 of selection.Wherein, the cutting head 3 realizes the selection to partial size by the pumping speed of itself.The cutting head 3 is existing
Some products, such as model can be used with the cutting head 3 for URG-2000-30ED.
The smooth heating module is arranged towards the filter membrane 9, is used to add the particulate matter progress light being trapped on filter membrane 9
Heat.In this way, entering in PTR mass spectrum 19 and being detected so that the VOCs in particulate matter volatilizees.Meanwhile VOCs will not be destroyed
Ingredient, ensure that the accuracy of measurement result.
In one embodiment, the smooth heating module includes: the lid 7 being fastened on the Weighing module and sets
The LED light 8 for being placed on the medial surface of the lid 7 and being arranged towards the filter membrane 9.It is described interior in order to guarantee the uniform of heating
Side is inclined-plane, the LED light 8 be it is multiple, multiple LED light 8 are equidistantly circumferentially distributed on the inclined-plane.Preferably, tiltedly
The angle in face is 45 °, and the quantity of LED light 8 is 8.
The outlet end of the Weighing module is connected to the PTR mass spectrum 19, the electric heating module 13 and system by pipeline
Cold module 14 is set between the outlet end of the Weighing module and PTR mass spectrum 19.
Wherein, the electric heating module 13 is for heating the particulate matter by filter membrane 9, so that VOCs volatilizees,
Composition detection is carried out in PTR mass spectrum 19 to enter.The electric heating module 13 includes heater strip.The refrigeration module 14 is used for
It first passes through refrigeration and realizes organic matter condensation, then evaporated again by heating, to enter mass spectrum in next step.Specifically,
The refrigeration module 14 is a kind of cold-trap structure comprising: multi-lager semiconductor cooling piece is set on multi-lager semiconductor cooling piece
Heat carrier and capillary stainless steel tube, the ceramic heat block that is set on the heat carrier.To which organic matter is condensable to stainless
In steel wool tubule wall.
The aspiration pump 17 is connected to the Weighing module by pipeline for gas sample to be pumped into PTR mass spectrum 19
Outlet end and electric heating module 13 between.Correspondingly, the aspiration pump 17 is connected to outlet end and the electricity of the Weighing module
Third solenoid valve 16 is provided on pipeline between heating module 13.
In order to guarantee the stability of air-flow, the on-line analysis equipment further include: the first cushion chamber 6 and the second cushion chamber
12.At this point, the input end of the gas cylinder 1, particulate matter gas source, Weighing module is commonly connected on first cushion chamber 6, it is described
The outlet end of Weighing module, aspiration pump 17, PTR mass spectrum 19 are commonly connected on second cushion chamber 12.
The on-line analysis equipment further includes the water pot 18 being connected on the PTR mass spectrum 19, and is located at the PTR matter
Compose the mass flowmenter 15 on 19 inlet tubes.
When VOCs ingredient on-line analysis equipment works in the Atmospheric particulates of the utility model:
Firstly, the first solenoid valve 2 is closed, second solenoid valve 5 is opened, third solenoid valve 16 is opened, aspiration pump 17 is opened, light
Heating module is closed, and electric heating block is closed, and refrigeration module 14 opens concentration, Weighing module on-line measurement particle concentration.When t1
Between after, VOC is volatized into PTR mass spectrum 19.PTR mass spectrum 19 obtains gas data under normal circumstances, and Weighing module obtains particulate matter
Quality m1.
Then, the first solenoid valve 2 is closed, second solenoid valve 5 is opened, third solenoid valve 16 is opened, and aspiration pump 17 is opened, light
Heating module is closed, and electric heating block is opened, and refrigeration module 14 opens concentration, Weighing module on-line measurement particle concentration.When t2
Between after, VOC is volatized into PTR mass spectrum 19.PTR mass spectrum 19 obtains VOCs data under fine grained+normal condition, and Weighing module obtains
Particulate matter quality m2.
Then, the first solenoid valve 2 is opened, second solenoid valve 5 is closed, third solenoid valve 16 is closed, and aspiration pump 17 is closed, light
Heating module is closed, and electric heating block is closed, and refrigeration module 14 opens concentration, Weighing module on-line measurement particle concentration.When t3
Between after, VOC is volatized into PTR mass spectrum 19.PTR mass spectrum 19 obtains VOCs data under fine grained+normal condition, and Weighing module obtains
Particulate matter quality m3 after drying.
Finally, the first solenoid valve 2 is opened, second solenoid valve 5 is closed, third solenoid valve 16 is closed, aspiration pump 17 is closed, light
Heating module is opened, and electric heating block is opened, and refrigeration module 14 opens concentration, Weighing module on-line measurement particle concentration.When t4
Between after, VOC is volatized into PTR mass spectrum 19.PTR mass spectrum 19 obtains VOCs data in particulate matter, and Weighing module obtains VOCs volatilization
Particulate matter quality m4 afterwards.
In conclusion the utility model can online detect VOCs ingredient in particulate matter, real-time is preferable, and
Detect fast speed.Meanwhile the utility model carries out particulate matter dissociation using light heating and electrically heated mode, and utilizes proton
Transfer mass spectrum (PTR) is detected, and is reduced the influence of fragment peak, be ensure that the accuracy of measurement result.
It is obvious to a person skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and
And without departing substantially from the spirit or essential attributes of the utility model, it can realize that this is practical new in other specific forms
Type.Therefore, in all respects, the present embodiments are to be considered as illustrative and not restrictive, this is practical new
The range of type is indicated by the appended claims rather than the foregoing description, it is intended that containing for the equivalent requirements of the claims will be fallen in
All changes in justice and range are embraced therein.It should not treat any reference in the claims as limiting
Related claim.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped
Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should
It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
The other embodiments being understood that.
Claims (9)
1. VOCs ingredient on-line analysis equipment in a kind of Atmospheric particulates, which is characterized in that the on-line analysis equipment includes: gas
Bottle, particulate matter gas source, Weighing module, light heating module, electric heating module, refrigeration module, aspiration pump and PTR mass spectrum；
The gas cylinder and particulate matter gas source pass through the input end that pipeline is connected to the Weighing module, the Weighing module packet respectively
Include: filter membrane, lower chamber, conical pipe, the filter membrane are located at the entrance of the lower chamber, and the conical pipe is located at the lower chamber
Exit, the smooth heating module is arranged towards the filter membrane, and the outlet end of the Weighing module is connected to institute by pipeline
PTR mass spectrum is stated, the electric heating module and refrigeration module are set between the outlet end of the Weighing module and PTR mass spectrum, institute
Aspiration pump is stated to be connected between the outlet end and electric heating module of the Weighing module by pipeline.
2. VOCs ingredient on-line analysis equipment in Atmospheric particulates according to claim 1, which is characterized in that the gas cylinder
It is connected on the pipeline of the input end of the Weighing module and is provided with the first solenoid valve, the particulate matter gas source is connected to the title
Be provided with second solenoid valve on the pipeline of the input end of molality block, the aspiration pump be connected to the Weighing module outlet end and
Third solenoid valve is provided on pipeline between electric heating module.
3. VOCs ingredient on-line analysis equipment in Atmospheric particulates according to claim 1, which is characterized in that the particle
Object gas source is atmosphere or the smoke chamber that can generate particle.
4. VOCs ingredient on-line analysis equipment in Atmospheric particulates according to claim 1, which is characterized in that the particle
Object gas source is connected to the cutting head for being provided on the pipeline of the input end of the Weighing module and carrying out selection to particle size range.
5. VOCs ingredient on-line analysis equipment in Atmospheric particulates according to claim 1, which is characterized in that the light adds
Thermal modules include: on the lid being fastened on the Weighing module and the medial surface for being set to the lid and towards the filter
The LED light of film setting.
6. VOCs ingredient on-line analysis equipment in Atmospheric particulates according to claim 5, which is characterized in that the inside
Face is inclined-plane, the LED light be it is multiple, multiple LED light are equidistantly circumferentially distributed on the inclined-plane.
7. VOCs ingredient on-line analysis equipment in Atmospheric particulates according to claim 1, which is characterized in that described online
Analytical equipment further include: the first cushion chamber and the second cushion chamber, the gas cylinder, particulate matter gas source, the input end of Weighing module are total
With being connected on first cushion chamber, the outlet end of the Weighing module, aspiration pump, PTR mass spectrum are commonly connected to described the
On two cushion chambers.
8. VOCs ingredient on-line analysis equipment in Atmospheric particulates according to claim 1, which is characterized in that the electricity adds
Thermal modules include heater strip, and the refrigeration module includes: multi-lager semiconductor cooling piece, is set on multi-lager semiconductor cooling piece
Heat carrier and capillary stainless steel tube, the ceramic heat block being set on the heat carrier.
9. VOCs ingredient on-line analysis equipment in Atmospheric particulates according to claim 1, which is characterized in that described online
Analytical equipment further includes the water pot being connected on the PTR mass spectrum.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201822256426.XU CN209460085U (en) | 2018-12-29 | 2018-12-29 | VOCs ingredient on-line analysis equipment in Atmospheric particulates |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201822256426.XU CN209460085U (en) | 2018-12-29 | 2018-12-29 | VOCs ingredient on-line analysis equipment in Atmospheric particulates |
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| CN209460085U true CN209460085U (en) | 2019-10-01 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109459337A (en) * | 2018-12-29 | 2019-03-12 | 阜阳师范学院 | VOCs ingredient on-line analysis and equipment in Atmospheric particulates |
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2018
- 2018-12-29 CN CN201822256426.XU patent/CN209460085U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109459337A (en) * | 2018-12-29 | 2019-03-12 | 阜阳师范学院 | VOCs ingredient on-line analysis and equipment in Atmospheric particulates |
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