CN209132061U - A kind of VOC dilution sampling device - Google Patents
A kind of VOC dilution sampling device Download PDFInfo
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- CN209132061U CN209132061U CN201821833925.4U CN201821833925U CN209132061U CN 209132061 U CN209132061 U CN 209132061U CN 201821833925 U CN201821833925 U CN 201821833925U CN 209132061 U CN209132061 U CN 209132061U
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Abstract
The utility model discloses a kind of VOC dilution sampling devices, including heating sampling gun apparatus, dilution device, chamber and multi-channel sampling device；The entrance of the dilution device is connected to heating sampling gun apparatus, and the outlet of the dilution device is connected to by chamber with multi-channel sampling device, and exhaust gas enters chamber after dilution device dilutes and is further uniformly mixed, then is discharged by multi-channel sampling device.The device of the utility model can carry out spot sampling to the exhaust gas discharge that high concentration easily condenses, and avoid the problems such as mode excessive concentration directly sampled causes VOC loss, sampling apparatus damage or analysis is difficult.Using two pole dilution systems, dilution ratio can be selected according to different exhaust concentrations, provide condition for higher VOC concentration field dilution sampling, while providing condition for more device synchronized samplings.
Description
Technical field
The utility model relates to a kind of sampling apparatus, in particular to a kind of VOC dilution sampling device belongs to environment monitor
Device technical field.
Background technique
The VOC concentration of industrial enterprise's exhaust tube direct emission is higher, if directly sampled using Soviet Union's code tank, be easy to cause
VOC condensing droplet is adsorbed on tank inner surface, causes sample loss, while the Soviet Union's Ma tank for also be easy to causeing sampling to use is dirty
It contaminates, be difficult to thoroughly clean up, influence sample next time and acquire.
Portion discharge cylinder temperature is higher, if directly sampled using Soviet Union's Ma tank with Tenax adsorption tube sampling apparatus, it is also possible to
Cause the Soviet Union's sample devices such as Ma tank or Tenax adsorption tube damage.
After collecting high concentration VOC gas, to avoid causing VOC to exist due to VOC sample introduction excessive concentration in the analysis process
It is remained in chromatographic column, need to select a variety of dilution proportions in sample analysis and attempts to analyze, sample size is caused to increase, analyzed
Efficiency reduces.
Since aldehyde ketone substance is easily lost in gas tank, this kind of compound is generally acquired by absorption method, in Part load
It needs simultaneously using Soviet Union's Ma tank, Tenax adsorption tube sampling apparatus and aldehyde ketone substance sampling apparatus, therefore just needs more samplers
It samples simultaneously, but exhaust tube detection mouth opening is smaller, does not allow multiple sampling guns while placing, therefore, it is necessary to design a set of system
System meets the needs of Multi-example synchronous acquisition.
Utility model content
In order to overcome at least one of the drawbacks of the prior art described above, providing one kind can be in various exhaust for the utility model
The VOC dilution device of mouth spot sampling, solves VOC excessive concentration or the excessively high difficulty caused by sampling of temperature, and protection sampling is set
It is standby, the synchronism and stability of Multi-example acquisition, and adjustable dilution ratio are improved, suitable for the useless containing VOC of various concentration
Gas sampling.
In order to solve the above technical problems, the utility model offer technical solution is as follows:
A kind of VOC dilution sampling device, including heating sampling gun apparatus, dilution device, chamber and multi-channel sampling fill
It sets；The entrance of the dilution device is connected to heating sampling gun apparatus, and the outlet of the dilution device passes through chamber and multi-pass
The connection of road sampling apparatus, exhaust gas enters chamber after dilution device dilutes and is further uniformly mixed, then is adopted by multichannel
Sampling device discharge.
Further, the heating sampling gun apparatus includes probe tube, heating mantle and temperature control equipment, and heating mantle is covered
It covers in sampling pipe surface, and is connected with temperature control equipment, while also setting up gas vent on probe tube, the gas vent is logical
Piping is connected to dilution device.
Further, the dilution device includes dilution tunnel, diluent gas receiving bottle；Diluent gas is in specified pressure
Under be passed through dilution tunnel, the exhaust gas of the heated sampling gun apparatus of the synchronous sucking of dilution tunnel, diluent gas and exhaust gas are logical in dilution
It being mixed in road, the dilution tunnel is exported equipped with excess air, and excess air is exported from the gas excess air and is discharged,
Its mixed gas fully enters chamber.
Further, the dilution tunnel be equipped with level-one, second level or multistage, dilution tunnels at different levels respectively with diluent gas
It accommodates bottle to be connected, after the dilution of afterbody dilution tunnel, closes the outlet of afterbody dilution tunnel excess air.
Further, the diluent gas is the background air after nitrogen or filtration of particulate matters.
Further, the dilution tunnel is Dekati jet stream dilution tunnel.
Further, the chamber is stainless steel material production, and the inner wall of the chamber is coated with Teflon coating.
Further, the multi-channel sampling device includes 3 sampling channels and 1 excess air channel；Wherein,
1 sampling channel includes valve and Soviet Union's code tank sampling apparatus, and the 2nd article of sampling channel includes valve and Tenax adsorption tube sampling cartridge
It sets, the 3rd article of sampling channel includes valve and aldehyde ketone substance sampling apparatus；Excessive gas is discharged from excess air channel.
Compared with prior art, VOC dilution sampling device described in the utility model can be to high concentration for the utility model
The exhaust gas discharge easily condensed carries out spot sampling, and the mode excessive concentration directly sampled is avoided to cause VOC loss, sampling apparatus damage
The problems such as bad or analysis is difficult.Using two pole dilution systems, dilution ratio can be selected according to different exhaust concentrations, be higher
VOC concentration field dilution sampling condition is provided, while providing condition for more device synchronized samplings.It is described in the utility model
VOC dilution sampling device can directly collect the waste gas sample of moderate concentration, reduce the losses such as VOC condensation, absorption, and can be carried out
Multi-channel synchronal sampling.
Detailed description of the invention
Fig. 1 is the utility model overall structure diagram.
Marked in the figure: 1, probe tube；2, heating mantle；3, temperature controller；4, compressed nitrogen；5, level-one dilution system pressure
Regulating valve；6, two-stage dilution system pressure-regulating valve；7, level-one dilution tunnel；8, level-one dilution tunnel excess air gas outlet；
9, secondary dilution channel；10, secondary dilution channel excess air gas outlet；11, chamber；12, valve one；13 valves two；14,
Valve three；15, valve four；16, Soviet Union's Ma tank sampling apparatus；17, Tenax adsorption tube sampling apparatus；18, aldehyde ketone substance sampling cartridge
It sets.
Specific embodiment
In order to deepen the understanding to the utility model, the utility model is made below in conjunction with embodiment and attached drawing further
It is described in detail, changes embodiment and be only used for explaining the utility model, do not constitute the restriction to scope of protection of the utility model.
Referring to Fig. 1, the utility model designs a kind of VOC dilution sampling device, including heating sampling gun apparatus, dilution dress
It sets, chamber and multi-channel sampling device.The device specifically includes probe tube 1, heating mantle 2, temperature controller 3, compressed nitrogen
4, level-one dilution system pressure-regulating valve 5, two-stage dilution system pressure-regulating valve 6, level-one dilution tunnel 7, level-one dilution tunnel
Excess air gas outlet 8, secondary dilution channel 9, secondary dilution channel excess air gas outlet 10, chamber 11, valve 1,
Valve 2 13, valve 3 14, valve 4 15, Soviet Union Ma tank sampling apparatus 16, Tenax adsorption tube sampling apparatus 17, aldehyde ketone substance
Sampling apparatus 18.Wherein heating sampling gun apparatus insertion exhaust tube in, exhaust gas after dilution device dilutes enter chamber into
One step is uniformly mixed, then is discharged by multi-channel sampling device.
Gas sample tube 1 is inserted into exhaust tube, and exhaust gas enters probe tube 1, and heating mantle 2 is wrapped in 1 outside of probe tube, with temperature
Controller 3 to be spent to be connected, temperature controller 3 is used to adjust heating device,.Installation resistance and resistance connecting wire in heating mantle 2, outside
Side covers asbestos insulating layer, and connecting wire is connected with temperature controller.The sampled pipe 1 of waste gas stream, heated 2 heated constant temperature of set
Afterwards, it is connected to dilution system.The heating sampling gun apparatus utilizes heating mantle and temperature controller, extremely by exhaust gas heated constant temperature
180 degrees Celsius, reach European standard.
The dilution tunnel can be diluted only with level-one, i.e. the excess air outlet of closing level-one dilution tunnel, close two
The compressed nitrogen entrance and excess air of grade dilution tunnel export, and are passed directly into chamber.Dilution system can also be used multistage dilute
It releases.The utility model is illustrated by taking two-stage dilution channel as an example.
Compressed nitrogen is after barometer is adjusted, with the constant input dilution tunnel of specified pressure, to obtain determining thinner ratio, by
Negative pressure is generated after being passed through nitrogen in dilution tunnel, exhaust gas is inhaled into level-one dilution tunnel.
Exhaust gas is inhaled into level-one dilution tunnel 7, mixes with for diluted compressed nitrogen, compressed nitrogen is by compressed nitrogen gas cylinder
4 provide, and enter dilution tunnel 4 through level-one diluent nitrogen air inlet by pressure-regulating device 5, flow into next stage through dilution exhaust gas
Dilution tunnel, excessive gas are discharged from level-one dilution tunnel excess air gas outlet 8.
Enter secondary dilution channel 9 through the diluted exhaust gas of the first order, specific dilution and similar, the compressed nitrogen of level-one dilution
Gas leads to multiple pressure apparatus for adjusting force 6 and enters secondary dilution channel 9, enters chamber 11 through secondary dilution exhaust gas, and it is dilute to be equipped with second level
Channel excess air gas outlet 10 is released, it can be from this discharge if any excess air.
Enter chamber 11 through secondary dilution exhaust gas, after stopping, exhaust gas enters multi-channel sampling device after dilution.
Preferably, the dilution tunnel of the utility model uses Dekati jet stream dilution tunnel, and thinner ratio is led to dilution is entered
The compressed nitrogen pressure in road is related, and adjusting this pressure is 1 atmospheric pressure, and single-stage, which dilutes, can get 7.62 times of thinner ratios, adopts simultaneously
58.06 times can be diluted with two-stage dilution channel.The VOC dilution system of the utility model is surveyed first with TVOC analyzer before sampling
Determine non-methane total hydrocarbons concentration in exhaust gas, according to measurement concentration, selection uses level-one or secondary dilution channel, so that non-methane total hydrocarbons
Exit concentration between 0.5-6mg/m3, be convenient for subsequent sample analysis.
Preferably, chamber is stainless steel case, and volume 10L, inside is coated with Teflon coating to reduce VOC absorption damage
It loses.Gas is connected after chamber with multi-channel sampling device after dilution.
Multi-channel sampling device includes that three sampling channels and an excess air channel, each channel are respectively provided with valve.
Exhaust gas is through valve 1, connection Soviet Union Ma tank sampling apparatus 16 in one of sampling channel；Wherein give up in second sampling channel
Gas connects Tenax adsorption tube sampling apparatus 17 through valve 2 13；Wherein exhaust gas is through valve 3 14 in third sampling channel, even
Connect aldehyde ketone substance sampling apparatus 18；4th channel is excess air channel, and excessive gas is discharged through valve 4 15.
In the utility model, as the nitrogen of diluent gas, the background air after can be replaced filtration of particulate matters is as dilute
Outgassing.Analysis simultaneously is calculated according to thinner ratio and is vented through VOC species concentration in dilution exhaust gas VOC species concentration and background air
VOC species concentration in cylinder discharge exhaust gas.
In conclusion the utility model relates to a kind of VOC dilution sampling device, including heating sampling gun apparatus, dilution dress
It sets, chamber and multi-channel sampling device.The dilution tunnel samples gun apparatus, chamber and multi-channel sampling with heating respectively
Device connection, exhaust gas enters chamber after dilution device dilutes and is further uniformly mixed, then passes through multi-channel sampling device
Discharge, the utility model can directly sample high VOC concentration waste gas.
The above is preferred embodiments of the present invention, it is noted that for those of ordinary skill in the art
For, other various forms of modifications, equivalent replacement, improvement etc. can also be made on the basis of the above description, should all include
It is within the protection scope of the utility model.
Claims (8)
1. a kind of VOC dilution sampling device, it is characterised in that: including heating sampling gun apparatus, dilution device, chamber and multi-pass
Road sampling apparatus；The entrance of the dilution device is connected to heating sampling gun apparatus, and the outlet of the dilution device passes through stop
Room is connected to multi-channel sampling device, and exhaust gas enters chamber after dilution device dilutes and is further uniformly mixed, then passes through
The discharge of multi-channel sampling device.
2. a kind of VOC dilution sampling device according to claim 1, it is characterised in that: the heating samples gun apparatus packet
Probe tube, heating mantle and temperature control equipment are included, heating mantle is covered on sampling pipe surface, and is connected with temperature control equipment, together
When probe tube on also set up gas vent, the gas vent is connected to by pipeline with dilution device.
3. a kind of VOC dilution sampling device according to claim 1, it is characterised in that: the dilution device includes dilution
Channel, diluent gas accommodate bottle；Diluent gas is passed through dilution tunnel under specified pressure, and the synchronous sucking of dilution tunnel is heated to adopt
The exhaust gas of sample gun apparatus, diluent gas and exhaust gas mix in dilution tunnel, and the dilution tunnel is exported equipped with excess air,
Excess air is exported from the gas excess air and is discharged, and other mixed gas fully enter chamber.
4. a kind of VOC dilution sampling device according to claim 3, it is characterised in that: the dilution tunnel be equipped with level-one,
Second level or multistage, dilution tunnels at different levels accommodate bottle with diluent gas respectively and are connected, after the dilution of afterbody dilution tunnel, close
Close the outlet of afterbody dilution tunnel excess air.
5. a kind of VOC dilution sampling device according to claim 3 or 4, it is characterised in that: the diluent gas is nitrogen
Or the background air after filtration of particulate matters.
6. a kind of VOC dilution sampling device according to claim 3 or 4, it is characterised in that: the dilution tunnel is
Dekati jet stream dilution tunnel.
7. a kind of VOC dilution sampling device according to claim 1, it is characterised in that: the chamber is stainless steel
Material production, the inner wall of the chamber are coated with Teflon coating.
8. a kind of VOC dilution sampling device according to claim 1, it is characterised in that: the multi-channel sampling device packet
Include 3 sampling channels and 1 excess air channel；Wherein, the 1st article of sampling channel include valve and Soviet Union code tank sampling apparatus, the 2nd
Sampling channel includes valve and Tenax adsorption tube sampling apparatus, and the 3rd article of sampling channel includes that valve and aldehyde ketone substance sample
Device；Excessive gas is discharged from excess air channel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821833925.4U CN209132061U (en) | 2018-11-07 | 2018-11-07 | A kind of VOC dilution sampling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821833925.4U CN209132061U (en) | 2018-11-07 | 2018-11-07 | A kind of VOC dilution sampling device |
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| Publication Number | Publication Date |
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| CN209132061U true CN209132061U (en) | 2019-07-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201821833925.4U Active CN209132061U (en) | 2018-11-07 | 2018-11-07 | A kind of VOC dilution sampling device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112781969A (en) * | 2019-11-06 | 2021-05-11 | 中国石油化工股份有限公司 | Gas dilution device and method for online monitoring |
| CN113092613A (en) * | 2021-03-31 | 2021-07-09 | 中国科学院生态环境研究中心 | Double-path non-blind area on-line analysis method for aldehyde ketone compounds in atmosphere |
-
2018
- 2018-11-07 CN CN201821833925.4U patent/CN209132061U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112781969A (en) * | 2019-11-06 | 2021-05-11 | 中国石油化工股份有限公司 | Gas dilution device and method for online monitoring |
| CN113092613A (en) * | 2021-03-31 | 2021-07-09 | 中国科学院生态环境研究中心 | Double-path non-blind area on-line analysis method for aldehyde ketone compounds in atmosphere |
| CN113092613B (en) * | 2021-03-31 | 2022-07-12 | 中国科学院生态环境研究中心 | Double-path non-blind area on-line analysis method for aldehyde ketone compounds in atmosphere |
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