CN206618736U - The on-line monitoring system of medium volatile organic matter in a kind of air - Google Patents
The on-line monitoring system of medium volatile organic matter in a kind of air Download PDFInfo
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- CN206618736U CN206618736U CN201720132801.2U CN201720132801U CN206618736U CN 206618736 U CN206618736 U CN 206618736U CN 201720132801 U CN201720132801 U CN 201720132801U CN 206618736 U CN206618736 U CN 206618736U
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 44
- 239000005416 organic matter Substances 0.000 title description 6
- 238000005070 sampling Methods 0.000 claims abstract description 52
- 238000001514 detection method Methods 0.000 claims abstract description 39
- 239000012855 volatile organic compound Substances 0.000 claims abstract description 14
- 238000002156 mixing Methods 0.000 claims abstract description 4
- 238000001179 sorption measurement Methods 0.000 claims description 55
- 238000010926 purge Methods 0.000 claims description 37
- 238000002485 combustion reaction Methods 0.000 claims description 23
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims description 13
- 239000013618 particulate matter Substances 0.000 claims description 12
- 230000002000 scavenging effect Effects 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 11
- 238000010438 heat treatment Methods 0.000 claims description 8
- 239000012528 membrane Substances 0.000 claims description 7
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 6
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 5
- 230000005611 electricity Effects 0.000 claims description 4
- -1 polytetrafluoroethylene Polymers 0.000 claims description 3
- 238000000197 pyrolysis Methods 0.000 claims description 3
- 239000010453 quartz Substances 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 239000012530 fluid Substances 0.000 claims description 2
- 239000011521 glass Substances 0.000 claims description 2
- AKHNMLFCWUSKQB-UHFFFAOYSA-L sodium thiosulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=S AKHNMLFCWUSKQB-UHFFFAOYSA-L 0.000 claims description 2
- 235000019345 sodium thiosulphate Nutrition 0.000 claims description 2
- 238000010408 sweeping Methods 0.000 claims description 2
- 230000001939 inductive effect Effects 0.000 claims 3
- 230000004888 barrier function Effects 0.000 claims 1
- 238000002329 infrared spectrum Methods 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 5
- 239000008246 gaseous mixture Substances 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 169
- 238000003860 storage Methods 0.000 description 7
- 239000000126 substance Substances 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 150000002894 organic compounds Chemical class 0.000 description 4
- 229920006395 saturated elastomer Polymers 0.000 description 4
- 239000000443 aerosol Substances 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000032683 aging Effects 0.000 description 2
- 238000009835 boiling Methods 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 239000012159 carrier gas Substances 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229910052734 helium Inorganic materials 0.000 description 2
- 239000001307 helium Substances 0.000 description 2
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 2
- 239000011261 inert gas Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 150000001335 aliphatic alkanes Chemical class 0.000 description 1
- 239000003708 ampul Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 150000001722 carbon compounds Chemical class 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002290 gas chromatography-mass spectrometry Methods 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
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- Sampling And Sample Adjustment (AREA)
Abstract
The utility model discloses the on-line monitoring method of medium volatile organic concentration in the monitoring air of a kind of on-line monitoring system for medium volatile organic compound and the application on-line monitoring system；The on-line monitoring system includes sampling device, dress sample and sampling apparatus and detection means；Described device can realize the continuous detection to medium volatile organic compound in air；The monitoring method is realized using above-mentioned on-line detecting system；The monitoring method comprises the following steps：(1) mixing of under test gas；(2) the continuous dress sample of gaseous mixture and sampling and detection.The on-line monitoring system is small-sized, simple to operate, cost is low；Pass through the detection of the on-line monitoring system, it can be realized that IVOC variation tendency in air.
Description
Technical field
The utility model is related to the monitoring system of trace gas in air, medium volatile in more particularly to a kind of air
The on-line monitoring system of organic matter.
Background technology
Because effective saturated concentration (C*) in an atmosphere is different, organic compound can be divided into following several classes：Half volatilizees
Property organic compound (semi-volatility organic compounds, SVOCs), its effective saturated concentration scope be 10-1
μg/m3＜ C* ＜ 103μg/m3；Medium volatile organic compound (intermediate-volatility organic
Compounds, IVOCs), its effective saturated concentration scope is 103μg/m3＜ C* ＜ 106μg/m3；VOC
(Volatile Organic Compounds, VOCs), its effective saturated concentration scope is C* ＞ 106μg/m3.It is domestic at present right
The measure of organic constituentses and content is primarily directed to VOCs, because VOCs boiling point is relatively low, typically at 50-250 DEG C, and saturation is steamed
Air pressure is at room temperature more than 133.32Pa.IVOCs due to its in an atmosphere boiling point it is higher, content is relatively low, for its outfield
Component and content detection, which are mainly, to be concentrated in aerosol particle thing.
IVOCs be secondary organic aerosol (secondary organic aerosols, SOAs) in air it is important before
Body thing, its volatility and C10-C22Straight chain polymer amount alkane it is suitable.Laboratory research shows that IVOCs can form high yield
SOAs, but its content in an atmosphere and the contribution to SOAs or indefinite.The domestic detection for being directed to gas phase IVOCs at present
What method was mainly taken is first individually to be sampled with adsorption tube, is then entered with pyrolysis analyzer and the GC-MS sample gathered to adsorption tube
The mode that parses offline of row, but its can not in real-time tracing air IVOCs change in concentration.So, develop a set of be directed to
IVOCs on-line monitoring system is still highly significant.
Utility model content
In order to solve the deficiencies in the prior art, the utility model provides medium volatile organic compound in a kind of air
On-line monitoring system, and Enrichment system (fill sample and sampling apparatus) auto-activation.
The utility model purpose is achieved by the following technical solution：
A kind of on-line monitoring system for medium volatile organic compound, the on-line monitoring system is filled comprising sample introduction
Put, fill sample and sampling apparatus and detection means；
The sampling device includes particulate matter and ozone removal device, gas mixer chamber, two gas flow rate controllers, the
One gas circuit pipeline, two magnetic valves, gas generating means and the first sampling pump；
The particulate matter and ozone removal device are connected with gas mixer chamber by the first gas circuit pipeline；The gas mixing
Room one end connects first gas flow speed controller, and the first gas flow speed controller passes through the first magnetic valve and the first sampling pump
It is connected；The other end of the gas mixer chamber is connected by the second magnetic valve with second gas flow speed controller, second gas
Rate of flow of fluid controller is connected with gas generating means；
The dress sample and sampling apparatus include two six-way valves, two adsorption tubes, purge gass holding vessel, third gas flow velocitys
Controller, the second sampling pump, connecting pipe road and five magnetic valves；
Gas mixer chamber in sampling device is connected by second gas pipeline with the first entrance A1 of the first six-way valve；Blow
Scavenging holding vessel is connected by the 3rd magnetic valve with the second entrance B1 of first six-way valve；The first of first six-way valve
Outlet E1 is connected by third gas pipeline with the first adsorption tube；First adsorption tube passes through the 4th gas piping and the first six-way valve
The 3rd entrance F1 be connected；3rd outlet first entrances of the C1 by the 5th gas piping and the second six-way valve of the first six-way valve
A2 is connected；The second outlet D1 of first six-way valve by the 4th magnetic valve respectively with the gas-detecting device and height in detection means
Warm combustion furnace is connected；
Purge gass holding vessel is connected by the 5th magnetic valve with the second entrance B2 of second six-way valve；Described 2nd 6
The first outlet E2 of port valve is connected by the 6th gas piping with the second adsorption tube；Second adsorption tube by the 7th gas piping with
3rd entrance F2 of the second six-way valve is connected；3rd outlet C2 of the second six-way valve passes through third gas flow speed controller and the 7th
Magnetic valve is connected；The other end of 7th magnetic valve connects the second sampling pump；The second outlet D2 of second six-way valve passes through the 6th electricity
Magnet valve is connected with the gas-detecting device and high temperature combustion furnace in detection means respectively；
The detection means includes capnograph, high temperature combustion furnace and gas-detecting device；The high-temp combustion
Stove is connected with capnograph.
In first six-way valve of the present utility model, using the entrance that is connected with second gas pipeline as first entrance A1, by suitable
Clockwise is followed successively by first outlet E1, second entrance B1, second outlet D1, the outlets of the 3rd entrance F1 and the 3rd C1.
In second six-way valve of the present utility model, using the entrance that is connected with the 5th gas piping as first entrance A2, by suitable
Clockwise is followed successively by first outlet E2, second entrance B2, second outlet D2, the outlets of the 3rd entrance F2 and the 3rd C2.
According to the utility model, the on-line monitoring system also includes blow device, and the blow device blows including gas
Pipeline purging road and blowback scavenging circuit, the gas purging circuit is that gas purging device passes through the 8th magnetic valve and the 4th gas stream
Fast controller is connected, and the 4th gas flow rate controller is connected in first gas pipeline；The blowback scavenging circuit is anti-
Blow device is connected with the gas-detecting device and high temperature combustion furnace in detection means respectively by the 9th magnetic valve.Wherein, institute
It is after pipeline uses a period of time, to carry out purging to pipeline with the gas purging device and clean to state purging circuit.Further,
The presence of the gas purging circuit and blowback scavenging circuit is for the pipeline to the pipeline in six-way valve, adsorption tube and correlation
Cleaned and served as carrier gas during detection, that is to say, that can both realize that the cleaning to adsorption tube can also be realized to gas
The zero point correction of detection means and capnograph.Preferably, the purge gas can be zero air, or helium,
The inert gases such as nitrogen.Wherein, zero described air refers to the clean air for being practically free of hydrocarbon.
According to the utility model, the on-line monitoring system also includes the first variable heater and the second variable heater；
First variable heater is used for the first six-way valve, the first adsorption tube and the pipe communicated therewith in dress sample and sampling apparatus
Heated on road；Second variable heater be used for dress sample and sampling apparatus in the second six-way valve, the second adsorption tube and
The pipeline communicated therewith is heated；The temperature of the variable heater can carry out gradient regulation；By adding to adsorption tube difference
The setting of hot temperature, different gaseous organic substances can be stayed in adsorption tube, realize the selective absorbing to gaseous organic substance.
According to the utility model, the on-line monitoring system also include constent temperature heater, the constent temperature heater be used for pair
First gas pipeline and gas mixer chamber are heated, and the temperature of the constent temperature heater is constant in a certain temperature, and purpose is to subtract
Few loss by low volatility gas in detector, that is, reduce low volatility gas absorption, parsing, the possibility of cohesion.
According to the utility model, the particulate matter and ozone removal device can use filter membrane removal device, remove gas
In particulate matter, filter membrane material can be polytetrafluoroethylene (PTFE), glass fibre or quartz in one or more；The particulate matter
And ozone removal device is to remove in gas entrained ozone, sodium thiosulfate (Na can be coated on filter membrane2S2O3)。
According to the utility model, the inwall of the gas mixer chamber is with one layer of inert material, and material can be glass, stone
English, polytetrafluoroethylene (PTFE) or stainless steel etc..The presence of the inert material is to prevent wall volatilization foreign gas；Meanwhile, gas with
Air enters gas mixer chamber, in the case where certain flow velocity drives, reaches uniform mixing.
According to the utility model, what the volume of the gas mixer chamber can be according to field observation environment and observation time will
Ask, be reasonably designed, scope is typically in 5~50L or so；The gas mixer chamber is used for the mixed of gas and gas to be detected
Close.
According to the utility model, the use of the gas flow rate controller and magnetic valve is the stream for adjusting each gas piping
Amount, the flow velocity of control gas, pumping flow velocity and the flow velocity by adsorption tube gas；The gas flow rate controller is selected from float stream
One kind in gauge, mass flowmenter, metering hole.
According to the utility model, the material of the gas circuit pipeline is generally inert material, and the gas piping for example can be
Stainless steel tube, quartz ampoule or teflon pipe etc. of the materials such as polyfluortetraethylene pipe, silica coating, the purpose is to prevent from rising
Pipeline volatilization foreign gas during temperature.
According to the utility model, department's configuration or use that the gas in the gas generating means can be through professional distribution
Anemostat and osmos tube etc., gas enter adsorption tube with detected gas, carry out stability when calibration instrument is detected and enter
Enter the loss of material in gas after adsorption tube.
According to the utility model, the sampling pump can be using membrane pump, piston pump and sliding vane rotary pump etc..
According to the utility model, the adsorption tube can be changed or cleaned according to actual requirement.
According to the utility model, the packing material in the adsorption tube can be set according to the target compound to be gathered,
Can be Tenax TA, carbon black etc.；The adsorption tube is alternatively the capillary of different coating.
According to the utility model, what the volume of the purge gass storage tank can be according to field observation environment and observation time will
Ask, be reasonably designed, scope is typically in 50~500L or so；The purge gass storage tank is used to store purge gass.
According to the utility model, detected gas can be under the drive of the second sampling pump, into six-way valve；The six-way valve can
Realize the gas circuit switching of gas collection, gas detection and pipeline cleaning.
According to the utility model, the constent temperature heater and the variable heater can use the heaters such as resistance, inductance,
Wherein resistance can be using structures such as heater strip, heating plates.
According to the utility model, the detection means is the gas that gas and high temperature combustion furnace to being collected in adsorption tube are exported
Body detected, wherein, the gas-detecting device is that the gas collected in adsorption tube is detected, the carbon dioxide point
Analyzer is that the gas that high temperature combustion furnace is exported is detected；The gas-detecting device can be capnograph, pyrolysis
Analyzer, mass spectrograph and/or infrared spectrometer etc..
According to the utility model, the high temperature combustion furnace is that object gas or gas are sufficiently burnt so that
Carbon compound is all exported with the gas form of carbon dioxide.
The beneficial effects of the utility model：
The utility model provides a kind of on-line monitoring system of medium volatile organic compound in air, and the system can
To realize the continuous detection to medium volatile organic compound in air；The system is small-sized, simple to operate, cost is low；It is logical
Cross the detection of the on-line monitoring system, it can be realized that IVOC variation tendency in air.
Brief description of the drawings
Fig. 1 is medium volatile organic concentration on-line monitoring system in the air described in the utility model embodiment 1
Schematic diagram, now the first six-way valve V1 be in gas detect state, while the second six-way valve V2 be in loading condition inside
Connection figure；
Wherein, 1- particulate matters and ozone removal device, 2- gas mixer chambers, the gas path pipes of 3- first, 4- first gas streams
Fast controller, the magnetic valves of 5- first, the sampling pumps of 6- first, the magnetic valves of 7- second, 8- second gas flow speed controller, 9- gases hair
Generating apparatus, 10- second gas pipeline, the six-way valves of 11- first, 12- purge gass storage tank, the magnetic valves of 13- the 3rd, the gas of 14- the 3rd
Body pipeline, the adsorption tubes of 15- first, the gas pipings of 16- the 4th, the gas pipings of 17- the 5th, the six-way valves of 18- second, the electricity of 19- the 4th
Magnet valve, 20- gas-detecting devices, the magnetic valves of 21- the 5th, the gas pipings of 22- the 6th, the adsorption tubes of 23- second, the gases of 24- the 7th
Pipeline, 25- third gas flow speed controller, the magnetic valves of 26- the 7th, the sampling pumps of 27- second, the magnetic valves of 28- the 6th, 29- high temperature
Combustion furnace, 30- capnographs, 31- gas purging devices, the magnetic valves of 32- the 8th, the gas flow rate controllers of 33- the 4th,
34- blowbacks scavenging arrangement, the magnetic valves of 35- the 9th, 36- variable heaters, 37- variable heaters, 38- constent temperature heaters.
Fig. 2 is medium volatile organic concentration on-line monitoring system in the air described in the utility model embodiment 1
Schematic diagram, now the first six-way valve V1 is in gas load state, while the second six-way valve V2, which is in gas, detects state
Internal connection figure；
Wherein, 10- second gas pipeline, the six-way valves of 11- first, 12- purge gass storage tank, the magnetic valves of 13- the 3rd, 14-
Third gas pipeline, the adsorption tubes of 15- first, the gas pipings of 16- the 4th, the gas pipings of 17- the 5th, the six-way valves of 18- second, 19-
4th magnetic valve, 20- gas-detecting devices, the magnetic valves of 21- the 5th, the gas pipings of 22- the 6th, the adsorption tubes of 23- second, 24-
Seven gas pipings, 25- third gas flow speed controller, the magnetic valves of 26- the 7th, the sampling pumps of 27- second, the magnetic valves of 28- the 6th,
29- high temperature combustion furnaces, 30- capnographs, 34- blowbacks scavenging arrangement, the magnetic valves of 35- the 9th, 36- variable heaters,
37- variable heaters.
Embodiment
With reference to specific embodiment, the utility model is expanded on further.It should be understood that these embodiments are merely to illustrate this
Utility model rather than limitation scope of the present utility model.Furthermore, it is to be understood that reading in described in the utility model
After appearance, those skilled in the art can make various changes or modifications to the utility model, and these equivalent form of values equally fall within this
Utility model limited range.
A kind of on-line monitoring system for medium volatile organic compound, as shown in figure 1, the on-line monitoring system
Include sampling device, dress sample and sampling apparatus and detection means；
The sampling device includes particulate matter and ozone removal device 1, gas mixer chamber 2, two gas flow rate controllers 4
With the 8, first gas circuit pipeline 3, two magnetic valves 5 and 7, the sampling pumps 6 of gas generating means 9 and first；The particulate matter and ozone
Removal device 1 is connected with gas mixer chamber 2 by the first gas circuit pipeline 3；Described one end of gas mixer chamber 2 connects first gas stream
Fast controller 4, the first gas flow speed controller 4 is connected by the first magnetic valve 5 with the first sampling pump 6；The gas is mixed
The other end for closing room 2 is connected by the second magnetic valve 7 with second gas flow speed controller 8, the second gas flow speed controller 8
It is connected with gas generating means 9；
The dress sample and sampling apparatus include two six-way valves 11 and 18, two adsorption tubes 15 and 23, purge gass holding vessels
12nd, third gas flow speed controller 25, the second sampling pump 27, connecting pipe road and five magnetic valves；
The first entrance A1 phases that gas mixer chamber 2 in sampling device passes through second gas pipeline 10 and the first six-way valve 11
Even；Purge gass holding vessel 12 is connected by the 3rd magnetic valve 13 with the second entrance B1 of first six-way valve 11；Described first
The first outlet E1 of six-way valve 11 is connected by third gas pipeline 14 with the first adsorption tube 15；First adsorption tube 15 passes through the 4th
Gas piping 16 is connected with the 3rd entrance F1 of the first six-way valve 11；3rd outlet C1 of the first six-way valve 11 passes through the 5th gas
Pipeline 17 is connected with the first entrance A2 of the second six-way valve 18；The second outlet D1 of first six-way valve 11 passes through the 4th magnetic valve 19
It is connected respectively with the gas-detecting device 20 and high temperature combustion furnace 29 in detection means；
Purge gass holding vessel 12 is connected by the 5th magnetic valve 21 with the second entrance B2 of second six-way valve 18；It is described
The first outlet E2 of second six-way valve 18 is connected by the 6th gas piping 22 with the second adsorption tube 23；Second adsorption tube 23 passes through
7th gas piping 24 is connected with the 3rd entrance F2 of the second six-way valve 18；3rd outlet C2 of the second six-way valve 18 passes through the 3rd
Gas flow rate controller 25 is connected with the 7th magnetic valve 26；The other end of 7th magnetic valve 26 connects the second sampling pump 27；Second
The second outlet D2 of six-way valve 18 is fired with the gas-detecting device 20 in detection means and high temperature respectively by the 6th magnetic valve 28
Stove 29 is burnt to be connected；
The detection means includes capnograph 30, high temperature combustion furnace 29 and gas-detecting device 20；The height
Warm combustion furnace 29 is connected with capnograph 30；
The on-line monitoring system also includes blow device, and the blow device includes gas and purges circuit and blowback scavenging
Circuit, the gas purging circuit is that gas purging device 31 passes through the 8th magnetic valve 32 and the phase of the 4th gas flow rate controller 33
Even, the 4th gas flow rate controller 33 is connected in first gas pipeline 3；The blowback scavenging circuit is blowback sweeping device
34 are connected with the gas-detecting device 20 and high temperature combustion furnace 29 in detection means respectively by the 9th magnetic valve 35.Wherein, institute
It is after pipeline uses a period of time, to carry out purging to pipeline with the gas purging device and clean to state purging circuit.Further,
The presence of the gas purging circuit and blowback scavenging circuit is for the pipeline to the pipeline in six-way valve, adsorption tube and correlation
Cleaned and served as carrier gas during detection；
The purge gas can be zero air, or the inert gas such as helium, nitrogen.
The on-line monitoring system also includes the first variable heater 36 and the second variable heater 37；Described first is adjustable
Heater 36 is used to carry out the first six-way valve 11 in dress sample and sampling apparatus, the first adsorption tube 15 and the pipeline communicated therewith
Heating；Second variable heater 37 be used for dress sample and sampling apparatus in the second six-way valve 18, the second adsorption tube 23 and
The pipeline communicated therewith is heated；The temperature of the variable heater can carry out gradient regulation；By adding to adsorption tube difference
The setting of hot temperature, different gaseous organic substances can be stayed in adsorption tube, realize the selective absorbing to gaseous organic substance；
The on-line monitoring system also includes constent temperature heater 38, and the constent temperature heater 38 is used for first gas pipeline
3 and gas mixer chamber 2 heated, the temperature of the constent temperature heater 38 is constant in a certain temperature, and purpose is detected to reduce
The loss of low volatility gas in device, that is, reduce low volatility gas absorption, parsing, the possibility of cohesion.
In initial detecting, gas is pumped into gas mixer chamber 2 by the first sampling pump 6 with constant flow velocity (25L/min), together
When the Plays gas of gas generating means 9 gas mixer chamber 2 is entered with certain smaller flow velocity (5L/min), be detected gas and mark
Gas is mixed in gas mixer chamber 2；Mix after the regular hour, adjust six-way valve so that the first six-way valve 11 is examined in gas
Survey state (V1), the second six-way valve 18 are in gas load state (V2), open the second sampling pump 27, form first and fill line-transect road
With the first sampling circuit；
First dress line-transect road is particulate matter and 3 → gas mixer chamber of ozone removal device 1 → first gas pipeline 2 → the second
The gas piping of 3rd outlet C1 of the six-way valve of the first entrance A1 of the six-way valve of gas piping 10 → the first → first → the 5th 17 →
The adsorption tube 23 of first outlet E2 → second adsorption tube 22 → the second of the six-way valve of the first entrance A2 of second six-way valve → second →
3rd outlet C2 → third gas flow velocity of the six-way valve of the 3rd entrance F2 of the six-way valve of the 6th gas piping 24 → the second → second
The sampling pump 27 of controller 25 → the 7th magnetic valve 26 → the second；
First sampling circuit for purge gass storage tank 12 → six-way valve of the 3rd magnetic valve 13 → the first second entrance B1 →
The gas piping the 16 → the 1st of 14 → the first adsorption tube of first outlet E1 → third gas pipeline the 15 → the 4th of first six-way valve
19 → the detection means of magnetic valve of the second outlet D1 of the six-way valve of 3rd entrance F1 of port valve → first → the 4th；In detection means
Divide two-way, gas detection equipment 20 is connected all the way, another road connects capnograph 30 through high temperature combustion furnace 29；
After after the adsorption saturation of the first adsorption tube 15, switch the state of the first six-way valve 11 and the second six-way valve 18, such as Fig. 2 institutes
Show；So that the first six-way valve 11 is in gas load state (V2), the second six-way valve 18 is in gas detection state (V1), is formed
Second dress line-transect road and the second sampling circuit；
Second dress line-transect road is particulate matter and 3 → gas mixer chamber of ozone removal device 1 → first gas pipeline 2 → the second
First outlet E1 → third gas pipeline 14 of the six-way valve of the first entrance A1 of the six-way valve of gas piping 10 → the first → first →
3rd outlet C1 of the six-way valve of the 3rd entrance F1 of the first adsorption tube 15 → the 4th gas piping 16 → the first six-way valve → first
3rd outlet C2 → third gas stream of the six-way valve of the first entrance A2 of the six-way valve of the → the five gas piping 17 → the second → second
The fast sampling pump 27 of controller 25 → the 7th magnetic valve 26 → the second；
Second sampling circuit for purge gass storage tank 12 → six-way valve of the 5th magnetic valve 21 → the second second entrance B2 →
The gas piping the 24 → the 2nd 6 of 22 → the second adsorption tube of first outlet E2 → the 6th gas piping the 23 → the 7th of second six-way valve
28 → the detection means of magnetic valve of the second outlet D2 of the six-way valve of 3rd entrance F2 of port valve → second → the 6th；In detection means
Divide two-way, gas detection equipment 20 is connected all the way, another road connects capnograph 30 through high temperature combustion furnace 29；
It is described that another road gas circuit can complete detection and the ageing process of adsorption tube during gas circuit is loaded all the way,
The 9th magnetic valve 35 can be opened during aging, and blowback scavenging arrangement 34 and purge gass storage tank 12 can be logical to pipeline, adsorption tube and six
Valve is cleaned, or can carry out the replacement of the adsorption tube on the road；
During whole gas collecting, the first variable heater 36 and the second variable heater 37 are constantly in start shape
State；Gradient regulation is carried out to temperature by variable heater；Pass through the setting to adsorption tube different heating temperature, different gaseous states
Organic matter can be stayed in adsorption tube, realize the selective absorbing to gaseous organic substance；
During whole gas collecting, constent temperature heater 38 is constantly in open state, and it is constant that temperature is maintained at one
Temperature, is lost with the wall for reducing gas.
The presence of the six-way valve 18 of first six-way valve 11 and second is to realize medium volatile organic matter in air
Continuous sampling and detection；Described Fig. 1 and Fig. 2 continuous switching, realize the continuous of medium volatile organic matter in air and adopt
Sample and detection.
More than, embodiment of the present utility model is illustrated.But, the utility model is not limited to above-mentioned implementation
Mode.It is all it is of the present utility model spirit and principle within, any modification, equivalent substitution and improvements done etc. should be included in
Within protection domain of the present utility model.
Claims (11)
1. a kind of on-line monitoring system for medium volatile organic compound, it is characterised in that the on-line monitoring system
Include sampling device, dress sample and sampling apparatus and detection means；
The sampling device includes particulate matter and ozone removal device (1), gas mixer chamber (2), two gas flow rate controllers
(4,8), the first gas circuit pipeline (3), two magnetic valves (5,7), gas generating means (9) and the first sampling pump (6)；
The particulate matter and ozone removal device (1) are connected with gas mixer chamber (2) by the first gas circuit pipeline (3)；The gas
Body mixing chamber (2) one end connection first gas flow speed controller (4), the first gas flow speed controller (4) passes through the first electricity
Magnet valve (5) is connected with the first sampling pump (6)；The other end of the gas mixer chamber (2) passes through the second magnetic valve (7) and the second gas
Rate of flow of fluid controller (8) is connected, and the second gas flow speed controller (8) is connected with gas generating means (9)；
The dress sample and sampling apparatus include two six-way valves (11,18), two adsorption tubes (15,23), purge gass holding vessels
(12), third gas flow speed controller (25), the second sampling pump (27), connecting pipe road and five magnetic valves (13,19,21,
26、28)；
The first entrance that gas mixer chamber (2) in sampling device passes through second gas pipeline (10) and the first six-way valve (11)
(A1) it is connected；Purge gass holding vessel (12) passes through the 3rd magnetic valve (13) and the second entrance (B1) of first six-way valve (11)
It is connected；The first outlet (E1) of first six-way valve (11) passes through third gas pipeline (14) and the first adsorption tube (15) phase
Even；First adsorption tube (15) is connected by the 4th gas piping (16) with the 3rd entrance (F1) of the first six-way valve (11)；First
The 3rd outlet first entrance (A2) phase of (C1) by the 5th gas piping (17) and the second six-way valve (18) of six-way valve (11)
Even；The second outlet (D1) of first six-way valve (11) is detected with the gas in detection means and filled respectively by the 4th magnetic valve (19)
(20) are put with high temperature combustion furnace (29) to be connected；
Purge gass holding vessel (12) is connected by the 5th magnetic valve (21) with the second entrance (B2) of second six-way valve (18)；
The first outlet (E2) of second six-way valve (18) is connected by the 6th gas piping (22) with the second adsorption tube (23)；Second
Adsorption tube (23) is connected by the 7th gas piping (24) with the 3rd entrance (F2) of the second six-way valve (18)；Second six-way valve
(18) the 3rd outlet (C2) is connected by third gas flow speed controller (25) with the 7th magnetic valve (26)；7th magnetic valve
(26) the other end connects the second sampling pump (27)；The second outlet (D2) of second six-way valve (18) passes through the 6th magnetic valve (28)
It is connected respectively with the gas-detecting device (20) and high temperature combustion furnace (29) in detection means；
The detection means includes capnograph (30), high temperature combustion furnace (29) and gas-detecting device (20)；It is described
High temperature combustion furnace (29) is connected with capnograph (30).
2. on-line monitoring system according to claim 1, it is characterised in that the on-line monitoring system also includes purging dress
Put, the blow device includes gas and purges circuit and blowback scavenging circuit, and the gas purging circuit is gas purging device
(31) it is connected by the 8th magnetic valve (32) with the 4th gas flow rate controller (33), the 4th gas flow rate controller (33)
It is connected in first gas pipeline (3)；The blowback scavenging circuit is that blowback sweeping device (34) passes through the 9th magnetic valve (35) point
It is not connected with the gas-detecting device (20) and high temperature combustion furnace (29) in detection means.
3. on-line monitoring system according to claim 1 or 2, it is characterised in that the on-line monitoring system also includes the
One variable heater (36) and the second variable heater (37)；First variable heater (36) is used for dress sample and sampling cartridge
The first six-way valve (11), the first adsorption tube (15) in putting and the pipeline communicated therewith are heated；Described second adjustable heating
Device (37) is used to enter the second six-way valve (18) in dress sample and sampling apparatus, the second adsorption tube (23) and the pipeline communicated therewith
Row heating.
4. on-line monitoring system according to claim 1 or 2, it is characterised in that the on-line monitoring system also includes perseverance
Warm heater (38), the constent temperature heater (38) is used to heat first gas pipeline (3) and gas mixer chamber (2).
5. on-line monitoring system according to claim 1, it is characterised in that the particulate matter and ozone removal device (1)
Using filter membrane removal device, sodium thiosulfate is coated with filter membrane.
6. on-line monitoring system according to claim 1, it is characterised in that the inwall of the gas mixer chamber (2) has
One layer of inert material, the inert material is glass, quartz, polytetrafluoroethylene (PTFE) or stainless steel.
7. on-line monitoring system according to claim 1, it is characterised in that gas flow rate controller (4, the 8,25) choosing
From suspended body flowmeter, mass flowmenter, one kind in metering hole.
8. on-line monitoring system according to claim 1, it is characterised in that first sampling pump (6) is to use barrier film
Pump, piston pump or sliding vane rotary pump；Second sampling pump (27) is to use membrane pump, piston pump or sliding vane rotary pump.
9. on-line monitoring system according to claim 3, it is characterised in that first variable heater (36) is using electricity
Heater or inductive heater are hindered, wherein resistance is using heater strip or heating chip architecture；Second variable heater (37) is adopted
With resistance heater or inductive heater, wherein resistance is using heater strip or heating chip architecture.
10. on-line monitoring system according to claim 4, it is characterised in that the constent temperature heater (38) uses resistance
Heater or inductive heater, wherein resistance are using heater strip or heating chip architecture.
11. on-line monitoring system according to claim 1, it is characterised in that the detection means be to adsorption tube (15,
23) gas of collection and the gas of high temperature combustion furnace (29) output are detected in, wherein, gas-detecting device (20) is to inhaling
The gas collected in attached pipe (15,23) is detected that capnograph (30) is the gas exported to high temperature combustion furnace (29)
Body is detected；The gas-detecting device (20) is capnograph, pyrolysis analyzer, mass spectrograph and/or infrared spectrum
Instrument.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720132801.2U CN206618736U (en) | 2017-02-14 | 2017-02-14 | The on-line monitoring system of medium volatile organic matter in a kind of air |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720132801.2U CN206618736U (en) | 2017-02-14 | 2017-02-14 | The on-line monitoring system of medium volatile organic matter in a kind of air |
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| Publication Number | Publication Date |
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| CN206618736U true CN206618736U (en) | 2017-11-07 |
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ID=60230498
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107064420A (en) * | 2017-02-14 | 2017-08-18 | 中国科学院化学研究所 | The on-line monitoring system and monitoring method of medium volatile organic matter in a kind of air |
| CN108709984A (en) * | 2018-06-28 | 2018-10-26 | 江苏阳光海克医疗器械有限公司 | Expiration formula method for detecting cancer |
| CN109060998A (en) * | 2018-09-12 | 2018-12-21 | 中国科学院电子学研究所 | Portable detector and its detection method |
-
2017
- 2017-02-14 CN CN201720132801.2U patent/CN206618736U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107064420A (en) * | 2017-02-14 | 2017-08-18 | 中国科学院化学研究所 | The on-line monitoring system and monitoring method of medium volatile organic matter in a kind of air |
| CN107064420B (en) * | 2017-02-14 | 2023-11-28 | 中国科学院化学研究所 | Online monitoring system and method for medium-volatile organic compounds in atmosphere |
| CN108709984A (en) * | 2018-06-28 | 2018-10-26 | 江苏阳光海克医疗器械有限公司 | Expiration formula method for detecting cancer |
| CN109060998A (en) * | 2018-09-12 | 2018-12-21 | 中国科学院电子学研究所 | Portable detector and its detection method |
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