CN206960422U - A kind of benzene in air system thing on-line monitoring gas chromatograph - Google Patents
A kind of benzene in air system thing on-line monitoring gas chromatograph Download PDFInfo
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- CN206960422U CN206960422U CN201720073106.3U CN201720073106U CN206960422U CN 206960422 U CN206960422 U CN 206960422U CN 201720073106 U CN201720073106 U CN 201720073106U CN 206960422 U CN206960422 U CN 206960422U
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Abstract
The utility model discloses a kind of benzene in air system thing on-line monitoring gas chromatograph, including carrier gas source of the gas, hydrogen source gas and air source of the gas, except hydrocarbon cleaning system, resolution system, ten-way valve, chromatographic column, detector and carrier flow control system are adsorbed；The carrier gas source of the gas is sequentially connected first and removes hydrocarbon cleaning system and the carrier gas flux control system, and carrier gas flux control system is connected with the ten-way valve and is sequentially connected the chromatographic column and detector；The hydrogen source gas and air source of the gas remove hydrocarbon cleaning system and the 3rd except hydrocarbon cleaning system connects with the detector by second respectively；The both ends of the absorption resolution system connect with the ten-way valve.The utility model improves the collimation and accuracy of benzene homologues on-line monitoring gas chromatograph Monitoring Data in the prior art.
Description
Technical field
The utility model is a kind of gas chromatograph, more particularly to a kind of benzene in air system thing on-line monitoring gas-chromatography
Instrument.
Background technology
Gas chromatograph is mainly point that mixture is realized using the difference of the boiling point of material, polarity and adsorption property
From, and then realize the device of species analysis.Gas chromatograph is mainly controlled by air-channel system, sampling system, piece-rate system, circuit
System, detecting system, Data collection and precessing system.After carrier gas, which carries sample, enters piece-rate system, sample component is being moved
The repeated multiple times distribution of middle progress or adsorption/desorption are attached, each component is flowed out after separating.When component flows out piece-rate system
Afterwards, detector is immediately entered.Sample component can be changed into electric signal, the telecommunications that data collecting system will be collected into by detector
Number it is converted into the peak height or area of each component, data handling system is by being calculated the content of each component.
Method one kind of currently used gas chromatograph for determination benzene in air system thing be at normal temperatures, it is poly- with being filled with
Benzene homologues in the sampling pipe enriched air of 2,6- diphenyl p-phenylenes (Tenax), sampling pipe is then accessed into thermal desorption instrument, added
Adsorption component is imported in the gas chromatograph with flame ionization ditector after heat and analyzed.Another method is to use
Benzene homologues in activated carbon sampling pipe enriched air, carbon disulfide (CS2) parsing, using with flame ionization ditector
Gas chromatograph for determination is analyzed.Both approaches can not realize the purpose of on-line real time monitoring, and adsorb, parse, analysis
Independently carry out, add the cycle of sample analysis, and in the transport of sampling pipe and storing process if there is operation not
The situation of specification, influence the accuracy of sample.
Utility model content
The utility model solves and is unable to on-line real time monitoring existing for above-mentioned prior art measure benzene in air system thing, divides
The shortcomings that analysing long cycle, accuracy difference.By the way that absorption (sampling), parsing, analysis three are combined together, it is possible to achieve dynamically enter
Sample absorption, Thermal desorption, chromatography are carried out continuously, and realize the function of on-line monitoring, avoid sampling transportation, so as to subtract
Lack analytical cycle, improve the accuracy of sample analysis.
The utility model provides a kind of benzene in air system thing on-line monitoring gas chromatograph, is by following technical scheme
Realize：
A kind of benzene in air system thing on-line monitoring gas chromatograph, including carrier gas source of the gas, hydrogen source gas and air source of the gas, are removed
Hydrocarbon cleaning system, adsorb resolution system, ten-way valve, the first chromatographic column, the second chromatographic column, detector and carrier gas flux control system
System；The carrier gas source of the gas is sequentially connected first and removes hydrocarbon cleaning system and the carrier gas flux control system, carrier gas flux control system
System is connected with the ten-way valve and is sequentially connected first chromatographic column, the second chromatographic column and detector；The hydrogen source gas and
Air source of the gas removes hydrocarbon cleaning system and the 3rd except hydrocarbon cleaning system connects with the detector by second respectively；The absorption solution
The both ends of analysis system connect with the ten-way valve.
The ten-way valve has ten part connectors.
The gas chromatograph has sampling work state, and under sampling work state, the carrier gas is in carrier gas source of the gas
By first except hydrocarbon cleaning system carries out entering carrier gas flux control system after removing hydrocarbon, the first via is circulated to the 7th connection successively
Mouthful, the 6th connector, the second chromatographic column, the second connector, the 3rd connector, finally it is vented port to carrier gas；Second tunnel is successively
It is circulated to the 4th connector, the 5th connector, the first chromatographic column, finally to detector；Sample enters the by sample input
Ten connectors, the first connector is passed sequentially through, adsorb resolution system, the 8th connector, the 9th connector, be finally vented to sample
Port.
The gas chromatograph has sample introduction working condition, and under sample introduction working condition, the carrier gas is in carrier gas source of the gas
By first except hydrocarbon cleaning system carries out entering carrier gas flux control system after removing hydrocarbon, the first via is circulated to the 7th connection successively
Mouthful, the 8th connector, resolution system is adsorbed, the first connector, the second connector, the second chromatographic column, the 6th connector, the 5th connects
Interface, the first chromatographic column, finally to detector；Second tunnel is circulated to the 4th connector, the 3rd connector, finally to carrier gas successively
It is vented port；Sample sequentially enters the tenth connector by sample input, the 9th connector, is finally vented port to sample.
The carrier gas flux control system is electron pressure control system.
The detector is flame ionization detector.
First chromatographic column and the second chromatographic column are filled with carrier.
Equipped with the filler to benzene homologues with adsorbable parsing in the absorption resolution system.
The beneficial effects of the utility model are：The utility model is the gas chromatograph after a kind of improvement, the device collection sample
Product gather, Thermal desorption, chromatography is in one, it is possible to achieve the real-time monitoring of benzene in air system thing, have analytical cycle it is short and
The advantages of accuracy is high.
Brief description of the drawings
Fig. 1 is structural representation of the utility model under sampling work state
Fig. 2 is structural representation of the utility model under sample introduction working condition
Fig. 3 is test result schematic diagram of the present utility model
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail.
It is the structural representation of gas chromatograph of the present utility model such as Fig. 1 and Fig. 2, in sampling and sample introduction work shape
Under state, gas circuit circulation is different, but the structure specifically includes carrier gas source of the gas 11, hydrogen source gas 23 and air source of the gas 24, and three are removed hydrocarbon
Cleaning system, adsorb resolution system 14, ten-way valve V1, the first chromatographic column 17, the second chromatographic column 19, detector 20 and carrier gas flux
Control system 13；Carrier gas source of the gas 11 is sequentially connected first and removes hydrocarbon cleaning system 12 and carrier gas flux control system 13, carrier gas flux
Control system 13 is connected with ten-way valve V1 and is sequentially connected the first chromatographic column 17, the second chromatographic column 19 and detector 20；The hydrogen
Gas source of the gas 23 and air source of the gas 24 are respectively by second except hydrocarbon cleaning system 21 and the 3rd is except hydrocarbon cleaning system 22 and detector 20
Connection；The both ends of absorption resolution system 14 connect with ten-way valve V1.
Wherein, ten-way valve V1 has ten part connectors, according to the difference of the gas chromatograph use state, is available for not
With the different circulation paths of gas circuit under working condition.
It is structural representation of the utility model under sampling work state such as Fig. 1, under sampling work state, carrier gas
Now lead to except hydrocarbon cleaning system 12 carries out entering carrier gas flux control system 13 after removing hydrocarbon by first in carrier gas source of the gas 11
Cross control system to shunt gas circuit, the first via is circulated to the 7th connector 7, the 6th connector 6, the second chromatographic column successively
19, the second connector 2, the 3rd connector 3, finally it is vented port 18 to carrier gas；Second tunnel is circulated to the 4th connector 4 successively,
5th connector 5, the first chromatographic column 17, finally to detector 20；The gas circuit of sample is：Sample enters by sample input 16
Tenth connector 10, passes sequentially through the first connector 1, adsorbs resolution system 14, the 8th connector 8, the 9th connector 9, finally
Port 15 is vented to sample.
It is structural representation of the utility model under sample introduction working condition such as Fig. 2, under sample introduction working condition, carrier gas
Now lead to except hydrocarbon cleaning system 12 carries out entering carrier gas flux control system 13 after removing hydrocarbon by first in carrier gas source of the gas 11
Cross control system to shunt gas circuit, the first via is circulated to the 7th connector 7 successively, the 8th connector 8, adsorbs resolution system
14, the first connector 1, the second connector 2, the second chromatographic column 19, the 6th connector 6, the 5th connector 5, the first chromatographic column 17,
Finally to detector 20；Second tunnel is circulated to the 4th connector 4 successively, the 3rd connector 3, is finally vented port 18 to carrier gas；
The gas circuit of sample is：Sample sequentially enters the tenth connector 10, the 9th connector 9, finally to sample by sample input 16
It is vented port 15.
In addition, carrier gas flux control system 13 is electron pressure control system, detector 20 is flame ionization detector,
First chromatographic column 17 and the second chromatographic column 19 are filled with carrier.Being equipped with absorption resolution system 14 has adsorbable solution to benzene homologues
The filler of analysis, such as Tenax.
The utility model in actual use, as shown in figure 1, by sample by sample input 16, pass through adsorb parse
After system 14, absorption terminate, Thermal desorption is carried out, while by controlling ten-way valve V1 valve element to switch over to such as Fig. 2 sample introduction
State, carrier gas enters in the second chromatographic column 19 with the sample parsed from absorption resolution system carries out pre-separation, wherein benzene
Benzene homologues before ethene are entered in the first chromatographic column 17 and separated, after in styrene, device 20 detects after testing, in benzene
The later heavy constituent of ethene enters before the first chromatographic column 17, controls ten-way valve V1 valve elements to switch over to such as Fig. 1 again and samples
State, carrier gas reverse flow in the chromatography column, the heavy constituent blowback being retained in the second chromatographic column 19 to be vented end through carrier gas
Mouth 18 is vented.So as to complete the detection of benzene homologues, obtain Fig. 3 and as shown in following table one, table two benzene homologues chromatographic peak and content.
Table 1：The chromatographic peak peak area of benzene homologues
Table 2：The chromatographic peak peak height of benzene homologues
The utility model benzene in air system thing, which monitors chromatographic testing result on-line, has good repeatability, and its is qualitative
With quantitative repeatability within 3%.
Above example is merely to illustrate the technical solution of the utility model and unrestricted, have references to preferred embodiment to this
Utility model is described in detail, it will be understood by those within the art that, can be to technical side of the present utility model
Case is modified or equivalent substitution, and without departing from the objective and scope of technical solutions of the utility model, it all should cover in this reality
Among new right.
Claims (8)
- A kind of 1. benzene in air system thing on-line monitoring gas chromatograph, it is characterised in that：Including carrier gas source of the gas (11), hydrogen source gas (23) and air source of the gas (24), except hydrocarbon cleaning system (12,21,22), absorption resolution system (14), ten-way valve (V1), the first color Compose post (17), the second chromatographic column (19), detector (20) and carrier gas flux control system (13)；The carrier gas source of the gas (11) is successively Connection first removes hydrocarbon cleaning system (12) and the carrier gas flux control system (13), carrier gas flux control system (13) with it is described Ten-way valve (V1) connects and is sequentially connected first chromatographic column (17), the second chromatographic column (19) and detector (20)；The hydrogen Gas source of the gas (23) and air source of the gas (24) respectively by second except hydrocarbon cleaning system (21) and the 3rd except hydrocarbon cleaning system (22) and Detector (20) connection；The both ends of the absorption resolution system (14) connect with the ten-way valve (V1).
- 2. benzene in air system as claimed in claim 1 thing on-line monitoring gas chromatograph, it is characterised in that：The ten-way valve (V1) there are ten part connectors.
- 3. benzene in air system as claimed in claim 1 or 2 thing on-line monitoring gas chromatograph, it is characterised in that：The gas phase Chromatograph has sampling work state, and under sampling work state, the carrier gas removes hydrocarbon in carrier gas source of the gas (11) by first Cleaning system (12) carries out entering carrier gas flux control system (13) after removing hydrocarbon, and the first via is circulated to the 7th connector (7) successively, 6th connector (6), the second chromatographic column (19), the second connector (2), the 3rd connector (3), finally it is vented port to carrier gas (18)；Second tunnel is circulated to the 4th connector (4), the 5th connector (5), the first chromatographic column (17), finally to detector successively (20)；Sample enters the tenth connector (10) by sample input (16), passes sequentially through the first connector (1), absorption parsing System (14), the 8th connector (8), the 9th connector (9), finally it is vented port (15) to sample.
- 4. benzene in air system as claimed in claim 1 or 2 thing on-line monitoring gas chromatograph, it is characterised in that：The gas phase Chromatograph has sample introduction working condition, and under sample introduction working condition, the carrier gas removes hydrocarbon in carrier gas source of the gas (11) by first Cleaning system (12) carries out entering carrier gas flux control system (13) after removing hydrocarbon, and the first via is circulated to the 7th connector (7) successively, 8th connector (8), absorption resolution system (14), the first connector (1), the second connector (2), the second chromatographic column (19), the Six connectors (6), the 5th connector (5), the first chromatographic column (17), finally to detector (20)；Second tunnel is circulated to successively Four connectors (4), the 3rd connector (3), finally it is vented port (18) to carrier gas；Sample enters successively by sample input (16) Enter the tenth connector (10), the 9th connector (9), be finally vented port (15) to sample.
- 5. benzene in air system as claimed in claim 1 thing on-line monitoring gas chromatograph, it is characterised in that：The carrier gas flux Control system (13) is electron pressure control system.
- 6. benzene in air system as claimed in claim 1 thing on-line monitoring gas chromatograph, it is characterised in that：The detector (20) it is flame ionization detector.
- 7. benzene in air system as claimed in claim 1 thing on-line monitoring gas chromatograph, it is characterised in that：First chromatogram Post (17) and the second chromatographic column (19) are filled with carrier.
- 8. benzene in air system as claimed in claim 1 thing on-line monitoring gas chromatograph, it is characterised in that：The absorption parsing Equipped with the filler to benzene homologues with adsorbable parsing in system (14).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720073106.3U CN206960422U (en) | 2017-01-19 | 2017-01-19 | A kind of benzene in air system thing on-line monitoring gas chromatograph |
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| CN201720073106.3U CN206960422U (en) | 2017-01-19 | 2017-01-19 | A kind of benzene in air system thing on-line monitoring gas chromatograph |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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- 2017-01-19 CN CN201720073106.3U patent/CN206960422U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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