CN104297389B - A kind of chromatographic analysis system - Google Patents

A kind of chromatographic analysis system Download PDF

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Publication number
CN104297389B
CN104297389B CN201410570971.XA CN201410570971A CN104297389B CN 104297389 B CN104297389 B CN 104297389B CN 201410570971 A CN201410570971 A CN 201410570971A CN 104297389 B CN104297389 B CN 104297389B
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opening
column
perforate
chromatographic column
way valve
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CN104297389A (en
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陈鉴祥
吴建勋
周健能
冯毅明
李佩贤
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FOSHAN NANHAI DISTRICT ENVIRONMENTAL PROTECTION MONITORING STATION
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FOSHAN NANHAI DISTRICT ENVIRONMENTAL PROTECTION MONITORING STATION
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Abstract

The present invention relates to a kind of chromatographic analysis system, it is provided with gas chromatograph, it is characterized in that: described chromatographic analysis system farther includes sampling device, described sampling device provides sample gas to be detected for described gas chromatograph, and described gas chromatograph includes the first chromatographic column, the second chromatographic column, damping column and fid detector;Described sampling device includes ten-way valve and six-way valve, and described six-way valve may be selected to be state one and state two;During detection, described six-way valve is in state one, carrier gas divides two-way to enter described ten-way valve, two-way is divided to take out of sample gas to be measured, one road flows through the second chromatographic column and damping column is delivered to fid detector and detected, and another road is delivered to fid detector after flowing through six-way valve, the first chromatographic column and damping column successively and detected;During blowback, described six-way valve is in state two, and described carrier gas is by, after described six-way valve, flowing through described first chromatographic column along the opposite direction that flows to state one, described first chromatographic column is carried out blowback.

Description

A kind of chromatographic analysis system
Technical field
The present invention relates to a kind of chromatographic analysis system.
Background technology
At present, detection for NMHC, great majority method described in Chinese Ministry of Environmental Protection standard HJ/T38-1999 is analyzed, owing to the component residence time in the chromatography column of the big polarity of the high boiling point in sample gas is longer, the easily analysis of the next sample gas of interference, and easily pollute chromatographic column, shorten chromatographic column service life.
Summary of the invention
In view of this, it is necessary to provide a kind of single injected sampling can measure two kinds of compositions simultaneously and improve the chromatographic analysis system in chromatographic column service life in fact.
The purpose of the present invention is achieved through the following technical solutions:
A kind of chromatographic analysis system, it is provided with gas chromatograph, it is characterized in that: described chromatographic analysis system farther includes sampling device, described sampling device provides sample gas to be detected for described gas chromatograph, and described gas chromatograph includes the first chromatographic column, the second chromatographic column, damping column and fid detector;Described sampling device includes ten-way valve and six-way valve, and described six-way valve may be selected to be state one and state two;During detection, described six-way valve is in state one, carrier gas divides two-way to enter described ten-way valve, two-way is divided to take out of sample gas to be measured, one road flows through the second chromatographic column and damping column is delivered to fid detector and detected, another road flow through successively six-way valve, in the first direction flow through (shown in Fig. 2 direction of arrow) as described in after the first chromatographic column, damping column, deliver to fid detector and detect;During blowback, described six-way valve is in state two, after described six-way valve is passed through in described carrier gas, and the first chromatographic column as described in flowing through (shown in Fig. 3 direction of arrow) in a second direction, described first chromatographic column is carried out blowback;
Described second direction is opposite to the first direction, when carrier gas is flowed in a second direction, can remove the impurity in described first chromatographic column.
Preferably, when carrying out blowback, the air pressure of described carrier gas is 80kpa.
Preferably, described sampling device farther includes flow controller, and carrier gas is divided into the first branch road and the second branch road by described flow controller, and described first branch road and the second branch road are connected with ten-way valve respectively through pipeline.
Preferably, described ten-way valve is provided with ten openings, respectively the tenth opening, the first opening, the second opening, the 3rd opening, the 4th opening, the 5th opening, the 6th opening, the 7th opening, the 8th opening and the 9th opening, described tenth opening is sample gas import to be measured, and described 9th opening is sample gas to be measured outlet;Described second opening and described 6th opening are carrier gas inlet;Described first opening is connected by pipeline with described 4th opening, and described 5th opening is connected by pipeline with described 8th opening;Described first branch road is connected with described second opening line, and described second branch road is connected with described 6th opening.
Preferably, described sampling device includes the first quantitative loop for quantitatively keeping in sample gas to be detected and the second quantitative loop, and described first quantitative loop is located on the pipeline between the first opening and described 4th opening;Described second quantitative loop is located on the pipeline between described 5th opening and described 8th opening.
Preferably, described six-way valve is provided with six perforates, respectively the first perforates, the second perforate, the 3rd perforate, the 4th perforate, the 5th perforate and the 6th perforate;Described 7th opening is connected with described 6th perforate pipeline, and described first chromatographic column includes first end and relative the second end, and described second chromatographic column includes the first port and the second relative port, and described damping column includes first end and relative the second end;The first end of described first chromatographic column is connected with described first perforate pipeline;The second end of described first chromatographic column is connected with described 3rd perforate pipeline;First port of described second chromatographic column is connected with described 3rd opening conduit;Second port of described second chromatographic column respectively with described second perforate, described 4th perforate, described damping column the second end pipeline be connected;The first end of described damping column is connected with described fid detector pipeline.
Preferably, described sampling device farther includes molecular sieve filtration pipe, and described mobile phase filters laggard inbound traffics controller through molecular sieve filtration pipe.
Preferably, the state switching of described six-way valve is switched over by manually or automatically mode.
Preferably, described first chromatographic column is polarity capillary column, and described polarity capillary column is aluminium sesquioxide capillary column or molecular sieve capillary column;Described second chromatographic column and described damping column are hollow capillary column.
A kind of chromatographic analysis system, it is provided with gas chromatograph, it is characterized in that: described chromatographic analysis system farther includes sampling device, described sampling device provides sample gas to be detected for described gas chromatograph, and described gas chromatograph includes the first chromatographic column, the second chromatographic column, damping column and fid detector;
Described sampling device includes flow controller, ten-way valve, six-way valve, the first quantitative loop and the second quantitative loop;
Carrier gas is divided into the first branch road and the second branch road by described flow controller, and the sample gas in the first quantitative loop and the second quantitative loop is taken out of by the carrier gas of described first branch road and the second branch road respectively;
Described ten-way valve is provided with ten openings, respectively the tenth opening, the first opening, the second opening, the 3rd opening, the 4th opening, the 5th opening, the 6th opening, the 7th opening, the 8th opening and the 9th opening, described tenth opening is sample gas import to be measured, described 9th opening is sample gas to be measured outlet, and described second opening and described 6th opening are carrier gas inlet;Described first opening is connected by pipeline with described 4th opening, and described first quantitative loop is series on the pipeline between the first opening and described 4th opening;Described 5th opening is connected by pipeline with described 8th opening, and described second quantitative loop is series on the pipeline between described 5th opening and described 8th opening;Described first branch road and the second opening connect, and described second branch road and the 6th opening connect;
Described six-way valve is provided with six perforates, respectively the first perforates, the second perforate, the 3rd perforate, the 4th perforate, the 5th perforate and the 6th perforate, and described 7th opening is connected with described 6th perforate pipeline;
Described first chromatographic column includes first end and relative the second end, and described second chromatographic column includes the first port and the second relative port, and described damping column includes first end and relative the second end;The first end of described first chromatographic column is connected with described first perforate pipeline;The second end of described first chromatographic column is connected with described 3rd perforate pipeline;First port of described second chromatographic column is connected with described 3rd opening conduit;Second port of described second chromatographic column respectively with described second perforate, described 4th perforate, described damping column the second end pipeline be connected;The first end of described damping column is connected with described fid detector pipeline;During detection, the carrier gas of described first branch road flows through the first opening, the first quantitative loop after entering described ten-way valve the second opening successively, after 4th opening, the 3rd opening, the second chromatographic column and damping column, deliver to fid detector to detect, the carrier gas of described second branch road flows through the 5th opening, the second quantitative loop, the 8th opening, the 7th opening, the 6th perforate of described six-way valve, the first perforate after entering the 6th opening successively, flow through described first chromatographic column, the 3rd perforate, the 4th perforate and damping column in the first direction after deliver to fid detector and detect;During blowback, described carrier gas is by, after described six-way valve, flowing through described first chromatographic column in a second direction, described first chromatographic column is carried out blowback;Described second direction is opposite to the first direction, when carrier gas is flowed in a second direction, can remove the impurity in described first chromatographic column.
Preferably, described sampling device farther includes molecular sieve filtration pipe, and described carrier gas filters laggard inbound traffics controller through molecular sieve filtration pipe.
Compared with prior art, chromatographic analysis system of the present invention has the advantages that
(1) present invention capillary column replaces traditional packed column, analyzes load volume required during sample gas less, and chromatogram peak out is sharper, does not have conditions of streaking, not only saves the consumption of carrier gas, also improves the degree of accuracy that sample gas separates.
(2) chromatographic analysis system of the present invention is provided with six-way valve, this six-way valve can flow through the direction of chromatographic column by changing carrier gas, thus realizing the blowing function to chromatographic column, significantly reduce the pollution of chromatographic column, decrease the interference that next sample gas is measured by a sample gas residual, when particularly separating the component of the big polarity of high boiling point, effect is especially apparent, this improves the degree of accuracy of sample gas detection, extend the life-span of chromatographic column.
(3) additionally, present invention further introduces ten-way valve, thus realize measuring two kinds of different materials of same sample gas simultaneously, work efficiency is substantially increased.
Accompanying drawing explanation
Fig. 1 is the structural representation of the quantitative state of chromatographic analysis system sample gas of present pre-ferred embodiments.
Fig. 2 is the structural representation of the chromatographic analysis system detection state of present pre-ferred embodiments.
Fig. 3 is the structural representation of the chromatographic analysis system blowback state of present pre-ferred embodiments.
Fig. 4 is the structural representation of the chromatographic analysis system sample gas detection state of another embodiment of the present invention.
Fig. 5 is the structural representation of the chromatographic analysis system blowback state of another embodiment of the present invention.
Here each component names corresponding to accompanying drawing labelling is listed:
400 chromatographic analysis system 10 flow controllers
100 sampling device 11 first branch roads
13 second branch road 515 the 5th perforates
30 ten-way valve 516 the 6th perforates
311 first opening 60 second quantitative loop
312 second opening 70 molecular sieve filtration pipes
313 the 3rd opening 90 ecp assemblies
314 the 4th opening 901 entrances
315 the 5th opening 200 gas chromatograpies
316 the 6th opening 210 first chromatographic columns
317 the 7th opening 211 first ends
318 the 8th opening 213 the second ends
319 the 9th opening 230 second chromatographic columns
310 the tenth opening 231 first ports
40 first quantitative loop 233 second ports
50 six-way valve 250 damping columns
511 first perforate 251 first ends
512 second perforate 253 the second ends
513 the 3rd perforate 270 fid detectors
514 the 4th perforate 290 injection ports
Detailed description of the invention
The chromatographic analysis system of the present invention is example for detected gas, in the preferred embodiment, is illustrated for the NMHC that it is applied to measure in air and waste gas.
Chromatographic analysis system 400 such as Fig. 1 present pre-ferred embodiments includes sampling device 100 and gas chromatograph 200, and described sampling device 100 provides gas to be detected or carrier gas for gas chromatograph 200.Described gas chromatograph 200 includes first chromatographic column the 210, second chromatographic column 230, damping column 250 and flame ionization ditector (FlameIonizationDetector, fid detector) 270.Described sampling device 100 includes flow controller 10, ten-way valve 30 and six-way valve 50.During detection, the carrier gas flowing through described flow controller 10 forms tow channel gas stream respectively after ten-way valve 30, and a road air-flow is delivered to FID detector 270 after sample gas to be measured is blown into the second chromatographic column 230 and damping column 250 and detected;Another road air-flow is delivered to FID detector 270 after damping column 250 after sample gas to be measured is blown into six-way valve 50 and the first chromatographic column 210 and is detected, it is achieved thereby that detect while two kinds of components in same sample gas.
Described ten-way valve 30 is for carrying out sample introduction to described first chromatographic column 210 and described second chromatographic column 230 simultaneously, thus realize the two kinds of different components detecting in sample gas in single injected sampling simultaneously, for instance the content of detection Determination of Total Hydrocarbon In Atomsphere and methane.Described six-way valve 50 is used for controlling gas flow direction, realize that sample gas is delivered to described first chromatographic column 210 from forward and be easily separated detection, carrier gas is reversely sent into described first chromatographic column 210, described first chromatographic column 210 is carried out blowback, to remove the sample gas of residual in chromatographic column.
Described six-way valve 50 is for controlling the direction of the first chromatographic column 210 described in airflow passes, and forward flows through and carries out sample gas separation;Flow counterflow through and described first chromatographic column 210 is carried out blowback.The present invention realizes the sample gas of the removing residual of the blowback to polarity chromatographic column by increasing six-way valve 50, improves the degree of accuracy of sample gas detection, extends the life-span of polarity chromatographic column.
Described flow controller 10 includes the first branch road 11 and the second branch road 13, and in the preferred embodiment, described first branch road 11 is identical with the air pressure of the second branch road 13.Preferably, the pressure of the first branch road 11 and the second branch road 13 is 80kpa.
Described ten-way valve 30 is provided with ten openings, respectively the tenth opening the 310, first opening the 311, second opening the 312, the 3rd opening the 313, the 4th opening the 314, the 5th opening the 315, the 6th opening the 316, the 7th opening the 317, the 8th opening 318 and the 9th opening 319.Described tenth opening 310 is sample gas import, and described 9th opening 319 exports for sample gas.Described second opening 312 and described 6th opening 316 are carrier gas inlet.Described first opening 311 is connected by pipeline (figure does not mark) with described 4th opening 314, and the pipeline between described first opening 311 and described 4th opening 314 is provided with the first quantitative loop 40;Described 5th opening 315 is connected by pipeline with described 8th opening 318, and the pipeline between described 5th opening 315 and described 8th opening 318 is provided with the second quantitative loop 60.Described first quantitative loop 40 and described second quantitative loop 60 are for quantitatively temporary sample gas to be measured.
Described ten-way valve 30 has the first state (as shown in Figure 1) and the second state (as shown in Figure 2), can switch between described first state and described second state.Described switching both can manually control, it is also possible to is realized by electric controlled pneumatic control.When described ten-way valve 30 is in described first state, sample gas injects from described tenth opening 310, flow through described first opening 311, described first quantitative loop 40, described 4th opening 314, described 5th opening 315, described second quantitative loop 60, described 8th opening 318 successively, finally flowed out by described 9th opening 319, this be sample gas quantitative time air flow direction process, airflow direction is such as shown in Fig. 1 direction of arrow.
As in figure 2 it is shown, when described ten-way valve 30 is in described second state, carrier gas flows into from described flow controller 10, form two-way gas.One road gas enters described second opening 312 from described first branch road 11, through described first opening 311, the sample gas in described first quantitative loop 40 is taken out of, after flowing through described 4th opening 314, described 3rd opening 313 successively, entering described second chromatographic column 230 and be easily separated, through described damping column 250, finally enter fid detector and carry out detection by quantitative.Another road gas enters described 6th opening 316 from described second branch road 13, through described 5th opening 315, the sample gas in described second quantitative loop 60 is taken out of, after flowing through described 8th opening 318, described 7th opening 317, described six-way valve 50 successively, entering described first chromatographic column 210 and be easily separated, through described damping column 250, finally enter fid detector and carry out detection by quantitative.
Described six-way valve 50 is provided with six perforates, respectively the first perforate 511, the second perforate 512, the 3rd perforate 513, the 4th perforate 514, the 5th perforate 515 and the 6th perforate 516.Described six-way valve 50 has two states, and respectively state one (as shown in Figure 2) and state two (as shown in Figure 3), can switch between described state one and described state two mutually.Described switching action both can manually control, it is also possible to is realized by electric controlled pneumatic control.
As shown in Figure 2, described six-way valve 50 is in state one, when air-flow flows into described six-way valve 50 from described 7th opening 317, flow through described 6th perforate 516 successively, described first perforate 511, forward enter after described first chromatographic column 210 is easily separated, through described damping column 250, finally enter fid detector and carry out detection by quantitative (i.e. detection process air flow direction).As shown in Figure 3, described six-way valve 50 is in state two, when air-flow flows into described six-way valve 50 from described 7th opening 317, flow through described 6th perforate 516, described 3rd perforate 513, reversely described first chromatographic column 210 of inflow successively, flow through described first perforate 511, described second perforate 512, described damping column 250 more successively, finally enter fid detector and residuals is discharged (i.e. blowback process air flow direction).
Described first chromatographic column 210 includes first end 211 and relative the second end 213.Described second chromatographic column 230 includes the first port 231 and the second relative port 233.Described damping column 250 includes first end 251 and relative the second end 253.In the preferred embodiment, described first chromatographic column 210 is polarity capillary column, and described polarity capillary column is aluminium sesquioxide capillary column or molecular sieve capillary column.Described second chromatographic column 230 and described damping column 250 are hollow capillary column.For using packed column, when described first chromatographic column 210 and described second chromatographic column 230 are capillary column, carrier gas consumption required during detection is less, and chromatogram peak out is sharper, it is to avoid conditions of streaking, improves the degree of accuracy that sample gas separates.When described six-way valve 50 carries out state switching, the fluid flow in pipeline can be undergone mutation, and fluid flow caused when described damping column 250 is for cushioning the switching of described six-way valve 50 state suddenlys change, it is prevented that described fid detector 270 stops working.Described fid detector 270 is for carrying out quantitative analysis to the outflow component after separating.
Described first branch road 11 is connected with described second opening 312 pipeline, and described second branch road 13 is connected with described 6th opening 316 pipeline.Described 7th opening 317 is connected with described 6th perforate 516 pipeline.The first end 211 of described first chromatographic column 210 is connected with described first perforate 511 pipeline.The second end 213 of described first chromatographic column 210 is connected with described 3rd perforate 513 pipeline.First port 231 of described second chromatographic column 230 is connected with described 3rd opening 313 pipeline.Second port 233 of described second chromatographic column 230 respectively with described second perforate 512, described 4th perforate 514, described damping column 250 the second end 253 pipeline be connected.The first end 251 of described damping column 250 is connected with described fid detector 270 pipeline.
In the preferred embodiment, described sampling device 100 is further provided with molecular sieve filtration pipe 70, and carrier gas is delivered to flow controller 10 pipeline after the purification of molecular sieve filtration pipe 70 and connects.
In the preferred embodiment, described sampling device 100 is further provided with ecp assembly 90.Described ecp assembly 90 is provided with carrier gas inlet 901, and switchs (not shown go out) pipeline with the switching of described six-way valve 50 and be connected.When needing the state switching described six-way valve 50, starting carrier gas, described six-way valve 50 just promotes described six-way valve 50 to switch between described state one and state two under the air pressure of carrier gas.
Sample gas dosing process: as shown in Figure 1, described ten-way valve 30 is in described first state, sample gas injects from described tenth opening 310, flow through described first opening 311, described first quantitative loop 40, described 4th opening 314, described 5th opening 315, described second quantitative loop 60, described 8th opening 318 successively, finally flowed out by described 9th opening 319, this be sample gas quantitative time air flow direction process, airflow direction is such as shown in Fig. 1 direction of arrow.When full described first quantitative loop 40 and described second quantitative loop 60, stop sample introduction, complete dosing process.
Detection process: as in figure 2 it is shown, after quantitatively completing, described ten-way valve 30 is adjusted to described second state, described six-way valve 50 is adjusted to described state one.Carrier gas, for instance nitrogen, after described molecular sieve filtration pipe 70 purifies, through described flow controller 10, forms two-way gas.One road gas enters described second opening 312 from described first branch road 11, through described first opening 311, the sample gas in described first quantitative loop 40 is taken out of, after flowing through described 4th opening 314, described 3rd opening 313 successively, entering described second chromatographic column 230 and be easily separated, through described damping column 250, finally enter fid detector and carry out detection by quantitative.Another road gas enters described 6th opening 316 from described second branch road 13, through described 5th opening 315, the sample gas in described second quantitative loop 60 is taken out of, flow through described 8th opening 318, described 7th opening 317, described 6th perforate 516, described first perforate 511 successively, enter after (forward entrance) described first chromatographic column 210 is easily separated from the first end 211 of described first chromatographic column 210, through described damping column 250, finally enter fid detector and carry out detection by quantitative.
Blowback process: as it is shown on figure 3, described ten-way valve 30 is still in described second state, described six-way valve 50 is adjusted to state 2.Carrier gas, for instance nitrogen, after described molecular sieve filtration pipe 70 purifies, through described flow controller 10, forms two-way gas.One road gas enters described second opening 312 from described first branch road 11, through described first opening 311, the sample gas in described first quantitative loop 40 is taken out of, after flowing through described 4th opening 314, described 3rd opening 313 successively, entering described second chromatographic column 230 and be easily separated, through described damping column 250, finally enter fid detector and carry out detection by quantitative.Another road gas enters described 6th opening 316 from described second branch road 13, through described 5th opening 315, sample gas in described second quantitative loop 60 is taken out of, flow through described 8th opening 318 successively, described 7th opening 317, described 6th perforate 516, described 3rd perforate 513, after entering (being redirected back into) described first chromatographic column 210 from the second end 213 of described first chromatographic column 210, flow through described first perforate 511 successively, described second perforate 512, described damping column 250, finally enter fid detector to be discharged by the impurity remained in described first chromatographic column 210..
As shown in Figure 4, in another embodiment of the invention, described chromatographic analysis system 400 includes six-way valve 50 and gas chromatograph 200.
Described six-way valve 50 includes six perforates, respectively the first perforate 511, the second perforate 512, the 3rd perforate 513, the 4th perforate 514, the 5th perforate 515 and the 6th perforate 516.Described six-way valve 50 has two states, and respectively state one (as shown in Figure 4) and state two (as shown in Figure 5), can switch between described state one and described state two mutually.Described switching action both can manually control, it is also possible to is realized by electric controlled pneumatic control.
Described gas chromatograph 200 includes the first chromatographic column 210, damping column 250, fid detector 270 and injection port 290.Described first chromatographic column 210 includes first end 211 and relative the second end 213.Described damping column 250 includes first end 251 and relative the second end 253.In the preferred embodiment, described first chromatographic column 210 is polarity capillary column, and described polarity capillary column is aluminium sesquioxide capillary column or molecular sieve capillary column.Described damping column 250 is hollow capillary column.
Described injection port 290 is connected with described 6th perforate 516 pipeline.The first end 211 of described first chromatographic column 210 is connected with described first perforate 511 pipeline;The second end 213 of described first chromatographic column 210 is connected with described 3rd perforate 513 pipeline.The first end 251 of described damping column 250 is connected with described fid detector pipeline;The second end 253 of described damping column 250 is connected with described second perforate 512, described 4th perforate 514 pipeline respectively.
In the preferred embodiment, described chromatographic analysis system 400 is further provided with molecular sieve filtration pipe 70, and carrier gas enters described six-way valve from described injection port after the purification of molecular sieve filtration pipe 70.
In the preferred embodiment, described chromatographic analysis system 400 is further provided with ecp assembly 90.Described ecp assembly 90 is provided with carrier gas inlet 901, and switchs (not shown go out) pipeline with the switching of described six-way valve 50 and be connected.When needing the state switching described six-way valve 50, starting carrier gas, described six-way valve 50 just promotes described six-way valve 50 to switch between described state one and state two under the air pressure of carrier gas.
Detection process: as shown in Figure 4, described six-way valve 50 is in described state one.Sample gas enters from described injection port 290, successively through described 6th perforate 516, described first perforate 511, enter after (forward entrance) described first chromatographic column 210 is easily separated from the first end 211 of described first chromatographic column 210, through described damping column 250, finally enter fid detector and carry out detection by quantitative.
Blowback process: as it is shown in figure 5, described six-way valve 50 is in described state two.Carrier gas, such as nitrogen, after described molecular sieve filtration pipe 70 purifies, flow through described injection port 290 successively, described 6th perforate 516, described 3rd perforate 513, the second end 213 from described first chromatographic column 210 enter (being redirected back into) described first chromatographic column 210 after, flow through described first perforate 511, described second perforate 512, described damping column 250 successively, finally enter the impurity that fid detector will remain in described first chromatographic column 210 and discharge.
The invention is not limited in above-mentioned embodiment, if to the various changes of the present invention or deformation without departing from the spirit and scope of the present invention, if these are changed and deform within the claim or the equivalent technologies scope that belong to the present invention, then the present invention is also intended to comprise these changes and deformation.

Claims (7)

1. a chromatographic analysis system, it is provided with gas chromatograph, it is characterized in that: described chromatographic analysis system farther includes sampling device, described sampling device provides sample gas to be detected for described gas chromatograph, and described gas chromatograph includes the first chromatographic column, the second chromatographic column, damping column and fid detector;Described sampling device includes ten-way valve and six-way valve, and described six-way valve may be selected to be state one and state two;
Described sampling device farther includes flow controller, and carrier gas is divided into the first branch road and the second branch road by described flow controller, and described first branch road and the second branch road are connected with ten-way valve respectively through pipeline;
Described sampling device includes the first quantitative loop for quantitatively keeping in sample gas to be detected and the second quantitative loop, and described first quantitative loop is located on the pipeline between the first opening and described 4th opening;Described second quantitative loop is located on the pipeline between described 5th opening and described 8th opening;
Described ten-way valve is provided with ten openings, respectively the tenth opening, the first opening, the second opening, the 3rd opening, the 4th opening, the 5th opening, the 6th opening, the 7th opening, the 8th opening and the 9th opening, described tenth opening is sample gas import to be measured, and described 9th opening is sample gas to be measured outlet;Described second opening and described 6th opening are carrier gas inlet;Described first opening is connected by pipeline with described 4th opening, and described 5th opening is connected by pipeline with described 8th opening;Described first branch road is connected with described second opening line, and described second branch road is connected with described 6th opening;
During detection, described six-way valve is in state one, carrier gas divides two-way to enter described ten-way valve, two-way is divided to take out of sample gas to be measured, one road gas enters described second opening from described first branch road, through described first opening, the gas in described first quantitative loop is taken out of, flow through described 4th opening successively, 3rd opening, enter described second chromatographic column and damping column is delivered to fid detector and detected, another road enters described 6th opening from described second branch road, through described 5th opening, the sample gas in described second quantitative loop is taken out of, flow through described 8th opening successively, described 7th opening, six-way valve, flow through described first chromatographic column in the first direction, after damping column, deliver to fid detector to detect;
During blowback, described six-way valve is in state two, carrier gas forms two-way gas through described flow controller, one road gas enters described second opening from described first branch road, is taken out of by the sample gas described first quantitative loop through described first opening, through described 4th opening, described 3rd opening, enters described second chromatography post, damping column entrance fid detector;Another gas enters described 6th opening from described second branch road, through described 5th opening, the sample gas in described second quantitative loop is taken out of, flow through described 8th opening, the 7th opening, described 6th opening and six-way valve successively, described carrier gas is by after described six-way valve, flow through described first chromatographic column in a second direction, described first chromatographic column is carried out blowback;Described second direction is opposite to the first direction, when carrier gas is flowed in a second direction, can remove the impurity in described first chromatographic column;Described carrier gas, after described first chromatographic column, enters fid detector through described damping column.
2. chromatographic analysis system according to claim 1, it is characterised in that described six-way valve is provided with six perforates, respectively the first perforates, the second perforate, the 3rd perforate, the 4th perforate, the 5th perforate and the 6th perforate;Described 7th opening is connected with described 6th perforate pipeline, and described first chromatographic column includes first end and relative the second end, and described second chromatographic column includes the first port and the second relative port, and described damping column includes first end and relative the second end;The first end of described first chromatographic column is connected with described first perforate pipeline;The second end of described first chromatographic column is connected with described 3rd perforate pipeline;First port of described second chromatographic column is connected with described 3rd opening conduit;Second port of described second chromatographic column respectively with described second perforate, described 4th perforate, described damping column the second end pipeline be connected;The first end of described damping column is connected with described fid detector pipeline.
3. the chromatographic analysis system according to claim 1-2 any one, it is characterised in that described sampling device farther includes molecular sieve filtration pipe, described carrier gas filters laggard inbound traffics controller through molecular sieve filtration pipe.
4. chromatographic analysis system according to claim 3, it is characterised in that the state switching of described six-way valve is switched over by manually or automatically mode.
5. chromatographic analysis system according to claim 4, it is characterised in that described first chromatographic column is polarity capillary column, described polarity capillary column is aluminium sesquioxide capillary column or molecular sieve capillary column;Described second chromatographic column and described damping column are hollow capillary column.
6. a chromatographic analysis system, it is provided with gas chromatograph, it is characterized in that: described chromatographic analysis system farther includes sampling device, described sampling device provides sample gas to be detected for described gas chromatograph, and described gas chromatograph includes the first chromatographic column, the second chromatographic column, damping column and fid detector;
Described sampling device includes flow controller, ten-way valve, six-way valve, the first quantitative loop and the second quantitative loop;
Carrier gas is divided into the first branch road and the second branch road by described flow controller, and the sample gas in the first quantitative loop and the second quantitative loop is taken out of by the carrier gas of described first branch road and the second branch road respectively;
Described ten-way valve is provided with ten openings, respectively the tenth opening, the first opening, the second opening, the 3rd opening, the 4th opening, the 5th opening, the 6th opening, the 7th opening, the 8th opening and the 9th opening, described tenth opening is sample gas import to be measured, described 9th opening is sample gas to be measured outlet, and described second opening and described 6th opening are carrier gas inlet;Described first opening is connected by pipeline with described 4th opening, and described first quantitative loop is series on the pipeline between the first opening and described 4th opening;Described 5th opening is connected by pipeline with described 8th opening, and described second quantitative loop is series on the pipeline between described 5th opening and described 8th opening;Described first branch road and the second opening connect, and described second branch road and the 6th opening connect;
Described six-way valve is provided with six perforates, respectively the first perforates, the second perforate, the 3rd perforate, the 4th perforate, the 5th perforate and the 6th perforate, and described 7th opening is connected with described 6th perforate pipeline;
Described first chromatographic column includes first end and relative the second end, and described second chromatographic column includes the first port and the second relative port, and described damping column includes first end and relative the second end;The first end of described first chromatographic column is connected with described first perforate pipeline;The second end of described first chromatographic column is connected with described 3rd perforate pipeline;First port of described second chromatographic column is connected with described 3rd opening conduit;Second port of described second chromatographic column respectively with described second perforate, described 4th perforate, described damping column the second end pipeline be connected;The first end of described damping column is connected with described fid detector pipeline;
During detection, the carrier gas of described first branch road flows through the first opening, the first quantitative loop after entering described ten-way valve the second opening successively, after 4th opening, the 3rd opening, the second chromatographic column and damping column, deliver to fid detector to detect, the carrier gas of described second branch road flows through the 5th opening, the second quantitative loop, the 8th opening, the 7th opening, the 6th perforate of described six-way valve, the first perforate after entering the 6th opening successively, flow through described first chromatographic column, the 3rd perforate, the 4th perforate and damping column in the first direction after deliver to fid detector and detect;
During blowback, described carrier gas is by, after described six-way valve, flowing through described first chromatographic column in a second direction, described first chromatographic column is carried out blowback;Described second direction is opposite to the first direction, when carrier gas is flowed in a second direction, can remove the impurity in described first chromatographic column;Described carrier gas, after described first chromatographic column, enters fid detector through described damping column.
7. chromatographic analysis system according to claim 6, it is characterised in that described sampling device farther includes molecular sieve filtration pipe, described carrier gas filters laggard inbound traffics controller through molecular sieve filtration pipe.
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