CN108169401A - A kind of countryside portable gas-detecting device and its operating method - Google Patents
A kind of countryside portable gas-detecting device and its operating method Download PDFInfo
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- CN108169401A CN108169401A CN201810042004.4A CN201810042004A CN108169401A CN 108169401 A CN108169401 A CN 108169401A CN 201810042004 A CN201810042004 A CN 201810042004A CN 108169401 A CN108169401 A CN 108169401A
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- 238000011017 operating method Methods 0.000 title claims abstract description 14
- 239000007789 gas Substances 0.000 claims abstract description 209
- 238000001514 detection method Methods 0.000 claims abstract description 69
- 239000012159 carrier gas Substances 0.000 claims abstract description 61
- 238000005070 sampling Methods 0.000 claims abstract description 41
- 238000000926 separation method Methods 0.000 claims abstract description 36
- 238000012545 processing Methods 0.000 claims abstract description 14
- 238000004868 gas analysis Methods 0.000 claims abstract description 13
- 238000012360 testing method Methods 0.000 claims description 23
- 238000004458 analytical method Methods 0.000 claims description 19
- 229910000831 Steel Inorganic materials 0.000 claims description 17
- 239000010959 steel Substances 0.000 claims description 17
- 239000000203 mixture Substances 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 8
- 238000004587 chromatography analysis Methods 0.000 claims description 6
- 238000002347 injection Methods 0.000 claims description 5
- 239000007924 injection Substances 0.000 claims description 5
- 230000009471 action Effects 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 claims description 3
- 230000009897 systematic effect Effects 0.000 abstract description 9
- 238000010276 construction Methods 0.000 abstract description 6
- 238000004140 cleaning Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 239000004615 ingredient Substances 0.000 description 6
- 230000007246 mechanism Effects 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
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- 238000012986 modification Methods 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
- G01N30/88—Integrated analysis systems specially adapted therefor, not covered by a single one of the groups G01N30/04 - G01N30/86
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
- G01N30/04—Preparation or injection of sample to be analysed
- G01N30/16—Injection
- G01N30/20—Injection using a sampling valve
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
- G01N30/04—Preparation or injection of sample to be analysed
- G01N30/16—Injection
- G01N30/20—Injection using a sampling valve
- G01N2030/201—Injection using a sampling valve multiport valves, i.e. having more than two ports
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
- G01N30/88—Integrated analysis systems specially adapted therefor, not covered by a single one of the groups G01N30/04 - G01N30/86
- G01N2030/8809—Integrated analysis systems specially adapted therefor, not covered by a single one of the groups G01N30/04 - G01N30/86 analysis specially adapted for the sample
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Abstract
The present invention proposes a kind of countryside portable gas-detecting device, and including babinet, babinet is provided with gas sampling unit, and the babinet is internally provided with gas separation unit, detection unit, data acquisition and processing unit, control unit and carrier gas unit；Wherein, the gas separation unit is arranged in an independent separator box, and the separator box is provided with its three internal air inlet pipe of connection and three exhaust pipes.In addition, the operating method the present invention also provides above-mentioned countryside portable gas-detecting device.The countryside portable gas-detecting device of the present invention provides the overall structure being integrated in built in whole in babinet, easy to carry and transport, and the emergent gas analysis suitable for various wild environments detects.The gas separation unit of absolute construction can facilitate to form the highly integrated gas analyzer for facilitating exchange, reduce the quantity of connecting pipe and the quantity of control valve, can effectively reduce systematic error, improve the accuracy of detection and reliability of system.
Description
Technical field
It is especially a kind of available for detection gas ingredient the present invention relates to the gas detection and analysis technology of field of environment protection
Detection device, particularly a kind of countryside portable gas-detecting device and its operating method.
Background technology
Field of environment protection is frequently necessary to be detected analysis to various gases, and what is be typically used for is gas chromatograph.Gas phase color
Spectrometer is the device that mixing sample is carried out to analysis detection, generally includes air-channel system, sampling system, piece-rate system, circuit control
System processed, detecting system, data acquisition and processing system etc..But existing gas chromatograph is generally all mounted on laboratory
Interior, overall volume is very huge, and the complicated airflow line of connection and various power supplies and control line are needed between each system
Cable etc., the connection reliability of whole device is highly unstable, varies slightly, with regard to needing to reexamine calibration, being substantially absent from
The possibility that can be convenient for carrying.
106841483 A of CN disclose a kind of chromatography column feed materials separator, are joined by an eight ways valve and ten-way valve
With to improve analysis efficiency.But two sleeving valves used have been only the time utilization gas circuits of half of half, two sets of gas
The mutual simultaneously onrelevant in road.As a result, the difference of two sets of gas circuits is easy to that systematic error, such as two quantity tubes is brought necessarily to deposit
In volume difference, thus there are unavoidable systematic errors.And more gas path pipes need a large amount of connecting pipe, pipeline
More, the error that gas circuit volume is brought is bigger, and pipeline material is bigger to the Adsorption Effect of ingredient in gas.In addition, pipeline is more,
The time of the easier generation connecting fault of connector, calibration and investigation failure greatly increases, the reliability of system thus can be deteriorated.And
The problem of use of two sleeving valves brings synchronism, the control conversion of system is complicated, the volume that two sleeving valves occupy also bigger, it is difficult to
For portable emergency sampling analysis.
104374860 A of CN disclose a kind of Portable exhaust gas analyzer, and which employs independent ten-way valve cooperations two
A chromatographic column carries out separation post analysis to gas.However the introduction of the general frame of the Portable exhaust gas analyzer of the prior art
It is very simple and crude, it is merely illustrative including babinet, the interior setting automatic sampling sample introduction mechanism of babinet, sample gas separating mechanism and chromatography detection machine
Structure, automatic sampling sample introduction mechanism include ten-way valve, sampling ring, and mixed gas separating mechanism mainly includes rough segmentation chromatographic column, subdivision
The pipeline and heat-preservation cotton of chromatographic column and auxiliary, mixed gas testing agency mainly include fuel cell and the pipeline of auxiliary.As for
Without any explanation, those skilled in the art can not imagine for the conveying of gas, the calibration of equipment, the control of equipment etc.
The overall structure of the Portable exhaust gas analyzer of the prior art.In addition, the prior art is using side associated with two chromatographic columns
Formula carries out the separation of gas, goes deimpurity influence by way of series connection, and two chromatographic columns keep durations series connection during use,
One state sampling plus detergent line, sample introduction is analyzed for a state.But double chromatographic columns of the prior art are to continue series connection to make
With, can only according to the protrusion target zone species of two pillar selectivity, so as to ignore remaining section, but the prior art without
Method removes interfering substance, and the peak type of the different components in minimum gas can not be pulled open to amplification, the peak type of the species of target zone
Subdivision is inadequate, and precision of analysis need to be improved.
Invention content
The technical problem to be solved in the present invention is to provide a kind of countryside portable gas-detecting device and its operating method, with
The problem of being formerly mentioned is reduced or avoided.
Specifically, the present invention provides a kind of countryside portable gas-detecting devices, can effectively reduce system mistake
Difference improves system reliability and accuracy of detection, and can be more practical and portable.
In order to solve the above technical problems, the present invention proposes a kind of countryside portable gas-detecting device, including babinet, institute
State babinet and be provided with gas sampling unit, the babinet be internally provided with gas separation unit, detection unit, data acquisition and
Processing unit, control unit and carrier gas unit；Wherein, the gas separation unit is arranged in an independent separator box,
The separator box is provided with its three internal air inlet pipe of connection and three exhaust pipes；Three air inlet pipe are respectively to connect
The first air inlet pipe and the second air inlet pipe of the carrier gas unit and the third air inlet pipe of the connection gas sampling unit；Institute
It is respectively the downtake pipe and the third of second exhaust pipe and the connection detection unit for being vented to state three exhaust pipes
Exhaust pipe is provided with sampling pump in the second exhaust pipe.
Preferably, data acquisition and processing unit connect the detection unit by circuit, the data acquisition and
Processing unit has the display screen of display testing result and at least one data output interface.
Preferably, the carrier gas unit includes a carrier gas steel cylinder being built in the babinet, the carrier gas steel cylinder point
First via carrier gas and the second road-load gas are not provided by first air inlet pipe and the second air inlet pipe.
Preferably, the gas separation unit includes a ten-way valve being arranged on inside the separator box, and described ten is logical
Valve has the first to the tenth connector according to adjoining position serial number；Wherein, first connector and the 8th connector
It is connected by the pipeline for being provided with the first chromatographic column；Second connector is connected with the third exhaust pipe, the third row
Tracheae is provided with the second chromatographic column between second connector and the detection unit；The third connector and institute
State the connection of the second air inlet pipe；4th connector is connected with the 7th connector by being provided with the pipeline of quantity tube；Described
Five connectors are connected with the second exhaust pipe；6th connector is connected with the third air inlet pipe；9th connection
Mouth is connected with the downtake pipe；Tenth connector is connected with first air inlet pipe.
The present invention also provides a kind of operating methods of above-mentioned countryside portable gas-detecting device, and the method includes such as
Lower step：
The ten-way valve is adjusted to by first state by described control unit, in said first condition, described first
Connector is connected with the tenth connector, and second connector is connected with the third connector, the 4th connector
Connected with the 5th connector, the 6th connector is connected with the 7th connector, the 8th connector with it is described
9th connector connects；
Start the sampling pump, sample gas is acquired by the gas sampling unit, the sample gas is made persistently to lead to
Enter the third air inlet pipe, enter the quantity tube subsequently into the 6th connector and from the 7th connector, from the quantity tube
The gas of outflow is emptied after entering the 4th connector and the 5th connector by the second exhaust pipe；
Meanwhile first air inlet pipe is passed through by the first via carrier gas that described control unit provides the carrier gas unit
The tenth connector and the first connector are continually fed into, then passes through first chromatographic column, from the first chromatographic column stream
The gas gone out is emptied after entering the 8th connector and the 9th connector by the downtake pipe；
Meanwhile second air inlet pipe is passed through by the second road-load gas that described control unit provides the carrier gas unit
The third connector and the second connector are passed through, second chromatographic column is then flowed through by the third exhaust pipe, later
The gas flowed out from second chromatographic column empties after entering the detection unit.
Preferably, the operating method further comprises following steps：
The ten-way valve is adjusted to by the second state from first state by described control unit, in second state
Under, first connector is connected with second connector, and the third connector is connected with the 4th connector, described
5th connector is connected with the 6th connector, and the 7th connector is connected with the 8th connector, and the described 9th connects
Interface is connected with the tenth connector；
At this time by the sampling pump and gas sample injection unit, the sample gas of acquisition is continually fed into the third air inlet
Pipe is emptied subsequently into the 6th connector and the 5th connector and from the second exhaust pipe；
Meanwhile first air inlet pipe is passed through by the first via carrier gas that described control unit provides the carrier gas unit
The tenth connector and the 9th connector are continually fed into, is then emptied by the downtake pipe；
Meanwhile second air inlet pipe is passed through by the second road-load gas that described control unit provides the carrier gas unit
The third connector and the 4th connector are passed through, then blowback, which enters the quantity tube, to be stored in it under the first state
In sample gas release the quantity tube, sample gas flows into the 7th connector and the 8th connector later, blowback into
Enter first chromatographic column, under the action of first chromatographic column, gas with various composition is parsed with friction speed and discharged, and is first solved
The under test gas of precipitation is passed through first connector and the second connector, then flows to described by the third exhaust pipe
Two chromatographic columns are detected after the second chromatography post separation into the detection unit.
Preferably, the operating method further comprises following steps：
After first chromatographic column parses sample gas the time that separation is subscribed, by described control unit by described in
Ten-way valve is adjusted to the third state from the second state, the connection relation of the ten-way valve and first shape under the third state
State is identical, wherein, first connector is connected with the tenth connector, second connector and the third connector
Connection, the 4th connector are connected with the 5th connector, and the 6th connector is connected with the 7th connector, institute
The 8th connector is stated to connect with the 9th connector；
By the sampling pump and the gas sampling unit, the sample gas of acquisition is continually fed into the third air inlet
Pipe enters the quantity tube subsequently into the 6th connector and from the 7th connector, is flowed out from the quantity tube
Gas is emptied after entering the 4th connector and the 5th connector by the second exhaust pipe；With this by second state
Under gas all discharge, in the quantity tube storage for the sample gas analyzed next time；
Meanwhile first air inlet pipe is passed through by the first via carrier gas that described control unit provides the carrier gas unit
The tenth connector and the first connector are continually fed into, then blowback enters first chromatographic column, by first chromatography
Original gas revert all in column is released, and after the 8th connector and the 9th connector, passes through described first
Exhaust pipe empties；
Meanwhile second air inlet pipe is passed through by the second road-load gas that described control unit provides the carrier gas unit
The third connector and the second connector are continually fed into, then flows into the third exhaust pipe, it will be in the third exhaust pipe
Remaining under test gas continue to push second chromatographic column to, the composition under test gas is then made by second chromatographic column
Continue to parse with friction speed and discharge, the gas flowed out later from second chromatographic column enters the detection unit and detects heel row
It is empty；The cycle of a gas analysis is completed under the third state with this；The analysis result that the detection unit obtains is into one
Step is acquired by circuit transmission to the data and processing unit.
The countryside portable gas-detecting device of the present invention provides the overall structure being integrated in built in whole in babinet, respectively
Structure is stably connected in babinet and is integrated, compact-sized, easy to carry and transport, suitable for the emergent gas of various wild environments
Body analysis detection.And the gas separation unit of absolute construction can facilitate to form the highly integrated gas analysis for facilitating exchange
Instrument reduces the quantity of connecting pipe and the quantity of control valve, so as to effectively reduce systematic error, improves system
Reliability and accuracy of detection.In addition, the gas separation unit of the present invention by the first chromatographic column by the miscellaneous peak gas of rear parsing
Body retains blowback, is conducive to the raising of gas accuracy of detection to be checked, between the wave crest for pulling open each composition by the second chromatographic column later
Away from improving the detection degree of different components especially microcomponent, improve accuracy of detection.
Description of the drawings
The following drawings are only intended to schematically illustrate and explain the present invention, not delimit the scope of the invention.Wherein,
The structure that the countryside portable gas-detecting device of a specific embodiment according to the present invention is shown in Fig. 1 is shown
It is intended to；
The connection of the countryside portable gas-detecting device of another specific embodiment according to the present invention is shown in Fig. 2
Structure diagram；
The gas of the countryside portable gas-detecting device of another specific embodiment according to the present invention is shown in Fig. 3
First and third state schematic diagram of separative element；
The second status diagram of gas separation unit shown in Fig. 3 is shown in Fig. 4.
Specific embodiment
For a clearer understanding of the technical characteristics, objects and effects of the present invention, now control illustrates this hair
Bright specific embodiment.Wherein, identical component uses identical label.
Just as described in the background section, due to existing gas analyzing apparatus, such as gas chromatograph etc., structure is multiple
Miscellaneous, connecting pipe and power supply and controlling cable etc. are very more, and the stability for leading to existing gas analyzing apparatus is very poor, inconvenient
In carrying.Therefore, the present invention provides a kind of countryside portable gas-detecting device, by simplifying structure, by necessary structure
It integrates as possible, reduces the quantity of connecting pipe and control valve by reducing the number of components of piece-rate system as possible
Quantity, so as to effectively reduce systematic error, while reliability is improved improve gas analyzer accuracy of detection, with
Obtain a kind of more practical countryside portable gas-detecting device.
Specifically referring to Fig. 1, the countryside portable gas of a specific embodiment according to the present invention is shown
The structure diagram of detection device shows that countryside portable gas-detecting device of the invention includes babinet 100, babinet in figure
100 are provided with gas sampling unit 11, and babinet 100 is internally provided with gas separation unit 12, detection unit 13, data acquisition
And processing unit 14, control unit 15 and carrier gas unit 16 and calibration unit 17；In addition, the pressure condition according to sampling air source
Needs, countryside portable gas-detecting device of the invention built-in in babinet 100 can also control by control unit 15
Sampling pump 18.The binding post or the binding post by external power supply that the outside of babinet 100 may be provided for circumscripted power line
It is replaced with the USB power supply connectors (not shown) convenient for connection vehicle power supply and a kind of alternative feasible program.When
So, in particularly compact portable structure, can also in babinet 100 internal battery as Emergent detection when use.
In addition, in the concrete structure of the present invention, as shown in Fig. 2, it is shown, according to the present invention another is specific
The attachment structure schematic diagram of the countryside portable gas-detecting device of embodiment referring to Fig. 1-2, is additionally provided with each in babinet 100
Kind of the acquisition of connection data and the structures such as processing unit 14, the cable of control unit 15, solenoid valve, it is corresponding also have connection gas into
Sample unit 11, gas separation unit 12, detection unit 13, carrier gas unit 16 and the structures such as gas pipeline for demarcating unit 17.
In addition, the gas separation unit of absolute construction is also built-in in the countryside portable gas-detecting device of the present invention
12, it is arranged in an independent separator box 120, the separator box 120 is provided with three air inlet pipe of its inside of connection
121,122,123 and three exhaust pipes 124,125,126.That is, the gas separation unit 12 being arranged in babinet 100 is designed to
Independent structure, in the outside of separator box 120, only there are six the inside and outside pipelines of connection, are three air inlet pipe 121,122 respectively,
123 and three exhaust pipes 124,125,126, and the gas of the gas for the being internally integrated suitable particular category separation of separator box 120
Be separated column, such as the separation detection for arene compound, may be used such as- 502.2 metal capillary columns and
The combining form of the gas phase splitter of CP-Sil 43CB types；Or the separation detection for halogenated compound, it may be used all
Such asThe combining form of -502.2 metal capillary columns and the gas phase splitter of AE.OV-1301 types.WhereinSystem
Model of the metal capillary column, CP-Sil 43CB, AE.OV-1301 of row for the gas phase splitter of commercially available common type, gas
Analytical performance can be inquired by various products handbook and be obtained.In addition thermostatic control can also be further set in separator box 120
Mechanism avoids indoor temperature fluctuation from interfering analysis result.
A kind of highly integrated gas analysis for facilitating exchange can be formed using the gas separation unit 12 of absolute construction
Instrument, that is, for different types of gas separation detection, it can be with the knockout box 120 of prefabricated plurality of specifications, when needs pair
When the gas of certain classification is analyzed, it is possible to the knockout box 120 of respective classes is packed into babinet 100, only
It needs that corresponding a kind of gas of classification can be formed with six pipelines of the internal pipeline of babinet 100 connection knockout box 120
Body analyzer.In fact, in specific embodiment shown in Fig. 2, six pipelines of knockout box 120 are in fact empty there are two row
Exhaust pipe 124 and 126 be it is in line go out babinet 100 outside, that is, the two pipelines 124 and 126 are integrated in gas
On body separator box 120, any connector can be completely dispensed with when being packed into babinet 100, therefore replace a kind of knockout box
120 need four pipe joints just to complete.
It is corresponding, in the suitable position of babinet 100, the air inlet pipe of gas sampling unit 11 can be set and for three rows
The channel that tracheae 124,125,126 is vented.In addition, according to the concrete condition of sample gas, it, can be in gas for ease of gas analysis
Setting is for the tentatively transition joint 111 of dehumidifying and dedusting in the air inlet pipe of body sample injection unit 11；Certainly, it is dried in air source dustless
Environment can not also use transition joint 111, directly gas is filtered as the dedusting structure built in gas sampling unit 11.
That is, as can be seen that the countryside portable gas-detecting device of the present invention can provide all built-in collect from Fig. 1-2
Into the overall structure in babinet, each structure is stably connected in babinet to be integrated, compact-sized, easy to carry and transport, is fitted
It is detected for the emergent gas analysis of various wild environments.And the gas separation unit of absolute construction can facilitate to form height collection
Into the gas analyzer that can facilitate exchange, reduce the quantity of connecting pipe and the quantity of control valve, so as to effective
Systematic error is reduced, improves the reliability and accuracy of detection of system.
Further, the data acquisition shown in Fig. 1-2 and processing unit 14 pass through circuit connecting detection unit 13, data
Acquisition and processing unit 14 have the display display screen 141 of testing result and at least one data output interface 142.In Fig. 1
The data output interface 142 of three USB forms is particularly shown out, one of data output interface 142 may be set to be
Suitable for installing the card reader form of storage card.Display screen 141 can be the liquid crystal display embedded in a side of babinet 100,
It can also be only a video output interface, external display can be connected by way of video line.Alternatively, at another
In specific embodiment, can also display screen 141 and data output interface 142 be merged by unification according to the situation of technology development
An independent interface, such as USB Type-C interfaces can connect external laptop for connecing by the interface
Detection data and/or vision signal are received, has better scalability.
In addition, as shown in Fig. 2, aforementioned three air inlet pipe 121,122,123 are respectively the first of communication with carrier gas unit 16
121 and second air inlet pipe 122 of air inlet pipe and the third air inlet pipe 123 of connection gas sampling unit 11 and calibration unit 17.
In addition, aforementioned three exhaust pipes 124,125,126 are respectively the downtake pipe 124 and second exhaust for emptying
The third exhaust pipe 126 of pipe 125 and communication with detection unit 13.
Further, carrier gas unit 16 can include a carrier gas steel cylinder 161 being built in babinet 100, carrier gas steel cylinder
161 provide first via carrier gas and the second road-load gas by the first air inlet pipe 121 and the second air inlet pipe 122 respectively.That is, the present embodiment
Pass through built-in carrier gas steel cylinder 161, it is possible to reduce the trouble of joint connection in site gas cylinder reduces systematic error, avoids interim connection
Extra calibration process later, especially suitable for the inspection of gas analysis in emergency circumstances under such as release of toxic gas situation
It surveys.In addition, providing two-way carrier gas by an independent carrier gas steel cylinder 161, the systems such as flow, the ingredient of different air sources mistake is avoided
Difference improves accuracy of detection.Certainly, it is contemplated that it is portable the problem of, the load volume of built-in carrier gas steel cylinder 161 is limited, can also
The interface in parallel with carrier gas steel cylinder 161 is set on babinet 100, external others high pressures when for long-time on-the-spot test
Carrier gas gas cylinder.Since flow velocity and the type selection of carrier gas are affected to result, replacing external carrier gas air source needs
Calibration is re-started, calibration process will be further detailed below.
Further, calibration unit 17 includes a calibration steel cylinder 171 being built in babinet 100 and dynamic calibration instrument
172, third air inlet pipe 123 connects calibration steel cylinder 171 and dynamic calibration instrument 172 by triple valve.Likewise, the present embodiment passes through
Built-in calibration steel cylinder 171, it is possible to reduce the trouble of joint connection in site gas cylinder reduces systematic error.It, can using steel cylinder 171 is demarcated
It is quickly calibrated to perform, that is, by the way that the normal mixture body for demarcating known concentration in steel cylinder 171 is collected in quantity tube 203,
Normal separation detection program is carried out, obtains each component swarming, by quantitative datas such as peak height, peak areas, the mark with laboratory
Directrix curve compares, to determine whether system mode meets formal measurement.
In addition, the dynamic calibration instrument 172 in calibration unit 17 can perform multiple spot dynamic calibration process.That is, dynamic calibration
Instrument 172 is multiple spot calibration instrument, and the mixed gas of different known concentrations is allocated by dynamic calibration instrument 172, and detection obtains analysis
As a result after, corresponding gas with various concentration and quantitative values (peak height or peak area) mapping will obtain multiple points, by these points
It can obtain standard curve.When the general scene of taking out is detected, dynamic calibration instrument 172 can not have to be connected in babinet, and
Calibration steel cylinder 171 can keep being continuously connected with state, that is, be built in babinet.It can also external great Rong if detection time is long
Measure the gas cylinder of standard gas.It can only be fixed concentration to demarcate steel cylinder 171, that is, corresponding dynamic calibration instrument 172 can only be gone to obtain
A point on the standard curve gone out will be seen that the working condition of instrument, so being called according to the deviation of this point and curve
It is quickly calibrated or fast verification can also be called.This quickly calibrated system can test at the scene beginning or it is fast at the end of
Carry out, can also be set daily by program periodically be performed by control system 15 1-2 times it is quickly calibrated.
In a specific embodiment, sampling pump 18 can be set in second exhaust pipe 125, for providing certain stream
Dynamic pressure convenient for the gas sampling in the case of normal pressure, improves the efficiency controllability of sampling analysis.In the present embodiment, it samples
The problems such as pump 18 has been arranged on the terminal position of gas circuit, and the gas circuit connection and material that sampling pump 18 itself may be brought are adsorbed,
Relative to the front end for being set to gas circuit, the influence for accuracy of detection substantially reduces, therefore the present embodiment is preferably by sampling pump
Sampling pump 18 is arranged in second exhaust pipe 125 by 18 postpositions, it is possible to reduce the interference that sampling pump 18 is brought in itself, favorably
In the raising of accuracy of detection.
Referring to the specific of Fig. 3-4 separative elements of countryside portable gas-detecting device further illustrated the present invention
Structure, wherein, the gas of the countryside portable gas-detecting device of another specific embodiment according to the present invention is shown in Fig. 3
First and third state schematic diagram of body separative element；The second state signal of gas separation unit shown in Fig. 3 is shown in Fig. 4
Figure.
It is shown in figure, the separative element of countryside portable gas-detecting device of the invention is arranged on separator box including one
Ten-way valve 20 inside 120, the ten-way valve 20 have the first to the tenth connector according to adjoining position serial number.Due to
The connector for illustrating ten-way valve 20 is too many, and marking specific reference numeral in figure one by one can be very chaotic, in order to become apparent from carrying out
Understand, in Fig. 3 and Fig. 4 of the invention, sequence volume has been carried out according to adjoining position with Arabic numerals by each connector
Number, each Arabic numerals correspond to the connector of the Chinese serial number of similary numerical value, for example, 1 corresponding connector of Arabic numerals,
The first connector is represented in subsequent instruction, and 2 corresponding connector of Arabic numerals represents the second connection in subsequent instruction
Mouthful, and so on.
It is shown in figure, the ten-way valve 20 of the separative element 12 of countryside portable gas-detecting device of the invention, first
Connector is connected with the 8th connector by being provided with the pipeline of the first chromatographic column 201；Second connector and third exhaust pipe 126
Connection, third exhaust pipe 126 are provided with the second chromatographic column 202 between the second connector and detection unit 13；Third connects
Interface is connected with the second air inlet pipe 122；4th connector is connected with the 7th connector by being provided with the pipeline of quantity tube 203；
5th connector is connected with second exhaust pipe 125；6th connector is connected with third air inlet pipe 123；9th connector and first
Exhaust pipe 124 connects；Tenth connector is connected with the first air inlet pipe 121.
The 1-4 operating methods of countryside portable gas-detecting device that the present invention will be described in detail with reference to the accompanying drawings, pass through
The function and work of the connection structure of the separative element 12 of the present invention can be more clearly understood in the process of operating gas analysis
With.
As shown in Figs 1-4, the operating method of countryside portable gas-detecting device of the invention includes the following steps：
Referring first to Fig. 1 and Fig. 3, ten-way valve 20 is adjusted to by first state by control unit 15, i.e., described ten-way valve
There are one first states for 20 tools, and in the first state, the first connector is connected with the tenth connector, and the second connector connects with third
Orifice, the 4th connector are connected with the 5th connector, and the 6th connector is connected with the 7th connector, the 8th connector and
Nine connectors connect.
Then, start sampling pump 18, sample gas is acquired by gas sampling unit 11, sample gas is made to be continually fed into the
Three air inlet pipe 123 subsequently into the 6th connector and enter quantity tube 203 from the 7th connector, the gas flowed out from quantity tube 203
Body is emptied after entering the 4th connector and the 5th connector by second exhaust pipe 125.By the flowing of lasting sample gas,
The sample gas of required reservation amount is stored in quantity tube 203, the analysis of next step is facilitated to detect.
Meanwhile the first air inlet pipe 121 is passed through by the first via carrier gas that control unit 15 provides carrier gas unit 16 and is continued
Be passed through the tenth connector and the first connector, then pass through the first chromatographic column 201, from the first chromatographic column 201 flow out gas into
Enter the 8th connector and the 9th connector, then emptied by downtake pipe 124.
Meanwhile the second air inlet pipe 122 is passed through by the second road-load gas that control unit 15 provides carrier gas unit 16 and is passed through
Third connector and the second connector flow through the second chromatographic column 202 by third exhaust pipe 126, later from the second chromatographic column 202
The gas of outflow empties after entering detection unit 13.
The first chromatographic column 201 and corresponding connector and pipeline are cleaned successively by using first via carrier gas, with
And be vented after being cleaned successively to the second chromatographic column 202 and detection unit 13 using the second road-load gas, same air source can be utilized real
Now to the cleaning of system, air source is stablized, more efficient, is conducive to subsequently obtain more accurate testing result.Until cleaning is steady
After fixed, system reaches the preset state that can analyze detection in next step.
Later, after system reaches scheduled stable state, can by control unit 15 by ten-way valve 20 from Fig. 3 institutes
The first state shown is adjusted to the second state shown in Fig. 4, i.e., there are one the second states for the described tool of ten-way valve 20, shown in Fig. 4
Under second state, the first connector is connected with the second connector, and third connector is connected with the 4th connector, the 5th connector with
6th connector connects, and the 7th connector is connected with the 8th connector, and the 9th connector is connected with the tenth connector.
At this point, by sampling pump 18 and gas sample injection unit 11, the sample gas of acquisition is continually fed into third air inlet pipe
123, it empties subsequently into the 6th connector and the 5th connector and from second exhaust pipe 125.This process is used to keep in pipeline
Sample gas flowing, the sampling convenient for subsequent cycle is not in gas flow interruption, ensures the company of continuous on-line analysis with this
Coherence, avoiding the occurrence of data jump influences accuracy of detection, while ensures that lasting barotropic gas flowing can be to avoid outside air
It is polluted into gas circuit, ensures that gas circuit stablizes cleaning, so as to further ensure the accuracy of analysis result.
Meanwhile the first air inlet pipe 121 is passed through by the first via carrier gas that control unit 15 provides carrier gas unit 16 and is continued
The tenth connector and the 9th connector are passed through, is then emptied by downtake pipe 124.Pipeline is held by carrier gas with this
Continuous cleaning, avoids polluting and prepares gas analysis next time.
Meanwhile the second air inlet pipe 122 is passed through by the second road-load gas that control unit 15 provides carrier gas unit 16 and is passed through
Third connector and the 4th connector, then blowback enter the sample gas that quantity tube 203 will be stored therein under first state
Quantity tube 203 is released, sample gas flows into the 7th connector and the 8th connector later, is equally that blowback enters the first chromatographic column
201, under the action of the first chromatographic column 201, gas with various composition is parsed with friction speed and discharged, and the gas first parsed is passed through
Then first connector and the second connector flow to the second chromatographic column 202, by the second chromatographic column by third exhaust pipe 126
It is detected after 202 separation into detection unit 13.
Second state shown in Fig. 4 is connected to the eye with using the first chromatographic column 201 and the second chromatographic column 202
Separation detection of getting up is similar, and then, operating procedure of the invention is not simple separation, but needs in the first chromatography
After column 201 parses sample gas the time that separation is subscribed, it is switched to the subsequent third state at once.
That is, according to the characteristic of the first chromatographic column 201, the gas first parsed all emptied by the first chromatographic column 201 into
Acquisition can be calculated or test by entering the time of third exhaust pipe 126, when the emptying time for reaching first parsing gas, control
Unit 15 automatically begins to state conversion, that is, ten-way valve 20 is adjusted to the third state from the second state by control unit 15, i.e.,
The ten-way valve 20 tool is there are one the third state, and the connection relation of ten-way valve 20 is identical with first state under the third state, such as Fig. 3
Shown, likewise, the first connector is connected with the tenth connector at this time, the second connector is connected with third connector, and the 4th connects
Interface is connected with the 5th connector, and the 6th connector is connected with the 7th connector, and the 8th connector is connected with the 9th connector.
At this point, the gas first parsed has been fully entered in third exhaust pipe 126, what some was first parsed
Gas may have arrived at the second chromatographic column 202, and even up to (this can be by the second connector and the second color for detection unit 13
The volume of third exhaust pipe 126 between spectrum column 202 is flexibly set, and depending on the width range of target species section).
Control unit 15 is switched to the third state, the gas quilt that 201 back segment of the first chromatographic column parses from the second state immediately later
It blocks suddenly, not further into third exhaust pipe 126.Also that is, in the step of the present invention, from first in sample gas
The gas ingredients first parsed in chromatographic column 201 are needed as under test gas, and from the first chromatographic column 201 after parse
Gas ingredients be useless foreign gas, avoid this portion gas enter the impurity peaks that are generated after detection unit 13 reduce it is to be measured
The curve precision of gas.
It is switched to after the third state, as shown in figure 3, by sampling pump 18 and gas sample injection unit 11, by the sample of acquisition
Product gas is continually fed into third air inlet pipe 123, subsequently into the 6th connector and enters quantity tube 203 from the 7th connector, from
The gas that quantity tube 203 flows out is emptied after entering the 4th connector and the 5th connector by second exhaust pipe 125；With this by
Gas under two-state is all discharged, to store the sample gas for analyzing next time in quantity tube 203.
Meanwhile the first air inlet pipe 121 is passed through by the first via carrier gas that control unit 15 provides carrier gas unit 16 and is continued
The tenth connector and the first connector are passed through, then blowback enters the first chromatographic column 201.In first chromatographic column 201 originally at this time
What is retained is the back segment parsing gas not yet flowed out, this part as waste gas due to slow by speed, so from the
Two-state is retained down when being switched to the third state.At this point, the blowback by first via carrier gas acts on, it is originally just residual
This portion gas in the first chromatographic column 201 is stayed in, can be easy to release first by way of blowback by first via carrier gas
Chromatographic column 201.With continuing into for first via carrier gas, original gas revert all in the first chromatographic column 201 can be pushed away
Go out, after the 8th connector and the 9th connector, emptied by downtake pipe 124.That is, in this step, by cutting
The third state is changed to, can reversely be blown clean the exhaust gas in the first chromatographic column 201 by first via carrier gas, since exhaust gas passes through
The speed of first chromatographic column 201 is originally just very slow, can be faster if positive purging efficiency can be very low, and by reverse blow
The first chromatographic column 201 and relevant pipe interface etc. are cleaned, cleaning efficiency higher, the time needed is shorter, purges cleaning
Effect is also more much better than positive purging effect, also avoid being difficult in positive purging the parsing overlong time species purged away into
Enter the detection unit 13 analyzed next time, so as to more reduce impurity interference, improve the accuracy of analysis result.
Further simultaneously, the second road-load gas for providing carrier gas unit 16 by control unit 15 passes through the second air inlet pipe
121 are continually fed into third connector and the second connector, then flow into third exhaust pipe 126.In third exhaust pipe 126 at this time just
It is the remaining under test gas that the leading portion being just retained down first parses well, is switched to after the third state, just by
Two road-load gas relays flow into third exhaust pipes 126 and push remaining under test gas to second chromatographic column 202, be then exactly normal through
Second chromatographic column 202 makes the composition under test gas continue to parse discharge with friction speed, is flowed out later from the second chromatographic column 202
Gas enter detection unit 13 detect after empty；Complete the cycle of a gas analysis in a third condition with this；Detection is single
The analysis result that member 13 obtains further is acquired by circuit transmission to data and processing unit 14.
Under this step, due to before being retained parsing time longer foreign gas by the first chromatographic column 201, do not have
Into third exhaust pipe 126, therefore really needing for the second chromatographic column 202 is pushed to by the second road-load gas and analyzes detection
The under test gas of different components is parsed discharge, has pulled open gas with various by gas ingredients, the second chromatographic column 202 at different rates
The interval of the curve wave crest of composition avoids adjacent peaks and mutually covers interference, improves different components especially microcomponent
Detection degree, improve accuracy of detection.
In the present invention, there is no directly carry out series connection point by the first chromatographic column 201 and the second chromatographic column 202 for sample gas
Analysis detection, but the first chromatographic column 201 has carried out a retention operation before testing, using the first chromatographic column 201 to sample
Gas carries out a pre-separation, and the under test gas first parsed is oriented to the second chromatographic column, is switched by state by back segment exhaust gas
It is trapped in the first chromatographic column 201, later exhaust gas blowback goes out to prepare and detect next time.Control unit 15 can be according to first
The property settings reasonable time of chromatographic column 201 carries out state conversion, it is possible to except the under test gas desired analysis detection
Back segment exhaust gas retention, only analyze leading portion under test gas.
In conclusion the present invention countryside portable gas-detecting device provide be integrated in built in whole it is whole in babinet
Body structure, each structure is stably connected in babinet to be integrated, compact-sized, easy to carry and transport, suitable for various field rings
The emergent gas analysis detection in border.And the gas separation unit of absolute construction, which can facilitate to be formed, highly integrated facilitates exchange
Gas analyzer reduces the quantity of connecting pipe and the quantity of control valve, so as to effectively reduce systematic error, carries
The high reliability and accuracy of detection of system.In addition, the gas separation unit of the present invention is parsed by the first chromatographic column by after
Miscellaneous peak gas retention blowback, be conducive to the raising of gas accuracy of detection to be checked, each composition pulled open by the second chromatographic column later
Corrugation pitch, improve the detection degree of different components especially microcomponent, improve accuracy of detection.
It will be appreciated by those skilled in the art that although the present invention is described in the way of multiple embodiments,
It is that not each embodiment only includes an independent technical solution.So narration is used for the purpose of for the sake of understanding in specification,
Those skilled in the art should consider the specification as a whole is understood, and by technical solution involved in each embodiment
The mode of different embodiments can be combined with each other into understand protection scope of the present invention by regarding as.
The foregoing is merely the schematical specific embodiments of the present invention, are not limited to the scope of the present invention.It is any
Those skilled in the art, equivalent variations, modification and the combination made under the premise of the design of the present invention and principle is not departed from,
The scope of protection of the invention should all be belonged to.
Claims (7)
1. a kind of countryside portable gas-detecting device, including babinet (100), which is characterized in that the babinet (100) is provided with
Gas sampling unit (11), the babinet (100) are internally provided with gas separation unit (12), detection unit (13), data
Acquisition and processing unit (14), control unit (15) and carrier gas unit (16)；Wherein, gas separation unit (12) setting
In an independent separator box (120), the separator box (120) be provided with connection its internal three air inlet pipe (121,
122,123) and three exhaust pipes (124,125,126)；Three air inlet pipe (121,122,123) are respectively described in connection
The first air inlet pipe (121) and the second air inlet pipe (122) of carrier gas unit (16) and the connection gas sampling unit (11)
Third air inlet pipe (123)；Three exhaust pipes (124,125,126) be respectively for emptying downtake pipe (124) and
Second exhaust pipe (125) and the third exhaust pipe (126) of the connection detection unit (13), the second exhaust pipe (125)
In be provided with sampling pump (18).
2. countryside portable gas-detecting device as described in claim 1, which is characterized in that the data acquisition and processing are single
First (14) connect the detection unit (13) by circuit, and the data acquisition and processing unit (14) have display testing result
Display screen (141) and at least one data output interface (142).
3. countryside portable gas-detecting device as claimed in claim 2, which is characterized in that the carrier gas unit (16) includes
One carrier gas steel cylinder (161) being built in the babinet (100), the carrier gas steel cylinder (161) respectively by described first into
Tracheae (121) and the second air inlet pipe (122) provide first via carrier gas and the second road-load gas.
4. countryside portable gas-detecting device as claimed in claim 3, which is characterized in that the gas separation unit (12)
The internal ten-way valve (20) of the separator box (120) is arranged on including one, the ten-way valve (20) has according to adjoining position
The first of serial number is to the tenth connector；Wherein, first connector and the 8th connector are by being provided with the first chromatography
The pipeline connection of column (201)；Second connector is connected with the third exhaust pipe (126), the third exhaust pipe (126)
The second chromatographic column (202) being provided between second connector and the detection unit (13)；The third connection
Mouth is connected with second air inlet pipe (122)；4th connector and the 7th connector are by being provided with quantity tube (203)
Pipeline connects；5th connector is connected with the second exhaust pipe (125)；6th connector and the third air inlet
Manage (123) connection；9th connector is connected with the downtake pipe (124)；Tenth connector and described first
Air inlet pipe (121) connects.
A kind of 5. operating method of countryside portable gas-detecting device as claimed in claim 4, which is characterized in that the side
Method includes the following steps：
The ten-way valve (20) is adjusted to by first state by described control unit (15), it is in said first condition, described
First connector is connected with the tenth connector, and second connector is connected with the third connector, and the described 4th connects
Interface is connected with the 5th connector, and the 6th connector is connected with the 7th connector, the 8th connector with
The 9th connector connection；
Start the sampling pump (18), sample gas is acquired by the gas sampling unit (11), holds the sample gas
It is continuous to be passed through the third air inlet pipe (123), enter the quantity tube subsequently into the 6th connector and from the 7th connector
(203), pass through the second exhaust after entering the 4th connector and the 5th connector from the gas that the quantity tube (203) flows out
Manage (125) emptying；
Meanwhile by described control unit (15) make the first via carrier gas that the carrier gas unit (16) provides by described first into
Tracheae (121) is continually fed into the tenth connector and the first connector, first chromatographic column (201) is then passed through, from institute
The gas for stating the first chromatographic column (201) outflow enters after the 8th connector and the 9th connector through the downtake pipe
(124) it empties；
Meanwhile by described control unit (15) make the second road-load gas that the carrier gas unit (16) provides by described second into
Tracheae (122) is passed through the third connector and the second connector, then flows through described by the third exhaust pipe (126)
Two chromatographic columns (202), the gas flowed out later from second chromatographic column (202) empty afterwards into the detection unit (13).
6. operating method as claimed in claim 5, further comprises following steps：
The ten-way valve (20) is adjusted to by the second state from first state by described control unit (15), in second shape
Under state, first connector is connected with second connector, and the third connector is connected with the 4th connector, institute
The 5th connector to be stated to connect with the 6th connector, the 7th connector is connected with the 8th connector, and the described 9th
Connector is connected with the tenth connector；
At this time by the sampling pump (18) and gas sample injection unit (11), the sample gas of acquisition is continually fed into the third
Air inlet pipe (123) is emptied subsequently into the 6th connector and the 5th connector and from the second exhaust pipe (125)；
Meanwhile by described control unit (15) make the first via carrier gas that the carrier gas unit (16) provides by described first into
Tracheae (121) is continually fed into the tenth connector and the 9th connector, is then emptied by the downtake pipe (124)；
Meanwhile by described control unit (15) make the second road-load gas that the carrier gas unit (16) provides by described second into
Tracheae (122) is passed through the third connector and the 4th connector, and then blowback enters the quantity tube (203) by described first
The sample gas being stored therein under state releases the quantity tube (203), and sample gas flows into the 7th connector later
With the 8th connector, blowback enters first chromatographic column (201), under the action of first chromatographic column (201), different gas
Body composition is parsed with friction speed and discharged, and the under test gas first parsed is passed through first connector and the second connector, so
Second chromatographic column (202) is flowed to by the third exhaust pipe (126) afterwards, is detached by second chromatographic column (202)
It is detected afterwards into the detection unit (13).
7. operating method as claimed in claim 6, further comprises following steps：
After first chromatographic column (201) parses sample gas the time that separation is subscribed, pass through described control unit (15)
The ten-way valve (20) is adjusted to the third state from the second state, under the third state connection of the ten-way valve (20) close
System it is identical with the first state, wherein, first connector is connected with the tenth connector, second connector and
Third connector connection, the 4th connector are connected with the 5th connector, the 6th connector and described the
Seven connectors connect, and the 8th connector is connected with the 9th connector；
By the sampling pump (18) and the gas sampling unit (11), the sample gas of acquisition is continually fed into the third
Air inlet pipe (123) enters the quantity tube (203), from institute subsequently into the 6th connector and from the 7th connector
The gas for stating quantity tube (203) outflow enters after the 4th connector and the 5th connector through the second exhaust pipe
(125) it empties；Gas under second state is all discharged with this, is used for be stored in the quantity tube (203)
The sample gas analyzed next time；
Meanwhile by described control unit (15) make the first via carrier gas that the carrier gas unit (16) provides by described first into
Tracheae (121) is continually fed into the tenth connector and the first connector, and then blowback enters first chromatographic column (201),
Original gas revert all in first chromatographic column (201) is released, is connected subsequently into the 8th connector and the 9th
After interface, emptied by the downtake pipe (124)；
Meanwhile by described control unit (15) make the second road-load gas that the carrier gas unit (16) provides by described second into
Tracheae (121) is continually fed into the third connector and the second connector, the third exhaust pipe (126) is then flowed into, by institute
It states the remaining under test gas in third exhaust pipe (126) to continue to push second chromatographic column (202) to, then passes through described second
Chromatographic column (202) makes the composition under test gas continue to parse discharge with friction speed, later from second chromatographic column (202)
The gas of outflow empties after entering the detection unit (13) detection；Gas analysis is completed under the third state with this
Cycle；The analysis result that the detection unit (13) obtains further is acquired and handled to the data by circuit transmission single
First (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810042004.4A CN108169401A (en) | 2018-01-17 | 2018-01-17 | A kind of countryside portable gas-detecting device and its operating method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810042004.4A CN108169401A (en) | 2018-01-17 | 2018-01-17 | A kind of countryside portable gas-detecting device and its operating method |
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| Publication Number | Publication Date |
|---|---|
| CN108169401A true CN108169401A (en) | 2018-06-15 |
Family
ID=62515095
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810042004.4A Pending CN108169401A (en) | 2018-01-17 | 2018-01-17 | A kind of countryside portable gas-detecting device and its operating method |
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Cited By (2)
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| CN109407611A (en) * | 2018-12-18 | 2019-03-01 | 广东省计量科学研究院（华南国家计量测试中心） | The online circling measurment intelligence control system of industrial process discharge gas ingredient and method |
| CN114509472A (en) * | 2022-04-19 | 2022-05-17 | 佛山速敏智能仪器科技有限公司 | Gas detection system, detection method and gas detection device in transformer oil |
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