CN208350726U - Gas chromatographicanalyzer for VOC on-line analysis - Google Patents
Gas chromatographicanalyzer for VOC on-line analysis Download PDFInfo
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- CN208350726U CN208350726U CN201820909635.7U CN201820909635U CN208350726U CN 208350726 U CN208350726 U CN 208350726U CN 201820909635 U CN201820909635 U CN 201820909635U CN 208350726 U CN208350726 U CN 208350726U
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- gas
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- pressure
- clarifier
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- 238000004458 analytical method Methods 0.000 title claims abstract description 11
- 239000007789 gas Substances 0.000 claims abstract description 25
- 239000012159 carrier gas Substances 0.000 claims abstract description 17
- 230000008016 vaporization Effects 0.000 claims abstract description 16
- 238000009835 boiling Methods 0.000 abstract description 5
- 238000001514 detection method Methods 0.000 abstract description 4
- 238000012546 transfer Methods 0.000 abstract description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 12
- 239000001257 hydrogen Substances 0.000 description 8
- 229910052739 hydrogen Inorganic materials 0.000 description 8
- 238000000926 separation method Methods 0.000 description 8
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 7
- 229910052757 nitrogen Inorganic materials 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 230000005526 G1 to G0 transition Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000004817 gas chromatography Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000005070 sampling Methods 0.000 description 3
- 230000035945 sensitivity Effects 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000004587 chromatography analysis Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 238000009834 vaporization Methods 0.000 description 2
- 239000006200 vaporizer Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000003570 air Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000002808 molecular sieve Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000004445 quantitative analysis Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
- 230000003827 upregulation Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
Abstract
The utility model relates to a kind of gas chromatographicanalyzers for VOC on-line analysis, belong to gas chromatographicanalyzer technical field.It includes carrier gas high-pressure cylinder, pressure reducing valve, first pressure gauge, second pressure gauge, clarifier, flow control valve, spinner flowmeter, vaporizing chamber, chromatographic column, detector, recorder；The upper end of carrier gas high-pressure cylinder is provided with pressure reducing valve, the other end of pressure reducing valve connects clarifier, and the other end of clarifier connects flow control valve, the other end of flow control valve connects spinner flowmeter, spinner flowmeter connects vaporizing chamber, and vaporizing chamber is connected with detector, and recorder is connect with detector.This instrument has the characteristics that concentration span is big, operating condition is complicated for organic exhaust gas, and instrument can effectively avoid the attachment of higher boiling VOC using whole high temperature heat tracing sample transfer, high temperature FID detection, and it is more accurate to measure.
Description
Technical field
The utility model relates to a kind of gas chromatographicanalyzers for VOC on-line analysis, belong to gas chromatographicanalyzer
Technical field.
Background technique
Organic exhaust gas has the characteristics that concentration span is big, operating condition is complicated (high temperature, high humidity, multicomponent), and traditional instrument is useless
In gas sample product transmission process, the attachment of higher boiling VOC can be generated, measurement result is caused to have biggish error.
Summary of the invention
The purpose of this utility model is to provide a kind of gas chromatographicanalyzer for VOC on-line analysis, this instrument needles
Have the characteristics that concentration span is big, operating condition is complicated (high temperature, high humidity, multicomponent) to organic exhaust gas, instrument is using whole high temperature companion
Hot sample transfer, high temperature FID detection, can effectively avoid the attachment of higher boiling VOC, and it is more accurate to measure.
The utility model to achieve the goals above, adopts the following technical scheme that
A kind of gas chromatographicanalyzer for VOC on-line analysis, it includes carrier gas high-pressure cylinder, pressure reducing valve, the first pressure
Power table, second pressure gauge, clarifier, flow control valve, spinner flowmeter, vaporizing chamber, chromatographic column, detector, recorder；
The upper end of carrier gas high-pressure cylinder is provided with pressure reducing valve, the other end of pressure reducing valve connects clarifier, clarifier it is another
One end connects flow control valve, and the other end of flow control valve connects spinner flowmeter, and spinner flowmeter connects vaporizing chamber, vaporization
Room is connected with detector, and recorder is connect with detector.
Further, first pressure gauge is set between pressure reducing valve and clarifier.
Further, second pressure gauge is set between spinner flowmeter and vaporizing chamber.
Working principle:
Gas-chromatography (GC) is a kind of isolation technics.The sample to be analyzed in real work is often more in complicated substrate
Component mixture, to the sample containing unknown component it may first have to be isolated, then related component could be carried out further
Analysis.The separation of mixture is the difference of the physicochemical properties based on component, and GC is mainly boiling point, the polarity for utilizing substance
And the difference of adsorption property realizes the separation of mixture.Sample to be analysed vaporizing chamber vaporization after by inert gas (i.e. carrier gas,
Usually N2, He etc.) bring chromatographic column into, contain liquid or solid stationary phase in column, due to the boiling point of each component, polarity in sample
Or absorption property is different, every kind of component tends to form distribution or adsorption equilibrium between mobile phase and stationary phase.But due to
Carrier gas is flowing, and this balance is actually difficult to set up, and also just because of the flowing of carrier gas, is moving sample component
It is middle to carry out repeated multiple times distribution or absorption/desorb, the big component of concentration is as a result distributed in carrier gas first flows out chromatographic column, and
It is flowed out after distributing the big component of concentration in stationary phase.After group distributes chromatographic column, detector is immediately entered, detector can incite somebody to action
The presence or absence of sample component is changed into electric signal, and the size of electric signal is proportional to the amount of tested component or concentration, as general
When these signals amplify and record, it contains whole raw informations of chromatography.
The utility model has the beneficial effects that
1, the utility model meets the Monitoring factors on-line monitoring demand customized.
2, the utility model realizes that VOC sample efficiently separates in organic exhaust gas, realize different component it is accurate calmly
Property quantitative analysis detection.
FID analytical unit whole process heat tracing can effectively reduce sample loss, while without condensation vapor, be applicable to high temperature height
Wet and corrosive operating condition.Using electron pressure flow control technique (EPC, EFC) control carrier gas, air and hydrogen, precision is high,
It is reproducible.Inside capillary column fixed system, do not need to replace.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model.
Specific embodiment
The utility model is described in detail with reference to the accompanying drawing:
A kind of gas chromatographicanalyzer for VOC on-line analysis, it includes carrier gas high-pressure cylinder 1, pressure reducing valve 2, first
Pressure gauge 3, second pressure gauge 7, clarifier 4, flow control valve 5, spinner flowmeter 6, vaporizing chamber 8, chromatographic column 9, detector
10, recorder 11；
The upper end of carrier gas high-pressure cylinder 1 is provided with pressure reducing valve 2, the other end of pressure reducing valve 2 connects clarifier 4, clarifier 4
The other end connect flow control valve 5, the other end of flow control valve 5 connects spinner flowmeter 6, and spinner flowmeter 6 connects vapour
Change room 8, vaporizing chamber 8 is connected with detector 10, and recorder 11 is connect with detector 10.
First pressure gauge 3 is set between pressure reducing valve 2 and clarifier 4.
Second pressure gauge 7 is set between spinner flowmeter 6 and vaporizing chamber 8.
Air-channel system: air-channel system has the characteristics that carrier gas is allowed to be carried out continuously, pipeline sealing.By the system, can obtain
Obtain pure, flow speed stability carrier gas.The purification of carrier gas need to be unloaded by the clarifier equipped with active carbon or molecular sieve with removing
The unfavorable impurity such as water, oxygen in gas.The adjusting of flow velocity and stabilization are after being used in series by pressure reducing valve, pressure maintaining valve and needle valve
Reach.
Sampling system: sampling system includes sample injector and vaporizer two parts.The effect of sampling system be by liquor sample,
The transient evaporation before entering chromatographic column, is then rapidly and quantitatively transferred in chromatographic column.
Separation system: separation system is made of chromatographic column.There are two main classes for chromatographic column: packed column and capillary column.
Temperature-controlling system: temperature directly affects selection separation, the sensitivity and stability of detector of chromatographic column.Control temperature
Mainly the temperature of chromatograph box, vaporizer, sensing chamber is controlled.
Detection and record system: detector is a kind of amount (telecommunications that will be changed into measurement in carrier gas by the amount of separation component
Number) device.Record system is a kind of device that can automatically record the electric signal by detector output.
Specific embodiment:
Heating: temperature control knob is adjusted to tract below at about 30 DEG C of operation temperature to gas chromatograph heating when excess temperature is to about
Temperature control knob is gradually adjusted to platform right position again and set by with the instruction of platform temperature and heating lamp when for operation temperature
It adjusts pond balance: adjusting pond balance that thermal conductivity bridge balance is really adjusted to be allowed to the output that more platform is suitable and say adjusting skill
Skilful is returned to zero etc. to balancing, return to zero and record with pond in fact.
First step is balanced with pond or recorder pointer is adjusted to platform right position and set by zeroing knob；
Second step self damping is to l6 times or so observation recorder pointer situation of movement；
Recorder pointer is recalled to original place with record zero knob of meaning by third step；
4th step retracts decaying observation recorder pointer situation of movement；
5th step zeroing or pond balance knob and recorder pointer are recalled to original place
Igniting: flame gas chromatograph needs to light a fire when being switched on.It increases hydrogen flowing quantity method and first increases hydrogen flowing quantity, light
After fire, then slowly recall to working condition.
The adjusting of gas ratio: the flow-rate ratio of three gas of flame gas chromatograph.Relevant information is suggested are as follows: nitrogen: hydrogen: empty
Gas: l:l:10 but due to spinner flowmeter instruction flow inaccuracy, should be each gas ancient type of banner hoisted on a featherdecked mast with matched well.Purpose is existing
High detector sensitivity can have preferable separating effect to be also not to be easy to stop working again.
It should be adjusted by the following method in line with mentioned above principle gas ratio:
(1) adjusting of nitrogen flow is after chromatography column condition determines, the stream of the quality of sample component separating effect, nitrogen
When amount size is that determinant adjusts nitrogen flow.Want sample introduction observation component separation situation until nitrogen flow it is as big as possible and
Until sample component has preferably separation.
(2) regulating effect of hydrogen and the adjusting hydrogen and air mass flow of air mass flow.It can be examined with the size of base flow
It tests first adjusting hydrogen flowing quantity to be allowed to be approximately equal to the flow of nitrogen, then adjusts air mass flow；Base is observed when adjusting air mass flow
As long as the change situation base flow of stream is increasing, it should adjust in opposite directions, until base flow is not further added by incessantly.Finally again by hydrogen flowing quantity
Up-regulation is a little.
Sample introduction: sample volume is appropriate, in the case where detector sensitivity allows, sample volume as few as possible.
Technical indicator is as follows:
While there has been shown and described that the embodiments of the present invention, for the ordinary skill in the art,
It is understood that a variety of to the progress of these embodiments can change without departing from the principles and spirit of the present invention, modify,
Replacement and variant, the scope of the present invention is defined by the appended.
Claims (3)
1. a kind of gas chromatographicanalyzer for VOC on-line analysis, which is characterized in that it includes carrier gas high-pressure cylinder (1), subtracts
Pressure valve (2), clarifier (4), flow control valve (5), spinner flowmeter (6), vaporizing chamber (8), chromatographic column (9), detector
(10), recorder (11)；
It is provided with pressure reducing valve (2) in the upper end of carrier gas high-pressure cylinder (1), the other end of pressure reducing valve (2) connects clarifier (4), only
The other end for changing device (4) connects flow control valve (5), and the other end of flow control valve (5) connects spinner flowmeter (6), rotor
Flowmeter (6) connects vaporizing chamber (8), and vaporizing chamber (8) is connected with detector (10), and recorder (11) is connect with detector (10).
2. the gas chromatographicanalyzer according to claim 1 for VOC on-line analysis, it is characterised in that: first pressure
Table (3) is set between pressure reducing valve (2) and clarifier (4).
3. the gas chromatographicanalyzer according to claim 1 for VOC on-line analysis, it is characterised in that: second pressure
Table (7) is set between spinner flowmeter (6) and vaporizing chamber (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820909635.7U CN208350726U (en) | 2018-06-13 | 2018-06-13 | Gas chromatographicanalyzer for VOC on-line analysis |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820909635.7U CN208350726U (en) | 2018-06-13 | 2018-06-13 | Gas chromatographicanalyzer for VOC on-line analysis |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208350726U true CN208350726U (en) | 2019-01-08 |
Family
ID=64883569
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820909635.7U Expired - Fee Related CN208350726U (en) | 2018-06-13 | 2018-06-13 | Gas chromatographicanalyzer for VOC on-line analysis |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208350726U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114235987A (en) * | 2021-11-25 | 2022-03-25 | 广东烟草广州市有限公司 | Method and device for identifying authenticity of electronic cigarette based on headspace-gas chromatography |
| CN116087387A (en) * | 2023-04-07 | 2023-05-09 | 淄博市食品药品检验研究院 | Sample introduction device for gas chromatograph |
-
2018
- 2018-06-13 CN CN201820909635.7U patent/CN208350726U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114235987A (en) * | 2021-11-25 | 2022-03-25 | 广东烟草广州市有限公司 | Method and device for identifying authenticity of electronic cigarette based on headspace-gas chromatography |
| CN116087387A (en) * | 2023-04-07 | 2023-05-09 | 淄博市食品药品检验研究院 | Sample introduction device for gas chromatograph |
| CN116087387B (en) * | 2023-04-07 | 2023-07-18 | 淄博市食品药品检验研究院 | Sample introduction device for gas chromatograph |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190108 |