CN208350727U - A kind of gas chromatograph for vinyl chloride analysis - Google Patents
A kind of gas chromatograph for vinyl chloride analysis Download PDFInfo
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- CN208350727U CN208350727U CN201821035891.4U CN201821035891U CN208350727U CN 208350727 U CN208350727 U CN 208350727U CN 201821035891 U CN201821035891 U CN 201821035891U CN 208350727 U CN208350727 U CN 208350727U
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- temperature
- vinyl chloride
- sample introduction
- controlled compartment
- introduction pipeline
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Abstract
The utility model discloses a kind of gas chromatographs for vinyl chloride analysis, including sampling system and separation system；The sampling system includes sample introduction pipeline and the six-way valve that is connected to the sample introduction pipeline；The separation system includes refrigerating plant, column oven and the chromatographic column being placed in column oven, and the refrigerating plant is connected to by connecting tube with the column oven；The column oven offers the exhaust outlet for exhaust.It has the effect of improving vinyl chloride analysis precision.
Description
Technical field
The utility model relates to a kind of gas chromatograph, more specifically to a kind of gas phase color for vinyl chloride analysis
Spectrometer.
Background technique
In People's Republic of China's chemical industry standard HG/T 3945-2007 " survey of vinyl chloride monomer organic impurity content
When being detected using gas-chromatography to the organic impurities in vinyl chloride in calmly ", column oven is usually analyzed since room temperature.From normal
Temperature start analysis will lead to it is limited for the separating capacity compared with light impurity component, when the light components such as ethylene, acetylene impurity content compared with
Gao Shi, will lead to impurity can not be kept completely separate, therefore can reduce the precision of vinyl chloride analysis.
Utility model content
The technical problem to be solved by the present invention is to provide a kind of gas chromatographs for vinyl chloride analysis, have
Improve the effect of vinyl chloride analysis precision.
In order to solve the above-mentioned technical problem, the utility model provides a kind of gas chromatograph for vinyl chloride analysis,
Including sampling system and separation system；The sampling system includes sample introduction pipeline and the six-way valve that is connected to the sample introduction pipeline；
The separation system includes refrigerating plant, column oven and the chromatographic column being placed in column oven, and the refrigerating plant passes through connection
Pipe is connected to the column oven；The column oven offers the exhaust outlet for exhaust.
Further, the sampling system includes nitrogen purge system and auxiliary device, and the nitrogen purge system includes
Nitrogen gas tank, the nitrogen gas tank are connected to by the first cleaning pipe with the sample introduction pipeline；First is provided on the first cleaning pipe
Switch valve, the sample introduction pipeline are located at entrance and are provided with the 4th switch valve；The auxiliary device is to assist the nitrogen gas tank
Interior nitrogen is passed through in the sample introduction pipeline.
Further, the auxiliary device includes vacuum pump, and the vacuum pump passes through the second cleaning pipe and the sample feeding pipe
Line connection；Second switch valve is provided on the second cleaning pipe, and the sample introduction pipeline is located at the first switch valve and described
Third switch valve is provided between six-way valve.
Further, the refrigerating plant includes refrigerant storage tank, temperature controlled compartment and temperature adjustment component, and the temperature controlled compartment passes through
The connecting tube is connected to the column oven, and the refrigerant storage tank is connected to by air inlet pipe with the temperature controlled compartment；The tune
Warm component includes compression pump and aseptic filter membrane, and the compression pump is connected to by temperature adjustment pipe with the temperature controlled compartment, the temperature adjustment pipe
The connectivity part of the temperature controlled compartment is provided with the aseptic filter membrane.
Further, the temperature sensor for detecting its internal temperature, the temperature controlled compartment are provided in the temperature controlled compartment
It is provided with the temperature indicator being electrically connected with the temperature sensor outside.
Further, flow control valve is provided on the air inlet pipe and the temperature adjustment pipe.
Further, the column oven, which is located at the exhaust outlet, is embedded with exhaust fan.
The utility model has the beneficial effects that
1, cooling processing is carried out to column oven by increasing refrigerating plant, so that column oven is started to warm up from subzero,
It can be improved the separating effect of light component impurity, to improve the precision of vinyl chloride analysis；
2, the separating effect that light component is improved by refrigerating plant, can reduce the time required when post analysis, thus
Analysis program can be optimized, shorten the time of analysis.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model.
Wherein, 1, sample introduction pipeline；11, third switch valve；12, the 4th switch valve；13, sample；2, nitrogen gas tank；21, first
Cleaning pipe；211, first switch valve；3, vacuum pump；31, the second cleaning pipe；311, second switch valve；4, column oven；41, air draft
Mouthful；411, exhaust fan；5, chromatographic column；6, temperature controlled compartment；61, temperature sensor；62, temperature indicator；63, connecting tube；7, it compresses
Pump；71, temperature adjustment pipe；711, flow control valve；72, aseptic filter membrane；8, refrigerant storage tank；81, air inlet pipe；9, casing.
Specific embodiment
The utility model is described in further detail in the following with reference to the drawings and specific embodiments, so that those skilled in the art
The utility model may be better understood and can be practiced, but illustrated embodiment is not as the restriction to the utility model.
Embodiment
A kind of gas chromatograph for vinyl chloride analysis, referring to Fig.1, including carrier gas system, sampling system, segregative line
System, detector and data processing system, sampling system include sample introduction pipeline 1 and six-way valve, and sample 13 is entered by sample introduction pipeline 1
It is handled inside six-way valve and entrance separation system.Sample volume is controlled using six-way valve sample introduction and by using quantity tube.Cause
It is the prior art for six-way valve and quantity tube, therefore details are not described herein.
Referring to Fig.1, nitrogen purge system and auxiliary device are provided on sample introduction pipeline 1, nitrogen purge system can be cleared up
Remaining sample 13 in sample introduction pipeline 1 and six-way valve reduces cross contamination.Nitrogen purge system includes nitrogen gas tank 2, nitrogen gas tank 2
It is connected to by the first cleaning pipe 21 with sample introduction pipeline 1, and first cleans first be provided on pipe 21 for control piper on-off
Switch valve 211.For auxiliary device for assisting the nitrogen in nitrogen gas tank 2 to enter the inside of sample introduction pipeline 1, auxiliary device includes vacuum
Pump 3, vacuum pump 3 are connected to by the second cleaning pipe 31 with sample introduction pipeline 1.It is provided on second cleaning pipe 31 clear for controlling second
The second switch valve 311 of clean 31 on-off of pipe.Third switch valve 11 and the 4th switch valve 12 are provided on sample introduction pipeline 1, third is opened
It closes valve 11 to be arranged between first switch valve 211 and column oven 4, the 4th switch valve 12 is arranged at the feed inlet of sample 13.When
It before sample introduction, is first shut off on first switch valve 211, third switch valve 11 and the 4th switch valve 12, opens second switch valve 311,
Sample introduction pipeline 1 will be evacuated to vacuum by vacuum pump 3；It is then shut off second switch valve 311 and the 4th switch valve 12, keeps first
Switch valve 211 and third switch valve 11 are opened, so that the nitrogen inside nitrogen gas tank 2 purges sample introduction pipe fitting and six-way valve.
First switch valve 211, second switch valve 311, third switch valve 11 and the 4th switch valve 12 are all made of ball valve in the present embodiment.
Referring to Fig.1, separation system includes column oven 4, chromatographic column 5 and refrigerating plant, the sample 13 conveyed from sampling system
It is handled in into the chromatographic column 5 being placed in column oven 4.Refrigerating plant includes refrigerant storage tank 8, temperature controlled compartment 6 and adjusts
Warm component, temperature controlled compartment 6 are connected to by connecting tube 63 with column oven 4.Refrigerant, refrigerant are placed with inside refrigerant storage tank 8
Air inlet pipe 81 is communicated between storage tank 8 and temperature controlled compartment 6.Temperature adjustment component includes compression pump 7 and several aseptic filter membranes 72, compression
Pump 7 is connected to by temperature adjustment pipe 71 with temperature controlled compartment 6.Whole aseptic filter membranes 72 is bonded in the company of temperature controlled compartment 6 and temperature adjustment pipe 71
Place is met, the side of aseptic filter membrane 72 and the inner wall of temperature controlled compartment 6 are adhesively fixed, and convey so as to filter and purify compression pump 7
Into air.When importing 6 inside of temperature controlled compartment by air inlet pipe 81 after the refrigerant vaporization inside refrigerant storage tank 8, compression pump 7
Work imports two kinds of gases inside temperature controlled compartment 6 in temperature control to compress the air of external room temperature into inside temperature controlled compartment 6
It is mixed in room 6, so as to control the temperature for flowing into the gas inside column oven 4 from temperature controlled compartment 6.So as to realize
In some subzero temperature is maintained to the chromatographic column 5 being placed on inside column oven 4 the specific time, so as to improve vinyl chloride
The precision of analysis.
Referring to Fig.1, the temperature inside temperature controlled compartment 6 is controlled for convenience, is provided with flow control valve 711 on temperature adjustment pipe 71,
Normal temperature air can be adjusted by flow control valve 711 and enters rate inside temperature controlled compartment 6, to adjust in temperature controlled compartment 6 two kinds
Temperature inside the number and then change controlling chamber of air.Regulate and control the temperature inside temperature controlled compartment 6 using flow control valve 711 simultaneously
Degree, facilitates the use of operator.
Referring to Fig.1, for the ease of the temperature inside detection temperature controlled compartment 6, temperature controlled compartment 6 is internally provided with temperature sensor
61, the temperature indicator 62 being electrically connected with temperature sensor 61 is fixed on the outer wall of temperature controlled compartment 6.Temperature sensor 61 will test
To temperature signal be changed into electric signal transmission to temperature indicator 62, temperature indicator 62 is shown based on the received electrical signal
Corresponding temperature value.
Referring to Fig.1, the gas inside temperature controlled compartment 6 by connecting tube 63 enter column oven 4 inside to chromatographic column 5 at
Reason, while exhaust outlet 41 is offered on column oven 4.In order to further improve 4 internal gas exchange rate of column oven and stream
Rate is moved, is embedded with exhaust fan 411 at exhaust outlet 41.
In another embodiment, referring to Fig.1, in order to improve between the gas and chromatographic column 5 that connecting tube 63 is transmitted out
The outer cover of heat exchange, chromatographic column 5 is equipped with casing 9, and the air inlet of casing 9 is connected to connecting tube 63, the gas outlet of casing 9 and column
The exhaust outlet 41 of incubator 4 is arranged.Gas in connecting tube 63 is directly entered the inside of casing 9, when gas is in 9 internal flow of casing
When, gas and chromatographic column 5 inside casing 9 carry out heat exchange, to realize the processing of the cooling to chromatographic column 5.
Casing 9 can not also be contacted with the outer wall of chromatographic column 5 in another embodiment, and bracket can be used and consolidate casing 9
Surely it is placed on the outside of chromatographic column 5.When gas is in 9 internal flow of casing, gas can and chromatographic column 5 around gas it is quick
Carry out heat exchange, to reduce the temperature of chromatographic column 5.
Embodiment described above is only preferred embodiments for fully illustrating the utility model, the utility model
Protection scope it is without being limited thereto.Those skilled in the art made equivalent substitute or change on the basis of the utility model
It changes, both is within the protection scope of the present invention.The protection scope of the utility model is subject to claims.
Claims (7)
1. a kind of gas chromatograph for vinyl chloride analysis, which is characterized in that including sampling system and separation system；It is described into
Sample system includes sample introduction pipeline and the six-way valve that is connected to the sample introduction pipeline；The separation system includes refrigerating plant, column temperature
Case and the chromatographic column being placed in column oven, the refrigerating plant are connected to by connecting tube with the column oven；The column oven
Offer the exhaust outlet for exhaust.
2. the gas chromatograph for vinyl chloride analysis as described in claim 1, which is characterized in that the sampling system includes
Nitrogen purge system and auxiliary device, the nitrogen purge system include nitrogen gas tank, the nitrogen gas tank by first cleaning pipe with
The sample introduction pipeline connection；First switch valve is provided on the first cleaning pipe, the sample introduction pipeline is located at entrance setting
There is the 4th switch valve；The auxiliary device is to assist the nitrogen in the nitrogen gas tank to be passed through in the sample introduction pipeline.
3. the gas chromatograph for vinyl chloride analysis as claimed in claim 2, which is characterized in that the auxiliary device includes
Vacuum pump, the vacuum pump are connected to by the second cleaning pipe with the sample introduction pipeline；Second is provided on the second cleaning pipe
Switch valve, the sample introduction pipeline are provided with third switch valve between the first switch valve and the six-way valve.
4. the gas chromatograph for vinyl chloride analysis as described in claim 1, which is characterized in that the refrigerating plant includes
Refrigerant storage tank, temperature controlled compartment and temperature adjustment component, the temperature controlled compartment are connected to by the connecting tube with the column oven, the system
Cryogen storage tank is connected to by air inlet pipe with the temperature controlled compartment；The temperature adjustment component includes compression pump and aseptic filter membrane, described
Compression pump is connected to by temperature adjustment pipe with the temperature controlled compartment, and the connectivity part of the temperature adjustment pipe and the temperature controlled compartment is provided with described sterile
Filter membrane.
5. the gas chromatograph for vinyl chloride analysis as claimed in claim 4, which is characterized in that setting in the temperature controlled compartment
There is the temperature sensor for detecting its internal temperature, the temperature being electrically connected with the temperature sensor is provided with outside the temperature controlled compartment
Spend display.
6. the gas chromatograph for vinyl chloride analysis as claimed in claim 4, which is characterized in that the air inlet pipe and described
Flow control valve is provided on temperature adjustment pipe.
7. the gas chromatograph for vinyl chloride analysis as described in claim 1, which is characterized in that the column oven is located at institute
It states and is embedded with exhaust fan at exhaust outlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821035891.4U CN208350727U (en) | 2018-07-02 | 2018-07-02 | A kind of gas chromatograph for vinyl chloride analysis |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821035891.4U CN208350727U (en) | 2018-07-02 | 2018-07-02 | A kind of gas chromatograph for vinyl chloride analysis |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208350727U true CN208350727U (en) | 2019-01-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821035891.4U Active CN208350727U (en) | 2018-07-02 | 2018-07-02 | A kind of gas chromatograph for vinyl chloride analysis |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112834668A (en) * | 2020-12-30 | 2021-05-25 | 中国原子能科学研究院 | Low-temperature control device for analyzing hydrogen isotopes by gas chromatography |
-
2018
- 2018-07-02 CN CN201821035891.4U patent/CN208350727U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112834668A (en) * | 2020-12-30 | 2021-05-25 | 中国原子能科学研究院 | Low-temperature control device for analyzing hydrogen isotopes by gas chromatography |
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