CN109765318A - A kind of detection device and method of non-methane total hydrocarbons - Google Patents
A kind of detection device and method of non-methane total hydrocarbons Download PDFInfo
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- CN109765318A CN109765318A CN201910115806.8A CN201910115806A CN109765318A CN 109765318 A CN109765318 A CN 109765318A CN 201910115806 A CN201910115806 A CN 201910115806A CN 109765318 A CN109765318 A CN 109765318A
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- methane
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Abstract
The invention belongs to gas detection technology fields, are related to the detection device and method of a kind of non-methane total hydrocarbons.Detection device includes multichannel sampling valve, the first quantitative loop, the second quantitative loop and detector, and changeable quantitative model and detection pattern are formed by multichannel sampling valve；The quantitative model is the sample gas channel including the first quantitative loop, the second quantitative loop；The detection pattern is two carrier gas passages, and a carrier gas passage includes the first quantitative loop and methane column, and a carrier gas passage includes the second quantitative loop and total hydrocarbon column；Described two carrier gas passage connecting detection devices.The detection device and method of non-methane total hydrocarbons provided by the invention may conform to the detection that twin columns in HJ38-2017 standard realize non-methane total hydrocarbons, simple flow using ten four-way valves, while can solve the problems, such as that existing non-methane total hydrocarbons structure of the detecting device is complicated.Have many advantages, such as that structure is simple, installs and easy to operate.
Description
Technical field
The invention belongs to gas detection technology field, in particular to a kind of detection device of novel methane non-methane total hydrocarbons and
Method.
Background technique
Non-methane total hydrocarbons (NMHC) refers to other all general names with volatile hydrocarbon in addition to methane,
Such as alkane, alkene, aromatic hydrocarbon and oxygen-containing the hydrocarbon component.When NMHC is more than a certain concentration in environment, human health can be generated
It directly endangers, many volatile organic matters have carcinogenesis to human body.When non-methane total hydrocarbons is anti-by chemistry under illumination condition
Photochemical fog and ozone should be generated, immeasurable damage is caused to human environment.
Therefore, monitor the NMHC in surrounding air and industrial waste gas be very it is necessary to, our countries these years recently
Also the supervision dynamics to NMHC in environment is increased.There are many detection methods of NMHC, but majority state is all made of gas-chromatography
Method.The detection method for the content that HJ38-2017 standard middle finger goes out gas chromatography NMHC is to be directly injected into gaseous sample to have
The gas chromatograph of flame ionization ditector, measures the content of total hydrocarbon and methane on total hydrocarbon column and methane column respectively, and two
The difference of person is the content of NMHC.
The common test method of existing non-methane total hydrocarbons detection device have it is logical or single 10 lead to and realize detection using single 6,
But this method does not meet the requirement that twin columns in HJ38 detect, and use two multichannel sampling valves such as double ten it is logical, ten it is logical plus
The six apparatus structure complexity for leading to realize methane and total hydrocarbon, while multichannel carrier gas is needed, if two multichannel sampling valves are cut
The asynchronous inaccuracy that will also result in analysis data of valve.
Therefore, that there are prohibited data detections is true for existing non-methane total hydrocarbons detection device, and complex structure and other problems.Institute
It is badly in need of inventing a kind of non-methane total hydrocarbons on-line measuring device and method with, those skilled in the art, exists to solve the prior art
The problem of.
Summary of the invention
In order to solve the deficiency in prior art, the purpose of the present invention is to provide a kind of detections of non-methane total hydrocarbons
Device and method.The device overcomes the shortcomings that structure is complicated in the prior art, while improving the accuracy of detection.
In order to achieve the above object, main technical schemes of the invention: the detection device of non-methane total hydrocarbons, it is characterised in that
It includes multichannel sampling valve, the first quantitative loop, the second quantitative loop and detector, is formed by multichannel sampling valve changeable
Quantitative model and detection pattern；The quantitative model is the sample gas channel including the first quantitative loop, the second quantitative loop；It is described
Detection pattern is two carrier gas passages, and carrier gas passage includes the first quantitative loop and methane column, and a carrier gas passage includes the
Two quantitative loops and total hydrocarbon column；Described two carrier gas passage connecting detection devices.
Preferably, described includes that the carrier gas passage of the first quantitative loop and methane column is connect by solenoid valve with detector.
The multichannel sampling valve is ten four-way valves.
The solenoid valve is two-position three-way valve.
The detection device is placed in the high-temperature cabinet of temperature programmed control.
The detector difference selects fid detector.
The present invention also provides the detection methods using above-mentioned non-methane total hydrocarbons detection device, it is characterised in that including following
Step:
A, quantitative: switching multichannel sampling valve is quantitative model, and sample gas passes through the sample gas including the first quantitative loop, the second quantitative loop
Channel exports from sample gas and is discharged, and the first quantitative loop and the second quantitative loop quantitatively save sample gas, realizes that the acquisition of sample gas quantified
Journey, the first quantitative loop and the second quantitative loop sample gas collected are used to analyze the content of methane and total hydrocarbon；
B, detect: switching multichannel sampling valve is detection pattern, including CH_4 detection and total hydrocarbon detection:
CH_4 detection: carrier gas is by the carrier gas passage including the first quantitative loop and methane column, the sample that will be saved in the first quantitative loop
Gas is brought into methane column, and carrier gas carrying methane gas enters detector realization through solenoid valve and divides the quantitative of methane after methane column
Analysis；
Total hydrocarbon detection: carrier gas is by the carrier gas passage including the second quantitative loop and total hydrocarbon column, the sample that will be saved in the second quantitative loop
Gas is brought into total hydrocarbon column, and quantitative analysis of the detector realization to total hydrocarbon is entered after total hydrocarbon column；
C, blowback: after in methane, device carries out quantitative analysis after testing, switching multichannel sampling valve is quantitative model, solenoid valve
It is switched to carrier gas to put idle discharge, carrier gas goes out chromatographic column to methane column blowback, by non-methane substance blowback in methane column, realizes quick
It tests and analyzes；
D, non-methane total hydrocarbons content is obtained according to the content that the total hydrocarbon content detected in step B subtracts methane.
Multichannel sampling valve of the invention, by change flow direction between valve passage can it is quantitative between detection pattern into
Row switching.When switching multichannel sampling valve is quantitative model, sample gas passes through the sample including the first quantitative loop and the second quantitative loop
Gas channel, realizes the collection process of sample gas, and the first quantitative loop and the second quantitative loop sample gas collected are for analyzing methane and total
The content of hydrocarbon；When switching multichannel sampling valve is detection pattern, carrier gas is by including the first quantitative loop and methane column, the two the
The carrier gas passage of quantitative loop and total hydrocarbon column can realize the analysis of methane and total hydrocarbon content in sample gas into detector respectively.
The solenoid valve that the present invention uses, main function are to realize the blowback to non-methane substance.
The high-temperature cabinet that the present invention uses is for heating the detection device of the novel methane non-methane total hydrocarbons.
The detection device and method of non-methane total hydrocarbons provided by the invention may conform to HJ38- using ten four-way valves
Twin columns realize the detection of non-methane total hydrocarbons, simple flow in 2017 standards, while can solve existing non-methane total hydrocarbons detection device
The problem of structure is complicated.
The present invention has many advantages, such as that structure is simple, installs and easy to operate.
Detailed description of the invention
Fig. 1 is the structural schematic diagram that detection device of the embodiment of the present invention is quantitative model and blowback state.
Fig. 2 is the structural schematic diagram that detection device of the embodiment of the present invention is methane and total hydrocarbon detection pattern.
In figure, the serial number 1-14 on multichannel sampling valve respectively corresponds 14 channels of ten four-way valves.
Specific embodiment
The following is an embodiment of the present invention, and in conjunction with attached drawing, technical scheme is described further, but this hair
It is bright to be not limited to these embodiments.
Embodiment: the detection device of non-methane total hydrocarbons is mainly quantified including multichannel sampling valve, the first quantitative loop, second
Ring and detector form changeable quantitative model and detection pattern by multichannel sampling valve；The quantitative model is one
Sample gas channel including the first quantitative loop, the second quantitative loop；The detection pattern is two carrier gas passages, a carrier gas passage packet
The first quantitative loop and methane column are included, a carrier gas passage includes the second quantitative loop total hydrocarbon column；Described two carrier gas passage connection inspections
Survey device.
In embodiment, the carrier gas passage including the first quantitative loop and methane column is connect by solenoid valve with detector.
The multichannel sampling valve of detection device is ten four-way valves in embodiment, and solenoid valve is two-position three-way valve, and detector is adopted
Use fid detector.
The detection device of embodiment is placed in the high-temperature cabinet of temperature programmed control.
Detection method using embodiment detection device is as follows:
With reference to attached drawing 1, be the acquisition quantitative model of sample gas: sample gas enters in multichannel sampling valve by sample gas channel 11, sample
Gas, using the first quantitative loop to the channel of multichannel sampling valve 9, is reached from channel 11 to channel 12 using 10,5,6 channels
Second quantitative loop, then 3 to 4 through multichannel sampling valve, it is discharged from 4 channels, which realizes sample
The quantitative collection process of gas.Carrier gas 1 reaches methane column by channel 2, channel 1, reaches channel 13, channel using methane column
14, fid detector is reached by solenoid valve.Carrier gas 2 reaches fid detector using total hydrocarbon column by channel 8 to channel 7, adopts
With hydrogen and hydrocarbon air is removed as combustion-supporting gas.
With reference to attached drawing 2, be the analysis detection mode of sample gas: multichannel sampling valve is cut after the quantitative collection for realizing sample gas
The state that change of current road is shown to Fig. 2, in this state, sample gas successively pass through the channel 11 of multichannel sampling valve, channel 10, channel
5 reach channels 4, realize sample gas to air discharge, carrier gas 2 by multichannel sampling valve channel 8, that channel 9 reaches first is quantitative
Ring carries in the first quantitative loop sample gas and reaches in methane column by channel 12, channel 13, enter after methane column channel 1,
Channel 14 reaches fid detector through solenoid valve again.Carrier gas 1 carries the sample gas in the second quantitative loop by logical through channel 2, channel 3
Road 6, channel 7 reach total hydrocarbon column, enter fid detector by total hydrocarbon column, since the reserve capability of total hydrocarbon column is weak, in methane appearance
The total hydrocarbon content in sample gas can detecte out before.Non-methane is can be obtained into the content that the content of total hydrocarbon subtracts methane
The data of total hydrocarbon.
Be blowback state with reference to attached drawing 1: after analysis phase total hydrocarbon and methane content measurement, multichannel sampling valve will
Flow path switches to the quantitative state of acquisition, and carrier gas at this time 1 reversely blows to obtain methane column by channel 2, channel 1, by first non-in methane column
Alkane substance blows out methane column, reaches solenoid valve using channel 13, channel 14, solenoid valve is switched to dummy status, carrier gas 1 at this time
Non-methane substance can be blown out chromatographic column to get into the air, to realize the quick detection of whole device.
Heating mode is opened, so that the above process carries out at a suitable temperature.
The detection device of embodiment may conform to twin columns in HJ38-2017 standard using ten four-way valves and realize non-first
The detection of alkane total hydrocarbon, simple flow, while can solve the problems, such as that existing non-methane total hydrocarbons structure of the detecting device is complicated.Using one
Ten four-way valves substitute the detection device that a common ten-way valve adds the methane non-methane total hydrocarbons an of six-way valve, have structure letter
It is single, the advantages that installing and be easy to operate.
Claims (7)
1. a kind of detection device of non-methane total hydrocarbons, it is characterised in that it includes multichannel sampling valve, the first quantitative loop, second fixed
Ring and detector are measured, forms changeable quantitative model and detection pattern by multichannel sampling valve；The quantitative model is one
A includes the sample gas channel of the first quantitative loop, the second quantitative loop；The detection pattern is two carrier gas passages, a carrier gas passage
Including the first quantitative loop and methane column, a carrier gas passage includes the second quantitative loop and total hydrocarbon column；Described two carrier gas passages connect
Connect detector.
2. the detection device of non-methane total hydrocarbons according to claim 1, it is characterised in that including the first quantitative loop and methane
The carrier gas passage of column is connect by solenoid valve with detector.
3. the detection device of non-methane total hydrocarbons according to claim 1, it is characterised in that the multichannel sampling valve is ten
Four-way valve.
4. the detection device of non-methane total hydrocarbons according to claim 2, it is characterised in that the solenoid valve is two-bit triplet
Valve.
5. the detection device of non-methane total hydrocarbons according to claim 1, it is characterised in that the detection device is placed in program
In the high-temperature cabinet of temperature control.
6. the detection device of non-methane total hydrocarbons according to claim 1 or 2, it is characterised in that the detector uses FID
Detection.
7. a kind of detection method using the non-methane total hydrocarbons detection device as described in one of claim 1-5, it is characterised in that packet
Include following steps:
A, quantitative: switching multichannel sampling valve is quantitative model, and sample gas passes through the sample gas including the first quantitative loop, the second quantitative loop
Channel exports from sample gas and is discharged, and the first quantitative loop and the second quantitative loop quantitatively save sample gas, realizes that the acquisition of sample gas quantified
Journey, the first quantitative loop and the second quantitative loop sample gas collected are used to analyze the content of methane and total hydrocarbon；
B, detect: switching multichannel sampling valve is detection pattern, including CH_4 detection and total hydrocarbon detection:
CH_4 detection: carrier gas is by the carrier gas passage including the first quantitative loop and methane column, the sample that will be saved in the first quantitative loop
Gas is brought into methane column, and carrier gas carrying methane gas enters detector realization through solenoid valve and divides the quantitative of methane after methane column
Analysis；
Total hydrocarbon detection: carrier gas is by the carrier gas passage including the second quantitative loop and total hydrocarbon column, the sample that will be saved in the second quantitative loop
Gas is brought into total hydrocarbon column, and quantitative analysis of the detector realization to total hydrocarbon is entered after total hydrocarbon column；
C, blowback: after in methane, device carries out quantitative analysis after testing, switching multichannel sampling valve is quantitative model, solenoid valve
It is switched to carrier gas to put idle discharge, carrier gas goes out chromatographic column to methane column blowback, by non-methane substance blowback in methane column, realizes quick
It tests and analyzes；
D, non-methane total hydrocarbons content is obtained according to the content that the total hydrocarbon content detected in step B subtracts methane.
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| CN201910115806.8A CN109765318A (en) | 2019-02-15 | 2019-02-15 | A kind of detection device and method of non-methane total hydrocarbons |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110927290A (en) * | 2019-12-19 | 2020-03-27 | 常州磐诺仪器有限公司 | Valve sample introduction three-dimensional laboratory gas chromatograph |
| CN111351882A (en) * | 2020-04-10 | 2020-06-30 | 苏州天蓝分析仪器有限公司 | High-low carbon concentration on-line analysis and detection device |
| CN113311090A (en) * | 2021-06-03 | 2021-08-27 | 南京霍普斯科技有限公司 | Online integrated monitoring system and detection method for volatile organic compounds and malodorous substances of fixed pollution source |
| CN114324652A (en) * | 2021-12-29 | 2022-04-12 | 杭州谱育科技发展有限公司 | Gas detection device and method based on chromatographic technology |
| CN114577968A (en) * | 2020-12-02 | 2022-06-03 | 安徽皖仪科技股份有限公司 | Calibration gas circuit and calibration method of non-methane total hydrocarbon continuous monitoring system |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105510478A (en) * | 2015-12-30 | 2016-04-20 | 聚光科技(杭州)股份有限公司 | Online detection device and method of non-methane total hydrocarbon |
| US20160363573A1 (en) * | 2015-06-11 | 2016-12-15 | Live Fresh Inc. | Non-methane total hydrocarbons analysis apparatus and method for the same |
| CN106501399A (en) * | 2016-10-21 | 2017-03-15 | 苏州冷杉精密仪器有限公司 | A kind of methane and NMHC detection method of content |
| CN206788121U (en) * | 2017-06-13 | 2017-12-22 | 南京霍普斯科技有限公司 | A kind of online gas chromatographicanalyzer of methane and NMHC |
| CN107643352A (en) * | 2017-11-14 | 2018-01-30 | 杭州春来科技有限公司 | NMHC detection means and method |
| CN207516330U (en) * | 2017-11-14 | 2018-06-19 | 杭州春来科技有限公司 | Non-methane total hydrocarbons and benzene homologues detection device |
-
2019
- 2019-02-15 CN CN201910115806.8A patent/CN109765318A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160363573A1 (en) * | 2015-06-11 | 2016-12-15 | Live Fresh Inc. | Non-methane total hydrocarbons analysis apparatus and method for the same |
| CN105510478A (en) * | 2015-12-30 | 2016-04-20 | 聚光科技(杭州)股份有限公司 | Online detection device and method of non-methane total hydrocarbon |
| CN106501399A (en) * | 2016-10-21 | 2017-03-15 | 苏州冷杉精密仪器有限公司 | A kind of methane and NMHC detection method of content |
| CN206788121U (en) * | 2017-06-13 | 2017-12-22 | 南京霍普斯科技有限公司 | A kind of online gas chromatographicanalyzer of methane and NMHC |
| CN107643352A (en) * | 2017-11-14 | 2018-01-30 | 杭州春来科技有限公司 | NMHC detection means and method |
| CN207516330U (en) * | 2017-11-14 | 2018-06-19 | 杭州春来科技有限公司 | Non-methane total hydrocarbons and benzene homologues detection device |
Non-Patent Citations (2)
| Title |
|---|
| WANG CH 等: "A New Gas Chromatography Method for Continuous Monitoring of Non-Methane Hydrocarbons as an Analogy of Volatile Organic Compounds in Flue Gas", 《AEROSOL AND AIR QUALITY RESEARCH》 * |
| 朱卫东 等: "工业固定污染源连续排放在线监测技术", 《石油化工自动化》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110927290A (en) * | 2019-12-19 | 2020-03-27 | 常州磐诺仪器有限公司 | Valve sample introduction three-dimensional laboratory gas chromatograph |
| CN111351882A (en) * | 2020-04-10 | 2020-06-30 | 苏州天蓝分析仪器有限公司 | High-low carbon concentration on-line analysis and detection device |
| CN114577968A (en) * | 2020-12-02 | 2022-06-03 | 安徽皖仪科技股份有限公司 | Calibration gas circuit and calibration method of non-methane total hydrocarbon continuous monitoring system |
| CN113311090A (en) * | 2021-06-03 | 2021-08-27 | 南京霍普斯科技有限公司 | Online integrated monitoring system and detection method for volatile organic compounds and malodorous substances of fixed pollution source |
| CN114324652A (en) * | 2021-12-29 | 2022-04-12 | 杭州谱育科技发展有限公司 | Gas detection device and method based on chromatographic technology |
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