CN206974972U - A kind of NMHC gas analyzer - Google Patents
A kind of NMHC gas analyzer Download PDFInfo
- Publication number
- CN206974972U CN206974972U CN201720569997.1U CN201720569997U CN206974972U CN 206974972 U CN206974972 U CN 206974972U CN 201720569997 U CN201720569997 U CN 201720569997U CN 206974972 U CN206974972 U CN 206974972U
- Authority
- CN
- China
- Prior art keywords
- opening
- flame ionization
- flow controller
- nmhc
- ionization ditector
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Abstract
The utility model discloses a kind of NMHC gas analyzer, including the first flame ionization ditector and the second flame ionization ditector, also include ten-way valve, ten-way valve is provided with ten openings, opening 1~opening ten, quantitative loop is provided between 3rd opening and the tenth opening, the first chromatographic column is provided between 5th opening and the 9th opening, 6th opening is connected with triple valve, one end of triple valve is connected with the first flame ionization ditector, the other end is connected with hydrocarbon selective oxidation device in turn, second chromatographic column and the second flame ionization ditector, first flame ionization ditector and the second flame ionization ditector are connected with terminal device.NMHC gas analyzer provided by the utility model, can effectively improve the detectability of analyzer and the accuracy of detection data, and accuracy of detection can reach ppb ranks, the discharge of strict management and control contaminating enterprises, it is ensured that the strict improvement of atmosphere pollution.
Description
Technical field
The utility model belongs to gas monitoring techniques field, and in particular to a kind of NMHC gas analyzer.
Background technology
In recent years because the high speed development of domestic economy, the quickening of industrialization and urbanization process, vehicle guaranteeding organic quantity are anxious
Increase severely plus, the industry such as the primary pollution source petrochemical industry of volatile organic matter, automobile, household electrical appliances, fine chemistry industry increases very fast, and volatility has
Solvent usage amount is big, causes VOC (volatile organic compounds, abbreviation VOCs) to discharge
Amount is big, and VOCs refers at normal temperatures, various organic compounds of the boiling point at 50 DEG C~260 DEG C.VOCs presses its chemical constitution, can be with
It is further divided into：Alkanes, aromatic hydrocarbons, esters, aldehydes and other etc..What is identified at present has kind more than 300.It is most common to have
Benzene,toluene,xylene, styrene, trichloro ethylene, chloroform, trichloroethanes, diisocyanate (TDI), two isocyanide toluene esters
Deng it is the hydrocarbon that combine by carbon, hydrogen and oxygen of ground atom, and VOCs discharge capacitys, which cross conference, causes photochemical smog pollution sternly
Weight, and then produce a series of secondary pollution.In these secondary pollutions, ozone accounts for the largest percentage.Numerous research tables
Bright, ozone has extremely strong harmfulness to human body, material, crops.In addition, VOCs rises in the circulation of troposphere photochemical oxidation
To more crucial effect, it is the important as precursors thing of the secondary gaseous contaminant in city and region, directly or indirectly controls light
The formation speed and efficiency of oxidant, there is very important influence to atmospheric oxidn potentiality.
Discharge of the China to VOCs at present incorporates overall control index, especially, total to the methane in VOCs, non-methane
The monitoring of hydrocarbon and benzene homologues is listed in the important with uncontrollable discharge in a organized way of China each place industrial park stationary source
Monitoring index, the VOCs concentration informations in air are quickly and accurately monitored, and be in safe range the control of these information
Control the effective means of VOCs discharge capacitys.In the market typically uses HJ/T 38-1999 to the analysis method of methane, non-methane《Gu
Determine measure-gas chromatography of NMHC in pollution sources exhaust》Chromatography, this method is mainly total by using non-methane
Appropriate hydrocarbon gas detector is monitored analysis, and it is that one kind uses electrochemistry, photoion (PID) sensor or laser spectral analysis side
Method detects the analytical instrument of the NMHC in ambient air, can quickly test and analyze NMHC in environment
Concentration, several indexs such as detection hydrogen fluoride, hydrogen chloride, ammonia, hydrogen sulfide, methyl mercaptan, TVOC can be increased simultaneously, there is measurement
The features such as precision is high, reliability is high, the response time is fast, applied widely, indices meet or exceed similar products at home and abroad,
It can be widely applied to the occasions such as environmentally friendly on-line monitoring, Industry Control, safety monitoring.
The company of worldwide production methane/NMHC analyzer has much at present, and most of quantified using blank pipe
Ring (1 milliliter to 5 milliliters) sample introduction, does not have enrichment function, surveys the concentration requirement more up to ppm of methane and NMHC
The concentration of level, detectable limit methane and NMHC is all 50ppb, and the accuracy of the lower detection data of concentration is lower；It is few
Part company is adsorbed using primary adsorption agent normal temperature, but normal temperature absorption is for the adsorption capacity pole of C2 to C6 low-carbon organic matter
It is weak, but also influenceed by atmospheric humidity, therefore the test limit of NMHC is lifted less.And as Environmental is dirty
The strict demand of dye, it is necessary to lift the detectability of instrument, the discharge of strict control pollution.
The disadvantage of existing methane/NMHC analyzer is：The non-methane for being only able to detect ppm level concentration is total
Hydrocarbon, it can not be detected for the non-methane hydrocarbon emission of ppb levels even sub- ppb levels, be unfavorable for the preventing and treating of atmosphere pollution.
Utility model content
The defects of existing for prior art, the utility model provide a kind of detection that can effectively lift NMHC
The limit and the methane/NMHC gas analyzer for detecting data accuracy.
The purpose of this utility model is achieved through the following technical solutions：
A kind of NMHC gas analyzer, including the first flame ionization ditector and the second hydrogen flameionization
Detector, in addition to ten-way valve, the ten-way valve are provided with ten openings, respectively first is open, second is open, the 3rd is open,
4th opening, the 5th opening, the 6th opening, the 7th opening, the 8th opening, the 9th opening and the tenth opening, first opening
For testing sample gas import, second opening is the outlet of testing sample gas, and the 4th opening and the described 7th opening are load
Gas entrance, the 4th opening are connected with the 3rd opening by pipeline, and the 8th opening is connected with damper tube, and the described 3rd opens
Quantitative loop is provided between mouth and the tenth opening, the first chromatographic column is provided between the 5th opening and the 9th opening, it is described
6th opening is connected with triple valve, and one end of the triple valve is connected with the first flame ionization ditector, and the other end is successively
Be connected with hydrocarbon selective oxidation device, the second chromatographic column and the second flame ionization ditector, first hydrogen flame from
Sonization detector and the second flame ionization ditector are connected with terminal device.
Preferably, wherein also including molecular sieve filter and first flow controller, the molecular sieve filter with it is described
First flow controller is by pipeline communication, and the first flow controller and the inlet end of the described first opening pass through pipeline
Connection.
Preferably, wherein also including second flow controller and the 3rd flow controller, the second flow controller with
The inlet end of 4th opening is connected by pipeline, and the 3rd flow controller and the inlet end of the described 7th opening pass through
Pipeline connects.
Preferably, wherein first chromatographic column is polarity capillary column, the polarity capillary column is alundum (Al2O3) capillary
Post or molecular sieve capillary column；Second chromatographic column is hollow capillary column.
Preferably, wherein the damper tube is needle-valve, and damping column is provided between the damper tube and the 8th opening.
Preferably, wherein first flame ionization ditector is also associated with the 4th flow controller and the 5th flow
Controller, second flame ionization ditector are also associated with the 6th flow controller and the 7th flow controller.
Preferably, wherein also including sampling pump, the sampling pump is connected by pipeline with the molecular sieve filter.
Compared with prior art, the utility model at least has advantages below：
NMHC gas analyzer provided by the utility model, it passes through blowback switching gas circuit cutting technique, profit
With a gas ten-way valve, make pre-cut and blowback post with the first chromatographic column, significantly reduce the pollution of the first chromatographic column, reduce
Interference of the upper sample gas residual to the measurement of next sample gas, when particularly separating the component of the big polarity of higher boiling, makes height boiling
Point material does not enter flame ionization ditector, effectively shortens the test period of methane/NMHC, improves sample
The accuracy and analysis efficiency of gas detection, extend the service life of the first chromatographic column；, will using hydrocarbon selective oxidation device
The hydrocarbon oxidation catalyst of all non-methane compositions in sample gas is oxidized to carbon dioxide and water, then passes through the second chromatographic column point
The impurity such as carbon dioxide and water are separated out, the amount for the methane being finally passed through in the second flame ionization ditector determination sample gas,
Realize single injected sampling while determine the function of methane and NMHC amount, save analysis procedure and improve analysis effect
Rate.NMHC gas analyzer provided by the utility model, that is, other gas componants in sample gas are avoided to first
The interference of alkane/NMHC measure, the analyzer is improved to the detectability of methane/NMHC and detects data
Accuracy, accuracy of detection can reach ppb ranks, the discharge of strict management and control contaminating enterprises, it is ensured that the strict improvement of atmosphere pollution.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Structure according to these accompanying drawings obtains other accompanying drawings.
Fig. 1 is the structural representation (ten of the detection state of NMHC gas analyzer provided by the utility model
Port valve is in OFF state)；
Fig. 2 is the structural representation (ten of the blowback state of NMHC gas analyzer provided by the utility model
Port valve is in ON states).
Wherein, the 101, first flame ionization ditector；102nd, the second flame ionization ditector；103rd, ten is logical
Valve；104th, damper tube；105th, quantitative loop；106th, the first chromatographic column；107th, the second chromatographic column；108th, triple valve；109th, hydro carbons selects
Selecting property device；110th, molecular sieve filter；111st, first flow controller；112nd, second flow controller；113rd, the 3rd flow
Controller；114th, sampling pump.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only the part of the embodiment of the present invention, rather than whole embodiments.
Based on the embodiment in the present invention, those of ordinary skill in the art are obtained under the premise of creative work is not made
The every other embodiment obtained, belongs to the scope of protection of the invention.
In the present invention such as relating to the description of " first ", " second " etc. is only used for describing purpose, and it is not intended that instruction
Or imply its relative importance or the implicit quantity for indicating indicated technical characteristic.Thus, " first ", " second " are defined
Feature can express or implicitly include at least one this feature.
As shown in figure 1, a kind of NMHC gas analyzer, including the first flame ionization ditector 101 and
Two flame ionization ditectors 102, in addition to ten-way valve 103, the ten-way valve 103 are provided with ten openings, and this ten openings are suitable
Hour hands number in order, the respectively first opening, the second opening, the 3rd opening, the 4th opening, the 5th opening, the 6th opening, the
Seven openings, the 8th opening, the 9th opening and the tenth opening (ten-way valve disk mark 1~10), the first opening are entered for testing sample gas
Mouthful, the second opening exports for testing sample gas, and the 4th opening and the 7th opening are carrier gas inlet, and the 4th opening and the 3rd opening are logical
Piping connects, and the 8th opening is connected with damper tube 104, and the 3rd, which is open between the tenth opening, is provided with quantitative loop 105, and the 5th
The first chromatographic column 106 is provided between opening and the 9th opening, the 6th opening is connected with triple valve 108, and the one of the triple valve 108
End is connected with the first flame ionization ditector 101, and the other end is connected with hydrocarbon selective oxidation device 109, second in turn
The flame ionization ditector 102 of chromatographic column 107 and second, the first flame ionization ditector 101 and the second hydrogen flame from
Sonization detector 102 is connected with terminal device.
Wherein also include molecular sieve filter 110 and first flow controller 111, molecular sieve filter 110 with it is first-class
Amount controller 111 is by pipeline communication, and the inlet end that first flow controller 111 and first is open is led to by pipeline communication
Cross to sampling gas filtered and flow control, further increase detection data precision and flame ionization ditector
Analysis efficiency.
Wherein also include the flow controller 113 of second flow controller 112 and the 3rd, second flow controller 112 and
The inlet end of four openings is connected by pipeline, and the 3rd flow controller 113 is connected with the inlet end of the 7th opening by pipeline, is led to
Cross the flow for being passed through carrier gas is controlled, further increase the precision and flame ionization ditector of detection data
Analysis efficiency.
Wherein the first chromatographic column 106 is polarity capillary column, and the polarity capillary column is alundum (Al2O3) capillary column or divided
Son sieve capillary column；Second chromatographic column 107 is hollow capillary column.Relative to using for packed column, when the first chromatographic column 106 and the
When two chromatographic columns 107 are capillary column, required carrier gas dosage is smaller during detection, and chromatogram peak out out is sharper, avoids
Conditions of streaking, improve sample qi leel from accuracy.
Wherein, damper tube 104 is needle-valve, and is provided with damping column between the opening of damper tube 104 and the 8th and (does not show in figure
Go out), the setting is mainly when ten-way valve carries out state switching, and the fluid flow in pipeline can be undergone mutation, and damping column is used
Caused fluid flow mutation, prevents the first flame ionization ditector 101 when the ten-way valve state switching is buffered
Or the detector of the second flame ionization ditector 102 stops working.
Wherein the first flame ionization ditector 101 is also associated with the 4th flow controller and the 5th flow controller,
Second flame ionization ditector 102 is also associated with the 6th flow controller and the 7th flow controller (not shown)；
The first flame ionization ditector 101 and the second flame ionization ditector 102 are adjusted by adjusting flow controller
Separation and the flow for needing to select carrier gas of analyze speed, selecting the flow of hydrogen makes hydrogen flowing quantity and nitrogen flow ratio be 1:1
To 1:1.4, in optimal hydrogen, nitrogen flow-rate ratio, the high sensitivity of flame ionization ditector, stability is good；Work as air mass flow
During very little, the sensitivity of flame ionization ditector is relatively low, with the raising of air mass flow, flame ionization ditector
After sensitivity improves, but air mass flow is higher than a certain numerical value, the flow of air is improved to the sensitive of flame ionization ditector
Degree has had not significant impact.
Wherein also include sampling pump 114, sampling pump 114 is connected by pipeline with molecular sieve filter 110, sampling pump 114
Setting, improve for the automation of NMHC gas analyzer provided by the utility model and provide technical support,
Improve its analysis efficiency.
Referring again to Fig. 1, NMHC gas analyzer provided by the utility model, its operation principle is：Utilize
The gas chromatographic analysis that the utility model carries out trace methane and NMHC in sample gas is, according to cutting for ten-way valve 103
Change point sample introduction state and sampling state, during sample introduction, the second road-load gas enters the 4th opening, the 3rd opening by the second carrier gas pipe, pushes away
Sample gas in dynamic quantitative loop 104 is gone out in sample gas by the tenth opening, the 9th opening into 106 pre- sub-argument of the first chromatographic column
H2、O2、Ar、N2With the foreign gas such as CO, total appropriate hydrocarbon gas in sample gas takes the lead in being opened by the 5th after the separation of the first chromatographic column 106
Mouth, the 6th opening enter triple valve 108, are then switched to sampling state by ten-way valve 103, the second road-load gas is opened by the 4th
Mouth, the 5th opening are by remaining gas in the sample gas in the first chromatographic column 106 by the 9th opening, the 8th opening again through damper tube
104 emptying discharges；Pass through switching three-way valve 108 so that a part of sample gas by the first chromatographic column 106 enters the first hydrogen fire
Flame ionization detector 101, carry out the measure of total hydrocarbon amount；Another part sample gas first passes through selective oxidation device 109 by sample
The hydrocarbon oxidation catalyst of all non-methane compositions in product gas is oxidized to carbon dioxide and water, enters back into the second chromatographic column 107
Carbon dioxide and water are isolated, meanwhile, first via carrier gas enters the 7th opening by the first carrier gas pipe, the 6th opening is promoted through second
The methane that chromatographic column 107 is isolated enters the measure that the second flame ionization ditector 102 carries out methane content, by sample gas
Total hydrocarbon amount subtract the concentration value that methane content in sample gas is NMHC in sample gas, total hydrocarbon amount in gained sample gas,
The signal response of methane content and NMHC amount is shown on the terminal device.
As shown in Fig. 2 last, sample gas is open from ten-way valve 103 first, the tenth opening enters, and promotes in quantitative loop 105
Carrier gas from second opening discharge, sample gas fill up in quantitative loop 105 and the first chromatographic column 106 other compositions emptying after,
Sample introduction state is switched to again to be analyzed.
More than, the only preferable embodiment of the utility model, but the protection domain of utility model is not limited to
This, any one skilled in the art is in the technical scope that the utility model discloses, the change that can readily occur in
Or replace, it should all cover within the scope of protection of the utility model.Therefore, the scope of protection of the utility model should be with right
The protection domain of claim is defined.
Claims (7)
- A kind of 1. NMHC gas analyzer, it is characterised in that：Including the first flame ionization ditector and the second hydrogen Flame ionization detector, in addition to ten-way valve, the ten-way valve are provided with ten openings, respectively first is open, second is open, 3rd opening, the 4th opening, the 5th opening, the 6th opening, the 7th opening, the 8th opening, the 9th opening and the tenth opening, it is described First opening is testing sample gas import, and second opening exports for testing sample gas, the 4th opening and the described 7th It is open and is connected for carrier gas inlet, the 4th opening with the 3rd opening by pipeline, the 8th opening is connected with damper tube, institute State and quantitative loop is provided between the 3rd opening and the tenth opening, the first chromatogram is provided between the 5th opening and the 9th opening Post, the 6th opening are connected with triple valve, and one end of the triple valve is connected with the first flame ionization ditector, another End is connected with hydrocarbon selective oxidation device, the second chromatographic column and the second flame ionization ditector, first hydrogen in turn Flame ionization detector and the second flame ionization ditector are connected with terminal device.
- 2. NMHC gas analyzer according to claim 1, it is characterised in that also including molecular sieve filter and First flow controller, the molecular sieve filter and the first flow controller are and described first-class by pipeline communication Amount controller and the inlet end of the described first opening pass through pipeline communication.
- 3. NMHC gas analyzer according to claim 2, it is characterised in that also including second flow controller With the 3rd flow controller, the second flow controller is connected with the inlet end of the described 4th opening by pipeline, and described the Three flow controllers are connected with the inlet end of the described 7th opening by pipeline.
- 4. NMHC gas analyzer according to claim 3, it is characterised in that first chromatographic column is polarity Capillary column, the polarity capillary column are alundum (Al2O3) capillary column or molecular sieve capillary column；Second chromatographic column is hollow Capillary column.
- 5. NMHC gas analyzer according to claim 4, it is characterised in that the damper tube be needle-valve and in Damping column is provided between the damper tube and the 8th opening.
- 6. NMHC gas analyzer according to claim 5, it is characterised in that first hydrogen flameionization Detector is also associated with the 4th flow controller and the 5th flow controller, and second flame ionization ditector is also connected with There are the 6th flow controller and the 7th flow controller.
- 7. NMHC gas analyzer according to claim 6, it is characterised in that described to adopt also including sampling pump Sample pump is connected by pipeline with the molecular sieve filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720569997.1U CN206974972U (en) | 2017-05-22 | 2017-05-22 | A kind of NMHC gas analyzer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720569997.1U CN206974972U (en) | 2017-05-22 | 2017-05-22 | A kind of NMHC gas analyzer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206974972U true CN206974972U (en) | 2018-02-06 |
Family
ID=61410248
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720569997.1U Expired - Fee Related CN206974972U (en) | 2017-05-22 | 2017-05-22 | A kind of NMHC gas analyzer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206974972U (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108562696A (en) * | 2018-03-29 | 2018-09-21 | 北京新能联合仪器仪表厂 | A kind of hydrogen sulfide device for fast detecting |
| CN109270183A (en) * | 2018-12-03 | 2019-01-25 | 华电智控（北京）技术有限公司 | Gas-chromatography non-methane total hydrocarbons detection device |
| CN109580839A (en) * | 2019-01-12 | 2019-04-05 | 上海凡伟仪器设备有限公司 | A kind of analytical equipment and analysis method for non-methane total hydrocarbons in VOC |
| CN109870532A (en) * | 2019-03-13 | 2019-06-11 | 翼捷安全设备（昆山）有限公司 | Online non-methane total hydrocarbons analysis system |
| CN109884229A (en) * | 2019-04-09 | 2019-06-14 | 重庆市计量质量检测研究院 | Impurity composition chromatographic analysis device and its detection method in food-grade carbon-dioxide |
| CN110208208A (en) * | 2018-02-28 | 2019-09-06 | 总翔企业股份有限公司 | Water sample analysis equipment |
| CN110514755A (en) * | 2019-08-16 | 2019-11-29 | 国家能源集团宁夏煤业有限责任公司 | The method of chromatographic detection apparatus and detection organic sulfur |
| CN114235941A (en) * | 2022-02-28 | 2022-03-25 | 华电智控（北京）技术有限公司 | Direct detection device and method for non-methane total hydrocarbons in ambient air |
| CN115326966A (en) * | 2022-08-16 | 2022-11-11 | 青岛明华电子仪器有限公司 | Device for detecting non-methane total hydrocarbon and benzene series in methane |
-
2017
- 2017-05-22 CN CN201720569997.1U patent/CN206974972U/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110208208A (en) * | 2018-02-28 | 2019-09-06 | 总翔企业股份有限公司 | Water sample analysis equipment |
| CN108562696A (en) * | 2018-03-29 | 2018-09-21 | 北京新能联合仪器仪表厂 | A kind of hydrogen sulfide device for fast detecting |
| CN109270183A (en) * | 2018-12-03 | 2019-01-25 | 华电智控（北京）技术有限公司 | Gas-chromatography non-methane total hydrocarbons detection device |
| CN109580839A (en) * | 2019-01-12 | 2019-04-05 | 上海凡伟仪器设备有限公司 | A kind of analytical equipment and analysis method for non-methane total hydrocarbons in VOC |
| CN109870532A (en) * | 2019-03-13 | 2019-06-11 | 翼捷安全设备（昆山）有限公司 | Online non-methane total hydrocarbons analysis system |
| CN109884229A (en) * | 2019-04-09 | 2019-06-14 | 重庆市计量质量检测研究院 | Impurity composition chromatographic analysis device and its detection method in food-grade carbon-dioxide |
| CN109884229B (en) * | 2019-04-09 | 2023-12-15 | 重庆市计量质量检测研究院 | Chromatographic analysis device for impurity components in food-grade carbon dioxide and detection method thereof |
| CN110514755A (en) * | 2019-08-16 | 2019-11-29 | 国家能源集团宁夏煤业有限责任公司 | The method of chromatographic detection apparatus and detection organic sulfur |
| CN110514755B (en) * | 2019-08-16 | 2022-03-22 | 国家能源集团宁夏煤业有限责任公司 | Chromatographic detection device and method for detecting organic sulfur |
| CN114235941A (en) * | 2022-02-28 | 2022-03-25 | 华电智控（北京）技术有限公司 | Direct detection device and method for non-methane total hydrocarbons in ambient air |
| CN115326966A (en) * | 2022-08-16 | 2022-11-11 | 青岛明华电子仪器有限公司 | Device for detecting non-methane total hydrocarbon and benzene series in methane |
| CN115326966B (en) * | 2022-08-16 | 2024-02-06 | 青岛明华电子仪器有限公司 | Methane non-methane total hydrocarbon and benzene series thing detection device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN206974972U (en) | A kind of NMHC gas analyzer | |
| CN207300999U (en) | A kind of volatile organic compounds analytical equipment | |
| CN101368921B (en) | High sensitivity and high-selective gas transducer | |
| CN206974973U (en) | A kind of methane monitors analyzer on-line | |
| CN202814873U (en) | Detector for volatile sulphides in surface seawater and atmosphere | |
| CN106053652A (en) | Method and device for monitoring methane or non-methane hydrocarbon | |
| CN106918526A (en) | The quick method for determining petroleum vapor recovery sorbing material adsorption desorption performance | |
| CN202676680U (en) | Device capable of detecting low-concentration freon in seawater | |
| Zamorska-Wojdyła et al. | Quality evaluation of biogas and selected methods of its analysis | |
| CN106338554A (en) | Method for determining salt spray concentration | |
| CN110514755B (en) | Chromatographic detection device and method for detecting organic sulfur | |
| CN110412190A (en) | The analysis system and its analysis method of methane and non-methane total hydrocarbons | |
| CN106771299A (en) | Determine the gas sample injection device and its application system of stationary source total organic carbon | |
| CN204514858U (en) | A kind of NMHC gas detecting instrument | |
| CN101275931A (en) | Method for detecting trace quantity SOX in hydrogen using adsorption concentrating | |
| CN105136917A (en) | Qualitative and quantitative analytic method of multiple sulfides in transformer oil | |
| CN102288660A (en) | Combined detection method and device for detecting trace moisture and trace oxygen of industrial gas | |
| CN102221530A (en) | Method for automatically analyzing sulfide in water sample | |
| CN203941100U (en) | Gas phase molecular absorption spectrometer with carrier gas purification plant | |
| CN109870532A (en) | Online non-methane total hydrocarbons analysis system | |
| Marzouk et al. | Analyzer for continuous monitoring of H2S in gas streams based on a novel thermometric detection | |
| CN204330692U (en) | Based on the on-line monitoring device of integrated photovoltaic substation transformer | |
| CN202057604U (en) | On-line monitoring device for total arsenic in water | |
| CN204462090U (en) | Oil component automatic separation equipment | |
| CN109207354B (en) | Microorganism fermentation gas production potential testing device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180206 Termination date: 20200522 |