CN220671351U - Non-methane total hydrocarbon gas chromatography direct measurement device - Google Patents
Non-methane total hydrocarbon gas chromatography direct measurement device Download PDFInfo
- Publication number
- CN220671351U CN220671351U CN202322024466.2U CN202322024466U CN220671351U CN 220671351 U CN220671351 U CN 220671351U CN 202322024466 U CN202322024466 U CN 202322024466U CN 220671351 U CN220671351 U CN 220671351U
- Authority
- CN
- China
- Prior art keywords
- port
- enrichment
- valve
- sample
- way electromagnetic
- 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.)
- Active
Links
- 229930195733 hydrocarbon Natural products 0.000 title claims abstract description 47
- 150000002430 hydrocarbons Chemical class 0.000 title claims abstract description 47
- 239000004215 Carbon black (E152) Substances 0.000 title claims abstract description 39
- 238000005259 measurement Methods 0.000 title claims abstract description 17
- 238000004817 gas chromatography Methods 0.000 title claims abstract description 16
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 108
- 238000002347 injection Methods 0.000 claims abstract description 47
- 239000007924 injection Substances 0.000 claims abstract description 47
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 34
- 238000005070 sampling Methods 0.000 claims abstract description 16
- 239000007789 gas Substances 0.000 claims description 40
- 238000004458 analytical method Methods 0.000 claims description 23
- 239000012159 carrier gas Substances 0.000 claims description 19
- 239000003223 protective agent Substances 0.000 claims description 13
- 239000001257 hydrogen Substances 0.000 claims description 5
- 229910052739 hydrogen Inorganic materials 0.000 claims description 5
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 4
- 238000001514 detection method Methods 0.000 abstract description 12
- 238000012544 monitoring process Methods 0.000 abstract description 3
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 239000003570 air Substances 0.000 description 26
- 239000012855 volatile organic compound Substances 0.000 description 5
- 239000012080 ambient air Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 238000010926 purge Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004587 chromatography analysis Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000004440 column chromatography Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000011814 protection agent Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
Landscapes
- Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
Abstract
The utility model relates to the field of environmental monitoring, in particular to a non-methane total hydrocarbon gas chromatography direct measurement device. The device comprises a six-way sample injection valve and an enrichment pipe, wherein the enrichment pipe is filled with an enrichment agent, and a first port of the sample injection valve is connected with a filter; the second port of the sample injection valve is connected with the first port of the three-way electromagnetic valve I, the second port of the three-way electromagnetic valve I is connected with the first EPC, and the third port of the three-way electromagnetic valve I is connected with the sampling pump; the sixth port and the third port of the sample injection valve are respectively connected with two ends of the enrichment tube; the fourth port of the sample injection valve is connected with the second EPC; the fifth port of the sample injection valve is connected with the first port of the three-way electromagnetic valve II, the second port of the three-way electromagnetic valve II is connected with the third EPC, the third port of the three-way electromagnetic valve II is connected with the FID detector, and the fourth EPC is connected with the FID detector. The device has a simple structure, improves the detection accuracy of non-methane totality, and reduces the detection limit index.
Description
Technical Field
The utility model relates to the field of environmental monitoring, in particular to a non-methane total hydrocarbon gas chromatography direct measurement device.
Background
The existing non-methane total hydrocarbon analyzer generally separates total hydrocarbon from methane by utilizing a chromatographic column chromatography separation principle, and the total hydrocarbon and methane leave the chromatographic column in time sequence to enter an FID hydrogen flame detector to measure a current signal to obtain a peak diagram, so that the concentration of VOC pollutants of the non-methane total hydrocarbon is obtained through calculation, and the purpose of detection and analysis is achieved. The sample injection stage of the chromatography in the process is realized by switching a multi-way sample injection valve.
The existing common non-methane total hydrocarbon analyzer or ambient air VOC analyzer of gas chromatography adopts a back-blowing difference reduction method, 1-2 ten-way valves are used, a quantitative ring and a chromatographic column are combined to complete the sample injection and separation of methane and total hydrocarbon, a methane chromatographic peak and a total hydrocarbon chromatographic peak are respectively obtained, and the thought of non-methane total hydrocarbon concentration is calculated. In practical application, the following problems exist:
(1) The device is complex: one set of instrument is usually matched with a plurality of quantitative rings, a plurality of sample injection valves and a plurality of EPC controls, so that the cost and the complexity control degree of the device are increased;
(2) The detection limit is high: the chromatographic peaks of the total hydrocarbon and the methane are obtained through separation, and then the non-methane total hydrocarbon is calculated, so that the accumulated error is larger, the data detection limit is high, and particularly, the monitoring of the VOCs with low concentration in the ambient air is realized;
(3) The residue of non-methane total hydrocarbon in the sample injection valve of the methane path can directly influence the detection and analysis of the next round of samples, but no back-blowing gas path is arranged in the sample pipeline of the existing analyzer for detecting the ambient air VOC or the low concentration VOC, thereby directly influencing the detection precision of the next round.
Disclosure of Invention
The utility model aims to overcome the defects in the prior art, and provides a non-methane total hydrocarbon gas chromatography direct measurement device which is simple in structure, improves the detection accuracy of non-methane total, and reduces the detection limit index.
The technical scheme of the utility model is as follows: the non-methane total hydrocarbon gas chromatographic direct measurement device includes six-way sample valve and enriching pipe, the enriching pipe contains enriching agent,
the first port of the sample injection valve is connected with the filter;
the second port of the sample injection valve is connected with the first port of the three-way electromagnetic valve I, the second port of the three-way electromagnetic valve I is connected with the first EPC, and the third port of the three-way electromagnetic valve I is connected with the sampling pump;
the sixth port and the third port of the sample injection valve are respectively connected with two ends of the enrichment tube;
the fourth port of the sample injection valve is connected with the second EPC;
the fifth port of the sample injection valve is connected with the first port of the three-way electromagnetic valve II, the second port of the three-way electromagnetic valve II is connected with the third EPC, the third port of the three-way electromagnetic valve II is connected with the FID detector, and the fourth EPC is connected with the FID detector.
In the utility model, the enrichment pipe adopts a multi-section enrichment agent, which comprises three sections of enrichment agents and one section of protective agent, wherein the enrichment agent is positioned at one side of the enrichment pipe, and the protective agent is positioned at the other side of the enrichment pipe;
the enrichment pipe is placed in the cold well module, the temperature of the enrichment pipe is controlled through the cold well module, and when the enrichment pipe is in a low-temperature or normal-temperature environment, the enrichment pipe is in an enrichment state; when the enrichment tube is in a high temperature environment, the enrichment tube is in an analysis state.
When the enrichment pipe is in an enrichment state, gas flows in from one end of the enrichment pipe filled with the enrichment agent and flows out from one end filled with the protective agent;
when the enrichment tube is in an analysis state, gas flows in from the end of the enrichment tube containing the protective agent and flows out from the end containing the enrichment agent.
When the enrichment pipe is in an enrichment state, the whole device is in an enrichment state;
when the enrichment tube is in the analysis state, the whole device is in the analysis state.
When the device is in an enrichment state, the first port and the sixth port of the sample injection valve are connected, the second port and the third port of the sample injection valve are connected, at the moment, a connecting pipeline between the three-way electromagnetic valve I and the first EPC is in a cut-off state,
the sample gas enters the sample valve through the filter, flows into the enrichment pipe sequentially through a first port and a sixth port of the sample valve, the enrichment agent in the enrichment pipe adsorbs non-methane total hydrocarbons in the sample gas, methane gas which is not adsorbed flows out of the enrichment pipe, flows into the three-way electromagnetic valve I sequentially through a third port and a second port of the sample valve, and the methane gas flows out through the sampling pump;
the carrier gas flows into the sample valve through the second EPC, and flows into the F ID detector through the fourth port, the fifth port and the three-way electromagnetic valve II of the sample valve in sequence.
When the device is in an analysis state, the fifth port and the sixth port of the sample injection valve are connected, the third port and the fourth port of the sample injection valve are connected, and a connecting pipeline between the three-way electromagnetic valve I and the sampling pump is in a cut-off state.
After entering the sample injection valve through the first EPC and the three-way electromagnetic valve I, the carrier gas flows out to the filter through the second port and the first port of the sample injection valve in sequence;
the other part of carrier gas flows into the sample valve through the second EPC, flows into the enrichment pipe through the fourth port and the third port of the sample valve in sequence, and at the moment, the enrichment pipe is in a state of high Wen Jiexi, the non-methane total hydrocarbon in the enrichment agent is desorbed, and the non-methane total hydrocarbon flows into the F ID detector along with the carrier gas through the sixth port, the fifth port and the three-way electromagnetic valve II of the sample valve in sequence.
The hydrogen sequentially flows into the F ID detector through a third EPC and a three-way electromagnetic valve II;
the air flows into the F ID detector through the fourth EPC.
The beneficial effects of the utility model are as follows:
(1) The device only comprises a six-way sample injection valve and a rich pipe, the flow of carrier gas in each gas path is controlled through the EPC, a chromatographic peak can be obtained, the concentration of non-methane total hydrocarbon is obtained through direct test, a quantitative ring and a chromatographic column are not required to be arranged, and the structure and the internal gas path of the whole device are simple;
(2) The sampling gas circuit is purged, so that the residual interference of the next round of sample testing is reduced, the detection accuracy is improved, and the detection limit index is reduced;
(3) The enriching agent in the enriching pipe adopts sectional type, thereby ensuring the enriching efficiency.
Drawings
FIG. 1 is a schematic diagram of the connection structure of the device in an enriched state;
fig. 2 is a schematic view of the connection structure of the device in an analysis state.
In the figure: 1, a filter; 2 a rich pipe; 3, a three-way electromagnetic valve I; 4, a sampling pump; 5 a first EPC;6 three-way electromagnetic valve II; a 7FID detector; 8, a sample injection valve; 9 a second EPC;10 a third EPC;11 fourth EPC.
Detailed Description
In order that the above-recited objects, features and advantages of the present utility model will become more readily apparent, a more particular description of the utility model will be rendered by reference to the appended drawings.
In the following description, specific details are set forth in order to provide a thorough understanding of the present utility model. The present utility model may be embodied in many other forms than those herein described, and those skilled in the art may readily devise numerous other arrangements that do not depart from the spirit of the utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed below.
As shown in fig. 1 and fig. 2, the non-methane total hydrocarbon gas chromatography direct measurement device of the utility model comprises a sample injection valve 8, a plurality of electronic pressure controllers (Electronic Pressure Control, EPC for short) and an enrichment tube 2. The sample injection valve 8 in the application is a six-way sample injection valve and comprises six ports, and the continuous repeated conversion of the whole device between two working states, namely an enrichment state and an analysis state is realized through the connection between two adjacent ports in the six ports, the connection between the ports and the enrichment tube 2 and the like.
In this embodiment, in order to facilitate description of the structure of the whole device, the serial numbers of the ports of the sample injection valve 8 are named. It should be noted that the port of the sample valve is named by serial number, only for convenience in describing the connection relationship between the sample valve and other components, and not for specific limitation of the structure of the sample valve. The six ports of the sample valve 8 are named first to sixth ports, respectively.
In this application, both ends of the enrichment tube 2 are connected to the third port and the sixth port of the sample injection valve 8, respectively. The enriching tube 2 is internally provided with an enriching agent and a protective agent. In this embodiment, the enriching agent in the enriching tube adopts a sectional type, that is, the enriching tube 2 is provided with three sections of enriching agents and one section of protecting agent, wherein the three sections of enriching agents are in adjacent states, and the protecting agent is located at one end of the enriching tube 2. By using a segmented concentration agent, the concentration efficiency can be ensured. The rich pipe 2 in this embodiment is provided in a cold well module. In this embodiment, one end of the enrichment tube 2 provided with the enrichment agent is connected to the sixth port of the sample valve 8, and one end of the enrichment tube 2 provided with the protection agent is connected to the third port of the sample valve 8.
At low temperature or normal temperature, the enrichment pipe is in an enrichment state, the sample gas flows in from one end of the enrichment agent and flows out from one end of the protective agent, the enrichment agent adsorbs non-methane total hydrocarbons in the sample gas, and methane gas which is not absorbed by the enrichment agent flows out. When the high-temperature analysis state is reached, the enrichment tube is in an analysis state, at the moment, the sample gas flows in from one end of the protective agent and flows out from one end of the enrichment agent, and at the moment, the enrichment agent desorbs the non-methane total hydrocarbon. The cold well module changes the ambient temperature of the enrichment pipe 2 and provides a temperature condition for the enrichment agent in the enrichment pipe 2 to realize the adsorption and desorption of the non-methane total hydrocarbon.
A first port of the sample valve 8 is connected to the filter 1. The fourth port of the sample valve 8 is connected to the second EPC 9.
The second port of the sample injection valve is connected with the first port of the three-way electromagnetic valve I3, the second port of the three-way electromagnetic valve I3 is connected with the sampling pump 4, and the third port of the three-way electromagnetic valve I3 is connected with the first EPC 5.
The fifth port of the sample injection valve 8 is connected with the first port of the three-way electromagnetic valve II 6. A second port of the three-way solenoid valve ii 6 is connected to the third EPC 10. The third port of the three-way electromagnetic valve II 6 is connected with the FID detector 7. The FID detector 7 is connected to a fourth EPC 11.
Through the connection relationship, five air paths are formed in the device, and in this embodiment, the five air paths are positioned as a first air path to a fifth air path.
In this application, a first air path is arranged in the sample injection valve 8. A second air path is formed among the filter 1, the enrichment tube 2, the three-way electromagnetic valve I3, the sampling pump 4 and the first EPC 5. A third air path is formed among the second EPC9, the three-way electromagnetic valve II 6 and the FID detector 7. A fourth air path is formed among the third EPC10, the three-way electromagnetic valve II 6 and the FID detector 7. A fifth air path is formed among the fourth EPC11, the three-way electromagnetic valve II 6 and the FID detector 7.
When the first port of the sample valve 8 is connected to the sixth port and the second port is connected to the third port, the device is in an enriched state. When the sixth port of the sample valve 8 is connected to the fifth port and the third port is connected to the fourth port, the device is in an analysis state. The sample valve 8 is provided with a first gas path, and after the carrier gas enters the sample valve 8 through the first gas path, the connection relation between adjacent ports in the sample valve 8 can be driven to change, so that the sample valve 8 is switched between an enrichment state and an analysis state.
When the device is in an enriched state, the sample gas enters the enrichment tube 2 through the second gas path. The sample gas flows into the sample valve 8 from the filter 1, flows into the enrichment pipe 2 through the first port and the sixth port of the sample valve 8 in sequence, and the enrichment pipe 2 is in an enrichment state at low temperature or normal temperature at the moment, and the non-methane total hydrocarbons in the sample gas are adsorbed by the enriching agent in the enrichment pipe 2. Methane in the sample gas is not adsorbed, flows out of the enrichment pipe 2 along with the sample gas, and flows into the three-way electromagnetic valve I3 through the third port and the second port of the sample valve 8 in sequence. At this time, the connecting pipeline between the three-way electromagnetic valve I3 and the first EPC5 is in a cut-off state, so that the enriched gas can only be discharged into the air through the sampling pump 4.
The carrier gas enters the third gas path through the second EPC9, and flows into the three-way electromagnetic valve II 6 through the fourth port and the fifth port of the sample injection valve 8 in sequence, and is discharged through the FID detector 7 to purge the gas remained in the pipeline in the analysis state.
At the same time, air source H 2 Enters a fourth air path through the third EPC10, and then the air source H 2 Sequentially enters the FID detector 7 through the three-way electromagnetic valve II 6. The Air source Air enters the fifth Air channel through the fourth EPC11, enters the FID detector 7 and is discharged. Finally, the non-methane total hydrocarbons are burned in the FID detector 7 by the incoming hydrogen and air.
When the device is in an analysis state, the carrier gas passes through the second gas path into the enrichment tube 2. At this time, the carrier gas flows from the first EPC5 into the solenoid valve 8 through the three-way solenoid valve i 3, flows into the filter 1 through the second port and the first port of the solenoid valve 8 in order, and is discharged into the air through the filter 1. The carrier gas in the second gas path is used for cleaning the sample pipeline at this time, and the sample pipeline is purged in advance before the next round of samples enter the sample injection valve 8. At this time, the connecting pipeline between the three-way electromagnetic valve I3 and the sampling pump 4 is in a cut-off state.
The carrier gas is used for purging the sampling pipeline so as to reduce residual non-methane total hydrocarbon in the sampling pipeline of the previous round, and meanwhile, the sampling gas circuit is in a micro-positive pressure state, so that pollutants in the ambient air are prevented from entering, the precision of the sample gas of the next round is improved, the accuracy of an instrument is improved, and the detection limit of the instrument is reduced.
The carrier gas flows into the second EPC through the third gas circuit, and flows into the enrichment tube 2 through the fourth port and the third port of the sample valve 8 in sequence. At this time, the enrichment tube 2 is instantaneously heated, is in an analysis state under a high Wen Jiexi state, and the non-methane total hydrocarbon is desorbed from the enrichment agent, and sequentially passes through the three-way electromagnetic valve II 6 and the FID detector 7 along with the carrier gas, so that a chromatographic peak of the non-methane total hydrocarbon is obtained.
At the same time, air source H 2 Enters a fourth air path through the third EPC10, and then the air source H 2 Sequentially enters the FID detector 7 through the three-way electromagnetic valve II 6. The Air source Air enters the fifth Air channel through the fourth EPC11, enters the FID detector 7 and is discharged. Finally, the non-methane total hydrocarbons are burned in the FID detector 7 by the incoming hydrogen and air.
The device has the working principle that the connection relation of adjacent ports in the sample injection valve is changed under the driving of carrier gas in the third gas path, so that the whole device is switched between an enrichment state and an analysis state. When the device is in an enrichment state, the enrichment pipe 2 is in a low-temperature or normal-temperature state, and the non-methane total hydrocarbons in the sample gas are adsorbed by the enrichment agent in the enrichment pipe. When the device is in the analysis state, the enrichment tube 2 is in a high Wen Jiexi state, and the non-methane total hydrocarbons in the enrichment agent are desorbed and flow into the FID detector 7 together with the carrier gas, so that the chromatographic peak of the non-methane total hydrocarbons is obtained.
The non-methane total hydrocarbon gas chromatography direct measurement device provided by the utility model is described in detail above. The principles and embodiments of the present utility model have been described herein with reference to specific examples, the description of which is intended only to facilitate an understanding of the method of the present utility model and its core ideas. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the utility model can be made without departing from the principles of the utility model and these modifications and adaptations are intended to be within the scope of the utility model as defined in the following claims. The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present utility model is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. The non-methane total hydrocarbon gas chromatographic direct measurement device comprises a six-way sample injection valve and an enrichment pipe, wherein the enrichment pipe is filled with an enrichment agent,
the first port of the sample injection valve is connected with the filter;
the second port of the sample injection valve is connected with the first port of the three-way electromagnetic valve I, the second port of the three-way electromagnetic valve I is connected with the first EPC, and the third port of the three-way electromagnetic valve I is connected with the sampling pump;
the sixth port and the third port of the sample injection valve are respectively connected with two ends of the enrichment tube;
the fourth port of the sample injection valve is connected with the second EPC;
the fifth port of the sample injection valve is connected with the first port of the three-way electromagnetic valve II, the second port of the three-way electromagnetic valve II is connected with the third EPC, the third port of the three-way electromagnetic valve II is connected with the FID detector, and the fourth EPC is connected with the FID detector.
2. The non-methane total hydrocarbon gas chromatography direct measurement device according to claim 1, wherein,
the enrichment pipe is internally provided with a multi-section enrichment agent, and comprises three sections of enrichment agents and one section of protective agent, wherein the enrichment agent is positioned on one side of the enrichment pipe, and the protective agent is positioned on the other side of the enrichment pipe;
the enrichment pipe is placed in the cold well module, the temperature of the enrichment pipe is controlled through the cold well module, and when the enrichment pipe is in a low-temperature or normal-temperature environment, the enrichment pipe is in an enrichment state; when the enrichment tube is in a high temperature environment, the enrichment tube is in an analysis state.
3. The non-methane total hydrocarbon gas chromatography direct measurement device according to claim 2, wherein,
when the enrichment pipe is in an enrichment state, gas flows in from one end of the enrichment pipe filled with the enrichment agent and flows out from one end filled with the protective agent;
when the enrichment tube is in an analysis state, gas flows in from the end of the enrichment tube containing the protective agent and flows out from the end containing the enrichment agent.
4. The non-methane total hydrocarbon gas chromatography direct measurement device according to claim 2, wherein,
when the enrichment pipe is in an enrichment state, the whole device is in an enrichment state;
when the enrichment tube is in the analysis state, the whole device is in the analysis state.
5. The non-methane total hydrocarbon gas chromatography direct measurement device according to claim 4, wherein,
when the device is in an enrichment state, the first port and the sixth port of the sample injection valve are connected, the second port and the third port of the sample injection valve are connected, and at the moment, a connecting pipeline between the three-way electromagnetic valve I and the first EPC is in a cut-off state.
6. The direct measurement device for non-methane total hydrocarbon gas chromatography according to claim 5, wherein,
the sample gas enters the sample valve through the filter, flows into the enrichment pipe sequentially through a first port and a sixth port of the sample valve, the enrichment agent in the enrichment pipe adsorbs non-methane total hydrocarbon in the sample gas, methane gas which is not adsorbed flows out of the enrichment pipe, flows into the three-way electromagnetic valve I sequentially through a third port and a second port of the sample valve, and the methane gas flows out through the sampling pump;
the carrier gas flows into the sample valve through the second EPC, and flows into the FID detector through the fourth port, the fifth port and the three-way electromagnetic valve II of the sample valve in sequence.
7. The non-methane total hydrocarbon gas chromatography direct measurement device according to claim 4, wherein,
when the device is in an analysis state, the fifth port and the sixth port of the sample injection valve are connected, the third port and the fourth port of the sample injection valve are connected, and a connecting pipeline between the three-way electromagnetic valve I and the sampling pump is in a cut-off state.
8. The non-methane total hydrocarbon gas chromatography direct measurement device according to claim 7, wherein,
after entering the sample injection valve through the first EPC and the three-way electromagnetic valve I, the carrier gas flows out to the filter through the second port and the first port of the sample injection valve in sequence;
the other part of carrier gas flows into the sample valve through the second EPC, flows into the enrichment pipe through the fourth port and the third port of the sample valve in sequence, and at the moment, the enrichment pipe is in a state of high Wen Jiexi, the non-methane total hydrocarbon in the enrichment agent is desorbed, and the non-methane total hydrocarbon flows into the F ID detector along with the carrier gas through the sixth port, the fifth port and the three-way electromagnetic valve II of the sample valve in sequence.
9. The non-methane total hydrocarbon gas chromatography direct measurement device according to claim 1, wherein,
hydrogen flows into the FID detector through the third EPC and the three-way electromagnetic valve II in sequence;
air flows into the FID detector through the fourth EPC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322024466.2U CN220671351U (en) | 2023-07-31 | 2023-07-31 | Non-methane total hydrocarbon gas chromatography direct measurement device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322024466.2U CN220671351U (en) | 2023-07-31 | 2023-07-31 | Non-methane total hydrocarbon gas chromatography direct measurement device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220671351U true CN220671351U (en) | 2024-03-26 |
Family
ID=90333313
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322024466.2U Active CN220671351U (en) | 2023-07-31 | 2023-07-31 | Non-methane total hydrocarbon gas chromatography direct measurement device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220671351U (en) |
-
2023
- 2023-07-31 CN CN202322024466.2U patent/CN220671351U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104280492A (en) | Elemental analyzer for testing organic carbon and nitrogen in soil and plants | |
| CN210427492U (en) | Novel methane non-methane total hydrocarbon flow architecture | |
| CN103134875A (en) | On-line pretreatment device of aquatic volatile organic compounds | |
| CN113155988A (en) | Non-methane total hydrocarbon detection system and method based on single valve | |
| CN113624895A (en) | Direct measurement device and method for methane and non-methane total hydrocarbons | |
| CN107643352A (en) | NMHC detection means and method | |
| CN220671351U (en) | Non-methane total hydrocarbon gas chromatography direct measurement device | |
| CN112986442B (en) | Oil-gas integrated detection gas chromatograph for high-voltage electrical equipment | |
| CN213903428U (en) | Non-methane total hydrocarbon analysis device | |
| CN103954715B (en) | Gas chromatograph for refinery gas analysis | |
| CN209894763U (en) | Detection apparatus for non-methane total hydrocarbon | |
| CN218524650U (en) | Device for continuously monitoring non-methane total hydrocarbon and benzene series in ambient air | |
| CN201130172Y (en) | Thermal desorption instrument gasometry flow circuit apparatus | |
| CN201177622Y (en) | Gas-chromatography analyzer | |
| CN210269742U (en) | Be used for transformer trouble gas chromatogram detection device | |
| CN212180697U (en) | Online analysis device for mixed gas | |
| CN213875557U (en) | Benzene series fourteen-way valve gas circuit system | |
| CN2620277Y (en) | Gas flow circuit device for heat desorption apparatus | |
| CN214895052U (en) | Real-time detection device for methane and non-methane total hydrocarbons | |
| CN212568651U (en) | Non-methane total hydrocarbon detection device | |
| CN208399448U (en) | A kind of autosampler of carry sample store function | |
| CN210604531U (en) | Single-detector single-ten-way valve non-methyl total hydrocarbon benzene series online chromatograph | |
| CN112816644A (en) | Device and method for detecting VOCs in water | |
| CN113740469A (en) | Analysis method and analysis system for hydrogen component content of fuel | |
| CN113791133A (en) | Direct measurement method and detection system for non-methane total hydrocarbons |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |