CN214278048U - double-FID detection device for analyzing methane and non-methane total hydrocarbons - Google Patents
double-FID detection device for analyzing methane and non-methane total hydrocarbons Download PDFInfo
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- CN214278048U CN214278048U CN202023104962.1U CN202023104962U CN214278048U CN 214278048 U CN214278048 U CN 214278048U CN 202023104962 U CN202023104962 U CN 202023104962U CN 214278048 U CN214278048 U CN 214278048U
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Abstract
The utility model discloses a two FID detection device that are used for methane and non-methane total hydrocarbon to analyze, including trunk line, first pipeline, second pipeline, first FID detector and second FID detector, first pipeline one end is connected with first FID detector, the first pipeline other end communicates with the trunk line; one end of the second pipeline is connected with the second FID detector, the other end of the second pipeline is communicated with the main pipeline, and flow control components are arranged on the first pipeline and the second pipeline; a catalytic furnace is arranged on the second pipeline; and the main pipeline is provided with a gas path control assembly. The utility model discloses can real-time supervision methane and non-methane total hydrocarbon, have advantages such as detection speed is fast, the detection precision is high.
Description
Technical Field
The utility model relates to a gaseous detection technology field of volatile organic compound refers in particular to a two FID detection device that are used for methane and non-methane total hydrocarbon analysis.
Background
Non-methane hydrocarbons (NMHC) generally refer to all volatile hydrocarbons other than methane, also known as non-methane total hydrocarbons. The NMHC in the atmosphere exceeds a certain concentration, is directly harmful to human health, can generate photochemical reaction under certain conditions through sunlight irradiation to generate substances such as ozone and the like, is a leading factor of haze and PM2.5, and is harmful to the environment and human beings, so that the concentration of non-methane hydrocarbon needs to be monitored and analyzed.
In the prior art, the analysis of methane/non-methane total hydrocarbons is to collect and control sample gas through a quantitative ring and a six-way valve, methane firstly enters an FID (flame ionization detector) for detection through a chromatographic column, then the non-methane gas is blown back from the chromatographic column through back blowing of the chromatographic column, and the non-methane gas enters the FID again through reversing of the six-way valve for detection of the non-methane total hydrocarbons. In the prior art, the analysis of methane/non-methane total hydrocarbons needs to collect gas through a quantitative ring, so the scheme cannot realize the real-time monitoring of the sample gas, and the gas pressure has a crucial influence on the quality of a chromatogram for realizing the real-time monitoring of the sample gas. In the control of the gas circuit, the gas pressure fluctuation caused by pumping the gas through the pump is extremely unstable, and the deviation of the detection result is extremely large.
SUMMERY OF THE UTILITY MODEL
To the technical problem that prior art exists, the utility model provides a can real-time supervision methane and total hydrocarbon of non-methane, detect fast, detect the high two FID detection device that are used for methane and the analysis of the total hydrocarbon of non-methane of precision.
In order to solve the technical problem, the utility model discloses a following technical scheme:
a double FID detection device for analyzing methane and non-methane total hydrocarbons comprises a main pipeline, a first pipeline, a second pipeline, a first FID detector and a second FID detector, wherein one end of the first pipeline is connected with the first FID detector, and the other end of the first pipeline is communicated with the main pipeline; one end of the second pipeline is connected with the second FID detector, the other end of the second pipeline is communicated with the main pipeline, and flow control components are arranged on the first pipeline and the second pipeline; a catalytic furnace is arranged on the second pipeline; and the main pipeline is provided with a gas path control assembly.
As a further improvement of the utility model: the gas circuit control assembly comprises a pressure sensor and a proportional valve.
As a further improvement of the utility model: the gas circuit control assembly comprises a flow sensor and a proportional valve.
As a further improvement of the utility model: the flow control assembly includes an air resistor, a pressure sensor, and a proportional valve.
As a further improvement of the utility model: the flow control assembly includes a flow sensor and a proportional valve.
As a further improvement of the utility model: and a pump body is arranged at the main pipeline close to the air inlet end.
As a further improvement of the utility model: and a filter is also arranged between the air inlet end of the main pipeline and the pump body.
As a further improvement of the utility model: the device also comprises a control mechanism, wherein the control mechanism is used for controlling the flow control assembly and the gas circuit control assembly.
Compared with the prior art, the utility model has the advantages of:
the utility model discloses a two FID detection device for methane and total hydrocarbon analysis of non-methane adopts two FIDs, can carry out real-time analysis to methane and total hydrocarbon of non-methane simultaneously. Through gas circuit control assembly and flow control assembly, can realize the intelligent steady voltage of pipeline, make the appearance gas concentration in the pipeline can reach unanimity with environmental concentration fast, greatly shortened detection cycle. The gas path is divided into two branches, one branch enters the FID through the flow control assembly of the first pipeline for total hydrocarbon analysis, the other branch enters the FID through the second pipeline for non-methane hydrocarbon reaction through the catalytic furnace, the remaining methane enters the FID through the flow control assembly for quantitative analysis, and then the system calculates to obtain the content of the non-methane total hydrocarbon. The utility model discloses can realize methane and the total hydrocarbon real-time monitoring of non-methane, result output speed reaches the second level.
Drawings
Fig. 1 is a schematic diagram of the present invention.
Illustration of the drawings:
1. a main pipeline; 2. a first conduit; 3. a second conduit; 4. a first FID detector; 5. a second FID detector; 6. a flow control assembly; 7. a catalytic furnace; 8. a gas path control assembly; 9. a pump body; 10. and (3) a filter.
Detailed Description
The invention will be described in further detail with reference to the drawings and specific examples.
As shown in fig. 1, the present embodiment discloses a dual FID detection apparatus for methane and non-methane total hydrocarbon analysis, which includes a main pipe 1, a first pipe 2, a second pipe 3, a first FID detector 4 and a second FID detector 5, wherein one end of the first pipe 2 is connected to the first FID detector 4, and the other end of the first pipe 2 is communicated with the main pipe 1; one end of the second pipeline 3 is connected with a second FID detector 5, the other end of the second pipeline 3 is communicated with the main pipeline 1, and the first pipeline 2 and the second pipeline 3 are provided with flow control components 6; a catalytic furnace 7 is arranged on the second pipeline 3; the main pipeline 1 is provided with an air path control component 8.
The double-FID detection device for analyzing the total hydrocarbons of methane and non-methane in the embodiment adopts two FIDs, and can simultaneously analyze the total hydrocarbons of methane and non-methane in real time. The intelligent pressure stabilization of the pipeline can be realized through the gas circuit control component 8 and the flow control component 6, so that the concentration of the sample gas in the pipeline can be quickly consistent with the concentration of the environment, and the detection period is greatly shortened. The gas circuit is divided into two branches, one branch enters the FID through the flow control assembly 6 of the first pipeline 2 to perform total hydrocarbon analysis, the other branch enters the FID through the second pipeline 3 to perform non-methane hydrocarbon reaction through the catalytic furnace 7, the remaining methane enters the FID through the flow control assembly 6 to perform quantitative analysis, then the system calculates to obtain the content of the non-methane total hydrocarbon, real-time monitoring of the methane and the non-methane total hydrocarbon can be realized, and the result output speed reaches the second level.
In this embodiment, the air path control assembly 8 includes a pressure sensor and a proportional valve. The pressure of the main pipeline 1 can be accurately monitored in real time through the pressure sensor, and automatic adjustment is carried out through the proportional valve. In this embodiment, the device further comprises a control mechanism for controlling the flow control assembly 6 and the air path control assembly 8.
Through set up gas circuit control assembly 8 at trunk line 1, utilize pressure sensor to monitor trunk line 1's gas circuit, control mechanism receives pressure sensor's monitoring result, realize adjusting whole gas circuit according to monitoring result control proportional valve, discharge unnecessary gas when atmospheric pressure is too high, atmospheric pressure crosses lowly then closes the gas circuit through the proportional valve and carries out the pressurize, thereby realize that appearance gas concentration reaches unanimity with the environment rapidly, realize the quick automatically regulated of atmospheric pressure, the fluctuation influence that the interference brought mutually in having reduced many gas circuits, and then guarantee measurement accuracy, can not only promote by a wide margin and detect the precision, and can effectively accelerate detection speed. In other embodiments, the pneumatic control assembly 8 may be a flow sensor and a proportional valve.
In this embodiment, the flow control assembly 6 includes an air resistor, a pressure sensor, and a proportional valve. Atmospheric pressure fluctuation in first pipeline 2 and the second pipeline 3 can further be reduced through the air resistor, can real-time supervision first pipeline 2 and second pipeline 3's atmospheric pressure through pressure sensor, and control mechanism receives pressure sensor's monitoring result, according to monitoring result control proportional valve, realizes that first pipeline 2 and second pipeline 3's atmospheric pressure is stable, ensures that the sample gas steadily gets into FID, ensures that the testing result is more accurate. In other embodiments, the flow control assembly 6 may be a flow sensor and a proportional valve, and the first and second conduits 2, 3 may be stabilized without an air resistor.
In this implementation, the main pipeline 1 is close to the inlet end and is equipped with the pump body 9, and in will sample gas suction main pipeline 1 through the pump body 9, still be equipped with filter 10 between main pipeline 1 inlet end and the pump body 9. The impurities in the sample gas are filtered by the filter 10, and the detection precision is improved.
Above only the utility model discloses an it is preferred embodiment, the utility model discloses a scope of protection not only limits in above-mentioned embodiment, and the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, a plurality of modifications and decorations without departing from the principle of the present invention should be considered as the protection scope of the present invention.
Claims (8)
1. A double FID detection device for methane and non-methane total hydrocarbon analysis is characterized by comprising a main pipeline (1), a first pipeline (2), a second pipeline (3), a first FID detector (4) and a second FID detector (5), wherein one end of the first pipeline (2) is connected with the first FID detector (4), and the other end of the first pipeline (2) is communicated with the main pipeline (1); one end of the second pipeline (3) is connected with a second FID detector (5), the other end of the second pipeline (3) is communicated with the main pipeline (1), and flow control components (6) are arranged on the first pipeline (2) and the second pipeline (3); a catalytic furnace (7) is arranged on the second pipeline (3); and the main pipeline (1) is provided with a gas path control assembly (8).
2. The dual FID detection apparatus for methane and non-methane total hydrocarbon analysis according to claim 1, wherein the gas circuit control component (8) comprises a pressure sensor and a proportional valve.
3. The dual FID detection apparatus for methane and non-methane total hydrocarbon analysis according to claim 1, wherein the gas circuit control component (8) comprises a flow sensor and a proportional valve.
4. The dual FID detection apparatus for methane and non-methane total hydrocarbon analysis according to claim 1, wherein the flow control assembly (6) comprises a choke, a pressure sensor and a proportional valve.
5. The dual FID detection apparatus for methane and non-methane total hydrocarbon analysis according to claim 1, wherein the flow control assembly (6) comprises a flow sensor and a proportional valve.
6. The double FID detection apparatus for methane and non-methane total hydrocarbon analysis according to claim 1, characterized in that a pump body (9) is provided on the main pipe (1).
7. The double FID detection apparatus for methane and non-methane total hydrocarbon analysis according to claim 6, characterized in that a filter (10) is further provided between the intake end of the main pipe (1) and the pump body (9).
8. The dual FID detection apparatus for methane and non-methane total hydrocarbon analysis according to any of claims 1 to 7, further comprising a control mechanism for controlling the flow control assembly (6) and the gas circuit control assembly (8).
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| CN202023104962.1U CN214278048U (en) | 2020-12-21 | 2020-12-21 | double-FID detection device for analyzing methane and non-methane total hydrocarbons |
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| CN202023104962.1U CN214278048U (en) | 2020-12-21 | 2020-12-21 | double-FID detection device for analyzing methane and non-methane total hydrocarbons |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117054511A (en) * | 2023-10-13 | 2023-11-14 | 杭州盈创环境科技有限公司 | Non-methane total hydrocarbon detection device and method based on double detectors |
| CN117147671A (en) * | 2023-10-30 | 2023-12-01 | 杭州盈创环境科技有限公司 | Non-methane total hydrocarbon detection device and method based on dilution technology |
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2020
- 2020-12-21 CN CN202023104962.1U patent/CN214278048U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117054511A (en) * | 2023-10-13 | 2023-11-14 | 杭州盈创环境科技有限公司 | Non-methane total hydrocarbon detection device and method based on double detectors |
| CN117054511B (en) * | 2023-10-13 | 2024-01-12 | 杭州盈创环境科技有限公司 | Non-methane total hydrocarbon detection device and method based on double detectors |
| CN117147671A (en) * | 2023-10-30 | 2023-12-01 | 杭州盈创环境科技有限公司 | Non-methane total hydrocarbon detection device and method based on dilution technology |
| CN117147671B (en) * | 2023-10-30 | 2024-02-06 | 杭州盈创环境科技有限公司 | Non-methane total hydrocarbon detection device and method based on dilution technology |
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Address after: 410221 floor 101-5, production building, No. 558, tongzipo West Road, Changsha high tech Development Zone, Changsha City, Hunan Province Patentee after: Youtai (Hunan) Environmental Protection Technology Co.,Ltd. Address before: 518067 d3-2b, TCL Science Park, No. 1001, Zhongshan Park Road, Xili street, Nanshan District, Shenzhen, Guangdong Patentee before: NUTECH SHENZHEN Co.,Ltd. |