CN111257474A - Purging and trapping system and device - Google Patents
Purging and trapping system and device Download PDFInfo
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- CN111257474A CN111257474A CN202010219293.8A CN202010219293A CN111257474A CN 111257474 A CN111257474 A CN 111257474A CN 202010219293 A CN202010219293 A CN 202010219293A CN 111257474 A CN111257474 A CN 111257474A
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- purge
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- 238000010926 purge Methods 0.000 title claims abstract description 61
- 238000005070 sampling Methods 0.000 claims abstract description 71
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 30
- 239000007789 gas Substances 0.000 claims description 26
- 239000012159 carrier gas Substances 0.000 claims description 21
- 238000000642 dynamic headspace extraction Methods 0.000 claims description 11
- 238000009423 ventilation Methods 0.000 claims description 4
- 238000001514 detection method Methods 0.000 abstract description 9
- 238000012544 monitoring process Methods 0.000 abstract description 3
- 238000010408 sweeping Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 11
- 239000007788 liquid Substances 0.000 description 6
- 239000000126 substance Substances 0.000 description 3
- 238000007664 blowing Methods 0.000 description 2
- 230000018044 dehydration Effects 0.000 description 2
- 238000006297 dehydration reaction Methods 0.000 description 2
- 238000001926 trapping method Methods 0.000 description 2
- 238000009835 boiling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
- G01N30/04—Preparation or injection of sample to be analysed
- G01N30/06—Preparation
- G01N30/08—Preparation using an enricher
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
- G01N30/04—Preparation or injection of sample to be analysed
- G01N30/06—Preparation
- G01N30/14—Preparation by elimination of some components
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Biomedical Technology (AREA)
- Molecular Biology (AREA)
- Engineering & Computer Science (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention relates to the technical field of trapping systems, and provides a purging trapping system and a purging trapping device, wherein the purging trapping system comprises a rotating unit, a gas circuit unit, a water removal unit, a trapping unit and an analysis unit are respectively connected to the rotating unit, the gas circuit unit and the water removal unit which are far away from the rotating unit are respectively connected with a purging unit, and the purging unit is also connected with a sampling unit and a water drainage unit; in this technical scheme, the entrapment system volume of sweeping can set up according to actual conditions, both had been applicable to in the laboratory, also was applicable to and goes out to carry. On one hand, the on-site sample collection and on-site detection can be realized; on the other hand, the collection and monitoring process of the sample is simple, and the efficiency is improved.
Description
Technical Field
The invention relates to the technical field of trapping systems, in particular to a purging trapping system and equipment.
Background
The purging and trapping method is suitable for volatile or semi-volatile substances with low boiling points and low solubility dissolved in liquid.
And blowing out substances in the sample by using flowing gas, adsorbing the blown-out substances by using a trapping unit, and heating the trapping unit to send the sample into a gas chromatograph for analysis. The sweeping and trapping method has the advantages of less sampling amount, high enrichment efficiency and the like, so that the method is widely applied.
However, the purging and trapping system or device in the prior art is often large in size and is only suitable for use in a laboratory. On one hand, the requirement on timeliness is high, and the work of collecting a field sample and completing detection cannot be realized. On the other hand, for some water sources and the like which need to be monitored for a long time in the prior art, people need to be dispatched to the area needing to be monitored for sampling at regular time and then are taken back to a laboratory for analysis, the acquisition and detection process is complicated, and the efficiency needs to be improved.
How to effectively solve the technical problems is a problem to be solved by the technical personnel in the field at present.
Disclosure of Invention
To solve the above technical problem or at least partially solve the above technical problem, the present invention provides a purge trap system.
The blowing and trapping system comprises a rotating unit, and the rotating unit is respectively connected with a gas circuit unit, a dewatering unit, a trapping unit and an analysis unit.
The gas circuit unit and the dewatering unit which are far away from the rotating unit side are respectively connected with a purging unit.
The purging unit is also connected with a sampling unit and a drainage unit.
Optionally, the water removal unit includes a water removal pipeline, and a water removal device is arranged on the water removal pipeline.
The end part of the water removal unit and the end part of the gas circuit unit, which are far away from the rotating unit side, are respectively connected with different connecting ports of the purging unit.
The dewatering pipeline is connected with the trapping unit through the rotating unit.
Optionally, the gas circuit unit includes a vent pipeline, and the vent pipeline is provided with an electromagnetic valve, a carrier gas unit, and an air outlet unit, respectively.
The ventilation pipeline is connected with the trapping unit through the rotating unit.
Optionally, the drainage unit includes a drainage pipeline, and the drainage pipeline is provided with an electromagnetic valve.
The drainage pipeline far away from the side of the purging unit is connected with the sampling unit.
Optionally, the sampling unit comprises a sampling pipe.
The sampling pipeline comprises a first sampling pipeline and a second sampling pipeline.
The first sampling pipeline is connected with an electromagnetic valve and a storage device for objects to be detected respectively.
And the second sampling pipeline is respectively connected with an electromagnetic valve and a quantitative sampling device.
Optionally, a calibration standard sample unit is further disposed on the first sampling pipeline.
The calibration standard sample unit comprises a calibration pipeline, and the calibration pipeline is provided with an electromagnetic valve and a calibration standard sample device respectively.
Optionally, the carrier gas unit includes a carrier gas pipeline, and the carrier gas pipeline is provided with a pressure valve and a mass flow controller respectively.
Optionally, the air outlet unit comprises an air outlet pipeline, and the air outlet pipeline is also provided with an electromagnetic valve.
Optionally, the first sampling pipeline is connected with the second sampling pipeline.
The end part of the first sampling pipeline far away from the side of the to-be-detected object storage device is connected with the purging unit.
A purging and trapping device comprises a device shell, wherein any purging and trapping system is arranged in the device shell.
In the invention, a sample to be detected is introduced into the purging unit by the sampling unit, the sample to be detected in the purging unit is purged by the gas circuit unit, gas in the sample to be detected enters the capturing unit through the east-turning unit after the purged sample to be detected is subjected to dehydration by the dehydration unit, the gas passing through the capturing unit enters the analysis unit through the rotation unit for analysis, and residual liquid in the purging unit is discharged through the drainage unit.
The volume of the purging and trapping system can be set according to actual conditions, and the purging and trapping system is suitable for being used in a laboratory and is also suitable for being carried outdoors. On one hand, the on-site sample collection and on-site detection can be realized; on the other hand, the collection and monitoring process of the sample is simple, and the efficiency is improved.
Drawings
Fig. 1 is a schematic structural diagram of a purge and trap system provided by the present invention.
Reference numerals:
1. a rotating unit;
2. a gas path unit; 21. a carrier gas unit; 211. a carrier gas line; 212. a mass flow controller; 213. a pressure valve; 22. an air outlet unit; 221. an air outlet pipeline; 23. a vent line;
3. a purging unit;
4. a sampling unit; 41. a second sampling line; 411. a quantitative sampling device; 42. a first sampling line; 421. a device for storing the object to be tested; 43. calibrating the standard sample unit; 431. calibrating a pipeline; 432. calibrating the standard sample device;
5. a drainage unit; 51. a drain line;
6. an electromagnetic valve;
7. a water removal unit; 71. a water removal pipeline; 72. a water removal device;
8. an analysis unit;
9. a trap unit.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, the present invention will be further described in detail with reference to the accompanying drawings and examples. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. The following examples are intended to illustrate the invention, but not to limit it. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention, are within the scope of the invention. Unless otherwise specified, the technical means used in the examples are conventional means well known to those skilled in the art.
It is noted that, in this document, relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. The terms "connected" and "coupled" are used broadly and may include, for example, a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
In an embodiment of the present invention, as shown in fig. 1, a purging and trapping system includes a rotating unit 1, and a gas path unit 2, a water removal unit 7, a trapping unit 9, and an analysis unit 8 are respectively connected to the rotating unit 1.
The gas path unit 2 and the dewatering unit 7 which are far away from the side of the rotating unit 1 are respectively connected with a purging unit 3.
The purging unit 3 is also connected with a sampling unit 4 and a drainage unit 5.
In this embodiment, the sampling unit 4 leads the sample to be detected into the purging unit 3, the gas circuit unit 2 purges the sample to be detected in the purging unit 3, the sample to be detected after purging passes through the water removal unit 7 for water removal, the gas in the sample to be detected enters the capturing unit 6 through the rotating unit 1, the gas passing through the capturing unit 6 enters the analyzing unit 8 through the rotating unit 1 for analysis, and the residual liquid in the purging unit 3 is discharged through the water drainage unit 5.
The volume of the purging and trapping system can be set according to actual conditions, and the purging and trapping system is suitable for being used in a laboratory and is also suitable for being carried outdoors. On one hand, the on-site sample collection and on-site detection can be realized; on the other hand, the collection and monitoring process of the sample is simple, and the efficiency is improved.
In another embodiment of the present invention, as shown in fig. 1, the water removing unit 7 includes a water removing pipeline 71, and a water removing device 72 is disposed on the water removing pipeline 71.
The end of the dewatering unit 7 far away from the rotating unit 1 and the end of the gas path unit 2 are respectively connected with different connecting ports of the purging unit 3.
The water removal line 71 is connected to the trap unit 9 through the rotation unit 1.
In the present embodiment, the purge unit 3 is a U-shaped purge bottle. Adopt water trap 72 among the prior art can, water trap 72 can realize getting rid of the liquid in the sample that awaits measuring, further promotes the gaseous precision of detection in-process.
The rotating unit 1 is a six-way valve. The trap unit 9 may be a trap device of the related art.
In another embodiment of the present invention, as shown in fig. 1, the air path unit 2 includes a ventilation pipeline 23, and the ventilation pipeline 23 is respectively provided with an electromagnetic valve 6, a carrier gas unit 21, and an air outlet unit 22.
The vent line 23 is connected to the trap unit 9 via the rotation unit 1.
In the present embodiment, electromagnetic valves 6 are provided on the vent line at both ends near the junction of the carrier gas unit 21 and the vent line 23, respectively. In which an electromagnetic valve 6 is provided on a vent line 23 between the carrier gas unit 21 and the outlet gas unit 22.
In another embodiment of the present invention, as shown in fig. 1, the drain unit 5 includes a drain line 51, and the drain line 51 is provided with an electromagnetic valve 6.
The drain line 51 on the side remote from the purge unit 3 is connected to the sampling unit 4.
In this embodiment, when the drain unit 5 drains, the solenoid valve 6 on the drain line 51 is opened, and the other solenoid valves 6 are closed.
In another embodiment of the present invention, as shown in fig. 1, the sampling unit 4 includes a sampling pipeline.
The sampling lines include a first sampling line 42 and a second sampling line 41.
The first sampling pipe 42 is connected to the solenoid valve 6 and the device 421 for storing objects to be tested, respectively.
The second sampling pipe 41 is connected to the solenoid valve 6 and the quantitative sampling device 411, respectively.
In the present embodiment, two electromagnetic valves 6 are disposed on the first sampling line 42, and the second sampling line 41 is disposed between the two electromagnetic valves 6 on the first sampling line 42. In the process of taking a sample to be measured, the sample can be taken through the first sampling pipeline 41, and can also be taken through the second sampling pipeline 42.
When sampling is performed through the first sampling pipe 41, the solenoid valve 6 on the first sampling pipe 41 is opened, and the other solenoid valves 6 are all closed. The end of the first sampling pipeline 42 far away from the side of the purging unit 3 is placed in the device 421, and the device to be tested in the device 421 is sampled and then is introduced into the purging unit 3.
When sampling is performed through the second sampling line 41, the solenoid valve 6 on the second sampling line 41 near the purge unit 3 side is opened, and the other solenoid valves 6 are all closed. The quantitative sampling device 411 realizes quantitative sampling according to sampling requirements, and a quantitative object to be detected is introduced into the purging unit 3.
In another embodiment of the present invention, as shown in fig. 1, a calibration standard sample unit 43 is further disposed on the first sampling pipeline 42.
The calibration standard sample unit 43 includes a calibration pipeline 431, and the solenoid valve 6 and the calibration standard sample device 432 are respectively disposed on the calibration pipeline 431.
In this embodiment, the calibration standard device 432 is added to the sample to be tested for determining the percentage of the component to be tested in the sample to be tested. The calibration sample device 432 is switched by the solenoid valve 6 on the calibration line 431.
In another embodiment of the present invention, as shown in fig. 1, the carrier gas unit 21 includes a carrier gas pipeline 211, and the carrier gas pipeline 211 is provided with a pressure valve 213 and a mass flow controller 212, respectively.
In this embodiment, when the gas circuit unit 2 purges the sample to be tested in the purging unit 3, the electromagnetic valve 6 on the vent line 23 near the side of the out-purging unit 3 is opened, the other electromagnetic valves 6 are all closed, and the carrier gas enters the purging unit 3 after entering the vent line 23 through the carrier gas pipeline 211.
The pressure valve 213 of the carrier gas line 211 and the solenoid valves 6 of the vent lines 23 adjacent to the rotary unit 1 are opened, the other solenoid valves 6 are closed, and the carrier gas enters the vent lines 23 through the carrier gas line 211 and then enters the trap unit 9 through the rotary unit 1.
After the detection and analysis of the sample to be detected are finished, the residue in the trapping unit 9 enters the purging unit 3 through the dewatering unit 7, the electromagnetic valve 6 in the drainage unit 5 is opened, other electromagnetic valves 6 are closed, and the residue in the purging unit 3 is discharged through the drainage unit 5.
The analyzing unit 8 may be an analyzing apparatus and an analyzing system in the related art.
When the purging unit 3 needs to be cleaned, the sampling unit 4 introduces a water source into the purging unit 3, respectively opens the electromagnetic valve 6 on the vent pipeline 23 close to the purging unit 3 and the electromagnetic valve 6 on the drainage unit 5, closes the other electromagnetic valves 6, cleans the purging unit 3 by the carrier gas through the vent pipeline 211 and the vent pipeline 23, and directly discharges the cleaned water source through the drainage unit 5.
In another embodiment of the present invention, as shown in fig. 1, the air outlet unit 22 includes an air outlet pipe 221, and the air outlet pipe 221 is also provided with an electromagnetic valve 6.
In this embodiment, the electromagnetic valve 6 on the gas outlet pipe 221 is opened, the other electromagnetic valves 6 are all closed, and the gas after the detection and analysis is discharged through the gas outlet pipe 221.
In another embodiment of the present invention, as shown in fig. 1, a first sampling pipe 42 is connected to a second sampling pipe 41.
The end of the first sampling line 42 away from the side of the device 421 for storing objects to be tested is connected to the purge unit 3.
In this embodiment, when the pipeline between the sample to be detected and the quantitative sampling device 411 is long, after the system stops working for a period of time, a part of air and liquid residues exist in the pipeline, the electromagnetic valve 6 on the second sampling pipeline 41 is opened, other electromagnetic valves 6 are all closed, and the air and liquid residues in the second sampling pipeline 41 are discharged through the drainage unit 5, so as to ensure the sampling precision in the next detection process.
According to another embodiment provided by the invention, the purging and trapping device comprises a device shell, and any one of the purging and trapping systems is arranged in the device shell.
In this embodiment, the size of the device housing is produced and installed according to the use requirement, and the device housing can be suitable for different application scenarios and application environments.
Finally, it should be noted that: the above examples are only for illustrating the technical solutions of the present invention, and are not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments. Those of ordinary skill in the art will understand that: it is to be understood that modifications may be made to the above-described arrangements in the embodiments or equivalents may be substituted for some of the features of the embodiments without departing from the spirit of the present invention.
Claims (10)
1. A purging and trapping system is characterized in that,
the device comprises a rotating unit, wherein the rotating unit is respectively connected with a gas circuit unit, a dewatering unit, a trapping unit and an analysis unit;
the gas circuit unit and the dewatering unit which are far away from the rotating unit are respectively connected with a purging unit;
the purging unit is also connected with a sampling unit and a drainage unit.
2. The purge and trap system of claim 1,
the water removal unit comprises a water removal pipeline, and a water removal device is arranged on the water removal pipeline;
the end part of the water removal unit far away from the rotating unit side and the end part of the gas circuit unit are respectively connected with different connecting ports of the purging unit;
the dewatering pipeline is connected with the trapping unit through the rotating unit.
3. The purge and trap system of claim 1,
the gas circuit unit comprises a vent pipeline, and an electromagnetic valve, a carrier gas unit and a gas outlet unit are respectively arranged on the vent pipeline;
the ventilation pipeline is connected with the trapping unit through the rotating unit.
4. The purge and trap system of claim 1,
the drainage unit comprises a drainage pipeline, and an electromagnetic valve is arranged on the drainage pipeline;
the drainage pipeline far away from the side of the purging unit is connected with the sampling unit.
5. The purge and trap system of claim 1,
the sampling unit comprises a sampling pipeline;
the sampling pipeline comprises a first sampling pipeline and a second sampling pipeline;
the first sampling pipeline is respectively connected with an electromagnetic valve and a storage device for objects to be detected;
and the second sampling pipeline is respectively connected with an electromagnetic valve and a quantitative sampling device.
6. The purge and trap system of claim 5,
a calibration standard sample unit is also arranged on the first sampling pipeline;
the calibration standard sample unit comprises a calibration pipeline, and the calibration pipeline is provided with an electromagnetic valve and a calibration standard sample device respectively.
7. A purge and trap system as in claim 3 wherein said carrier gas unit comprises a carrier gas line having a pressure valve and a mass flow controller disposed thereon, respectively.
8. The purge and trap system of claim 3, wherein the outlet unit comprises an outlet line, and a solenoid valve is disposed on the outlet line.
9. The purge and trap system of claim 5,
the first sampling pipeline is connected with the second sampling pipeline;
the end part of the first sampling pipeline far away from the side of the to-be-detected object storage device is connected with the purging unit.
10. A purge and trap apparatus comprising an apparatus housing having disposed therein the purge and trap system of any of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010219293.8A CN111257474A (en) | 2020-03-25 | 2020-03-25 | Purging and trapping system and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010219293.8A CN111257474A (en) | 2020-03-25 | 2020-03-25 | Purging and trapping system and device |
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| CN111257474A true CN111257474A (en) | 2020-06-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010219293.8A Pending CN111257474A (en) | 2020-03-25 | 2020-03-25 | Purging and trapping system and device |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101609074A (en) * | 2009-07-17 | 2009-12-23 | 国家海洋环境监测中心 | Be applicable to the refrigeration-type purge and trap instrument of nitrous oxide |
| CN203275420U (en) * | 2013-04-28 | 2013-11-06 | 力合科技（湖南）股份有限公司 | On-line pretreatment device for detection of VOCs (volatile organic comopunds) in water |
| CN104122403A (en) * | 2013-04-28 | 2014-10-29 | 力合科技（湖南）股份有限公司 | Online pretreatment device for detecting VOCs (volatile organic compounds) in water |
| CN110426480A (en) * | 2019-09-10 | 2019-11-08 | 中绿环保科技股份有限公司 | A kind of real time on-line monitoring equipment of water quality volatile organic matter |
| CN211927804U (en) * | 2020-03-25 | 2020-11-13 | 北京踏实德研仪器有限公司 | Purging and trapping system and device |
-
2020
- 2020-03-25 CN CN202010219293.8A patent/CN111257474A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101609074A (en) * | 2009-07-17 | 2009-12-23 | 国家海洋环境监测中心 | Be applicable to the refrigeration-type purge and trap instrument of nitrous oxide |
| CN203275420U (en) * | 2013-04-28 | 2013-11-06 | 力合科技（湖南）股份有限公司 | On-line pretreatment device for detection of VOCs (volatile organic comopunds) in water |
| CN104122403A (en) * | 2013-04-28 | 2014-10-29 | 力合科技（湖南）股份有限公司 | Online pretreatment device for detecting VOCs (volatile organic compounds) in water |
| CN110426480A (en) * | 2019-09-10 | 2019-11-08 | 中绿环保科技股份有限公司 | A kind of real time on-line monitoring equipment of water quality volatile organic matter |
| CN211927804U (en) * | 2020-03-25 | 2020-11-13 | 北京踏实德研仪器有限公司 | Purging and trapping system and device |
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