CN211292275U - Sampling enrichment instrument before VOC detection - Google Patents
Sampling enrichment instrument before VOC detection Download PDFInfo
- Publication number
- CN211292275U CN211292275U CN201922215075.2U CN201922215075U CN211292275U CN 211292275 U CN211292275 U CN 211292275U CN 201922215075 U CN201922215075 U CN 201922215075U CN 211292275 U CN211292275 U CN 211292275U
- Authority
- CN
- China
- Prior art keywords
- enrichment
- pipe
- dehydration
- dehydration tube
- sampling
- 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
Images
Landscapes
- Sampling And Sample Adjustment (AREA)
- Drying Of Gases (AREA)
Abstract
The utility model belongs to the technical field of VOC sampling, in particular to a sampling and enriching instrument before VOC detection, wherein an enriching and desorbing module comprises an enriching pipe, an enriching pipe positioning frame internally provided with an enriching pipe holding bin, an enriching pipe heating device and an enriching pipe refrigerating device; the enrichment pipe is communicated with a dehydration pipe of the dehumidification module, adsorbent is filled in the enrichment pipe, a control valve is arranged on an air outlet pipeline of the enrichment pipe, temperature sensors are arranged in the enrichment pipe and the dehydration pipe, and the temperature sensors send signals to the controller to control the heating device and the refrigerating device; can frequently switch low temperature and high temperature state, do not have the semiconductor because of the too big fragmentation of difference in temperature, improve enrichment efficiency, still set up the radiating effect that forced air cooling and water-cooling mechanism can strengthen the refrigeration piece for cooling efficiency, independent module set up the convenient maintenance washing, reduce inlet line dead volume, improve the data accuracy.
Description
Technical Field
The utility model belongs to the technical field of the VOC sampling, a VOC sampling enrichment instrument is related to, specifically is a sampling enrichment instrument before VOC detects.
Background
When the concentration in the air does not reach the detection concentration of the detector, the air needs to pass through an enrichment device before the air enters the detector, the enrichment device has the function of adsorbing and enriching the contents of pollutants such as VOC in a large amount of gas, and when the concentration reaches a certain concentration, the pollutants enter the detector in an air source mode to collect the types and parameters of the pollutants.
SUMMERY OF THE UTILITY MODEL
Not enough to prior art, the utility model provides a sampling enrichment instrument before VOC detects can cool down the refrigeration rapidly for the speed of enrichment sampling reduces the intake pipe dead volume and obtains the higher data of precision, still easy to maintain washs.
The utility model provides a sampling enrichment instrument before VOC detects, includes the controller and by the dehumidification module, enrichment and desorption module that set gradually on the bottom plate that controller control, the key is: the enrichment and desorption module comprises an enrichment pipe, an enrichment pipe positioning frame, an enrichment pipe heating device and an enrichment pipe refrigerating device, wherein the enrichment pipe positioning frame is internally provided with an enrichment pipe accommodating bin; the enrichment pipe is communicated with a dehydration pipe of the dehumidification module, an adsorbent is filled in the enrichment pipe, a control valve is arranged on a gas outlet end pipeline of the enrichment pipe, temperature sensors are arranged inside the enrichment pipe and the dehydration pipe, a signal output end of each temperature sensor is connected with a signal input end of a controller, and a control end of each controller is connected with a controlled end of a heating device and a controlled end of a refrigerating device respectively.
The dehydration module comprises a dehydration pipe containing cavity, a dehydration pipe positioning frame, a heating device and a refrigerating device, wherein the dehydration pipe is fixed by the aid of the dehydration pipe positioning frame with the dehydration pipe containing cavity; the air outlet of the dewatering pipe is communicated with the air inlet of the enrichment pipe by virtue of a pipeline with an electromagnetic valve, and the controlled end of the electromagnetic valve is connected with the control end of the controller.
The enrichment instrument further comprises an N-level enrichment and desorption module, the N-level enrichment and desorption module is connected with the help of a pipeline with a gas circuit valve and an enrichment pipe gas outlet end pipeline of the enrichment and desorption module, N is a positive integer larger than N, the N-level enrichment and desorption module contains N-1 enrichment and desorption modules, and the enrichment and desorption modules are sequentially connected end to end with the help of the pipeline with the gas circuit valve.
The enrichment pipe locating rack comprises an enrichment pipe upper clamp plate and an enrichment pipe lower clamp plate which are provided with grooves, and the grooves of the enrichment pipe upper clamp plate and the enrichment pipe lower clamp plate are spliced to form an enrichment pipe accommodating bin.
The refrigerating device comprises a group of refrigerating sheets positioned between the bottom plate and the enrichment pipe lower clamping plate/the dehydration pipe lower clamping plate, the lower end faces of the refrigerating sheets are coated with silicone grease to be attached to the bottom plate, the upper end faces of the refrigerating sheets are coated with silicone grease to be attached to the enrichment pipe lower clamping plate/the dehydration pipe lower clamping plate, and the controlled ends of the refrigerating sheets are connected with the control end of the controller.
The refrigerating device further comprises an air cooling mechanism, the air cooling mechanism comprises a group of cooling fins arranged at the lower end of the bottom plate and attached to the bottom plate, and the air outlet faces the cooling fins and is controlled by a fan controlled by a controller.
The refrigerating device also comprises a water cooling mechanism, the water cooling mechanism comprises a cooling coil which is arranged in the gap of the cooling fin and is detachably connected with the cooling fin, and a liquid inlet and a liquid outlet of the cooling coil are respectively provided with an electromagnetic valve controlled by a controller.
The cooling coil comprises a transverse pipeline and a longitudinal pipeline which are of a grid-shaped structure, the transverse pipeline is communicated with the longitudinal pipeline, the liquid inlet and the liquid outlet are respectively provided with one, and the ports of the other pipelines are sealed by virtue of plugs.
The liquid outlet is higher than the liquid inlet.
The diameter of the inner wall of the dehydration tube is 1-3 mm; the diameter of the inner wall of the enrichment pipe is 1-5 mm.
The utility model has the advantages that: a sampling enrichment instrument before VOC detection is provided, wherein a heating device and a refrigerating piece are arranged on the outer side of an enrichment pipe, the refrigerating piece is not in contact with a heating wire, the enrichment pipe is refrigerated or heated, low-temperature and high-temperature states can be frequently switched, the refrigerating piece does not need to be broken due to too large instantaneous temperature difference, and the acquisition efficiency and accuracy are higher; the gas path valve switching module is separated from the gas path valve switching module, and the gas path valve switching module can be independently placed at a sample inlet of an analytical instrument, so that the dead volume of a gas inlet pipeline is reduced, and the measured data precision is higher.
Air enters the dewatering pipe, and the dewatering pipe is thin in the process, so that the water in the dewatering pipe can be fully cooled, full physical dewatering is carried out, and the interference of the water is reduced; meanwhile, the bottom of the refrigerating sheet is provided with an air cooling mechanism and a water cooling mechanism, so that the heat dissipation effect of the refrigerating sheet is further enhanced, and the dehydration pipe and the enrichment pipe can be quickly cooled to proper temperatures; the gas outlet of dehydration pipe and enrichment pipe all communicates with each other with the air to can make the moisture in the dehydration pipe become the clean pipeline of vapor and arrive the air side by side through high temperature, the enrichment pipe can lead to the clean pipeline of nitrogen gas side by side to the air in by high temperature, it is clean convenient, dehydration pipe and enrichment pipe set up independently simultaneously, convenient dismantlement, washing, maintenance, can set up the enrichment pipe of different thicknesses in N level enrichment and the desorption module, thicker enrichment pipe can fully adsorb VOC, thinner enrichment pipe can reduce the air inlet line dead volume.
Drawings
Fig. 1 is a schematic structural diagram of the present invention;
fig. 2 is a top cross-sectional view of the present invention;
fig. 3 is a front cross-sectional view of the present invention;
fig. 4 is a front view of the present invention;
FIG. 5 is a functional block diagram of the present embodiment;
in the attached drawing, 1, an enrichment and desorption module, 2, a support, 3, a refrigeration sheet, 4, a dehydration pipe, 5, a bottom plate, 51, a cooling sheet, 52, a cooling coil, 53, a plug, 6, an enrichment pipe, 7, an enrichment pipe positioning frame, 71, an enrichment pipe upper clamping plate, 72, an enrichment pipe lower clamping plate, 8, a dehydration pipe positioning frame, 81, a dehydration pipe upper clamping plate, 82 and a dehydration pipe lower clamping plate.
Detailed Description
To prior art's not enough, this embodiment provides a sampling enrichment instrument before VOC detects, can cool down the refrigeration rapidly for the speed of enrichment sampling, reduce the intake pipe dead volume and obtain the higher data of precision, still easy to maintain washs.
As shown in fig. 1 and 2, the sampling and enriching instrument before VOC detection comprises a controller, and a dehumidification module, an enrichment and desorption module 1 which are controlled by the controller and are sequentially arranged on a bottom plate 5, and the key is that: the enrichment and desorption module 1 comprises an enrichment pipe 6, an enrichment pipe positioning frame 7, an enrichment pipe 6 heating device and an enrichment pipe 6 refrigerating device, wherein the enrichment pipe positioning frame is internally provided with an enrichment pipe accommodating bin; enrichment pipe 6 and the dehydration pipe 4 intercommunication of dehumidification module, enrichment pipe 6 intussuseption is filled with the adsorbent, is provided with control valve 61 on the outlet end pipeline of enrichment pipe 6, and enrichment pipe 6 and dehydration pipe 4 are inside all to be provided with temperature sensor, and temperature sensor's signal output part and controller's signal input part are connected, and the control end of controller is connected with heating device, refrigerating plant's controlled end respectively.
The dehydration tube 4 is fixed by means of a dehydration tube positioning frame 8 with a dehydration tube accommodating cavity, the dehydration tube 4 is arranged in the dehydration tube accommodating cavity, in the embodiment, the diameter of the inner wall of the dehydration tube 4 is 2mm, the diameter of the inner wall of the dehydration tube 4 is smaller, and the moisture of sample gas can be fully removed, the dehydration tube positioning frame 8 comprises a dehydration tube upper clamp plate 81 with a groove and a dehydration tube lower clamp plate 82, the dehydration tube upper clamp plate 81 and the groove of the dehydration tube lower clamp plate 82 are buckled to form the dehydration tube accommodating cavity, and the dehumidification module further comprises a heating device sleeved outside the dehydration tube 4 and a refrigerating device arranged below the dehydration tube 4; the air outlet of the dewatering pipe 4 is communicated with the air inlet of the enrichment pipe 6 by a pipeline with an electromagnetic valve, and the controlled end of the electromagnetic valve is connected with the control end of the controller.
Preferably, the second-stage enrichment and desorption module is arranged in the embodiment, compared with the first-stage enrichment and desorption module and the enrichment and desorption module with more than three stages, the interference of moisture and other gases can be reduced to the maximum extent, the loss of the gases in the pipeline is also reduced, and finally the measured data is more accurate. In the embodiment, a second-stage enrichment and desorption module which is connected with the pipeline of the gas outlet end of the enrichment pipe 6 of the enrichment and desorption module 1 by virtue of the pipeline with the electromagnetic valve is also arranged, the second-stage enrichment and desorption module has the same structure with the enrichment and desorption module 1, and is connected with the pipeline of the gas outlet end of the enrichment pipe 6 of the enrichment and desorption module 1 by virtue of the pipeline with the electromagnetic valve, wherein the diameter of the inner wall of the enrichment pipe 6 is 5mm, the diameter of the inner wall of the second-stage enrichment pipe of the second-stage enrichment and desorption module is 3mm, the enrichment pipe 6 in the enrichment and desorption module 1 is thick and can fully adsorb VOC, the second-stage enrichment pipe in the second-stage enrichment and desorption module is.
In the embodiment, before the gas enters the dehydration pipe 4, the volume of the entering sample gas is determined by a gas collection device with a flowmeter and a timer, the selected pipeline is a transparent rubber pipe, and the dehydration pipe 4, the enrichment pipe 6 and the enrichment pipe 8 are all quartz pipes.
As shown in fig. 5, a refrigeration sheet is selected as a dehydration tube refrigeration device, a controller sends a signal to an electromagnetic valve at the air outlet of a dehydration tube 4 to enable the dehydration tube 4 to be communicated with an enrichment tube 6, in order to ensure the accuracy of temperature, a temperature sensor is arranged on the dehydration tube 4, when the temperature sensor detects that the temperature is cooled to-40 ℃, the sensor sends a signal to the controller to enable the temperature in the dehydration tube 4 to be kept at-40 ℃, original sample gas enters the dehydration tube 4 along a transparent rubber tube through a sampling pump power system, at the moment, the low temperature in the dehydration tube 4 enables the moisture in the sample gas to be rapidly condensed into ice, the moisture is sufficiently removed before the sample gas enters the enrichment tube 6, and the interference of the moisture on a measurement result is avoided; meanwhile, the controller sends a signal to a refrigerating device of the enrichment pipe 6 to start refrigeration, when the temperature sensor detects that the temperature reaches minus 20 ℃, the controller sends a signal to the controller to keep the enrichment pipe 6 at minus 20 ℃, the controller also sends a signal to a control valve 61 at the air outlet of the enrichment pipe 6 to enable the air outlet of the enrichment pipe 6 to be communicated with the air, the dehydrated sample gas enters the enrichment pipe 6 along a transparent rubber pipe, the enrichment pipe 6 is filled with an adsorbent, the adsorbent is formed by mixing and filling a carbon molecular sieve and graphite carbon black, the air outlet of the enrichment pipe 6 is communicated with the air, the dehydrated sample gas enters the enrichment pipe 6, the VOC is adsorbed and enriched by the adsorbent, and other components are discharged into the air.
In order to enable the result to be more accurate, the controller sends a signal to a refrigerating sheet of the dehydrating pipe refrigerating device, the temperature in the dehydrating pipe 4 is adjusted to be 5-10 ℃ by means of the temperature sensor, nitrogen is introduced into the dehydrating pipe 4, VOC which does not leave the dehydrating pipe 4 is blown into the enrichment pipe 6 by the nitrogen, the enrichment pipe 6 is kept at the temperature of-20 ℃, the air outlet is communicated with the air, VOC is adsorbed again, and the nitrogen is discharged into the air through the air outlet of the enrichment pipe 6.
At the moment, VOC in the sample gas is completely adsorbed into the adsorbent in the enrichment pipe 6, the controller sends a signal to a control valve 61 of an air outlet of the enrichment pipe 6 to enable the enrichment pipe 6 to be communicated with a secondary enrichment pipe in a secondary enrichment and desorption module, the controller sends a signal to a refrigerating device of the secondary enrichment pipe to enable the secondary enrichment pipe to be cooled, the temperature in the secondary enrichment pipe is adjusted to-40 ℃ by a temperature sensor in the secondary enrichment pipe, meanwhile, the controller also controls an electromagnetic valve to enable the air outlet of the secondary enrichment pipe to be communicated with air, the controller sends a signal to a refrigerating device of the enrichment pipe 6 to stop refrigerating, a heating device 6 of the enrichment pipe 6 is started, a heating wire is preferably selected by the heating device of the enrichment pipe 6 to enable the temperature in the enrichment pipe 6 to reach 350 ℃, the adsorbent is filled in the secondary enrichment pipe and is mixed and filled by a carbon molecular sieve and carbon black, nitrogen is introduced into the enrichment pipe 6, the adsorbent in the enrichment pipe 6 is desorbed at a high temperature of 350 ℃, the VOC is blown into the secondary enrichment pipe along with the nitrogen and is adsorbed by the adsorbent at a low temperature of-40 ℃ in the secondary enrichment pipe, and the nitrogen is discharged into the air from the air outlet of the secondary enrichment pipe until the VOC in the sample gas is completely adsorbed by the adsorbent in the secondary enrichment pipe.
The controller sends a signal to the enrichment pipe 6 to stop air from entering the secondary enrichment pipe, nitrogen gas is stopped from entering the enrichment pipe 6, meanwhile, the controller sends a signal to a refrigerating piece of the secondary enrichment pipe cooling device to stop refrigerating, a signal is sent to a heating device of the secondary enrichment pipe to start heating, the enrichment pipe heating device selects a heating wire, a temperature sensor in the secondary enrichment pipe is used for enabling the temperature in the secondary enrichment pipe to reach 350 ℃, helium gas is led into the enrichment pipe 8 at the same time, the adsorbent is heated to remove adsorption, the controller sends a signal to an electromagnetic valve at the air outlet of the secondary enrichment pipe to enable the secondary enrichment pipe to be connected with the air inlet of the detector, and VOC enters the detector along with the helium gas.
After the dehydration tube 4 is used, the controller sends a signal to close refrigeration, sends a signal to a heating device of the dehydration tube 4 to heat to 200 ℃, sample gas in the dehydration tube 4 is evaporated into water vapor at high temperature when encountering ice formed by condensation, the inner wall of the whole dehydration tube 4 is cleaned, and the water vapor is blown out through a sample gas inlet, so that time-consuming and labor-consuming operations such as disassembly are not needed; the controller sends a signal to a refrigerating device of the enrichment pipe 6 to stop refrigerating, sends a signal to a heating device of the enrichment pipe to heat to 350 ℃, and is internally filled with nitrogen to clean the enrichment pipe 6, and the nitrogen is blown out through an air inlet of the enrichment pipe; the cleaning steps of the secondary enrichment tube are consistent with the cleaning steps of the enrichment tube 6.
A dehydration tube 4 with the inner wall diameter of 2mm is selected, and the dehydration tube 4 is thin, so that the moisture is fully condensed when the sample gas flows through the dehydration tube 4; the diameter of the inner wall of the enrichment pipe 6 is 5mm, the capacity is large, the sampling volume of the sample gas is increased, the dehydrated sample gas is fully adsorbed by the adsorbent when passing through, and meanwhile, the efficiency is improved; in order to reduce the dead volume of the air inlet pipeline, the diameter of the inner wall of the secondary enrichment pipe is 2 mm.
As shown in fig. 3 and 4, the enrichment tube positioning frame 7 comprises an enrichment tube upper clamping plate 71 and an enrichment tube lower clamping plate 72 with grooves, and the enrichment tube accommodating bin obtained by buckling the grooves of the enrichment tube upper clamping plate and the enrichment tube lower clamping plate is used for accommodating the enrichment tube 6; dehydration pipe locating rack 8 is including taking notched dehydration pipe punch holder 81, dehydration pipe lower plate 82, it is on the dehydration pipe, dehydration pipe holding storehouse that the recess lock of lower plate obtained is used for holding dehydration pipe 4, enriching pipe lower plate 72 and dehydration pipe lower plate 82 lower extreme face scribble silicone grease and the laminating of refrigeration piece 3, the refrigeration piece is through cooling enriching pipe lower plate 72 and dehydration pipe lower plate 82, reach the cooling effect to enriching pipe 6 and dehydration pipe 4, separate with the help of enriching pipe lower plate 72 and dehydration pipe lower plate 82 between refrigeration piece 3 and the heating device simultaneously, refrigeration piece 3 and heating device direct contact have been avoided, protect refrigeration piece 3.
In order to make the cooling plate 3 have better heat dissipation effect and higher refrigeration efficiency, the embodiment is also provided with an air cooling mechanism and a water cooling mechanism, the air cooling mechanism is that a bottom plate 5 which is contacted with the cooling plate 3 for heat conduction is arranged below the cooling plate 3, the lower part of the cooling plate is coated with silicone grease to be tightly attached to the bottom plate 5, a cooling plate 51 is arranged below the bottom plate 5, and one end of the cooling plate 51 is provided with a fan for quickening air circulation and making the cooling plate dissipate heat more quickly; the water cooling mechanism is provided with the cooling coil 52 between the cooling fins, the liquid inlet of the cooling coil 52 is lower than the liquid outlet, the cooling coil 52 can be always in a full liquid state, the heat of the cooling fins 51 is taken away by continuously feeding low-temperature liquid, and the cooling fins 51 are cooled with higher speed by fully absorbing the heat.
The cooling coil 52 comprises a transverse pipeline and a longitudinal pipeline which are in a grid structure, the transverse pipeline is communicated with the longitudinal pipeline, one liquid inlet and one liquid outlet are respectively arranged, the ports of the other pipelines are sealed by plugs 53, the plugs are screwed to prevent leakage when cooling is carried out, and the plugs 53 are disassembled when cleaning is carried out, so that the cooling coil 52 is easier to clean.
Claims (10)
1. The utility model provides a sampling enrichment instrument before VOC detects, includes the controller and by dehumidification module, enrichment and desorption module (1) that set gradually on bottom plate (5) of controller control, its characterized in that: the enrichment and desorption module (1) comprises an enrichment pipe (6), an enrichment pipe positioning frame (7) with an enrichment pipe accommodating bin arranged inside, a heating device of the enrichment pipe (6) and a refrigerating device of the enrichment pipe (6); enrichment pipe (6) and dehumidification module's dehydration pipe (4) intercommunication, enrichment pipe (6) intussuseption be filled with the adsorbent, be provided with control valve (61) on the end pipeline of giving vent to anger of enrichment pipe (6), enrichment pipe (6) and dehydration pipe (4) outer wall all be provided with temperature sensor, temperature sensor's signal output part and the signal input part of controller are connected, the control end of controller is connected with heating device, refrigerating plant's controlled end respectively.
2. A sampling enrichment instrument before VOC detection according to claim 1, wherein: the dehydration module is characterized in that the dehydration tube (4) is fixed by means of a dehydration tube positioning frame (8) with a dehydration tube accommodating cavity, the dehydration tube (4) is arranged in the dehydration tube accommodating cavity, the dehydration tube positioning frame (8) comprises a dehydration tube upper clamping plate (81) with a groove and a dehydration tube lower clamping plate (82), the dehydration tube upper clamping plate (81) and the groove of the dehydration tube lower clamping plate (82) are buckled to form the dehydration tube accommodating cavity, and the dehumidification module further comprises a heating device sleeved outside the dehydration tube (4) and a refrigerating device arranged below the dehydration tube (4); the air outlet of the dewatering pipe (4) is communicated with the air inlet of the enrichment pipe (6) by a pipeline with an electromagnetic valve, and the controlled end of the electromagnetic valve is connected with the control end of the controller.
3. A sampling enrichment instrument before VOC detection according to claim 1, wherein: the enrichment instrument in still include N level enrichment and desorption module (1), N level enrichment and desorption module (1) are with the help of the pipeline of taking the gas circuit valve and the enrichment pipe of enrichment and desorption module (1) give vent to anger the end pipe connection, wherein, N is for being greater than 1 positive integer, N level enrichment and desorption module in contain N-1 enrichment and desorption module (1), enrichment and desorption module (1) are with the help of the pipeline of taking the gas circuit valve end to end connection in proper order.
4. A sampling enrichment instrument before VOC detection according to claim 1, wherein: the enrichment pipe positioning frame (7) comprises an enrichment pipe upper clamping plate (71) and an enrichment pipe lower clamping plate (72) with grooves, and the grooves of the enrichment pipe upper clamping plate (71) and the enrichment pipe lower clamping plate (72) are spliced to form an enrichment pipe accommodating bin.
5. A pre-VOC sample enrichment apparatus as claimed in claim 2 or claim 4, wherein: the refrigerating device comprises a group of refrigerating sheets (3) positioned between a bottom plate (5) and an enrichment pipe lower plate (72)/a dehydration pipe lower plate (82), the lower end surface of each refrigerating sheet (3) is coated with silicone grease to be attached to the bottom plate (5), the upper end surface of each refrigerating sheet (3) is coated with silicone grease to be attached to the enrichment pipe lower plate (72)/the dehydration pipe lower plate (82), and a controlled end of each refrigerating sheet is connected with a control end of a controller.
6. A sampling enrichment instrument before VOC detection according to claim 5, characterized in that: the refrigerating device further comprises an air cooling mechanism, the air cooling mechanism comprises a group of cooling fins (51) which are arranged at the lower end of the bottom plate (5) and attached to the bottom plate (5), and the air outlet faces the cooling fins (51) and is controlled by a controller.
7. A sampling enrichment instrument before VOC detection according to claim 6, characterized in that: the refrigerating plant still include water-cooling mechanism, water-cooling mechanism including set up in cooling fin (51) clearance set up with cooling fin (51) formation can dismantle cooling coil (52) of being connected, the inlet, the liquid outlet of cooling coil (52) all are provided with the solenoid valve that is controlled by the controller.
8. A pre-VOC detection sampling enrichment apparatus as claimed in claim 7, wherein: the cooling coil (52) comprises a transverse pipeline and a longitudinal pipeline which are of a grid structure, the transverse pipeline is communicated with the longitudinal pipeline, one liquid inlet is arranged at each liquid outlet, and the ports of the other pipelines are sealed by plugs (53).
9. A sampling enrichment instrument before VOC detection according to claim 8, wherein: the liquid outlet is higher than the liquid inlet.
10. A sampling enrichment instrument before VOC detection according to claim 1, wherein: the diameter of the inner wall of the dehydration tube (4) is 1-3 mm; the diameter of the inner wall of the enrichment pipe (6) is 1-5 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922215075.2U CN211292275U (en) | 2019-12-12 | 2019-12-12 | Sampling enrichment instrument before VOC detection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922215075.2U CN211292275U (en) | 2019-12-12 | 2019-12-12 | Sampling enrichment instrument before VOC detection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211292275U true CN211292275U (en) | 2020-08-18 |
Family
ID=72015428
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922215075.2U Active CN211292275U (en) | 2019-12-12 | 2019-12-12 | Sampling enrichment instrument before VOC detection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211292275U (en) |
-
2019
- 2019-12-12 CN CN201922215075.2U patent/CN211292275U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103499662B (en) | Sampling analysis device and sampling analysis method for atmosphere volatile organic compounds | |
| CN101609074B (en) | Refrigeration-type purge and trap instrument being applicable to nitric oxide | |
| CN101530821B (en) | Intelligent integrated distillation apparatus | |
| WO2010047490A2 (en) | Air dryer including vortex tube | |
| CN103439153B (en) | Atmosphere volatile organic compound condensation and concentration sampling device and method | |
| CN202141627U (en) | Low-temperature carrier gas cold-trapping and thermal-desorption device | |
| CN105043846A (en) | Volatile organic compound sample gas trapping system and method | |
| CN103852370A (en) | Mobile low-temperature adsorption concentration-thermal desorption device and application method thereof | |
| WO2016029576A1 (en) | Refrigerator | |
| CN104967007A (en) | Dehumidifying apparatus used in ring main unit enclosed space | |
| CN203443939U (en) | Sampling and analyzing device for volatile organic materials in air | |
| CN203443820U (en) | Condensing, concentrating and sampling device for volatile organic materials in air | |
| CN211292275U (en) | Sampling enrichment instrument before VOC detection | |
| CN108760412B (en) | VOCs adsorbs tub sampling device | |
| CN201535592U (en) | Lithium bromide absorption water chilling unit adopting falling film generator | |
| CN203824820U (en) | Mobile low-temperature adsorption concentration-thermal desorption device | |
| CN110243664B (en) | Online enrichment device and application of atmospheric gas phase volatile/semi-volatile organic compounds | |
| CN207396415U (en) | A kind of VOC harvesters and VOC analytical equipments | |
| CN218726967U (en) | Gas preconcentrator | |
| CN202420945U (en) | Pre-processing device for gas | |
| CN202066735U (en) | Automatic translation and lifting type trapping and desorbing device | |
| CN104122350A (en) | Cold trap device for gas chromatography of transformer insulating oil | |
| CN202605995U (en) | Semiconductor refrigerator | |
| CN115436545A (en) | Gas preconcentrator | |
| CN205786046U (en) | A kind of volatile organic matter gas capture devices |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |