CN207181111U - HTHP aerosol sampling system - Google Patents
HTHP aerosol sampling system Download PDFInfo
- Publication number
- CN207181111U CN207181111U CN201720618087.8U CN201720618087U CN207181111U CN 207181111 U CN207181111 U CN 207181111U CN 201720618087 U CN201720618087 U CN 201720618087U CN 207181111 U CN207181111 U CN 207181111U
- Authority
- CN
- China
- Prior art keywords
- sampling
- aerosol
- probe
- gas
- pressure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000005070 sampling Methods 0.000 title claims abstract description 73
- 239000000443 aerosol Substances 0.000 title claims abstract description 47
- 239000000523 sample Substances 0.000 claims abstract description 55
- 238000012546 transfer Methods 0.000 claims abstract description 35
- 239000012528 membrane Substances 0.000 claims abstract description 21
- 230000003189 isokinetic effect Effects 0.000 claims abstract description 19
- 238000010926 purge Methods 0.000 claims abstract description 13
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 239000012530 fluid Substances 0.000 claims 1
- 238000002347 injection Methods 0.000 abstract description 2
- 239000007924 injection Substances 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 44
- 238000005259 measurement Methods 0.000 description 13
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005374 membrane filtration Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 239000000941 radioactive substance Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 235000012773 waffles Nutrition 0.000 description 1
Landscapes
- Sampling And Sample Adjustment (AREA)
Abstract
It the utility model is related to HTHP aerosol sampling system,Along the moving direction identical direction of the transfer gas with transfer gas line formed with isokinetic sampling's probe,Perform to the movement of the first film filter in the transfer gas of isokinetic sampling's probe sampling and sample and measure,It is provided with purge gas injector,For before sampling is started,Maintain to be more than or equal to the pressure of the pressure of transfer gas line from isokinetic sampling's probe to the first film filter in the section injection purge gas moved,Thus the building up inside aerosol in sample probe is prevented,So as to be sampled under high temperature and high pressure environment with the state of pressure and equalized temperature,When starting sampling,Stop the supply of purge gas,Aerosol is in the first film filter and isokinetic sampling's probe to roundabout between the second membrane filter and removed by the first film filter,Probe tube is only filled by transfer gas,Prevent from transferring between gas line and sampling line and pressure differential or temperature difference be present.
Description
Technical field
It the utility model is related to HTHP aerosol sampling system.
Background technology
The system that can be sampled and analyze to aerosol is the utility model is related to, lacking at present can be in HTHP shape
The gasoloid system for being sampled and analyzing under state, the purpose of this utility model are to provide in the case of HTHP
The system that can be measured.
Industrial aerosol device is most of to be applied to the conditions such as normal pressure and temperature, constant-pressure and high-temperature, high normal pressure and temperature, also can not
The commercial plant directly applicable under high-temperature and high-pressure conditions.Therefore, the utility model can under high temperature and high pressure environment to comprising
A variety of aerosols of dust, pollutant and radioactive substance are analyzed, including normal temperature and pressure conditionses and including HTHP bar
Part, to the gas under the extensive environmental condition such as petrol-chemistry engineering, heat energy, iron processed, atomic energy, automobile, air-conditioning telephone-moving filter
Colloidal sol analytical technology provides basic technology.
On the other hand, disclose such as Korean granted patent No. 100145032 " instrument installation and apparatus for aerosol creation" device etc., but also relate to aerosol life at normal temperatures and pressures
Into device, not yet disclose so far on HTHP aerosol generation/injection, mixing, sampling system.
Utility model content
Gasoloid system needs that the flow velocity of sample is adjusted, to make it maintain setting, to be sampled so as to control
Aerosol amount, it is necessary to use consummate measurement apparatus come can be in a variety of position finding particles number concentration, size point
Cloth, mass concentration.
In order to determine the characteristic of aerosol, it is desirable to be able to the device being sampled to sample.Now, give special heed to and sampling
During not cause the characteristic variations of aerosol, this sampling process is referred to as isokinetic sampling (Isokinetic Sampling).
Isokinetic sampling refer to the flow direction of sample probe (Sampling Probe) interior aerosol and speed respectively with main gas in pipe
Sampling process under conditions of the flow direction of colloidal sol and speed are consistent.In the case of non-isokinetic sampling, the gas in sampling process
The characteristic changing of colloidal sol and independently cause wrong measurement result with measurement result afterwards, it is therefore desirable to according to velocity in pipes
The suitably selected sample probe of condition.Also, it is necessary to which noticing prevents aerosol is deposited in for a long time to be exposed to before sampling is started
The inside of the sample probe of main aerosol flow.
In order to the gas included in the transfer gas under the high temperature and high pressure environment comprising air, noncondensable gas and steam
Colloidal sol is sampled, and system and device need to withstand high temperature and high pressure environment, and not influence the reliability of system equipment
Mode design sample system.Furthermore, it is desirable to analyze because the uncertainty occurred the difference of sample time and hot water force condition is come
Confirm and compensate the accuracy of measurement.
The filter of degree of accuracy highest offline mode when aerosol measurement device uses sampling substantially.Also, in order to complete
Kind purpose, a variety of surveys such as optical particle counter, electrostatic low pressure impactor can be connected by sample tap (sampling port)
Measure equipment.Off-line measurement uses the entrance as experiment portion, the membrane filter of the commercial plant exported.However, most of work
The scope of application of industry device is limited, therefore is difficult to directly be applicable under the high temperature and high pressure environment comprising steam.Therefore, it is necessary to pre-treatment
Device and after-treatment device, to be applicable commercial plant.It is molten as the gas of off-line measurement device that Fig. 1 is shown with membrane filter
Glue sampling system.
In order to reach purpose as described above, the utility model provides the aerosol sampling to be worked under high temperature and high pressure environment
System, along the moving direction identical direction of the transfer gas with transfer gas line 1 formed with isokinetic sampling's probe 2,
The transfer gas that isokinetic sampling's probe 2 samples moves to the first film filter 7 and performs sampling and measurement, is provided with purging and uses
Air injector 4, for before sampling is started, in the section moved from isokinetic sampling's probe 2 to the first film filter 7
Purge gas is injected to maintain to be more than or equal to the pressure of the pressure of transfer gas line, is thus prevented in sample probe
Aerosol is accumulated in portion, so as to be sampled under high temperature and high pressure environment with the state of pressure and equalized temperature, when starting sampling, stops
The only supply of purge gas, aerosol is between the first film filter 7 and isokinetic sampling's probe 2 to the second membrane filter
5 is roundabout and removed by the first film filter 5, and probe tube is only filled by transfer gas, prevents from transferring gas line and probe tube
Pressure differential or temperature difference between line be present.
To being heated from isokinetic sampling's probe 2 to the section of the first film filter to reach with transferring gas line phase
Same temperature.
It can be depressurized by the gas sampled of the first film filter 7 by critical hole 8, pass through the sampling gas of critical hole
Body is removed heat by heat exchanger 11, and steam is condensed and sampled in displacement can 12.
Enable aerosol roundabout by the forward direction needle-valve 9 of critical hole 8, thus allow for pressure regulation.
The gas sampled that steam is removed can be made to be set by thermal mass flow meter in the front end of thermal mass flow meter 15
It is equipped with water-separator.
In the end of thermal mass flow meter formed with vacuum tank and vavuum pump, flowed into so as to control to sample probe
Transfer gas flow.
In the filter mounting of membrane filter is provided with, in order that the transfer loss amount of aerosol minimizes, from mistake
The entrance of filter holder forms laminar flow to the section of membrane filter in conical structure.
By utility model as described above, can be sampled under high temperature and high pressure environment.
Brief description of the drawings
Fig. 1 is the accompanying drawing for showing aerosol measurement device under HTHP line of the present utility model.
Fig. 2 is the accompanying drawing for showing the filter mounting of aerosol measurement device under HTHP line of the present utility model.
Fig. 3 is show the orifice plate support of aerosol measurement device and critical hole under HTHP line of the present utility model attached
Figure.
Embodiment
Hereinafter, embodiment of the present utility model is described in detail referring to the drawings.Fig. 1 is to show height of the present utility model
The accompanying drawing of aerosol measurement device under warm high-voltage line.
HTHP sampling system needs to maintain high temperature and condition of high voltage at the time of sampling terminates and is sampling end
Suitably temperature and pressure is turned down to discharge.Also, equipment and system are required to maintain stable function in high temperature and high pressure.For
This, makes temperature as defined in system maintenance, sampling using heater to being heated from isokinetic sampling's probe 2 to the rear end of critical hole 8
The gas sampled of end is removed water by orifice plate 8, needle-valve 9, heat exchanger 11 and condensate water pot 12, water-separator 14
Divide and reduce pressure and temperature, so as to be released to the outside of system.Membrane filter 5,7 uses can withstand HTHP
The support of special manufacture, and use plate to prevent membrane filter impaired.Now, membrane filter may be easily replaceable for
Filter needed for ceramic filter, capillary filter etc..Also, temperature drastically is prevented during in order to be sampled in the early stage
And pressure change and being formed with transfer gas balances, and membrane filter is arranged at roundabout pipeline to use.
Transfer gas to transfer to sampler by isokinetic sampling's probe 2, transfer the stream of gas line 1 and sampling line
Speed maintains identical flow velocity.In order that the flow velocity of transfer gas and sampling line maintains identical flow velocity, vavuum pump 17 can be used
And vacuum tank 16 adjusts sampling velocity.Now, according to using gas, needle-valve 9 and critical hole can be used, be air in transfer gas
Or in the case of the noncondensable gas such as nitrogen, needle-valve can be used come end pressure after adjusting, thus maintain as defined in sampling velocity, moving
End pressure after body of supplying gas is adjusted comprising in the case of steam, critical hole can be used.The transfer gas of sampling passes through mass flow
Meter 3 and thermal mass flow meter 15 determine the mass flow of air, nitrogen, steam and its mixture and volume flow, as energy
The means of enough compensation aerosol loss amount caused by the current difference of transfer gas line and sampling line.
Purge gas (purge gas) injector 4, micro air or nitrogen are injected to the inside of sample probe to tie up
The pressure of the pressure more than or equal to transfer gas line is held, prevents the aerosol long-time heap before the sampling of aerosol is started
Product is in the inside of the sample probe for the flowing for being exposed to aerosol.Also, in order to maintain and transfer gas line identical temperature
And having heaters is set, so as to prevent the loss of the aerosol caused by thermal diffusion and condensation in advance.Also, in order to needing
The aerosol mouth for the high concentration to be diluted measures the regulation of time, and purge gas injector can perform diluter simultaneously
Effect.
Afterwards, if starting to sample, the supply of purge gas is stopped, aerosol passes through the second membrane filter 5.Start
After sampling, filled first with by the second membrane filter and the transfer gas that aerosol is removed completely in probe tube
Portion, so as to when starting sampling, be opened after pressure and the equalized temperature between transfer gas line and sampling line is maintained
Begin to sample.Thus the sampling drastically caused by the pressure differential of transfer gas line and sampling line is prevented, and is prevented because of temperature
Poor and aerosol is attached to the thermal diffusion phenomenon of the inside of probe tube.
The sampling system for reaching pressure/heat balance performs sampling and measurement by the first film filter 7.The first film mistake
Filter, the second membrane filter connect by flexible pipe (Flexible tube) 6 and are easy to dismount.Filtered by the first film
The gas sampled of device is decompressed to defined pressure by critical hole 8, can be by being arranged at the differential pressure of the front end of critical hole, rear end
Table 10 determines the flow velocity that differential pressure value and indirect determination include the gas sampled of steam.Also, pass through critical hole or the height of needle-valve
The gas sampled of temperature is removed heat by heat exchanger 11, in the case of comprising steam, steam be condensate in displacement can 12 and
It is sampled, the condensed water of sampling measures condensation number by draining valve 13.Thus, it is possible to determine accurate flow, and provide energy
Probabilistic means of measuring appliance used in enough compensation.Also, regulating valve is come can be by rear end in a manner of by needle-valve 9
Pressure is adjusted to arbitrary extent.Now, in order to ensure the performance of thermal mass flow meter 15, and water-separator 14 is set to prevent
The inflow of the steam only condensed.
The vacuum tank 16 and vavuum pump 17 being connected with the rear end of membrane filter can control the shifting flowed into sample probe
Supply gas the flow of body.
Fig. 2 illustrates the ability to withstand the filter mounting 18 of high-temperature and high-pressure conditions.Filter mounting is set along vertical direction
Sampling system is placed in, the minimization of loss of aerosol for being deposited in membrane filter is made during separating after sampling.Also,
The top or bottom of filter mounting are fixed by clip, so as to also be readily able to separation in system operation to change membrane filtration
Device.In order that the transfer loss and aggegation of aerosol minimize, and the inside tool of the filter mounting of membrane filter is installed
The conical structure of laminar flow can be formed by having.Now, in order to prevent membrane filter to be damaged under elevated pressure conditions, and can perforate
Membrane filter is fixed to maintain stable sampling in the top of plate 20 and waffle slab 21.Teflon ring 19 to tie up under elevated pressure conditions
Hold air-tightness and prevent the mode of the pressure loss from manufacturing.
Fig. 3 illustrates the ability to the orifice plate support 22 used under high-temperature and high-pressure conditions and critical hole 8.Critical orifice plate is fixed on hole
Board mount 8, it is easy to the critical orifice plate of size of the dismounting with required orifice plate.Therefore, can be by changing orifice plate come regulating orifice plate
Rear end pressure, the front end of orifice plate, rear end pressure differential exceed prescribed limit in the case of, choked flow (Chocked can be passed through
Flow) sampling velocity is maintained.
Claims (4)
- A kind of 1. HTHP aerosol sampling system, it is characterised in thatAlong the moving direction identical direction of the transfer gas with transfer gas line formed with isokinetic sampling's probe, in constant speed The transfer gas of sample probe sampling is mobile to the first film filter and performs and samples and measure,Purge gas injector is provided with, for before sampling is started, being filtered from isokinetic sampling's probe to the first film Purge gas is injected to maintain to be more than or equal to the pressure of the pressure of transfer gas line in the section of device movement, thus prevents The building up inside aerosol of sample probe, so as to be sampled under high temperature and high pressure environment with the state of pressure and equalized temperature,When starting sampling, stop the supply of purge gas, aerosol is between the first film filter and isokinetic sampling's probe Roundabout to the second membrane filter and removed by the first film filter, probe tube is only filled by transfer gas, prevents from transferring gas Pressure differential or temperature difference between fluid line and sampling line be present,Reach to being heated from isokinetic sampling's probe to the section of the first film filter and transfer gas line identical Temperature,It is depressurized by the gas sampled of the first film filter by critical hole, by the gas sampled of critical hole by heat Exchanger and be removed heat, steam is condensed and sampled in displacement can,Enable aerosol roundabout by the forward direction needle-valve of critical hole, thus allow for pressure regulation.
- 2. HTHP according to claim 1 aerosol sampling system, it is characterised in that make what steam was removed to take Sample gas is provided with water-separator by thermal mass flow meter in the front end of thermal mass flow meter.
- 3. HTHP according to claim 2 aerosol sampling system, it is characterised in that in thermal mass flow meter End formed with vacuum tank and vavuum pump, so as to control the flow of the transfer gas flowed into sample probe.
- 4. HTHP according to any one of claim 1 to 3 aerosol sampling system, it is characterised in that pacifying In filter mounting equipped with membrane filter, in order that the transfer loss amount of aerosol minimizes, from entering for filter mounting Mouth forms laminar flow to the section of membrane filter in conical structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720618087.8U CN207181111U (en) | 2017-05-31 | 2017-05-31 | HTHP aerosol sampling system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720618087.8U CN207181111U (en) | 2017-05-31 | 2017-05-31 | HTHP aerosol sampling system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207181111U true CN207181111U (en) | 2018-04-03 |
Family
ID=61734659
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720618087.8U Expired - Fee Related CN207181111U (en) | 2017-05-31 | 2017-05-31 | HTHP aerosol sampling system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207181111U (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109855925A (en) * | 2019-03-04 | 2019-06-07 | 上海交通大学 | The high vapour concentration aerosol on-line measurement device of the high temperature and pressure of bandgap calibration function |
| CN109855924A (en) * | 2019-03-04 | 2019-06-07 | 上海交通大学 | The on-line detecting system of harsh environment aerosol |
| CN111781014A (en) * | 2020-06-26 | 2020-10-16 | 西安交通大学 | Online sampling system and method based on supercritical water oxidation technology |
| CN112816378A (en) * | 2020-12-31 | 2021-05-18 | 上海交通大学 | Real-time online measurement method for obtaining aerosol concentration based on turbidimeter |
| CN112826132A (en) * | 2019-11-22 | 2021-05-25 | 常州市派腾电子技术服务有限公司 | Liquid guide piece, atomizing core, atomizer and aerosol generating system |
| CN113125212A (en) * | 2021-04-15 | 2021-07-16 | 哈尔滨工程大学 | Aerosol sampling pretreatment system suitable for closed space fire condition |
| CN113188852A (en) * | 2021-04-28 | 2021-07-30 | 哈尔滨工程大学 | Sampling and measuring device for micro-nano aerosol in different environments |
| CN113654851A (en) * | 2021-07-20 | 2021-11-16 | 哈尔滨工程大学 | Device and method for sampling aerosol in containment vessel under severe accident condition |
| CN115032123A (en) * | 2022-03-21 | 2022-09-09 | 哈尔滨工程大学 | Experimental device for studying aerosol deposition characteristics in pipelines under different thermal conditions |
| ES2963026A1 (en) * | 2023-06-30 | 2024-03-22 | Centro De Investig Energeticas Medioambientales Y Tecnologicas Ciemat | Chamber for continuous and simultaneous subsampling of aerosols from stationary or transient confined flows (Machine-translation by Google Translate, not legally binding) |
-
2017
- 2017-05-31 CN CN201720618087.8U patent/CN207181111U/en not_active Expired - Fee Related
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109855925B (en) * | 2019-03-04 | 2021-07-30 | 上海交通大学 | High-temperature high-pressure high-steam concentration aerosol on-line measuring device with calibration function |
| CN109855924A (en) * | 2019-03-04 | 2019-06-07 | 上海交通大学 | The on-line detecting system of harsh environment aerosol |
| CN109855925A (en) * | 2019-03-04 | 2019-06-07 | 上海交通大学 | The high vapour concentration aerosol on-line measurement device of the high temperature and pressure of bandgap calibration function |
| CN109855924B (en) * | 2019-03-04 | 2021-07-30 | 上海交通大学 | On-line detection system for severe environment aerosol |
| CN112826132A (en) * | 2019-11-22 | 2021-05-25 | 常州市派腾电子技术服务有限公司 | Liquid guide piece, atomizing core, atomizer and aerosol generating system |
| CN111781014A (en) * | 2020-06-26 | 2020-10-16 | 西安交通大学 | Online sampling system and method based on supercritical water oxidation technology |
| CN112816378A (en) * | 2020-12-31 | 2021-05-18 | 上海交通大学 | Real-time online measurement method for obtaining aerosol concentration based on turbidimeter |
| CN112816378B (en) * | 2020-12-31 | 2021-09-14 | 上海交通大学 | Real-time online measurement method for obtaining aerosol concentration based on turbidimeter |
| CN113125212A (en) * | 2021-04-15 | 2021-07-16 | 哈尔滨工程大学 | Aerosol sampling pretreatment system suitable for closed space fire condition |
| CN113188852A (en) * | 2021-04-28 | 2021-07-30 | 哈尔滨工程大学 | Sampling and measuring device for micro-nano aerosol in different environments |
| CN113654851A (en) * | 2021-07-20 | 2021-11-16 | 哈尔滨工程大学 | Device and method for sampling aerosol in containment vessel under severe accident condition |
| CN113654851B (en) * | 2021-07-20 | 2023-12-19 | 哈尔滨工程大学 | Device and method for sampling aerosol in containment under severe accident condition |
| CN115032123A (en) * | 2022-03-21 | 2022-09-09 | 哈尔滨工程大学 | Experimental device for studying aerosol deposition characteristics in pipelines under different thermal conditions |
| ES2963026A1 (en) * | 2023-06-30 | 2024-03-22 | Centro De Investig Energeticas Medioambientales Y Tecnologicas Ciemat | Chamber for continuous and simultaneous subsampling of aerosols from stationary or transient confined flows (Machine-translation by Google Translate, not legally binding) |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN207181111U (en) | HTHP aerosol sampling system | |
| US20170268964A1 (en) | Aerosol sampling system operating at high temperature and pressure | |
| CN106770951B (en) | Super low concentration smoke on-line monitoring system and analysis method | |
| CN100367456C (en) | Apparatus for controlling flow rate of gases used in semiconductor device by differencial pressure | |
| GB2431010A (en) | Method and system for conditioning a multiphase fluid stream | |
| US4738147A (en) | Low flow sampling and analysis system | |
| AU2006262199A1 (en) | Mass velocity and area weighted averaging fluid composition sampler and mass flow meter | |
| EP2390643A1 (en) | Leak test probe for use in industrial facilities | |
| CN111337598B (en) | Trace detection device | |
| CN102967491A (en) | Particle matter sampling device and method for particle matter detection using device | |
| CN106769667B (en) | Nanoscale gas flow rule experiment system and method | |
| CN111122407A (en) | Testing device and testing method for measuring filtering efficiency of air filtering material | |
| US7665375B2 (en) | Flow splitter for a solid particle counting system | |
| JP2023030159A (en) | Pressure control system | |
| CN113188852A (en) | Sampling and measuring device for micro-nano aerosol in different environments | |
| CN103471876A (en) | Dilution sampling probe | |
| CN209624313U (en) | Permeability analyzer suitable for micro- gas permeable material | |
| CN101568819A (en) | Systems and methods for measurement and analysis of pipeline contaminants | |
| KR101881345B1 (en) | Gas sampling in controlled volume apparatus for mixture gas | |
| CN105716692B (en) | A kind of commutator and detection method for gas flow standard device | |
| US3690146A (en) | Device for metering a particular quantity of fluid | |
| CN113252529A (en) | High-temperature gas-driven penetration testing system and method for metal pipe fitting | |
| CN216433190U (en) | Portable gas micro-flow calibration device | |
| CN219016235U (en) | Device for detecting content of liquid in hydrogen | |
| CN214408773U (en) | Local heat release rate measurement system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180403 |