CN102323111A - Method for sampling ultrahigh flow aerosol and sampler - Google Patents
Method for sampling ultrahigh flow aerosol and sampler Download PDFInfo
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- CN102323111A CN102323111A CN201110233070A CN201110233070A CN102323111A CN 102323111 A CN102323111 A CN 102323111A CN 201110233070 A CN201110233070 A CN 201110233070A CN 201110233070 A CN201110233070 A CN 201110233070A CN 102323111 A CN102323111 A CN 102323111A
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Abstract
The invention relates to a method for sampling ultrahigh flow aerosol and a sampler. The sampling method comprises the following steps of: pumping gas containing aerosol particles into the sampler; making the gas flow toward a collecting groove after being sprayed through a nozzle; and deviating the gas flow through the collecting groove, wherein particles with large particle diameters are collected onto a non-woven fabric of the collecting groove, and particles with small particle diameters move along with fluid along a flow line and are collected by a filtering material arranged below the collecting groove. In the invention, an impactor is adopted for capturing larger particles, and the pressure resistance on the filtering material is reduced, so that a vacuum pump with low power can be used, and the size and the weight of the sampler are reduced fundamentally. The invention further provides a method for reducing the pressure resistance of the filtering material by performing factional sampling with the impactor. An ultrahigh flow aerosol sampler which is detachable and is convenient to move is researched and developed by applying the method.
Description
Technical field
The invention belongs to enviromental monitoring equipment, be specifically related to a kind of sampling thief that is used for the sampling of super-flow atmospheric aerosol.
Background technology
Atmospheric aerosol is the main form of a lot of pollutants in the atmosphere, and health is had a lot of adverse effects, is one of object of paying close attention in environmental monitoring and the research, and atmosphere environment supervision generally to its sampling enrichment, is measured wherein each components contents then.Because pollutant levels are widely different in the environment, therefore need different sampling flows to carry out enrichment.According to the technical requirement (sampling thief technical requirement of HJ/T374-2007 overall suspended pellet and detection method) of Environmental Protection Administration's issue, sampling thief is divided into middle traffic sampling device (working point flow 6m by flow
3/ h) with big traffic sampling device (working point flow 63m
3/ h), TH-1000C type and Qingdao Lao that domestic big traffic sampling device commercially available prod mainly contains Tianhong Intelligent Indstrument Factory, Wuhan City answer 2031 types etc.If pollutant levels to be measured are lower, such as radioactive nuclide in the atmosphere, the flow that then need use is greater than 450m
3The sampling thief of/h.This type of sampling thief does not still have unified address at present, for ease of distinguishing mutually with existing sampling thief, is called the super-flow aerosol sampler.Similar with the sampling thief than low discharge, the super-flow aerosol sampler also adopts filter method to capture gasoloid, but needs the bigger vacuum pump or fan of suction flow as sampling power, the also corresponding increase of the area of filter material.
Disclosed Chinese patent integrated super-flow automatic sampler of in January, 2010 (201010104439.0) discloses a kind of super-flow sampling thief; Adopt vacuum blower to connect admission line and outlet pipe; The entrance point of admission line connects atmospheric aerosol sampling cabin; Sampling is provided with air deflector, filter material cabin in the cabin, and filter material is installed on the through hole of filter material Ceiling.The problem of its existence is; The one, because seasonal Atmospheric particulates severe contamination situation can appear at present domestic a lot of area, usually can cause filter material and stop up, the sample volume of sample can not meet the demands; And to overcome this situation; The more powerful aspiration pump of general use not only increases the volume and weight of sampling thief, and increases energy consumption.Two are to use powerful aspiration pump, cause the volume and weight of sampling thief bigger, generally can only fixedly mount, and are difficult to change sampling spot, influence its monitoring range.What cause the problems referred to above is that the resistance of filter material is bigger in taking a sample at all.
Summary of the invention
The present invention proposes and a kind ofly carry out factional sampling reducing the method for filter material pressure drag, and use it and researched and developed a kind of detachable, super-flow aerosol sampler of being convenient to move with ram.
Solution of the present invention is:
A kind of super-flow sampling of aerosol method may further comprise the steps:
1] gas that contains aerosol particle is drawn into sampling thief;
2] gas flows to the feeder of nozzle after a plurality of nozzle ejection;
3] feeder deflects air-flow, and the particle that particle diameter is bigger is collected on the nonwoven fabrics of feeder, and particle diameter smaller particles thing is followed the motion of fluid longshore current line, is collected the filter material collection that the groove below is provided with.
A kind of super-flow aerosol sampler; Its special character is: comprise sampling line casing, power box, be arranged on sampling line casing interior inlet channel and filter material, be arranged on the aspiration pump in the power box; Said sampling line casing is connected with the power box upper-lower seal, and said aspiration pump is installed in the bottom of inlet channel, and the inlet channel porch is provided with ram; Said ram comprises the waveform upper plate and a plurality of feeders of the interior dress nonwoven fabrics that below upper plate, is provided with; The trough place of said upper plate is provided with a plurality of long and narrow seam nozzles, said feeder be arranged on corresponding long and narrow seam nozzle under, described filter material is installed in the below of feeder.
Above-mentioned waveform upper plate trough spacing is 30cm～35cm, and the trough angle is 90 °～100 °.
Above-mentioned inlet channel comprises hydraucone and the transition section that is arranged on the hydraucone bottom, and said hydraucone larger diameter end is connected with the ram body seal, and hydraucone smaller diameter end and transition section are tightly connected.
The seam of above-mentioned long and narrow seam nozzle is wide to be 1～3mm.
Above-mentioned inlet channel top is provided with and prevents that rainwater from drenching the detachable wind cap into inlet channel.
The air intake opening of above-mentioned aspiration pump is connected with the transition section of inlet channel is straight-through through flexible pipe up; The gas outlet of said aspiration pump is arranged on the side of sampling thief, draws the sampling thief sidewall through pipeline.
The transition section middle part of above-mentioned inlet channel is provided with flowmeter; The sampling thief below is equipped with runner.
Advantage of the present invention is:
1, the ram upper plate adopts the wave structure, can significantly reduce the aerocolloidal loss of upper plate, and the gasoloid quality that the actual measurement upper plate captures is not more than 5%.Nozzle stitches the big and easy blocking of the resistance of wide too small then ram own, and is wide then relatively poor to the capture effect of larger particles, is advisable with 1～3mm.Place nonwoven fabrics in the feeder, can effectively stop the bounce-back of particle, also be convenient to sample collection.
2, the present invention adopts ram to capture larger particles, has reduced the pressure drag on the filter material, therefore can use the vacuum pump of smaller power, thereby fundamentally reduce the volume and weight of sampling thief.
3, the inlet channel top is provided with dismountable blast cap, is used to prevent that rainwater from drenching into sampling thief inside.
4, sampling thief transition section middle part is provided with flowmeter, is convenient to flow measurement and concentration and calculates.
5, the sampling thief below is equipped with runner, is convenient to move the replacing place.
6, the air intake opening of aspiration pump is connected through flexible pipe and transition section are straight-through up, can reduce the pressure loss of bringing because of pipe bending.
Description of drawings
Fig. 1 is the ram structural representation;
Fig. 2 is split type aerosol sampler structural representation;
Reference numeral is following: 1-waveform upper plate, 2-nozzle, 3-feeder, 4-nonwoven fabrics, 5-filter material, 6-filter material frame; The 7-blast cap, 8-hydraucone, 9-flowmeter, 10-transition section, 11-pressure transducer, 12-temperature sensor; The 13-frequency converter, 14-electric cabinet, 15-integrating instrument, 16-flange, 17-flexible pipe, 18-aspiration pump; The 19-radiator fan, 20-support, 21-runner, 22-sampling line casing, 23-power box.
Embodiment
As depicted in figs. 1 and 2, super large aerosol sampler main body comprises that blast cap 7, sampling line casing 22 and power box 23, three parts are all detachable, can be used as sampling thief during one and uses, and can take apart when needing transportation.Blast cap 7 is that four blocks of plates are assembled, can take apart when needing to be convenient to transportation.Blast cap 7 is located at directly over the sampling line casing 22; Be connected with the bushing type bolt between the sampling line casing 22, there are loose-leaf and latch mechanism in the bolt top, sampling line casing 22 four sides door-plates are detachable; Convenient transportation and maintenance; Sampling line casing 22 air intake openings are provided with ram, and ram comprises waveform upper plate 1 and a plurality of feeders 3 of the interior dress nonwoven fabrics 4 that below upper plate 1, is provided with, and nonwoven fabrics is used to collect larger particles; The trough place of upper plate 1 is provided with a plurality of long and narrow seam nozzles 2, feeder 3 be arranged on corresponding long and narrow seam nozzle 2 under, ram below is provided with filter material frame 6; Filter material 5 is installed on the filter material frame 6, and filter material frame 6 belows connect hydraucone 8, and hydraucone 8 belows connect transition section 10; Be connected with bolt between sampling line casing 22 and the power box 23, pipeline connects with flange 16, and circuit connects with the cable switching; Four side door plates of power box 23 are detachable, and convenient transportation and maintenance are equipped with radiator fan 19 on symmetrical two door-plates; Mainly be provided with aspiration pump 18 in the power box 23, aspiration pump 18 is connected with flexible pipe 17 with sampling line, and power box 23 belows are provided with support 20; Support 20 is telescopic, is retracted to during transportation under the power box, can open during sampling; Support sampling thief, power box 23 bases below is equipped with runner 21 for four jiaos, makes things convenient for sampling thief to move.
The waveform upper plate 1 trough spacing of ram is 34cm, and the trough angle is 98 °, and ram nozzle 2 slit widths are 2mm.
Be provided with flowmeter 9 and pressure transducer 11 and temperature sensor 12 in the transition section 10; Be provided with frequency converter 13 and electric cabinet 14 in the sampling line casing 21; Be provided with integrating instrument 15 and power switch in the electric cabinet 14, connect with electric wire between flowmeter 9, pressure transducer 11, temperature sensor 12, frequency converter 13 and the integrating instrument 15.
Its course of work is: split type sampling thief is installed by mode from bottom to top; Open general supply successively, integrating instrument power supply, radiator fan power supply, converter power supply are provided with integrating instrument parameter and converter parameter; Start vacuum pump; Instrument gets into sample states, and flowmeter, pressure transducer, temperature sensor are monitored flow, pressure and temperature variation in real time, and transmit signals to flow integrator; By flow integrator data on flows is fed back to frequency converter in real time, frequency converter comes Control Flow through the frequency of regulating vacuum pump.
Ram divides upper plate 1 and feeder 3, and upper plate is the wave structure, and nozzle stitches 2 wide 1～3mm.Place nonwoven fabrics in the feeder 3, feeder is installed on the frame, and filter material 5 is installed between frame and the filter material frame.Gasoloid is behind nozzle 2; Air-flow points to feeder 3, and feeder deflects fluid, and the particle that particle diameter is bigger can not be followed streamline deflection and impinged upon on the nonwoven fabrics of feeder 4; Particle diameter smaller particles thing is followed the motion of fluid longshore current line, is finally collected by filter material 5.Upper plate 1 positive triangular structure is unfavorable for the deposition of particle; Simultaneously, particle with airflow strikes to nonwoven fabrics time part can upwards rebound, Wave-shaped structural has increased the distance of nonwoven surface to upper plate; Particle is difficult for rebounding to lower surface, and then effectively reduces the plate loss.Can effectively stop bounce-back with placing nonwoven fabrics in the feeder, simultaneously the particle of greater particle size collected, not only can reduce the pressure drag of filter material but also reached the effect of collecting fully.
Blast cap 7 is that four blocks of plates are assembled, adopts two triangles and two trapezoidal plates in this example, and panel edges is welded with short pipe section, and mutual two boards staggers in the pipe section of connecting portion each other.Insert with latch during installation, and fixing.After being combined into blast cap,, protect with special adhesive tape in the junction for preventing roof leaking.
The flow velocity formula is adopted in flow measurement, and flowmeter 9 uses even speed tube in this example, through measuring dynamic pressure and the static pressure in the even speed tube, according to the parameter of prior demarcation, can calculate flow in real time through flow integrator.
In the system design,, adopt aspiration pump 18 vertical installations, behind the flow rate test pipeline, be connected to aspiration pump with the flexible pipe transition for keeping the stable of sampling thief and reducing the bend pipe that brings the pressure loss.Gas outlet is 90 ° of circular arc bend pipes.
Move for ease, universal wheel is installed in the sampling thief bottom, after confirming the sample position, uses folding bracket to fix.
Split process:
1, blast cap 7 is taken off, extract the connection latch between each sheet, be divided into four, put into packing case.
2, open the side panel of sampling line casing 16, unclamp the bolt of the terminal flange of flow measurement pipeline section, unplug cable connector, and fixing respectively.
3, pull down the coupling bolt of sampling line casing 16 and power box 17.
4, take off sampling line casing 16, the packing case of packing into.
5, the support with power box 17 bottoms turns back, with the power box packing case of packing into.
6, installation process is the inverse process of said process.
Claims (8)
1. super-flow sampling of aerosol method is characterized in that: may further comprise the steps:
1] gas that contains aerosol particle is drawn into sampling thief;
2] gas flows to the feeder of nozzle after a plurality of nozzle ejection;
3] feeder deflects air-flow, and the particle that particle diameter is bigger is collected on the nonwoven fabrics of feeder, and particle diameter smaller particles thing is followed the motion of fluid longshore current line, is collected the filter material collection that the groove below is provided with.
2. super-flow aerosol sampler; It is characterized in that: comprise sampling line casing, power box, be arranged on sampling line casing interior inlet channel and filter material, be arranged on the aspiration pump in the power box; Said sampling line casing is connected with the power box upper-lower seal, and said aspiration pump is installed in the bottom of inlet channel, and the inlet channel porch is provided with ram; Said ram comprises the waveform upper plate and a plurality of feeders of the interior dress nonwoven fabrics that below upper plate, is provided with; The trough place of said upper plate is provided with a plurality of long and narrow seam nozzles, said feeder be arranged on corresponding long and narrow seam nozzle under, described filter material is installed in the below of feeder.
3. super-flow aerosol sampler according to claim 2 is characterized in that: said waveform upper plate trough spacing is 30cm～35cm, and the trough angle is 90 °～100 °.
4. according to claim 2 or 3 described super-flow aerosol samplers; It is characterized in that: said inlet channel comprises hydraucone and the transition section that is arranged on the hydraucone bottom; Said hydraucone larger diameter end is connected with the ram body seal, and hydraucone smaller diameter end and transition section are tightly connected.
5. super-flow aerosol sampler according to claim 4 is characterized in that: the wide 1～3mm of being of the seam of said long and narrow seam nozzle.
6. super-flow aerosol sampler according to claim 4 is characterized in that: described inlet channel top is provided with and prevents that rainwater from drenching the detachable wind cap into inlet channel.
7. super-flow aerosol sampler according to claim 4 is characterized in that: the air intake opening of said aspiration pump is connected with the transition section of inlet channel is straight-through through flexible pipe up; The gas outlet of said aspiration pump is arranged on the side of sampling thief, draws the sampling thief sidewall through pipeline.
8. super-flow aerosol sampler according to claim 4 is characterized in that: the transition section middle part of said inlet channel is provided with flowmeter; The sampling thief below is equipped with runner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110233070A CN102323111A (en) | 2011-08-15 | 2011-08-15 | Method for sampling ultrahigh flow aerosol and sampler |
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| CN201110233070A CN102323111A (en) | 2011-08-15 | 2011-08-15 | Method for sampling ultrahigh flow aerosol and sampler |
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| CN102323111A true CN102323111A (en) | 2012-01-18 |
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| CN201110233070A Pending CN102323111A (en) | 2011-08-15 | 2011-08-15 | Method for sampling ultrahigh flow aerosol and sampler |
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Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102680288A (en) * | 2012-06-12 | 2012-09-19 | 东莞理工学院 | Inertia fiber filter membrane device for grading particles |
| CN104655457A (en) * | 2015-03-03 | 2015-05-27 | 武汉大学 | Vacuum sampler for gas spectrum analysis |
| CN105938062A (en) * | 2016-06-16 | 2016-09-14 | 北京放射性核素实验室 | Stereo sampling cabin for extra-large flow aerosol sampler |
| CN106066267A (en) * | 2016-06-16 | 2016-11-02 | 北京放射性核素实验室 | Sampling ultrahigh flow aerosol device |
| CN106680155A (en) * | 2015-11-09 | 2017-05-17 | 无锡中衡环境科技有限公司 | Particulate matter management monitoring device |
| CN107219099A (en) * | 2017-05-19 | 2017-09-29 | 亿信标准认证集团有限公司 | A kind of fume continuous automatic monitoring and control device |
| CN107228783A (en) * | 2017-05-19 | 2017-10-03 | 亿信标准认证集团有限公司 | A kind of atmospheric aerosol harvester |
| US9915600B2 (en) | 2016-02-19 | 2018-03-13 | Research Triangle Institute | Devices, systems and methods for detecting particles |
| CN109406354A (en) * | 2017-08-15 | 2019-03-01 | 财团法人交大思源基金会 | Inertial impactor with wetted impact surface to prevent particle loading effects |
| CN109490935A (en) * | 2018-11-12 | 2019-03-19 | 西北核技术研究所 | The filter sample γ measurement source method and device extracted based on particulate matter |
| US10345216B2 (en) | 2014-08-20 | 2019-07-09 | Research Triangle Institute | Systems, devices, and methods for flow control and sample monitoring control |
| CN110082166A (en) * | 2018-01-25 | 2019-08-02 | 北京方鸿智能科技有限公司 | Full-automatic radioactivity sampling of aerosol measuring and analysis system |
| CN111372524A (en) * | 2017-09-12 | 2020-07-03 | 纽卡斯尔诺森比亚大学 | Impact sampler for aerosol component collection |
| US11047787B2 (en) | 2019-04-29 | 2021-06-29 | Research Triangle Institute | And method for optical bench for detecting particles |
| CN113447322A (en) * | 2021-05-20 | 2021-09-28 | 西北核技术研究所 | Low-energy-consumption aerosol sampling device on aircraft, particularly rotor wing unmanned aerial vehicle, and aircraft |
| CN113865945A (en) * | 2021-09-22 | 2021-12-31 | 大连理工大学 | Unpowered hood type passive sampling device for semi-volatile organic compounds and using method thereof |
| CN114018655A (en) * | 2021-09-26 | 2022-02-08 | 苏州尚科洁净技术有限公司 | Fast disassembling structure of impactor |
| CN114544272A (en) * | 2022-02-11 | 2022-05-27 | 北京大学 | Cyclone type sand-dust aerosol grading sampling device, method and application |
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Cited By (27)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102680288A (en) * | 2012-06-12 | 2012-09-19 | 东莞理工学院 | Inertia fiber filter membrane device for grading particles |
| US10481070B2 (en) | 2014-08-20 | 2019-11-19 | Research Triangle Institute | Systems, devices, and methods for flow control and sample monitoring control |
| US10018551B2 (en) | 2014-08-20 | 2018-07-10 | Research Triangle Institute | Devices, systems and methods for detecting particles |
| US10345216B2 (en) | 2014-08-20 | 2019-07-09 | Research Triangle Institute | Systems, devices, and methods for flow control and sample monitoring control |
| CN104655457B (en) * | 2015-03-03 | 2019-05-24 | 武汉大学 | A kind of spectrochemical analysis for gases vacuum core sampler |
| CN104655457A (en) * | 2015-03-03 | 2015-05-27 | 武汉大学 | Vacuum sampler for gas spectrum analysis |
| CN106680155A (en) * | 2015-11-09 | 2017-05-17 | 无锡中衡环境科技有限公司 | Particulate matter management monitoring device |
| US9915600B2 (en) | 2016-02-19 | 2018-03-13 | Research Triangle Institute | Devices, systems and methods for detecting particles |
| CN105938062A (en) * | 2016-06-16 | 2016-09-14 | 北京放射性核素实验室 | Stereo sampling cabin for extra-large flow aerosol sampler |
| CN106066267A (en) * | 2016-06-16 | 2016-11-02 | 北京放射性核素实验室 | Sampling ultrahigh flow aerosol device |
| CN107228783A (en) * | 2017-05-19 | 2017-10-03 | 亿信标准认证集团有限公司 | A kind of atmospheric aerosol harvester |
| CN107219099A (en) * | 2017-05-19 | 2017-09-29 | 亿信标准认证集团有限公司 | A kind of fume continuous automatic monitoring and control device |
| CN109406354A (en) * | 2017-08-15 | 2019-03-01 | 财团法人交大思源基金会 | Inertial impactor with wetted impact surface to prevent particle loading effects |
| CN111372524A (en) * | 2017-09-12 | 2020-07-03 | 纽卡斯尔诺森比亚大学 | Impact sampler for aerosol component collection |
| CN111372524B (en) * | 2017-09-12 | 2023-09-19 | 纽卡斯尔诺森比亚大学 | Impact sampler for aerosol component collection |
| CN110082166B (en) * | 2018-01-25 | 2021-10-29 | 北京方鸿智能科技有限公司 | Full-automatic radioactive aerosol sampling, measuring and analyzing system |
| CN110082166A (en) * | 2018-01-25 | 2019-08-02 | 北京方鸿智能科技有限公司 | Full-automatic radioactivity sampling of aerosol measuring and analysis system |
| CN109490935B (en) * | 2018-11-12 | 2020-06-26 | 西北核技术研究所 | Filtering material sample gamma measurement source preparation method and device based on particulate matter extraction |
| CN109490935A (en) * | 2018-11-12 | 2019-03-19 | 西北核技术研究所 | The filter sample γ measurement source method and device extracted based on particulate matter |
| US11047787B2 (en) | 2019-04-29 | 2021-06-29 | Research Triangle Institute | And method for optical bench for detecting particles |
| CN113447322A (en) * | 2021-05-20 | 2021-09-28 | 西北核技术研究所 | Low-energy-consumption aerosol sampling device on aircraft, particularly rotor wing unmanned aerial vehicle, and aircraft |
| CN113865945A (en) * | 2021-09-22 | 2021-12-31 | 大连理工大学 | Unpowered hood type passive sampling device for semi-volatile organic compounds and using method thereof |
| CN113865945B (en) * | 2021-09-22 | 2024-02-06 | 大连理工大学 | Unpowered hood type semi-volatile organic compound passive sampling device and application method thereof |
| CN114018655A (en) * | 2021-09-26 | 2022-02-08 | 苏州尚科洁净技术有限公司 | Fast disassembling structure of impactor |
| CN114018655B (en) * | 2021-09-26 | 2023-12-22 | 苏州尚科洁净技术有限公司 | Quick detaching structure of impactor |
| CN114544272A (en) * | 2022-02-11 | 2022-05-27 | 北京大学 | Cyclone type sand-dust aerosol grading sampling device, method and application |
| CN114544272B (en) * | 2022-02-11 | 2023-12-01 | 北京大学 | Cyclone type sand aerosol hierarchical sampling device, method and application |
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Application publication date: 20120118 |