CN104568520A - Portable sampling device for pollution source dilution tunnel particles - Google Patents
Portable sampling device for pollution source dilution tunnel particles Download PDFInfo
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- CN104568520A CN104568520A CN201410841193.3A CN201410841193A CN104568520A CN 104568520 A CN104568520 A CN 104568520A CN 201410841193 A CN201410841193 A CN 201410841193A CN 104568520 A CN104568520 A CN 104568520A
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Abstract
A portable sampling device for pollution source dilution tunnel particles comprises a sampling tube, a pitot tube, a heating device, a diluter, a gas sample pipeline, a particle cutter, a shunt, sampling filter membranes, a sucking pump, a circulation loop, a single chip microcomputer, a pipeline temperature sensor Ts, a pipeline pressure sensor Ps, a pitot tube differential pressure sensor delta P1, a temperature sensor Tg, flow sensors q, a flow sensor Qr, a keyboard, a display and a communication interface, wherein the sampling tube, the diluter, the gas sample pipeline, the particle cutter, the shunt, the sampling filter membranes, the flow sensors q, the flow sensor Qr and the sucking pump are connected in series sequentially. The equal-speed sampling of the gas sample and constant-current graded collection of particle sizes in the gas sample can be realized, and the discharge amount of the particles in specific particle size can be calculated according to the flow speed of the gas sample in the pipeline and the diameter of the pipeline.
Description
Technical field
The present invention relates to a kind of portable pollution source dilution tunnel particle sampling device, belong to environment monitoring instrument field.
Background technology
When gathering the aerosol sample of specified particle diameter from discharge of pollutant sources pipeline (hereinafter referred to as pipeline), because the humidity of gas in pipelines, temperature are higher than ambient humidity, temperature, many dynamic physical chemical dynamics processes (nucleogenesis, coagulation, compression etc.) and chemical process can be there is in sampling system, affect sampled result.For avoiding change of size and the sample gas components change of sample gas in sampling process, obtaining representational monitoring result, the temperature of high temperature, high humidity and high concentration sample gas in sampling system, humidity and concentration must be reduced in the normal range of operation of instrument.
Existing method is diluted by sample gas by dilution process clean gas, collected specimens after sample air humidity degree, temperature, concentration are reduced.Prior art produces Bernoulli effect with fluidics, and sample gas is flowed out from pipeline.Its shortcoming is: first ejector volume is large, weight is large, carry inconvenience, and can not realize isokinetic sampling, thus also PM in bad calculating pipeline
2.5discharge capacity; It two is when will obtain plural sample, the lack of homogeneity of sample.
Summary of the invention
For the deficiency existing for prior art, the invention provides a kind of portable pollution source dilution tunnel particle sampling device, the function of particle size constant current sample grading in sample gas isokinetic sampling and sample gas can be realized, the discharge capacity of specified particle diameter particle can also be calculated according to sample gas velocity in pipeline, pipe diameter.
In order to solve the problems of the technologies described above, technical scheme of the present invention is: a kind of portable pollution source dilution tunnel particle sampling device, comprises sampling pipe, pitot tube, heating arrangement, diluter, sample feed channel, cutter for particles, shunt, sampling membrane, aspiration pump, closed circuit, single-chip microcomputer, Tube Temperature Sensor T
s, pipe pressure sensor P
s, pitot tube differential pressure pick-up △ P
1, temperature sensor T
g, flow sensor q, flow sensor Q
r, keyboard, display, communication interface; Described sampling pipe, diluter, sample feed channel, cutter for particles, shunt, sampling membrane, flow sensor q, flow sensor Q
r, aspiration pump connects successively.
Further, described closed circuit comprises exsiccator, filtrator, well heater and ebullator, and exsiccator, filtrator, well heater and ebullator are connected successively; Simultaneously in closed circuit, ebullator brings out mouth and is parallel on diluter, by the filter inlet Parallet three-way valve in closed circuit.
Further, described heating arrangement is placed on the outer wall of sampling pipe front end and diluter, and described heating arrangement is also equipped with temperature sensor Tg, described temperature sensor Tg and heating arrangement all electrically connect with single-chip microcomputer simultaneously.
Further, described pitot tube and sampling pipe, Tube Temperature Sensor T
sbe disposed in parallel in pipeline thief hatch, pitot tube connecting tube pressure transducer P
sand pitot tube differential pressure pick-up △ P
1, described Tube Temperature Sensor T
s,pipe pressure sensor P
sand pitot tube differential pressure pick-up △ P
1all be electrically connected with single-chip microcomputer.
Further, described cutter for particles entrance is equipped with temperature sensor T
r, pressure transducer P
r, described temperature sensor T
r, pressure transducer P
rall electrically connect with single-chip microcomputer.
Further, described shunt is placed between the outlet of cutter for particles and sampling membrane, described shunt is a closed circular cylindrical cavity, the shunt draft tube of a sample gas stretches into shunt inside from center, shunt upper surface, the shunt escape pipe of sample gas stretches into shunt inside from the lower surface of shunt, and be centrally circumferentially uniformly distributed same, described shunt escape pipe number is generally 2-100 root.
Further, described shunt draft tube connects with the outlet of cutter for particles, shunt escape pipe serial connection sampling membrane, sampling membrane outlet serial connection flow sensor q; The gas outlet of flow sensor q connects many siphunculus, and an outlet of many siphunculus is connected with three-way pipe, two other mouth of three-way pipe respectively with closed circuit and flow sensor Q
rair intake opening is connected, flow sensor Q
rgas outlet is connected with aspiration pump air intake opening.
Further, described flow sensor q, flow sensor Q
rall be electrically connected with single-chip microcomputer.
Further, described keyboard, display, communication interface, aspiration pump and ebullator all electrically connect with single-chip microcomputer.
Further, described sampling pipe and sample feed channel are made up of polishing stainless steel pipe or glass.
The invention has the beneficial effects as follows: 1, utilize air mix facilities by after the gas processing of high humidity, high temperature, high concentration, raw sample can be collected; 2, after cutter, increase shunt again can realize obtaining multiple sample simultaneously, and because of sample in separation vessel even, a serial connection flow sensor after after each filter membrane, so the homogeneity of each sample is good, sampling volume is clear and definite; 3, can realize isokinetic sampling, the functional requirement of particle size constant current cascade sampling in sample gas, therefore, can calculate the total release of pipeline pollutant simultaneously; 4, volume little, lightweight, be convenient for carrying; 5, simple to operate, automation and intelligentification level is high.Device of the present invention is also applicable to gather harmful gas, flue dust, the SVOCs sample in pipeline.
Accompanying drawing explanation
Fig. 1 is a kind of four-way PM of the present invention
2.5the structural principle schematic diagram of particle sampling device.
1. sampling pipe; 2. pitot tube; 3. heating arrangement; 4. diluter; 5. sample feed channel; 6. cutter for particles; 7. shunt; 8. sampling membrane (m
1, m
2, m
3, m
4); 9. flow sensor q(q
1, q
2, q
3, q
4); 10. siphunculus more than; 11. threeways; 12. flow sensor Q
r; 13. aspiration pumps; 14. closed circuits; 15. exsiccators; 16. filtrators; 17. well heaters; 18. ebullators; 19. Tube Temperature Sensor T
s; 20. pipe pressure sensor P
s; 21. pitot tube differential pressure pick-up △ P
1; 22. temperature sensor T
g; 23. temperature sensor T
r; 24. pressure transducer P
r; 25. shunt draft tube; 26. shunt escape pipe (C
1, C
2, C
3, C
4); 27. single-chip microcomputers; 28. keyboards; 29. displays; 30. communication interfaces.
Embodiment
embodiment 1
The present embodiment is a kind of four-way PM
2.5particle sampling device, as described in Figure 1, a kind of portable pollution source dilution tunnel particle sampling device, comprises sampling pipe 1, pitot tube 2, heating arrangement 3, diluter 4, sample feed channel 5, cutter for particles 6, shunt 7, sampling membrane (m
1, m
2, m
3, m
4) 8, aspiration pump 13, closed circuit 14, single-chip microcomputer 27, Tube Temperature Sensor T
s19, pipeline pressure sensor P
s20, pitot tube differential pressure pick-up △ P
121, flow sensor q(q
1, q
2, q
3, q
4) 9, flow sensor Q
r12, keyboard 28, display 29, communication interface 30; Closed circuit 14 comprises exsiccator 15, filtrator 16, well heater 17, ebullator 18 and connecting tube, and described exsiccator 15, filtrator 16, well heater 17, ebullator 18 are connected successively; Sampling pipe 1, diluter 4, sample feed channel 5, cutter for particles 6, shunt 7, sampling membrane (m
1, m
2, m
3, m
4) 8, flow sensor q 9, flow sensor Q
r12, aspiration pump 13 is connected (wherein sampling membrane (m successively
1, m
2, m
3, m
4) 8 respectively with flow sensor q(q
1, q
2, q
3, q
4) 9 series connection after be parallel to 4 shunt escape pipe (C
1, C
2, C
3, C
4) between 26 and many siphunculus 10), and ebullator 18 in closed circuit 14 is brought out mouth and be parallel on diluter 4, by the filtrator 16 entrance Parallet three-way valve 11 in closed circuit 14.
Sampling pipe 1 is the passage gathering sample gas, require inner wall smooth, to reduce the wall loss of sample gas, available interior polishing stainless steel pipe or glass are made, on the outer wall of sampling pipe 1 front end and diluter 4, be provided with heating arrangement 3, described heating arrangement 3 is also provided with temperature sensor Tg 22, described temperature sensor Tg 22 electrically connects with single-chip microcomputer 27; During work, temperature signal in heating arrangement is reached single-chip microcomputer 27 by temperature sensor Tg 22, single-chip microcomputer 27 controls heating arrangement 3 and heats or quit work, and makes temperature value in device equal with the pipe temperature value that Tube Temperature Sensor Ts 19 records, in order to avoid sample gas is because of cooling condensation.
Pitot tube 2 and sampling pipe 1, Tube Temperature Sensor T
s19 are arranged on pipeline thief hatch place side by side, connecting tube pressure transducer P after pitot tube 2
s20, pitot tube differential pressure pick-up △ P
121; Tube Temperature Sensor T
s19, pipe pressure sensor P
s20, pitot tube differential pressure pick-up △ P
121 electrically connect with single-chip microcomputer 27, respectively for parameters such as the temperature in measuring channel, dynamic pressure, static pressure, flow velocitys.
Cutter for particles 6 porch is provided with temperature sensor T
r23, pressure transducer P
r24, described temperature sensor T
r23, pressure transducer P
r24 electrically connect with single-chip microcomputer 27 respectively, for measuring pressure, the temperature of cutter for particles 6 entrance, participate in the sample gas operating mode flow value calculated by cutter for particles 6.
Shunt 7 is closed circular cylindrical cavities, 1 shunt draft tube 25 stretches into shunt 7 inside from center, shunt 7 upper surface, 4 shunt escape pipes (C1, C2, C3, C4) 26 stretch into shunt 7 inside from the lower surface of shunt 7, and be centrally circumferentially uniformly distributed same, in order to reduce the wall loss of sample gas, require shunt draft tube 25, shunt escape pipe (C1, C2, C3, C4) 26 inner wall smooth.Shunt draft tube 25 connects with the outlet of cutter for particles 6,4 shunt escape pipes (C1, C2, C3, C4) 26 respectively with 4 sampling membrane (m
1, m
2, m
3, m
4) 8 serial connections, at 4 sampling membrane (m
1, m
2, m
3, m
4) 8 outlet after be serially connected with 4 flow sensor q(q respectively
1, q
2, q
3, q
4) 16, flow sensor q(q
1, q
2, q
3, q
4) 9 gas outlet connect many siphunculus 10, an outlet of many siphunculus 10 is connected with threeway 11, two other mouth of threeway 11 respectively with closed circuit 14 and flow sensor Q
r12 are connected.
The exhausr port of ebullator 18 is connected on diluter 4 entrance, and exsiccator 15 entrance one end is connected with threeway 11.
Flow sensor q(q
1, q
2, q
3, q
4) 9 to electrically connect with single-chip microcomputer 27, be respectively used to measure by filter membrane (m
1, m
2, m
3, m
4) 8 gas flow and volume.
Flow sensor Q
r12 gas outlets are connected with aspiration pump 13 air intake opening, flow sensor Q
r12 electrically connect, for measuring Q with single-chip microcomputer 27
rthe flow of gas circuit and volume.
Keyboard 28 and single-chip microcomputer 27 electrically connect, for inputting relevant information; Display 29 and single-chip microcomputer 27 electrically connect, for showing sampled relevant information; Communication interface 30 and single-chip microcomputer 27 electrically connect, for exporting correlated sampling information.
During sampling, under the effect of aspiration pump 13, sample gas is drawn out of from pipeline, enter in diluter 4 by sampling pipe 1, simultaneously, cleaned air enters in diluter 4 by closed circuit 14 under the effect of ebullator 18, sample gas is diluted, after the humidity of sample gas, temperature and concentration all decrease, cutter for particles 6 is entered, in cutter for particles 6, according to aerodynamic principle by sample feed channel 5, bulky grain thing in sample gas is removed, and collected aerosol sample is being delayed at sampling membrane 8(m through sampling membrane
1, m
2, m
3, m
4) on.
When isokinetic sampling is achieved in that sampling, by pitot tube 2 by the dynamic pressure in pipeline, static pressure through pipe pressure sensor P
s20, pitot tube differential pressure pick-up △ P
121 reach single-chip microcomputer 27, and single-chip microcomputer 27 is according to pitot tube differential pressure pick-up △ P
121 measured values calculate the flow velocity in pipeline, and according to the diameter (outspoken footpath of sampling) of sampling tube inlet and Tube Temperature Sensor T
s19 temperature values recorded calculate isokinetic sampling's flow value q
r' (operating mode flow), controls the rotating speed of aspiration pump 13, makes to mark condition by the flow value Qr(of flow sensor Qr 12) and isokinetic sampling's flow value q
rthe corresponding mark condition flow value Qr ' of ' (operating mode flow) is equal, implements isokinetic sampling.When flow velocity in pipeline becomes large, pitot tube 2 records signal and reaches single-chip microcomputer 27, and single-chip microcomputer 27 controls aspiration pump 13 rotating speed according to the corresponding discharge calculated to be increased, and makes to be increased to isokinetic sampling's flow value Qr ' by the flow value of flow sensor Qr 12; Otherwise, as the same.
Particle size constant current cascade sampling is achieved in that after selecting cutter for particles 6, working point flow value q
c(operating mode flow) just fixedly determines, and therefore, requires that by the sample air flow value of cutter for particles 6 be constant, and the rotating speed that this value controls aspiration pump 13 and ebullator 18 by single-chip microcomputer 27 realizes.Cutter for particles 6 working point flow q
cequal isokinetic sampling's flow value q
r' (operating mode flow) and closed circuit flow value q
x(operating mode flow) sum, i.e. q
c=q
r'+q
x, wherein: q
r' value is isokinetic sampling's flow value, q
cvalue is according to flow sensor q(q by single-chip microcomputer 27
1, q
2, q
3, q
4) the 9 mark condition flow value Q recorded
c, the Pr value that records of the Tr value that records of temperature sensor Tr 23 and pressure transducer Pr 24 calculates.During sampling, under the effect of aspiration pump 13 and ebullator 18, sample gas enters cutter for particles 6, and single-chip microcomputer 27 is according to the cutter for particles 6 working flow point q of setting
cwith isokinetic sampling's flow value q
r' difference q
x=q
c-q
r', the rotating speed of controlled circulation pump 18, makes by flow sensor q(q
1, q
2, q
3, q
4) 9 flow value (being converted into the operating mode flow value of cutter for particles porch) with setting working point flow q
cequal, realize particle size constant current cascade sampling.When the flow velocity in pipeline increases, the rotating speed that first single-chip microcomputer 27 controls aspiration pump 13 increases, and isokinetic sampling's flow is increased, meanwhile, is reduced, make flow sensor q(q by the rotating speed of single-chip microcomputer 27 controlled circulation pump 18
1, q
2, q
3, q
4) 9 flow values recorded (being converted into the operating mode flow value of cutter for particles porch) with setting working point flow value q
cequal, achieve particle size constant current cascade sampling; Otherwise, as the same.
embodiment 2
The embodiment of the present invention is a kind of four-way PM of Hexamermis spp
2.5particle sampling device, needs 6 shunt escape pipes to connect respectively at 6 sampling membranes, and 6 flow sensor q, flow sensor q gas outlet of connecting respectively after 6 sampling membranes is connected with many siphunculus, and itself and structure are all identical with the structure of the present embodiment.
embodiment 3
The embodiment of the present invention is a kind of four-way PM of two passages
2.5particle sampling device, needs 2 shunt escape pipes to connect respectively at 2 sampling membranes, and 2 flow sensor q, flow sensor q gas outlet of connecting respectively after 2 sampling membranes is connected with many siphunculus, and itself and structure are all identical with the structure of the present embodiment.
Device of the present invention is also applicable to gather harmful gas, flue dust, the SVOCs sample in pipeline.
In sum, the present invention utilizes air mix facilities by after the gas processing of high humidity, high temperature, high concentration, can collect raw sample; Increase shunt again at cutter can realize obtaining multiple sample simultaneously, and because of sample in separation vessel even, a serial connection flow sensor after after each filter membrane, so the homogeneity of each sample is good, sampling volume is clear and definite; Can realize isokinetic sampling, the functional requirement of particle size constant current cascade sampling in sample gas, therefore, can calculate the total release of pipeline pollutant simultaneously; Volume is little, lightweight, be convenient for carrying; Simple to operate, automation and intelligentification level is high.
Describe the present invention by way of example above, but the invention is not restricted to above-mentioned specific embodiment, all any changes of doing based on the present invention or modification all belong to the scope of protection of present invention.
Claims (10)
1. a portable pollution source dilution tunnel particle sampling device, is characterized in that: comprise sampling pipe, pitot tube, heating arrangement, diluter, sample feed channel, cutter for particles, shunt, sampling membrane, aspiration pump, closed circuit, single-chip microcomputer, Tube Temperature Sensor T
s, pipe pressure sensor P
s, pitot tube differential pressure pick-up △ P
1, temperature sensor T
g, flow sensor q, flow sensor Q
r, keyboard, display, communication interface; Described sampling pipe, diluter, sample feed channel, cutter for particles, shunt, sampling membrane, flow sensor q, flow sensor Q
r, aspiration pump connects successively.
2. described portable pollution source dilution tunnel particle sampling device according to claim 1, it is characterized in that: described closed circuit comprises exsiccator, filtrator, well heater and ebullator, exsiccator, filtrator, well heater and ebullator are connected successively; Simultaneously in closed circuit, ebullator brings out mouth and is parallel on diluter, by the filter inlet Parallet three-way valve in closed circuit.
3. described portable pollution source dilution tunnel particle sampling device according to claim 1, it is characterized in that: described heating arrangement is placed on the outer wall of sampling pipe front end and diluter, described heating arrangement is also equipped with temperature sensor Tg, described temperature sensor Tg and heating arrangement all electrically connect with single-chip microcomputer simultaneously.
4. described portable pollution source dilution tunnel particle sampling device according to claim 1, is characterized in that: described pitot tube and sampling pipe, Tube Temperature Sensor T
sbe disposed in parallel in pipeline thief hatch, pitot tube connecting tube pressure transducer P
sand pitot tube differential pressure pick-up △ P
1, described Tube Temperature Sensor T
s,pipe pressure sensor P
sand pitot tube differential pressure pick-up △ P
1all be electrically connected with single-chip microcomputer.
5. described portable pollution source dilution tunnel particle sampling device according to claim 1, is characterized in that: described cutter for particles entrance is equipped with temperature sensor T
r, pressure transducer P
r, described temperature sensor T
r, pressure transducer P
rall electrically connect with single-chip microcomputer.
6. described portable pollution source dilution tunnel particle sampling device according to claim 1, it is characterized in that: described shunt is placed between the outlet of cutter for particles and sampling membrane, described shunt is a closed circular cylindrical cavity, the shunt draft tube of a sample gas stretches into shunt inside from center, shunt upper surface, the shunt escape pipe of sample gas stretches into shunt inside from the lower surface of shunt, and be centrally circumferentially uniformly distributed same, described shunt escape pipe number is generally 2-100 root.
7. described portable pollution source dilution tunnel particle sampling device according to claim 1, it is characterized in that: described shunt draft tube connects with the outlet of cutter for particles, shunt escape pipe serial connection sampling membrane, sampling membrane outlet serial connection flow sensor q; The gas outlet of flow sensor q connects many siphunculus, and an outlet of many siphunculus is connected with three-way pipe, two other mouth of three-way pipe respectively with closed circuit and flow sensor Q
rair intake opening is connected, flow sensor Q
rgas outlet is connected with aspiration pump air intake opening.
8. described portable pollution source dilution tunnel particle sampling device according to claim 7, is characterized in that: described flow sensor q, flow sensor Q
rall be electrically connected with single-chip microcomputer.
9. described portable pollution source dilution tunnel particle sampling device according to claim 1, is characterized in that: described keyboard, display, communication interface, aspiration pump and ebullator all electrically connect with single-chip microcomputer.
10. described portable pollution source dilution tunnel particle sampling device according to claim 1, is characterized in that: described sampling pipe and sample feed channel are made up of polishing stainless steel pipe or glass.
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| CN201410841193.3A CN104568520A (en) | 2014-12-30 | 2014-12-30 | Portable sampling device for pollution source dilution tunnel particles |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410841193.3A CN104568520A (en) | 2014-12-30 | 2014-12-30 | Portable sampling device for pollution source dilution tunnel particles |
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ID=53085100
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Cited By (10)
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| CN104792582A (en) * | 2015-05-05 | 2015-07-22 | 青岛精益信电子技术有限公司 | Pollution source fine particulate matter dilution sampling method and device |
| CN105466826A (en) * | 2015-12-31 | 2016-04-06 | 聚光科技(杭州)股份有限公司 | System and method for online monitoring particles |
| CN106370573A (en) * | 2016-09-14 | 2017-02-01 | 石家庄瑞澳科技有限公司 | Heating extraction type smoke on-line detection system and corresponding detection method |
| CN107014648A (en) * | 2017-04-26 | 2017-08-04 | 浙江菲达环保科技股份有限公司 | A kind of portable PM2.5 samplers |
| CN107727541A (en) * | 2017-10-31 | 2018-02-23 | 中国石油大学(北京) | Aerosol monitoring device and method and pipe-line system in pipeline |
| CN108663240A (en) * | 2018-06-28 | 2018-10-16 | 北京市环境保护监测中心 | Atmospheric particulates sample current divider |
| CN108956151A (en) * | 2018-09-30 | 2018-12-07 | 广西玉柴机器股份有限公司 | A kind of engine crankcase discharge sampler |
| CN109596475A (en) * | 2018-12-27 | 2019-04-09 | 复旦大学 | The aerosol cloud system of atmospheric aerosol wall damage in a kind of measurable simulated environment |
| CN112014158A (en) * | 2020-07-21 | 2020-12-01 | 武汉雅洛诗商贸有限公司 | Multipurpose particulate matter sampler |
| CN114199808A (en) * | 2020-09-17 | 2022-03-18 | 北京乐氏联创科技有限公司 | Sampling method for VOCs with high dilution ratio |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104792582A (en) * | 2015-05-05 | 2015-07-22 | 青岛精益信电子技术有限公司 | Pollution source fine particulate matter dilution sampling method and device |
| CN105466826A (en) * | 2015-12-31 | 2016-04-06 | 聚光科技(杭州)股份有限公司 | System and method for online monitoring particles |
| CN106370573A (en) * | 2016-09-14 | 2017-02-01 | 石家庄瑞澳科技有限公司 | Heating extraction type smoke on-line detection system and corresponding detection method |
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| CN107727541A (en) * | 2017-10-31 | 2018-02-23 | 中国石油大学(北京) | Aerosol monitoring device and method and pipe-line system in pipeline |
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| CN108956151A (en) * | 2018-09-30 | 2018-12-07 | 广西玉柴机器股份有限公司 | A kind of engine crankcase discharge sampler |
| CN109596475A (en) * | 2018-12-27 | 2019-04-09 | 复旦大学 | The aerosol cloud system of atmospheric aerosol wall damage in a kind of measurable simulated environment |
| CN112014158A (en) * | 2020-07-21 | 2020-12-01 | 武汉雅洛诗商贸有限公司 | Multipurpose particulate matter sampler |
| CN114199808A (en) * | 2020-09-17 | 2022-03-18 | 北京乐氏联创科技有限公司 | Sampling method for VOCs with high dilution ratio |
| CN114199808B (en) * | 2020-09-17 | 2023-12-26 | 北京乐氏联创科技有限公司 | VOCs sampling method with high dilution ratio |
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