CN102818746A - Method for detecting density of particles with different particle sizes - Google Patents
Method for detecting density of particles with different particle sizes Download PDFInfo
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- CN102818746A CN102818746A CN2012102797264A CN201210279726A CN102818746A CN 102818746 A CN102818746 A CN 102818746A CN 2012102797264 A CN2012102797264 A CN 2012102797264A CN 201210279726 A CN201210279726 A CN 201210279726A CN 102818746 A CN102818746 A CN 102818746A
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Abstract
The invention relates to a method for detecting density of particles with different particle sizes, comprising the following steps of: (1) arranging an impact-type air particle hierarchical sampler and a particle number concentration and particle size distribution meter, and arranging a plurality of sampling films in the impact-type air particle hierarchical sampler; (2) sampling the particles within different particle size ranges from the air by the impact-type air particle hierarchical sampler by using the sampling films to obtain the particles within corresponding particle size ranges; (3) carrying out constant weight treatment on each sampling film in a constant-temperature constant-humidity balance room before and after the sampling, and weighing the weight of each sampling film before and after the sampling by using a balance with the precision of 1/1000,000 to obtain the mass concentration of the particles within different particle size ranges in the air; (4) measuring the number concentration particle size distribution of the particles with the particle sizes between 10nm and 10 mum in the air by using the particle number concentration and particle size distribution meter; grouping the obtained data, and calculating the volume concentration of the particles within different particle size ranges; and (5) comparing the mass concentration and the volume concentration of the particles within the different particle size ranges to obtain each ratio coefficient, i.e., the density of the particles with different particle sizes.
Description
Technical field
The present invention relates to a kind of assay method of particle density, particularly about a kind of method of measuring different-grain diameter particle density.
Background technology
In the atmospheric environment scientific research; Particle density is one of important sign of particle chemical composition in the reflection atmospheric environment; It is indispensable parameter in the atmospheric environment pattern simulation still not, also is vital improvement factor in some particle surveying instruments.Under different atmospheric environments because the process feature difference of pollution source dischargings type difference and aerosol chemistry, caused on particle physical aspect and the chemical constitution than big-difference.Owing to measure series of parameters such as size distribution that particle density relates to particle, mass concentration, volumetric concentration, and the measuring accuracy of each parameter had relatively high expectations, therefore, also do not have directly to measure at present the instrument of particle density.
Summary of the invention
To the problems referred to above, the purpose of this invention is to provide a kind of strong operability, the device therefor cost is low, can accurately measure the method for different-grain diameter particle density.
For realizing above-mentioned purpose; The present invention takes following technical scheme: a kind of method of measuring different-grain diameter particle density, it may further comprise the steps: 1) be provided with in same place to be measured one comprise impacting type atmospheric particulate cascade sampling device and particulate count concentration size distribution appearance particle density measurement system; Be provided with the several layers sampling film according to himself adjustable particle diameter cut coverage in the impacting type atmospheric particulate cascade sampling device; Before the sampling, each layer sampling film of using in the impacting type atmospheric particulate cascade sampling device carries out constant weight in the constant temperature and humidity balance room; 2) impacting type atmospheric particulate cascade sampling device is sampled to the particle of variant particle size range in the atmosphere through the multilayer sampling film, obtains the particle in this corresponding particle size range; 3) after the sampling; Each layer sampling film is placed on the constant temperature and humidity balance room equally carries out constant weight; And use 1,000,000/precision balance that the forward and backward weight of each sampling film sampling is carried out weighing, to obtain the mass concentration of the particle in the variant particle size range in the atmosphere; 4) simultaneously particulate count concentration size distribution appearance is measured in the atmosphere several concentration size distribution of particle between 10nm to the 10 μ m; The gained data are divided into groups according to some particle size range of the impacting type atmospheric particulate cascade sampling device of step 1) employing, and calculate volumetric concentration at each particle size range endoparticle thing through several concentration size distribution of each particle; 5) mass concentration and the volumetric concentration corresponding with it with the particle of variant particle size range compares, and each scale-up factor of acquisition is different-grain diameter particle density.
In the said step 1); Impacting type atmospheric particulate cascade sampling device is MOUDI100, and its adjustable particle diameter cut coverage that has comprises: 0.056～0.1 μ m, 0.1～0.18 μ m, 0.18～0.32 μ m, 0.32～0.56 μ m, 0.56～1 μ m, 1～1.8 μ m, 1.8～3.2 μ m, 3.2～5.6 μ m and 5.6～10 μ m; Therefore be provided with nine layers of sampling film in this impacting type atmospheric particulate cascade sampling device; And forward and backwardly all carry out the constant weight more than 24 hours in the constant temperature and humidity balance room in sampling.
In the said step 5), several concentration size distribution of particle between 10nm to the 10 μ m in the particulate count concentration size distribution appearance measurement atmosphere; Nine particle size range of the impacting type atmospheric particulate cascade sampling device that the gained data are adopted according to step 1): 0.056～0.1 μ m, 0.1～0.18 μ m, 0.18～0.32 μ m, 0.32～0.56 μ m, 0.56～1 μ m, 1～1.8 μ m, 1.8～3.2 μ m, 3.2～5.6 μ m and 5.6～10 μ m divide into groups, and the severals concentration size distribution calculating through each particle are in the volumetric concentration of each particle size range endoparticle thing.
In the said step 3), the sampling time of impacting type atmospheric particulate cascade sampling device is continuous sampling in 24 hours, and sampling flow is 30 liters/minute.
The sampling film that uses in the said impacting type atmospheric particulate cascade sampling device is the aluminum sampling film of diameter 47mm.
The forward and backward ameripol bead of different-grain diameter that all utilizes of surveying work is demarcated the particle diameter cutting efficiency of said particulate count concentration size distribution appearance.
The present invention is owing to take above technical scheme, and it has the following advantages: 1, the present invention measures the mass concentration of the particle of different-grain diameter scope in the atmosphere through impacting type atmospheric particulate cascade sampling device; Measure the several concentration and the volume calculated concentration of the particle of different-grain diameter scope in the atmosphere simultaneously through particulate count concentration size distribution appearance; The mass concentration and the volumetric concentration of the particle in the same particle size range compare, and can obtain the particle density of different-grain diameter scope, and the inventive method strong operability, device therefor cost are low.2, each sampling film of the present invention all carries out the constant weight more than 24 hours in the constant temperature and humidity balance room before sampling and after the sampling; And the sampling back uses 1,000,000/balance that the weight before and after each sampling film sampling is carried out weighing; To obtain the mass concentration of the particle in the variant particle size range in the atmosphere; Can eliminate that temperature, humidity make measurement more accurate to the influence of sampled result before and after the sampling.The present invention can use under different longitude and latitude, different natural condition, can satisfy the demand of variable grain thing research field, can be applied in environmental administration and R&D institution the Atmospheric particulates research and the exploitation of particle surveying instrument commonly used at present.
Description of drawings
Fig. 1 is that the present invention measures schematic flow sheet
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is carried out detailed description.
As shown in Figure 1, the inventive method may further comprise the steps:
1) be provided with in same place to be measured one comprise impacting type atmospheric particulate cascade sampling device, particulate count concentration size distribution appearance particle density measurement system; Be provided with the several layers sampling film according to the particle diameter cut coverage that himself designs in the impacting type atmospheric particulate cascade sampling device, promptly the sampling particle diameter of particle is adjusted through the particle diameter cut coverage of different sample device; Before the sampling, each layer sampling film of using in the impacting type atmospheric particulate cascade sampling device need carry out the constant weight more than 24 hours in the constant temperature and humidity balance room.
2) impacting type atmospheric particulate cascade sampling device is sampled to the particle of variant particle size range in the atmosphere through the multilayer sampling film, obtains the particle in this corresponding particle size range.
3) for eliminating the influence of temperature before and after the sampling, humidity to sampled result; After the sampling each layer sampling film need carry out the constant weight more than 24 hours in the constant temperature and humidity balance room equally; And use 1,000,000/precision balance that the forward and backward weight of each sampling film sampling is carried out weighing, to obtain the mass concentration of the particle in the variant particle size range in the atmosphere.
4) simultaneously particulate count concentration size distribution appearance is measured in the atmosphere several concentration size distribution of particle between 10nm to the 10 μ m; The gained data are divided into groups according to some particle size range of the impacting type atmospheric particulate cascade sampling device of step 1) employing, and calculate volumetric concentration at each particle size range endoparticle thing through several concentration size distribution of each particle.
Suppose that each particle is shaped as sphere, the forward and backward ameripol bead of different-grain diameter that all need utilize of surveying work is demarcated the particle diameter cutting efficiency of particulate count concentration size distribution appearance, so that obtain particulate count concentration particle size distribution data accurately.
5) mass concentration and the volumetric concentration corresponding with it with the particle of variant particle size range compares, and each scale-up factor of acquisition is different-grain diameter particle density.
Enumerate a specific embodiment of the inventive method below.
1) be provided with in same place to be measured one comprise impacting type atmospheric particulate cascade sampling device and particulate count concentration size distribution appearance particle density measurement system; Advise that wherein the impacting type atmospheric particulate cascade sampling device that uses is MOUDI100, the adjustable particle diameter cut coverage that himself has comprises: 0.056～0.1 μ m, 0.1～0.18 μ m, 0.18～0.32 μ m, 0.32～0.56 μ m, 0.56～1 μ m, 1～1.8 μ m, 1.8～3.2 μ m, 3.2～5.6 μ m and 5.6～10 μ m; Therefore, in this impacting type atmospheric particulate cascade sampling device, be provided with nine layers of sampling film, and sampling film employing diameter is the aluminum sampling film of 47mm; Before the sampling, nine layers of sampling film carry out the constant weight more than 24 hours in the constant temperature and humidity balance room.
2) impacting type atmospheric particulate cascade sampling device is sampled to the particle of above-mentioned nine different-grain diameter scopes in the atmosphere through nine layers of sampling film, obtains the particle in this corresponding particle size range; For guaranteeing to collect enough aerosol sample amounts, the sampling time is generally continuous sampling in 24 hours, and sampling flow is 30 liters/minute.
3) for eliminating the influence of temperature before and after the sampling, humidity to sampled result; Nine layers of sampling film after the sampling need carry out the constant weight more than 24 hours in the constant temperature and humidity balance room equally; And use 1,000,000/precision balance that the forward and backward weight of each sampling film sampling is carried out weighing, to obtain the mass concentration of the particle in the variant particle size range in the atmosphere.
4) simultaneously particulate count concentration size distribution appearance is measured in the atmosphere several concentration size distribution of particle between 10nm to the 10 μ m; Nine particle size range of the impacting type atmospheric particulate cascade sampling device that the gained data are adopted according to step 1): 0.056～0.1 μ m, 0.1～0.18 μ m, 0.18～0.32 μ m, 0.32～0.56 μ m, 0.56～1 μ m, 1～1.8 μ m, 1.8～3.2 μ m, 3.2～5.6 μ m and 5.6～10 μ m divide into groups, and the severals concentration size distribution calculating through each particle are in the volumetric concentration of each particle size range endoparticle thing.
Suppose that each particle is shaped as sphere, all need utilize the ameripol bead of different-grain diameter that the particle diameter cutting efficiency of particulate count concentration size distribution appearance is demarcated before and after the surveying work, so that obtain particulate count concentration particle size distribution data accurately.
5) with in above-mentioned nine particle size range, the mass concentration and the volumetric concentration of the particle in the same particle size range compare, and obtain nine scale-up factors, are the particle density of above-mentioned nine particle size range.
The tentative application of the inventive method: in order to verify the feasibility of the inventive method; Mass concentration in the Beijing area to the different-grain diameter particle has carried out scheduling to last bimestrial continuous sampling with number concentration size distribution, has obtained from the particle density data of nine particle diameter sections between 0.056 μ m to the 10 μ m.
Above-mentioned each embodiment only is used to explain the present invention, and wherein the structure of each parts, connected mode etc. all can change to some extent, and every equivalents of on the basis of technical scheme of the present invention, carrying out and improvement all should not got rid of outside protection scope of the present invention.
Claims (9)
1. method of measuring different-grain diameter particle density, it may further comprise the steps:
1) be provided with in same place to be measured one comprise impacting type atmospheric particulate cascade sampling device and particulate count concentration size distribution appearance particle density measurement system; Be provided with the several layers sampling film according to himself adjustable particle diameter cut coverage in the impacting type atmospheric particulate cascade sampling device; Before the sampling, each layer sampling film of using in the impacting type atmospheric particulate cascade sampling device carries out constant weight in the constant temperature and humidity balance room;
2) impacting type atmospheric particulate cascade sampling device is sampled to the particle of variant particle size range in the atmosphere through the multilayer sampling film, obtains the particle in this corresponding particle size range;
3) after the sampling; Each layer sampling film is placed on the constant temperature and humidity balance room equally carries out constant weight; And use 1,000,000/precision balance that the forward and backward weight of each sampling film sampling is carried out weighing, to obtain the mass concentration of the particle in the variant particle size range in the atmosphere;
4) simultaneously particulate count concentration size distribution appearance is measured in the atmosphere several concentration size distribution of particle between 10nm to the 10 μ m; The gained data are divided into groups according to some particle size range of the impacting type atmospheric particulate cascade sampling device of step 1) employing, and calculate volumetric concentration at each particle size range endoparticle thing through several concentration size distribution of each particle;
5) mass concentration and the volumetric concentration corresponding with it with the particle of variant particle size range compares, and each scale-up factor of acquisition is different-grain diameter particle density.
2. a kind of method of measuring different-grain diameter particle density as claimed in claim 1; It is characterized in that: in the said step 1); Impacting type atmospheric particulate cascade sampling device is MOUDI100, and its adjustable particle diameter cut coverage that has comprises: 0.056～0.1 μ m, 0.1～0.18 μ m, 0.18～0.32 μ m, 0.32～0.56 μ m, 0.56～1 μ m, 1～1.8 μ m, 1.8～3.2 μ m, 3.2～5.6 μ m and 5.6～10 μ m; Therefore be provided with nine layers of sampling film in this impacting type atmospheric particulate cascade sampling device; And forward and backwardly all carry out the constant weight more than 24 hours in the constant temperature and humidity balance room in sampling.
3. a kind of method of measuring different-grain diameter particle density as claimed in claim 2 is characterized in that: in the said step 5), and several concentration size distribution of particle between 10nm to the 10 μ m in the particulate count concentration size distribution appearance measurement atmosphere; Nine particle size range of the impacting type atmospheric particulate cascade sampling device that the gained data are adopted according to step 1): 0.056～0.1 μ m, 0.1～0.18 μ m, 0.18～0.32 μ m, 0.32～0.56 μ m, 0.56～1 μ m, 1～1.8 μ m, 1.8～3.2 μ m, 3.2～5.6 μ m and 5.6～10 μ m divide into groups, and the severals concentration size distribution calculating through each particle are in the volumetric concentration of each particle size range endoparticle thing.
4. like claim 1 or 2 or 3 described a kind of methods of measuring different-grain diameter particle density, it is characterized in that: in the said step 3), the sampling time of impacting type atmospheric particulate cascade sampling device is continuous sampling in 24 hours, and sampling flow is 30 liters/minute.
5. like claim 1 or 2 or 3 described a kind of methods of measuring different-grain diameter particle density, it is characterized in that: the sampling film that uses in the said impacting type atmospheric particulate cascade sampling device is the aluminum sampling film of diameter 47mm.
6. a kind of method of measuring different-grain diameter particle density as claimed in claim 4 is characterized in that: the sampling film that uses in the said impacting type atmospheric particulate cascade sampling device is the aluminum sampling film of diameter 47mm.
7. like claim 1 or 2 or 3 or 6 described a kind of methods of measuring different-grain diameter particle density, it is characterized in that: the forward and backward ameripol bead of different-grain diameter that all utilizes of surveying work is demarcated the particle diameter cutting efficiency of said particulate count concentration size distribution appearance.
8. a kind of method of measuring different-grain diameter particle density as claimed in claim 4 is characterized in that: the forward and backward ameripol bead of different-grain diameter that all utilizes of surveying work is demarcated the particle diameter cutting efficiency of said particulate count concentration size distribution appearance.
9. a kind of method of measuring different-grain diameter particle density as claimed in claim 5 is characterized in that: the forward and backward ameripol bead of different-grain diameter that all utilizes of surveying work is demarcated the particle diameter cutting efficiency of said particulate count concentration size distribution appearance.
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Cited By (9)
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| CN106769697A (en) * | 2016-12-27 | 2017-05-31 | 北京大学 | Atmospheric nano thermodynamic property real-time tracing measurement apparatus and method |
| CN109164025A (en) * | 2018-11-15 | 2019-01-08 | 中建材环保研究院（江苏）有限公司 | A kind of thermal power plant PM2.5 test device and method |
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| CN111551470A (en) * | 2019-10-02 | 2020-08-18 | 香港理工大学 | Semi-online equipment and method for measuring acid particles in atmosphere |
| CN112964605A (en) * | 2021-02-08 | 2021-06-15 | 中国人民解放军军事科学院军事医学研究院 | Environmental particulate monitoring method and application |
| CN113218718A (en) * | 2021-04-30 | 2021-08-06 | 陕西国防工业职业技术学院 | Real-time online detection device for sampling atmospheric particulate pollutants and pretreating samples |
| WO2022014636A1 (en) * | 2020-07-15 | 2022-01-20 | 国立研究開発法人産業技術総合研究所 | Particle density measurement method and system therefor |
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| CN105510196A (en) * | 2015-12-08 | 2016-04-20 | 西安近代化学研究所 | Testing method for size distribution of solid propellant combustion smoke particles |
| CN105842135A (en) * | 2016-03-31 | 2016-08-10 | 远大空品科技有限公司 | Weight calculating method and data displaying method for dust |
| CN106769697A (en) * | 2016-12-27 | 2017-05-31 | 北京大学 | Atmospheric nano thermodynamic property real-time tracing measurement apparatus and method |
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| CN109164025A (en) * | 2018-11-15 | 2019-01-08 | 中建材环保研究院（江苏）有限公司 | A kind of thermal power plant PM2.5 test device and method |
| CN111551470A (en) * | 2019-10-02 | 2020-08-18 | 香港理工大学 | Semi-online equipment and method for measuring acid particles in atmosphere |
| CN110954664A (en) * | 2019-12-19 | 2020-04-03 | 台州纳远信息技术有限公司 | Environment monitoring and treating system and method |
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| WO2022014636A1 (en) * | 2020-07-15 | 2022-01-20 | 国立研究開発法人産業技術総合研究所 | Particle density measurement method and system therefor |
| JP7296172B2 (en) | 2020-07-15 | 2023-06-22 | 国立研究開発法人産業技術総合研究所 | Particle density measurement method and system |
| CN112964605A (en) * | 2021-02-08 | 2021-06-15 | 中国人民解放军军事科学院军事医学研究院 | Environmental particulate monitoring method and application |
| CN113218718A (en) * | 2021-04-30 | 2021-08-06 | 陕西国防工业职业技术学院 | Real-time online detection device for sampling atmospheric particulate pollutants and pretreating samples |
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Application publication date: 20121212 |