CN103940753B - Gasoloid nucleation pulse producer - Google Patents
Gasoloid nucleation pulse producer Download PDFInfo
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- CN103940753B CN103940753B CN201410177454.6A CN201410177454A CN103940753B CN 103940753 B CN103940753 B CN 103940753B CN 201410177454 A CN201410177454 A CN 201410177454A CN 103940753 B CN103940753 B CN 103940753B
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Abstract
The present invention is specifically related to a kind of gasoloid nucleation pulse producer.Gasoloid nucleation pulse producer, its technical scheme is: the gas volume in pressure cylinder (1) changes in repeatability with the back and forth movement of piston (5), the pulsed of air pressure equally in high pressure-low pressure-high pressure in pressure cylinder (1) and sample cell (2) changes: when air pressure changes from low to high, water evaporation in water tank (4) is formed steam and to be entered in sample cell (2) by wireway (6) and compress, part water vapor condenses into the nucleus of condensation, and a small amount of nucleus of condensation agglomeration forms aqueous water and condenses upon on sample cell (2) wall; When air pressure changes from high to low, aqueous water evaporation forms steam molecule; The process of homogeneous nucleation-vaporization is completed in the period of change of a high pressure-low pressure; The lack of moisture caused in the process of nucleation-vaporization is supplemented by the water vapor volatilization in water tank (4).The kinetics mechanism that the present invention is research gasoloid nucleation provides convenient.
Description
Technical field
The invention belongs to chemical experiment field, be specifically related to a kind of gasoloid nucleation pulse producer.
Background technology
The PM2.5 diameter be namely scattered in air is less than or equal to the liquid or solid aerosol particle of 2.5 microns, has become the primary pollution source of atmospheric environment at present.How on earth PM2.5 is formed, ambient humidity, and how Atmospheric components affect its growth, and how does pM2.5 distribute in different areas? these problems have become the study hotspot of current environmentalist and chemists.Although the research now for aerocolloidal distribution and its growth course has achieved some achievements, but the particle due to the gasoloid nucleus of condensation is very little (being less than 3nm), be difficult to catch, therefore a lot of dispute and research blank still existed for aerocolloidal Review On The Nucleation Mechanism.Infrared spectrum technology can detect the structural information of the compound of different aggregative state, is the aerocolloidal important means of research.Therefore gasoloid nucleation pulse producer is combined with high-resolution infrared spectrum and can provide effective technical method for the research of gasoloid mechanism of nucleation.
Summary of the invention
The object of the invention is: be the kinetics mechanism of further investigation gasoloid nucleation, a kind of gasoloid nucleation pulse producer is provided;
Technical scheme of the present invention is: gasoloid nucleation pulse producer, and it comprises: pressure cylinder, sample cell, infrared spectrometric analyzer, thermometer, tensimeter and water tank;
Be provided with piston in pressure cylinder, piston back-and-forth movement changes gaseous tension in pressure cylinder and sample cell;
Sample cell is enclosed construction, and it is communicated with pressure cylinder by wireway; Thermometer and tensimeter is provided with in sample cell;
Water tank is enclosed construction, and it is communicated with sample cell by wireway;
Infrared spectrometric analyzer is connected with sample cell;
Gas volume in pressure cylinder changes in repeatability with the back and forth movement of piston, the pulsed of air pressure equally in high pressure-low pressure-high pressure in pressure cylinder and sample cell changes: when air pressure changes from low to high, water evaporation in water tank is formed steam and to be entered in sample cell by wireway and compress, part water vapor condenses into the nucleus of condensation, and a small amount of nucleus of condensation agglomeration forms aqueous water and condenses upon on sample pool wall; When air pressure changes from high to low, aqueous water evaporation forms steam molecule; The process of homogeneous nucleation-vaporization is completed in the period of change of a high pressure-low pressure; The lack of moisture caused in the process of nucleation-vaporization is supplemented by the water vapor volatilization in water tank.
The invention has the beneficial effects as follows: (1) utilizes the present invention can realize the process of gasoloid nucleation-vaporization fast, utilize detecting instrument can obtain the emergent pressure of gasoloid nucleation and gasoloid form between relation, for the kinetics mechanism of research gasoloid nucleation provides convenient;
(2) water tank can supplement the lack of moisture caused in the process of nucleation-vaporization in time, makes the process of nucleation-vaporization possess good periodicity and repeatability, meets the test condition of step-scan infrared spectrum;
(3) aerocolloidal one-tenth nuclear cycle can be controlled quantitatively by the motion frequency of control piston, for the quantitative examination obtaining gasoloid coring provides effective device.
Accompanying drawing explanation
Fig. 1 is structure of the present invention composition schematic diagram;
When Fig. 2 is piston back-and-forth movement, gas volume change schematic diagram in pressure cylinder;
Wherein, 1-pressure cylinder, 2-sample cell, 3-infrared spectrometric analyzer, 4-water tank, 5-piston, 6-wireway, 7-thermometer, 8-sample pot, 9-stop valve, 10-tensimeter, 11-data acquisition system (DAS), 12-display, 13-piston push-pull device at fixed.
Embodiment:
See accompanying drawing 1, embodiment 1: gasoloid nucleation pulse producer, it comprises: pressure cylinder 1, sample cell 2, infrared spectrometric analyzer 3, thermometer 7, tensimeter 10 and water tank 4;
Be provided with piston 5 in pressure cylinder 1, piston 5 back and forth movement changes gaseous tension in pressure cylinder 1 and sample cell 2;
Sample cell 2 is enclosed construction, and it is communicated with pressure cylinder 1 by wireway 6; Thermometer 7 and tensimeter 10 is provided with in sample cell 2;
Water tank 4 is enclosed construction, and it is communicated with sample cell 2 by wireway 6;
Infrared spectrometric analyzer 3 is connected with sample cell 2;
Infrared spectrometric analyzer 3, thermometer 7 and tensimeter 10 are for monitoring the change of sample in sample cell 2;
Gas volume in pressure cylinder 1 changes in repeatability with the back and forth movement of piston 5, because sample cell 2 is communicated with pressure cylinder 1 by wireway 6, therefore sample cell 2 and the air pressure in pressure cylinder 1 become the pulsed of high pressure-low pressure-high pressure to change equally: when figure 2 shows piston back-and-forth movement, gas volume change schematic diagram in pressure cylinder, when piston 5 moves to position (c) figure from (a) figure, pressure cylinder 1 and sample cell 2 internal gas pressure change from low to high, water evaporation in water tank 4 is formed steam and to be entered in sample cell 2 by wireway 6 and compress, part water vapor condenses into the nucleus of condensation, a small amount of nucleus of condensation agglomeration forms aqueous water and condenses upon on sample cell 2 wall, when piston 5 moves to (a) figure position from (c) figure position, aqueous water forms steam molecule, when piston 5 moves to (b) figure position, sample cell 2 is gas-vapor mix state, the process of homogeneous nucleation-vaporization is completed in the period of change of a high pressure-low pressure, the lack of moisture caused in the process of nucleation-vaporization is supplemented by the water vapor volatilization in water tank 4,
Judge that quantity and the dynamic process of gasoloid nucleation can be observed by infrared spectrometric analyzer 3: in spectrogram, vapor signal reduces, the signal of aqueous water strengthens, and declaratives water vapor has condensed nucleation, the power change of comprehensive steam and aqueous water signal, then can judge nucleation quantity.
Embodiment 2, preferably, for studying aerocolloidal heterogeneous nucleation process, on the basis of embodiment 1, gasoloid nucleation pulse producer also comprises the sample pot 8 that is equipped with volatile substances (as nitric acid, ammonia); Sample pot 8 is communicated with wireway 6 by stop valve 9, opens stop valve 9, and when piston 5 moves, the moisture of the liquid in sample pot 8 and water tank 4 volatilizes gas simultaneously and participates in aerocolloidal nucleation process.
Embodiment 3, preferably, for embodying intellectuality of the present invention, on the basis of embodiment 1 or 2, increases data acquisition system (DAS) 11; Thermometer 7 is gathered by data acquisition system (DAS) 11 with the Monitoring Data of tensimeter 10, and is shown by display 12; The temperature and pressure in sample cell 2 can be observed so very intuitively, be convenient to the movement rate regulating and controlling piston 5 as requested at any time.
Embodiment 4, on the basis of embodiment 1 or 2, the present invention also comprises piston push-pull device at fixed 13; The implementation of piston push-pull device at fixed 13 has multiple, and such as it can comprise: motor and by motor-driven ball-screw, to be fixedly connected with to drive its back and forth movement by ball-screw with piston 5; It can also comprise: motor, the gear be socketed on motor output shaft, with the runner of gears meshing and the push rod that is connected with runner, to be fixedly connected with piston 5 by push rod and to drive its back and forth movement.
Claims (6)
1. gasoloid nucleation pulse producer, it is characterized in that, it comprises: pressure cylinder (1), sample cell (2), infrared spectrometric analyzer (3), thermometer (7), tensimeter (10) and water tank (4);
Be provided with piston (5) in described pressure cylinder (1), described piston (5) back and forth movement changes described pressure cylinder (1) and sample cell (2) interior gaseous tension;
Described sample cell (2) is enclosed construction, and it is communicated with described pressure cylinder (1) by wireway (6); Described thermometer (7) and tensimeter (10) is provided with in described sample cell (2);
Described water tank (4) is enclosed construction, and it is communicated with described sample cell (2) by described wireway (6);
Described infrared spectrometric analyzer (3) is connected with described sample cell (2);
Gas volume in described pressure cylinder (1) changes in repeatability with the back and forth movement of described piston (5), the pulsed of air pressure equally in high pressure-low pressure-high pressure in described pressure cylinder (1) and sample cell (2) changes: when air pressure changes from low to high, water evaporation in water tank (4) is formed steam and to be entered in described sample cell (2) by described wireway (6) and compress, part water vapor condenses into the nucleus of condensation, and a small amount of nucleus of condensation agglomeration forms aqueous water and condenses upon on described sample cell (2) wall; When air pressure changes from high to low, described aqueous water evaporation forms steam molecule; The process of homogeneous nucleation-vaporization is completed in the period of change of a high pressure-low pressure; The lack of moisture caused in the process of described nucleation-vaporization is supplemented by the water vapor volatilization in described water tank (4).
2. gasoloid nucleation pulse producer as claimed in claim 1, it is characterized in that, it also comprises the sample pot (8) that is equipped with volatile substances; Described sample pot (8) is communicated with described wireway (6) by stop valve (9).
3. gasoloid nucleation pulse producer as claimed in claim 1 or 2, it is characterized in that, described thermometer (7) is gathered by data acquisition system (DAS) (11) with the Monitoring Data of described tensimeter (10), and by display (12) display.
4. gasoloid nucleation pulse producer as claimed in claim 1 or 2, it is characterized in that, it also comprises piston push-pull device at fixed (13).
5. gasoloid nucleation pulse producer as claimed in claim 4, it is characterized in that, described piston push-pull device at fixed (13) comprising: motor and by described motor-driven ball-screw, and described ball-screw is fixedly connected with described piston (5).
6. gasoloid nucleation pulse producer as claimed in claim 4, it is characterized in that, described piston push-pull device at fixed (13) comprising: motor, the gear be socketed on described motor output shaft, with the runner of described gears meshing and the push rod that is connected with runner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410177454.6A CN103940753B (en) | 2014-04-29 | 2014-04-29 | Gasoloid nucleation pulse producer |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410177454.6A CN103940753B (en) | 2014-04-29 | 2014-04-29 | Gasoloid nucleation pulse producer |
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| Publication Number | Publication Date |
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| CN103940753A CN103940753A (en) | 2014-07-23 |
| CN103940753B true CN103940753B (en) | 2016-01-13 |
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| CN201410177454.6A Expired - Fee Related CN103940753B (en) | 2014-04-29 | 2014-04-29 | Gasoloid nucleation pulse producer |
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| CN104502059B (en) * | 2014-12-02 | 2017-07-04 | 中国石油大学(华东) | Foam stabilization system safety testing device and method of work under a kind of pressure oscillation |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS5883237A (en) * | 1981-11-13 | 1983-05-19 | Shimadzu Corp | Powder aerosol generator |
| US5743251A (en) * | 1996-05-15 | 1998-04-28 | Philip Morris Incorporated | Aerosol and a method and apparatus for generating an aerosol |
| CN102641699A (en) * | 2012-04-27 | 2012-08-22 | 周斌 | Potassium chloride aerosol generation method and potassium chloride aerosol generation device |
| CN103076289B (en) * | 2013-01-18 | 2015-05-27 | 北京理工大学 | Water vapor generator with periodically-changing pressure |
| CN203155194U (en) * | 2013-04-02 | 2013-08-28 | 青岛众瑞智能仪器有限公司 | Aerosol generator |
| CN103566840B (en) * | 2013-11-04 | 2015-04-29 | 浙江大学 | System and method for producing high-time diluted PM2.5 aerosol |
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