CN203203906U - Device for measuring distribution of PM 2.5 particles which are grown up through water vapor phase change condensation - Google Patents
Device for measuring distribution of PM 2.5 particles which are grown up through water vapor phase change condensation Download PDFInfo
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- CN203203906U CN203203906U CN 201320221678 CN201320221678U CN203203906U CN 203203906 U CN203203906 U CN 203203906U CN 201320221678 CN201320221678 CN 201320221678 CN 201320221678 U CN201320221678 U CN 201320221678U CN 203203906 U CN203203906 U CN 203203906U
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Abstract
The utility model provides a device for measuring distribution of PM 2.5 particles which are grown up through water vapor phase change condensation. The device comprises a growing pipe, a leading-out pipe, a shunting device, a measuring outer pipe, a measuring inner pipe, a vacuum pump and a measuring instrument. A smoke inlet and a water outlet are formed in the lower portion of the growing pipe, a smoke outlet and a water inlet are formed in the upper portion of the growing pipe, an air inlet of the leading-out pipe is formed in the growing pipe, an air outlet is connected with the shunting device, the shunting device comprises an outer air outlet pipe and an inner air outlet pipe which are sequentially arranged from outside to inside, the outer air outlet pipe is connected with the measuring outer pipe, the inner air outlet pipe is connected with the measuring inner pipe, a filter screen is arranged in the outer air outlet pipe, the vacuum pump is connected with the measuring outer pipe and the measuring inner pipe respectively, and detecting windows of the measuring instrument are arranged on the measuring outer pipe and the measuring inner pipe. The device for measuring distribution of the PM 2.5 particles which are grown up through water vapor phase change condensation is simple in structure, low in cost, convenient to use, and accurate in measuring results.
Description
Technical field
The utility model belongs to and promotes in the flue gas fine particle grow up studying technological domain, particularly the PM2.5 grain size behind a kind of steam phase transformation condensation growth and the measurement mechanism of distributed number thereof.
Background technology
PM2.5 refers to aerodynamic diameter less than the fine grained of 2.5m.Although PM2.5 is content component seldom in the earth atmosphere composition, it has important impact to air quality and visibility etc.For steam phase transforming PM2.5 is grown up in recent years and done a lot of research, but still there is not a kind of reliable method to measure the size-grade distribution of PM2.5 particle behind the steam phase transforming condensation growth, measuring the difficult problem that can run into laser particle analyzer is that the particle surface of phase transformation condensation growth adheres to water membrane, when particle can condense into drop at window during by measurement window, thereby so that measurement result is inaccurate, larger with actual gap.Measure its size-grade distribution so need a kind of new method.
The utility model content
The utility model purpose: thus the purpose of this utility model provides a kind of steam of can effectively avoiding in measurement window condense PM2.5 grain size after making accurately steam phase transformation of measurement result condensation growth and measurement mechanism and the measuring method of distributed number thereof.
Technical scheme: the measurement mechanism of the PM2.5 distribution of particles behind the steam phase transformation condensation growth that the utility model provides comprises growth tube, delivery line, part flow arrangement, measurement outer tube, measures inner tube, vacuum pump and surveying instrument; Described growth tube bottom is provided with gas approach and water out, top are provided with exhanst gas outlet and water inlet; The air intake opening of described delivery line is located in the growth tube, the gas outlet is connected with part flow arrangement; Described part flow arrangement comprises outer escape pipe and the interior escape pipe that from outer to inner sets gradually, and described outer escape pipe is connected with the measurement outer tube, and described interior escape pipe is connected with the measurement inner tube, is provided with screen pack in the described outer escape pipe; Described vacuum pump respectively with measure outer tube and be connected inner tube and be connected; The detection window of described surveying instrument is located at and is measured on outer tube and the measurement inner tube.
As improvement, described measurement outer tube and measurement inner tube are quartz glass tube; Thereby do not affect the particularly measurement of laser surveying instrument of surveying instrument, make measurement more accurate.
As preferably, the side's of being shaped as body of described measurement outer tube, described measurement inner tube be shaped as right cylinder.
Preferred as another kind, the width of described measurement outer tube is 5:1 with the diameter ratio of measuring inner tube, thereby guarantees that the air-flow of inner tube can not be subject to the cooling of extraneous air.
Preferred as another kind, described surveying instrument is the laser droplet collector.
As improvement, described screen pack comprises suction filtering layer and fine grained filtering layer, and the preferred HEPA high-level efficiency of described fine grained filtering layer particulate filter screen is to guarantee the cleaning of protection gas in the outer escape pipe.
The utility model also provides the measuring method of the PM2.5 distribution of particles behind the steam phase transformation condensation growth, may further comprise the steps:
(1) to make temperature be 0～50 ℃ of cold flue gas that contains the PM2.5 particle from the bottom of growth tube enters that growth tube is backward to flow, passing into temperature from the water inlet of growth tube is that 20～100 ℃ water makes the tube wall of growth tube form water curtain, cold flue gas contacts with water and form the supersaturation water steam in growth tube, supersaturation water steam condenses at the PM2.5 particle surface PM2.5 particle is grown up, and the gas that part contains the PM2.5 particle after growing up passes into delivery line;
(2) gas that passes into the PM2.5 particle after growing up containing of delivery line is shunted in part flow arrangement, and a part of gas is filtered into clean gas as protection gas in measuring outer tube, and a part of gas enters and measures inner tube as gas to be measured in addition; Utilize surveying instrument to measure grain size and the distributed number thereof of the rear PM2.5 that grows up.
Beneficial effect: the measurement mechanism of the PM2.5 distribution of particles behind the steam phase transformation condensation growth that the utility model provides is simple in structure, with low cost, easy to use; draw the measurement outer tube that plays " tracking mode " insulation effect by isocon; effectively protected the spatter property of measuring inner tube; can effectively avoid condensing into aqueous water at the steam of measuring inner tube at wall; the filtering layer that arranges in isocon simultaneously cleans protection gas; guaranteed to measure penetrating of laser, thereby made measurement result accurate.
Description of drawings
Fig. 1 is the structural representation of the measurement mechanism of PM2.5 grain size behind the utility model steam phase transformation condensation growth and distributed number thereof;
Fig. 2 is the filter screen structure schematic diagram.
Embodiment
Make and further specifying below in conjunction with PM2.5 grain size and the measurement mechanism of distributed number thereof of accompanying drawing after to the utility model steam phase transformation condensation growth, should understand these embodiment only is used for explanation the utility model and is not used in restriction scope of the present utility model, after having read the utility model, those skilled in the art all fall within the application's claims limited range to the modification of the various equivalent form of values of the present utility model.
The measurement mechanism of the PM2.5 distribution of particles behind the steam phase transformation condensation growth is seen Fig. 1 and Fig. 2, comprises growth tube 1, delivery line 2, part flow arrangement 3, measures outer tube 4, measures inner tube 5, vacuum pump 6 and surveying instrument 7; Growth tube 1 bottom is provided with gas approach 8 and water out 11, top are provided with exhanst gas outlet 9 and water inlet 10; The air intake opening of delivery line 2 is located in the growth tube 1, the gas outlet is connected with part flow arrangement 3; Part flow arrangement 3 comprises outer escape pipe 12 and the interior escape pipe 13 that from outer to inner sets gradually, outer escape pipe 12 is connected with measurement outer tube 4, interior escape pipe 13 is connected with measurement inner tube 5, be provided with screen pack 14 in the outer escape pipe 12, screen pack 14 comprises suction filtering layer 15 and fine grained filtering layer 16 successively along the steam approach axis, fine grained filtering layer 16 preferred HEPA high-level efficiency particulate filter screens, its particle purification efficiency to 0.3 μ m is 99.7%; Measurement outer tube 4 and measurement inner tube 5 are quartz glass tube, measure the side's of being shaped as body of outer tube 4, measure the right cylinder that is shaped as of inner tube 5, and the width of measurement outer tube 4 is 5:1 with the diameter ratio of measuring inner tube 5; Vacuum pump 6 respectively with measure outer tube 4 and be connected inner tube 5 and be connected; Surveying instrument 7 is the laser droplet collector, and its detection window is located at and is measured on outer tube 4 and the measurement inner tube 5.
Utilize PM2.5 grain size behind this measurement device steam phase transformation condensation growth and the method for distributed number thereof, see Fig. 1, may further comprise the steps:
(1) to make temperature be 0～50 ℃ of cold flue gas that contains the PM2.5 particle from the bottom of growth tube enters that growth tube is backward to flow, tangentially pass into the tube wall formation water curtain that the temperature water higher than flue gas makes growth tube from the water inlet of growth tube, water temperature is preferably 20～100 ℃, water in the process of cold flue gas and decline contacts and form the supersaturation water steam in growth tube, supersaturation water steam is at PM2.5 particle surface condensation growth, and the gas that part contains the PM2.5 particle after growing up passes into delivery line;
(2) utilize vacuum pump to bleed, the gas that passes into the PM2.5 particle after growing up containing of delivery line is shunted in part flow arrangement, part gas obtains clean gas as protection gas filter the particle removed in the air-flow and steam in measuring outer tube after, so just can condensing water droplet on the outer wall of conduit, simultaneously because the fine particle in this part air-flow also is excluded so also can not affects the measurement of surveying instrument, a part of gas enters and measures inner tube as gas to be measured in addition, although contain water vapour in this part air-flow, externally also can not condense into water droplet at window to be measured under the insulation of air-flow; Utilize surveying instrument to measure grain size and the distributed number thereof of PM2.5.
Claims (6)
1. the measurement mechanism of the PM2.5 distribution of particles behind the steam phase transformation condensation growth is characterized in that: comprise growth tube (1), delivery line (2), part flow arrangement (3), measure outer tube (4), measure inner tube (5), vacuum pump (6) and surveying instrument (7); Described growth tube (1) bottom is provided with gas approach (8) and water out (11), top are provided with exhanst gas outlet (9) and water inlet (10); The air intake opening of described delivery line (2) is located in the growth tube (1), the gas outlet is connected with part flow arrangement (3); Described part flow arrangement (3) comprises outer escape pipe (12) and the interior escape pipe (13) that from outer to inner sets gradually, described outer escape pipe (12) is connected with measurement outer tube (4), described interior escape pipe (13) is connected with measurement inner tube (5), is provided with screen pack (14) in the described outer escape pipe (12); Described vacuum pump (6) respectively with measure outer tube (4) and be connected inner tube (5) and be connected; The detection window of described surveying instrument (7) is located at and is measured on outer tube (4) and the measurement inner tube (5).
2. the measurement mechanism of the PM2.5 distribution of particles behind the steam phase transformation condensation growth according to claim 1 is characterized in that: described measurement outer tube (4) and measure inner tube (5) and be quartz glass tube.
3. the measurement mechanism of the PM2.5 distribution of particles behind the steam phase transformation condensation growth according to claim 1 is characterized in that: the side's of being shaped as body of described measurement outer tube (4), described measurement inner tube (5) be shaped as right cylinder.
4. the measurement mechanism of the PM2.5 distribution of particles behind the steam phase transformation condensation growth according to claim 3 is characterized in that: the width of described measurement outer tube (4) and the diameter of measuring inner tube (5) are than being 5:1.
5. the measurement mechanism of the PM2.5 distribution of particles behind the steam phase transformation condensation growth according to claim 1, it is characterized in that: described surveying instrument (7) is the laser droplet collector.
6. the measurement mechanism of the PM2.5 distribution of particles behind the steam phase transformation condensation growth according to claim 1 is characterized in that: described screen pack (14) comprises suction filtering layer (15) and fine grained filtering layer (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320221678 CN203203906U (en) | 2013-04-26 | 2013-04-26 | Device for measuring distribution of PM 2.5 particles which are grown up through water vapor phase change condensation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320221678 CN203203906U (en) | 2013-04-26 | 2013-04-26 | Device for measuring distribution of PM 2.5 particles which are grown up through water vapor phase change condensation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203203906U true CN203203906U (en) | 2013-09-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320221678 Withdrawn - After Issue CN203203906U (en) | 2013-04-26 | 2013-04-26 | Device for measuring distribution of PM 2.5 particles which are grown up through water vapor phase change condensation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203203906U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103234878A (en) * | 2013-04-26 | 2013-08-07 | 东南大学 | Device and method for measuring PM (particulate matter) 2.5 particle distribution after vapor phase-change condensation growth |
-
2013
- 2013-04-26 CN CN 201320221678 patent/CN203203906U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103234878A (en) * | 2013-04-26 | 2013-08-07 | 东南大学 | Device and method for measuring PM (particulate matter) 2.5 particle distribution after vapor phase-change condensation growth |
| CN103234878B (en) * | 2013-04-26 | 2015-09-16 | 东南大学 | The measurement mechanism of the PM2.5 distribution of particles after steam phase transformation condensation growth and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130918 Effective date of abandoning: 20150916 |
|
| RGAV | Abandon patent right to avoid regrant |