CN102607897A - Active carbon box sampler with diffusion barrier - Google Patents
Active carbon box sampler with diffusion barrier Download PDFInfo
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- CN102607897A CN102607897A CN2012100602628A CN201210060262A CN102607897A CN 102607897 A CN102607897 A CN 102607897A CN 2012100602628 A CN2012100602628 A CN 2012100602628A CN 201210060262 A CN201210060262 A CN 201210060262A CN 102607897 A CN102607897 A CN 102607897A
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- activated charcoal
- stainless steel
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- sampling thief
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Abstract
The invention discloses an active carbon box sampler with a diffusion barrier, which comprises a circular aluminum cover with a cover, the diffusion barrier, a stainless steel pressing sheet, a stainless steel net, a location snap ring and active carbon, wherein the active carbon is arranged in the aluminum box, the stainless steel net is placed on the active carbon, and the stainless steel pressing sheet provided with the diffusion barrier is placed on the stainless steel net and is located by the location snap ring and then sealed by the cover. In the invention, the sampling efficiency is increased through selecting the active carbon with high radon adsorption efficiency, the influence of water in the air to a detection result is reduced through additionally arranging the diffusion barrier and changing the structure of the sample, and reverse diffusion of radon is reduced; and the concentration of the radon in a room is detected by using the sampler disclosed by the invention, thus the reliability of the detection result is improved. The sampler is suitable for massively detecting the radon in the room for a current construction project, and has the advantages of stable detection result, simplicity in operation, saving of a great quantity of manpower works, and the like.
Description
Technical field
The invention belongs to environmental protection technical field, especially relate to a kind of room air radon concentration that is used for and detect, be specifically related to a kind of activated charcoal sampling thief that diffusion is built that has with activated charcoal accumulated samples device.
Background technology
Measure the used activated charcoal of radon concentration in the room air at present; The regulation sampling time must be at 48 ± 0.5h, and reason is that when the sampling time increased, the activated charcoal water absorbing capacity was too high; Feasible response coefficient to radon no longer is stabilized on the coefficient of its scale, shows as the instability of testing result.When the ambient humidity of sampling was big, the measurement result deviation of this software was greater than ± 25% standard-required value.These shortcomings have restricted it and in the big sampling environment of ambient humidity, have used.
Summary of the invention
The purpose of this invention is to provide a kind of activated charcoal sampling thief that has the diffusion base, adopt diffusion base and sampling area size to control the activated charcoal water-intake rate, is a kind of activated charcoal survey radon accumulated samples device that room air radon concentration detects that is used for.
The object of the invention and to solve its technical matters be that technical scheme below adopting realizes.A kind of activated charcoal sampling thief that has the diffusion base according to the present invention proposes comprises: the aluminium box that activated charcoal is installed; Be placed on the stainless (steel) wire on the activated charcoal; The stainless steel compressing tablet that diffusion is built is installed, and this stainless steel compressing tablet is placed on the stainless (steel) wire and uses the locator card loop mapping; And the lid that can cover gland bonnet aluminium box.
What said activated charcoal adopted is the coconut husk charcoal, and granularity has 1300～1400m at 18～28 orders
2The specific surface area of/g, radon adsorption coefficient are 5L/g.
Said diffusion is built and is adopted a kind of fiber filter film, and it can satisfy in humidity is 85%, and temperature is that 4 days water absorbing capacity is less than 10% requirement under 12～25 ℃ of normal temperature conditions.
Said aluminium box is the right cylinder aluminium box of a high 4cm, diameter 8.8cm.
The diameter of said stainless steel compressing tablet is 8.8cm, and the hole of a 5cm is opened in the centre, and thickness is 0.1～0.3cm.
Said stainless (steel) wire is the stainless (steel) wire that one deck has 200 order apertures.
Said snap ring is the annular iron ring of an opening, and its two ends are set to forniciform grab, can said stainless steel compressing tablet be fixed.
By technique scheme, the present invention has following advantage and beneficial effect:
1, the activated charcoal of selecting high absorption property is as adsorbent, and the radon adsorption coefficient is 5L/g; Select diffusion to build satisfying in humidity is 95%, and temperature is that 4 days water absorbing capacity is less than 10% requirement under 12～25 ℃ of normal temperature conditions; Simultaneously, this diffusion is built the transmitance influence of radon little.
2, design stainless steel compressing tablet, through the hole of processing certain size on compressing tablet, control air gets into the amount of activated charcoal, thereby can control the water absorbing capacity of activated charcoal from another point of view; Compressing tablet still spreads and builds the carrier that adheres in addition.
3, the present invention is through selecting that the high activated charcoal of radon adsorption efficiency is improved the efficient of sampling; Diffusion is built and the structure decrease water in air of change sampling thief is divided the influence to testing result through increasing; And the back diffusion of minimizing absorption radon; Carry out the detection of indoor radon concentration with such sampling thief, with the reliability that improves testing result.
4, sampling thief of the present invention is suitable for the testing of a large amount of Indoor Niton of present construction project, and testing result is stable, simple to operate, practices thrift great amount of manpower.
Description of drawings
Fig. 1 is a STRUCTURE DECOMPOSITION synoptic diagram of the present invention.
Fig. 2 is an one-piece construction synoptic diagram of the present invention.
10: aluminium box 11: lid
20: activated charcoal 30: stainless (steel) wire
41: diffusion builds 40: the stainless steel compressing tablet
50: snap ring 51: grab
Embodiment
Below in conjunction with accompanying drawing and preferred embodiment the present invention is made further detailed presentations, but the present invention is not limited in following embodiment.
See also shown in Fig. 1 and 2; A kind of activated charcoal sampling thief that has the diffusion base of the present invention comprises aluminium box 10 with cover container as acticarbon, and activated charcoal 20 (weight 80g) is contained in this aluminium box 10; The stainless (steel) wire 30 that is used for fixing activated charcoal is installed again; Next dress is stained with the stainless steel compressing tablet 40 at diffusion base 41, and the snap ring 50 that is used to locate is installed on this stainless steel compressing tablet 40 then, adds the lid 11 of aluminium box 10 at last.Diffusion 41 the main effect of building is the entering that stops water in air part, stainless steel compressing tablet 40 except the carrier of building as diffusion, size that can also be through the compressing tablet medium pore also can control air in the entering of moisture content.
Used aluminium box 10 is high 4cm, and the aluminium box of diameter 8.8cm adds lid 11 above.The activated charcoal 20 that adopts is coconut husk charcoals, and granularity has 1300～1400m at 18～28 orders
2The specific surface area of/g, the radon adsorption coefficient reaches 5L/g.This stainless (steel) wire 30 is one deck 200 purpose stainless (steel) wires.Said stainless steel compressing tablet 40 its diameters are 8.8cm, and the hole of a 5cm is opened in the centre, and thickness is 0.1～0.3cm.This diffusion is built 41 and is adopted a kind of tunica fibrosa, and it can satisfy in humidity is 85%, and temperature is that 4 days water absorbing capacity is less than 10% requirement under 12～25 ℃ of normal temperature conditions.Simultaneously, the transmitance influence of these 41 pairs of radons in diffusion base is little.Said snap ring 50 is one section annular iron ring with opening, and its two ends are set to forniciform grab 51, can said stainless steel compressing tablet 40 be fixed.
Specific embodiment is installed
Installation and application of the present invention can be explained as follows:
1, activated charcoal dress box: activated charcoal 20 was toasted under 120 ℃ of temperature more than 12 hours, claim that 80g puts into aluminium box 10, activated charcoal 20 surfaces are paved with spoon; Put into stainless (steel) wire 30; Next the stainless steel compressing tablet 40 that is stained with diffusion base 41 is installed, the snap ring 50 that is used to locate is installed then, behind the lid lid; With adhesive tape aluminium box 10 is sealed, and numbering.
2, lay the activated charcoal sampling thief: tear adhesive tape in the sampling room, the 11 start-of-record sampling times of uncap (being accurate to branch, record time-division date).
3, recovered carbon sampling thief: arrive the sampling time of regulation, lid lid back seals the charcoal box with adhesive tape, simultaneously the end of record (EOR) sampling time (being accurate to branch).
4, measure: reclaim after 3 hours, measure with the low background multiple tracks gamma energy spectrometer that
detector and multichannel analyzer are formed.Sampling thief places on the NaI detector during measurement.Each sample measurement 20min.The activity of radon is to use
214The 295KeV of Pb, 351KeV and
214Three all-round absorption peak areas (cpm) of the 609KeV of Bi are definite.
The application implementation example
We put into the newly-built building in Guangzhou with existing activated charcoal with activated charcoal sampling thief of the present invention and carry out actual engineering detecting, carry out synchronous monitoring with U.S. RAD7 simultaneously.Measured result sees the following form 1:
Table 1 activated charcoal sampling thief of the present invention and the contrast of existing activated charcoal testing result
The above; It only is preferred embodiment of the present invention; Be not that the present invention is done any pro forma restriction; Former every technical scheme content of the present invention that do not break away from, all still belongs in the scope of technical scheme of the present invention any simple modification, equivalent variations and modification that above embodiment did according to technical spirit of the present invention.
Claims (7)
1. one kind has the activated charcoal sampling thief that diffusion is built, and it is characterized in that it comprises: the aluminium box that activated charcoal is installed; Be placed on the stainless (steel) wire on the activated charcoal; The stainless steel compressing tablet that diffusion is built is installed, and this stainless steel compressing tablet is placed on the stainless (steel) wire and with snap ring locatees; And the lid that can cover gland bonnet aluminium box.
2. activated charcoal sampling thief according to claim 1 is characterized in that: what said activated charcoal adopted is the coconut husk charcoal, and granularity has 1300～1400m at 18～28 orders
2The specific surface area of/g, radon adsorption coefficient are 5L/g.
3. activated charcoal sampling thief according to claim 1 is characterized in that: said diffusion is built and is adopted a kind of fiber filter film, and it can satisfy in humidity is 85%, and temperature is that 4 days water absorbing capacity is less than 10% requirement under 12～25 ℃ of normal temperature conditions.
4. activated charcoal sampling thief according to claim 1 is characterized in that: said aluminium box is the right cylinder aluminium box of a high 4cm, diameter 8.8cm.
5. activated charcoal sampling thief according to claim 1 is characterized in that: the diameter of said stainless steel compressing tablet is 8.8cm, and the hole of a 5cm is opened in the centre, and thickness is 0.1～0.3cm.
6. activated charcoal sampling thief according to claim 1 is characterized in that: said stainless (steel) wire is the stainless (steel) wire that one deck has 200 order apertures.
7. activated charcoal sampling thief according to claim 1 is characterized in that: said snap ring is the annular iron ring of an opening, and its two ends are set to forniciform grab, can said stainless steel compressing tablet be fixed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210060262.8A CN102607897B (en) | 2012-03-08 | 2012-03-08 | Active carbon box sampler with diffusion barrier |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210060262.8A CN102607897B (en) | 2012-03-08 | 2012-03-08 | Active carbon box sampler with diffusion barrier |
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| CN102607897A true CN102607897A (en) | 2012-07-25 |
| CN102607897B CN102607897B (en) | 2014-07-16 |
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| CN201210060262.8A Active CN102607897B (en) | 2012-03-08 | 2012-03-08 | Active carbon box sampler with diffusion barrier |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103969093A (en) * | 2014-05-08 | 2014-08-06 | 李海涛 | Gas adsorption sampling device |
| CN104977185A (en) * | 2015-07-03 | 2015-10-14 | 农业部亚热带果品蔬菜质量监督检验测试中心 | Farmland irrigation water sampling method |
| CN109323894A (en) * | 2018-10-09 | 2019-02-12 | 核工业北京化工冶金研究院 | A kind of sampling apparatus for radon concentration monitoring inside smashed radioactive material |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4880973A (en) * | 1988-07-15 | 1989-11-14 | Reynolds John D | Ground radon flux sampling device |
| US5065030A (en) * | 1990-09-10 | 1991-11-12 | Brandeis University | Radon detectors |
| CN2833557Y (en) * | 2005-09-15 | 2006-11-01 | 核工业北京地质研究院 | Active carbon box for measuring atmospheric radon |
| CN2849694Y (en) * | 2005-09-15 | 2006-12-20 | 核工业北京地质研究院 | Active carbon box for testing soil radon |
-
2012
- 2012-03-08 CN CN201210060262.8A patent/CN102607897B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4880973A (en) * | 1988-07-15 | 1989-11-14 | Reynolds John D | Ground radon flux sampling device |
| US5065030A (en) * | 1990-09-10 | 1991-11-12 | Brandeis University | Radon detectors |
| CN2833557Y (en) * | 2005-09-15 | 2006-11-01 | 核工业北京地质研究院 | Active carbon box for measuring atmospheric radon |
| CN2849694Y (en) * | 2005-09-15 | 2006-12-20 | 核工业北京地质研究院 | Active carbon box for testing soil radon |
Non-Patent Citations (3)
| Title |
|---|
| 《国外医学放射医学与核医学分册》 19881231 姜会侠等 空气中222Rn的累积测量法 第193-198页 1-7 第12卷, 第4期 * |
| BERNARD L.COHEN ET AL.: "a diffusion barrier charcoal adsorption collector for measuring Rn concentrations in indoor air", 《HEALTH PHYSICS》, vol. 50, no. 4, 30 April 1986 (1986-04-30), pages 457 - 463 * |
| 姜会侠等: "空气中222Rn的累积测量法", 《国外医学放射医学与核医学分册》, vol. 12, no. 4, 31 December 1988 (1988-12-31), pages 193 - 198 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103969093A (en) * | 2014-05-08 | 2014-08-06 | 李海涛 | Gas adsorption sampling device |
| CN104977185A (en) * | 2015-07-03 | 2015-10-14 | 农业部亚热带果品蔬菜质量监督检验测试中心 | Farmland irrigation water sampling method |
| CN109323894A (en) * | 2018-10-09 | 2019-02-12 | 核工业北京化工冶金研究院 | A kind of sampling apparatus for radon concentration monitoring inside smashed radioactive material |
| CN109323894B (en) * | 2018-10-09 | 2021-05-18 | 核工业北京化工冶金研究院 | Sampling device for measuring radon concentration in broken emanation medium |
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| Publication number | Publication date |
|---|---|
| CN102607897B (en) | 2014-07-16 |
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