CN102607897B - Active carbon box sampler with diffusion barrier - Google Patents
Active carbon box sampler with diffusion barrier Download PDFInfo
- Publication number
- CN102607897B CN102607897B CN201210060262.8A CN201210060262A CN102607897B CN 102607897 B CN102607897 B CN 102607897B CN 201210060262 A CN201210060262 A CN 201210060262A CN 102607897 B CN102607897 B CN 102607897B
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- Prior art keywords
- activated charcoal
- stainless steel
- diffusion
- stainless
- active carbon
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 81
- 238000009792 diffusion process Methods 0.000 title claims abstract description 27
- 229910052799 carbon Inorganic materials 0.000 title abstract description 7
- 230000004888 barrier function Effects 0.000 title abstract 5
- 238000005070 sampling Methods 0.000 claims abstract description 29
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 21
- 239000010935 stainless steel Substances 0.000 claims abstract description 21
- SYUHGPGVQRZVTB-UHFFFAOYSA-N radon atom Chemical compound [Rn] SYUHGPGVQRZVTB-UHFFFAOYSA-N 0.000 claims abstract description 20
- 229910052704 radon Inorganic materials 0.000 claims abstract description 19
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 18
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 9
- 238000001179 sorption measurement Methods 0.000 claims abstract description 6
- 239000004411 aluminium Substances 0.000 claims description 16
- 229910000831 Steel Inorganic materials 0.000 claims description 13
- 239000010959 steel Substances 0.000 claims description 13
- 235000013162 Cocos nucifera Nutrition 0.000 claims description 3
- 244000060011 Cocos nucifera Species 0.000 claims description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 3
- 239000003610 charcoal Substances 0.000 claims description 3
- 239000010903 husk Substances 0.000 claims description 3
- 239000000835 fiber Substances 0.000 claims description 2
- 210000004907 gland Anatomy 0.000 claims description 2
- 238000001514 detection method Methods 0.000 abstract description 5
- 238000010276 construction Methods 0.000 abstract description 3
- 238000012360 testing method Methods 0.000 description 6
- 238000010521 absorption reaction Methods 0.000 description 3
- 239000002390 adhesive tape Substances 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 101100032908 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) RAD7 gene Proteins 0.000 description 1
- 239000003463 adsorbent Substances 0.000 description 1
- 150000001398 aluminium Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000013507 mapping Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Landscapes
- Measurement Of Radiation (AREA)
- Sampling And Sample Adjustment (AREA)
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 one and detect with activated charcoal accumulated samples device for indoor radon concentration, be specifically related to a kind of activated charcoal sampling thief of building with diffusion.
Background technology
Air Radon Concentration activated charcoal used in measuring cell at present, the regulation sampling time must be at 48 ± 0.5h, and reason is that, in the time that the sampling time increases, activated charcoal water absorbing capacity is too high, make the response coefficient of radon no longer be stabilized on the coefficient of its scale, show as the unstable of testing result.When the ambient humidity of sampling is when larger, the measurement result deviation of this software is greater than ± 25% standard-required value.These shortcomings have restricted it and have used in the large sampling environment of ambient humidity.
Summary of the invention
The object of this invention is to provide a kind of activated charcoal sampling thief of building with diffusion, adopt diffusion base and sampling area size to control activated charcoal water-intake rate, is that a kind of activated charcoal detecting for room air radon concentration is surveyed radon accumulated samples device.
The object of the invention to solve the technical problems is to adopt following technical scheme to realize.A kind of activated charcoal sampling thief of building with diffusion proposing according to the present invention, comprising: the aluminium box that activated charcoal is installed; Be placed on the stainless (steel) wire on activated charcoal; The stainless steel compressing tablet that diffusion is built is installed, and this stainless steel compressing tablet is placed on stainless (steel) wire and uses locator card loop mapping; And can cover the lid of gland bonnet aluminium box.
What described activated charcoal adopted is coconut husk charcoal, and granularity, at 18～28 orders, has 1300～1400m
2the specific surface area of/g, radon adsorption coefficient is 5L/g.
Described diffusion is built and is adopted a kind of fiber filter film, and it can meet in humidity is 85%, and temperature is that under 12～25 DEG C of normal temperature conditions, the water absorbing capacity of 4 days is less than 10% requirement.
Described aluminium box is the right cylinder aluminium box of a high 4cm, diameter 8.8cm.
The diameter of described stainless steel compressing tablet is 8.8cm, and the hole of a 5cm is opened in centre, and thickness is 0.1～0.3cm.
Described stainless (steel) wire is the stainless (steel) wire that one deck has 200 order apertures.
Described snap ring is the annular iron ring of an opening, and its two ends are set to forniciform grab, described stainless steel compressing tablet can be fixed.
By technique scheme, tool of the present invention has the following advantages and beneficial effect:
1, select the activated charcoal of high absorption property as adsorbent, radon adsorption coefficient is 5L/g; Select diffusion to build meeting in humidity is 95%, and temperature is that under 12～25 DEG C of normal temperature conditions, the water absorbing capacity of 4 days is less than 10% requirement; Meanwhile, this diffusion is built the transmitance impact of radon little.
2, design stainless steel compressing tablet, by process the hole of certain size on compressing tablet, controls the amount that air enters activated charcoal, thereby can control from another point of view the water absorbing capacity of activated charcoal; Compressing tablet still spreads and builds the carrier adhering in addition.
3, the present invention is by selecting that the high activated charcoal of radon adsorption efficiency is improved to the efficiency of sampling, spread and build and change the impact on testing result of the structure decrease moisture in air of sampling thief by increase, and the back diffusion of minimizing absorption radon, carry out the detection of indoor radon concentration with such sampling thief, will improve the reliability of testing result.
4, sampling thief of the present invention is suitable for the testing of a large amount of Indoor Niton of current construction project, and testing result is stable, simple to operate, saves a large amount of manpowers.
Brief description of the drawings
Fig. 1 is STRUCTURE DECOMPOSITION schematic diagram of the present invention.
Fig. 2 is one-piece construction schematic diagram of the present invention.
10: aluminium box 11: lid
20: activated charcoal 30: stainless (steel) wire
41: diffusion builds 40: stainless steel compressing tablet
50: snap ring 51: grab
Embodiment
Below in conjunction with accompanying drawing and preferred embodiment, the present invention is expressed in further detail, but the present invention is not limited in following embodiment.
Refer to shown in Fig. 1 and 2, a kind of activated charcoal sampling thief of building with diffusion of the present invention, comprise the aluminium box 10 with cover container as acticarbon, activated charcoal 20 (weight 80g) is contained in this aluminium box 10, stainless (steel) wire 30 for fixing activated charcoal is installed again, next dress is stained with the stainless steel compressing tablet 40 at diffusion base 41, and then the snap ring 50 for locating is installed on this stainless steel compressing tablet 40, finally adds the lid 11 of aluminium box 10.The Main Function at diffusion base 41 is to stop entering of water in air part, and stainless steel compressing tablet 40, except the carrier of building as diffusion, can also also can be controlled entering of water in air part by the size of compressing tablet medium pore.
Aluminium box 10 used is high 4cm, and the aluminium box of diameter 8.8cm, adds lid 11 above.The activated charcoal 20 adopting is coconut husk charcoals, and granularity, at 18～28 orders, has 1300～1400m
2the specific surface area of/g, radon adsorption coefficient reaches 5L/g.This stainless (steel) wire 30 is one deck 200 object stainless (steel) wires.Described stainless steel compressing tablet 40 its diameters are 8.8cm, and the hole of a 5cm is opened in centre, and thickness is 0.1～0.3cm.This diffusion is built 41 and is adopted a kind of tunica fibrosa, and it can meet in humidity is 85%, and temperature is that under 12～25 DEG C of normal temperature conditions, the water absorbing capacity of 4 days is less than 10% requirement.Meanwhile, it is little that 41 impacts of the transmitance on radon are built in this diffusion.Described snap ring 50 is one section of annular iron ring with opening, and its two ends are set to forniciform grab 51, can be by fixing described stainless steel compressing tablet 40.
Specific embodiment is installed
Installation and application of the present invention can be expressed as follows:
1, activated charcoal mounted box: activated charcoal 20 is toasted more than 12 hours at 120 DEG C of temperature, 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, then the snap ring 50 for locating is installed, after lid lid, aluminium box 10 is sealed with adhesive tape, and numbering.
2, lay activated charcoal sampling thief: tear adhesive tape in sampling room, the 11 start-of-record sampling times of uncap (be accurate to point, record time-division date).
3, recovered carbon sampling thief: to the sampling time of regulation, after lid lid with adhesive tape by the sealing of charcoal box, the end of record (EOR) sampling time (be accurate to point) simultaneously.
4, measure: reclaim after 3 hours, use
the low background multiple tracks gamma energy spectrometer of detector and multichannel analyzer composition is measured.When measurement, sampling thief is placed on NaI detector.Each sample measurement 20min.The activity of radon is to use
214295KeV, the 351KeV of Pb and
214tri-all-round absorption peak areas (cpm) of 609KeV of Bi are definite.
application Example
We put into existing activated charcoal the newly-built building in Guangzhou and carry out Practical Project detection together with activated charcoal sampling thief of the present invention, carry out Simultaneous Monitoring with U.S. RAD7 simultaneously.Measured result sees the following form 1:
Table 1 activated charcoal sampling thief of the present invention contrasts with existing activated charcoal testing result
The above, it is only preferred embodiment of the present invention, not the present invention is done to any pro forma restriction, do not depart from technical solution of the present invention content therefore every, any simple modification, equivalent variations and the modification above embodiment done according to technical spirit of the present invention, all still belong in the scope of technical solution of the present invention.
Claims (5)
1. an activated charcoal sampling thief of building with diffusion, is characterized in that it comprises: the aluminium box that activated charcoal is installed; Be placed on the stainless (steel) wire on activated charcoal; The stainless steel compressing tablet that diffusion is built is installed, and this stainless steel compressing tablet is placed on stainless (steel) wire and locates with snap ring; And can cover the lid of gland bonnet aluminium box; Described diffusion is built and is adopted a kind of fiber filter film, and it can meet in humidity is 85%, and temperature is that under 12～25 DEG C of normal temperature conditions, the water absorbing capacity of 4 days is less than 10% requirement; What described activated charcoal adopted is coconut husk charcoal, and granularity, at 18～28 orders, has 1300～1400m
2the specific surface area of/g, radon adsorption coefficient is 5L/g.
2. activated charcoal sampling thief according to claim 1, is characterized in that: described aluminium box is the right cylinder aluminium box of a high 4cm, diameter 8.8cm.
3. activated charcoal sampling thief according to claim 1, is characterized in that: the diameter of described stainless steel compressing tablet is 8.8cm, and the hole of a 5cm is opened in centre, and thickness is 0.1～0.3cm.
4. activated charcoal sampling thief according to claim 1, is characterized in that: described stainless (steel) wire is the stainless (steel) wire that one deck has 200 order apertures.
5. activated charcoal sampling thief according to claim 1, is characterized in that: described snap ring is the annular iron ring of an opening, and its two ends are set to forniciform grab, described stainless steel compressing tablet can 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 |
Applications Claiming Priority (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 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102607897A CN102607897A (en) | 2012-07-25 |
| CN102607897B true 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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Families Citing this family (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 |
| 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 |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5065030A (en) * | 1990-09-10 | 1991-11-12 | Brandeis University | Radon detectors |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4880973A (en) * | 1988-07-15 | 1989-11-14 | Reynolds John D | Ground radon flux sampling device |
| 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 |
| 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 |
-
2012
- 2012-03-08 CN CN201210060262.8A patent/CN102607897B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5065030A (en) * | 1990-09-10 | 1991-11-12 | Brandeis University | Radon detectors |
Non-Patent Citations (2)
| Title |
|---|
| 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》.1988,第12卷(第4期),第193-198页. |
| 空气中222Rn的累积测量法;姜会侠等;《国外医学放射医学与核医学分册》;19881231;第12卷(第4期);第193-198页 * |
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| CN102607897A (en) | 2012-07-25 |
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