CN211697121U - Sampling carbon box for iodine adsorber efficiency test - Google Patents
Sampling carbon box for iodine adsorber efficiency test Download PDFInfo
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- CN211697121U CN211697121U CN201921981971.3U CN201921981971U CN211697121U CN 211697121 U CN211697121 U CN 211697121U CN 201921981971 U CN201921981971 U CN 201921981971U CN 211697121 U CN211697121 U CN 211697121U
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- end cover
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- carbon
- efficiency test
- iodine adsorber
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Abstract
The utility model provides a sampling carbon box for iodine adsorber efficiency test, it includes upper end cover, lower end cover, active carbon and is used for holding the neck bush ring of active carbon, the up end of upper end cover and the bottom end face of lower end cover are formed with a plurality of evenly arranged meshs respectively, the upper and lower both ends of neck bush ring are installed in upper end cover and lower end cover through being provided with filter paper respectively; according to the scheme, the sampling carbon box is characterized in that activated carbon is placed in an inner bushing ring, the inner bushing ring is placed in an upper end cover and a lower end cover which are arranged up and down through filter paper, and meanwhile, in order to ensure ventilation, a plurality of meshes are arranged on the end faces of the upper end cover and the lower end cover; in the process of filtering the test gas, on one hand, the smooth entering of the gas is ensured, meanwhile, the leakage of the activated carbon is also prevented, and the whole structure is fast and simple to manufacture.
Description
Technical Field
The utility model relates to a nuclear field radioactive gas collection equipment technical field, concretely relates to sampling carbon box for in iodine adsorber efficiency test.
Background
The radioactive iodine is one of main source items of the process waste gas of the nuclear facility, and the radioactive iodine in the waste gas is purified by adopting the iodine adsorber in the nuclear facility, so that the iodine adsorber is a key device in a nuclear air purification system, and the reliability of the iodine adsorber has important significance for the safe operation of the nuclear facility. In order to ensure the safe and reliable operation of the nuclear air purification system, a field efficiency test needs to be carried out on a newly installed iodine adsorber before operation, and the field efficiency test needs to be carried out on the installed iodine adsorber periodically after the iodine adsorber is operated for a period of time.
The method for testing the efficiency of the iodine adsorber of the nuclear facility in China mainly adopts a Freon method and a radioactive methyl iodine method. The radioactive methyl iodine method mainly uses I-131 traced methyl iodine as indicator, and uses methyl iodine generator to inject it into tested ventilation system, and respectively uses sampling devices with sampling clamps to make sampling at upstream and downstream, and the sampling clamps are equipped with active carbon boxes for test, and when the radioactive gas in the air channel is passed through the sampling device, it is adsorbed by the sampling carbon boxes, then uses gamma spectrometer to measure sample, and compares the activity of the active carbon boxes at upstream and downstream to calculate adsorption efficiency of iodine adsorber. In addition, nuclear facilities also require sample collection using a sampling charcoal box when detecting radioactivity levels in the plant air. When the traditional carbon box is installed, an adhesive is required to be coated on the inner edges of the upper end cover and the lower end cover for bonding, the requirement on workers is high in the process, if the adhesive is coated too little, the carbon box filter paper is easy to fall off, and if the adhesive is coated too much, the pore passages of the filter paper are likely to be blocked, so that the problem of overlarge pressure drop or even incapability of use is caused.
Disclosure of Invention
To the defect that exists among the prior art, the utility model aims to provide a sampling carbon box for among iodine adsorber efficiency test, its structural design of this sampling carbon box is reasonable, and air resistance is little and production easy operation.
In order to achieve the above object, the utility model adopts the following technical scheme:
the utility model provides a sampling charcoal box for among iodine adsorber efficiency test, sampling charcoal box includes upper end cover, lower end cover, active carbon and is used for holding the interior bush ring of active carbon, the up end of upper end cover and the bottom face of lower end cover are the shaping respectively has a plurality of meshes of evenly arranging, both ends are installed through the filter paper that is provided with respectively about the interior bush ring in upper end cover and the lower end cover.
Further, the end faces of the upper end cover and the lower end cover are provided with annular grooves, wherein the edges of the upper end and the lower end of the lining lantern ring are correspondingly clamped in the annular grooves of the upper end cover and the lower end cover.
Furthermore, the upper end cover, the lower end cover and the inner bushing ring are made of polypropylene materials.
Further, the active carbon is 40-60 mesh coconut shell active carbon.
The scheme has the beneficial technical effects that: according to the scheme, the sampling carbon box is characterized in that activated carbon is placed in an inner bushing ring, the inner bushing ring is placed in an upper end cover and a lower end cover which are arranged up and down through filter paper, and meanwhile, in order to ensure ventilation, a plurality of meshes are arranged on the end faces of the upper end cover and the lower end cover; in the process of filtering the test gas, on one hand, the smooth entering of the gas is ensured, meanwhile, the leakage of the activated carbon is also prevented, and the whole structure is fast and simple to manufacture.
Drawings
FIG. 1 is a schematic view of a sampling carbon cartridge mounting and assembling structure in this embodiment;
FIG. 2 is a longitudinal sectional view of the upper end cap in the present embodiment;
fig. 3 is a schematic top view of the upper end cap in this embodiment.
In the figure:
1-upper end cover, 2-inner liner lantern ring, 3-lower end cover, 4-upper filter paper, 5-lower filter paper, 6-active carbon, 7-annular groove and 8-mesh.
Detailed Description
The present invention will be described in further detail with reference to the drawings and the following detailed description.
Referring to fig. 1 to 3, the sampling carbon box for use in an efficiency test of an iodine adsorber in the present embodiment includes an upper end cap 1, a lower end cap 3, activated carbon 6, and an inner liner ring 2 for containing the activated carbon 6, where the upper end cap 1, the lower end cap 3, and the inner liner ring 2 in the present embodiment are preferably made of polypropylene. The upper end face of the upper end cover 1 and the bottom end face of the lower end cover 3 are respectively formed with a plurality of uniformly arranged meshes 8 for ensuring the ventilation area of the whole sampling carbon box, and the upper end and the lower end of the inner bushing ring 2 are respectively installed in the upper end cover 1 and the lower end cover 3 through the arranged filter paper (the shape of the filter paper installed in the upper end cover 1 is matched with that of the upper end cover 1 and is called as upper filter paper 4 for short; the same filter paper installed in the lower end cover 3 is called as lower filter paper 5 for short); filter paper is used to seal the upper and lower ends of the liner collar 2 to prevent leakage through the mesh 8.
In order to achieve a better sealing effect, the end faces of the upper end cover 1 and the lower end cover 3 in the embodiment are provided with annular grooves 7, the upper end and the lower end of the lining sleeve are respectively clamped into the annular grooves 7 on the end faces of the upper end cover 1 and the lower end cover 3, on one hand, the lining sleeve can play a role in fixing filter paper, and on the other hand, the lining sleeve can prevent air from leaking along the edge arms, so that a good sealing effect is obtained.
The active carbon 6 in the embodiment adopts 40-60 mesh coconut shell active carbon, and the active carbon 6 is sieved to remove fine carbon powder. The carbon loading amount is moderate in practice, so that the compactness can be ensured, and the situation that the carbon cannot be compacted due to too much carbon loading amount is generally about 19 g in practice; of course, the actual loading is adjusted to the actual.
During production, firstly, one to two layers of circular filter paper are padded on the end face of the inner side of the upper end cover 1, and the diameter part of the filter paper is smaller than the inner diameter of the lower end cover 3 so as to ensure the sealing effect; the inner bushing ring 2 is placed in the lower end cover 3, the edge of the circular filter paper is clamped into the annular groove 7, then the activated carbon 6 is filled into the inner bushing ring 2, the activated carbon 6 is tightly filled through slight vibration, one to two layers of circular filter paper are covered on the upper surface of the activated carbon 6 layer, the upper end cover 1 is covered, the circular filter paper is pressed tightly, and the upper end cover 3 and the lower end cover 3 are bonded through 502 glue; thereby completing the whole manufacturing process of the sampling carbon box.
It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalent technologies, the present invention is also intended to include such modifications and variations.
Claims (4)
1. A sampling charcoal box for iodine adsorber efficiency test which characterized in that: the sampling carbon box comprises an upper end cover, a lower end cover, activated carbon and an inner bushing ring used for containing the activated carbon, wherein a plurality of uniformly-arranged meshes are formed in the upper end face of the upper end cover and the bottom end face of the lower end cover respectively, and the upper end and the lower end of the inner bushing ring are installed in the upper end cover and the lower end cover respectively through filter paper arranged on the upper end and the lower end of the inner bushing ring.
2. A sampling carbon cartridge for use in an efficiency test of an iodine adsorber according to claim 1, wherein: and the end surfaces of the upper end cover and the lower end cover are provided with annular grooves, wherein the edges of the upper end and the lower end of the liner lantern ring are correspondingly clamped in the annular grooves of the upper end cover and the lower end cover.
3. A sampling carbon cartridge for use in an iodine adsorber efficiency test as claimed in claim 1 or claim 2 wherein: the upper end cover, the lower end cover and the inner bushing ring are made of polypropylene materials.
4. A sampling carbon cartridge for use in an efficiency test of an iodine adsorber according to claim 1, wherein: the active carbon is 40-60 mesh coconut shell active carbon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921981971.3U CN211697121U (en) | 2019-11-15 | 2019-11-15 | Sampling carbon box for iodine adsorber efficiency test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921981971.3U CN211697121U (en) | 2019-11-15 | 2019-11-15 | Sampling carbon box for iodine adsorber efficiency test |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211697121U true CN211697121U (en) | 2020-10-16 |
Family
ID=72787112
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921981971.3U Active CN211697121U (en) | 2019-11-15 | 2019-11-15 | Sampling carbon box for iodine adsorber efficiency test |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211697121U (en) |
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2019
- 2019-11-15 CN CN201921981971.3U patent/CN211697121U/en active Active
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