CN217688091U

CN217688091U - Collecting device for atmospheric particulate iodine-129 and gaseous iodine-129

Info

Publication number: CN217688091U
Application number: CN202220715539.5U
Authority: CN
Inventors: 张路远; 张通; 陈宁; 程鹏
Original assignee: Institute of Earth Environment of CAS
Current assignee: Institute of Earth Environment of CAS
Priority date: 2022-03-30
Filing date: 2022-03-30
Publication date: 2022-10-28
Anticipated expiration: 2032-03-30

Abstract

The utility model discloses a collecting device for atmospheric particulate iodine-129 and gaseous iodine-129, which comprises a rain cover, wherein the lower end of the rain cover is provided with a filter screen, a collecting mechanism for collecting iodine-129 in gas is arranged at the lower side of the filter screen at the lower end of the rain cover, and the lower end of the collecting mechanism is provided with a connecting rod; the collecting mechanism comprises a first connecting ring, a primary filter membrane is arranged on the inner side of the first connecting ring, and a first sealing ring is arranged at the upper end of the primary filter membrane and positioned on the upper side of the first connecting ring. The utility model discloses an atmospheric air current gets into collection mechanism inboard from the filter screen of rain-proof cover downside, granule combines attitude iodine to collect in the gas in the one-level filter membrane, later second grade flooding filter membrane is collected inorganic gaseous state iodine-129, last tertiary activated carbon box is collected organic gaseous state iodine-129, realize atmospheric particulate attitude, inorganic gaseous state and organic gaseous state iodine-129's collection and monitoring, reach more excellent monitoring lower limit, and collection mechanism reuse, easily change filter membrane and activated carbon box.

Description

Collecting device for atmospheric particulate iodine-129 and gaseous iodine-129

Technical Field

The utility model relates to an atmospheric radiation monitoring field especially relates to an atmospheric particulate state and gaseous state iodine-129's collection system.

Background

Iodine is an important nutrient element, the geochemical behavior of iodine is closely related to human health, and therefore, the research on the distribution, source and circulation of iodine in the environment is very important. As nuclear energy develops, the nuclear fission process produces large quantities of radioactive iodine, with long-lived iodine-129, with half-lives of 15.7 million years, having higher fission yields. Although most of the iodine-129 produced by nuclear reactors is enclosed within the nuclear fuel cladding, it is released to the environment by nuclear fuel assembly breakage, spent fuel storage and transportation, nuclear fuel reprocessing processes, and the like. These iodine-129 are released into the environment and enter the body through the food chain. Iodine-129 is a concern in the nuclear environment for human survival as its content in the environment increases substantially beyond a certain level, causing harm to the health of animals and humans. Besides the important significance in the field of nuclear environment safety monitoring, iodine-129 has the environmental characteristics of volatility, high chemical activity and the like, and is also an ideal tracer in environmental process research in the fields of marine science, atmospheric science and the like. In summary, it is necessary to develop research and development related technologies for monitoring the iodine-129 level in current environmental atmospheric samples.

The radioactive iodine-129 exists in various forms, and can exist in the forms of ions, particles, gases and the like in water zones, rock zones, biospheres and atmospheric zones. The iodine-129 in the atmosphere can be transported in the global range along with the circulation of the atmosphere, and the migration speed is extremely high. During the fukushima nuclear accident in 2011, gaseous iodine-129 generated by the explosion of the fukushima nuclear power station reactor crossed the pacific to north america for one week and crossed the atlantic to european areas after about two weeks under the action of the westward circulation. However, the research on atmospheric iodine-129 is still relatively rare, and the research is mainly directed to the particle-bound iodine-129 and the research is rarely directed to the morphology of atmospheric iodine-129.

To perform morphological studies of atmospheric radioactive iodine-129, the sampling device problem needs to be solved first. At present, no acquisition device specially aiming at the form of atmospheric iodine-129 exists, so that the form distribution and the radiation hazard degree of the atmospheric iodine-129 cannot be researched.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the above problems and provide a collection device for atmospheric particulate iodine and gaseous iodine-129.

The utility model discloses a following technical scheme realizes above-mentioned purpose:

the collecting device for the atmospheric particulate and gaseous iodine-129 comprises a rain cover, wherein a filter screen is arranged at the lower end of the rain cover, a collecting mechanism for collecting the iodine-129 in the gas is arranged at the lower end of the rain cover, which is positioned at the lower side of the filter screen, and a connecting rod is arranged at the lower end of the collecting mechanism; gather the mechanism and include first adapter ring, first adapter ring inboard is provided with the one-level filter membrane, one-level filter membrane upper end is located first adapter ring upside is provided with first sealing washer, first adapter ring lower extreme is connected with the second adapter ring, second adapter ring inboard is provided with second grade flooding filter membrane, second grade flooding filter membrane upper end is located second adapter ring upside is provided with the second sealing washer, second adapter ring lower extreme is provided with the sampling iodine box, the sampling iodine box inboard is provided with tertiary activated carbon box, the inside active carbon granule of packing of tertiary activated carbon box, tertiary activated carbon box upper end is located sampling iodine box upside is provided with the third sealing washer.

Further setting: the primary filter membrane and the secondary dipping filter membrane are both annular, and the outer diameter of the primary filter membrane, the outer diameter of the secondary dipping filter membrane and the outer diameter of the sampling iodine box are all 90mm.

So set up, make the suction gas from the upside loop through the one-level filter membrane, second grade flooding filter membrane, tertiary activated carbon box inside active carbon granule gathers the filtration.

Further setting: the first sealing ring, the second sealing ring and the third sealing ring are all O-shaped sealing rings.

According to the arrangement, the connecting pieces are sealed through the first sealing ring, the second sealing ring and the third sealing ring.

Further setting: the first connecting ring is in threaded connection with the rain cover, the second connecting ring is in threaded connection with the first connecting ring, and the sampling iodine box is in threaded connection with the second connecting ring.

So set up, be convenient for between the adjacent connection dismantlement, improve the convenience in use.

Further setting: the connecting rod with sampling iodine box threaded connection guarantees the gas tightness through an O type sealing washer, connecting rod lower extreme threaded connection sampling pump.

So set up, make the connecting rod with sampling iodine box firm in connection, through adopting the pump with gaseous downside suction, make gaseous from the top down remove.

Compared with the prior art, the beneficial effects of the utility model are as follows:

the atmospheric air flow enters the inner side of the collecting mechanism from the filter screen on the lower side of the rain cover, the primary filter membrane collects and collects the particle-bound iodine in the air, then the secondary impregnated filter membrane collects the inorganic gaseous iodine-129, and finally the tertiary activated carbon filter membrane collects the organic gaseous iodine-129, so that the collection and monitoring of the atmospheric particle iodine, the inorganic gaseous iodine-129 and the organic gaseous iodine-129 are realized, a more optimal monitoring lower limit is reached, the collecting mechanism can be repeatedly used, and the filter membrane is easy to replace.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.

FIG. 1 is an isometric view of a collection device for atmospheric particulate and gaseous iodine-129 in accordance with the present invention;

fig. 2 is a schematic diagram of a main sectional structure of the collecting device for atmospheric particulate and gaseous iodine-129 according to the present invention;

fig. 3 is a schematic diagram of an explosion structure of the collecting device for atmospheric particulate and gaseous iodine-129 according to the present invention.

The reference numerals are illustrated below:

1. a rain cover; 2. filtering with a screen; 3. a collection mechanism; 31. a first connecting ring; 32. a first-stage filter membrane; 33. a first seal ring; 34. a second connection ring; 35. second-stage dipping filter membranes; 36. a second seal ring; 37. sampling an iodine box; 38. a third-stage activated carbon box; 39. a third seal ring; 4. a connecting rod.

Detailed Description

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

The present invention will be further explained with reference to the accompanying drawings:

as shown in fig. 1-3, the collecting device for atmospheric particulate and gaseous iodine-129 comprises a rain cover 1 for protecting a collecting mechanism 3 from rain, wherein a filter screen 2 is arranged at the lower end of the rain cover 1, the collecting mechanism 3 for collecting iodine-129 in gas is arranged at the lower end of the rain cover 1 and positioned below the filter screen 2, and a connecting rod 4 is arranged at the lower end of the collecting mechanism 3; the collecting mechanism 3 comprises a first connecting ring 31, a first-stage filter membrane 32 is arranged on the inner side of the first connecting ring 31, a first sealing ring 33 is arranged at the upper end of the first-stage filter membrane 32 and positioned on the upper side of the first connecting ring 31, a second connecting ring 34 is connected to the lower end of the first connecting ring 31, a second-stage dipping filter membrane 35 is arranged on the inner side of the second connecting ring 34, a second sealing ring 36 is arranged at the upper end of the second-stage dipping filter membrane 35 and positioned on the upper side of the second connecting ring 34, a sampling iodine box 37 is arranged at the lower end of the second connecting ring 34, a third-stage activated carbon box 38 is arranged on the inner side of the sampling iodine box 37, activated carbon particles are filled in the third-stage activated carbon box 38, and a third sealing ring 39 is arranged at the upper end of the third-stage activated carbon box 38 and positioned on the upper side of the sampling iodine box 37.

Preferably: the primary filter membrane 32 and the secondary impregnated filter membrane 35 are both annular, and the outer diameter of the primary filter membrane 32, the outer diameter of the secondary impregnated filter membrane 35 and the outer diameter of the sampling iodine box 37 are all 90mm, so that the suction gas is collected and filtered by the activated carbon particles in the primary filter membrane 32, the secondary impregnated filter membrane 35 and the tertiary activated carbon box 38 in sequence from the upper side; the first sealing ring 33, the second sealing ring 36 and the third sealing ring 39 are all O-shaped sealing rings, and the connecting pieces are sealed through the first sealing ring 33, the second sealing ring 36 and the third sealing ring 39; the first connecting ring 31 is in threaded connection with the rain cover 1, the second connecting ring 34 is in threaded connection with the first connecting ring 31, and the sampling iodine box 37 is in threaded connection with the second connecting ring 34, so that connection and disassembly between adjacent parts are facilitated, and the use convenience is improved; connecting rod 4 and sampling iodine box 37 threaded connection and guarantee the gas tightness through an O type sealing washer, 4 lower extreme threaded connection sampling pumps of connecting rod make connecting rod 4 and sampling iodine box 37 firm in connection, through adopting the pump with gaseous downside suction, make gaseous from the top down remove.

The utility model discloses theory of operation and use flow: atmospheric airflow enters the inner side of the acquisition mechanism 3 from the filter screen 2 on the lower side of the rain cover 1, firstly, the particle-bound iodine in the air is collected and acquired through the primary filter membrane 32, then, the inorganic gaseous iodine-129 is collected through the secondary impregnation filter membrane 35, and finally, the organic gaseous iodine-129 is collected through the three-stage activated carbon box 38, so that the acquisition and monitoring of the atmospheric particle-bound iodine-129, the inorganic gaseous iodine-129 and the organic gaseous iodine-129 are realized.

The foregoing illustrates and describes the general principles, features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only illustrative of the principles of the present invention, and that various changes and modifications may be made without departing from the spirit and scope of the present invention, and all such changes and modifications fall within the scope of the present invention as claimed.

Claims

1. The utility model provides a collection system of atmospheric particulate state and gaseous state iodine-129 which characterized in that: the device comprises a rain cover (1), wherein a filter screen (2) is arranged at the lower end of the rain cover (1), an acquisition mechanism (3) for collecting iodine-129 in gas is arranged at the lower end of the rain cover (1) and positioned below the filter screen (2), and a connecting rod (4) is arranged at the lower end of the acquisition mechanism (3); gather mechanism (3) including first go-between (31), first go-between (31) inboard is provided with one-level filter membrane (32), one-level filter membrane (32) upper end is located first go-between (31) upside is provided with first sealing washer (33), first go-between (31) lower extreme is connected with second go-between (34), second go-between (34) inboard is provided with second grade flooding filter membrane (35), second grade flooding filter membrane (35) upper end is located second go-between (34) upside is provided with second sealing washer (36), second go-between (34) lower extreme is provided with sampling iodine box (37), sampling iodine box (37) inboard is provided with tertiary activated carbon box (38), the inside active carbon granule that loads of tertiary activated carbon box (38), tertiary activated carbon box (38) upper end is located sampling iodine box (37) upside is provided with third sealing washer (39).

2. The apparatus of claim 1, wherein the atmospheric particulate and gaseous iodine-129 collection apparatus comprises: the primary filter membrane (32) and the secondary dipping filter membrane (35) are both annular, and the outer diameter of the primary filter membrane (32), the outer diameter of the secondary dipping filter membrane (35) and the outer diameter of the sampling iodine box (37) are all consistent and 90mm.

3. The apparatus of claim 1, wherein the atmospheric particulate and gaseous iodine-129 collection apparatus comprises: the first sealing ring (33), the second sealing ring (36) and the third sealing ring (39) are all O-shaped sealing rings.

4. The apparatus of claim 1, wherein the atmospheric particulate and gaseous iodine-129 collection apparatus comprises: the first connecting ring (31) is in threaded connection with the rain cover (1), the second connecting ring (34) is in threaded connection with the first connecting ring (31), and the sampling iodine box (37) is in threaded connection with the second connecting ring (34).

5. The apparatus of claim 1, wherein the atmospheric particulate and gaseous iodine-129 collection apparatus comprises: connecting rod (4) with sampling iodine box (37) threaded connection guarantees the gas tightness through an O type sealing washer, connecting rod (4) lower extreme threaded connection sampling pump.