CN220495974U - Small-size integrated negative pressure type iodine adsorption purification device - Google Patents
Small-size integrated negative pressure type iodine adsorption purification device Download PDFInfo
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- CN220495974U CN220495974U CN202321990892.5U CN202321990892U CN220495974U CN 220495974 U CN220495974 U CN 220495974U CN 202321990892 U CN202321990892 U CN 202321990892U CN 220495974 U CN220495974 U CN 220495974U
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- 238000000746 purification Methods 0.000 title claims abstract description 57
- 238000001179 sorption measurement Methods 0.000 title claims abstract description 35
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 title claims abstract description 24
- 229910052740 iodine Inorganic materials 0.000 title claims abstract description 24
- 239000011630 iodine Substances 0.000 title claims abstract description 24
- 239000012629 purifying agent Substances 0.000 claims abstract description 20
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 9
- 238000009423 ventilation Methods 0.000 claims description 9
- 239000002696 acid base indicator Substances 0.000 claims description 6
- 230000002285 radioactive effect Effects 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 5
- 230000008569 process Effects 0.000 abstract description 4
- 230000004913 activation Effects 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 42
- 238000007689 inspection Methods 0.000 description 12
- 239000003463 adsorbent Substances 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000000446 fuel Substances 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000005273 aeration Methods 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 230000004992 fission Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000003758 nuclear fuel Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
- 229910052724 xenon Inorganic materials 0.000 description 1
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 1
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- Treating Waste Gases (AREA)
Abstract
The utility model discloses a small-sized integrated negative pressure type iodine adsorption purification device, which comprises a gas collection tank, a gas pump, a gas flow dredging pipe and a purification tank which are connected in sequence; the inside of the gas collection tank is in a negative pressure state relative to the atmosphere and is used for being connected with the exhaust port of the sipping device; the air pump is used for generating adsorption force to suck the air in the air collection tank into the air flow dredging pipe and the purifying tank; the diameter of the airflow dredging pipe is gradually increased along the airflow direction; the purifying tank is internally provided with a purifying agent for adsorbing radionuclides in exhaust gas discharged by upstream equipment. The utility model generates negative pressure adsorption through the gas collecting tank and the air pump which are integrated inside, realizes the gas collection of the exhaust end of the on-line sipping device on the premise of ensuring the normal operation of the sipping device, processes the gas through the purification tank at the rear end and discharges the gas to the environment atmosphere, thereby reducing the risk of releasing radioactive activation products to the environment.
Description
Technical Field
The utility model relates to the technical field of radioactive gas purification, in particular to a small-sized integrated negative pressure type iodine adsorption purification device.
Background
When a nuclear fuel assembly of a nuclear power plant is shut down and overhauled, on-line sipping inspection is usually required to be carried out so as to determine whether the damaged fuel assembly exists or not and ensure the follow-up safe operation of the nuclear power plant; however, in the sipping inspection process, the fission activated gas of each fuel assembly needs to be sipped, extracted and inspected, and then discharged into a discharge hall after the inspection is finished, which has a great potential safety hazard for on-site discharge operators, and although the sipping inspection device itself has an alarm function, when the broken assembly is inspected and the alarm is started, the fission activated gas of the on-site fuel assembly may have been released to the surrounding environment for a period of time, and for on-site operators, certain radiation protection risks exist, and internal irradiation pollution is easy to cause.
The sip-suction inspection device in use at present is limited by the function of the device and the principle structure of the device, the sip-suction inspection device needs to be connected with the outside environment at an exhaust port to ensure the normal operation of an internal pipeline loop, if a filter tank is directly added at the exhaust port, positive pressure resistance of an exhaust pipeline is caused, so that the function of the sip-suction device is possibly unavailable, and therefore, an absorption tank device cannot be directly added at the exhaust port.
In view of this, the present application is specifically proposed.
Disclosure of Invention
The technical problem to be solved by the utility model is that the sipping inspection device cannot directly add an absorption tank device at an exhaust port, and the utility model aims to provide a small-sized integrated negative pressure type iodine adsorption purification device, wherein negative pressure adsorption is generated through an internally integrated gas collection tank and an air pump, so that on the premise of ensuring the normal operation of the sipping device, the gas collection at the exhaust end of the on-line sipping device is realized, and the gas is treated by a purification tank at the rear end and then is discharged into the environment atmosphere, thereby reducing the risk of releasing radioactive activation products to the environment.
The utility model is realized by the following technical scheme:
a small-sized integrated negative pressure type iodine adsorption purification device comprises a gas collection tank, an air pump, an air flow dredging pipe and a purification tank which are connected in sequence; the inside of the gas collection tank is in a negative pressure state relative to the atmosphere and is used for being connected with the exhaust port of the sipping device; the air pump is used for generating adsorption force to suck the air in the air collection tank into the air flow dredging pipe and the purifying tank; the diameter of the airflow dredging pipe is gradually increased along the airflow direction; the purifying tank is internally provided with a purifying agent for adsorbing radionuclides in exhaust gas discharged by upstream equipment.
According to the purifying device, through the arrangement of the gas collection tank and the air pump, negative pressure is formed in the gas collection tank, and the gas is collected in a negative pressure protection mode, so that the influence on the working state of an upstream gas loop can be avoided; the air flow enters the purification tank through the air flow dredging pipe, the air flow dredging pipe plays roles of dredging and guiding the air flow, so that the air flow is stable and uniform, and the air flow can be uniformly dispersed and fully contacted with the adsorbent in the purification tank due to the fact that the pipe diameter of an air pipeline at the outer upper stream of the purification device is small and the flow is limited; the purifying tank can purify and adsorb radionuclides such as Xe-133, I-131 and the like in waste gas discharged by upstream equipment, so that the condition that a large amount of radioactive activated products are discharged is avoided, and safety guarantee is provided for operators on sip-suction inspection sites.
A flowmeter is arranged between the gas collection tank and the air pump, and the gas flow value can be adjusted through the flowmeter.
A three-way valve is arranged between the air pump and the air flow dredging pipe, a third tee joint of the three-way valve is connected with a bypass pipeline, the three-way valve is used for controlling an exhaust pipeline to branch, when the air pump and the air flow dredging pipe are communicated through the three-way valve during normal operation, the air pump and the air flow dredging pipe are discharged to the outside of the device after passing through the purification tank, when the purifying agent in the purification tank 7 is saturated, the air pump is switched to the bypass pipeline, and after the purifying agent in the purification tank is replaced, the air pump and the air flow dredging pipe are switched to a working pipeline.
Specifically, the airflow dredging pipe comprises a pipe shell, wherein the pipe shell is of a hollow round table-shaped structure with a small front end and a large rear end, an air inlet joint I is arranged at the front end of the pipe shell, an air outlet joint I is arranged at the rear end of the pipe shell, and a dredging pipe is arranged in the pipe shell; the front end face and the rear end face of the dredging pipe are respectively provided with an air flow hole, and the air flow holes at the two ends are connected through an arc-shaped air flow tunnel inside the dredging pipe; the air flow flows in from the air inlet end, is uniformly guided and split into a plurality of strands to the air outlet end by the air flow tunnel of the guiding pipe, and flows into the purifying tank.
The purifying tank comprises a purifying tank shell, wherein an air inlet joint II is arranged at the front end of the purifying tank shell, an air outlet joint II is arranged at the rear end of the purifying tank shell, purifying agents are arranged in the purifying tank shell, ventilation plates are arranged at the two ends of the purifying agents, and ventilation plate slits are uniformly distributed on the ventilation plates; the purifying agent is in the form of solid small particles, gaps among the purifying agent and the purifying agent can enable gas to uniformly pass through, and long and thin slits which are uniformly distributed are reserved on the ventilation plate, so that the flowing speed of gas flow in the purifying tank is slowed down, the residence time of the gas flow in the purifying agent is prolonged, and the gas entering and exiting can be fully contacted with the purifying agent.
The back end of the purifying agent is provided with an acid-base indicator, the acid-base indicator has an adsorption effect on the I-131, and changes color along with the increase of the adsorption quantity, and when the indicator changes color, the purifying agent in the purifying tank of the field personnel can be reminded of being close to saturation and should be replaced in time.
And when the negative pressure value in the gas collection tank exceeds the limit, the safety valve is opened to be communicated with the external atmosphere environment, so that the negative pressure in the gas collection tank is ensured to be maintained in a stable range, and the negative pressure stability of an upstream pipeline outside the device is ensured.
The purification device adopts an integrated structure, adopts a panel type installation mode for manually operated component flow regulating components, a three-way valve change-over switch, an air pump starting power supply and the like, is convenient for regulating flow and checking the working state of the device in the field use process, is convenient to carry and carry, and is suitable for being used in the nuclear power field unloading inspection.
Compared with the prior art, the utility model has the following advantages and beneficial effects:
1. the small integrated negative pressure type iodine adsorption purification device provided by the embodiment of the utility model generates negative pressure adsorption through the gas collection tank and the gas pump which are integrated in the interior, and is used in combination with the on-line sipping inspection device, so that the gas at the exhaust end of the sipping device can be collected and purified on the premise of ensuring the normal operation of the sipping device, and the risk of releasing radioactive activated products to the environment is reduced;
2. the small-sized integrated negative pressure type iodine adsorption purification device provided by the embodiment of the utility model fully considers the working characteristics of the sip checking device, generates negative pressure slightly lower than the environment at one end connected with the exhaust port of the sip checking device, avoids influencing the function of the sip checking device, removes and reduces the concentration level of radioactive iodine/xenon and the like in exhaust gas by means of an internal purification loop, and protects site unloading personnel;
3. the small-sized integrated negative pressure type iodine adsorption purification device provided by the embodiment of the utility model adopts an integrated structure, is convenient to carry and is suitable for being used in nuclear power site unloading inspection;
4. the small-sized integrated negative pressure type iodine adsorption purification device provided by the embodiment of the utility model greatly improves the safety in the sip-up inspection process, reduces the risk of personnel irradiated by the activated product, and improves the nuclear safety level of a nuclear power plant.
Drawings
In order to more clearly illustrate the technical solutions of the exemplary embodiments of the present utility model, the drawings that are needed in the examples will be briefly described below, it being understood that the following drawings only illustrate some examples of the present utility model and therefore should not be considered as limiting the scope, and that other related drawings may be obtained from these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a mechanical connection diagram of a purification device according to an embodiment of the present utility model;
FIG. 2 is a schematic diagram of an airflow evacuation duct according to an embodiment of the present utility model;
FIG. 3 is a schematic diagram of a purification tank according to an embodiment of the present utility model;
fig. 4 is an integrated structure diagram of a purification device according to an embodiment of the present utility model.
In the drawings, the reference numerals and corresponding part names:
1-gas collection tank, 2-flowmeter, 3-relief valve, 4-air pump, 5-three-way valve, 6-air flow dredging pipe, 7-purification tank, 8-air inlet joint I, 9-pipe shell, 10-air outlet joint I, 11-dredging pipe, 12-purification tank shell, 13-purifying agent, 14-air inlet joint II, 15-aeration plate, 16-acid-base indicator, 17-air outlet joint II, 18-aeration plate slit.
Detailed Description
For the purpose of making apparent the objects, technical solutions and advantages of the present utility model, the present utility model will be further described in detail with reference to the following examples and the accompanying drawings, wherein the exemplary embodiments of the present utility model and the descriptions thereof are for illustrating the present utility model only and are not to be construed as limiting the present utility model.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. However, it will be apparent to one of ordinary skill in the art that: no such specific details are necessary to practice the utility model. In other instances, well-known structures, circuits, materials, or methods have not been described in detail in order not to obscure the utility model.
Throughout the specification, references to "one embodiment," "an embodiment," "one example," or "an example" mean: a particular feature, structure, or characteristic described in connection with the embodiment or example is included within at least one embodiment of the utility model. Thus, the appearances of the phrases "in one embodiment," "in an example," or "in an example" in various places throughout this specification are not necessarily all referring to the same embodiment or example. Furthermore, the particular features, structures, or characteristics may be combined in any suitable combination and/or sub-combination in one or more embodiments or examples. Moreover, those of ordinary skill in the art will appreciate that the illustrations provided herein are for illustrative purposes and that the illustrations are not necessarily drawn to scale. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
In the description of the present utility model, the terms "front", "rear", "left", "right", "upper", "lower", "vertical", "horizontal", "high", "low", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, merely to facilitate description of the present utility model and simplify description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the scope of the present utility model.
Example 1
The embodiment of the utility model provides a small integrated negative pressure type iodine adsorption purification device, the mechanical connection structure of which is shown in figure 1, and the device comprises a gas collection tank 1, a flowmeter 2, a gas pump 4, a three-way valve 5, a gas flow dredging pipe 6 and a purification tank 7 which are sequentially connected, wherein the integrated structure of the device is shown in figure 4; the inside of the gas collection tank 1 is in a negative pressure state relative to the atmosphere and is used for being connected with the exhaust port of the sipping device; the downstream of the gas collection tank is connected to the flowmeter 2 and then connected to the gas pump 4, the current gas flow value can be adjusted through the flowmeter 2, and the gas pump 4 generates adsorption force to collect gas from an upstream pipeline outside the device and suck the gas into the gas flow dredging pipe 6 and the purification tank 7; the 3-way valve 5 at the downstream of the air pump 4 is used for controlling the branch of an exhaust pipeline, and in normal operation, the air pump 4 is connected with the gas evacuation pipe 6, and is discharged to the outside of the device after passing through the purification tank 7, and the purification tank 7 is internally provided with a purifying agent 13 for adsorbing radionuclides in exhaust gas discharged by upstream equipment.
When the adsorbent in the purification tank 7 is saturated, the three-way valve is switched to a bypass mode, the purification tank is taken down, the adsorbent in the purification tank 7 is replaced, the working state is restored, the operation is simple, the use is convenient, and the site requirement is met.
Preferably, the gas collection tank is connected with the safety valve 3, and when the negative pressure value exceeds the limit, the safety valve is opened to communicate with the external atmosphere environment, so that the negative pressure is ensured to be maintained in a stable range.
Example 2
As shown in fig. 2, the embodiment of the utility model provides a small-sized integrated negative pressure type iodine adsorption purification device, and based on embodiment 1, the specific structure of the airflow dredging pipe 6 is as follows: the pipe comprises a pipe shell 9, wherein the pipe shell 9 is of a hollow round table-shaped structure with a small front end and a large rear end, an air inlet joint I8 is arranged at the front end of the pipe shell, an air outlet joint I10 is arranged at the rear end of the pipe shell, and a dredging pipe 11 is arranged in the pipe shell.
The airflow dredging pipe 6 has the functions of dredging and guiding airflow, ensuring the stability and uniformity of the airflow, considering that the pipe diameter of an air pipeline loop at the upstream outside of the device is thinner, the flow is limited, in order to improve the adsorption and purification effect of a purification tank inside the device, the pipe diameter area of the airflow is increased and dispersed uniformly through the airflow dredging pipe 6, as shown in fig. 2, the lateral section of a dredging pipe structure 11 inside the airflow dredging pipe 6 is trapezoid, the end face of an air inlet joint 8 is small, the end face of an air outlet joint 10 is large, and the dredging pipe is arranged in a shell 9; the two end surfaces of the dredging pipe are provided with air flow holes and are connected through an arc-shaped air flow tunnel between the end surfaces, and after the air flowing in from the air inlet end is uniformly dredged to the air outlet end, the air is split into a plurality of strands and flows into a downstream purifying tank 7.
Example 3
As shown in fig. 3, the embodiment of the utility model provides a small-sized integrated negative pressure type iodine adsorption purification device, and based on embodiment 1, the specific structure of the purification tank 7 is as follows: the purifying tank 7 is of a cylindrical structure, the upper part and the lower part of the purifying tank are respectively provided with a second air inlet joint 14 and a second air outlet joint 17, and after the air outlet joint 17 is opened, the purifying agent 13, the ventilation plate 15 and the acid-base indicator 16 inside the purifying tank can be taken out. The adsorbent 13 is in the form of solid small particles, gaps among the adsorbent 13 can enable gas to uniformly pass through, and long and thin slits which are uniformly distributed are reserved on the ventilation plate 15 so as to ensure that the gas entering and exiting can fully contact the adsorbent 13; the acid-base indicator 16 has an adsorption effect on the I-131, and changes color along with the increase of adsorption quantity, and when the indicator changes color, the on-site personnel are reminded that the adsorbent 13 in the purification tank is close to saturation and should be replaced in time.
The foregoing description of the embodiments has been provided for the purpose of illustrating the general principles of the utility model, and is not meant to limit the scope of the utility model, but to limit the utility model to the particular embodiments, and any modifications, equivalents, improvements, etc. that fall within the spirit and principles of the utility model are intended to be included within the scope of the utility model.
Claims (10)
1. The small integrated negative pressure type iodine adsorption purification device is characterized by comprising a gas collection tank (1), an air pump (4), an air flow dredging pipe (6) and a purification tank (7) which are connected in sequence;
the inside of the gas collection tank (1) is in a negative pressure state relative to the atmosphere and is used for being connected with the exhaust port of the sipping device;
the air pump (4) is used for generating adsorption force to suck the air in the air collection tank (1) into the air flow dredging pipe (6) and the purifying tank (7);
the diameter of the airflow dredging pipe (6) is gradually increased along the airflow direction;
a purifying agent (13) is arranged in the purifying tank (7) and is used for adsorbing radionuclides in exhaust gas discharged by upstream equipment.
2. The small-sized integrated negative pressure type iodine adsorption purification device according to claim 1, wherein a flowmeter (2) is arranged between the gas collection tank (1) and the air pump (4).
3. The small integrated negative pressure type iodine adsorption purification device according to claim 1, wherein a three-way valve (5) is arranged between the air pump (4) and the air flow dredging pipe (6), and a third port of the three-way valve (5) is connected with a bypass pipeline.
4. The small integrated negative pressure type iodine adsorption purification device according to claim 1, wherein the air current dredging pipe (6) comprises a pipe shell (9), the pipe shell (9) is of a hollow round table structure with a small front end and a large rear end, an air inlet joint I (8) is arranged at the front end of the pipe shell (9), an air outlet joint I (10) is arranged at the rear end of the pipe shell (9), and a dredging pipe (11) is arranged in the pipe shell (9).
5. The small-sized integrated negative pressure type iodine adsorption purification device according to claim 4, wherein the front end surface and the rear end surface of the dredging pipe are provided with air flow holes, and the air flow holes at the two ends are connected through an arc-shaped air flow tunnel inside the dredging pipe.
6. The small integrated negative pressure type iodine adsorption purification device according to claim 1, wherein the purification tank (7) comprises a purification tank shell (12), an air inlet joint II (14) is arranged at the front end of the purification tank shell (12), an air outlet joint II (17) is arranged at the rear end of the purification tank shell (12), and a purifying agent (13) is arranged inside the purification tank shell (12).
7. The small-sized integrated negative pressure type iodine adsorption purification device according to claim 6, wherein the two ends of the purifying agent (13) are provided with ventilation plates (15), and ventilation plate slits (18) are uniformly distributed on the ventilation plates (15).
8. The small-sized integrated negative pressure type iodine adsorption purification device according to claim 6, wherein the rear end of the purifying agent (13) is provided with an acid-base indicator (16).
9. The small integrated negative pressure type iodine adsorption purification device according to claim 1, wherein a safety valve (3) is also installed on the gas collection tank (1).
10. The small-sized integrated negative pressure type iodine adsorption purifying apparatus according to claim 1, wherein the purifying apparatus adopts an integrated type integrated structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321990892.5U CN220495974U (en) | 2023-07-26 | 2023-07-26 | Small-size integrated negative pressure type iodine adsorption purification device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321990892.5U CN220495974U (en) | 2023-07-26 | 2023-07-26 | Small-size integrated negative pressure type iodine adsorption purification device |
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| Publication Number | Publication Date |
|---|---|
| CN220495974U true CN220495974U (en) | 2024-02-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321990892.5U Active CN220495974U (en) | 2023-07-26 | 2023-07-26 | Small-size integrated negative pressure type iodine adsorption purification device |
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| Country | Link |
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| CN (1) | CN220495974U (en) |
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2023
- 2023-07-26 CN CN202321990892.5U patent/CN220495974U/en active Active
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