A C-14 sampler
By combining multi-stage sampling bottles and catalysts, the problem of sodium hydroxide solution's inability to absorb C-14 in carbon monoxide and methane was solved, achieving complete absorption of C-14 and improving the accuracy and reliability of the detection results.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- WEIFANG EME AUTOMATION TECH CO LTD
- Filing Date
- 2025-06-30
- Publication Date
- 2026-06-05
AI Technical Summary
In existing technologies, sodium hydroxide solution cannot effectively absorb carbon monoxide in the air and C-14 in methane, resulting in inaccurate detection results.
The system employs a combination of multi-stage sampling bottles and catalysts. Carbon dioxide is initially absorbed through the first and second sampling bottles. Unabsorbed gas enters the catalyst to undergo a catalytic reaction that converts carbon monoxide and methane into carbon dioxide. The gas is then absorbed by the third and fourth sampling bottles. Combined with a cooling unit and catalyst cooling device, this ensures that the gas is completely absorbed.
It achieves complete absorption of C-14 in the air, improving the accuracy and reliability of the detection results and reducing sampling errors.
Smart Images
Figure CN224327965U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of radioactive material sampling equipment, specifically to a C-14 sampler. Background Technology
[0002] C-14 in the air can exist in many chemical forms, the most common of which is 14CO2.
[0003] Currently, the sampling method for C-14 is generally the bubbling method, which involves passing air into a sodium hydroxide solution to capture carbon dioxide, thereby collecting C-14.
[0004] For example, in the prior art, there is a patent application document with publication number CN115200950A and patent name: a high-precision carbon-tritium sampler. In this document, carbon and tritium elements in the gas are sampled by allowing the gas at the inlet end to pass through multiple sampling bottles containing sodium hydroxide solution in sequence.
[0005] C-14 exists not only in carbon dioxide, but also in gases such as carbon monoxide and methane. Sodium hydroxide solution cannot absorb carbon monoxide and methane. Therefore, if the above-mentioned patent is used to capture C-14 directly, the concentration of C-14 will still be too low, and the detection results will not be accurate enough. Utility Model Content
[0006] To overcome the above-mentioned defects, the purpose of this utility model is to provide a C-14 sampler that can improve the absorption effect of C-14, reduce errors, and further ensure the accuracy of the detection results.
[0007] To achieve the above objectives, this utility model provides a C-14 sampler, characterized in that it includes a sampling box and an air inlet sampling head, wherein the sampling box is provided with a catalyst and several sampling bottles, the sampling bottles are used to hold gas collecting liquid, and a bubbler is installed in the sampling bottles;
[0008] The sampling bottles include a first sampling bottle, a second sampling bottle, a third sampling bottle, and a fourth sampling bottle arranged side by side;
[0009] The inlet of the first sampling bottle is connected to the inlet sampling head, and the outlet of the first sampling bottle is connected to the inlet of the second sampling bottle; the outlet of the second sampling bottle is connected to the inlet of the catalyst, the outlet of the catalyst is connected to the inlet of the third sampling bottle, the outlet of the third sampling bottle is connected to the inlet of the fourth sampling bottle, and the outlet of the fourth sampling bottle is connected to a power air pump.
[0010] Preferably, a gas flow meter is also provided on the air inlet pipe between the air inlet sampling head and the first sampling bottle.
[0011] Preferably, the sampling box is further provided with a sampling bottle cooling device, which includes a first cooling unit and a second cooling unit;
[0012] The first cooling unit includes a first circulating pump, a first cooling pipe, and refrigerant inside the first cooling pipe. The two ends of the first cooling pipe are respectively connected to the inlet and outlet of the first circulating pump. The first cooling pipe includes U-shaped sections located inside the first sampling bottle and the second sampling bottle, respectively. The U-shaped sections are both immersed in the gas collecting liquid. A first heat-conducting block is provided on the outlet section of the first circulating pump, and a first cooling fan is installed on the first heat-conducting block.
[0013] The second cooling unit includes a second circulating pump, a second cooling pipe, and refrigerant inside the second cooling pipe. The two ends of the second cooling pipe are connected to the inlet and outlet of the second circulating pump, respectively. The second cooling pipe includes U-shaped sections located inside the third sampling bottle and the fourth sampling bottle, respectively. The U-shaped sections are both immersed in the gas collecting liquid. A second heat-conducting block is provided on the outlet section of the second circulating pump, and a second cooling fan is installed on the second heat-conducting block.
[0014] Preferably, the sampling box is further provided with a catalyst cooling device, which includes a finned heat sink and a cooling fan. The finned heat sink is disposed in the air outlet pipe of the catalyst, and the air outlet of the cooling fan faces the finned heat sink.
[0015] Preferably, each of the sampling bottles is equipped with a temperature probe.
[0016] Preferably, a buffer tank is also connected to the air inlet pipe of the first sampling bottle and the third sampling bottle.
[0017] Preferably, the sampling box is equipped with an air conditioning unit, and the air conditioning unit is provided with a plurality of exhaust holes.
[0018] The beneficial technical effects achieved by this utility model after adopting the above technical solution are as follows:
[0019] 1. Because a first sampling bottle, a second sampling bottle, a third sampling bottle, a fourth sampling bottle, and a catalyst are set up, under the action of a power air pump, the carbon dioxide in the air to be sampled is initially absorbed by the first and second sampling bottles. The unabsorbed gas enters the catalyst, and after the catalytic reaction in the catalyst, carbon monoxide, methane, and other gases in the gas are catalyzed into carbon dioxide. The catalytically converted gas is then absorbed and processed by the third and fourth sampling bottles. In the above sampling process, C-14 attached to carbon dioxide, carbon monoxide, and methane can be completely absorbed, thus ensuring the accuracy and authenticity of the sampling and better reflecting the test results.
[0020] 2. Because of the first and second cooling units, the refrigerant in the cooling pipe can quickly remove heat, thereby reducing the loss of gas collecting liquid in the sampling bottle caused by high-temperature vaporization, thus avoiding frequent replenishment of gas collecting liquid and reducing sampling error. Attached Figure Description
[0021] Figure 1 This is a schematic diagram showing the usage state of this utility model;
[0022] Figure 2 This is a schematic diagram of the internal structure of this utility model;
[0023] Figure 3 yes Figure 2 The front view;
[0024] Figure 4 This is a reference schematic diagram of the first cooling unit and the circulation pipeline in this utility model;
[0025] In the diagram,
[0026] 1. Sampling box; 11. Air inlet sampling head; 12. Buffer tank; 13. Bubble blower; 14. Gas flow meter; 15. Power air pump; 16. Temperature probe; 17. Air conditioning unit;
[0027] 2. Sampling bottle; 21. First sampling bottle; 22. Second sampling bottle; 23. Third sampling bottle; 24. Fourth sampling bottle;
[0028] 31. First cooling unit; 311. First circulating pump; 312. First cooling pipe; 313. First heat-conducting block; 314. First cooling fan; 32. Second cooling unit; 321. Second circulating pump; 322. Second cooling pipe; 323. Second cooling fan;
[0029] 4. Catalyst; 41. Finned heat sink; 42. Cooling fan;
[0030] 5. Air inlet; 6. Air outlet. Detailed Implementation
[0031] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely for explaining the present utility model and are not intended to limit the present utility model.
[0032] See Figures 1-4This utility model provides a C-14 sampler, including a sampling box 1 and an air inlet sampling head 11. The sampling box 1 is equipped with a catalyst 4 and several sampling bottles 2. The sampling bottles 2 are used to hold gas collecting liquid and are equipped with a bubbler 13. The sampling bottles 2 include a first sampling bottle 21, a second sampling bottle 22, a third sampling bottle 23 and a fourth sampling bottle 24 arranged side by side. The air inlet end of the first sampling bottle 21 is connected to the air inlet sampling head 11, and the air outlet end of the first sampling bottle 21 is connected to the air inlet end of the second sampling bottle 22. The air outlet end of the second sampling bottle 22 is connected to the air inlet end of the catalyst 4, the air outlet end of the catalyst 4 is connected to the air inlet end of the third sampling bottle 23, the air outlet end of the third sampling bottle 23 is connected to the air inlet end of the fourth sampling bottle 24, and the air outlet end of the fourth sampling bottle 24 is connected to a power air pump 15. The air intake sampling head 11 is generally upside down, that is, from bottom to top, air enters into the air intake port 5 through the gap on the side of the air intake sampling head 11. In this way, when this utility model is used as an outdoor sampling device, it can achieve the functions of waterproof and dustproof.
[0033] Sampling bottle 2 is a current technology, utilizing the property of sodium hydroxide solution to absorb carbon dioxide. Generally, sampling bottle 2 contains a certain concentration of sodium hydroxide solution. Several pipes are installed between the first sampling bottle 21, the second sampling bottle 22, the third sampling bottle 23, and the fourth sampling bottle 24, and all pipes should be sealed. All power is supplied by the power pump 15. Under the action of the power pump 15, the air to be sampled enters the first sampling bottle 21 and the second sampling bottle 22 sequentially through the air inlet of the air inlet sampling head 11. Using a bubbling method, the gas comes into contact with the sodium hydroxide solution, and the carbon dioxide is absorbed. The gas exiting from the second sampling bottle 22 does not contain carbon dioxide and enters the catalyst 4. After catalytic conversion, the carbon monoxide, methane, and other gases in it are catalytically converted into carbon dioxide. The catalytically converted gas enters the third sampling bottle 23 and the fourth sampling bottle 24. After absorbing all the carbon dioxide, the gas passes through the power pump 15 and is discharged from the outlet 6.
[0034] Catalyst 4 is existing technology and is widely used in automotive exhaust treatment; it can be purchased directly as needed. The gas after catalytic conversion enters the third sampling bottle 23 and the fourth sampling bottle 24, where the carbon dioxide is absorbed again, thus collecting all incoming carbon dioxide gas and enabling C-14 sampling and detection.
[0035] A gas flow meter 14 is also connected to the air inlet pipe between the air inlet sampling head 11 and the first sampling bottle 21 of this utility model. The gas flow meter 14 is used to detect and control the amount of gas entering, which is existing technology, and the required model can be purchased directly.
[0036] The sampling box 1 is also equipped with a sampling bottle 2 cooling device, which includes a first cooling unit 31 and a second cooling unit 32. The first cooling unit 31 includes a first circulating pump 311, a first cooling pipe 312 and a refrigerant in the first cooling pipe 312. The two ends of the first cooling pipe 312 are respectively connected to the liquid inlet and liquid return port of the first circulating pump 311. The first cooling pipe 312 includes U-shaped parts located in the first sampling bottle 21 and the second sampling bottle 22 respectively. The U-shaped parts are both immersed in the gas collecting liquid. A first heat-conducting block 313 is provided on the liquid return pipe section of the first circulating pump 311, and a first cooling fan 314 is installed on the first heat-conducting block 313.
[0037] The second cooling unit 32 includes a second circulating pump 321, a second cooling pipe 322, and a refrigerant in the second cooling pipe 322. The two ends of the second cooling pipe 322 are connected to the inlet and outlet of the second circulating pump 321, respectively. The second cooling pipe 322 includes U-shaped sections located in the third sampling bottle 23 and the fourth sampling bottle 24, respectively. The U-shaped sections are both immersed in the gas collecting liquid. A second heat-conducting block is provided on the outlet section of the second circulating pump 321, and a second cooling fan 323 is installed on the second heat-conducting block.
[0038] See Figure 4 The first cooling unit 31 and the second cooling unit 32 have the same structure and principle, the only difference being the sampling bottle 2 used for cooling. Taking the first cooling unit 31 as an example, the first circulation pump 311 drives the coolant in the first cooling pipe 312 to circulate. The U-shaped part of the first cooling pipe 312 is located below the liquid surface of the gas collecting liquid. During the carbon dioxide absorption reaction, the temperature of the gas collecting liquid rises, and its heat is carried away by the coolant in the first cooling pipe 312. When the coolant passes through the first heat-conducting block 313, its heat is transferred to the first heat-conducting block 313. The first heat-conducting block 313 is generally made of metal, commonly copper, and is usually paired with thermal grease to enhance thermal conductivity. A first cooling fan 314 is installed on the first heat-conducting block 313. A finned cavity is provided on one side of the first heat-conducting block 313. When air flows through the first heat-conducting block 313, it can carry away a large amount of heat. The connection between the first cooling pipe 312 and the first heat-conducting block 313 and the principle of using air cooling are known existing technologies.
[0039] The sampling box 1 of this invention is further equipped with a catalyst cooling device, which includes a finned heat sink 41 and a cooling fan 42. The finned heat sink 41 is located in the air outlet duct of the catalyst 4, and the air outlet of the cooling fan 42 faces the finned heat sink 41. The cooling fan 42 rapidly cools the finned heat sink 41, thereby lowering the temperature of the air entering the third sampling bottle 23 and extending the lifespan of the organic material tubing.
[0040] The sampling box 1 of this invention is also equipped with a catalyst cooling device, which includes a finned heat sink 41. The finned heat sink 41 is disposed in the air outlet pipe of the catalyst 4. The sampling box 1 is also equipped with a cooling fan 42 with its air outlet facing the finned heat sink 41. The first cooling pipe 312 of the first cooling unit 31 generally contains Freon and is connected to the first sampling bottle 21 and the second sampling bottle 22 respectively. Then, the first cooling pipe 312 is attached to the first heat-conducting block 313, and the first cooling fan 314 drives the gas flow to achieve rapid cooling of the first heat-conducting block 313. The coolant in the cooling pipe is existing technology and can be recycled. The cooling method and cooling principle of the second cooling unit 32 are the same as those of the first cooling unit 31, and will not be described again. Since the temperature of the catalyst 4 is extremely high, the air coming out is cooled after passing through the finned heat sink 41 and the cooling fan 42 before entering the third sampling bottle 23, which can prevent excessive loss of the sampled liquid.
[0041] Each sampling bottle 2 of this invention is equipped with a temperature probe 16. The temperature probe 16 is used to detect and report the temperature inside the sampling bottle 2 in a timely manner. Generally, it is determined by calculating the average temperature of the first sampling bottle 21 and the second sampling bottle 22. When the average temperature is significantly higher than the set value, the first cooling unit 31 is activated to quickly cool down and dissipate heat. When the average temperature of the temperature probe 16 is lower than the set value, the first cooling unit 31 and the second cooling unit 32 are turned off to ensure that the solution inside the sampling bottle maintains the set temperature. This part can be controlled by setting an automatic control system to control the automatic start and stop function of the equipment.
[0042] The first sampling bottle 21 and the third sampling bottle 23 of this invention are also connected to a buffer tank 12. The buffer tank 12 is used for buffering, especially when the gas just enters the sampling bottle 2, there will be obvious vibration. The buffer tank 12 is used to ensure the safety of the equipment connection.
[0043] The sampling box 1 of this invention is equipped with an air conditioning unit 17, which has several exhaust vents. If an additional air conditioning unit 17 is needed on the sampling box 1, excess heat can be dissipated through the exhaust vents, ensuring the normal operation of the sampling equipment. The air conditioning unit 17 can also provide cooling; in some low-temperature environments, it can preheat the air to ensure successful sampling.
[0044] Of course, there may be other embodiments of this utility model. Without departing from the spirit and essence of this utility model, those skilled in the art can make various corresponding changes and modifications based on this utility model, but these corresponding changes and modifications should all fall within the protection scope of the appended claims of this utility model.
Claims
1. A C-14 sampler, characterized in that, It includes a sampling box and an air intake sampling head. The sampling box is equipped with a catalyst and several sampling bottles. The sampling bottles are used to hold gas collecting liquid and are equipped with bubblers. The sampling bottles include a first sampling bottle, a second sampling bottle, a third sampling bottle, and a fourth sampling bottle arranged side by side; The inlet of the first sampling bottle is connected to the inlet sampling head, and the outlet of the first sampling bottle is connected to the inlet of the second sampling bottle; the outlet of the second sampling bottle is connected to the inlet of the catalyst, the outlet of the catalyst is connected to the inlet of the third sampling bottle, the outlet of the third sampling bottle is connected to the inlet of the fourth sampling bottle, and the outlet of the fourth sampling bottle is connected to a power air pump.
2. The C-14 sampler according to claim 1, characterized in that, A gas flow meter is also installed on the air inlet pipe between the air inlet sampling head and the first sampling bottle.
3. The C-14 sampler according to claim 1, characterized in that, The sampling box is also equipped with a sampling bottle cooling device, which includes a first cooling unit and a second cooling unit. The first cooling unit includes a first circulating pump, a first cooling pipe, and refrigerant inside the first cooling pipe. The two ends of the first cooling pipe are respectively connected to the inlet and outlet of the first circulating pump. The first cooling pipe includes U-shaped sections located inside the first sampling bottle and the second sampling bottle, respectively. The U-shaped sections are both immersed in the gas collecting liquid. A first heat-conducting block is provided on the outlet section of the first circulating pump, and a first cooling fan is installed on the first heat-conducting block. The second cooling unit includes a second circulating pump, a second cooling pipe, and refrigerant inside the second cooling pipe. The two ends of the second cooling pipe are connected to the inlet and outlet of the second circulating pump, respectively. The second cooling pipe includes U-shaped sections located inside the second sampling bottle and the second sampling bottle, respectively. The U-shaped sections are both immersed in the gas collecting liquid. A second heat-conducting block is provided on the outlet section of the second circulating pump, and a second cooling fan is installed on the second heat-conducting block.
4. The C-14 sampler according to claim 3, characterized in that, The sampling box is also equipped with a catalyst cooling device, which includes a finned heat sink and a cooling fan. The finned heat sink is located in the air outlet pipe of the catalyst, and the air outlet of the cooling fan faces the finned heat sink.
5. The C-14 sampler according to claim 1, characterized in that, Each of the sampling bottles is equipped with a temperature probe.
6. The C-14 sampler according to claim 1, characterized in that, The first sampling bottle and the third sampling bottle are also connected to a buffer tank on their air inlet pipes.
7. The C-14 sampler according to claim 1, characterized in that, The sampling box is equipped with an air conditioning unit, which has several exhaust vents.