Tritium and carbon sampling system

Abstract

The tritium and carbon sampling system comprises a catalytic oxidation heating device, and a gas inlet device, an absorption device and a gas extraction device which are communicated in sequence. The absorption device comprises a front-section absorption bottle and a rear-section absorption bottle communicated with the front-section absorption bottle, the front-section absorption bottle is communicated with the air inlet device, and the rear-section absorption bottle is communicated with the air extractor. The catalytic oxidation heating device is provided with a gas inlet and a gas outlet communicated with the gas inlet, the gas inlet is communicated with the front-section absorption bottle, and the gas outlet is communicated with the rear-section absorption bottle. The first temperature sensor is arranged on the gas outlet side of the catalytic oxidation heating device and used for collecting the temperature of gas on the gas outlet side of the catalytic oxidation heating device, and the control device is electrically connected with the catalytic oxidation heating device and the first temperature sensor. The heating temperature of the catalytic oxidation heating device is adjusted through the first temperature sensor and the control device, so that the heating temperature of the catalytic oxidation heating device can be accurately controlled.

Description

Technical Field

[0001] The present application relates to the technical field of radioactive monitoring of nuclear reactors, and in particular to a tritium carbon sampling system. Background Art

[0002] In nuclear power plants, a tritium-carbon sampling system is usually installed to sample tritium and carbon 14 in the gas in order to monitor the content of tritium and carbon 14 in the exhaust gas during the nuclear reaction.

[0003] The tritium carbon sampling system includes an absorption device, and the absorption liquid in the absorption device processes the exhaust gas to absorb tritium and carbon 14 in the exhaust gas. There are tritium and carbon 14 compounds in the exhaust gas that cannot be directly absorbed by the absorption liquid. In order to improve the absorption rate, the tritium carbon sampling system is also equipped with a catalytic oxidation device connected to the absorption device. The catalytic oxidation device decomposes the tritium and carbon 14 compounds in the gas that cannot be directly absorbed by the absorption liquid into tritium water and tritium water that are easily absorbed by the absorption liquid. 14 However, in the process of catalytic oxidation of exhaust gas, there is a problem that the exhaust gas cannot be completely catalytically oxidized, resulting in inaccurate tritium carbon sampling results. Summary of the invention

[0004] Based on this, it is necessary to provide a tritium-carbon sampling system to improve the accuracy and reliability of tritium and carbon 14 detection structures.

[0005] A tritium carbon sampling system, comprising:

[0006] An air inlet device, an absorption device and an air extraction device connected in sequence, wherein the absorption device comprises a front absorption bottle and a rear absorption bottle connected to the front absorption bottle, the front absorption bottle is connected to the air inlet device, and the rear absorption bottle is connected to the air extraction device;

[0007] A catalytic oxidation heating device, wherein the catalytic oxidation heating device is provided with an air inlet and an air outlet connected to the air inlet, wherein the air inlet is connected to the front-stage absorption bottle, and the air outlet is connected to the rear-stage absorption bottle;

[0008] A first temperature sensor, the first temperature sensor is arranged at the gas outlet side of the catalytic oxidation heating device, and the first temperature sensor is used to collect the temperature of the gas at the gas outlet side of the catalytic oxidation heating device; and

[0009] A control device, the control device is electrically connected to the catalytic oxidation heating device and the first temperature sensor, and the control device is used to control the heating temperature of the catalytic oxidation heating device according to the temperature of the gas on the outlet side.

[0010] In one embodiment, the catalytic oxidation heating device includes a reaction component, a preheating component and a heating component. The reaction component is provided with a reaction chamber for holding a catalyst, the preheating component is provided with a preheating chamber, the front-end absorption bottle, the preheating chamber, the reaction chamber and the rear-end absorption bottle are connected in sequence; the heating component is connected to the preheating component, and the heating component is used to heat the preheating component.

[0011] In one embodiment, the tritium carbon sampling system also includes a second temperature sensor, which is arranged corresponding to the heating component, and the second temperature sensor is used to collect the heating temperature of the heating component; the second temperature sensor is electrically connected to the control device, and the control device is used to determine whether to perform temperature adjustment according to the temperature of the heating component.

[0012] In one embodiment, the tritium carbon sampling system also includes a first flow sensor, which is arranged corresponding to the catalytic oxidation heating device, and the first flow sensor is used to detect the flow rate of the gas flowing through the catalytic oxidation heating device. The first flow sensor is electrically connected to the control device, and the control device is used to control the heating temperature of the catalytic oxidation heating device according to the flow rate of the gas.

[0013] In one embodiment, the tritium carbon sampling system also includes a cooling device, which is connected to the absorption device; the tritium carbon sampling system also includes a third temperature sensor, which is used to collect the ambient temperature of the location where the absorption device is located, and the third temperature sensor is electrically connected to the control device, and the control device is used to control the cooling device to cool the coolant and deliver the coolant to the absorption device when the ambient temperature is greater than a second preset temperature.

[0014] In one embodiment, the tritium carbon sampling system also includes a fourth temperature sensor, which is arranged on the outlet side of the cooling device, and the fourth temperature sensor is used to collect the temperature of the coolant flowing out of the cooling device; the fourth temperature sensor is electrically connected to the control device, and the control device is used to control the cooling device to adjust the cooling temperature according to the temperature of the coolant.

[0015] In one embodiment, the air intake device includes a coarse filter and at least one fine filter connected in sequence through a gas pipeline; the tritium carbon sampling system also includes a first pressure sensor and a second pressure sensor, the first pressure sensor is arranged between the coarse filter and the first fine filter along the air intake direction, and the second pressure sensor is arranged on the air outlet side of the last fine filter along the air intake direction.

[0016] In one embodiment, the tritium carbon sampling system further includes a second flow sensor, and the second flow sensor is disposed on the gas pipeline.

[0017] In one embodiment, the tritium carbon sampling system further includes an alarm, wherein the alarm is electrically connected to the control device, and the control device is used to control the alarm to operate when the reading difference between the first pressure sensor and the second pressure sensor exceeds a pressure threshold.

[0018] In one embodiment, the tritium carbon sampling system also includes a third pressure sensor, which is arranged on the air inlet side of the air extraction device; the third pressure sensor is electrically connected to the control device, and the control device is used to control the alarm to work when the pressure of the gas collected by the third pressure sensor is lower than a preset pressure.

[0019] When the above-mentioned tritium carbon sampling system is working, when the temperature of the gas at the outlet side of the catalytic oxidation heating device is lower than the first preset temperature, the control device controls the catalytic oxidation heating device to increase the heating power. In this way, the heating temperature of the catalytic oxidation heating device is adjusted by the first temperature sensor and the control device, so that the heating temperature of the catalytic oxidation heating device can be accurately controlled, and the catalytic oxidation ability of the tritium carbon sampling system to the gas is improved, ensuring that the tritium-containing and carbon-14-containing substances in the gas can be thoroughly catalytically oxidized, thereby improving the accuracy and reliability of the tritium and carbon-14 detection structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a simplified structural diagram of a tritium carbon sampling system according to an embodiment of the present application.

[0021] Figure 2 for Figure 1 The schematic diagram of the air intake device is shown.

[0022] Figure 3 for Figure 1 The schematic diagram of the absorption device and the catalytic oxidation heating device is shown.

[0023] Figure 4 for Figure 1 The schematic diagram of the refrigeration device shown.

[0024] Figure 5 for Figure 1 The structural schematic diagram of the refrigeration device shown.

[0025] Figure 6 for Figure 1 A simplified structural diagram of the air extraction device is shown.

[0026] Description of Figure Numbers:

[0027] 10. Air intake device; 11. Coarse filter; 12. First fine filter; 13. Second fine filter; 20. Absorption device; 21. Front absorption bottle; 22. Rear absorption bottle; 30. Vacuum device; 40. Catalytic oxidation heating device; 43. Heating assembly; 50. Cooling device; 51. First liquid storage tank; 52. Cooling body; 53. First cooling pipe; 54. First pump body; 55. Second liquid storage tank; 56. Heat sink; 57. Fan; 59. Second cooling pipe; 60. First temperature sensor; 61. Second temperature sensor; 62. Fourth temperature sensor; 71. Second flow sensor; 80. First pressure sensor; 81. Second pressure sensor; 82. Third pressure sensor. DETAILED DESCRIPTION

[0028] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0029] See also Figure 1 The tritium carbon sampling system provided in one embodiment of the present application comprises an intake device 10, an absorption device 20 and an exhaust device 30 which are connected in sequence. The intake device 10 is used to filter the gas to remove impurities in the gas, the absorption device 20 is used to process the filtered gas to absorb tritium and carbon 14 in the gas, and the exhaust device 30 is used to provide negative pressure for the tritium carbon sampling system so that the gas flows into the intake device 10 and the absorption device 20 in sequence. Optionally, the exhaust device 30 is an armature pump.

[0030] See also Figure 1 The absorption device 20 includes a front absorption bottle 21 and a rear absorption bottle 22 connected to the front absorption bottle 21, the front absorption bottle 21 is connected to the air intake device 10, and the rear absorption bottle 22 is connected to the air extraction device 30. The front absorption bottle 21 and the rear absorption bottle 22 are both used to contain absorption liquid to absorb tritium and carbon 14 in the gas.

[0031] See also Figure 1 The tritium carbon sampling system also includes a catalytic oxidation heating device 40, which is provided with an air inlet and an air outlet connected to the air inlet. The air inlet is connected to the front absorption bottle 21, and the air outlet is connected to the rear absorption bottle 22. When working, the gas filtered by the air inlet device 10 is passed into the front absorption bottle 21, and the absorption liquid in the front absorption bottle 21 directly absorbs the tritium water in the gas and 14Then, the gas enters the catalytic oxidation heating device 40, which decomposes the tritium and carbon 14 compounds in the gas that cannot be directly absorbed by the front-end absorption bottle 21 into tritium water and 14 CO2 is then passed into the rear absorption bottle 22, which absorbs the tritium water in the gas after catalytic oxidation and 14 CO2 to complete the sampling.

[0032] It should be noted that the number of the front-end absorption bottles 21 and the rear-end absorption bottles 22 can be set according to actual needs and is not specifically limited here. Figure 1 There are two front absorption bottles 21 and two rear absorption bottles 22.

[0033] See also Figure 3 The tritium carbon sampling system further includes a first temperature sensor 60 and a control device. The first temperature sensor 60 is disposed at the gas outlet side of the catalytic oxidation heating device 40, and the first temperature sensor 60 is used to collect the temperature of the gas at the gas outlet side of the catalytic oxidation heating device 40. The control device is electrically connected to the catalytic oxidation heating device 40 and the first temperature sensor 60, and the control device is used to control the heating temperature of the catalytic oxidation heating device 40 according to the temperature of the gas at the gas outlet side.

[0034] During operation, when the temperature of the gas at the gas outlet side of the catalytic oxidation heating device 40 is lower than the first preset temperature, the control device controls the catalytic oxidation heating device 40 to increase the heating power. In this way, the heating temperature of the catalytic oxidation heating device 40 is adjusted by the first temperature sensor 60 and the control device, so that the heating temperature of the catalytic oxidation heating device 40 can be accurately controlled.

[0035] In addition, when the temperature of the gas at the outlet side of the catalytic oxidation heating device 40 is greater than the first preset temperature, the control device controls the catalytic oxidation heating device 40 to reduce the heating power. In this way, the power of the catalytic oxidation heating device matches the gas volume, reducing the waste of heating power.

[0036] In one embodiment, the catalytic oxidation heating device 40 includes a reaction component, a preheating component and a heating component 43. The reaction component is provided with a reaction chamber for holding the catalyst, the preheating component is provided with a preheating chamber, the front section absorption bottle 21, the preheating chamber, the reaction chamber and the rear section absorption bottle 22 are sequentially connected. The heating component 43 is connected to the preheating component, and the heating component 43 is used to heat the preheating component.

[0037] During operation, the gas is filtered by the air intake device 10 and then passed into the front-end absorption bottle 21. The absorption liquid in the front-end absorption bottle 21 absorbs and samples the tritium and carbon 14 in the gas. The gas that is not absorbed by the absorption liquid in the front-end absorption bottle 21 enters the preheating chamber of the preheating component. The preheating component preheats the gas under the action of the heating component 43. The preheated gas enters the reaction chamber and undergoes a catalytic oxidation reaction with the catalyst in the reaction chamber to decompose the tritium and carbon 14 compounds in the gas that cannot be directly absorbed by the absorption liquid into tritium water and tritium water that are easily absorbed by the absorption liquid. 14 Finally, the gas after catalytic oxidation enters the rear absorption bottle 22, which absorbs the tritium water and 14 CO2 to complete the sampling.

[0038] Further, see Figure 3 The tritium carbon sampling system also includes a second temperature sensor 61, which is arranged corresponding to the heating component 43 and is used to collect the temperature of the heating component 43. The second temperature sensor 61 is electrically connected to the control device, and the control device is used to determine whether to perform temperature adjustment according to the temperature of the heating component 43. When working, the second temperature sensor 61 collects the temperature of the heating component 43 and feeds back the temperature of the heating component 43 to the control device, and the control device preferentially determines whether to perform the temperature adjustment function according to the temperature of the heating component 43 and the safety limit (~650°C).

[0039] Optionally, the heating component 43 is an electric heating wire, and a thermocouple is arranged inside the electric heating wire. Correspondingly, the second temperature sensor 61 is a temperature measuring thermocouple. Of course, in other embodiments, the heating component 43 and the second temperature sensor 61 can also be other devices, and are not limited thereto.

[0040] In one embodiment, the tritium carbon sampling system further includes a first flow sensor, which is provided corresponding to the catalytic oxidation heating device 40 and is used to detect the flow rate of the gas flowing through the catalytic oxidation heating device 40. The first flow sensor is electrically connected to the control device, and the control device is used to control the heating temperature of the catalytic oxidation heating device 40 according to the flow rate of the gas.

[0041] When working, the first flow sensor detects the flow rate and velocity of the gas flowing through the catalytic oxidation heating device 40 per unit time, and feeds back the flow rate and velocity of the gas to the control device. When the flow rate and velocity of the gas increase, the control device controls to increase the heating temperature of the heating component 43, improves the catalytic oxidation capacity of the catalytic oxidation heating device 40, ensures that the tritium-containing and carbon-14-containing substances in the gas can be thoroughly catalytically oxidized, thereby improving the accuracy and reliability of the tritium and carbon-14 detection structure.

[0042] In one embodiment, see Figure 1 The tritium carbon sampling system further includes a cooling device 50, which is connected to the absorption device 20. The cooling device 50 is used to cool the absorption liquid in the absorption device 20 to ensure the absorption effect of the absorption liquid.

[0043] Furthermore, the tritium carbon sampling system further includes a third temperature sensor, which is used to collect the ambient temperature at the location of the absorption device 20, and the third temperature sensor is electrically connected to the control device, and the control device is used to control the cooling device 50 to cool the coolant and deliver the coolant to the absorption device 20 when the ambient temperature is greater than the second preset temperature. It should be noted that the second preset temperature can be set according to actual conditions. For example, in this embodiment, the second preset temperature is 15°C.

[0044] During operation, the third temperature sensor detects the ambient temperature at the location of the absorption device 20 in real time. When the ambient temperature detected by the third temperature sensor is greater than the second preset temperature, the third temperature sensor feeds back the second preset temperature to the control device, and the control device sends cooling information to the cooling device 50. The cooling device 50 cools the coolant so that the temperature of the coolant is maintained between 0°C and 5°C. The cooled coolant is supplied to the absorption device 20, and the coolant lowers the temperature of the absorption liquid so that the temperature of the absorption liquid is maintained within the preset temperature range, for example, the temperature of the absorption liquid is maintained between 10°C and 15°C. In this way, under the action of the coolant, the cooling function of the absorption device 20 is realized, and the reliability of the sampling results of the tritium carbon sampling system is ensured.

[0045] In one embodiment, see Figure 4 The tritium carbon sampling system also includes a fourth temperature sensor 62 , which is disposed at the outlet side of the cooling device 50 , and is used to collect the temperature of the coolant flowing out of the cooling device 50 .

[0046] Specifically, the cooling device 50 is provided with a liquid outlet, and the absorption device 20 is provided with a liquid inlet, and the liquid outlet is connected to the liquid inlet. In this way, after the cooling device 50 cools the coolant, the coolant enters the absorption device 20 through the liquid outlet and the liquid inlet to cool the absorption liquid in the absorption device 20, thereby ensuring the absorption effect of the absorption liquid. The fourth temperature sensor 62 is provided at the liquid outlet, or the fourth temperature sensor 62 is provided on the pipeline between the liquid outlet and the liquid inlet.

[0047] Furthermore, the fourth temperature sensor 62 is electrically connected to the control device, and the control device is used to control the cooling device 50 to adjust the cooling temperature according to the temperature of the cooling liquid. When working, the fourth temperature sensor 62 detects the temperature of the cooling liquid flowing out of the cooling device 50. If the fourth temperature sensor 62 detects that the temperature of the cooling liquid flowing out of the cooling device 50 increases, the temperature of the cooling liquid flowing out of the cooling device 50 is fed back to the control device, and the control device controls the cooling device 50 to adjust the cooling temperature according to the temperature fluctuation of the cooling liquid, so as to ensure that the tritium carbon sampling system can sample within a predetermined temperature range. Specifically, if the temperature of the cooling liquid flowing out of the cooling device 50 increases, the control device controls the cooling device 50 to increase the cooling amount; if the temperature of the cooling liquid flowing out of the cooling device 50 decreases, the control device controls the cooling device 50 to reduce the cooling amount.

[0048] In one embodiment, see Figure 4 The cooling device 50 includes a first cooling module, which is used to cool the absorption liquid in the absorption device 20. When working, the first cooling module cools the cooling liquid and supplies the cooling liquid to the absorption device 20. The cooling liquid reduces the temperature of the absorption liquid so that the temperature of the absorption liquid is maintained within a preset temperature range. Under the action of the cooling liquid, the cooling function of the absorption device 20 is realized, ensuring the reliability of the sampling result of the tritium carbon sampling device.

[0049] Further, see Figure 5 The first cooling module includes a first liquid storage tank 51, a first pump body 54, a cooling body 52 and a first cooling pipe 53. The first liquid storage tank 51 is used to store coolant. One end of the first cooling pipe 53 is connected to the liquid outlet of the first liquid storage tank 51, and the other end of the first cooling pipe 53 is connected to the first pump body 54, the low temperature side of the cooling body 52, the absorption device 20 in sequence, and then connected to the liquid inlet of the first liquid storage tank 51 to form a first cooling circulation loop. When working, the first pump body 54 pumps the coolant from the liquid outlet of the first liquid storage tank 51 to the first cooling pipe 53, and then the coolant passes through the low temperature side of the cooling body 52 along the first cooling pipe 53. The low temperature side of the cooling body 52 releases cold energy to exchange heat with the coolant to reduce the temperature of the coolant. Then, the coolant continues to flow through the absorption device 20 along the first cooling pipe 53, so that the cooled coolant exchanges heat with the absorption liquid in the absorption device 20 to cool the absorption liquid. Finally, the cooling liquid flows back into the first liquid storage tank 51 along the first cooling pipe 53 through the liquid inlet of the first liquid storage tank 51. This cycle is repeated to achieve continuous cooling of the absorption liquid.

[0050] Optionally, the cooling body 52 is a semiconductor cooler, which can adjust the input voltage of the semiconductor cooler according to the temperature of the coolant flowing out of the liquid outlet of the cooling body 52 detected by the fourth temperature sensor 62, thereby changing the cooling output and achieving the purpose of controlling the coolant temperature.

[0051] In one embodiment, see Figure 4 and Figure 5 The cooling device 50 further includes a second cooling module, which is used to dissipate heat from the high-temperature side of the cooling body 52. ​​When the ambient temperature detected by the third temperature sensor is high, or when the fourth temperature sensor 62 detects that the temperature of the coolant flowing out of the cooling body 52 is high, the temperature of the high-temperature side of the cooling body 52 is reduced by the second cooling module, and then the temperature of the low-temperature side of the cooling body 52 is reduced, so as to reduce the temperature of the coolant, so that the temperature of the absorption liquid is maintained within a preset temperature range.

[0052] Further, see Figure 5 The second cooling module includes a second liquid storage tank 55, a second pump body, a heat sink 56, a fan 57 and a second cooling pipe 59. The second liquid storage tank 55 is also used to store coolant. One end of the second cooling pipe 59 is connected to the liquid outlet of the second liquid storage tank 55, and the other end of the second cooling pipe 59 is connected to the liquid inlet of the second liquid storage tank 55 after passing through the second pump body, the high temperature side of the cooling body 52 and the heat sink 56 to form a second cooling circulation loop. The fan 57 is connected to the heat sink 56, and the air outlet side of the fan 57 faces the heat sink 56. When working, the second pump body pumps the coolant from the liquid outlet of the second liquid storage tank 55 to the second cooling pipe 59. Then, the coolant passes through the high temperature side of the cooling body 52 along the second cooling pipe 59, and the coolant exchanges heat with the high temperature side of the cooling body 52 to reduce the temperature of the high temperature side of the cooling body 52, thereby ensuring the safe operation of the cooling body 52. Then, the high-temperature coolant after heat exchange continues to flow through the heat sink 56 along the second cooling pipe 59, and the fan 57 blows air to the heat sink 56 to reduce the temperature of the coolant flowing through the heat sink 56. Finally, the cooled coolant flows back to the second liquid storage tank 55 from the liquid inlet of the second liquid storage tank 55 along the second cooling pipe 59. In this cycle, continuous heat dissipation of the high-temperature side of the cooling body 52 is achieved.

[0053] In one embodiment, the first liquid storage tank 51 and / or the second liquid storage tank 55 are provided with a liquid level sensor. The tritium carbon sampling system also includes an alarm, and the control device is electrically connected to the liquid level sensor and the alarm. The control device is used to control the alarm to send a corresponding alarm message when the liquid level of the coolant in the first liquid storage tank 51 and / or the second liquid storage tank 55 is lower than the preset liquid level. When the liquid level of the coolant in the first liquid storage tank 51 and / or the second liquid storage tank 55 is lower than the preset liquid level, the liquid level sensor feeds the information back to the control device, and the control device controls the alarm to send a corresponding alarm message to remind the staff to handle it in time. In this way, it can ensure that the coolant is maintained at the preset liquid level height, avoid the tritium carbon sampling device from being unable to accurately sample due to coolant leakage, etc., and improve the safety of the operation.

[0054] Optionally, the alarm is a buzzer, an audible and visual alarm, etc., but is not limited thereto.

[0055] In one embodiment, see Figure 2 The air intake device 10 includes a coarse filter 11 and at least one fine filter which are sequentially connected through a gas pipeline. Optionally, two fine filters are provided, namely a first fine filter 12 and a second fine filter 13. The coarse filter 11, the first fine filter 12 and the second fine filter 13 are sequentially arranged along the gas path direction. In this way, by providing the coarse filter 11 and at least one fine filter, the gas is filtered through multiple filters, which is conducive to improving the filtering effect of the gas and better removing impurities in the gas, thereby helping to improve the reliability of the tritium carbon sampling results.

[0056] In this embodiment, the coarse filter 11 mainly filters particles larger than 100 μm, and the fine filter mainly filters particles larger than 2 μm and has the characteristic of preventing liquid from passing through.

[0057] Further, see Figure 2 The tritium carbon sampling system further includes a first pressure sensor 80. The first pressure sensor 80 is disposed between the coarse filter 11 and the first fine filter along the air intake direction, and the first pressure sensor 80 is used to collect the pressure of the air path between the coarse filter 11 and the first fine filter along the air intake direction. Specifically, the first pressure sensor 80 is disposed between the coarse filter 11 and the first fine filter 12.

[0058] Further, see Figure 2 The second pressure sensor 81 is disposed at the outlet side of the last fine filter along the air intake direction. Specifically, the second pressure sensor 81 is disposed at the outlet side of the second fine filter 13 .

[0059] By calculating the reading difference between the first pressure sensor 80 and the second pressure sensor, the resistance loss of the gas pipeline between the first pressure sensor 80 and the second pressure sensor can be obtained. When the resistance loss exceeds the predetermined threshold, it can be determined that the fine filter is clogged, and the staff can be reminded in time to replace the fine filter in time to ensure smooth air intake of the tritium carbon sampling system, thereby ensuring the accuracy of the sampling results of the tritium carbon sampling system.

[0060] Furthermore, the control device is used to control the alarm to work when the reading difference between the first pressure sensor 80 and the second pressure sensor 81 exceeds the pressure threshold. In this way, when the reading difference between the first pressure sensor 80 and the second pressure sensor 81 exceeds the pressure threshold, the control device controls the alarm to send out corresponding alarm information to remind the staff to replace the fine filter in time to ensure smooth air intake of the tritium carbon sampling system, thereby ensuring the accuracy of the sampling results of the tritium carbon sampling system.

[0061] In one embodiment, see Figure 2 The tritium carbon sampling system further includes a second flow sensor 71, which is arranged on the intake pipe. By arranging the second flow sensor 71 on the intake pipe, the second flow sensor 71, the first pressure sensor 80 and the second pressure sensor 81 jointly monitor the intake condition of the intake device 10, thereby avoiding the failure to timely discover the fault problem caused by inaccurate detection of the first pressure sensor 80 and the second pressure sensor 81, thereby ensuring the normal monitoring and absorption of tritium and carbon 14 in the gas.

[0062] In this embodiment, refer to Figure 2 , the second flow sensor 71 is disposed between the first fine filter 12 and the second fine filter 13. Of course, in other embodiments, the second flow sensor 71 may also be disposed at other positions of the intake pipe, and is not limited thereto.

[0063] In one embodiment, see Figure 6 The tritium carbon sampling system further includes a third pressure sensor 82, which is disposed at the air inlet side of the gas extraction device 30, for example, the third pressure sensor 82 is disposed between the rear absorption bottle 22 and the gas extraction device 30, and the third pressure sensor 82 is used to collect the pressure of the gas entering the gas extraction device 30. Optionally, the third pressure sensor 82 is a pressure display device. When the third pressure sensor 82 detects that the pressure of the gas entering the gas extraction device 30 is less than a preset pressure value, it proves that the gas pipeline is blocked, resulting in a vacuum in the gas extraction device 30, so as to prompt the staff to inspect and repair the tritium carbon sampling system.

[0064] When the third pressure sensor 82 detects that the pressure of the gas entering the air extraction device 30 is less than the first preset pressure value, the control device controls the alarm to send out a corresponding alarm message to remind the staff to repair the tritium carbon sampling system in time.

[0065] When the third pressure sensor 82 detects that the pressure of the gas entering the gas extraction device 30 is less than the second preset pressure value, the control device controls the tritium carbon sampling system to stop working and controls the alarm to send a corresponding alarm signal. The second preset pressure value is less than the first preset pressure value.

[0066] During the sampling process, due to the defects of low tritium and carbon 14 content in the gas to be sampled, if the flow rate of the collected gas is too small, the sample collected by the tritium carbon sampling system will inevitably be difficult to analyze. Therefore, during use, the flow rate needs to be adjusted to meet the needs of more use environments. Therefore, in the actual use process, the flow rate of the sampled gas is adjusted by controlling the suction device 30 and adjusting the suction frequency of the suction device 30.

[0067] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0068] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0069] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0070] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0071] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0072] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0073] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A tritium carbon sampling system, characterized in that: include: An air inlet device, an absorption device and an air extraction device connected in sequence, wherein the absorption device comprises a front absorption bottle and a rear absorption bottle connected to the front absorption bottle, the front absorption bottle is connected to the air inlet device, and the rear absorption bottle is connected to the air extraction device; A catalytic oxidation heating device, wherein the catalytic oxidation heating device is provided with an air inlet and an air outlet connected to the air inlet, wherein the air inlet is connected to the front-stage absorption bottle, and the air outlet is connected to the rear-stage absorption bottle; A first temperature sensor, the first temperature sensor is arranged at the gas outlet side of the catalytic oxidation heating device, and the first temperature sensor is used to collect the temperature of the gas at the gas outlet side of the catalytic oxidation heating device; and A control device, the control device is electrically connected to the catalytic oxidation heating device and the first temperature sensor, and the control device is used to control the heating temperature of the catalytic oxidation heating device according to the temperature of the gas on the outlet side.

2. The tritium carbon sampling system according to claim 1, characterized in that: The catalytic oxidation heating device includes a reaction component, a preheating component and a heating component. The reaction component is provided with a reaction chamber for holding a catalyst, the preheating component is provided with a preheating chamber, the front-end absorption bottle, the preheating chamber, the reaction chamber and the rear-end absorption bottle are connected in sequence; the heating component is connected to the preheating component, and the heating component is used to heat the preheating component.

3. The tritium carbon sampling system according to claim 2, characterized in that: The tritium carbon sampling system also includes a second temperature sensor, which is set corresponding to the heating component and is used to collect the heating temperature of the heating component; the second temperature sensor is electrically connected to the control device, and the control device is used to determine whether to adjust the temperature according to the temperature of the heating component.

4. The tritium carbon sampling system according to claim 2, characterized in that: The tritium carbon sampling system also includes a first flow sensor, which is arranged corresponding to the catalytic oxidation heating device. The first flow sensor is used to detect the flow rate of the gas flowing through the catalytic oxidation heating device. The first flow sensor is electrically connected to the control device, and the control device is used to control the heating temperature of the catalytic oxidation heating device according to the flow rate of the gas.

5. The tritium carbon sampling system according to claim 1, characterized in that: The tritium carbon sampling system also includes a cooling device, which is connected to the absorption device; The tritium carbon sampling system also includes a third temperature sensor, which is used to collect the ambient temperature of the location where the absorption device is located. The third temperature sensor is electrically connected to the control device. When the ambient temperature is greater than a preset temperature, the control device is used to control the cooling device to cool the coolant and control the cooling device to deliver the coolant to the absorption device.

6. The tritium carbon sampling system according to claim 5, characterized in that: The tritium carbon sampling system further includes a fourth temperature sensor, which is disposed at the outlet side of the cooling device and is used to collect the temperature of the coolant flowing out of the cooling device; The fourth temperature sensor is electrically connected to the control device, and the control device is used to control the cooling device to adjust the cooling temperature according to the temperature of the coolant.

7. The tritium carbon sampling system according to any one of claims 1 to 6, characterized in that: The air intake device comprises a coarse filter and at least one fine filter which are sequentially connected through a gas pipeline; The tritium carbon sampling system also includes a first pressure sensor and a second pressure sensor. The first pressure sensor is arranged between the coarse filter and the first fine filter along the air intake direction, and the second pressure sensor is arranged on the air outlet side of the last fine filter along the air intake direction.

8. The tritium carbon sampling system according to claim 7, characterized in that: The tritium carbon sampling system further includes a second flow sensor, which is disposed on the gas pipeline.

9. The tritium carbon sampling system according to claim 7, characterized in that: The tritium carbon sampling system further comprises an alarm, which is electrically connected to the control device. The control device is used to control the alarm to operate when the reading difference between the first pressure sensor and the second pressure sensor exceeds a pressure threshold.

10. The tritium carbon sampling system according to claim 9, characterized in that: The tritium carbon sampling system also includes a third pressure sensor, which is arranged on the air inlet side of the air extraction device; the third pressure sensor is electrically connected to the control device, and the control device is used to control the alarm to work when the pressure of the gas collected by the third pressure sensor is lower than a preset pressure.

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