A nuclear sampling system gas sampling device

Abstract

This invention specifically relates to a gas sampling device for a nuclear sampling system, comprising a sampling device, a vapor-liquid separation device, an online gas measurement device, and an automatic nitrogen purging device. The vapor-liquid separation device includes a vapor-liquid separator, an exhaust gas discharge pipeline, and an automatic waste liquid discharge pipeline. The sampling device includes multiple sampling pipelines, each connected to the vapor-liquid separator at its port and connected to the inlet of the online gas measurement device via an instrument measurement bypass pipeline. The outlet of the online gas measurement device is connected to the exhaust gas discharge pipeline via an instrument measurement gas outlet pipeline. Each sampling pipeline, each instrument measurement bypass pipeline, each instrument measurement gas outlet pipeline, each exhaust gas discharge pipeline, each automatic waste liquid discharge pipeline, and each nitrogen purging pipeline is equipped with an isolation valve. The nuclear sampling system gas sampling device of this invention enables simultaneous multi-point purging and sampling, automatic hydrophobication of gas samples, real-time online measurement of gas content, and automatic nitrogen backpurging.

Description

Technical Field

[0001] This invention relates to the field of chemical analysis in nuclear power plants, and in particular to a gas sampling device for a nuclear sampling system. Background Technology

[0002] The nuclear sampling system is a crucial auxiliary system in nuclear power plants, and its normal and stable operation is essential for ensuring the safe and efficient operation of the plant. The main function of the nuclear sampling system is to obtain liquid and gas samples from the reactor coolant loop, steam generator secondary loop, waste liquid and waste gas treatment systems, and auxiliary systems for chemical and radiochemical analysis. Gas sampling primarily collects radioactive gases and hydrogen- and oxygen-containing waste gas samples from the boron recovery system, waste gas treatment system, reactor coolant system, chemical and volume control system, and nuclear island hydrophobic venting system. These gas samples are transported to gas fume hoods and extracted using specially designed sampling steel bullets.

[0003] The existing nuclear sampling system's gas sampling device has only one exhaust line, preventing simultaneous purging and sampling at the sampling point. This results in prolonged sampling time, low efficiency, and impacts the critical path for unit overhaul. Furthermore, samples containing water vapor in the sampling line form large amounts of condensate in the line and the gas sampling cartridge, causing "water blockage" and hindering normal gas sampling. While nitrogen backflushing can resolve this water blockage issue, the lack of a regulating valve on the local nitrogen line means the pressure cannot be controlled, potentially triggering safety valves on related containers. Additionally, each nitrogen backflushing operation requires the combined efforts of operations, chemical, and mechanical personnel, resulting in a heavy workload and disrupting normal operations. Summary of the Invention

[0004] Therefore, it is necessary to address the problems of water blockage, long analysis time, and low efficiency in existing nuclear sampling system gas sampling devices, and to provide a nuclear sampling system gas sampling device that can achieve simultaneous purging and sampling at multiple points, automatically and continuously discharge condensate water from sampling pipelines and devices, measure the content of radioactive gases and hydrogen and oxygen gases online in real time, and automatically back-purge nitrogen.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A gas sampling device for a nuclear sampling system includes a sampling device, a vapor-liquid separation device, an online gas measurement device, and an automatic nitrogen purging device. The vapor-liquid separation device includes a vapor-liquid separator, an exhaust gas discharge line, and an automatic waste liquid discharge line. The top of the vapor-liquid separator is connected to the exhaust gas discharge line, and the bottom of the vapor-liquid separator is connected to the automatic waste liquid discharge line. The sampling device includes multiple sampling lines. Each sampling line has a quick connector at one end and is connected to the vapor-liquid separator at the other end. Each sampling line is connected to the inlet quick connector of the online gas measurement device via an instrumentation bypass line. The device outlet is connected to the exhaust gas emission pipeline via an instrument measurement gas outlet pipeline; the automatic nitrogen purging device includes a nitrogen purging pipeline, with quick connectors at both ends; each sampling pipeline is equipped with an independent sampling inlet isolation valve, each instrument measurement bypass pipeline is equipped with an instrument measurement inlet isolation valve, the instrument measurement gas outlet pipeline is equipped with an instrument measurement gas outlet isolation valve, the exhaust gas emission pipeline is equipped with a gas outlet isolation valve, the automatic waste liquid discharge pipeline is equipped with an automatic condensate isolation valve, and the nitrogen purging pipeline is equipped with a nitrogen pipeline inlet isolation valve and a nitrogen pipeline outlet isolation valve.

[0007] Working Principle: Using the gas sampling device of this invention's nuclear sampling system, first connect each sampling pipeline port to the quick-connect fitting at the outlet of the container under test, connect the exhaust gas emission pipeline to the quick-connect fitting of the exhaust gas receiving system, and connect the automatic waste liquid emission pipeline to the quick-connect fitting of the waste liquid receiving system. Then open the sampling inlet isolation valve on each sampling pipeline, the gas outlet isolation valve on the exhaust gas emission pipeline, and the automatic condensate isolation valve on the waste liquid emission pipeline. The gas in the container under test flows through the sampling pipeline into the gas-liquid separator, descends by gravity, and the waste liquid collects at the bottom of the gas-liquid separator. The gas is then discharged to the exhaust gas receiving system through the exhaust gas emission pipeline. When the waste liquid in the gas-liquid separator reaches a certain level, the automatic condensate isolation valve automatically opens, discharging the gas to the waste liquid receiving system through the automatic waste liquid emission pipeline. When the waste liquid in the gas-liquid separator drops to a certain level, the automatic condensate isolation valve automatically closes to prevent the gas under test from overflowing. After the gas to be tested flows through the gas sampling device for a period of time, one instrument measurement bypass line is connected to the quick-connect fitting at the inlet of the online gas measurement device each time, and the corresponding instrument measurement inlet isolation valve is opened. The sampled gas flows through the online gas measurement device to measure the content of radioactive gas or hydrogen and oxygen gas. After the measurement is completed, the instrument measurement gas outlet isolation valve is opened, and the measured gas is discharged to the waste gas receiving system through the waste gas emission pipeline. If the gas sampling line of the container under test is blocked by water and cannot be drained through the gas-water separator, it is purged through the nitrogen purging line. The nitrogen purging line inlet is connected to the nitrogen gas source quick-connect fitting, and the nitrogen purging line is connected to the gas sampling outlet quick-connect fitting of the container to be purged. The nitrogen line inlet isolation valve and the nitrogen line outlet isolation valve are opened to purge the gas sampling line of the container under test.

[0008] Furthermore, each sampling pipeline has a sampling quick connector without a valve body at one end, and the other end is connected to the upper part of the gas-water separator; each gas sampling pipeline is equipped with a sampling inlet isolation valve, an adjustable gas flow meter, a manual gas sampling port, and a pipeline check valve from left to right; each gas sampling pipeline is connected to the gas online measurement device through an instrument measurement bypass pipeline; each instrument measurement bypass pipeline has one end connected to the corresponding gas sampling pipeline, and the other end connected to the gas online measurement device through an instrument measurement inlet quick connector; each instrument measurement bypass pipeline is equipped with an instrument measurement inlet isolation valve.

[0009] Furthermore, the nitrogen purging pipeline has a nitrogen inlet quick connector at one end and a nitrogen outlet quick connector at the other end; the nitrogen purging pipeline is provided with a nitrogen inlet isolation valve, a nitrogen pressure regulating valve, a nitrogen pressure gauge and a nitrogen outlet isolation valve in sequence from left to right.

[0010] Furthermore, the steam-water separator is equipped with a pressure gauge and a level gauge to monitor the internal pressure and level of the steam-water separator; the steam-water separation device also includes a manual waste liquid discharge line; one end of the automatic waste liquid discharge line is connected to the steam-water separator, and the other end is equipped with an automatic drain quick connector, and the automatic waste liquid discharge line is equipped with an automatic drain isolation valve; one end of the manual waste liquid discharge line is connected to the steam-water separator, and the other end is equipped with a manual drain quick connector, and the manual waste liquid discharge line is equipped with a manual drain isolation valve on the waste liquid.

[0011] Furthermore, one end of the exhaust gas emission pipeline is connected to a steam-water separator, and the other end is equipped with a quick-connect gas outlet; a gas outlet isolation valve is provided on the exhaust gas emission pipeline.

[0012] Furthermore, the online gas measurement device includes a gas content measurement module; the exhaust gas emission pipeline between the gas-water separator and the gas outlet isolation valve is connected to the gas content measurement module via an instrument gas outlet pipeline; one port of the instrument gas outlet pipeline is connected to the exhaust gas emission pipeline, and the other port is equipped with an instrument gas outlet quick connector; the instrument gas outlet pipeline is connected to the gas content measurement module via the instrument gas outlet quick connector, and an instrument gas outlet isolation valve is provided on the instrument gas outlet pipeline.

[0013] Furthermore, the gas content measurement module is a radioactive gas content measurement module or a hydrogen and oxygen gas content measurement module.

[0014] Furthermore, the hydrogen and oxygen gas content measurement module is a hydrogen and oxygen measurement and analysis instrument.

[0015] Beneficial technical effects of the present invention:

[0016] The nuclear sampling system gas sampling device of this invention enables simultaneous multi-point purging and sampling, reducing sampling and analysis time and improving efficiency; it achieves vapor-water separation in the sample and can automatically and continuously discharge condensate from the sampling pipeline and device, completely solving the problems of water blockage and drainage during the sampling process; it enables online real-time hydrogen and oxygen measurement, reducing the frequency of manual sampling and analysis; it enables automatic nitrogen back-purging; the device adopts modular integrated installation, is small in size and weight, simple to operate, easy to install, portable, and easy to maintain. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the gas sampling device structure of the nuclear sampling system in Example 1.

[0018] In the diagram, 1. Sampling line A; 11. Sampling quick connector A; 12. Sampling inlet isolation valve A; 13. Adjustable gas flow meter A; 14. Manual gas sampling port A; 15. Line check valve A; 16. Instrument measurement bypass line A; 17. Instrument measurement inlet isolation valve A; 18. Instrument measurement inlet quick connector A; 2. Sampling line B; 21. Sampling quick connector B; 22. Sampling inlet isolation valve B; 23. Adjustable gas flow meter B; 24. Manual gas sampling port B; 25. Line check valve B; 26. Instrument measurement bypass line B; 27. Instrument measurement inlet isolation valve B; 28. Instrument measurement inlet quick connector B; 3. Sampling line C; 31. Sampling quick connector C; 32. Sampling inlet isolation valve C; 33. Adjustable gas flow meter C; 34. Manual gas sampling port C; 35. Line check valve C; 6. Instrument measurement bypass line C; 37. Instrument measurement inlet isolation valve C; 38. Instrument measurement inlet quick connector C; 4. Nitrogen purging line; 41. Nitrogen line inlet quick connector; 42. Nitrogen line inlet isolation valve; 43. Nitrogen pressure regulating valve; 44. Nitrogen line pressure gauge; 45. Nitrogen line outlet isolation valve; 46. Nitrogen line outlet quick connector; 5. Gas-liquid separator; 51. Gas-liquid separator; 52. Pressure gauge; 53. Level gauge; 54. Automatic drain isolation valve; 55. Automatic drain quick connector; 56. Manual drain isolation valve; 57. Manual drain quick connector; 6. Exhaust gas emission line; 61. Gas outlet isolation valve; 62. Gas outlet quick connector; 7. Online gas measurement device; 71. Gas content measurement module; 72. Gas outlet quick connector; 73. Instrument measurement gas outlet isolation valve. Detailed Implementation

[0019] In the description of this invention, it should be understood that the terms "top", "bottom", "above", "below", "outer", "inner", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0020] This invention provides a gas sampling device for a nuclear sampling system, comprising a sampling device, a vapor-liquid separation device 5, an online gas measurement device 7, and an automatic nitrogen purging device. The vapor-liquid separation device 5 includes a vapor-liquid separator 51, an exhaust gas discharge line 6, and an automatic waste liquid discharge line. The top of the vapor-liquid separator 51 is connected to the exhaust gas discharge line 6, and the bottom of the vapor-liquid separator 51 is connected to the automatic waste liquid discharge line. The sampling device includes multiple sampling lines. Each sampling line has a quick connector at one end and is connected to the vapor-liquid separator 51 at the other end. Each sampling line is connected to the inlet quick connector of the online gas measurement device 7 via an instrumentation bypass line. The outlet of the measuring device 7 is connected to the exhaust gas emission pipeline 6 via the instrument measuring gas outlet pipeline; the automatic nitrogen purging device includes a nitrogen purging pipeline 4, both ends of which are equipped with quick connectors; each sampling pipeline is equipped with an independent sampling inlet isolation valve, each instrument measuring bypass pipeline is equipped with an instrument measuring inlet isolation valve, the instrument measuring gas outlet pipeline is equipped with an instrument measuring gas outlet isolation valve 73, the exhaust gas emission pipeline 6 is equipped with a gas outlet isolation valve 61, the automatic waste liquid discharge pipeline is equipped with an automatic condensate isolation valve 54, and the nitrogen purging pipeline 4 is equipped with a nitrogen pipeline inlet isolation valve 42 and a nitrogen pipeline outlet isolation valve 45.

[0021] Using the gas sampling device of the nuclear sampling system of this invention, first connect the port of each sampling pipeline to the quick connector at the outlet of the container to be tested, connect the exhaust gas emission pipeline 6 to the quick connector at the exhaust gas receiving system, and connect the automatic waste liquid emission pipeline to the quick connector at the waste liquid receiving system. Then open the sampling inlet isolation valve on each sampling pipeline, the gas outlet isolation valve 61 on the exhaust gas emission pipeline 6, and the automatic condensate isolation valve 54 on the waste liquid emission pipeline. The gas in the container to be tested flows through the sampling pipeline into the gas-liquid separator 51, descends by gravity, and the waste liquid collects at the bottom of the gas-liquid separator 51. The gas is then discharged to the exhaust gas receiving system through the exhaust gas emission pipeline 6. When the waste liquid in the gas-liquid separator 51 reaches a certain level, the automatic condensate isolation valve 54 automatically opens, discharging the gas to the waste liquid receiving system through the automatic waste liquid emission pipeline. When the waste liquid in the gas-liquid separator 51 drops to a certain level, the automatic condensate isolation valve 54 automatically closes to prevent the gas to be tested from overflowing. After the gas to be tested flows through the gas sampling device for a period of time, one instrument measurement bypass line is connected to the inlet quick connector of the online gas measurement device 7 each time, and the corresponding instrument measurement inlet isolation valve is opened. The sampled gas flows through the online gas measurement device 7 to measure the content of radioactive gas or hydrogen and oxygen gas. After the measurement is completed, the instrument measurement gas outlet isolation valve 73 is opened, and the measured gas is discharged to the waste gas receiving system through the waste gas emission line 6. If the gas sampling line of the container under test is blocked by water and cannot be drained through the gas-water separator 5, it is purged through the nitrogen purging line 4. The inlet of the nitrogen purging line 4 is connected to the nitrogen gas source quick connector, and the nitrogen purging line 4 is connected to the gas sampling outlet quick connector of the container to be purged. The nitrogen line inlet isolation valve 42 and the nitrogen line outlet isolation valve 45 are opened to purge the gas sampling line of the container under test.

[0022] Furthermore, each sampling pipeline has a sampling quick connector without a valve body at one end, and the other end is connected to the upper part of the gas-water separator 51; each gas sampling pipeline is equipped with a sampling inlet isolation valve, an adjustable gas flow meter, a manual gas sampling port, and a pipeline check valve from left to right; each gas sampling pipeline is connected to the online gas measurement device 7 through an instrument measurement bypass pipeline; one end of each instrument measurement bypass pipeline is connected to the corresponding gas sampling pipeline, and the other end is connected to the online gas measurement device 7 through an instrument measurement inlet quick connector; each instrument measurement bypass pipeline is equipped with an instrument measurement inlet isolation valve. Each gas sampling pipeline is equipped with an independent sampling inlet isolation valve, which allows for multi-point sampling and purging.

[0023] Furthermore, the nitrogen purging line 4 has a nitrogen inlet quick connector 41 at one end and a nitrogen outlet quick connector 46 at the other end; the nitrogen purging line 4 is equipped with a nitrogen inlet isolation valve 42, a nitrogen pressure regulating valve 43, a nitrogen pressure gauge 44, and a nitrogen outlet isolation valve 45, arranged sequentially from left to right. The addition of a pressure regulating valve and pressure gauge pipeline to the automatic nitrogen purging device enables nitrogen backflushing.

[0024] Furthermore, the gas-water separator 51 is equipped with a pressure gauge 52 and a level gauge 53 for monitoring the internal pressure and level of the gas-water separator 51. The gas-water separation device 5 also includes a manual waste liquid discharge line. One end of the automatic waste liquid discharge line is connected to the gas-water separator 51, and the other end is equipped with an automatic drain quick connector 55. An automatic drain isolation valve 54 is provided on the automatic waste liquid discharge line. One end of the manual waste liquid discharge line is connected to the gas-water separator 51, and the other end is equipped with a manual drain quick connector 57. A manual drain isolation valve 56 is provided on the waste liquid of the manual waste liquid discharge line. The gas-water separation device can simultaneously perform gas-water separation and automatic draining, effectively separating the gas-water mixture and continuously and automatically discharging accumulated water, while radioactive gas and hydrogen-containing gas in the pipeline will not overflow. The gas-water separator requires no auxiliary power and can operate continuously, draining water as it is available and automatically shutting off when water is gone. The internal cavity has a liquid seal of a certain height, ensuring tight gas control and preventing gas leakage during operation. It features fully mechanical controls, a compact structure with few accessories, and no electrical measuring equipment, making installation and maintenance convenient. The internal cavity facilitates the settling of contaminants, and regular drainage effectively extends the service life of the drain outlet sealing surface, ensuring tight gas control.

[0025] Furthermore, one end of the exhaust gas emission pipeline 6 is connected to the steam-water separator 51, and the other end is equipped with a gas outlet quick connector 62; the exhaust gas emission pipeline 6 is equipped with a gas outlet isolation valve 61.

[0026] Furthermore, the online gas measurement device 7 includes a gas content measurement module 71; the exhaust gas emission pipeline 6 between the gas-water separator 51 and the gas outlet isolation valve 61 is connected to the gas content measurement module 71 via an instrument gas outlet pipeline; one port of the instrument gas outlet pipeline is connected to the exhaust gas emission pipeline 6, and the other port is equipped with an instrument gas outlet quick connector 72; the instrument gas outlet pipeline is connected to the gas content measurement module 71 via the instrument gas outlet quick connector 72, and an instrument gas outlet isolation valve 73 is provided on the instrument gas outlet pipeline. The online gas measurement device 7 adds a bypass and instrument interface at the gas pipeline inlet, and installs an easy-to-maintain hydrogen and oxygen measuring analyzer to achieve online real-time monitoring.

[0027] Furthermore, the gas content measurement module 71 is a radioactive gas content measurement module or a hydrogen and oxygen gas content measurement module.

[0028] The nuclear sampling system gas sampling device provided by this invention can realize multi-point simultaneous purging and sampling, automatically and continuously discharge condensate in the sampling pipeline and device, measure the content of radioactive gas and hydrogen and oxygen gas online in real time, and automatically back purge with nitrogen.

[0029] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0030] Example 1

[0031] See Figure 1 The present invention provides a gas sampling device for a nuclear sampling system, including a sampling device, a gas-liquid separation device 5, an online gas measurement device 7, and an automatic nitrogen purging device.

[0032] The sampling device includes sampling line A1, sampling line B2 and sampling line C3.

[0033] One end of the sampling pipeline A1 is equipped with a sampling quick connector A11 without a valve body, and the other end is connected to the upper part of the gas-water separator 51. From left to right, the sampling pipeline A1 is equipped with a sampling inlet isolation valve A12, an adjustable gas flow meter A13, a manual gas sampling port A14, and a pipeline check valve A15. The sampling pipeline A1 between the manual gas sampling port A14 and the pipeline check valve A15 is connected to the inlet of the hydrogen and oxygen gas content measurement module 71 through the instrument measurement bypass pipeline A16. One end of the instrument measurement bypass pipeline A16 is connected to the sampling pipeline A1, and the other end is connected to the hydrogen and oxygen gas content measurement module 71 through the instrument measurement inlet quick connector A18. The instrument measurement bypass pipeline A16 is equipped with an instrument measurement inlet isolation valve A17.

[0034] One end of the sampling pipeline B2 is equipped with a sampling quick connector B21 without a valve body, and the other end is connected to the upper part of the gas-water separator 51. From left to right, the sampling pipeline B2 is equipped with a sampling inlet isolation valve B22, an adjustable gas flow meter B23, a manual gas sampling port B24, and a pipeline check valve B25. The sampling pipeline B2 between the manual gas sampling port B24 and the pipeline check valve B25 is connected to the inlet of the hydrogen and oxygen gas content measurement module 71 through the instrument measurement bypass pipeline B26. One end of the instrument measurement bypass pipeline B26 is connected to the sampling pipeline B2, and the other end is connected to the hydrogen and oxygen gas content measurement module 71 through the instrument measurement inlet quick connector B28. The instrument measurement bypass pipeline B26 is equipped with an instrument measurement inlet isolation valve B27.

[0035] One end of the sampling pipeline C3 is equipped with a sampling quick connector C31 without a valve body, and the other end is connected to the upper part of the gas-water separator 51. From left to right, the sampling pipeline C3 is equipped with a sampling inlet isolation valve C32, an adjustable gas flow meter C33, a manual gas sampling port C34, and a pipeline check valve C35. The sampling pipeline C3 between the manual gas sampling port C34 and the pipeline check valve C35 is connected to the hydrogen and oxygen gas content measurement module 71 through the instrument measurement bypass pipeline C36. One end of the instrument measurement bypass pipeline C36 is connected to the sampling pipeline C3, and the other end is connected to the hydrogen and oxygen gas content measurement module 717 through the instrument measurement inlet quick connector C38. The instrument measurement bypass pipeline C36 is equipped with an instrument measurement inlet isolation valve C37.

[0036] The automatic nitrogen purging device includes a nitrogen purging pipeline 4; one end of the nitrogen purging pipeline 4 is provided with a nitrogen pipeline inlet quick connector 41, and the other end is provided with a nitrogen pipeline outlet quick connector 46; from left to right, the nitrogen purging pipeline 4 is provided with a nitrogen pipeline inlet isolation valve 42, a nitrogen pressure regulating valve 43, a nitrogen pipeline pressure gauge 44, and a nitrogen pipeline outlet isolation valve 45.

[0037] The steam-water separation device 5 includes a steam-water separator 51, a pressure gauge 52, a level gauge 53, a waste liquid discharge pipeline, and a waste gas discharge pipeline 6. The steam-water separator 51 is equipped with a pressure gauge 52 and a level gauge 53 for monitoring the pressure and liquid level inside the steam-water separator 51. The top of the steam-water separator 51 is connected to the waste gas discharge pipeline 6, and the bottom of the steam-water separator 51 is connected to the waste liquid discharge pipeline.

[0038] The waste liquid discharge pipeline includes an automatic waste liquid discharge pipeline and a manual waste liquid discharge pipeline; one port of the automatic waste liquid discharge pipeline is connected to the steam-water separator 51, and the other port is equipped with an automatic drain quick connector 55; the automatic waste liquid discharge pipeline is equipped with an automatic drain isolation valve 54; one port of the manual waste liquid discharge pipeline is connected to the steam-water separator 51, and the other port is equipped with a manual drain quick connector 57; the manual waste liquid discharge pipeline is equipped with a manual drain isolation valve 56 on the waste liquid.

[0039] One end of the exhaust gas emission pipeline 6 is connected to the steam-water separator 51, and the other end is equipped with a gas outlet quick connector 62; the exhaust gas emission pipeline 6 is equipped with a gas outlet isolation valve 61.

[0040] The online gas measuring device 7 includes a hydrogen and oxygen gas content measuring module 71, an instrument measuring gas outlet quick connector 72, and an instrument measuring gas outlet isolation valve 73.

[0041] The exhaust gas pipeline 6 between the gas-water separator 51 and the gas outlet isolation valve 61 is connected to the hydrogen and oxygen gas content measuring module 71 via an instrument measuring gas outlet pipeline; one port of the instrument measuring gas outlet pipeline is connected to the exhaust gas pipeline 6, and the other port is equipped with an instrument measuring gas outlet quick connector 72; the instrument measuring gas outlet pipeline is connected to the hydrogen and oxygen gas content measuring module 71 via the instrument measuring gas outlet quick connector 72; an instrument measuring gas outlet isolation valve 73 is provided on the instrument measuring gas outlet pipeline.

[0042] Using the gas sampling device of the nuclear sampling system of this invention, first connect sampling quick connectors A11, B21, and C31 to the outlet quick connector of the container under test, respectively; connect gas outlet quick connector 62 to the waste gas receiving system; and connect automatic condensate quick connector A55 to the waste liquid receiving system. Then open sampling inlet isolation valves A12, B22, and C32, gas outlet isolation valve 61, and automatic condensate isolation valve 54. Adjust adjustable gas flow meters A13, B23, and C33 respectively to ensure the gas flow rate in the sampling pipeline meets the sampling requirements. The gas in the container under test can only pass through pipeline check valves A15, B25, and C35 in one direction only to avoid backflow of gas caused by pressure imbalance in the container under test. The gas inside the test container flows through the sampling pipeline into the gas-liquid separator 51. The condensate in the gas falls due to gravity, and the waste liquid collects at the bottom of the gas-liquid separator 51. The gas is then discharged to the waste gas receiving system through the waste gas discharge pipeline 6. When the waste liquid in the gas-liquid separator 51 reaches a certain level, the automatic drain isolation valve 54 automatically opens, discharging the waste liquid through the automatic waste liquid discharge pipeline to the waste liquid receiving system. When the waste liquid in the gas-liquid separator 51 drops to a certain level, the automatic drain isolation valve 54 automatically closes to prevent the test gas from overflowing.

[0043] The pressure and liquid level inside the steam-water separator 51 can be observed in real time using pressure gauge 52 and level gauge 53. When the automatic waste liquid discharge line fails, disconnect the automatic waste liquid discharge line and connect the manual waste liquid discharge line to the waste liquid receiving system through manual drain quick connector 57. When the waste liquid in the steam-water separator 51 reaches a certain level, manually open the manual drain quick connector 57 to discharge the waste liquid to the waste liquid receiving system through the manual waste liquid discharge line.

[0044] After the gas to be tested flows through the gas sampling device for a period of time, manual or online measurement is performed.

[0045] For manual measurements, samples are manually taken using a gas sampling syringe at manual gas sampling ports A14, B24, and C34 and sent to the laboratory for instrument analysis and testing. For online measurements, the instrument measurement inlet quick connector A18, B28, or C38 is connected to the inlet of the hydrogen and oxygen gas content measurement module 71 each time. Only one container can be measured at a time. The instrument measurement gas outlet quick connector 72 is connected to the outlet of the hydrogen and oxygen gas content measurement module 71, and the corresponding instrument measurement inlet isolation valve is opened. The sampled gas flows through the hydrogen and oxygen gas content measurement module 71 for hydrogen and oxygen gas content measurement. The measured gas is then discharged to the gas emission pipeline through the outlet isolation valve and finally discharged to the waste gas receiving system through the gas outlet isolation valve 61.

[0046] If the sampling line of the container to be tested is blocked by water and cannot be drained by the gas-water separator 5, it is purged by the nitrogen purging line 4.

[0047] The nitrogen pipeline inlet quick connector 41 is connected to the nitrogen source, and the nitrogen pipeline outlet quick connector 46 is connected to the gas sampling outlet quick connector of the container to be purged. The nitrogen pipeline inlet isolation valve 42 is opened, the nitrogen pressure regulating valve 43 is adjusted, the nitrogen pipeline pressure gauge 44 is adjusted to display a certain pressure, and the nitrogen pipeline outlet isolation valve 45 is opened to purge the gas sampling pipeline of the container to be tested.

[0048] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. A gas sampling device for a nuclear sampling system, characterized in that, The system includes a sampling device, a vapor-liquid separation device (5), an online gas measurement device (7), and an automatic nitrogen purging device. The vapor-liquid separation device (5) includes a vapor-liquid separator (51), an exhaust gas discharge line (6), and an automatic waste liquid discharge line. The top of the vapor-liquid separator (51) is connected to the exhaust gas discharge line (6), and the bottom of the vapor-liquid separator (51) is connected to the automatic waste liquid discharge line. The sampling device includes multiple sampling lines. Each sampling line has a sampling quick connector at one end and is connected to the vapor-liquid separator (51) at the other end. Each sampling line is connected to the inlet quick connector of the online gas measurement device (7) via an instrument measurement bypass line. The outlet of the online gas measurement device (7) is connected to the... The instrument measuring gas outlet pipeline is connected to the exhaust gas discharge pipeline (6); the nitrogen automatic purging device includes a nitrogen purging pipeline (4), and both ends of the nitrogen purging pipeline (4) are equipped with quick connectors; each sampling pipeline is equipped with an independent sampling inlet isolation valve, each instrument measuring bypass pipeline is equipped with an instrument measuring inlet isolation valve, the instrument measuring gas outlet pipeline is equipped with an instrument measuring gas outlet isolation valve (73), the exhaust gas discharge pipeline (6) is equipped with a gas outlet isolation valve (61), the automatic waste liquid discharge pipeline is equipped with an automatic condensate isolation valve (54), and the nitrogen purging pipeline (4) is equipped with a nitrogen pipeline inlet isolation valve (42) and a nitrogen pipeline outlet isolation valve (45).

2. The gas sampling device for a nuclear sampling system according to claim 1, characterized in that, Each sampling pipeline has a sampling quick connector without a valve body at one end and the other end connected to the upper part of the gas-water separator (51); each gas sampling pipeline is provided with a sampling inlet isolation valve, an adjustable gas flow meter, a manual gas sampling port and a pipeline check valve from left to right; each gas sampling pipeline is connected to the gas online measuring device (7) through an instrument measurement bypass pipeline; one end of each instrument measurement bypass pipeline is connected to the corresponding gas sampling pipeline and the other end is connected to the gas online measuring device (7) through an instrument measurement inlet quick connector; each instrument measurement bypass pipeline is provided with an instrument measurement inlet isolation valve.

3. The gas sampling device for a nuclear sampling system according to claim 1, characterized in that, The nitrogen purging pipeline (4) has a nitrogen pipeline inlet quick connector (41) at one end and a nitrogen pipeline outlet quick connector (46) at the other end; the nitrogen purging pipeline (4) is provided with a nitrogen pipeline inlet isolation valve (42), a nitrogen pressure regulating valve (43), a nitrogen pipeline pressure gauge (44) and a nitrogen pipeline outlet isolation valve (45) from left to right.

4. The gas sampling device for a nuclear sampling system according to claim 1, characterized in that, The steam-water separator (51) is equipped with a pressure gauge (52) and a level gauge (53).

5. The gas sampling device for a nuclear sampling system according to claim 1, characterized in that, One end of the automatic waste liquid discharge pipeline is connected to the steam-water separator (51), and the other end is equipped with an automatic drain quick connector (55); the automatic waste liquid discharge pipeline is equipped with an automatic drain isolation valve (54).

6. The gas sampling device for a nuclear sampling system according to claim 1, characterized in that, The steam-water separation device (5) also includes a manual waste liquid discharge pipeline; one end of the manual waste liquid discharge pipeline is connected to the steam-water separator (51), and the other end is equipped with a manual drain quick connector (57); a manual drain isolation valve (56) is provided on the waste liquid of the manual waste liquid discharge pipeline.

7. The gas sampling device for a nuclear sampling system according to claim 1, characterized in that, One end of the exhaust gas discharge pipeline (6) is connected to the steam-water separator (51), and the other end is equipped with a gas outlet quick connector (62); a gas outlet isolation valve (61) is provided on the exhaust gas discharge pipeline (6).

8. The gas sampling device for a nuclear sampling system according to claim 6, characterized in that, The gas online measuring device (7) includes a gas content measuring module (71); the exhaust gas discharge pipeline (6) between the gas-water separator (51) and the gas outlet isolation valve (61) is connected to the gas content measuring module (71) through an instrument measuring gas outlet pipeline; one port of the instrument measuring gas outlet pipeline is connected to the exhaust gas discharge pipeline (6), and the other port is provided with an instrument measuring gas outlet quick connector (72); the instrument measuring gas outlet pipeline is connected to the gas content measuring module (71) through the instrument measuring gas outlet quick connector (72), and an instrument measuring gas outlet isolation valve (73) is provided on the instrument measuring gas outlet pipeline.

9. The gas sampling device for a nuclear sampling system according to claim 8, characterized in that, The gas content measurement module (71) is a radioactive gas content measurement module or a hydrogen and oxygen gas content measurement module.

10. The gas sampling device for a nuclear sampling system according to claim 9, characterized in that, The hydrogen and oxygen gas content measurement module is a hydrogen and oxygen measurement and analysis instrument.

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